Merge 4ef8451b33 ("Merge tag 'perf-tools-for-v5.10-2020-11-03' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux") into android-mainline

Steps on the way to 5.10-rc3

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ia09418a96a25f6c602af953db5d3258e032c0f30

Documentation/Makefile

@@ -26,6 +26,10 @@ BUILDDIR      = $(obj)/output
 PDFLATEX      = xelatex
 LATEXOPTS     = -interaction=batchmode
 
+ifeq ($(KBUILD_VERBOSE),0)
+SPHINXOPTS    += "-q"
+endif
+
 # User-friendly check for sphinx-build
 HAVE_SPHINX := $(shell if which $(SPHINXBUILD) >/dev/null 2>&1; then echo 1; else echo 0; fi)
 

Documentation/admin-guide/LSM/SafeSetID.rst

@@ -107,7 +107,7 @@ for a UID/GID will prevent that UID/GID from obtaining auxiliary setid
 privileges, such as allowing a user to set up user namespace UID/GID mappings.
 
 Note on GID policies and setgroups()
-==================
+====================================
 In v5.9 we are adding support for limiting CAP_SETGID privileges as was done
 previously for CAP_SETUID. However, for compatibility with common sandboxing
 related code conventions in userspace, we currently allow arbitrary

Documentation/admin-guide/sysctl/net.rst

@@ -300,6 +300,7 @@ Note:
       0:    0     1     2     3     4     5     6     7
   RSS hash key:
   84:50:f4:00:a8:15:d1:a7:e9:7f:1d:60:35:c7:47:25:42:97:74:ca:56:bb:b6:a1:d8:43:e3:c9:0c:fd:17:55:c2:3a:4d:69:ed:f1:42:89
+
 netdev_tstamp_prequeue
 ----------------------
 

Documentation/arm/sunxi.rst

@@ -148,3 +148,13 @@ SunXi family
         * User Manual
 
           http://dl.linux-sunxi.org/A64/Allwinner%20A64%20User%20Manual%20v1.0.pdf
+
+      - Allwinner H6
+
+	* Datasheet
+
+	  https://linux-sunxi.org/images/5/5c/Allwinner_H6_V200_Datasheet_V1.1.pdf
+
+	* User Manual
+
+	  https://linux-sunxi.org/images/4/46/Allwinner_H6_V200_User_Manual_V1.1.pdf

Documentation/conf.py

@@ -51,7 +51,7 @@ if major >= 3:
         support for Sphinx v3.0 and above is brand new. Be prepared for
         possible issues in the generated output.
         ''')
-    if minor > 0 or patch >= 2:
+    if (major > 3) or (minor > 0 or patch >= 2):
         # Sphinx c function parser is more pedantic with regards to type
         # checking. Due to that, having macros at c:function cause problems.
         # Those needed to be scaped by using c_id_attributes[] array

Documentation/dev-tools/kasan.rst

@@ -295,11 +295,13 @@ print the number of the test and the status of the test:
 pass::
 
         ok 28 - kmalloc_double_kzfree
+
 or, if kmalloc failed::
 
         # kmalloc_large_oob_right: ASSERTION FAILED at lib/test_kasan.c:163
         Expected ptr is not null, but is
         not ok 4 - kmalloc_large_oob_right
+
 or, if a KASAN report was expected, but not found::
 
         # kmalloc_double_kzfree: EXPECTATION FAILED at lib/test_kasan.c:629

Documentation/devicetree/bindings/clock/hi6220-clock.txt

@@ -4,7 +4,7 @@ Clock control registers reside in different Hi6220 system controllers,
 please refer the following document to know more about the binding rules
 for these system controllers:
 
-Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
+Documentation/devicetree/bindings/arm/hisilicon/hisilicon.yaml
 
 Required Properties:
 

Documentation/filesystems/api-summary.rst

@@ -86,9 +86,6 @@ Other Functions
 .. kernel-doc:: fs/dax.c
    :export:
 
-.. kernel-doc:: fs/direct-io.c
-   :export:
-
 .. kernel-doc:: fs/libfs.c
    :export:
 

Documentation/gpu/amdgpu.rst

@@ -83,10 +83,6 @@ AMDGPU XGMI Support
 ===================
 
 .. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
-   :doc: AMDGPU XGMI Support
-
-.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
-   :internal:
 
 AMDGPU RAS Support
 ==================
@@ -124,9 +120,6 @@ RAS VRAM Bad Pages sysfs Interface
 .. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
    :doc: AMDGPU RAS sysfs gpu_vram_bad_pages Interface
 
-.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
-   :internal:
-
 Sample Code
 -----------
 Sample code for testing error injection can be found here:

Documentation/hwmon/adm1266.rst

@@ -20,7 +20,7 @@ ADM1266 is a sequencer that features voltage readback from 17 channels via an
 integrated 12 bit SAR ADC, accessed using a PMBus interface.
 
 The driver is a client driver to the core PMBus driver. Please see
-Documentation/hwmon/pmbus for details on PMBus client drivers.
+Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
 
 
 Sysfs entries

Documentation/hwmon/index.rst

@@ -132,6 +132,7 @@ Hardware Monitoring Kernel Drivers
    mcp3021
    menf21bmc
    mlxreg-fan
+   mp2975
    nct6683
    nct6775
    nct7802

Documentation/hwmon/mp2975.rst

@@ -20,6 +20,7 @@ This driver implements support for Monolithic Power Systems, Inc. (MPS)
 vendor dual-loop, digital, multi-phase controller MP2975.
 
 This device:
+
 - Supports up to two power rail.
 - Provides 8 pulse-width modulations (PWMs), and can be configured up
   to 8-phase operation for rail 1 and up to 4-phase operation for rail
@@ -32,10 +33,12 @@ This device:
   10-mV DAC, IMVP9 mode with 5-mV DAC.
 
 Device supports:
+
 - SVID interface.
 - AVSBus interface.
 
 Device complaint with:
+
 - PMBus rev 1.3 interface.
 
 Device supports direct format for reading output current, output voltage,
@@ -45,11 +48,14 @@ Device supports VID and direct formats for reading output voltage.
 The below VID modes are supported: VR12, VR13, IMVP9.
 
 The driver provides the next attributes for the current:
+
 - for current in: input, maximum alarm;
 - for current out input, maximum alarm and highest values;
 - for phase current: input and label.
   attributes.
+
 The driver exports the following attributes via the 'sysfs' files, where
+
 - 'n' is number of telemetry pages (from 1 to 2);
 - 'k' is number of configured phases (from 1 to 8);
 - indexes 1, 1*n for "iin";
@@ -65,11 +71,14 @@ The driver exports the following attributes via the 'sysfs' files, where
 **curr[1-{2n+k}]_label**
 
 The driver provides the next attributes for the voltage:
+
 - for voltage in: input, high critical threshold, high critical alarm, all only
   from page 0;
 - for voltage out: input, low and high critical thresholds, low and high
   critical alarms, from pages 0 and 1;
+
 The driver exports the following attributes via the 'sysfs' files, where
+
 - 'n' is number of telemetry pages (from 1 to 2);
 - indexes 1 for "iin";
 - indexes n+1, n+2 for "vout";
@@ -87,9 +96,12 @@ The driver exports the following attributes via the 'sysfs' files, where
 **in[2-{n+1}1_lcrit_alarm**
 
 The driver provides the next attributes for the power:
+
 - for power in alarm and input.
 - for power out: highest and input.
+
 The driver exports the following attributes via the 'sysfs' files, where
+
 - 'n' is number of telemetry pages (from 1 to 2);
 - indexes 1 for "pin";
 - indexes n+1, n+2 for "pout";

Documentation/locking/lockdep-design.rst

@@ -42,6 +42,7 @@ The validator tracks lock-class usage history and divides the usage into
 (4 usages * n STATEs + 1) categories:
 
 where the 4 usages can be:
+
 - 'ever held in STATE context'
 - 'ever held as readlock in STATE context'
 - 'ever held with STATE enabled'
@@ -49,10 +50,12 @@ where the 4 usages can be:
 
 where the n STATEs are coded in kernel/locking/lockdep_states.h and as of
 now they include:
+
 - hardirq
 - softirq
 
 where the last 1 category is:
+
 - 'ever used'                                       [ == !unused        ]
 
 When locking rules are violated, these usage bits are presented in the
@@ -96,9 +99,9 @@ exact case is for the lock as of the reporting time.
   +--------------+-------------+--------------+
   |              | irq enabled | irq disabled |
   +--------------+-------------+--------------+
-  | ever in irq  |      ?      |       -      |
+  | ever in irq  |     '?'     |      '-'     |
   +--------------+-------------+--------------+
-  | never in irq |      +      |       .      |
+  | never in irq |     '+'     |      '.'     |
   +--------------+-------------+--------------+
 
 The character '-' suggests irq is disabled because if otherwise the
@@ -334,7 +337,7 @@ Troubleshooting:
 ----------------
 
 The validator tracks a maximum of MAX_LOCKDEP_KEYS number of lock classes.
-Exceeding this number will trigger the following lockdep warning:
+Exceeding this number will trigger the following lockdep warning::
 
 	(DEBUG_LOCKS_WARN_ON(id >= MAX_LOCKDEP_KEYS))
 
@@ -420,7 +423,8 @@ the critical section of another reader of the same lock instance.
 
 The difference between recursive readers and non-recursive readers is because:
 recursive readers get blocked only by a write lock *holder*, while non-recursive
-readers could get blocked by a write lock *waiter*. Considering the follow example:
+readers could get blocked by a write lock *waiter*. Considering the follow
+example::
 
 	TASK A:			TASK B:
 
@@ -448,20 +452,22 @@ There are simply four block conditions:
 
 Block condition matrix, Y means the row blocks the column, and N means otherwise.
 
-	    | E | r | R |
 	+---+---+---+---+
-	  E | Y | Y | Y |
+	|   | E | r | R |
 	+---+---+---+---+
-	  r | Y | Y | N |
+	| E | Y | Y | Y |
+	+---+---+---+---+
+	| r | Y | Y | N |
+	+---+---+---+---+
+	| R | Y | Y | N |
 	+---+---+---+---+
-	  R | Y | Y | N |
 
 	(W: writers, r: non-recursive readers, R: recursive readers)
 
 
 acquired recursively. Unlike non-recursive read locks, recursive read locks
 only get blocked by current write lock *holders* other than write lock
-*waiters*, for example:
+*waiters*, for example::
 
 	TASK A:			TASK B:
 
@@ -491,7 +497,7 @@ Recursive locks don't block each other, while non-recursive locks do (this is
 even true for two non-recursive read locks). A non-recursive lock can block the
 corresponding recursive lock, and vice versa.
 
-A deadlock case with recursive locks involved is as follow:
+A deadlock case with recursive locks involved is as follow::
 
 	TASK A:			TASK B:
 
@@ -510,7 +516,7 @@ because there are 3 types for lockers, there are, in theory, 9 types of lock
 dependencies, but we can show that 4 types of lock dependencies are enough for
 deadlock detection.
 
-For each lock dependency:
+For each lock dependency::
 
 	L1 -> L2
 
@@ -525,20 +531,25 @@ same types).
 With the above combination for simplification, there are 4 types of dependency edges
 in the lockdep graph:
 
-1) -(ER)->: exclusive writer to recursive reader dependency, "X -(ER)-> Y" means
+1) -(ER)->:
+	    exclusive writer to recursive reader dependency, "X -(ER)-> Y" means
 	    X -> Y and X is a writer and Y is a recursive reader.
 
-2) -(EN)->: exclusive writer to non-recursive locker dependency, "X -(EN)-> Y" means
+2) -(EN)->:
+	    exclusive writer to non-recursive locker dependency, "X -(EN)-> Y" means
 	    X -> Y and X is a writer and Y is either a writer or non-recursive reader.
 
-3) -(SR)->: shared reader to recursive reader dependency, "X -(SR)-> Y" means
+3) -(SR)->:
+	    shared reader to recursive reader dependency, "X -(SR)-> Y" means
 	    X -> Y and X is a reader (recursive or not) and Y is a recursive reader.
 
-4) -(SN)->: shared reader to non-recursive locker dependency, "X -(SN)-> Y" means
+4) -(SN)->:
+	    shared reader to non-recursive locker dependency, "X -(SN)-> Y" means
 	    X -> Y and X is a reader (recursive or not) and Y is either a writer or
 	    non-recursive reader.
 
-Note that given two locks, they may have multiple dependencies between them, for example:
+Note that given two locks, they may have multiple dependencies between them,
+for example::
 
 	TASK A:
 
@@ -592,11 +603,11 @@ circles that won't cause deadlocks.
 
 Proof for sufficiency (Lemma 1):
 
-Let's say we have a strong circle:
+Let's say we have a strong circle::
 
 	L1 -> L2 ... -> Ln -> L1
 
-, which means we have dependencies:
+, which means we have dependencies::
 
 	L1 -> L2
 	L2 -> L3
@@ -633,7 +644,7 @@ a lock held by P2, and P2 is waiting for a lock held by P3, ... and Pn is waitin
 for a lock held by P1. Let's name the lock Px is waiting as Lx, so since P1 is waiting
 for L1 and holding Ln, so we will have Ln -> L1 in the dependency graph. Similarly,
 we have L1 -> L2, L2 -> L3, ..., Ln-1 -> Ln in the dependency graph, which means we
-have a circle:
+have a circle::
 
 	Ln -> L1 -> L2 -> ... -> Ln
 

Documentation/networking/devlink/ice.rst

@@ -70,6 +70,7 @@ The ``ice`` driver reports the following versions
         that both the name (as reported by ``fw.app.name``) and version are
         required to uniquely identify the package.
     * - ``fw.app.bundle_id``
+      - running
       - 0xc0000001
       - Unique identifier for the DDP package loaded in the device. Also
         referred to as the DDP Track ID. Can be used to uniquely identify

Documentation/networking/statistics.rst

@@ -175,5 +175,4 @@ The following structures are internal to the kernel, their members are
 translated to netlink attributes when dumped. Drivers must not overwrite
 the statistics they don't report with 0.
 
