Andy Lutomirski 8c84014f3b x86/entry: Remove exception_enter() from most trap handlers ...

On 64-bit kernels, we don't need it any more: we handle context
tracking directly on entry from user mode and exit to user mode.

On 32-bit kernels, we don't support context tracking at all, so
these callbacks had no effect.

Note: this doesn't change do_page_fault().  Before we do that,
we need to make sure that there is no code that can page fault
from kernel mode with CONTEXT_USER.  The 32-bit fast system call
stack argument code is the only offender I'm aware of right now.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/ae22f4dfebd799c916574089964592be218151f9.1435952415.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2015-07-07 10:59:09 +02:00

..

acpi

Merge tag 'pm+acpi-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2015-06-23 14:18:07 -07:00

apic

x86/asm/tsc: Rename native_read_tsc() to rdtsc()

2015-07-06 15:23:28 +02:00

cpu

x86/entry: Remove exception_enter() from most trap handlers

2015-07-07 10:59:09 +02:00

fpu

x86/fpu: Fix boot crash in the early FPU code

2015-07-04 10:05:56 +02:00

kprobes

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-04-14 14:37:47 -07:00

.gitignore

…

alternative.c

Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-06-22 17:59:09 -07:00

amd_gart_64.c

x86: enable DMA CMA with swiotlb

2014-06-04 16:53:57 -07:00

amd_nb.c

x86/gart: Check for GART support before accessing GART registers

2015-05-06 11:15:53 +02:00

apb_timer.c

x86/asm/tsc: Rename native_read_tsc() to rdtsc()

2015-07-06 15:23:28 +02:00

aperture_64.c

x86/gart: Check for GART support before accessing GART registers

2015-05-06 11:15:53 +02:00

apm_32.c

cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic

2014-11-12 21:17:27 +01:00

asm-offsets_32.c

x86: Remove unused TI_cpu

2015-05-05 20:48:02 +02:00

asm-offsets_64.c

x86/asm/entry: (Re-)rename __NR_entry_INT80_compat_max to __NR_syscall_compat_max

2015-06-08 23:43:38 +02:00

asm-offsets.c

x86: Merge common 32-bit values in asm-offsets.c

2015-05-05 20:48:02 +02:00

audit_64.c

x86: hook up execveat system call

2014-12-13 12:42:51 -08:00

bootflag.c

x86: don't use module_init for non-modular core bootflag code

2015-06-16 14:12:34 -04:00

check.c

mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute

2015-06-24 17:49:44 -07:00

cpuid.c

x86, cpuid: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:51 -07:00

crash_dump_32.c

…

crash_dump_64.c

…

crash.c

x86/mm: Decouple <linux/vmalloc.h> from <asm/io.h>

2015-06-03 12:02:00 +02:00

devicetree.c

Merge tag 'module_init-device_initcall-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2015-07-02 10:30:48 -07:00

doublefault.c

x86: Delete non-required instances of include <linux/init.h>

2014-01-06 21:25:18 -08:00

dumpstack_32.c

Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-04-13 13:23:34 -07:00

dumpstack_64.c

x86/kernel: Use kstack_end() in dumpstack_64.c

2015-02-23 18:37:13 +01:00

dumpstack.c

Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-04-13 13:23:34 -07:00

e820.c

Merge tag 'libnvdimm-for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm

2015-06-29 10:34:42 -07:00

early_printk.c

Merge tag 'tty-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2015-04-21 09:33:10 -07:00

early-quirks.c

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

2015-06-26 13:18:51 -07:00

espfix_64.c

x86/asm/tsc: Rename native_read_tsc() to rdtsc()

2015-07-06 15:23:28 +02:00

ftrace.c

module: remove mod arg from module_free, rename module_memfree().

2015-01-20 11:38:33 +10:30

head32.c

x86: Store a per-cpu shadow copy of CR4

2015-02-04 12:10:42 +01:00

head64.c

x86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers

2015-06-02 09:39:40 +02:00

head_32.S

Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-06-22 17:59:09 -07:00

head_64.S

x86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers

2015-06-02 09:39:40 +02:00

head.c

…

hpet.c

x86/asm/tsc: Rename native_read_tsc() to rdtsc()

