x86/vdso: RDPID support and a test
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b4 am [email protected]Versions newest first
- v1 Latest2 patches 0 repliesNew
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/2 | x86/vdso: Use RDPID in preference to LSL when availablearch/ arch/ | +7 | 0 replies | |
| 2/2 | selftests/x86: Add test_vdso to test getcputools/ tools/ | +124 | 0 replies |
Reviews trailers per patch
None of the 2 patches has a Reviewed-by or Acked-by.
| Patch | Megha Dey |
|---|---|
| 1/2 | T-b |
| 2/2 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/2] x86/vdso: RDPID support and a test
RDPID is a new instruction in unspecified future Intel processors (sigh) that returns MSR_TSC_AUX. This will finally let the vDSO stop using LSL.
Patch 1 is the meat and patch 2 is the test. Megha has kindly tested them for me, since I don't own an unspecified Intel processor :)
Andy Lutomirski (2):
x86/vdso: Use RDPID in preference to LSL when available selftests/x86: Add test_vdso to test getcpu
arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/vgtod.h | 7 +- tools/testing/selftests/x86/Makefile | 2 +- tools/testing/selftests/x86/test_vdso.c | 123 ++++++++++++++++++++++++++++++++ 4 files changed, 131 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/x86/test_vdso.c
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2.7.4