Commit Graph

157295 Commits

Author SHA1 Message Date
David S. Miller
18a4d8bf25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-03-04 13:26:15 -08:00
Palmer Dabbelt
13fd5de065 RISC-V: Fixmap support and MM cleanups
This patchset does:
1. Moves MM related code from kernel/setup.c to mm/init.c
2. Implements compile-time fixed mappings

Using fixed mappings, we get earlyprints even without SBI calls.

For example, we can now use kernel parameter
"earlycon=uart8250,mmio,0x10000000"
to get early prints on QEMU virt machine without using SBI calls.

The patchset is tested on QEMU virt machine.

Palmer: It looks like some of the code movement here conflicted with the
patches to move hartid handling around.  As far as I can tell the only
changed code was in smp_setup_processor_id(), and I've kept the one in
smp.c.
2019-03-04 11:47:04 -08:00
Andreas Schwab
f7ccc35aa3 arch: riscv: fix logic error in parse_dtb
The function early_init_dt_scan returns true if a DTB was detected.

Fixes: 8fd6e05c74 ("arch: riscv: support kernel command line forcing when no DTB passed")
Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Paul Walmsley <paul.walmsley@sifive.com>
Tested-by: Paul Walmsley <paul.walmsley@sifive.com> # FU540 HiFive-U BBL
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2019-03-04 11:32:14 -08:00
Linus Torvalds
736706bee3 get rid of legacy 'get_ds()' function
Every in-kernel use of this function defined it to KERNEL_DS (either as
an actual define, or as an inline function).  It's an entirely
historical artifact, and long long long ago used to actually read the
segment selector valueof '%ds' on x86.

Which in the kernel is always KERNEL_DS.

Inspired by a patch from Jann Horn that just did this for a very small
subset of users (the ones in fs/), along with Al who suggested a script.
I then just took it to the logical extreme and removed all the remaining
gunk.

Roughly scripted with

   git grep -l '(get_ds())' -- :^tools/ | xargs sed -i 's/(get_ds())/(KERNEL_DS)/'
   git grep -lw 'get_ds' -- :^tools/ | xargs sed -i '/^#define get_ds()/d'

plus manual fixups to remove a few unusual usage patterns, the couple of
inline function cases and to fix up a comment that had become stale.

The 'get_ds()' function remains in an x86 kvm selftest, since in user
space it actually does something relevant.

Inspired-by: Jann Horn <jannh@google.com>
Inspired-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-04 10:50:14 -08:00
Atish Patra
fbdc6193dc RISC-V: Assign hwcap as per comman capabilities.
Currently, we set hwcap based on first valid hart from DT. This may not
be correct always as that hart might not be current booting cpu or may
have a different capability.

Set hwcap as the capabilities supported by all possible harts with "okay"
status.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2019-03-04 10:40:39 -08:00
Atish Patra
291debb38d RISC-V: Compare cpuid with NR_CPUS before mapping.
We should never have a cpuid greater that NR_CPUS. Compare with NR_CPUS
before creating the mapping between logical and physical CPU ids. This
is also mandatory as NR_CPUS check is removed from
riscv_of_processor_hartid.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2019-03-04 10:40:39 -08:00
Atish Patra
dd641e2686 RISC-V: Allow hartid-to-cpuid function to fail.
It is perfectly okay to call riscv_hartid_to_cpuid for a hartid that is
not mapped with an CPU id. It can happen if the calling functions
retrieves the hartid from DT.  However, that hartid was never brought
online by the firmware or kernel for any reasons.

No need to BUG() in the above case. A negative error return is
sufficient and the calling function should check for the return value
always.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2019-03-04 10:40:39 -08:00
Atish Patra
ba15c86185 RISC-V: Remove NR_CPUs check during hartid search from DT
In non-smp configuration, hartid can be higher that NR_CPUS.
riscv_of_processor_hartid should not be compared to hartid to NR_CPUS in
that case. Moreover, this function checks all the DT properties of a
hart node. NR_CPUS comparison seems out of place.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2019-03-04 10:40:38 -08:00
Atish Patra
78d1daa364 RISC-V: Move cpuid to hartid mapping to SMP.
Currently, logical CPU id to physical hartid mapping is defined for both
smp and non-smp configurations. This is not required as we need this
only for smp configuration.  The mapping function can define directly
boot_cpu_hartid for non-smp use case.

The reverse mapping function i.e. hartid to cpuid can be called for any
valid but not booted harts. So it should return default cpu 0 only if it
is a boot hartid.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2019-03-04 10:40:38 -08:00
Atish Patra
e15c6e3706 RISC-V: Do not wait indefinitely in __cpu_up
In SMP path, __cpu_up waits for other CPU to come online indefinitely.
This is wrong as other CPU might be disabled in machine mode and
possible CPU is set to the cpus present in DT.

Introduce a completion variable and waits only for a second.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2019-03-04 10:40:36 -08:00
Linus Torvalds
00c42373d3 x86-64: add warning for non-canonical user access address dereferences
This adds a warning (once) for any kernel dereference that has a user
exception handler, but accesses a non-canonical address.  It basically
is a simpler - and more limited - version of commit 9da3f2b740
("x86/fault: BUG() when uaccess helpers fault on kernel addresses") that
got reverted.

Note that unlike that original commit, this only causes a warning,
because there are real situations where we currently can do this
(notably speculative argument fetching for uprobes etc).  Also, unlike
that original commit, this _only_ triggers for #GP accesses, so the
cases of valid kernel pointers that cross into a non-mapped page aren't
affected.

The intent of this is two-fold:

 - the uprobe/tracing accesses really do need to be more careful. In
   particular, from a portability standpoint it's just wrong to think
   that "a pointer is a pointer", and use the same logic for any random
   pointer value you find on the stack. It may _work_ on x86-64, but it
   doesn't necessarily work on other architectures (where the same
   pointer value can be either a kernel pointer _or_ a user pointer, and
   you really need to be much more careful in how you try to access it)

   The warning can hopefully end up being a reminder that just any
   random pointer access won't do.

 - Kees in particular wanted a way to actually report invalid uses of
   wild pointers to user space accessors, instead of just silently
   failing them. Automated fuzzers want a way to get reports if the
   kernel ever uses invalid values that the fuzzer fed it.

   The non-canonical address range is a fair chunk of the address space,
   and with this you can teach syzkaller to feed in invalid pointer
   values and find cases where we do not properly validate user
   addresses (possibly due to bad uses of "set_fs()").

Acked-by: Kees Cook <keescook@chromium.org>
Cc: Jann Horn <jannh@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-04 10:08:28 -08:00
Mark Brown
14dbfb417b Merge branch 'spi-5.1' into spi-next 2019-03-04 15:32:51 +00:00
Mark Brown
88f268a5bc Merge branch 'regulator-5.1' into regulator-next 2019-03-04 15:32:43 +00:00
Rafael J. Wysocki
dcaed592b2 Merge branch 'acpi-apei'
* acpi-apei: (29 commits)
  efi: cper: Fix possible out-of-bounds access
  ACPI: APEI: Fix possible out-of-bounds access to BERT region
  MAINTAINERS: Add James Morse to the list of APEI reviewers
  ACPI / APEI: Add support for the SDEI GHES Notification type
  firmware: arm_sdei: Add ACPI GHES registration helper
  ACPI / APEI: Use separate fixmap pages for arm64 NMI-like notifications
  ACPI / APEI: Only use queued estatus entry during in_nmi_queue_one_entry()
  ACPI / APEI: Split ghes_read_estatus() to allow a peek at the CPER length
  ACPI / APEI: Make GHES estatus header validation more user friendly
  ACPI / APEI: Pass ghes and estatus separately to avoid a later copy
  ACPI / APEI: Let the notification helper specify the fixmap slot
  ACPI / APEI: Move locking to the notification helper
  arm64: KVM/mm: Move SEA handling behind a single 'claim' interface
  KVM: arm/arm64: Add kvm_ras.h to collect kvm specific RAS plumbing
  ACPI / APEI: Switch NOTIFY_SEA to use the estatus queue
  ACPI / APEI: Move NOTIFY_SEA between the estatus-queue and NOTIFY_NMI
  ACPI / APEI: Don't allow ghes_ack_error() to mask earlier errors
  ACPI / APEI: Generalise the estatus queue's notify code
  ACPI / APEI: Don't update struct ghes' flags in read/clear estatus
  ACPI / APEI: Remove spurious GHES_TO_CLEAR check
  ...
2019-03-04 11:16:35 +01:00
Christophe Leroy
9580b71b5a powerpc/32: Clear on-stack exception marker upon exception return
Clear the on-stack STACK_FRAME_REGS_MARKER on exception exit in order
to avoid confusing stacktrace like the one below.