2015-07-06 15:23:28 +02:00

hw_breakpoint.c

perf/x86: Remove get_hbp_len and replace with bp_len

2014-12-03 15:14:30 +01:00

i386_ksyms_32.c

preempt: Use preempt_schedule_context() as the official tracing preemption point

2015-06-07 15:57:42 +02:00

i8237.c

…

i8253.c

…

i8259.c

x86/asm/entry/irq: Clean up IRQn_VECTOR macros

2015-05-10 12:34:28 +02:00

io_delay.c

…

ioport.c

x86/asm/entry: Rename 'init_tss' to 'cpu_tss'

2015-03-06 08:32:58 +01:00

iosf_mbi.c

x86/platform/intel/iosf: Add debugfs config option for IOSF

2014-09-19 13:08:43 +02:00

irq_32.c

x86/irq: Merge irq_regs & irq_stat

2015-05-10 12:34:27 +02:00

irq_64.c

x86/irq: Merge irq_regs & irq_stat

2015-05-10 12:34:27 +02:00

irq_work.c

x86: Consolidate irq entering inlines

2015-05-15 16:04:49 +02:00

irq.c

Merge branch 'x86/ras' into x86/core, to fix conflicts

2015-06-07 15:35:27 +02:00

irqinit.c

Merge branch 'x86/ras' into x86/core, to fix conflicts

2015-06-07 15:35:27 +02:00

jump_label.c

…

kdebugfs.c

…

kexec-bzimage64.c

x86/kexec: prepend elfcorehdr instead of appending it to the crash-kernel command-line.

2015-06-30 19:44:57 -07:00

kgdb.c

Merge tag 'v4.0-rc7' into x86/asm, to resolve conflicts

2015-04-08 09:01:54 +02:00

ksysfs.c

x86: ksysfs.c build fix

2014-01-03 14:37:13 +00:00

kvm.c

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2015-06-24 09:36:49 -07:00

kvmclock.c

x86: kvmclock: set scheduler clock stable

2015-05-29 14:01:52 +02:00

ldt.c

Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option"

2014-05-21 10:22:59 -07:00

livepatch.c

livepatch: kernel: add support for live patching

2014-12-22 15:40:49 +01:00

machine_kexec_32.c

x86, irq: Move IOAPIC related declarations from hw_irq.h into io_apic.h

2014-12-16 14:08:17 +01:00

machine_kexec_64.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching

2015-06-23 14:07:26 -07:00

Makefile

x86/compat: Move copy_siginfo_*_user32() to signal_compat.c

2015-07-06 15:28:55 +02:00

mcount_64.S

ftrace/fgraph/x86: Have prepare_ftrace_return() take ip as first parameter

2014-12-01 14:08:58 -05:00

mmconf-fam10h_64.c

…

module.c

x86/mm/KASLR: Propagate KASLR status to kernel proper

2015-04-03 15:26:15 +02:00

mpparse.c

x86: Cleanup irq_domain ops

2015-04-24 15:36:55 +02:00

msr.c

x86, msr: Use seek definitions instead of hard-coded values

2014-10-17 13:40:55 -07:00

nmi_selftest.c

…

nmi.c

kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation

2014-04-24 10:26:38 +02:00

paravirt_patch_32.c

x86/asm/tsc, x86/paravirt: Remove read_tsc() and read_tscp() paravirt hooks

2015-07-06 15:23:26 +02:00

paravirt_patch_64.c

Merge branch 'locking/core' into x86/core, to prepare for dependent patch

2015-06-03 10:07:35 +02:00

paravirt-spinlocks.c

locking/pvqspinlock: Rename QUEUED_SPINLOCK to QUEUED_SPINLOCKS

2015-05-11 09:52:09 +02:00

paravirt.c

x86/asm/tsc, x86/paravirt: Remove read_tsc() and read_tscp() paravirt hooks

2015-07-06 15:23:26 +02:00

pci-calgary_64.c

x86, calgary: Use 8M TCE table size by default

2014-04-10 19:51:32 -07:00

pci-dma.c

x86: Deinline dma_free_attrs()

2015-05-05 20:48:02 +02:00

pci-iommu_table.c

…

pci-nommu.c

x86: Delete non-required instances of include <linux/init.h>

2014-01-06 21:25:18 -08:00

pci-swiotlb.c

x86/swiotlb: Try coherent allocations with __GFP_NOWARN

2015-06-11 08:28:38 +02:00

pcspeaker.c

…

perf_regs.c

perf/x86/64: Report regs_user->ax too in get_regs_user()