-.. kernel-doc:: include/linux/ethtool.h
+- ethtool_pause_stats()
-    :identifiers: ethtool_pause_stats

Documentation/sphinx/automarkup.py

@@ -15,6 +15,14 @@ else:
 import re
 from itertools import chain
 
+#
+# Python 2 lacks re.ASCII...
+#
+try:
+    ascii_p3 = re.ASCII
+except AttributeError:
+    ascii_p3 = 0
+
 #
 # Regex nastiness.  Of course.
 # Try to identify "function()" that's not already marked up some
@@ -22,22 +30,22 @@ from itertools import chain
 # :c:func: block (i.e. ":c:func:`mmap()`s" flakes out), so the last
 # bit tries to restrict matches to things that won't create trouble.
 #
-RE_function = re.compile(r'\b(([a-zA-Z_]\w+)\(\))', flags=re.ASCII)
+RE_function = re.compile(r'\b(([a-zA-Z_]\w+)\(\))', flags=ascii_p3)
 
 #
 # Sphinx 2 uses the same :c:type role for struct, union, enum and typedef
 #
 RE_generic_type = re.compile(r'\b(struct|union|enum|typedef)\s+([a-zA-Z_]\w+)',
-                             flags=re.ASCII)
+                             flags=ascii_p3)
 
 #
 # Sphinx 3 uses a different C role for each one of struct, union, enum and
 # typedef
 #
-RE_struct = re.compile(r'\b(struct)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
+RE_struct = re.compile(r'\b(struct)\s+([a-zA-Z_]\w+)', flags=ascii_p3)
-RE_union = re.compile(r'\b(union)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
+RE_union = re.compile(r'\b(union)\s+([a-zA-Z_]\w+)', flags=ascii_p3)
-RE_enum = re.compile(r'\b(enum)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
+RE_enum = re.compile(r'\b(enum)\s+([a-zA-Z_]\w+)', flags=ascii_p3)
-RE_typedef = re.compile(r'\b(typedef)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
+RE_typedef = re.compile(r'\b(typedef)\s+([a-zA-Z_]\w+)', flags=ascii_p3)
 
 #
 # Detects a reference to a documentation page of the form Documentation/... with

Documentation/userspace-api/index.rst

@@ -22,6 +22,7 @@ place where this information is gathered.
    spec_ctrl
    accelerators/ocxl
    ioctl/index
+   iommu
    media/index
 
 .. only::  subproject and html

MAINTAINERS

@@ -978,7 +978,7 @@ M:	Michael Hennerich <Michael.Hennerich@analog.com>
 L:	linux-iio@vger.kernel.org
 S:	Supported
 W:	http://ez.analog.com/community/linux-device-drivers
-F:	Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.txt
+F:	Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
 F:	drivers/iio/adc/ad7768-1.c
 
 ANALOG DEVICES INC AD7780 DRIVER
@@ -3857,7 +3857,7 @@ M:	Roger Quadros <rogerq@ti.com>
 L:	linux-usb@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
-F:	Documentation/devicetree/bindings/usb/cdns-usb3.txt
+F:	Documentation/devicetree/bindings/usb/cdns,usb3.yaml
 F:	drivers/usb/cdns3/
 
 CADET FM/AM RADIO RECEIVER DRIVER
@@ -7916,7 +7916,7 @@ HISILICON LPC BUS DRIVER
 M:	john.garry@huawei.com
 S:	Maintained
 W:	http://www.hisilicon.com
-F:	Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt
+F:	Documentation/devicetree/bindings/arm/hisilicon/low-pin-count.yaml
 F:	drivers/bus/hisi_lpc.c
 
 HISILICON NETWORK SUBSYSTEM 3 DRIVER (HNS3)
@@ -14895,7 +14895,6 @@ RENESAS ETHERNET DRIVERS
 R:	Sergei Shtylyov <sergei.shtylyov@gmail.com>
 L:	netdev@vger.kernel.org
 L:	linux-renesas-soc@vger.kernel.org
-F:	Documentation/devicetree/bindings/net/renesas,*.txt
 F:	Documentation/devicetree/bindings/net/renesas,*.yaml
 F:	drivers/net/ethernet/renesas/
 F:	include/linux/sh_eth.h
@@ -18096,7 +18095,7 @@ M:	Yu Chen <chenyu56@huawei.com>
 M:	Binghui Wang <wangbinghui@hisilicon.com>
 L:	linux-usb@vger.kernel.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/phy/phy-hi3660-usb3.txt
+F:	Documentation/devicetree/bindings/phy/hisilicon,hi3660-usb3.yaml
 F:	drivers/phy/hisilicon/phy-hi3660-usb3.c
 
 USB ISP116X DRIVER

arch/x86/boot/compressed/ident_map_64.c

@@ -164,6 +164,7 @@ void initialize_identity_maps(void *rmode)
 	add_identity_map(cmdline, cmdline + COMMAND_LINE_SIZE);
 
 	/* Load the new page-table. */
+	sev_verify_cbit(top_level_pgt);
 	write_cr3(top_level_pgt);
 }
 

arch/x86/boot/compressed/mem_encrypt.S

@@ -68,6 +68,9 @@ SYM_FUNC_START(get_sev_encryption_bit)
 SYM_FUNC_END(get_sev_encryption_bit)
 
 	.code64
+
+#include "../../kernel/sev_verify_cbit.S"
+
 SYM_FUNC_START(set_sev_encryption_mask)
 #ifdef CONFIG_AMD_MEM_ENCRYPT
 	push	%rbp
@@ -81,6 +84,19 @@ SYM_FUNC_START(set_sev_encryption_mask)
 
 	bts	%rax, sme_me_mask(%rip)	/* Create the encryption mask */
 
+	/*
+	 * Read MSR_AMD64_SEV again and store it to sev_status. Can't do this in
+	 * get_sev_encryption_bit() because this function is 32-bit code and
+	 * shared between 64-bit and 32-bit boot path.
+	 */
+	movl	$MSR_AMD64_SEV, %ecx	/* Read the SEV MSR */
+	rdmsr
+
+	/* Store MSR value in sev_status */
+	shlq	$32, %rdx
+	orq	%rdx, %rax
+	movq	%rax, sev_status(%rip)
+
 .Lno_sev_mask:
 	movq	%rbp, %rsp		/* Restore original stack pointer */
 
@@ -97,4 +113,6 @@ SYM_FUNC_END(set_sev_encryption_mask)
 #ifdef CONFIG_AMD_MEM_ENCRYPT
 	.balign	8
 SYM_DATA(sme_me_mask,		.quad 0)
+SYM_DATA(sev_status,		.quad 0)
+SYM_DATA(sev_check_data,	.quad 0)
 #endif

arch/x86/boot/compressed/misc.h

@@ -159,4 +159,6 @@ void boot_page_fault(void);
 void boot_stage1_vc(void);
 void boot_stage2_vc(void);
 
+unsigned long sev_verify_cbit(unsigned long cr3);
+
 #endif /* BOOT_COMPRESSED_MISC_H */

arch/x86/kernel/head_64.S

@@ -161,6 +161,21 @@ SYM_INNER_LABEL(secondary_startup_64_no_verify, SYM_L_GLOBAL)
 
 	/* Setup early boot stage 4-/5-level pagetables. */
 	addq	phys_base(%rip), %rax
+
+	/*
+	 * For SEV guests: Verify that the C-bit is correct. A malicious
+	 * hypervisor could lie about the C-bit position to perform a ROP
+	 * attack on the guest by writing to the unencrypted stack and wait for
+	 * the next RET instruction.
+	 * %rsi carries pointer to realmode data and is callee-clobbered. Save
+	 * and restore it.
+	 */
+	pushq	%rsi
+	movq	%rax, %rdi
+	call	sev_verify_cbit
+	popq	%rsi
+
+	/* Switch to new page-table */
 	movq	%rax, %cr3
 
 	/* Ensure I am executing from virtual addresses */
@@ -279,6 +294,7 @@ SYM_INNER_LABEL(secondary_startup_64_no_verify, SYM_L_GLOBAL)
 SYM_CODE_END(secondary_startup_64)
 
 #include "verify_cpu.S"
+#include "sev_verify_cbit.S"
 
 #ifdef CONFIG_HOTPLUG_CPU
 /*

arch/x86/kernel/sev-es-shared.c

@@ -178,6 +178,32 @@ void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code)
 		goto fail;
 	regs->dx = val >> 32;
 
+	/*
+	 * This is a VC handler and the #VC is only raised when SEV-ES is
+	 * active, which means SEV must be active too. Do sanity checks on the
+	 * CPUID results to make sure the hypervisor does not trick the kernel
+	 * into the no-sev path. This could map sensitive data unencrypted and
+	 * make it accessible to the hypervisor.
+	 *
+	 * In particular, check for:
+	 *	- Hypervisor CPUID bit
+	 *	- Availability of CPUID leaf 0x8000001f
+	 *	- SEV CPUID bit.
+	 *
+	 * The hypervisor might still report the wrong C-bit position, but this
+	 * can't be checked here.
+	 */
+
+	if ((fn == 1 && !(regs->cx & BIT(31))))
+		/* Hypervisor bit */
+		goto fail;
+	else if (fn == 0x80000000 && (regs->ax < 0x8000001f))
+		/* SEV leaf check */
+		goto fail;
+	else if ((fn == 0x8000001f && !(regs->ax & BIT(1))))
+		/* SEV bit */
+		goto fail;
+
 	/* Skip over the CPUID two-byte opcode */
 	regs->ip += 2;
 

arch/x86/kernel/sev-es.c

@@ -374,7 +374,7 @@ fault:
 	return ES_EXCEPTION;
 }
 
-static bool vc_slow_virt_to_phys(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
+static enum es_result vc_slow_virt_to_phys(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
 					   unsigned long vaddr, phys_addr_t *paddr)
 {
 	unsigned long va = (unsigned long)vaddr;
@@ -394,15 +394,19 @@ static bool vc_slow_virt_to_phys(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
 		if (user_mode(ctxt->regs))
 			ctxt->fi.error_code |= X86_PF_USER;
 
-		return false;
+		return ES_EXCEPTION;
 	}
 
+	if (WARN_ON_ONCE(pte_val(*pte) & _PAGE_ENC))
+		/* Emulated MMIO to/from encrypted memory not supported */
+		return ES_UNSUPPORTED;
+
 	pa = (phys_addr_t)pte_pfn(*pte) << PAGE_SHIFT;
 	pa |= va & ~page_level_mask(level);
 
 	*paddr = pa;
 
-	return true;
+	return ES_OK;
 }
 
 /* Include code shared with pre-decompression boot stage */
@@ -731,6 +735,7 @@ static enum es_result vc_do_mmio(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
 {
 	u64 exit_code, exit_info_1, exit_info_2;
 	unsigned long ghcb_pa = __pa(ghcb);
+	enum es_result res;
 	phys_addr_t paddr;
 	void __user *ref;
 
@@ -740,11 +745,12 @@ static enum es_result vc_do_mmio(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
 
 	exit_code = read ? SVM_VMGEXIT_MMIO_READ : SVM_VMGEXIT_MMIO_WRITE;
 
-	if (!vc_slow_virt_to_phys(ghcb, ctxt, (unsigned long)ref, &paddr)) {
+	res = vc_slow_virt_to_phys(ghcb, ctxt, (unsigned long)ref, &paddr);
-		if (!read)
+	if (res != ES_OK) {
+		if (res == ES_EXCEPTION && !read)
 			ctxt->fi.error_code |= X86_PF_WRITE;
 
-		return ES_EXCEPTION;
+		return res;
 	}
 
 	exit_info_1 = paddr;

arch/x86/kernel/sev_verify_cbit.S

@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *	sev_verify_cbit.S - Code for verification of the C-bit position reported
+ *			    by the Hypervisor when running with SEV enabled.
+ *
+ *	Copyright (c) 2020  Joerg Roedel (jroedel@suse.de)
+ *
+ * sev_verify_cbit() is called before switching to a new long-mode page-table
+ * at boot.
+ *
+ * Verify that the C-bit position is correct by writing a random value to
+ * an encrypted memory location while on the current page-table. Then it
+ * switches to the new page-table to verify the memory content is still the
+ * same. After that it switches back to the current page-table and when the
+ * check succeeded it returns. If the check failed the code invalidates the
+ * stack pointer and goes into a hlt loop. The stack-pointer is invalidated to
+ * make sure no interrupt or exception can get the CPU out of the hlt loop.
+ *
+ * New page-table pointer is expected in %rdi (first parameter)
+ *
+ */
+SYM_FUNC_START(sev_verify_cbit)
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+	/* First check if a C-bit was detected */
+	movq	sme_me_mask(%rip), %rsi
+	testq	%rsi, %rsi
+	jz	3f
+
+	/* sme_me_mask != 0 could mean SME or SEV - Check also for SEV */
+	movq	sev_status(%rip), %rsi
+	testq	%rsi, %rsi
+	jz	3f
+
+	/* Save CR4 in %rsi */
+	movq	%cr4, %rsi
+
+	/* Disable Global Pages */
+	movq	%rsi, %rdx
+	andq	$(~X86_CR4_PGE), %rdx
+	movq	%rdx, %cr4
+
+	/*
+	 * Verified that running under SEV - now get a random value using
+	 * RDRAND. This instruction is mandatory when running as an SEV guest.
+	 *
+	 * Don't bail out of the loop if RDRAND returns errors. It is better to
+	 * prevent forward progress than to work with a non-random value here.
+	 */
+1:	rdrand	%rdx
+	jnc	1b
+
+	/* Store value to memory and keep it in %rdx */
+	movq	%rdx, sev_check_data(%rip)
+
+	/* Backup current %cr3 value to restore it later */
+	movq	%cr3, %rcx
+
+	/* Switch to new %cr3 - This might unmap the stack */
+	movq	%rdi, %cr3
+
+	/*
+	 * Compare value in %rdx with memory location. If C-bit is incorrect
+	 * this would read the encrypted data and make the check fail.
+	 */
+	cmpq	%rdx, sev_check_data(%rip)
+
+	/* Restore old %cr3 */
+	movq	%rcx, %cr3
+
+	/* Restore previous CR4 */
+	movq	%rsi, %cr4
+
+	/* Check CMPQ result */
+	je	3f
+
+	/*
+	 * The check failed, prevent any forward progress to prevent ROP
+	 * attacks, invalidate the stack and go into a hlt loop.
+	 */
+	xorq	%rsp, %rsp
+	subq	$0x1000, %rsp
+2:	hlt
+	jmp 2b
+3:
+#endif
+	/* Return page-table pointer */
+	movq	%rdi, %rax
+	ret
+SYM_FUNC_END(sev_verify_cbit)

arch/x86/mm/mem_encrypt.c

@@ -39,6 +39,7 @@
  */
 u64 sme_me_mask __section(".data") = 0;
 u64 sev_status __section(".data") = 0;
+u64 sev_check_data __section(".data") = 0;
 EXPORT_SYMBOL(sme_me_mask);
 DEFINE_STATIC_KEY_FALSE(sev_enable_key);
 EXPORT_SYMBOL_GPL(sev_enable_key);

drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c

@@ -7,7 +7,7 @@
  *
  * This file add support for MD5 and SHA1/SHA224/SHA256/SHA384/SHA512.
  *
- * You could find the datasheet in Documentation/arm/sunxi/README
+ * You could find the datasheet in Documentation/arm/sunxi.rst
  */
 #include <linux/dma-mapping.h>
 #include <linux/pm_runtime.h>

drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c

@@ -7,7 +7,7 @@
  *
  * This file handle the PRNG
  *
- * You could find a link for the datasheet in Documentation/arm/sunxi/README
+ * You could find a link for the datasheet in Documentation/arm/sunxi.rst
  */
 #include "sun8i-ce.h"
 #include <linux/dma-mapping.h>

drivers/crypto/allwinner/sun8i-ce/sun8i-ce-trng.c

@@ -7,7 +7,7 @@
  *
  * This file handle the TRNG
  *
- * You could find a link for the datasheet in Documentation/arm/sunxi/README
+ * You could find a link for the datasheet in Documentation/arm/sunxi.rst
  */
 #include "sun8i-ce.h"
 #include <linux/dma-mapping.h>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -239,9 +239,11 @@ bool amdgpu_device_supports_baco(struct drm_device *dev)
 	return amdgpu_asic_supports_baco(adev);
 }
 
