Messages in this thread | | | Date | Wed, 28 Jun 2023 16:19:11 +0800 | Subject | Re: [PATCH v1 2/6] KVM: x86: Virtualize CR4.LASS | From | Zeng Guang <> |
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On 6/28/2023 1:43 AM, Sean Christopherson wrote: > On Thu, Jun 01, 2023, Zeng Guang wrote: >> Virtualize CR4.LASS[bit 27] under KVM control instead of being guest-owned >> as CR4.LASS generally set once for each vCPU at boot time and won't be >> toggled at runtime. Besides, only if VM has LASS capability enumerated with >> CPUID.(EAX=07H.ECX=1):EAX.LASS[bit 6], KVM allows guest software to be able >> to set CR4.LASS. >> >> Updating cr4_fixed1 to set CR4.LASS bit in the emulated IA32_VMX_CR4_FIXED1 >> MSR for guests and allow guests to enable LASS in nested VMX operaion as well. > s/operaion/operation. Will fix in next version. Thanks.
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