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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2010-05-14 12:48:19 +0100
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2010-07-26 23:13:25 -0700
commit409771d258e9dd71c30f3c9520fd2b796ffc40f0 (patch)
tree68678275563114e9d381ae587fc80bd4d34a7e90 /crypto/lrw.c
parent99ad198c4978036bb9f7ebd11618b225b77046da (diff)
downloadblackbird-op-linux-409771d258e9dd71c30f3c9520fd2b796ffc40f0.tar.gz
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x86: Use xen_vcpuop_clockevent, xen_clocksource and xen wallclock.
Use xen_vcpuop_clockevent instead of hpet and APIC timers as main clockevent device on all vcpus, use the xen wallclock time as wallclock instead of rtc and use xen_clocksource as clocksource. The pv clock algorithm needs to work correctly for the xen_clocksource and xen wallclock to be usable, only modern Xen versions offer a reliable pv clock in HVM guests (XENFEAT_hvm_safe_pvclock). Using the hpet as clocksource means a VMEXIT every time we read/write to the hpet mmio addresses, pvclock give us a better rating without VMEXITs. Same goes for the xen wallclock and xen_vcpuop_clockevent Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Don Dutile <ddutile@redhat.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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