Messages in this thread | | | Date | Sat, 11 Dec 2021 02:31:42 +0100 | Subject | Re: [PATCH 15/19] kvm: x86: Save and restore guest XFD_ERR properly | From | Paolo Bonzini <> |
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On 12/11/21 01:10, Thomas Gleixner wrote: > 2) When the guest triggers #NM is takes an VMEXIT and the host > does: > > rdmsrl(MSR_XFD_ERR, vcpu->arch.guest_fpu.xfd_err); > > injects the #NM and goes on. > > 3) When the guest writes to MSR_XFD_ERR it takes an VMEXIT and > the host does: > > vcpu->arch.guest_fpu.xfd_err = msrval; > wrmsrl(MSR_XFD_ERR, msrval);
No wrmsrl here I think, the host value is 0 and should stay so. Instead the wrmsrl will happen the next time the VCPU loop is entred.
Paolo
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