https://github.com/torvalds/linux
Revision 5ea3f6fb37b79da33ac9211df336fd2b9f47c39f authored by Zhenzhong Duan on 25 July 2019, 02:39:26 UTC, committed by Ingo Molnar on 25 July 2019, 13:41:30 UTC
check_msr is used to fix a bug report in guest where KVM doesn't support
LBR MSR and cause #GP.
The msr check is bypassed on real HW to workaround a false failure,
see commit d0e1a507bdc7 ("perf/x86/intel: Disable check_msr for real HW")
When running a guest with CONFIG_HYPERVISOR_GUEST not set or "nopv"
enabled, current check isn't enough and #GP could trigger.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1564022366-18293-1-git-send-email-zhenzhong.duan@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 parent 3b238a6
Tip revision: 5ea3f6fb37b79da33ac9211df336fd2b9f47c39f authored by Zhenzhong Duan on 25 July 2019, 02:39:26 UTC
perf/x86: Apply more accurate check on hypervisor platform
perf/x86: Apply more accurate check on hypervisor platform
Tip revision: 5ea3f6f
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | -rw-r--r-- | 14.6 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 71 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.6 KB |
| .mailmap | -rw-r--r-- | 12.0 KB |
| COPYING | -rw-r--r-- | 423 bytes |
| CREDITS | -rw-r--r-- | 97.1 KB |
| Kbuild | -rw-r--r-- | 1.5 KB |
| Kconfig | -rw-r--r-- | 595 bytes |
| MAINTAINERS | -rw-r--r-- | 509.8 KB |
| Makefile | -rw-r--r-- | 59.1 KB |
| README | -rw-r--r-- | 727 bytes |
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