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| author | Gerd Hoffmann <kraxel@redhat.com> | 2008-06-03 16:17:29 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-06-24 20:02:31 +0200 |
| commit | 7af192c954017499ec163bc9dbaaee2e593d7ef2 (patch) | |
| tree | 04e28552d1e1e265443933e3e658949170997c0e /include/asm-x86/pvclock.h | |
| parent | KVM: VMX: Fix host msr corruption with preemption enabled (diff) | |
| download | linux-7af192c954017499ec163bc9dbaaee2e593d7ef2.tar.xz linux-7af192c954017499ec163bc9dbaaee2e593d7ef2.zip | |
x86: Add structs and functions for paravirt clocksource
This patch adds structs for the paravirt clocksource ABI
used by both xen and kvm (pvclock-abi.h).
It also adds some helper functions to read system time and
wall clock time from a paravirtual clocksource (pvclock.[ch]).
They are based on the xen code. They are enabled using
CONFIG_PARAVIRT_CLOCK.
Subsequent patches of this series will put the code in use.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to '')
| -rw-r--r-- | include/asm-x86/pvclock.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-x86/pvclock.h b/include/asm-x86/pvclock.h new file mode 100644 index 000000000000..85b1bba8e0a3 --- /dev/null +++ b/include/asm-x86/pvclock.h @@ -0,0 +1,13 @@ +#ifndef _ASM_X86_PVCLOCK_H_ +#define _ASM_X86_PVCLOCK_H_ + +#include <linux/clocksource.h> +#include <asm/pvclock-abi.h> + +/* some helper functions for xen and kvm pv clock sources */ +cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src); +void pvclock_read_wallclock(struct pvclock_wall_clock *wall, + struct pvclock_vcpu_time_info *vcpu, + struct timespec *ts); + +#endif /* _ASM_X86_PVCLOCK_H_ */ |