[PATCH 0/5] x86: KVM vdso and clock improvements

From: Andy Lutomirski
Date: Wed Dec 09 2015 - 18:12:24 EST


NB: patch 1 doesn't really belong here, but it makes this a lot
easier for me to test. Patch 1, if it's okay at all, should go
though the kvm tree. The rest should probably go through
tip:x86/vdso once they're reviewed.

I'll do a followup to enable vdso pvclock on 32-bit guests.
I'm not currently set up to test it. (The KVM people could also
do it very easily on top of these patches.)

Andy Lutomirski (5):
x86/kvm: On KVM re-enable (e.g. after suspend), update clocks
x86, vdso, pvclock: Simplify and speed up the vdso pvclock reader
x86/vdso: Get pvclock data from the vvar VMA instead of the fixmap
x86/vdso: Remove pvclock fixmap machinery
x86/vdso: Enable vdso pvclock access on all vdso variants

arch/x86/entry/vdso/vclock_gettime.c | 151 ++++++++++++++++------------------
arch/x86/entry/vdso/vdso-layout.lds.S | 3 +-
arch/x86/entry/vdso/vdso2c.c | 3 +
arch/x86/entry/vdso/vma.c | 14 ++++
arch/x86/include/asm/fixmap.h | 5 --
arch/x86/include/asm/pvclock.h | 14 ++--
arch/x86/include/asm/vdso.h | 1 +
arch/x86/kernel/kvmclock.c | 11 ++-
arch/x86/kernel/pvclock.c | 24 ------
arch/x86/kvm/x86.c | 75 +----------------
10 files changed, 110 insertions(+), 191 deletions(-)

--
2.5.0

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