Stephane Eranian ce1b98a305 perf/x86: Fix LBR related crashes on Intel Atom ...

commit 6fc2e83077 upstream.

This patches fixes the LBR kernel crashes on Intel Atom.

The kernel was assuming that if the CPU supports 64-bit format
LBR, then it has an LBR_SELECT MSR. Atom uses 64-bit LBR format
but does not have LBR_SELECT. That was causing NULL pointer
dereferences in a couple of places.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: kan.liang@intel.com
Fixes: 96f3eda67f ("perf/x86/intel: Fix static checker warning in lbr enable")
Link: http://lkml.kernel.org/r/1449182000-31524-2-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Denys Zagorui <dzagorui@cisco.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-08-24 17:02:36 -07:00

..

alpha

osf_wait4(): fix infoleak

2017-05-25 14:30:17 +02:00

arc

mm: larger stack guard gap, between vmas

2017-06-26 07:13:11 +02:00

arm

KVM: arm/arm64: Handle hva aging while destroying the vm

2017-08-12 19:29:09 -07:00

arm64

mm: revert x86_64 and arm64 ELF_ET_DYN_BASE base changes

2017-08-24 17:02:35 -07:00

avr32

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blackfin

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c6x

c6x/ptrace: Remove useless PTRACE_SETREGSET implementation

2017-03-31 09:49:53 +02:00

cris

cris: Only build flash rescue image if CONFIG_ETRAX_AXISFLASHMAP is selected

2017-01-12 11:22:48 +01:00

frv

mm: larger stack guard gap, between vmas

2017-06-26 07:13:11 +02:00

h8300

h8300/ptrace: Fix incorrect register transfer count

2017-03-31 09:49:53 +02:00

hexagon

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ia64

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m32r

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m68k

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metag

metag/uaccess: Check access_ok in strncpy_from_user

2017-05-25 14:30:16 +02:00

microblaze

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mips

MIPS: Fix a typo: s/preset/present/ in r2-to-r6 emulation error message

2017-07-27 15:06:08 -07:00

mn10300

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nios2

nios2: reserve boot memory for device tree

2017-04-12 12:38:34 +02:00

openrisc

openrisc: Add _text symbol to fix ksym build error

2017-08-06 19:19:45 -07:00

parisc

parisc/mm: Ensure IRQs are off in switch_mm()

2017-07-21 07:44:56 +02:00

powerpc

Revert "powerpc/numa: Fix percpu allocations to be NUMA aware"

2017-08-06 19:19:40 -07:00

s390

bpf, s390: fix jit branch offset related to ldimm64

2017-08-12 19:29:08 -07:00

score

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sh

mm: larger stack guard gap, between vmas

2017-06-26 07:13:11 +02:00

sparc

sparc64: Prevent perf from running during super critical sections

2017-08-12 19:29:09 -07:00

tile

mm: larger stack guard gap, between vmas

2017-06-26 07:13:11 +02:00

um

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unicore32

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x86

perf/x86: Fix LBR related crashes on Intel Atom

2017-08-24 17:02:36 -07:00

xtensa

mm: larger stack guard gap, between vmas

2017-06-26 07:13:11 +02:00

.gitignore

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Kconfig

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