  Call Trace:
  [c0e9dca0] [c01c42a0] print_address_description+0x64/0x2bc (unreliable)
  [c0e9dcd0] [c01c4684] kasan_report+0xfc/0x180
  [c0e9dd10] [c0895130] memchr+0x24/0x74
  [c0e9dd30] [c00a9e38] msg_print_text+0x124/0x574
  [c0e9dde0] [c00ab710] console_unlock+0x114/0x4f8
  [c0e9de40] [c00adc60] vprintk_emit+0x188/0x1c4
  --- interrupt: c0e9df00 at 0x400f330
      LR = init_stack+0x1f00/0x2000
  [c0e9de80] [c00ae3c4] printk+0xa8/0xcc (unreliable)
  [c0e9df20] [c0c27e44] early_irq_init+0x38/0x108
  [c0e9df50] [c0c15434] start_kernel+0x310/0x488
  [c0e9dff0] [00003484] 0x3484

With this patch the trace becomes:

  Call Trace:
  [c0e9dca0] [c01c42c0] print_address_description+0x64/0x2bc (unreliable)
  [c0e9dcd0] [c01c46a4] kasan_report+0xfc/0x180
  [c0e9dd10] [c0895150] memchr+0x24/0x74
  [c0e9dd30] [c00a9e58] msg_print_text+0x124/0x574
  [c0e9dde0] [c00ab730] console_unlock+0x114/0x4f8
  [c0e9de40] [c00adc80] vprintk_emit+0x188/0x1c4
  [c0e9de80] [c00ae3e4] printk+0xa8/0xcc
  [c0e9df20] [c0c27e44] early_irq_init+0x38/0x108
  [c0e9df50] [c0c15434] start_kernel+0x310/0x488
  [c0e9dff0] [00003484] 0x3484

Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-03-04 00:37:23 +11:00
Linus Torvalds
c027c7cf15 Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC fixes from Arnd Bergmann:
 "One more set of simple ARM platform fixes:

   - A boot regression on qualcomm msm8998

   - Gemini display controllers got turned off by accident

   - incorrect reference counting in optee"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  tee: optee: add missing of_node_put after of_device_is_available
  arm64: dts: qcom: msm8998: Extend TZ reserved memory area
  ARM: dts: gemini: Re-enable display controller
2019-03-02 16:43:15 -08:00
David S. Miller
2369afb669 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Johan Hedberg says:

====================
pull request: bluetooth-next 2019-03-02

Here's one more bluetooth-next pull request for the 5.1 kernel:

 - Added support for MediaTek MT7663U and MT7668U UART devices
 - Cleanups & fixes to the hci_qca driver
 - Fixed wakeup pin behavior for QCA6174A controller

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-03-02 13:55:36 -08:00
David S. Miller
9eb359140c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-03-02 12:54:35 -08:00
Linus Torvalds
e7c42a89e9 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
 "Two last minute fixes:

   - Prevent value evaluation via functions happening in the user access
     enabled region of __put_user() (put another way: make sure to
     evaluate the value to be stored in user space _before_ enabling
     user space accesses)

   - Correct the definition of a Hyper-V hypercall constant"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyper-v: Fix definition of HV_MAX_FLUSH_REP_COUNT
  x86/uaccess: Don't leak the AC flag into __put_user() value evaluation
2019-03-02 11:47:29 -08:00
Linus Torvalds
c93d9218ea Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix refcount leak in act_ipt during replace, from Davide Caratti.

 2) Set task state properly in tun during blocking reads, from Timur
    Celik.

 3) Leaked reference in DSA, from Wen Yang.

 4) NULL deref in act_tunnel_key, from Vlad Buslov.

 5) cipso_v4_erro can reference the skb IPCB in inappropriate contexts
    thus referencing garbage, from Nazarov Sergey.

 6) Don't accept RTA_VIA and RTA_GATEWAY in contexts where those
    attributes make no sense.

 7) Fix hung sendto in tipc, from Tung Nguyen.

 8) Out-of-bounds access in netlabel, from Paul Moore.

 9) Grant reference leak in xen-netback, from Igor Druzhinin.

10) Fix tx stalls with lan743x, from Bryan Whitehead.

11) Fix interrupt storm with mv88e6xxx, from Hein Kallweit.

