On 6/30/2023 11:05 PM, Neiger, Gil wrote:
Intel will not produce any CPU with CET that does not enumerate IA32_VMX_BASIC[56] as 1. One can check that bit before injecting a #CP with error code, but it should not be necessary if CET is enumerated. Of course, if the KVM may run as a guest of another VMM/hypervisor, it may be that the virtual CPU in which KVM operates may enumerate CET but clear the bit in IA32_VMX_BASIC. - Gil
Thanks Gil for clarity!
-----Original Message----- From: Yang, Weijiang <weijiang.yang@xxxxxxxxx> Sent: Friday, June 30, 2023 05:05 To: Gao, Chao <chao.gao@xxxxxxxxx> Cc: Christopherson,, Sean <seanjc@xxxxxxxxxx>; pbonzini@xxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; peterz@xxxxxxxxxxxxx; rppt@xxxxxxxxxx; binbin.wu@xxxxxxxxxxxxxxx; Edgecombe, Rick P <rick.p.edgecombe@xxxxxxxxx>; john.allen@xxxxxxx; Neiger, Gil <gil.neiger@xxxxxxxxx> Subject: Re: [PATCH v3 10/21] KVM:x86: Add #CP support in guest exception classification On 6/30/2023 6:27 PM, Chao Gao wrote: [...]
