https://github.com/torvalds/linux
Revision 517c3ba00916383af6411aec99442c307c23f684 authored by Zhenzhong Duan on 25 July 2019, 02:39:09 UTC, committed by Thomas Gleixner on 25 July 2019, 10:51:55 UTC
X86_HYPER_NATIVE isn't accurate for checking if running on native platform,
e.g. CONFIG_HYPERVISOR_GUEST isn't set or "nopv" is enabled.

Checking the CPU feature bit X86_FEATURE_HYPERVISOR to determine if it's
running on native platform is more accurate.

This still doesn't cover the platforms on which X86_FEATURE_HYPERVISOR is
unsupported, e.g. VMware, but there is nothing which can be done about this
scenario.

Fixes: 8a4b06d391b0 ("x86/speculation/mds: Add sysfs reporting for MDS")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1564022349-17338-1-git-send-email-zhenzhong.duan@oracle.com
1 parent 643d83f
History
Tip revision: 517c3ba00916383af6411aec99442c307c23f684 authored by Zhenzhong Duan on 25 July 2019, 02:39:09 UTC
x86/speculation/mds: Apply more accurate check on hypervisor platform
Tip revision: 517c3ba
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.clang-format -rw-r--r-- 14.6 KB
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