2015-04-11 13:08:53 +02:00

pmc_atom.c

x86: pmc_atom: Expose contents of PSS

2015-01-20 12:50:14 +01:00

pmem.c

libnvdimm: Set numa_node to NVDIMM devices

2015-06-26 11:23:38 -04:00

probe_roms.c

…

process_32.c

x86: opt into HAVE_COPY_THREAD_TLS, for both 32-bit and 64-bit

2015-06-30 19:45:01 -07:00

process_64.c

x86/compat: Rename 'start_thread_ia32' to 'compat_start_thread'

2015-07-06 15:28:56 +02:00

process.c

Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-06-22 17:16:11 -07:00

ptrace.c

x86/entry: Move C entry and exit code to arch/x86/entry/common.c

2015-07-07 10:59:05 +02:00

pvclock.c

x86: pvclock: Really remove the sched notifier for cross-cpu migrations

2015-04-27 15:49:30 +02:00

quirks.c

x86: HPET force enable for e6xx based systems

2014-09-15 17:53:35 -07:00

reboot_fixups_32.c

…

reboot.c

x86/reboot: Add ASRock Q1900DC-ITX mainboard reboot quirk

2015-04-01 14:08:09 +02:00

relocate_kernel_32.S

x86/asm: Optimize unnecessarily wide TEST instructions

2015-03-07 11:12:43 +01:00

relocate_kernel_64.S

x86/asm: Replace "MOVQ $imm, %reg" with MOVL

2015-04-01 13:17:39 +02:00

resource.c

x86: don't exclude low BIOS area when allocating address space for non-PCI cards

2014-07-16 12:29:36 -06:00

rtc.c

kernel.h: remove ancient __FUNCTION__ hack

2015-02-12 18:54:13 -08:00

setup_percpu.c

x86: Convert a few more per-CPU items to read-mostly ones

2014-11-04 20:13:28 +01:00

setup.c

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-07-04 08:58:50 -07:00

signal_compat.c

x86/compat: Move copy_siginfo_*_user32() to signal_compat.c

2015-07-06 15:28:55 +02:00

signal.c

x86/entry: Move C entry and exit code to arch/x86/entry/common.c

2015-07-07 10:59:05 +02:00

smp.c

x86: Consolidate irq entering inlines

2015-05-15 16:04:49 +02:00

smpboot.c

Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-06-22 17:59:09 -07:00

stacktrace.c

…

step.c

…

sys_x86_64.c

x86/mm: Improve AMD Bulldozer ASLR workaround

2015-03-31 10:01:17 +02:00

sysfb_efi.c

…

sysfb_simplefb.c

x86/simplefb: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:52 -07:00

sysfb.c

x86/sysfb: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:52 -07:00

tboot.c

…

tce_64.c

…

test_nx.c

…

test_rodata.c

treewide: Fix typo in printk messages

2015-03-06 23:05:39 +01:00

time.c

x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'

2015-03-23 11:14:17 +01:00

tls.c

x86, tls: Interpret an all-zero struct user_desc as "no segment"

2015-01-22 21:45:07 +01:00

tls.h

…

topology.c

…

trace_clock.c

x86/asm/tsc: Add rdtsc_ordered() and use it in trivial call sites

2015-07-06 15:23:29 +02:00

tracepoint.c

…

traps.c

x86/entry: Remove exception_enter() from most trap handlers

2015-07-07 10:59:09 +02:00

tsc_msr.c

x86: tsc: Add missing Baytrail frequency to the table

2014-02-19 17:12:24 +01:00

tsc_sync.c

x86/asm/tsc/sync: Use rdtsc_ordered() in check_tsc_warp() and drop extra barriers

2015-07-06 15:23:29 +02:00

tsc.c

x86/asm/tsc: Use rdtsc_ordered() in read_tsc() instead of get_cycles()

2015-07-06 15:23:29 +02:00

uprobes.c

x86: Make is_64bit_mm() widely available

2015-06-09 12:24:32 +02:00

verify_cpu.S

…

vm86_32.c

x86/asm/entry: Rename 'init_tss' to 'cpu_tss'

2015-03-06 08:32:58 +01:00

vmlinux.lds.S

x86-64: Use RIP-relative addressing for most per-CPU accesses

2014-11-04 20:43:14 +01:00

vsmp_64.c

x86: replace __init_or_module with __init in non-modular vsmp_64.c

2015-06-16 14:12:41 -04:00

x86_init.c

Merge tag 'pci-v4.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

2015-06-23 13:41:24 -07:00

x8664_ksyms_64.c

preempt: Use preempt_schedule_context() as the official tracing preemption point

2015-06-07 15:57:42 +02:00