12) Memory leak in sit on device registry failure, from Mao Wenan.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (44 commits)
  net: sit: fix memory leak in sit_init_net()
  net: dsa: mv88e6xxx: Fix statistics on mv88e6161
  geneve: correctly handle ipv6.disable module parameter
  net: dsa: mv88e6xxx: prevent interrupt storm caused by mv88e6390x_port_set_cmode
  bpf: fix sanitation rewrite in case of non-pointers
  ipv4: Add ICMPv6 support when parse route ipproto
  MIPS: eBPF: Fix icache flush end address
  lan743x: Fix TX Stall Issue
  net: phy: phylink: fix uninitialized variable in phylink_get_mac_state
  net: aquantia: regression on cpus with high cores: set mode with 8 queues
  selftests: fixes for UDP GRO
  bpf: drop refcount if bpf_map_new_fd() fails in map_create()
  net: dsa: mv88e6xxx: power serdes on/off for 10G interfaces on 6390X
  net: dsa: mv88e6xxx: Fix u64 statistics
  xen-netback: don't populate the hash cache on XenBus disconnect
  xen-netback: fix occasional leak of grant ref mappings under memory pressure
  sctp: chunk.c: correct format string for size_t in printk
  net: netem: fix skb length BUG_ON in __skb_to_sgvec
  netlabel: fix out-of-bounds memory accesses
  ipv4: Pass original device to ip_rcv_finish_core
  ...
2019-03-02 08:46:34 -08:00
Linus Torvalds
fa3294c58c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull more crypto fixes from Herbert Xu:
 "This fixes a couple of issues in arm64/chacha that was introduced in
  5.0"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: arm64/chacha - fix hchacha_block_neon() for big endian
  crypto: arm64/chacha - fix chacha_4block_xor_neon() for big endian
2019-03-02 08:32:02 -08:00
Joe Lawrence
39070a96a1 powerpc: Remove export of save_stack_trace_tsk_reliable()
As tglx points out, there are no in-tree module users of
save_stack_trace_tsk_reliable() and its x86 counterpart is not
exported, so remove the powerpc symbol export.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-03-02 14:43:05 +11:00
Qian Cai
c38ca26552 powerpc/mm: fix "section_base" set but not used
The commit 24b6d41643 ("mm: pass the vmem_altmap to vmemmap_free")
removed a line in vmemmap_free(),

altmap = to_vmem_altmap((unsigned long) section_base);

but left a variable no longer used.

arch/powerpc/mm/init_64.c: In function 'vmemmap_free':
arch/powerpc/mm/init_64.c:277:16: error: variable 'section_base' set but
not used [-Werror=unused-but-set-variable]

Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-03-02 14:43:05 +11:00
Qian Cai
8132cf115e powerpc/mm: Fix "sz" set but not used warning
Fix compiler warning:
  arch/powerpc/mm/hugetlbpage-hash64.c: In function '__hash_page_huge':
  arch/powerpc/mm/hugetlbpage-hash64.c:29:28: warning: variable 'sz' set
  but not used [-Wunused-but-set-variable]

mpe: The last usage of sz was removed in 0895ecda79 ("powerpc/mm:
Bring hugepage PTE accessor functions back into sync with normal
accessors").

Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-03-02 14:43:05 +11:00
Rashmica Gupta
790845e2f1 powerpc/mm: Check secondary hash page table
We were always calling base_hpte_find() with primary = true,
even when we wanted to check the secondary table.

mpe: I broke this when refactoring Rashmica's original patch.

Fixes: 1515ab9321 ("powerpc/mm: Dump hash table")
Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-03-02 14:43:05 +11:00
Firoz Khan
6b1200facc powerpc: remove nargs from __SYSCALL
The __SYSCALL macro's arguments are system call number,
system call entry name and number of arguments for the
system call.

Argument- nargs in __SYSCALL(nr, entry, nargs) is neither
calculated nor used anywhere. So it would be better to
keep the implementaion as  __SYSCALL(nr, entry). This will
unifies the implementation with some other architetures
too.

Signed-off-by: Firoz Khan <firoz.khan@linaro.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-03-02 14:43:05 +11:00
Michael Ellerman
2de04718ec Merge branch 'topic/ppc-kvm' into next
Merge another commit in the topic/ppc-kvm branch we're sharing with
kvm-ppc.
2019-03-02 14:42:28 +11:00
Paul Burton
d1a2930d8a MIPS: eBPF: Fix icache flush end address
The MIPS eBPF JIT calls flush_icache_range() in order to ensure the
icache observes the code that we just wrote. Unfortunately it gets the
end address calculation wrong due to some bad pointer arithmetic.