+/*
+ * VRAM access helper functions
+ */
+
 /**
- * VRAM access helper functions.
- *
  * amdgpu_device_vram_access - read/write a buffer in vram
  *
  * @adev: amdgpu_device pointer
@@ -705,7 +707,7 @@ void amdgpu_device_indirect_wreg64(struct amdgpu_device *adev,
 /**
  * amdgpu_invalid_rreg - dummy reg read function
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @reg: offset of register
  *
  * Dummy register read function.  Used for register blocks
@@ -722,7 +724,7 @@ static uint32_t amdgpu_invalid_rreg(struct amdgpu_device *adev, uint32_t reg)
 /**
  * amdgpu_invalid_wreg - dummy reg write function
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @reg: offset of register
  * @v: value to write to the register
  *
@@ -739,7 +741,7 @@ static void amdgpu_invalid_wreg(struct amdgpu_device *adev, uint32_t reg, uint32
 /**
  * amdgpu_invalid_rreg64 - dummy 64 bit reg read function
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @reg: offset of register
  *
  * Dummy register read function.  Used for register blocks
@@ -756,7 +758,7 @@ static uint64_t amdgpu_invalid_rreg64(struct amdgpu_device *adev, uint32_t reg)
 /**
  * amdgpu_invalid_wreg64 - dummy reg write function
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @reg: offset of register
  * @v: value to write to the register
  *
@@ -773,7 +775,7 @@ static void amdgpu_invalid_wreg64(struct amdgpu_device *adev, uint32_t reg, uint
 /**
  * amdgpu_block_invalid_rreg - dummy reg read function
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @block: offset of instance
  * @reg: offset of register
  *
@@ -793,7 +795,7 @@ static uint32_t amdgpu_block_invalid_rreg(struct amdgpu_device *adev,
 /**
  * amdgpu_block_invalid_wreg - dummy reg write function
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @block: offset of instance
  * @reg: offset of register
  * @v: value to write to the register
@@ -813,7 +815,7 @@ static void amdgpu_block_invalid_wreg(struct amdgpu_device *adev,
 /**
  * amdgpu_device_asic_init - Wrapper for atom asic_init
  *
- * @dev: drm_device pointer
+ * @adev: amdgpu_device pointer
  *
  * Does any asic specific work and then calls atom asic init.
  */
@@ -827,7 +829,7 @@ static int amdgpu_device_asic_init(struct amdgpu_device *adev)
 /**
  * amdgpu_device_vram_scratch_init - allocate the VRAM scratch page
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  *
  * Allocates a scratch page of VRAM for use by various things in the
  * driver.
@@ -844,7 +846,7 @@ static int amdgpu_device_vram_scratch_init(struct amdgpu_device *adev)
 /**
  * amdgpu_device_vram_scratch_fini - Free the VRAM scratch page
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  *
  * Frees the VRAM scratch page.
  */
@@ -3011,7 +3013,7 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 /**
  * amdgpu_device_has_dc_support - check if dc is supported
  *
- * @adev: amdgpu_device_pointer
+ * @adev: amdgpu_device pointer
  *
  * Returns true for supported, false for not supported
  */
@@ -4045,7 +4047,7 @@ static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
 /**
  * amdgpu_device_reset_sriov - reset ASIC for SR-IOV vf
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @from_hypervisor: request from hypervisor
  *
  * do VF FLR and reinitialize Asic
@@ -4100,7 +4102,7 @@ error:
 /**
  * amdgpu_device_has_job_running - check if there is any job in mirror list
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  *
  * check if there is any job in mirror list
  */
@@ -4128,7 +4130,7 @@ bool amdgpu_device_has_job_running(struct amdgpu_device *adev)
 /**
  * amdgpu_device_should_recover_gpu - check if we should try GPU recovery
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  *
  * Check amdgpu_gpu_recovery and SRIOV status to see if we should try to recover
  * a hung GPU.
@@ -4477,7 +4479,7 @@ static int amdgpu_device_suspend_display_audio(struct amdgpu_device *adev)
 /**
  * amdgpu_device_gpu_recover - reset the asic and recover scheduler
  *
- * @adev: amdgpu device pointer
+ * @adev: amdgpu_device pointer
  * @job: which job trigger hang
  *
  * Attempt to reset the GPU if it has hung (all asics).
@@ -4497,7 +4499,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
 	bool need_emergency_restart = false;
 	bool audio_suspended = false;
 
-	/**
+	/*
 	 * Special case: RAS triggered and full reset isn't supported
 	 */
 	need_emergency_restart = amdgpu_ras_need_emergency_restart(adev);

drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c

@@ -81,8 +81,8 @@ static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func;
 /**
  * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
  *
- * @man: TTM memory type manager
+ * @adev: amdgpu_device pointer
- * @p_size: maximum size of GTT
+ * @gtt_size: maximum size of GTT
  *
  * Allocate and initialize the GTT manager.
  */
@@ -123,7 +123,7 @@ int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
 /**
  * amdgpu_gtt_mgr_fini - free and destroy GTT manager
  *
- * @man: TTM memory type manager
+ * @adev: amdgpu_device pointer
  *
  * Destroy and free the GTT manager, returns -EBUSY if ranges are still
  * allocated inside it.

drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c

@@ -168,8 +168,7 @@ static const struct ttm_resource_manager_func amdgpu_vram_mgr_func;
 /**
  * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
  *
- * @man: TTM memory type manager
+ * @adev: amdgpu_device pointer
- * @p_size: maximum size of VRAM
  *
  * Allocate and initialize the VRAM manager.
  */
@@ -199,7 +198,7 @@ int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
 /**
  * amdgpu_vram_mgr_fini - free and destroy VRAM manager
  *
- * @man: TTM memory type manager
+ * @adev: amdgpu_device pointer
  *
  * Destroy and free the VRAM manager, returns -EBUSY if ranges are still
  * allocated inside it.
@@ -229,7 +228,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
 /**
  * amdgpu_vram_mgr_vis_size - Calculate visible node size
  *
- * @adev: amdgpu device structure
+ * @adev: amdgpu_device pointer
  * @node: MM node structure
  *
  * Calculate how many bytes of the MM node are inside visible VRAM

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -583,7 +583,7 @@ static void amdgpu_dm_fbc_init(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
 	struct amdgpu_device *adev = drm_to_adev(dev);
-	struct dm_comressor_info *compressor = &adev->dm.compressor;
+	struct dm_compressor_info *compressor = &adev->dm.compressor;
 	struct amdgpu_dm_connector *aconn = to_amdgpu_dm_connector(connector);
 	struct drm_display_mode *mode;
 	unsigned long max_size = 0;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h

@@ -86,7 +86,7 @@ struct irq_list_head {
  * @bo_ptr: Pointer to the buffer object
  * @gpu_addr: MMIO gpu addr
  */
-struct dm_comressor_info {
+struct dm_compressor_info {
 	void *cpu_addr;
 	struct amdgpu_bo *bo_ptr;
 	uint64_t gpu_addr;
@@ -148,7 +148,7 @@ struct amdgpu_dm_backlight_caps {
  * @soc_bounding_box: SOC bounding box values provided by gpu_info FW
  * @cached_state: Caches device atomic state for suspend/resume
  * @cached_dc_state: Cached state of content streams
- * @compressor: Frame buffer compression buffer. See &struct dm_comressor_info
+ * @compressor: Frame buffer compression buffer. See &struct dm_compressor_info
  * @force_timing_sync: set via debugfs. When set, indicates that all connected
  *		       displays will be forced to synchronize.
  */
@@ -324,7 +324,7 @@ struct amdgpu_display_manager {
 	struct drm_atomic_state *cached_state;
 	struct dc_state *cached_dc_state;
 
-	struct dm_comressor_info compressor;
+	struct dm_compressor_info compressor;
 
 	const struct firmware *fw_dmcu;
 	uint32_t dmcu_fw_version;

drivers/infiniband/ulp/srpt/ib_srpt.h

@@ -256,6 +256,7 @@ enum rdma_ch_state {
  * @rdma_cm:	   See below.
  * @rdma_cm.cm_id: RDMA CM ID associated with the channel.
  * @cq:            IB completion queue for this channel.
+ * @cq_size:	   Number of CQEs in @cq.
  * @zw_cqe:	   Zero-length write CQE.
  * @rcu:           RCU head.
  * @kref:	   kref for this channel.

drivers/of/device.c

@@ -112,7 +112,7 @@ int of_dma_configure_id(struct device *dev, struct device_node *np,
 		u64 dma_end = 0;
 
 		/* Determine the overall bounds of all DMA regions */
-		for (dma_start = ~0ULL; r->size; r++) {
+		for (dma_start = ~0; r->size; r++) {
 			/* Take lower and upper limits */
 			if (r->dma_start < dma_start)
 				dma_start = r->dma_start;

drivers/staging/wfx/Documentation/devicetree/bindings/net/wireless/silabs,wfx.yaml

@@ -24,7 +24,7 @@ description:
     In addition, it is recommended to declare a mmc-pwrseq on SDIO host above
     WFx. Without it, you may encounter issues with warm boot. The mmc-pwrseq
     should be compatible with mmc-pwrseq-simple. Please consult
-    Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt for more
+    Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.yaml for more
     information.
 
   For SPI':'

drivers/tty/vt/vt_ioctl.c

@@ -484,7 +484,7 @@ static int vt_k_ioctl(struct tty_struct *tty, unsigned int cmd,
 	return 0;
 }
 
-static inline int do_fontx_ioctl(int cmd,
+static inline int do_fontx_ioctl(struct vc_data *vc, int cmd,
 		struct consolefontdesc __user *user_cfd,
 		struct console_font_op *op)
 {
@@ -502,15 +502,16 @@ static inline int do_fontx_ioctl(int cmd,
 		op->height = cfdarg.charheight;
 		op->charcount = cfdarg.charcount;
 		op->data = cfdarg.chardata;
-		return con_font_op(vc_cons[fg_console].d, op);
+		return con_font_op(vc, op);
-	case GIO_FONTX: {
+
+	case GIO_FONTX:
 		op->op = KD_FONT_OP_GET;
 		op->flags = KD_FONT_FLAG_OLD;
 		op->width = 8;
 		op->height = cfdarg.charheight;
 		op->charcount = cfdarg.charcount;
 		op->data = cfdarg.chardata;
-		i = con_font_op(vc_cons[fg_console].d, op);
+		i = con_font_op(vc, op);
 		if (i)
 			return i;
 		cfdarg.charheight = op->height;
@@ -519,11 +520,10 @@ static inline int do_fontx_ioctl(int cmd,
 			return -EFAULT;
 		return 0;
 	}
-	}
 	return -EINVAL;
 }
 
-static int vt_io_fontreset(struct console_font_op *op)
+static int vt_io_fontreset(struct vc_data *vc, struct console_font_op *op)
 {
 	int ret;
 
@@ -537,12 +537,12 @@ static int vt_io_fontreset(struct console_font_op *op)
 
 	op->op = KD_FONT_OP_SET_DEFAULT;
 	op->data = NULL;
-	ret = con_font_op(vc_cons[fg_console].d, op);
+	ret = con_font_op(vc, op);
 	if (ret)
 		return ret;
 
 	console_lock();
-	con_set_default_unimap(vc_cons[fg_console].d);
+	con_set_default_unimap(vc);
 	console_unlock();
 
 	return 0;
@@ -584,7 +584,7 @@ static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
 		op.height = 0;
 		op.charcount = 256;
 		op.data = up;
-		return con_font_op(vc_cons[fg_console].d, &op);
+		return con_font_op(vc, &op);
 
 	case GIO_FONT:
 		op.op = KD_FONT_OP_GET;
@@ -593,7 +593,7 @@ static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
 		op.height = 32;
 		op.charcount = 256;
 		op.data = up;
-		return con_font_op(vc_cons[fg_console].d, &op);
+		return con_font_op(vc, &op);
 
 	case PIO_CMAP:
                 if (!perm)
@@ -609,13 +609,13 @@ static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
 
 		fallthrough;
 	case GIO_FONTX:
-		return do_fontx_ioctl(cmd, up, &op);
+		return do_fontx_ioctl(vc, cmd, up, &op);
 
 	case PIO_FONTRESET:
 		if (!perm)
 			return -EPERM;
 
-		return vt_io_fontreset(&op);
+		return vt_io_fontreset(vc, &op);
 
 	case PIO_SCRNMAP:
 		if (!perm)
@@ -1066,7 +1066,8 @@ struct compat_consolefontdesc {
 };
 
 static inline int
-compat_fontx_ioctl(int cmd, struct compat_consolefontdesc __user *user_cfd,
+compat_fontx_ioctl(struct vc_data *vc, int cmd,
+		   struct compat_consolefontdesc __user *user_cfd,
 		   int perm, struct console_font_op *op)
 {
 	struct compat_consolefontdesc cfdarg;
@@ -1085,7 +1086,8 @@ compat_fontx_ioctl(int cmd, struct compat_consolefontdesc __user *user_cfd,
 		op->height = cfdarg.charheight;
 		op->charcount = cfdarg.charcount;
 		op->data = compat_ptr(cfdarg.chardata);
-		return con_font_op(vc_cons[fg_console].d, op);
+		return con_font_op(vc, op);
+
 	case GIO_FONTX:
 		op->op = KD_FONT_OP_GET;
 		op->flags = KD_FONT_FLAG_OLD;
@@ -1093,7 +1095,7 @@ compat_fontx_ioctl(int cmd, struct compat_consolefontdesc __user *user_cfd,
 		op->height = cfdarg.charheight;
 		op->charcount = cfdarg.charcount;
 		op->data = compat_ptr(cfdarg.chardata);
-		i = con_font_op(vc_cons[fg_console].d, op);
+		i = con_font_op(vc, op);
 		if (i)
 			return i;
 		cfdarg.charheight = op->height;
@@ -1183,7 +1185,7 @@ long vt_compat_ioctl(struct tty_struct *tty,
 	 */
 	case PIO_FONTX:
 	case GIO_FONTX:
-		return compat_fontx_ioctl(cmd, up, perm, &op);
+		return compat_fontx_ioctl(vc, cmd, up, perm, &op);
 
 	case KDFONTOP:
 		return compat_kdfontop_ioctl(up, perm, &op, vc);

fs/afs/xattr.c

@@ -148,11 +148,6 @@ static const struct xattr_handler afs_xattr_afs_acl_handler = {
 	.set    = afs_xattr_set_acl,
 };
 
-static void yfs_acl_put(struct afs_operation *op)
-{
-	yfs_free_opaque_acl(op->yacl);
-}
-
 static const struct afs_operation_ops yfs_fetch_opaque_acl_operation = {
 	.issue_yfs_rpc	= yfs_fs_fetch_opaque_acl,
 	.success	= afs_acl_success,
@@ -246,7 +241,7 @@ error:
 static const struct afs_operation_ops yfs_store_opaque_acl2_operation = {
 	.issue_yfs_rpc	= yfs_fs_store_opaque_acl2,
 	.success	= afs_acl_success,
-	.put		= yfs_acl_put,
+	.put		= afs_acl_put,
 };
 
 /*

fs/afs/yfsclient.c

@@ -1990,6 +1990,7 @@ void yfs_fs_store_opaque_acl2(struct afs_operation *op)
 	memcpy(bp, acl->data, acl->size);
 	if (acl->size != size)
 		memset((void *)bp + acl->size, 0, size - acl->size);
+	bp += size / sizeof(__be32);
 	yfs_check_req(call, bp);
 
 	trace_afs_make_fs_call(call, &vp->fid);

fs/proc/base.c

@@ -1050,6 +1050,8 @@ static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count,
 		oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
 			  OOM_SCORE_ADJ_MAX;
 	put_task_struct(task);
+	if (oom_adj > OOM_ADJUST_MAX)
+		oom_adj = OOM_ADJUST_MAX;
 	len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
 	return simple_read_from_buffer(buf, count, ppos, buffer, len);
 }

include/linux/blk-mq.h

@@ -235,6 +235,8 @@ enum hctx_type {
  * @flags:	   Zero or more BLK_MQ_F_* flags.
  * @driver_data:   Pointer to data owned by the block driver that created this
  *		   tag set.
+ * @active_queues_shared_sbitmap:
+ * 		   number of active request queues per tag set.
  * @__bitmap_tags: A shared tags sbitmap, used over all hctx's
  * @__breserved_tags:
  *		   A shared reserved tags sbitmap, used over all hctx's

include/linux/mm.h

@@ -2760,6 +2760,15 @@ static inline vm_fault_t vmf_insert_page(struct vm_area_struct *vma,
 	return VM_FAULT_NOPAGE;
 }
 
+#ifndef io_remap_pfn_range
+static inline int io_remap_pfn_range(struct vm_area_struct *vma,
+				     unsigned long addr, unsigned long pfn,
+				     unsigned long size, pgprot_t prot)
+{
+	return remap_pfn_range(vma, addr, pfn, size, pgprot_decrypted(prot));
+}
+#endif
+
 static inline vm_fault_t vmf_error(int err)
 {
 	if (err == -ENOMEM)

include/linux/pagemap.h

@@ -344,9 +344,9 @@ static inline struct page *find_get_page_flags(struct address_space *mapping,
 /**
  * find_lock_page - locate, pin and lock a pagecache page
  * @mapping: the address_space to search
- * @offset: the page index
+ * @index: the page index
  *
- * Looks up the page cache entry at @mapping & @offset.  If there is a
+ * Looks up the page cache entry at @mapping & @index.  If there is a
  * page cache page, it is returned locked and with an increased
  * refcount.
  *
@@ -363,9 +363,9 @@ static inline struct page *find_lock_page(struct address_space *mapping,
 /**
  * find_lock_head - Locate, pin and lock a pagecache page.
  * @mapping: The address_space to search.
- * @offset: The page index.
+ * @index: The page index.
  *
- * Looks up the page cache entry at @mapping & @offset.  If there is a
+ * Looks up the page cache entry at @mapping & @index.  If there is a
  * page cache page, its head page is returned locked and with an increased
  * refcount.
  *

include/linux/pgtable.h

@@ -1427,10 +1427,6 @@ typedef unsigned int pgtbl_mod_mask;
 
