Re: [CFT PATCH 0/2] KVM: support XSAVES usage in the host
From: Nadav Amit
Date: Sun Nov 23 2014 - 03:16:22 EST
Iâll try to check it tomorrow (I donât have access to the failing machine at the moment).
Thanks for the quick response.
> On Nov 21, 2014, at 20:31, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> The first patch ensures that XSAVES is not exposed in the guest until
> we emulate MSR_IA32_XSS. The second exports XSAVE data in the correct
> I tested these on a non-XSAVES system so they should not be completely
> broken, but I need some help. I am not even sure which XSAVE states
> are _not_ enabled, and thus compacted, in Linux.
> Note that these patches do not add support for XSAVES in the guest yet,
> since MSR_IA32_XSS is not emulated.
> If they fix the bug Nadav reported, I'll add Reported-by and commit.
> Paolo Bonzini (2):
> kvm: x86: mask out XSAVES
> KVM: x86: support XSAVES usage in the host
> arch/x86/kvm/cpuid.c | 11 ++++++++++-
> arch/x86/kvm/x86.c | 48 +++++++++++++++++++++++++++++++++++++++++++-----
> 2 files changed, 53 insertions(+), 6 deletions(-)
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