The struct jit_ctx target field is of type pointer to u32, and as such
adding one to it will increment the address being pointed to by 4 bytes.
Therefore in order to find the address of the end of the code we simply
need to add the number of 4 byte instructions emitted, but we mistakenly
add the number of instructions multiplied by 4. This results in the call
to flush_icache_range() operating on a memory region 4x larger than
intended, which is always wasteful and can cause crashes if we overrun
into an unmapped page.

Fix this by correcting the pointer arithmetic to remove the bogus
multiplication, and use braces to remove the need for a set of brackets
whilst also making it obvious that the target field is a pointer.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: b6bd53f9c4 ("MIPS: Add missing file for eBPF JIT.")
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: netdev@vger.kernel.org
Cc: bpf@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: stable@vger.kernel.org # v4.13+
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-03-02 00:04:15 +01:00
Claudiu Manoil
0c805404f0 arm64: dts: fsl: ls1028a-rdb: Add ENETC external eth ports for the LS1028A RDB board
The LS1028A RDB board features an Atheros PHY connected over
SGMII to the ENETC PF0 (or Port0).  ENETC Port1 (PF1) has no
external connection on this board, so it can be disabled for now.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-03-01 11:21:32 -08:00
Claudiu Manoil
927d7f8575 arm64: dts: fsl: ls1028a: Add PCI IERC node and ENETC endpoints
The LS1028A SoC features a PCI Integrated Endpoint Root Complex
(IERC) defining several integrated PCI devices, including the ENETC
ethernet controller integrated endpoints (IEPs). The IERC implements
ECAM (Enhanced Configuration Access Mechanism) to provide access
to the PCIe config space of the IEPs. This means the the IEPs
(including ENETC) do not support the standard PCIe BARs, instead
the Enhanced Allocation (EA) capability structures in the ECAM space
are used to fix the base addresses in the system, and the PCI
subsystem uses these structures for device enumeration and discovery.
The "ranges" entries contain basic information from these EA capabily
structures required by the kernel for device enumeration.

The current patch also enables the first 2 ENETC PFs (Physiscal
Functions) and the associated VFs (Virtual Functions), 2 VFs for
each PF.  Each of these ENETC PFs has an external ethernet port
on the LS1028A SoC.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-03-01 11:21:32 -08:00
Peng Fan
b855b58ac1 arm64: mmu: drop paging_init comments
The comments could not reflect the code, and it is easy to get
what this function does from a straight-line reading of the code.
So let's drop the comments

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-03-01 16:40:07 +00:00
Will Deacon
6bd288569b arm64: debug: Ensure debug handlers check triggering exception level
Debug exception handlers may be called for exceptions generated both by
user and kernel code. In many cases, this is checked explicitly, but
in other cases things either happen to work by happy accident or they
go slightly wrong. For example, executing 'brk #4' from userspace will
enter the kprobes code and be ignored, but the instruction will be
retried forever in userspace instead of delivering a SIGTRAP.

Fix this issue in the most stable-friendly fashion by simply adding
explicit checks of the triggering exception level to all of our debug
exception handlers.

Cc: <stable@vger.kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-03-01 16:23:38 +00:00
Will Deacon
b9a4b9d084 arm64: debug: Don't propagate UNKNOWN FAR into si_code for debug signals
FAR_EL1 is UNKNOWN for all debug exceptions other than those caused by
taking a hardware watchpoint. Unfortunately, if a debug handler returns
a non-zero value, then we will propagate the UNKNOWN FAR value to
userspace via the si_addr field of the SIGTRAP siginfo_t.

Instead, let's set si_addr to take on the PC of the faulting instruction,
which we have available in the current pt_regs.

Cc: <stable@vger.kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-03-01 16:23:17 +00:00
Martin Schwidefsky
c8e8ed386a s390/suspend: fix prefix register reset in swsusp_arch_resume
The reset of the prefix to zero in swsusp_arch_resume uses a 4 byte stack
slot. With CONFIG_VMAP_STACK=y this is now in the vmalloc area, this works
only with DAT enabled. Move the DAT disable in swsusp_arch_resume after
the prefix reset.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2019-03-01 16:23:27 +01:00
Arnd Bergmann
c889e2a0b0 Merge branch 'milbeaut/newsoc' into arm/newsoc
Sugaya Taichi <sugaya.taichi@socionext.com> explains:

Here is the series of patches the initial support for SC2000(M10V) of
Milbeaut SoCs. "M10V" is the internal name of SC2000, so commonly used in
source code.

