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x86-64: Move vread_tsc and vread_hpet into the vDSO

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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>
This commit is contained in:
Andy Lutomirski
2011-07-14 06:47:22 -04:00
committed by H. Peter Anvin
parent 433bd805e5
commit 98d0ac38ca
12 changed files with 57 additions and 79 deletions
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6
arch/x86/include/asm/clocksource.h
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@@ -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 */