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Message-ID: <ZIumMeRxDzzcKpUh@google.com>
Date: Thu, 15 Jun 2023 17:00:49 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Yang Weijiang <weijiang.yang@...el.com>
Cc: pbonzini@...hat.com, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org, peterz@...radead.org,
rppt@...nel.org, binbin.wu@...ux.intel.com,
rick.p.edgecombe@...el.com, john.allen@....com
Subject: Re: [PATCH v3 00/21] Enable CET Virtualization
On Thu, Jun 15, 2023, Sean Christopherson wrote:
> Your cover letter from v2 back in April said the same thing. Why hasn't the patch
> been posted? And what exactly is the issue? IIUC, setting CR4.CET with
> MSR_IA32_S_CET=0 and MSR_IA32_U_CET=0 should be a nop, which suggests that there's
> a KVM bug. And if that's the case, the next obvious questions is, why are you
> posting known buggy code?
Ah, is the problem that the test doesn't set CR0.WP as required by CR4.CET=1?
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