SC2000 is a SoC of the Milbeaut series. equipped with a DSP optimized for
computer vision. It also features advanced functionalities such as 360-degree,
real-time spherical stitching with multi cameras, image stabilization for
without mechanical gimbals, and rolling shutter correction. More detail is
below:
https://www.socionext.com/en/products/assp/milbeaut/SC2000.html

Specifications for developers are below:
 - Quad-core 32bit Cortex-A7 on ARMv7-A architecture
 - NEON support
 - DSP
 - GPU
 - MAX 3GB DDR3
 - Cortex-M0 for power control
 - NAND Flash Interface
 - SD UHS-I
 - SD UHS-II
 - SDIO
 - USB2.0 HOST / Device
 - USB3.0 HOST / Device
 - PCI express Gen2
 - Ethernet Engine
 - I2C
 - UART
 - SPI
 - PWM

Support is quite minimal for now, since it only includes timer, clock,
pictrl and serial controller drivers, so we can only boot to userspace
through initramfs. Support for the other peripherals  will come eventually.

* milbeaut/newsoc:
  ARM: multi_v7_defconfig: add ARCH_MILBEAUT and ARCH_MILBEAUT_M10V
  ARM: configs: Add Milbeaut M10V defconfig
  ARM: dts: milbeaut: Add device tree set for the Milbeaut M10V board
  clocksource/drivers/timer-milbeaut: Introduce timer for Milbeaut SoCs
  dt-bindings: timer: Add Milbeaut M10V timer description
  ARM: milbeaut: Add basic support for Milbeaut m10v SoC
  dt-bindings: Add documentation for Milbeaut SoCs
  dt-bindings: arm: Add SMP enable-method for Milbeaut
  dt-bindings: sram: milbeaut: Add binding for Milbeaut smp-sram

Link: https://lore.kernel.org/linux-arm-kernel/1551243056-10521-1-git-send-email-sugaya.taichi@socionext.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:21:04 +01:00
Catalin Marinas
3cd0ddb3de Revert "arm64: uaccess: Implement unsafe accessors"
This reverts commit 0bd3ef34d2.

There is ongoing work on objtool to identify incorrect uses of
user_access_{begin,end}. Until this is sorted, do not enable the
functionality on arm64. Also, on ARMv8.2 CPUs with hardware PAN and UAO
support, there is no obvious performance benefit to the unsafe user
accessors.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-03-01 14:19:06 +00:00
Sugaya Taichi
2781204594 ARM: multi_v7_defconfig: add ARCH_MILBEAUT and ARCH_MILBEAUT_M10V
Add and enable the Milbeaut M10V architecture. These configs select those
of the clock, timer and serial driver for M10V.

Signed-off-by: Sugaya Taichi <sugaya.taichi@socionext.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:18:54 +01:00
Sugaya Taichi
4d0eacb02b ARM: configs: Add Milbeaut M10V defconfig
This patch adds the minimal defconfig for the Milbeaut M10V.

Signed-off-by: Sugaya Taichi <sugaya.taichi@socionext.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:18:54 +01:00
Sugaya Taichi
bbaad14423 ARM: dts: milbeaut: Add device tree set for the Milbeaut M10V board
Add devicetree for Milbeaut M10V SoC and M10V Evaluation board.

Signed-off-by: Sugaya Taichi <sugaya.taichi@socionext.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:18:54 +01:00
Sugaya Taichi
9fb29c734f ARM: milbeaut: Add basic support for Milbeaut m10v SoC
This adds the basic M10V SoC support under arch/arm.
Since all cores are activated in the custom bootloader before booting
linux, it is necessary to wait for the secondary-cores using cpu-enable-
method and special sram.

