linux-kernel - Re: [PATCH 0/2] KVM: VMX: Fixes for faults on ENCLS emulation

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Date:   Thu, 6 Apr 2023 09:19:53 +0000
From:   "Huang, Kai" <kai.huang@...el.com>
To:     "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "Christopherson,, Sean" <seanjc@...gle.com>
CC:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "binbin.wu@...ux.intel.com" <binbin.wu@...ux.intel.com>
Subject: Re: [PATCH 0/2] KVM: VMX: Fixes for faults on ENCLS emulation

On Wed, 2023-04-05 at 16:45 -0700, Sean Christopherson wrote:
> Found-by-inspection (when reviewing Binbin's patch) fixes for incorrect
> emulation of faults when KVMintercepts and emulates (sort of) ENCLS.
> 
> Very much compile tested only.  Ideally, someone with SGX hardware can
> confirm that these patches are correct, e.g. my assessment that KVM needs
> to manually check CR0.PG is based purely of SDM pseudocode.

Thanks for the patches.  I don't have a "ready" SGX environment at hand, but
I'll try to test or ask someone else to test after Easter holiday.

> 
> Sean Christopherson (2):
>   KVM: VMX: Inject #GP on ENCLS if vCPU has paging disabled (CR0.PG==0)
>   KVM: VMX: Inject #GP, not #UD, if SGX2 ENCLS leafs are unsupported
> 
>  arch/x86/kvm/vmx/sgx.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> 
> base-commit: 27d6845d258b67f4eb3debe062b7dacc67e0c393
> -- 
> 2.40.0.348.gf938b09366-goog
>