 #endif /* !__ASSEMBLY__ */
 
-#ifndef io_remap_pfn_range
-#define io_remap_pfn_range remap_pfn_range
-#endif
-
 #ifndef has_transparent_hugepage
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 #define has_transparent_hugepage() 1

include/linux/phy.h

@@ -147,16 +147,8 @@ typedef enum {
 	PHY_INTERFACE_MODE_MAX,
 } phy_interface_t;
 
-/**
+/*
  * phy_supported_speeds - return all speeds currently supported by a PHY device
- * @phy: The PHY device to return supported speeds of.
- * @speeds: buffer to store supported speeds in.
- * @size: size of speeds buffer.
- *
- * Description: Returns the number of supported speeds, and fills
- * the speeds buffer with the supported speeds. If speeds buffer is
- * too small to contain all currently supported speeds, will return as
- * many speeds as can fit.
  */
 unsigned int phy_supported_speeds(struct phy_device *phy,
 				      unsigned int *speeds,
@@ -1022,14 +1014,9 @@ static inline int __phy_modify_changed(struct phy_device *phydev, u32 regnum,
 					regnum, mask, set);
 }
 
-/**
+/*
  * phy_read_mmd - Convenience function for reading a register
  * from an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to read from
- * @regnum: The register on the MMD to read
- *
- * Same rules as for phy_read();
  */
 int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum);
 
@@ -1064,38 +1051,21 @@ int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum);
 	__ret; \
 })
 
-/**
+/*
  * __phy_read_mmd - Convenience function for reading a register
  * from an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to read from
- * @regnum: The register on the MMD to read
- *
- * Same rules as for __phy_read();
  */
 int __phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum);
 
-/**
+/*
  * phy_write_mmd - Convenience function for writing a register
  * on an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to write to
- * @regnum: The register on the MMD to read
- * @val: value to write to @regnum
- *
- * Same rules as for phy_write();
  */
 int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val);
 
-/**
+/*
  * __phy_write_mmd - Convenience function for writing a register
  * on an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to write to
- * @regnum: The register on the MMD to read
- * @val: value to write to @regnum
- *
- * Same rules as for __phy_write();
  */
 int __phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val);
 

include/linux/refcount.h

@@ -147,24 +147,6 @@ static inline unsigned int refcount_read(const refcount_t *r)
 	return atomic_read(&r->refs);
 }
 
-/**
- * refcount_add_not_zero - add a value to a refcount unless it is 0
- * @i: the value to add to the refcount
- * @r: the refcount
- *
- * Will saturate at REFCOUNT_SATURATED and WARN.
- *
- * Provides no memory ordering, it is assumed the caller has guaranteed the
- * object memory to be stable (RCU, etc.). It does provide a control dependency
- * and thereby orders future stores. See the comment on top.
- *
- * Use of this function is not recommended for the normal reference counting
- * use case in which references are taken and released one at a time.  In these
- * cases, refcount_inc(), or one of its variants, should instead be used to
- * increment a reference count.
- *
- * Return: false if the passed refcount is 0, true otherwise
- */
 static inline __must_check bool __refcount_add_not_zero(int i, refcount_t *r, int *oldp)
 {
 	int old = refcount_read(r);
@@ -183,11 +165,42 @@ static inline __must_check bool __refcount_add_not_zero(int i, refcount_t *r, in
 	return old;
 }
 
+/**
+ * refcount_add_not_zero - add a value to a refcount unless it is 0
+ * @i: the value to add to the refcount
+ * @r: the refcount
+ *
+ * Will saturate at REFCOUNT_SATURATED and WARN.
+ *
+ * Provides no memory ordering, it is assumed the caller has guaranteed the
+ * object memory to be stable (RCU, etc.). It does provide a control dependency
+ * and thereby orders future stores. See the comment on top.
+ *
+ * Use of this function is not recommended for the normal reference counting
+ * use case in which references are taken and released one at a time.  In these
+ * cases, refcount_inc(), or one of its variants, should instead be used to
+ * increment a reference count.
+ *
+ * Return: false if the passed refcount is 0, true otherwise
+ */
 static inline __must_check bool refcount_add_not_zero(int i, refcount_t *r)
 {
 	return __refcount_add_not_zero(i, r, NULL);
 }
 
+static inline void __refcount_add(int i, refcount_t *r, int *oldp)
+{
+	int old = atomic_fetch_add_relaxed(i, &r->refs);
+
+	if (oldp)
+		*oldp = old;
+
+	if (unlikely(!old))
+		refcount_warn_saturate(r, REFCOUNT_ADD_UAF);
+	else if (unlikely(old < 0 || old + i < 0))
+		refcount_warn_saturate(r, REFCOUNT_ADD_OVF);
+}
+
 /**
  * refcount_add - add a value to a refcount
  * @i: the value to add to the refcount
@@ -204,24 +217,16 @@ static inline __must_check bool refcount_add_not_zero(int i, refcount_t *r)
  * cases, refcount_inc(), or one of its variants, should instead be used to
  * increment a reference count.
  */
-static inline void __refcount_add(int i, refcount_t *r, int *oldp)
-{
-	int old = atomic_fetch_add_relaxed(i, &r->refs);
-
-	if (oldp)
-		*oldp = old;
-
-	if (unlikely(!old))
-		refcount_warn_saturate(r, REFCOUNT_ADD_UAF);
-	else if (unlikely(old < 0 || old + i < 0))
-		refcount_warn_saturate(r, REFCOUNT_ADD_OVF);
-}
-
 static inline void refcount_add(int i, refcount_t *r)
 {
 	__refcount_add(i, r, NULL);
 }
 
+static inline __must_check bool __refcount_inc_not_zero(refcount_t *r, int *oldp)
+{
+	return __refcount_add_not_zero(1, r, oldp);
+}
+
 /**
  * refcount_inc_not_zero - increment a refcount unless it is 0
  * @r: the refcount to increment
@@ -235,16 +240,16 @@ static inline void refcount_add(int i, refcount_t *r)
  *
  * Return: true if the increment was successful, false otherwise
  */
-static inline __must_check bool __refcount_inc_not_zero(refcount_t *r, int *oldp)
-{
-	return __refcount_add_not_zero(1, r, oldp);
-}
-
 static inline __must_check bool refcount_inc_not_zero(refcount_t *r)
 {
 	return __refcount_inc_not_zero(r, NULL);
 }
 
+static inline void __refcount_inc(refcount_t *r, int *oldp)
+{
+	__refcount_add(1, r, oldp);
+}
+
 /**
  * refcount_inc - increment a refcount
  * @r: the refcount to increment
@@ -257,16 +262,29 @@ static inline __must_check bool refcount_inc_not_zero(refcount_t *r)
  * Will WARN if the refcount is 0, as this represents a possible use-after-free
  * condition.
  */
-static inline void __refcount_inc(refcount_t *r, int *oldp)
-{
-	__refcount_add(1, r, oldp);
-}
-
 static inline void refcount_inc(refcount_t *r)
 {
 	__refcount_inc(r, NULL);
 }
 
+static inline __must_check bool __refcount_sub_and_test(int i, refcount_t *r, int *oldp)
+{
+	int old = atomic_fetch_sub_release(i, &r->refs);
+
+	if (oldp)
+		*oldp = old;
+
+	if (old == i) {
+		smp_acquire__after_ctrl_dep();
+		return true;
+	}
+
+	if (unlikely(old < 0 || old - i < 0))
+		refcount_warn_saturate(r, REFCOUNT_SUB_UAF);
+
+	return false;
+}
+
 /**
  * refcount_sub_and_test - subtract from a refcount and test if it is 0
  * @i: amount to subtract from the refcount
@@ -287,29 +305,16 @@ static inline void refcount_inc(refcount_t *r)
  *
  * Return: true if the resulting refcount is 0, false otherwise
  */
-static inline __must_check bool __refcount_sub_and_test(int i, refcount_t *r, int *oldp)
-{
-	int old = atomic_fetch_sub_release(i, &r->refs);
-
-	if (oldp)
-		*oldp = old;
-
-	if (old == i) {
-		smp_acquire__after_ctrl_dep();
-		return true;
-	}
-
-	if (unlikely(old < 0 || old - i < 0))
-		refcount_warn_saturate(r, REFCOUNT_SUB_UAF);
-
-	return false;
-}
-
 static inline __must_check bool refcount_sub_and_test(int i, refcount_t *r)
 {
 	return __refcount_sub_and_test(i, r, NULL);
 }
 
+static inline __must_check bool __refcount_dec_and_test(refcount_t *r, int *oldp)
+{
+	return __refcount_sub_and_test(1, r, oldp);
+}
+
 /**
  * refcount_dec_and_test - decrement a refcount and test if it is 0
  * @r: the refcount
@@ -323,16 +328,22 @@ static inline __must_check bool refcount_sub_and_test(int i, refcount_t *r)
  *
  * Return: true if the resulting refcount is 0, false otherwise
  */
-static inline __must_check bool __refcount_dec_and_test(refcount_t *r, int *oldp)
-{
-	return __refcount_sub_and_test(1, r, oldp);
-}
-
 static inline __must_check bool refcount_dec_and_test(refcount_t *r)
 {
 	return __refcount_dec_and_test(r, NULL);
 }
 
+static inline void __refcount_dec(refcount_t *r, int *oldp)
+{
+	int old = atomic_fetch_sub_release(1, &r->refs);
+
+	if (oldp)
+		*oldp = old;
+
+	if (unlikely(old <= 1))
+		refcount_warn_saturate(r, REFCOUNT_DEC_LEAK);
+}
+
 /**
  * refcount_dec - decrement a refcount
  * @r: the refcount
@@ -343,17 +354,6 @@ static inline __must_check bool refcount_dec_and_test(refcount_t *r)
  * Provides release memory ordering, such that prior loads and stores are done
  * before.
  */
-static inline void __refcount_dec(refcount_t *r, int *oldp)
-{
-	int old = atomic_fetch_sub_release(1, &r->refs);
-
-	if (oldp)
-		*oldp = old;
-
-	if (unlikely(old <= 1))
-		refcount_warn_saturate(r, REFCOUNT_DEC_LEAK);
-}
-
 static inline void refcount_dec(refcount_t *r)
 {
 	__refcount_dec(r, NULL);

kernel/hung_task.c

@@ -225,8 +225,7 @@ static long hung_timeout_jiffies(unsigned long last_checked,
  * Process updating of timeout sysctl
  */
 int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
-				  void __user *buffer,
+				  void *buffer, size_t *lenp, loff_t *ppos)
-				  size_t *lenp, loff_t *ppos)
 {
 	int ret;
 

kernel/kthread.c

@@ -897,6 +897,7 @@ void kthread_delayed_work_timer_fn(struct timer_list *t)
 	/* Move the work from worker->delayed_work_list. */
 	WARN_ON_ONCE(list_empty(&work->node));
 	list_del_init(&work->node);
+	if (!work->canceling)
 		kthread_insert_work(worker, work, &worker->work_list);
 
 	raw_spin_unlock_irqrestore(&worker->lock, flags);

kernel/signal.c

@@ -391,16 +391,17 @@ static bool task_participate_group_stop(struct task_struct *task)
 
 void task_join_group_stop(struct task_struct *task)
 {
-	/* Have the new thread join an on-going signal group stop */
+	unsigned long mask = current->jobctl & JOBCTL_STOP_SIGMASK;
-	unsigned long jobctl = current->jobctl;
-	if (jobctl & JOBCTL_STOP_PENDING) {
 	struct signal_struct *sig = current->signal;
-		unsigned long signr = jobctl & JOBCTL_STOP_SIGMASK;
+
-		unsigned long gstop = JOBCTL_STOP_PENDING | JOBCTL_STOP_CONSUME;
+	if (sig->group_stop_count) {
-		if (task_set_jobctl_pending(task, signr | gstop)) {
 		sig->group_stop_count++;
-		}
+		mask |= JOBCTL_STOP_CONSUME;
-	}
+	} else if (!(sig->flags & SIGNAL_STOP_STOPPED))
+		return;
+
+	/* Have the new thread join an on-going signal group stop */
+	task_set_jobctl_pending(task, mask | JOBCTL_STOP_PENDING);
 }
 
 /*

lib/crc32test.c

@@ -683,7 +683,6 @@ static int __init crc32c_test(void)
 
 	/* reduce OS noise */
 	local_irq_save(flags);
-	local_irq_disable();
 
 	nsec = ktime_get_ns();
 	for (i = 0; i < 100; i++) {
@@ -694,7 +693,6 @@ static int __init crc32c_test(void)
 	nsec = ktime_get_ns() - nsec;
 
 	local_irq_restore(flags);
-	local_irq_enable();
 
 	pr_info("crc32c: CRC_LE_BITS = %d\n", CRC_LE_BITS);
 
@@ -768,7 +766,6 @@ static int __init crc32_test(void)
 
 	/* reduce OS noise */
 	local_irq_save(flags);
-	local_irq_disable();
 
 	nsec = ktime_get_ns();
 	for (i = 0; i < 100; i++) {
@@ -783,7 +780,6 @@ static int __init crc32_test(void)
 	nsec = ktime_get_ns() - nsec;
 
 	local_irq_restore(flags);
-	local_irq_enable();
 
 	pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n",
 		 CRC_LE_BITS, CRC_BE_BITS);

lib/test_kasan.c

@@ -216,6 +216,12 @@ static void kmalloc_oob_16(struct kunit *test)
 		u64 words[2];
 	} *ptr1, *ptr2;
 
+	/* This test is specifically crafted for the generic mode. */
+	if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+		kunit_info(test, "CONFIG_KASAN_GENERIC required\n");
+		return;
+	}
+
 	ptr1 = kmalloc(sizeof(*ptr1) - 3, GFP_KERNEL);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
 
@@ -227,6 +233,23 @@ static void kmalloc_oob_16(struct kunit *test)
 	kfree(ptr2);
 }
 
+static void kmalloc_uaf_16(struct kunit *test)
+{
+	struct {
+		u64 words[2];
+	} *ptr1, *ptr2;
+
+	ptr1 = kmalloc(sizeof(*ptr1), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
+
+	ptr2 = kmalloc(sizeof(*ptr2), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
+	kfree(ptr2);
+
+	KUNIT_EXPECT_KASAN_FAIL(test, *ptr1 = *ptr2);
+	kfree(ptr1);
+}
+
 static void kmalloc_oob_memset_2(struct kunit *test)
 {
 	char *ptr;
@@ -429,6 +452,12 @@ static void kasan_global_oob(struct kunit *test)
 	volatile int i = 3;
 	char *p = &global_array[ARRAY_SIZE(global_array) + i];
 
+	/* Only generic mode instruments globals. */
+	if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+		kunit_info(test, "CONFIG_KASAN_GENERIC required");
+		return;
+	}
+
 	KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
 }
 
@@ -467,6 +496,12 @@ static void kasan_alloca_oob_left(struct kunit *test)
 	char alloca_array[i];
 	char *p = alloca_array - 1;
 
+	/* Only generic mode instruments dynamic allocas. */
+	if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+		kunit_info(test, "CONFIG_KASAN_GENERIC required");
+		return;
+	}
+
 	if (!IS_ENABLED(CONFIG_KASAN_STACK)) {
 		kunit_info(test, "CONFIG_KASAN_STACK is not enabled");
 		return;
@@ -481,6 +516,12 @@ static void kasan_alloca_oob_right(struct kunit *test)
 	char alloca_array[i];
 	char *p = alloca_array + i;
 
+	/* Only generic mode instruments dynamic allocas. */
+	if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+		kunit_info(test, "CONFIG_KASAN_GENERIC required");
+		return;
+	}
+
 	if (!IS_ENABLED(CONFIG_KASAN_STACK)) {
 		kunit_info(test, "CONFIG_KASAN_STACK is not enabled");
 		return;
@@ -551,6 +592,9 @@ static void kasan_memchr(struct kunit *test)
 		return;
 	}
 
+	if (OOB_TAG_OFF)
+		size = round_up(size, OOB_TAG_OFF);
+
 	ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
 
@@ -573,6 +617,9 @@ static void kasan_memcmp(struct kunit *test)
 		return;
 	}
 
+	if (OOB_TAG_OFF)
+		size = round_up(size, OOB_TAG_OFF);
+
 	ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
 	memset(arr, 0, sizeof(arr));
@@ -619,13 +666,50 @@ static void kasan_strings(struct kunit *test)
 	KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strnlen(ptr, 1));
 }
 