Signed-off-by: Sugaya Taichi <sugaya.taichi@socionext.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:18:26 +01:00
Marek Szyprowski
a3238924a8 ARM: dts: exynos: Fix max voltage for buck8 regulator on Odroid XU3/XU4
The maximum voltage value for buck8 regulator on Odroid XU3/XU4 boards is
set too low. Increase it to the 2000mV as specified on the board schematic.
So far the board worked fine, because of the bug in the PMIC driver, which
used incorrect step value for that regulator. It interpreted the voltage
value set by the bootloader as 1225mV and kept it unchanged. The regulator
driver has been however fixed recently in the commit 56b5d4ea77
("regulator: s2mps11: Fix steps for buck7, buck8 and LDO35"), what results
in reading the proper buck8 value and forcing it to 1500mV on boot. This
is not enough for proper board operation and results in eMMC errors during
heavy IO traffic. Increasing maximum voltage value for buck8 restores
original driver behavior and fixes eMMC issues.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixes: 86a2d2ac5e ("ARM: dts: Add dts file for Odroid XU3 board")
Fixes: 56b5d4ea77 ("regulator: s2mps11: Fix steps for buck7, buck8 and LDO35")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:10:30 +01:00
Linus Walleij
31b0067e8d ARM: spear3xx_defconfig: Activate PL111 DRM driver
This disables the old FBDEV driver and enables the PL111
DRM driver on the SPEAr3xx.

There are some device trees in the kernel that switches
the DT node for the PL110 to "okay" but none of these
have any display defined, so we can safely switch to this
driver before we get any users starting to define
displays. Let them do it on top of the new driver
infrastructure instead.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:09:21 +01:00
Arnd Bergmann
6089e65618 Merge tag 'qcom-fixes-for-5.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into arm/fixes
Qualcomm ARM64 Fixes for 5.0-rc8

* Fix TZ memory area size to avoid crashes during boot

* tag 'qcom-fixes-for-5.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  arm64: dts: qcom: msm8998: Extend TZ reserved memory area
2019-03-01 15:08:16 +01:00
Linus Walleij
00c15bb031 ARM: nhk8815_defconfig: Add new options
This adds some new driver options to the Nomadik NHK8815 defconfig:
- Activate IIO driver
- Enable CMA for coherent graphics allocations
- Activate DRM framebuffer driver for PL111
- Activate DRM panel driver for TPO TPG110
- Activate SPI GPIO driver (talks to the display)
- Activate STMPE PWM driver (used for display backlight)
- Activate PWM backlight
- Activate STw481x driver (PMIC)

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:07:23 +01:00
Linus Walleij
2be5274609 ARM: nhk8815_defconfig: Update defconfig
This updates the NHK8815 defconfig to reflect the recent
structural changes in Kconfigs all over the kernel:

- PREEMPT option was moved around
- MODULES options were moved around
- MTD_NAND options were moved around
- INPUT_MOUSEDEV doesn't have to be explicitly unselected
  anymore (not on by default)
- DEBUG_GPIO should really not be in any default config
- MMC_BLOCK_BOUNCE is gone from Kconfig
- CRYPTO options were moved around

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:07:10 +01:00
Arnd Bergmann
f1685af78c ARM: pxa: remove CONFIG_SND_PXA2XX_AC97 in pxa_defconfig
The CONFIG_SND_PXA2XX_AC97 driver is for the old AC97 bus implementation,
and conflicts with all the new-style AC97 drivers after the conversion,
so the drivers we want all get turned off.

Not disabling the symbol however does the right thing, and we get
the drivers that are selectively enabled here.

Fixes: 25540f68c8 ("ASoC: pxa: change ac97 dependencies")
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-03-01 15:02:26 +01:00
Nicholas Piggin
bd3524feac powerpc/64s: Fix unrelocated interrupt trampoline address test
The recent commit got this test wrong, it declared the assembler
symbols the wrong way, and also used the wrong symbol name
(xxx_start rather than start_xxx, see asm/head-64.h).

Fixes: ccd477028a ("powerpc/64s: Fix HV NMI vs HV interrupt recoverability test")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-03-02 00:25:47 +11:00
Maya Nakamura
c8ccf7599d PCI: hv: Refactor hv_irq_unmask() to use cpumask_to_vpset()
Remove the duplicate implementation of cpumask_to_vpset() and use the
shared implementation. Export hv_max_vp_index, which is required by
cpumask_to_vpset().

Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
2019-03-01 11:45:46 +00:00
Joerg Roedel
d05e4c8600 Merge branches 'iommu/fixes', 'arm/msm', 'arm/tegra', 'arm/mediatek', 'x86/vt-d', 'x86/amd', 'hyper-v' and 'core' into next 2019-03-01 11:24:51 +01:00
Vasily Gorbik
6d85dac2ab s390: warn about clearing als implied facilities
Add a warning about removing required architecture level set facilities
via "facilities=" command line option.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2019-03-01 08:00:42 +01:00