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| author | Keir Fraser <keir.fraser@citrix.com> | 2010-05-22 06:31:47 +0100 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2010-05-22 06:31:47 +0100 |
| commit | 3f03c620370e99bdf78120ce64580cd715ad150f (patch) | |
| tree | 946d935765f472c31471d5310e7207e717bb035c /xen/common/kernel.c | |
| parent | f3b88f2e646418ad3ed8ce7a19ea32d0b382654a (diff) | |
| download | xen-3f03c620370e99bdf78120ce64580cd715ad150f.tar.gz xen-3f03c620370e99bdf78120ce64580cd715ad150f.tar.bz2 xen-3f03c620370e99bdf78120ce64580cd715ad150f.zip | |
x86: TSC handling cleanups (version 2)
"I am removing the tsc_scaled variable that is never actually used
because when tsc needs to be scaled vtsc is 1. I am also making this
more explicit in tsc_set_info. I am also removing hvm_domain.gtsc_khz
that is a duplicate of d->arch.tsc_khz. I am using scale_delta(delta,
&d->arch.ns_to_vtsc) to scale the tsc value before returning it to the
guest like in the pv case. I added a feature flag to specify that the
pvclock algorithm is safe to be used in an HVM guest so that the guest
can now use it without hanging."
Version 2 fixes a bug which breaks PV domU time.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'xen/common/kernel.c')
| -rw-r--r-- | xen/common/kernel.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/xen/common/kernel.c b/xen/common/kernel.c index f9d1dedb66..61a798df4e 100644 --- a/xen/common/kernel.c +++ b/xen/common/kernel.c @@ -259,6 +259,8 @@ DO(xen_version)(int cmd, XEN_GUEST_HANDLE(void) arg) fi.submap |= (1U << XENFEAT_mmu_pt_update_preserve_ad) | (1U << XENFEAT_highmem_assist) | (1U << XENFEAT_gnttab_map_avail_bits); + else + fi.submap |= (1U << XENFEAT_hvm_safe_pvclock); #endif break; default: |