-static void kasan_bitops(struct kunit *test)
+static void kasan_bitops_modify(struct kunit *test, int nr, void *addr)
 {
+	KUNIT_EXPECT_KASAN_FAIL(test, set_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, __set_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, clear_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, clear_bit_unlock(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit_unlock(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, change_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, __change_bit(nr, addr));
+}
+
+static void kasan_bitops_test_and_modify(struct kunit *test, int nr, void *addr)
+{
+	KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, __test_and_set_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit_lock(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, test_and_clear_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, __test_and_clear_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, test_and_change_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, __test_and_change_bit(nr, addr));
+	KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = test_bit(nr, addr));
+
+#if defined(clear_bit_unlock_is_negative_byte)
+	KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result =
+				clear_bit_unlock_is_negative_byte(nr, addr));
+#endif
+}
+
+static void kasan_bitops_generic(struct kunit *test)
+{
+	long *bits;
+
+	/* This test is specifically crafted for the generic mode. */
+	if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+		kunit_info(test, "CONFIG_KASAN_GENERIC required\n");
+		return;
+	}
+
 	/*
 	 * Allocate 1 more byte, which causes kzalloc to round up to 16-bytes;
 	 * this way we do not actually corrupt other memory.
 	 */
-	long *bits = kzalloc(sizeof(*bits) + 1, GFP_KERNEL);
+	bits = kzalloc(sizeof(*bits) + 1, GFP_KERNEL);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
 
 	/*
@@ -633,55 +717,34 @@ static void kasan_bitops(struct kunit *test)
 	 * below accesses are still out-of-bounds, since bitops are defined to
 	 * operate on the whole long the bit is in.
 	 */
-	KUNIT_EXPECT_KASAN_FAIL(test, set_bit(BITS_PER_LONG, bits));
+	kasan_bitops_modify(test, BITS_PER_LONG, bits);
-
-	KUNIT_EXPECT_KASAN_FAIL(test, __set_bit(BITS_PER_LONG, bits));
-
-	KUNIT_EXPECT_KASAN_FAIL(test, clear_bit(BITS_PER_LONG, bits));
-
-	KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit(BITS_PER_LONG, bits));
-
-	KUNIT_EXPECT_KASAN_FAIL(test, clear_bit_unlock(BITS_PER_LONG, bits));
-
-	KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit_unlock(BITS_PER_LONG, bits));
-
-	KUNIT_EXPECT_KASAN_FAIL(test, change_bit(BITS_PER_LONG, bits));
-
-	KUNIT_EXPECT_KASAN_FAIL(test, __change_bit(BITS_PER_LONG, bits));
 
 	/*
 	 * Below calls try to access bit beyond allocated memory.
 	 */
-	KUNIT_EXPECT_KASAN_FAIL(test,
+	kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, bits);
-		test_and_set_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
 
-	KUNIT_EXPECT_KASAN_FAIL(test,
+	kfree(bits);
-		__test_and_set_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+}
 
-	KUNIT_EXPECT_KASAN_FAIL(test,
+static void kasan_bitops_tags(struct kunit *test)
-		test_and_set_bit_lock(BITS_PER_LONG + BITS_PER_BYTE, bits));
+{
+	long *bits;
 
-	KUNIT_EXPECT_KASAN_FAIL(test,
+	/* This test is specifically crafted for the tag-based mode. */
-		test_and_clear_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+	if (IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+		kunit_info(test, "CONFIG_KASAN_SW_TAGS required\n");
+		return;
+	}
 
-	KUNIT_EXPECT_KASAN_FAIL(test,
+	/* Allocation size will be rounded to up granule size, which is 16. */
-		__test_and_clear_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+	bits = kzalloc(sizeof(*bits), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
 
-	KUNIT_EXPECT_KASAN_FAIL(test,
+	/* Do the accesses past the 16 allocated bytes. */
-		test_and_change_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
+	kasan_bitops_modify(test, BITS_PER_LONG, &bits[1]);
+	kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, &bits[1]);
 
-	KUNIT_EXPECT_KASAN_FAIL(test,
-		__test_and_change_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
-
-	KUNIT_EXPECT_KASAN_FAIL(test,
-		kasan_int_result =
-			test_bit(BITS_PER_LONG + BITS_PER_BYTE, bits));
-
-#if defined(clear_bit_unlock_is_negative_byte)
-	KUNIT_EXPECT_KASAN_FAIL(test,
-		kasan_int_result = clear_bit_unlock_is_negative_byte(
-			BITS_PER_LONG + BITS_PER_BYTE, bits));
-#endif
 	kfree(bits);
 }
 
@@ -728,6 +791,7 @@ static struct kunit_case kasan_kunit_test_cases[] = {
 	KUNIT_CASE(kmalloc_oob_krealloc_more),
 	KUNIT_CASE(kmalloc_oob_krealloc_less),
 	KUNIT_CASE(kmalloc_oob_16),
+	KUNIT_CASE(kmalloc_uaf_16),
 	KUNIT_CASE(kmalloc_oob_in_memset),
 	KUNIT_CASE(kmalloc_oob_memset_2),
 	KUNIT_CASE(kmalloc_oob_memset_4),
@@ -751,7 +815,8 @@ static struct kunit_case kasan_kunit_test_cases[] = {
 	KUNIT_CASE(kasan_memchr),
 	KUNIT_CASE(kasan_memcmp),
 	KUNIT_CASE(kasan_strings),
-	KUNIT_CASE(kasan_bitops),
+	KUNIT_CASE(kasan_bitops_generic),
+	KUNIT_CASE(kasan_bitops_tags),
 	KUNIT_CASE(kmalloc_double_kzfree),
 	KUNIT_CASE(vmalloc_oob),
 	{}

mm/hugetlb.c

@@ -648,6 +648,8 @@ retry:
 			}
 
 			del += t - f;
+			hugetlb_cgroup_uncharge_file_region(
+				resv, rg, t - f);
 
 			/* New entry for end of split region */
 			nrg->from = t;
@@ -660,9 +662,6 @@ retry:
 			/* Original entry is trimmed */
 			rg->to = f;
 
-			hugetlb_cgroup_uncharge_file_region(
-				resv, rg, nrg->to - nrg->from);
-
 			list_add(&nrg->link, &rg->link);
 			nrg = NULL;
 			break;
@@ -678,17 +677,17 @@ retry:
 		}
 
 		if (f <= rg->from) {	/* Trim beginning of region */
-			del += t - rg->from;
-			rg->from = t;
-
 			hugetlb_cgroup_uncharge_file_region(resv, rg,
 							    t - rg->from);
-		} else {		/* Trim end of region */
-			del += rg->to - f;
-			rg->to = f;
 
+			del += t - rg->from;
+			rg->from = t;
+		} else {		/* Trim end of region */
 			hugetlb_cgroup_uncharge_file_region(resv, rg,
 							    rg->to - f);
+
+			del += rg->to - f;
+			rg->to = f;
 		}
 	}
 
@@ -2443,6 +2442,9 @@ struct page *alloc_huge_page(struct vm_area_struct *vma,
 
 		rsv_adjust = hugepage_subpool_put_pages(spool, 1);
 		hugetlb_acct_memory(h, -rsv_adjust);
+		if (deferred_reserve)
+			hugetlb_cgroup_uncharge_page_rsvd(hstate_index(h),
+					pages_per_huge_page(h), page);
 	}
 	return page;
 

mm/memcontrol.c

@@ -4110,11 +4110,17 @@ static int memcg_stat_show(struct seq_file *m, void *v)
 			   (u64)memsw * PAGE_SIZE);
 
 	for (i = 0; i < ARRAY_SIZE(memcg1_stats); i++) {
+		unsigned long nr;
+
 		if (memcg1_stats[i] == MEMCG_SWAP && !do_memsw_account())
 			continue;
+		nr = memcg_page_state(memcg, memcg1_stats[i]);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+		if (memcg1_stats[i] == NR_ANON_THPS)
+			nr *= HPAGE_PMD_NR;
+#endif
 		seq_printf(m, "total_%s %llu\n", memcg1_stat_names[i],
-			   (u64)memcg_page_state(memcg, memcg1_stats[i]) *
+						(u64)nr * PAGE_SIZE);
-			   PAGE_SIZE);
 	}
 
 	for (i = 0; i < ARRAY_SIZE(memcg1_events); i++)
@@ -5339,17 +5345,22 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
 		memcg->swappiness = mem_cgroup_swappiness(parent);
 		memcg->oom_kill_disable = parent->oom_kill_disable;
 	}
-	if (parent && parent->use_hierarchy) {
+	if (!parent) {
+		page_counter_init(&memcg->memory, NULL);
+		page_counter_init(&memcg->swap, NULL);
+		page_counter_init(&memcg->kmem, NULL);
+		page_counter_init(&memcg->tcpmem, NULL);
+	} else if (parent->use_hierarchy) {
 		memcg->use_hierarchy = true;
 		page_counter_init(&memcg->memory, &parent->memory);
 		page_counter_init(&memcg->swap, &parent->swap);
 		page_counter_init(&memcg->kmem, &parent->kmem);
 		page_counter_init(&memcg->tcpmem, &parent->tcpmem);
 	} else {
-		page_counter_init(&memcg->memory, NULL);
+		page_counter_init(&memcg->memory, &root_mem_cgroup->memory);
-		page_counter_init(&memcg->swap, NULL);
+		page_counter_init(&memcg->swap, &root_mem_cgroup->swap);
-		page_counter_init(&memcg->kmem, NULL);
+		page_counter_init(&memcg->kmem, &root_mem_cgroup->kmem);
-		page_counter_init(&memcg->tcpmem, NULL);
+		page_counter_init(&memcg->tcpmem, &root_mem_cgroup->tcpmem);
 		/*
 		 * Deeper hierachy with use_hierarchy == false doesn't make
 		 * much sense so let cgroup subsystem know about this

mm/mempolicy.c

@@ -525,7 +525,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 	unsigned long flags = qp->flags;
 	int ret;
 	bool has_unmovable = false;
-	pte_t *pte;
+	pte_t *pte, *mapped_pte;
 	spinlock_t *ptl;
 
 	ptl = pmd_trans_huge_lock(pmd, vma);
@@ -539,7 +539,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 	if (pmd_trans_unstable(pmd))
 		return 0;
 
-	pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+	mapped_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
 	for (; addr != end; pte++, addr += PAGE_SIZE) {
 		if (!pte_present(*pte))
 			continue;
@@ -571,7 +571,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 		} else
 			break;
 	}
-	pte_unmap_unlock(pte - 1, ptl);
+	pte_unmap_unlock(mapped_pte, ptl);
 	cond_resched();
 
 	if (has_unmovable)

mm/memremap.c

@@ -41,28 +41,24 @@ EXPORT_SYMBOL_GPL(memremap_compat_align);
 DEFINE_STATIC_KEY_FALSE(devmap_managed_key);
 EXPORT_SYMBOL(devmap_managed_key);
 
-static void devmap_managed_enable_put(void)
+static void devmap_managed_enable_put(struct dev_pagemap *pgmap)
 {
+	if (pgmap->type == MEMORY_DEVICE_PRIVATE ||
+	    pgmap->type == MEMORY_DEVICE_FS_DAX)
 		static_branch_dec(&devmap_managed_key);
 }
 
-static int devmap_managed_enable_get(struct dev_pagemap *pgmap)
+static void devmap_managed_enable_get(struct dev_pagemap *pgmap)
 {
-	if (pgmap->type == MEMORY_DEVICE_PRIVATE &&
+	if (pgmap->type == MEMORY_DEVICE_PRIVATE ||
-	    (!pgmap->ops || !pgmap->ops->page_free)) {
+	    pgmap->type == MEMORY_DEVICE_FS_DAX)
-		WARN(1, "Missing page_free method\n");
-		return -EINVAL;
-	}
-
 		static_branch_inc(&devmap_managed_key);
-	return 0;
 }
 #else
-static int devmap_managed_enable_get(struct dev_pagemap *pgmap)
+static void devmap_managed_enable_get(struct dev_pagemap *pgmap)
 {
-	return -EINVAL;
 }
-static void devmap_managed_enable_put(void)
+static void devmap_managed_enable_put(struct dev_pagemap *pgmap)
 {
 }
 #endif /* CONFIG_DEV_PAGEMAP_OPS */
@@ -169,7 +165,7 @@ void memunmap_pages(struct dev_pagemap *pgmap)
 		pageunmap_range(pgmap, i);
 
 	WARN_ONCE(pgmap->altmap.alloc, "failed to free all reserved pages\n");
-	devmap_managed_enable_put();
+	devmap_managed_enable_put(pgmap);
 }
 EXPORT_SYMBOL_GPL(memunmap_pages);
 
@@ -307,7 +303,6 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
 		.pgprot = PAGE_KERNEL,
 	};
 	const int nr_range = pgmap->nr_range;
-	bool need_devmap_managed = true;
 	int error, i;
 
 	if (WARN_ONCE(!nr_range, "nr_range must be specified\n"))
@@ -323,6 +318,10 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
 			WARN(1, "Missing migrate_to_ram method\n");
 			return ERR_PTR(-EINVAL);
 		}
+		if (!pgmap->ops->page_free) {
+			WARN(1, "Missing page_free method\n");
+			return ERR_PTR(-EINVAL);
+		}
 		if (!pgmap->owner) {
 			WARN(1, "Missing owner\n");
 			return ERR_PTR(-EINVAL);
@@ -336,11 +335,9 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
 		}
 		break;
 	case MEMORY_DEVICE_GENERIC:
-		need_devmap_managed = false;
 		break;
 	case MEMORY_DEVICE_PCI_P2PDMA:
 		params.pgprot = pgprot_noncached(params.pgprot);
-		need_devmap_managed = false;
 		break;
 	default:
 		WARN(1, "Invalid pgmap type %d\n", pgmap->type);
@@ -364,11 +361,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
 		}
 	}
 
-	if (need_devmap_managed) {
+	devmap_managed_enable_get(pgmap);
-		error = devmap_managed_enable_get(pgmap);
-		if (error)
-			return ERR_PTR(error);
-	}
 
 	/*
 	 * Clear the pgmap nr_range as it will be incremented for each

mm/truncate.c

@@ -528,7 +528,7 @@ void truncate_inode_pages_final(struct address_space *mapping)
 }
 EXPORT_SYMBOL(truncate_inode_pages_final);
 
-unsigned long __invalidate_mapping_pages(struct address_space *mapping,
+static unsigned long __invalidate_mapping_pages(struct address_space *mapping,
 		pgoff_t start, pgoff_t end, unsigned long *nr_pagevec)
 {
 	pgoff_t indices[PAGEVEC_SIZE];

scripts/kernel-doc

@@ -1092,8 +1092,12 @@ sub output_struct_rst(%) {
 	print "\n\n.. c:type:: " . $name . "\n\n";
     } else {
 	my $name = $args{'struct'};
+	if ($args{'type'} eq 'union') {
+	    print "\n\n.. c:union:: " . $name . "\n\n";
+	} else {
 	    print "\n\n.. c:struct:: " . $name . "\n\n";
 	}
+    }
     print_lineno($declaration_start_line);
     $lineprefix = "   ";
     output_highlight_rst($args{'purpose'});
@@ -1427,20 +1431,25 @@ sub dump_enum($$) {
     }
 }
 
+my $typedef_type = qr { ((?:\s+[\w\*]+){1,8})\s* }x;
+my $typedef_ident = qr { \*?\s*(\w\S+)\s* }x;
+my $typedef_args = qr { \s*\((.*)\); }x;
+
+my $typedef1 = qr { typedef$typedef_type\($typedef_ident\)$typedef_args }x;
+my $typedef2 = qr { typedef$typedef_type$typedef_ident$typedef_args }x;
+
 sub dump_typedef($$) {
     my $x = shift;
     my $file = shift;
 
     $x =~ s@/\*.*?\*/@@gos;	# strip comments.
 
