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| author | H. Peter Anvin (Intel) <[email protected]> | 2023-01-11 23:20:32 -0800 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2023-01-13 10:07:27 +0100 |
| commit | 92cbbadf73f45c5d8bb26ed8668ff59671ff21e6 (patch) | |
| tree | af1ce62216d2f0aa7051471fa8704f14a4288b06 /tools/perf/scripts/python/syscall-counts.py | |
| parent | ae53fa18703000f507107df43efd1168a0365361 (diff) | |
x86/gsseg: Use the LKGS instruction if available for load_gs_index()
The LKGS instruction atomically loads a segment descriptor into the
%gs descriptor registers, *except* that %gs.base is unchanged, and the
base is instead loaded into MSR_IA32_KERNEL_GS_BASE, which is exactly
what we want this function to do.
Signed-off-by: H. Peter Anvin (Intel) <[email protected]>
Signed-off-by: Xin Li <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Cc: Andy Lutomirski <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions