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(parent: 40bc47b) | patch
KVM: x86: Expose XSAVEERPTR to the guest
authorSebastian Andrzej Siewior <bigeasy@linutronix.de>
Wed, 25 Sep 2019 21:37:21 +0000 (23:37 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 26 Sep 2019 11:20:55 +0000 (13:20 +0200)
commit504ce1954fba888936c9d13ccc1e3db9b8f613d5
treedb518fe49d637b5730ba70f41bb1e28af3e415bctree | snapshot
parent40bc47b08b6efc8b64fef77cb46974f634215425commit | diff
KVM: x86: Expose XSAVEERPTR to the guest

I was surprised to see that the guest reported `fxsave_leak' while the
host did not. After digging deeper I noticed that the bits are simply
masked out during enumeration.

The XSAVEERPTR feature is actually a bug fix on AMD which means the
kernel can disable a workaround.

Pass XSAVEERPTR to the guest if available on the host.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/cpuid.c diff | blob | history
John Crispins staging tree