-    # Parse function prototypes
+    # Parse function typedef prototypes
-    if ($x =~ /typedef\s+(\w+)\s*\(\*\s*(\w\S+)\s*\)\s*\((.*)\);/ ||
+    if ($x =~ $typedef1 || $x =~ $typedef2) {
-	$x =~ /typedef\s+(\w+)\s*(\w\S+)\s*\s*\((.*)\);/) {
-
-	# Function typedefs
 	$return_type = $1;
 	$declaration_name = $2;
 	my $args = $3;
+	$return_type =~ s/^\s+//;
 
 	create_parameterlist($args, ',', $file, $declaration_name);
 

tools/arch/arm64/include/uapi/asm/kvm.h

@@ -159,6 +159,21 @@ struct kvm_sync_regs {
 struct kvm_arch_memory_slot {
 };
 
+/*
+ * PMU filter structure. Describe a range of events with a particular
+ * action. To be used with KVM_ARM_VCPU_PMU_V3_FILTER.
+ */
+struct kvm_pmu_event_filter {
+	__u16	base_event;
+	__u16	nevents;
+
+#define KVM_PMU_EVENT_ALLOW	0
+#define KVM_PMU_EVENT_DENY	1
+
+	__u8	action;
+	__u8	pad[3];
+};
+
 /* for KVM_GET/SET_VCPU_EVENTS */
 struct kvm_vcpu_events {
 	struct {
@@ -242,6 +257,15 @@ struct kvm_vcpu_events {
 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_AVAIL		0
 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_AVAIL		1
 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_REQUIRED	2
+
+/*
+ * Only two states can be presented by the host kernel:
+ * - NOT_REQUIRED: the guest doesn't need to do anything
+ * - NOT_AVAIL: the guest isn't mitigated (it can still use SSBS if available)
+ *
+ * All the other values are deprecated. The host still accepts all
+ * values (they are ABI), but will narrow them to the above two.
+ */
 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2	KVM_REG_ARM_FW_REG(2)
 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_AVAIL		0
 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_UNKNOWN		1
@@ -329,6 +353,7 @@ struct kvm_vcpu_events {
 #define KVM_ARM_VCPU_PMU_V3_CTRL	0
 #define   KVM_ARM_VCPU_PMU_V3_IRQ	0
 #define   KVM_ARM_VCPU_PMU_V3_INIT	1
+#define   KVM_ARM_VCPU_PMU_V3_FILTER	2
 #define KVM_ARM_VCPU_TIMER_CTRL		1
 #define   KVM_ARM_VCPU_TIMER_IRQ_VTIMER		0
 #define   KVM_ARM_VCPU_TIMER_IRQ_PTIMER		1

tools/arch/s390/include/uapi/asm/sie.h

@@ -29,7 +29,7 @@
 	{ 0x13, "SIGP conditional emergency signal" },		\
 	{ 0x15, "SIGP sense running" },				\
 	{ 0x16, "SIGP set multithreading"},			\
-	{ 0x17, "SIGP store additional status ait address"}
+	{ 0x17, "SIGP store additional status at address"}
 
 #define icpt_prog_codes						\
 	{ 0x0001, "Prog Operation" },				\

tools/arch/x86/include/asm/cpufeatures.h

@@ -96,7 +96,7 @@
 #define X86_FEATURE_SYSCALL32		( 3*32+14) /* "" syscall in IA32 userspace */
 #define X86_FEATURE_SYSENTER32		( 3*32+15) /* "" sysenter in IA32 userspace */
 #define X86_FEATURE_REP_GOOD		( 3*32+16) /* REP microcode works well */
-/* free					( 3*32+17) */
+#define X86_FEATURE_SME_COHERENT	( 3*32+17) /* "" AMD hardware-enforced cache coherency */
 #define X86_FEATURE_LFENCE_RDTSC	( 3*32+18) /* "" LFENCE synchronizes RDTSC */
 #define X86_FEATURE_ACC_POWER		( 3*32+19) /* AMD Accumulated Power Mechanism */
 #define X86_FEATURE_NOPL		( 3*32+20) /* The NOPL (0F 1F) instructions */
@@ -236,6 +236,7 @@
 #define X86_FEATURE_EPT_AD		( 8*32+17) /* Intel Extended Page Table access-dirty bit */
 #define X86_FEATURE_VMCALL		( 8*32+18) /* "" Hypervisor supports the VMCALL instruction */
 #define X86_FEATURE_VMW_VMMCALL		( 8*32+19) /* "" VMware prefers VMMCALL hypercall instruction */
+#define X86_FEATURE_SEV_ES		( 8*32+20) /* AMD Secure Encrypted Virtualization - Encrypted State */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (EBX), word 9 */
 #define X86_FEATURE_FSGSBASE		( 9*32+ 0) /* RDFSBASE, WRFSBASE, RDGSBASE, WRGSBASE instructions*/
@@ -288,6 +289,7 @@
 #define X86_FEATURE_FENCE_SWAPGS_USER	(11*32+ 4) /* "" LFENCE in user entry SWAPGS path */
 #define X86_FEATURE_FENCE_SWAPGS_KERNEL	(11*32+ 5) /* "" LFENCE in kernel entry SWAPGS path */
 #define X86_FEATURE_SPLIT_LOCK_DETECT	(11*32+ 6) /* #AC for split lock */
+#define X86_FEATURE_PER_THREAD_MBA	(11*32+ 7) /* "" Per-thread Memory Bandwidth Allocation */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */
 #define X86_FEATURE_AVX512_BF16		(12*32+ 5) /* AVX512 BFLOAT16 instructions */
@@ -353,6 +355,7 @@
 #define X86_FEATURE_CLDEMOTE		(16*32+25) /* CLDEMOTE instruction */
 #define X86_FEATURE_MOVDIRI		(16*32+27) /* MOVDIRI instruction */
 #define X86_FEATURE_MOVDIR64B		(16*32+28) /* MOVDIR64B instruction */
+#define X86_FEATURE_ENQCMD		(16*32+29) /* ENQCMD and ENQCMDS instructions */
 
 /* AMD-defined CPU features, CPUID level 0x80000007 (EBX), word 17 */
 #define X86_FEATURE_OVERFLOW_RECOV	(17*32+ 0) /* MCA overflow recovery support */
@@ -368,6 +371,7 @@
 #define X86_FEATURE_MD_CLEAR		(18*32+10) /* VERW clears CPU buffers */
 #define X86_FEATURE_TSX_FORCE_ABORT	(18*32+13) /* "" TSX_FORCE_ABORT */
 #define X86_FEATURE_SERIALIZE		(18*32+14) /* SERIALIZE instruction */
+#define X86_FEATURE_TSXLDTRK		(18*32+16) /* TSX Suspend Load Address Tracking */
 #define X86_FEATURE_PCONFIG		(18*32+18) /* Intel PCONFIG */
 #define X86_FEATURE_ARCH_LBR		(18*32+19) /* Intel ARCH LBR */
 #define X86_FEATURE_SPEC_CTRL		(18*32+26) /* "" Speculation Control (IBRS + IBPB) */

tools/arch/x86/include/asm/disabled-features.h

@@ -56,6 +56,12 @@
 # define DISABLE_PTI		(1 << (X86_FEATURE_PTI & 31))
 #endif
 
+#ifdef CONFIG_IOMMU_SUPPORT
+# define DISABLE_ENQCMD	0
+#else
+# define DISABLE_ENQCMD (1 << (X86_FEATURE_ENQCMD & 31))
+#endif
+
 /*
  * Make sure to add features to the correct mask
  */
@@ -75,7 +81,8 @@
 #define DISABLED_MASK13	0
 #define DISABLED_MASK14	0
 #define DISABLED_MASK15	0
-#define DISABLED_MASK16	(DISABLE_PKU|DISABLE_OSPKE|DISABLE_LA57|DISABLE_UMIP)
+#define DISABLED_MASK16	(DISABLE_PKU|DISABLE_OSPKE|DISABLE_LA57|DISABLE_UMIP| \
+			 DISABLE_ENQCMD)
 #define DISABLED_MASK17	0
 #define DISABLED_MASK18	0
 #define DISABLED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 19)

tools/arch/x86/include/asm/msr-index.h

@@ -257,6 +257,9 @@
 #define MSR_IA32_LASTINTFROMIP		0x000001dd
 #define MSR_IA32_LASTINTTOIP		0x000001de
 
+#define MSR_IA32_PASID			0x00000d93
+#define MSR_IA32_PASID_VALID		BIT_ULL(31)
+
 /* DEBUGCTLMSR bits (others vary by model): */
 #define DEBUGCTLMSR_LBR			(1UL <<  0) /* last branch recording */
 #define DEBUGCTLMSR_BTF_SHIFT		1
@@ -464,11 +467,15 @@
 #define MSR_AMD64_IBSOP_REG_MASK	((1UL<<MSR_AMD64_IBSOP_REG_COUNT)-1)
 #define MSR_AMD64_IBSCTL		0xc001103a
 #define MSR_AMD64_IBSBRTARGET		0xc001103b
+#define MSR_AMD64_ICIBSEXTDCTL		0xc001103c
 #define MSR_AMD64_IBSOPDATA4		0xc001103d
 #define MSR_AMD64_IBS_REG_COUNT_MAX	8 /* includes MSR_AMD64_IBSBRTARGET */
+#define MSR_AMD64_SEV_ES_GHCB		0xc0010130
 #define MSR_AMD64_SEV			0xc0010131
 #define MSR_AMD64_SEV_ENABLED_BIT	0
+#define MSR_AMD64_SEV_ES_ENABLED_BIT	1
 #define MSR_AMD64_SEV_ENABLED		BIT_ULL(MSR_AMD64_SEV_ENABLED_BIT)
+#define MSR_AMD64_SEV_ES_ENABLED	BIT_ULL(MSR_AMD64_SEV_ES_ENABLED_BIT)
 
 #define MSR_AMD64_VIRT_SPEC_CTRL	0xc001011f
 
@@ -857,11 +864,14 @@
 #define MSR_CORE_PERF_FIXED_CTR0	0x00000309
 #define MSR_CORE_PERF_FIXED_CTR1	0x0000030a
 #define MSR_CORE_PERF_FIXED_CTR2	0x0000030b
+#define MSR_CORE_PERF_FIXED_CTR3	0x0000030c
 #define MSR_CORE_PERF_FIXED_CTR_CTRL	0x0000038d
 #define MSR_CORE_PERF_GLOBAL_STATUS	0x0000038e
 #define MSR_CORE_PERF_GLOBAL_CTRL	0x0000038f
 #define MSR_CORE_PERF_GLOBAL_OVF_CTRL	0x00000390
 
+#define MSR_PERF_METRICS		0x00000329
+
 /* PERF_GLOBAL_OVF_CTL bits */
 #define MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT	55
 #define MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI		(1ULL << MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT)

tools/arch/x86/include/asm/required-features.h

@@ -54,7 +54,7 @@
 #endif
 
 #ifdef CONFIG_X86_64
-#ifdef CONFIG_PARAVIRT
+#ifdef CONFIG_PARAVIRT_XXL
 /* Paravirtualized systems may not have PSE or PGE available */
 #define NEED_PSE	0
 #define NEED_PGE	0

tools/arch/x86/include/uapi/asm/kvm.h

@@ -192,6 +192,26 @@ struct kvm_msr_list {
 	__u32 indices[0];
 };
 
+/* Maximum size of any access bitmap in bytes */
+#define KVM_MSR_FILTER_MAX_BITMAP_SIZE 0x600
+
+/* for KVM_X86_SET_MSR_FILTER */
+struct kvm_msr_filter_range {
+#define KVM_MSR_FILTER_READ  (1 << 0)
+#define KVM_MSR_FILTER_WRITE (1 << 1)
+	__u32 flags;
+	__u32 nmsrs; /* number of msrs in bitmap */
+	__u32 base;  /* MSR index the bitmap starts at */
+	__u8 *bitmap; /* a 1 bit allows the operations in flags, 0 denies */
+};
+
+#define KVM_MSR_FILTER_MAX_RANGES 16
+struct kvm_msr_filter {
+#define KVM_MSR_FILTER_DEFAULT_ALLOW (0 << 0)
+#define KVM_MSR_FILTER_DEFAULT_DENY  (1 << 0)
+	__u32 flags;
+	struct kvm_msr_filter_range ranges[KVM_MSR_FILTER_MAX_RANGES];
+};
 
 struct kvm_cpuid_entry {
 	__u32 function;

tools/arch/x86/include/uapi/asm/svm.h

@@ -29,6 +29,7 @@
 #define SVM_EXIT_WRITE_DR6     0x036
 #define SVM_EXIT_WRITE_DR7     0x037
 #define SVM_EXIT_EXCP_BASE     0x040
+#define SVM_EXIT_LAST_EXCP     0x05f
 #define SVM_EXIT_INTR          0x060
 #define SVM_EXIT_NMI           0x061
 #define SVM_EXIT_SMI           0x062
@@ -76,10 +77,21 @@
 #define SVM_EXIT_MWAIT_COND    0x08c
 #define SVM_EXIT_XSETBV        0x08d
 #define SVM_EXIT_RDPRU         0x08e
+#define SVM_EXIT_INVPCID       0x0a2
 #define SVM_EXIT_NPF           0x400
 #define SVM_EXIT_AVIC_INCOMPLETE_IPI		0x401
 #define SVM_EXIT_AVIC_UNACCELERATED_ACCESS	0x402
 
+/* SEV-ES software-defined VMGEXIT events */
+#define SVM_VMGEXIT_MMIO_READ			0x80000001
+#define SVM_VMGEXIT_MMIO_WRITE			0x80000002
+#define SVM_VMGEXIT_NMI_COMPLETE		0x80000003
+#define SVM_VMGEXIT_AP_HLT_LOOP			0x80000004
+#define SVM_VMGEXIT_AP_JUMP_TABLE		0x80000005
+#define SVM_VMGEXIT_SET_AP_JUMP_TABLE		0
+#define SVM_VMGEXIT_GET_AP_JUMP_TABLE		1
+#define SVM_VMGEXIT_UNSUPPORTED_EVENT		0x8000ffff
+
 #define SVM_EXIT_ERR           -1
 
 #define SVM_EXIT_REASONS \
@@ -171,6 +183,7 @@
 	{ SVM_EXIT_MONITOR,     "monitor" }, \
 	{ SVM_EXIT_MWAIT,       "mwait" }, \
 	{ SVM_EXIT_XSETBV,      "xsetbv" }, \
+	{ SVM_EXIT_INVPCID,     "invpcid" }, \
 	{ SVM_EXIT_NPF,         "npf" }, \
 	{ SVM_EXIT_AVIC_INCOMPLETE_IPI,		"avic_incomplete_ipi" }, \
 	{ SVM_EXIT_AVIC_UNACCELERATED_ACCESS,   "avic_unaccelerated_access" }, \

tools/build/feature/test-all.c

@@ -185,7 +185,6 @@ int main(int argc, char *argv[])
 	main_test_libperl();
 	main_test_hello();
 	main_test_libelf();
-	main_test_libelf_mmap();
 	main_test_get_current_dir_name();
 	main_test_gettid();
 	main_test_glibc();

tools/include/linux/compiler-gcc.h

@@ -27,18 +27,6 @@
 #define  __pure		__attribute__((pure))
 #endif
 #define  noinline	__attribute__((noinline))
-#ifdef __has_attribute
-#if __has_attribute(disable_tail_calls)
-#define __no_tail_call	__attribute__((disable_tail_calls))
-#endif
-#endif
-#ifndef __no_tail_call
-#if GCC_VERSION > 40201
-#define __no_tail_call	__attribute__((optimize("no-optimize-sibling-calls")))
-#else
-#define __no_tail_call
-#endif
-#endif
 #ifndef __packed
 #define __packed	__attribute__((packed))
 #endif

tools/include/linux/compiler.h

@@ -47,9 +47,6 @@
 #ifndef noinline
 #define noinline
 #endif
-#ifndef __no_tail_call
-#define __no_tail_call
-#endif
 
 /* Are two types/vars the same type (ignoring qualifiers)? */
 #ifndef __same_type

tools/include/uapi/asm-generic/unistd.h

@@ -857,9 +857,11 @@ __SYSCALL(__NR_openat2, sys_openat2)
 __SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd)
 #define __NR_faccessat2 439
 __SYSCALL(__NR_faccessat2, sys_faccessat2)
+#define __NR_process_madvise 440
+__SYSCALL(__NR_process_madvise, sys_process_madvise)
 
