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| author |   Andy Lutomirski <luto@mit.edu> | 2011-07-14 06:47:22 -0400 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@linux.intel.com> | 2011-07-14 17:57:05 -0700 |
| commit | 98d0ac38ca7b1b7a552c9a2359174ff84decb600 (patch) | |
| tree | 0c244e828f86c779c348a4888ed9e303c3e59811 /arch/x86/include/asm/clocksource.h | |
| parent | clocksource: Replace vread with generic arch data (diff) | |
| download | linux-dev-98d0ac38ca7b1b7a552c9a2359174ff84decb600.tar.xz linux-dev-98d0ac38ca7b1b7a552c9a2359174ff84decb600.zip | |
x86-64: Move vread_tsc and vread_hpet into the vDSO
The vsyscall page now consists entirely of trap instructions.
Cc: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/637648f303f2ef93af93bae25186e9a1bea093f5.1310639973.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/clocksource.h')
| -rw-r--r-- | arch/x86/include/asm/clocksource.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/include/asm/clocksource.h b/arch/x86/include/asm/clocksource.h index a5df33f614c9..3882c65dc19b 100644 --- a/arch/x86/include/asm/clocksource.h +++ b/arch/x86/include/asm/clocksource.h @@ -7,8 +7,12 @@ #define __ARCH_HAS_CLOCKSOURCE_DATA +#define VCLOCK_NONE 0 /* No vDSO clock available. */ +#define VCLOCK_TSC 1 /* vDSO should use vread_tsc. */ +#define VCLOCK_HPET 2 /* vDSO should use vread_hpet. */ + struct arch_clocksource_data { - cycle_t (*vread)(void); + int vclock_mode; }; #endif /* CONFIG_X86_64 */ |