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| author | Glauber Costa <glommer@redhat.com> | 2010-05-11 12:17:39 -0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-05-19 11:40:59 +0300 |
| commit | 424c32f1aa3112632a657d45698c8e7666668f78 (patch) | |
| tree | c63fd6d83b6f2cbcb979b3f55c9a07425b13053f /arch/x86/include/asm/pvclock.h | |
| parent | b69e8caef5b190af48c525f6d715e7b7728a77f6 (diff) | |
| download | linux-424c32f1aa3112632a657d45698c8e7666668f78.tar.bz2 | |
x86, paravirt: Enable pvclock flags in vcpu_time_info structure
This patch removes one padding byte and transform it into a flags
field. New versions of guests using pvclock will query these flags
upon each read.
Flags, however, will only be interpreted when the guest decides to.
It uses the pvclock_valid_flags function to signal that a specific
set of flags should be taken into consideration. Which flags are valid
are usually devised via HV negotiation.
Signed-off-by: Glauber Costa <glommer@redhat.com>
CC: Jeremy Fitzhardinge <jeremy@goop.org>
Acked-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/pvclock.h')
| -rw-r--r-- | arch/x86/include/asm/pvclock.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h index 53235fd5f8ce..cd02f324aa6b 100644 --- a/arch/x86/include/asm/pvclock.h +++ b/arch/x86/include/asm/pvclock.h @@ -6,6 +6,7 @@ /* some helper functions for xen and kvm pv clock sources */ cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src); +void pvclock_set_flags(u8 flags); unsigned long pvclock_tsc_khz(struct pvclock_vcpu_time_info *src); void pvclock_read_wallclock(struct pvclock_wall_clock *wall, struct pvclock_vcpu_time_info *vcpu, |