 #undef __NR_syscalls
-#define __NR_syscalls 440
+#define __NR_syscalls 441
 
 /*
  * 32 bit systems traditionally used different

tools/include/uapi/drm/i915_drm.h

@@ -619,6 +619,12 @@ typedef struct drm_i915_irq_wait {
  */
 #define I915_PARAM_PERF_REVISION	54
 
+/* Query whether DRM_I915_GEM_EXECBUFFER2 supports supplying an array of
+ * timeline syncobj through drm_i915_gem_execbuffer_ext_timeline_fences. See
+ * I915_EXEC_USE_EXTENSIONS.
+ */
+#define I915_PARAM_HAS_EXEC_TIMELINE_FENCES 55
+
 /* Must be kept compact -- no holes and well documented */
 
 typedef struct drm_i915_getparam {
@@ -1046,6 +1052,38 @@ struct drm_i915_gem_exec_fence {
 	__u32 flags;
 };
 
+/**
+ * See drm_i915_gem_execbuffer_ext_timeline_fences.
+ */
+#define DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES 0
+
+/**
+ * This structure describes an array of drm_syncobj and associated points for
+ * timeline variants of drm_syncobj. It is invalid to append this structure to
+ * the execbuf if I915_EXEC_FENCE_ARRAY is set.
+ */
+struct drm_i915_gem_execbuffer_ext_timeline_fences {
+	struct i915_user_extension base;
+
+	/**
+	 * Number of element in the handles_ptr & value_ptr arrays.
+	 */
+	__u64 fence_count;
+
+	/**
+	 * Pointer to an array of struct drm_i915_gem_exec_fence of length
+	 * fence_count.
+	 */
+	__u64 handles_ptr;
+
+	/**
+	 * Pointer to an array of u64 values of length fence_count. Values
+	 * must be 0 for a binary drm_syncobj. A Value of 0 for a timeline
+	 * drm_syncobj is invalid as it turns a drm_syncobj into a binary one.
+	 */
+	__u64 values_ptr;
+};
+
 struct drm_i915_gem_execbuffer2 {
 	/**
 	 * List of gem_exec_object2 structs
@@ -1062,8 +1100,14 @@ struct drm_i915_gem_execbuffer2 {
 	__u32 num_cliprects;
 	/**
 	 * This is a struct drm_clip_rect *cliprects if I915_EXEC_FENCE_ARRAY
-	 * is not set.  If I915_EXEC_FENCE_ARRAY is set, then this is a
+	 * & I915_EXEC_USE_EXTENSIONS are not set.
-	 * struct drm_i915_gem_exec_fence *fences.
+	 *
+	 * If I915_EXEC_FENCE_ARRAY is set, then this is a pointer to an array
+	 * of struct drm_i915_gem_exec_fence and num_cliprects is the length
+	 * of the array.
+	 *
+	 * If I915_EXEC_USE_EXTENSIONS is set, then this is a pointer to a
+	 * single struct i915_user_extension and num_cliprects is 0.
 	 */
 	__u64 cliprects_ptr;
 #define I915_EXEC_RING_MASK              (0x3f)
@@ -1181,7 +1225,16 @@ struct drm_i915_gem_execbuffer2 {
  */
 #define I915_EXEC_FENCE_SUBMIT		(1 << 20)
 
-#define __I915_EXEC_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_SUBMIT << 1))
+/*
+ * Setting I915_EXEC_USE_EXTENSIONS implies that
+ * drm_i915_gem_execbuffer2.cliprects_ptr is treated as a pointer to an linked
+ * list of i915_user_extension. Each i915_user_extension node is the base of a
+ * larger structure. The list of supported structures are listed in the
+ * drm_i915_gem_execbuffer_ext enum.
+ */
+#define I915_EXEC_USE_EXTENSIONS	(1 << 21)
+
+#define __I915_EXEC_UNKNOWN_FLAGS (-(I915_EXEC_USE_EXTENSIONS << 1))
 
 #define I915_EXEC_CONTEXT_ID_MASK	(0xffffffff)
 #define i915_execbuffer2_set_context_id(eb2, context) \

tools/include/uapi/linux/fscrypt.h

@@ -45,7 +45,6 @@ struct fscrypt_policy_v1 {
 	__u8 flags;
 	__u8 master_key_descriptor[FSCRYPT_KEY_DESCRIPTOR_SIZE];
 };
-#define fscrypt_policy	fscrypt_policy_v1
 
 /*
  * Process-subscribed "logon" key description prefix and payload format.
@@ -156,9 +155,9 @@ struct fscrypt_get_key_status_arg {
 	__u32 __out_reserved[13];
 };
 
-#define FS_IOC_SET_ENCRYPTION_POLICY		_IOR('f', 19, struct fscrypt_policy)
+#define FS_IOC_SET_ENCRYPTION_POLICY		_IOR('f', 19, struct fscrypt_policy_v1)
 #define FS_IOC_GET_ENCRYPTION_PWSALT		_IOW('f', 20, __u8[16])
-#define FS_IOC_GET_ENCRYPTION_POLICY		_IOW('f', 21, struct fscrypt_policy)
+#define FS_IOC_GET_ENCRYPTION_POLICY		_IOW('f', 21, struct fscrypt_policy_v1)
 #define FS_IOC_GET_ENCRYPTION_POLICY_EX		_IOWR('f', 22, __u8[9]) /* size + version */
 #define FS_IOC_ADD_ENCRYPTION_KEY		_IOWR('f', 23, struct fscrypt_add_key_arg)
 #define FS_IOC_REMOVE_ENCRYPTION_KEY		_IOWR('f', 24, struct fscrypt_remove_key_arg)
@@ -170,6 +169,7 @@ struct fscrypt_get_key_status_arg {
 
 /* old names; don't add anything new here! */
 #ifndef __KERNEL__
+#define fscrypt_policy			fscrypt_policy_v1
 #define FS_KEY_DESCRIPTOR_SIZE		FSCRYPT_KEY_DESCRIPTOR_SIZE
 #define FS_POLICY_FLAGS_PAD_4		FSCRYPT_POLICY_FLAGS_PAD_4
 #define FS_POLICY_FLAGS_PAD_8		FSCRYPT_POLICY_FLAGS_PAD_8

tools/include/uapi/linux/kvm.h

@@ -248,6 +248,8 @@ struct kvm_hyperv_exit {
 #define KVM_EXIT_IOAPIC_EOI       26
 #define KVM_EXIT_HYPERV           27
 #define KVM_EXIT_ARM_NISV         28
+#define KVM_EXIT_X86_RDMSR        29
+#define KVM_EXIT_X86_WRMSR        30
 
 /* For KVM_EXIT_INTERNAL_ERROR */
 /* Emulate instruction failed. */
@@ -413,6 +415,17 @@ struct kvm_run {
 			__u64 esr_iss;
 			__u64 fault_ipa;
 		} arm_nisv;
+		/* KVM_EXIT_X86_RDMSR / KVM_EXIT_X86_WRMSR */
+		struct {
+			__u8 error; /* user -> kernel */
+			__u8 pad[7];
+#define KVM_MSR_EXIT_REASON_INVAL	(1 << 0)
+#define KVM_MSR_EXIT_REASON_UNKNOWN	(1 << 1)
+#define KVM_MSR_EXIT_REASON_FILTER	(1 << 2)
+			__u32 reason; /* kernel -> user */
+			__u32 index; /* kernel -> user */
+			__u64 data; /* kernel <-> user */
+		} msr;
 		/* Fix the size of the union. */
 		char padding[256];
 	};
@@ -1037,6 +1050,9 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_SMALLER_MAXPHYADDR 185
 #define KVM_CAP_S390_DIAG318 186
 #define KVM_CAP_STEAL_TIME 187
+#define KVM_CAP_X86_USER_SPACE_MSR 188
+#define KVM_CAP_X86_MSR_FILTER 189
+#define KVM_CAP_ENFORCE_PV_FEATURE_CPUID 190
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
@@ -1538,6 +1554,9 @@ struct kvm_pv_cmd {
 /* Available with KVM_CAP_S390_PROTECTED */
 #define KVM_S390_PV_COMMAND		_IOWR(KVMIO, 0xc5, struct kvm_pv_cmd)
 
+/* Available with KVM_CAP_X86_MSR_FILTER */
+#define KVM_X86_SET_MSR_FILTER	_IOW(KVMIO,  0xc6, struct kvm_msr_filter)
+
 /* Secure Encrypted Virtualization command */
 enum sev_cmd_id {
 	/* Guest initialization commands */

tools/include/uapi/linux/mman.h

@@ -27,6 +27,7 @@
 #define MAP_HUGE_SHIFT	HUGETLB_FLAG_ENCODE_SHIFT
 #define MAP_HUGE_MASK	HUGETLB_FLAG_ENCODE_MASK
 
+#define MAP_HUGE_16KB	HUGETLB_FLAG_ENCODE_16KB
 #define MAP_HUGE_64KB	HUGETLB_FLAG_ENCODE_64KB
 #define MAP_HUGE_512KB	HUGETLB_FLAG_ENCODE_512KB
 #define MAP_HUGE_1MB	HUGETLB_FLAG_ENCODE_1MB

tools/include/uapi/linux/mount.h

@@ -16,6 +16,7 @@
 #define MS_REMOUNT	32	/* Alter flags of a mounted FS */
 #define MS_MANDLOCK	64	/* Allow mandatory locks on an FS */
 #define MS_DIRSYNC	128	/* Directory modifications are synchronous */
+#define MS_NOSYMFOLLOW	256	/* Do not follow symlinks */
 #define MS_NOATIME	1024	/* Do not update access times. */
 #define MS_NODIRATIME	2048	/* Do not update directory access times */
 #define MS_BIND		4096

tools/include/uapi/linux/prctl.h

@@ -233,6 +233,15 @@ struct prctl_mm_map {
 #define PR_SET_TAGGED_ADDR_CTRL		55
 #define PR_GET_TAGGED_ADDR_CTRL		56
 # define PR_TAGGED_ADDR_ENABLE		(1UL << 0)
+/* MTE tag check fault modes */
+# define PR_MTE_TCF_SHIFT		1
+# define PR_MTE_TCF_NONE		(0UL << PR_MTE_TCF_SHIFT)
+# define PR_MTE_TCF_SYNC		(1UL << PR_MTE_TCF_SHIFT)
+# define PR_MTE_TCF_ASYNC		(2UL << PR_MTE_TCF_SHIFT)
+# define PR_MTE_TCF_MASK		(3UL << PR_MTE_TCF_SHIFT)
+/* MTE tag inclusion mask */
+# define PR_MTE_TAG_SHIFT		3
+# define PR_MTE_TAG_MASK		(0xffffUL << PR_MTE_TAG_SHIFT)
 
 /* Control reclaim behavior when allocating memory */
 #define PR_SET_IO_FLUSHER		57

tools/include/uapi/linux/vhost.h

@@ -146,4 +146,8 @@
 
 /* Set event fd for config interrupt*/
 #define VHOST_VDPA_SET_CONFIG_CALL	_IOW(VHOST_VIRTIO, 0x77, int)
+
+/* Get the valid iova range */
+#define VHOST_VDPA_GET_IOVA_RANGE	_IOR(VHOST_VIRTIO, 0x78, \
+					     struct vhost_vdpa_iova_range)
 #endif

tools/perf/Makefile.config

@@ -749,6 +749,7 @@ else
   PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
   PERL_EMBED_CCOPTS = $(shell perl -MExtUtils::Embed -e ccopts 2>/dev/null)
   PERL_EMBED_CCOPTS := $(filter-out -specs=%,$(PERL_EMBED_CCOPTS))
+  PERL_EMBED_CCOPTS := $(filter-out -flto=auto -ffat-lto-objects, $(PERL_EMBED_CCOPTS))
   PERL_EMBED_LDOPTS := $(filter-out -specs=%,$(PERL_EMBED_LDOPTS))
   FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
 

tools/perf/arch/x86/entry/syscalls/syscall_64.tbl

@@ -361,12 +361,13 @@
 437	common	openat2			sys_openat2
 438	common	pidfd_getfd		sys_pidfd_getfd
 439	common	faccessat2		sys_faccessat2
+440	common	process_madvise		sys_process_madvise
 
 #
-# x32-specific system call numbers start at 512 to avoid cache impact
+# Due to a historical design error, certain syscalls are numbered differently
-# for native 64-bit operation. The __x32_compat_sys stubs are created
+# in x32 as compared to native x86_64.  These syscalls have numbers 512-547.
-# on-the-fly for compat_sys_*() compatibility system calls if X86_X32
+# Do not add new syscalls to this range.  Numbers 548 and above are available
-# is defined.
+# for non-x32 use.
 #
 512	x32	rt_sigaction		compat_sys_rt_sigaction
 513	x32	rt_sigreturn		compat_sys_x32_rt_sigreturn
@@ -404,3 +405,5 @@
 545	x32	execveat		compat_sys_execveat
 546	x32	preadv2			compat_sys_preadv64v2
 547	x32	pwritev2		compat_sys_pwritev64v2
+# This is the end of the legacy x32 range.  Numbers 548 and above are
+# not special and are not to be used for x32-specific syscalls.

tools/perf/builtin-trace.c

@@ -4639,9 +4639,9 @@ do_concat:
 	err = 0;
 
 	if (lists[0]) {
-		struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
+		struct option o = {
-					       "event selector. use 'perf list' to list available events",
+			.value = &trace->evlist,
-					       parse_events_option);
+		};
 		err = parse_events_option(&o, lists[0], 0);
 	}
 out:
@@ -4655,9 +4655,12 @@ static int trace__parse_cgroups(const struct option *opt, const char *str, int u
 {
 	struct trace *trace = opt->value;
 
-	if (!list_empty(&trace->evlist->core.entries))
+	if (!list_empty(&trace->evlist->core.entries)) {
-		return parse_cgroups(opt, str, unset);
+		struct option o = {
-
+			.value = &trace->evlist,
+		};
+		return parse_cgroups(&o, str, unset);
+	}
 	trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
 
 	return 0;

tools/perf/pmu-events/arch/x86/cascadelakex/clx-metrics.json

@@ -329,7 +329,7 @@
     },
     {
         "BriefDescription": "Average external Memory Bandwidth Use for reads and writes [GB / sec]",
-        "MetricExpr": "( 64 * ( uncore_imc@cas_count_read@ + uncore_imc@cas_count_write@ ) / 1000000000 ) / duration_time",
+        "MetricExpr": "( ( ( uncore_imc@cas_count_read@ + uncore_imc@cas_count_write@ ) * 1048576 ) / 1000000000 ) / duration_time",
         "MetricGroup": "Memory_BW;SoC",
         "MetricName": "DRAM_BW_Use"
     },

tools/perf/pmu-events/arch/x86/skylakex/skx-metrics.json

@@ -323,7 +323,7 @@
     },
     {
         "BriefDescription": "Average external Memory Bandwidth Use for reads and writes [GB / sec]",
-        "MetricExpr": "( 64 * ( uncore_imc@cas_count_read@ + uncore_imc@cas_count_write@ ) / 1000000000 ) / duration_time",
+        "MetricExpr": "( ( ( uncore_imc@cas_count_read@ + uncore_imc@cas_count_write@ ) * 1048576 ) / 1000000000 ) / duration_time",
         "MetricGroup": "Memory_BW;SoC",
         "MetricName": "DRAM_BW_Use"
     },

tools/perf/tests/dwarf-unwind.c

@@ -95,7 +95,7 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
 	return strcmp((const char *) symbol, funcs[idx]);
 }
 
-__no_tail_call noinline int test_dwarf_unwind__thread(struct thread *thread)
+noinline int test_dwarf_unwind__thread(struct thread *thread)
 {
 	struct perf_sample sample;
 	unsigned long cnt = 0;
@@ -126,7 +126,7 @@ __no_tail_call noinline int test_dwarf_unwind__thread(struct thread *thread)
 
 static int global_unwind_retval = -INT_MAX;
 
-__no_tail_call noinline int test_dwarf_unwind__compare(void *p1, void *p2)
+noinline int test_dwarf_unwind__compare(void *p1, void *p2)
 {
 	/* Any possible value should be 'thread' */
 	struct thread *thread = *(struct thread **)p1;
@@ -145,7 +145,7 @@ __no_tail_call noinline int test_dwarf_unwind__compare(void *p1, void *p2)
 	return p1 - p2;
 }
 
