Messages in this thread | | | Subject | Re: [PATCH] KVM: vmx: add mismatched size in vmcs_check32 | From | Paolo Bonzini <> | Date | Thu, 8 Apr 2021 18:28:45 +0200 |
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On 08/04/21 18:05, Sean Christopherson wrote: > Add compile-time assertions in vmcs_check32() to disallow accesses to > 64-bit and 64-bit high fields via vmcs_{read,write}32(). Upper level > KVM code should never do partial accesses to VMCS fields. KVM handles > the split accesses automatically in vmcs_{read,write}64() when running > as a 32-bit kernel.
KVM also uses raw vmread/vmwrite (__vmcs_readl/__vmcs_writel) when copying to and from the shadow VMCS, so that path will not go through vmcs_check32 either.
Paolo
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