[PATCH 0/2] x86/vdso: RDPID support and a test

[Andy Lutomirski]

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

-- 
2.7.4