-__no_tail_call noinline int test_dwarf_unwind__krava_3(struct thread *thread)
+noinline int test_dwarf_unwind__krava_3(struct thread *thread)
 {
 	struct thread *array[2] = {thread, thread};
 	void *fp = &bsearch;
@@ -164,12 +164,12 @@ __no_tail_call noinline int test_dwarf_unwind__krava_3(struct thread *thread)
 	return global_unwind_retval;
 }
 
-__no_tail_call noinline int test_dwarf_unwind__krava_2(struct thread *thread)
+noinline int test_dwarf_unwind__krava_2(struct thread *thread)
 {
 	return test_dwarf_unwind__krava_3(thread);
 }
 
-__no_tail_call noinline int test_dwarf_unwind__krava_1(struct thread *thread)
+noinline int test_dwarf_unwind__krava_1(struct thread *thread)
 {
 	return test_dwarf_unwind__krava_2(thread);
 }

tools/perf/ui/browsers/hists.c

@@ -2963,7 +2963,7 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events,
 	struct popup_action actions[MAX_OPTIONS];
 	int nr_options = 0;
 	int key = -1;
-	char buf[64];
+	char buf[128];
 	int delay_secs = hbt ? hbt->refresh : 0;
 
 #define HIST_BROWSER_HELP_COMMON					\

tools/perf/util/build-id.c

@@ -102,6 +102,8 @@ int build_id__sprintf(const struct build_id *build_id, char *bf)
 	const u8 *raw = build_id->data;
 	size_t i;
 
+	bf[0] = 0x0;
+
 	for (i = 0; i < build_id->size; ++i) {
 		sprintf(bid, "%02x", *raw);
 		++raw;

tools/perf/util/hashmap.c

@@ -15,6 +15,9 @@
 /* make sure libbpf doesn't use kernel-only integer typedefs */
 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
 
+/* prevent accidental re-addition of reallocarray() */
+#pragma GCC poison reallocarray
+
 /* start with 4 buckets */
 #define HASHMAP_MIN_CAP_BITS 2
 

tools/perf/util/hashmap.h

@@ -25,6 +25,18 @@ static inline size_t hash_bits(size_t h, int bits)
 #endif
 }
 
+/* generic C-string hashing function */
+static inline size_t str_hash(const char *s)
+{
+	size_t h = 0;
+
+	while (*s) {
+		h = h * 31 + *s;
+		s++;
+	}
+	return h;
+}
+
 typedef size_t (*hashmap_hash_fn)(const void *key, void *ctx);
 typedef bool (*hashmap_equal_fn)(const void *key1, const void *key2, void *ctx);
 

tools/perf/util/machine.c

@@ -786,11 +786,20 @@ static int machine__process_ksymbol_unregister(struct machine *machine,
 					       union perf_event *event,
 					       struct perf_sample *sample __maybe_unused)
 {
+	struct symbol *sym;
 	struct map *map;
 
 	map = maps__find(&machine->kmaps, event->ksymbol.addr);
-	if (map)
+	if (!map)
+		return 0;
+
+	if (map != machine->vmlinux_map)
 		maps__remove(&machine->kmaps, map);
+	else {
+		sym = dso__find_symbol(map->dso, map->map_ip(map, map->start));
+		if (sym)
+			dso__delete_symbol(map->dso, sym);
+	}
 
 	return 0;
 }

tools/perf/util/scripting-engines/trace-event-python.c

@@ -1592,7 +1592,6 @@ static void _free_command_line(wchar_t **command_line, int num)
 static int python_start_script(const char *script, int argc, const char **argv)
 {
 	struct tables *tables = &tables_global;
-	PyMODINIT_FUNC (*initfunc)(void);
 #if PY_MAJOR_VERSION < 3
 	const char **command_line;
 #else
@@ -1607,20 +1606,18 @@ static int python_start_script(const char *script, int argc, const char **argv)
 	FILE *fp;
 
 #if PY_MAJOR_VERSION < 3
-	initfunc = initperf_trace_context;
 	command_line = malloc((argc + 1) * sizeof(const char *));
 	command_line[0] = script;
 	for (i = 1; i < argc + 1; i++)
 		command_line[i] = argv[i - 1];
+	PyImport_AppendInittab(name, initperf_trace_context);
 #else
-	initfunc = PyInit_perf_trace_context;
 	command_line = malloc((argc + 1) * sizeof(wchar_t *));
 	command_line[0] = Py_DecodeLocale(script, NULL);
 	for (i = 1; i < argc + 1; i++)
 		command_line[i] = Py_DecodeLocale(argv[i - 1], NULL);
+	PyImport_AppendInittab(name, PyInit_perf_trace_context);
 #endif
-
-	PyImport_AppendInittab(name, initfunc);
 	Py_Initialize();
 
 #if PY_MAJOR_VERSION < 3

tools/perf/util/session.c

@@ -595,6 +595,7 @@ static void perf_event__mmap2_swap(union perf_event *event,
 	event->mmap2.maj   = bswap_32(event->mmap2.maj);
 	event->mmap2.min   = bswap_32(event->mmap2.min);
 	event->mmap2.ino   = bswap_64(event->mmap2.ino);
+	event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
 
 	if (sample_id_all) {
 		void *data = &event->mmap2.filename;
@@ -710,6 +711,18 @@ static void perf_event__namespaces_swap(union perf_event *event,
 		swap_sample_id_all(event, &event->namespaces.link_info[i]);
 }
 
+static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all)
+{
+	event->cgroup.id = bswap_64(event->cgroup.id);
+
+	if (sample_id_all) {
+		void *data = &event->cgroup.path;
+
+		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
+		swap_sample_id_all(event, data);
+	}
+}
+
 static u8 revbyte(u8 b)
 {
 	int rev = (b >> 4) | ((b & 0xf) << 4);
@@ -952,6 +965,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
 	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
 	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
 	[PERF_RECORD_NAMESPACES]	  = perf_event__namespaces_swap,
+	[PERF_RECORD_CGROUP]		  = perf_event__cgroup_swap,
 	[PERF_RECORD_TEXT_POKE]		  = perf_event__text_poke_swap,
 	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
 	[PERF_RECORD_HEADER_EVENT_TYPE]	  = perf_event__event_type_swap,

tools/perf/util/symbol.c

@@ -515,6 +515,13 @@ void dso__insert_symbol(struct dso *dso, struct symbol *sym)
 	}
 }
 
+void dso__delete_symbol(struct dso *dso, struct symbol *sym)
+{
+	rb_erase_cached(&sym->rb_node, &dso->symbols);
+	symbol__delete(sym);
+	dso__reset_find_symbol_cache(dso);
+}
+
 struct symbol *dso__find_symbol(struct dso *dso, u64 addr)
 {
 	if (dso->last_find_result.addr != addr || dso->last_find_result.symbol == NULL) {

tools/perf/util/symbol.h

@@ -131,6 +131,8 @@ int dso__load_kallsyms(struct dso *dso, const char *filename, struct map *map);
 
 void dso__insert_symbol(struct dso *dso,
 			struct symbol *sym);
+void dso__delete_symbol(struct dso *dso,
+			struct symbol *sym);
 
 struct symbol *dso__find_symbol(struct dso *dso, u64 addr);
 struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name);

tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c

@@ -3282,4 +3282,99 @@ TEST(epoll60)
 	close(ctx.epfd);
 }
 
+struct epoll61_ctx {
+	int epfd;
+	int evfd;
+};
+
+static void *epoll61_write_eventfd(void *ctx_)
+{
+	struct epoll61_ctx *ctx = ctx_;
+	int64_t l = 1;
+
+	usleep(10950);
+	write(ctx->evfd, &l, sizeof(l));
+	return NULL;
+}
+
+static void *epoll61_epoll_with_timeout(void *ctx_)
+{
+	struct epoll61_ctx *ctx = ctx_;
+	struct epoll_event events[1];
+	int n;
+
+	n = epoll_wait(ctx->epfd, events, 1, 11);
+	/*
+	 * If epoll returned the eventfd, write on the eventfd to wake up the
+	 * blocking poller.
+	 */
+	if (n == 1) {
+		int64_t l = 1;
+
+		write(ctx->evfd, &l, sizeof(l));
+	}
+	return NULL;
+}
+
+static void *epoll61_blocking_epoll(void *ctx_)
+{
+	struct epoll61_ctx *ctx = ctx_;
+	struct epoll_event events[1];
+
+	epoll_wait(ctx->epfd, events, 1, -1);
+	return NULL;
+}
+
+TEST(epoll61)
+{
+	struct epoll61_ctx ctx;
+	struct epoll_event ev;
+	int i, r;
+
+	ctx.epfd = epoll_create1(0);
+	ASSERT_GE(ctx.epfd, 0);
+	ctx.evfd = eventfd(0, EFD_NONBLOCK);
+	ASSERT_GE(ctx.evfd, 0);
+
+	ev.events = EPOLLIN | EPOLLET | EPOLLERR | EPOLLHUP;
+	ev.data.ptr = NULL;
+	r = epoll_ctl(ctx.epfd, EPOLL_CTL_ADD, ctx.evfd, &ev);
+	ASSERT_EQ(r, 0);
+
+	/*
+	 * We are testing a race.  Repeat the test case 1000 times to make it
+	 * more likely to fail in case of a bug.
+	 */
+	for (i = 0; i < 1000; i++) {
+		pthread_t threads[3];
+		int n;
+
+		/*
+		 * Start 3 threads:
+		 * Thread 1 sleeps for 10.9ms and writes to the evenfd.
+		 * Thread 2 calls epoll with a timeout of 11ms.
+		 * Thread 3 calls epoll with a timeout of -1.
+		 *
+		 * The eventfd write by Thread 1 should either wakeup Thread 2
+		 * or Thread 3.  If it wakes up Thread 2, Thread 2 writes on the
+		 * eventfd to wake up Thread 3.
+		 *
+		 * If no events are missed, all three threads should eventually
+		 * be joinable.
+		 */
+		ASSERT_EQ(pthread_create(&threads[0], NULL,
+					 epoll61_write_eventfd, &ctx), 0);
+		ASSERT_EQ(pthread_create(&threads[1], NULL,
+					 epoll61_epoll_with_timeout, &ctx), 0);
+		ASSERT_EQ(pthread_create(&threads[2], NULL,
+					 epoll61_blocking_epoll, &ctx), 0);
+
+		for (n = 0; n < ARRAY_SIZE(threads); ++n)
+			ASSERT_EQ(pthread_join(threads[n], NULL), 0);
+	}
+
+	close(ctx.epfd);
+	close(ctx.evfd);
+}
+
 TEST_HARNESS_MAIN

tools/testing/selftests/kselftest_harness.h

@@ -432,7 +432,7 @@
  */
 
 /**
- * ASSERT_EQ(expected, seen)
+ * ASSERT_EQ()
  *
  * @expected: expected value
  * @seen: measured value
@@ -443,7 +443,7 @@
 	__EXPECT(expected, #expected, seen, #seen, ==, 1)
 
 /**
- * ASSERT_NE(expected, seen)
+ * ASSERT_NE()
  *
  * @expected: expected value
  * @seen: measured value
@@ -454,7 +454,7 @@
 	__EXPECT(expected, #expected, seen, #seen, !=, 1)
 
 /**
- * ASSERT_LT(expected, seen)
+ * ASSERT_LT()
  *
  * @expected: expected value
  * @seen: measured value
@@ -465,7 +465,7 @@
 	__EXPECT(expected, #expected, seen, #seen, <, 1)
 
 /**
- * ASSERT_LE(expected, seen)
+ * ASSERT_LE()
  *
  * @expected: expected value
  * @seen: measured value
@@ -476,7 +476,7 @@
 	__EXPECT(expected, #expected, seen, #seen, <=, 1)
 
 /**
- * ASSERT_GT(expected, seen)
+ * ASSERT_GT()
  *
  * @expected: expected value
  * @seen: measured value
@@ -487,7 +487,7 @@
 	__EXPECT(expected, #expected, seen, #seen, >, 1)
 
 /**
- * ASSERT_GE(expected, seen)
+ * ASSERT_GE()
  *
  * @expected: expected value
  * @seen: measured value
@@ -498,7 +498,7 @@
 	__EXPECT(expected, #expected, seen, #seen, >=, 1)
 
 /**
- * ASSERT_NULL(seen)
+ * ASSERT_NULL()
  *
  * @seen: measured value
  *
@@ -508,7 +508,7 @@
 	__EXPECT(NULL, "NULL", seen, #seen, ==, 1)
 
 /**
- * ASSERT_TRUE(seen)
+ * ASSERT_TRUE()
  *
  * @seen: measured value
  *
@@ -518,7 +518,7 @@
 	__EXPECT(0, "0", seen, #seen, !=, 1)
 
 /**
- * ASSERT_FALSE(seen)
+ * ASSERT_FALSE()
  *
  * @seen: measured value
  *
@@ -528,7 +528,7 @@
 	__EXPECT(0, "0", seen, #seen, ==, 1)
 
 /**
- * ASSERT_STREQ(expected, seen)
+ * ASSERT_STREQ()
  *
  * @expected: expected value
  * @seen: measured value
@@ -539,7 +539,7 @@
 	__EXPECT_STR(expected, seen, ==, 1)
 
 /**
- * ASSERT_STRNE(expected, seen)
+ * ASSERT_STRNE()
  *
  * @expected: expected value
  * @seen: measured value
@@ -550,7 +550,7 @@
 	__EXPECT_STR(expected, seen, !=, 1)
 
 /**
- * EXPECT_EQ(expected, seen)
+ * EXPECT_EQ()
  *
  * @expected: expected value
  * @seen: measured value
@@ -561,7 +561,7 @@
 	__EXPECT(expected, #expected, seen, #seen, ==, 0)
 
 /**
- * EXPECT_NE(expected, seen)
+ * EXPECT_NE()
  *
  * @expected: expected value
  * @seen: measured value
@@ -572,7 +572,7 @@
 	__EXPECT(expected, #expected, seen, #seen, !=, 0)
 
 /**
- * EXPECT_LT(expected, seen)
+ * EXPECT_LT()
  *
  * @expected: expected value
  * @seen: measured value
@@ -583,7 +583,7 @@
 	__EXPECT(expected, #expected, seen, #seen, <, 0)
 
 /**
- * EXPECT_LE(expected, seen)
+ * EXPECT_LE()
  *
  * @expected: expected value
  * @seen: measured value
@@ -594,7 +594,7 @@
 	__EXPECT(expected, #expected, seen, #seen, <=, 0)
 
 /**
- * EXPECT_GT(expected, seen)
+ * EXPECT_GT()
  *
  * @expected: expected value
  * @seen: measured value
@@ -605,7 +605,7 @@
 	__EXPECT(expected, #expected, seen, #seen, >, 0)
 
 /**
- * EXPECT_GE(expected, seen)
+ * EXPECT_GE()
  *
  * @expected: expected value
  * @seen: measured value
@@ -616,7 +616,7 @@
 	__EXPECT(expected, #expected, seen, #seen, >=, 0)
 
 /**
- * EXPECT_NULL(seen)
+ * EXPECT_NULL()
  *
  * @seen: measured value
  *
@@ -626,7 +626,7 @@
 	__EXPECT(NULL, "NULL", seen, #seen, ==, 0)
 
 /**
- * EXPECT_TRUE(seen)
+ * EXPECT_TRUE()
  *
  * @seen: measured value
  *
@@ -636,7 +636,7 @@
 	__EXPECT(0, "0", seen, #seen, !=, 0)
 
 /**
- * EXPECT_FALSE(seen)
+ * EXPECT_FALSE()
  *
  * @seen: measured value
  *
@@ -646,7 +646,7 @@
 	__EXPECT(0, "0", seen, #seen, ==, 0)
 
 /**
- * EXPECT_STREQ(expected, seen)
+ * EXPECT_STREQ()
  *
  * @expected: expected value
  * @seen: measured value
@@ -657,7 +657,7 @@
 	__EXPECT_STR(expected, seen, ==, 0)
 
 /**
- * EXPECT_STRNE(expected, seen)
+ * EXPECT_STRNE()
  *
  * @expected: expected value
  * @seen: measured value