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Wed, 22 Jul 2026 21:55:04 +0000 Message-ID: <4940a374-abe7-4ca8-b205-9259f4e92bac@intel.com> Date: Wed, 22 Jul 2026 14:55:04 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 09/20] KVM: nVMX: Propagate extended instruction information To: CC: References: <20260720171949.498680-1-chang.seok.bae@intel.com> <20260720171949.498680-10-chang.seok.bae@intel.com> <20260720181053.B653A1F000E9@smtp.kernel.org> Content-Language: en-US From: "Chang S. 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>> vmcs12->vm_exit_instruction_len = exit_insn_len; >> vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); >> + /* >> + * The APX enumeration guarantees the presence of the extended >> + * fields. This CPUID bit alone is sufficient to rely on it. >> + */ >> + if (guest_cpu_cap_has(vcpu, X86_FEATURE_APX)) >> + vmcs12->extended_instruction_info = vmcs_read64(EXTENDED_INSTRUCTION_INFO); > > [Severity: Medium] > Will this condition ever evaluate to true without first initializing the APX > capability in KVM's supported features? I don't think this can happen with the full series applied. APX is exposed only after the corresponding capability plumbing is in place. Thanks, Chang