linux-kernel - Re: [PATCH 1/2] KVM: nVMX: fix CR4_READ_SHADOW when L0 updates CR4 during a signal

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Date: Wed, 8 May 2024 13:27:55 +0000
From: Thomas Prescher <thomas.prescher@...erus-technology.de>
To: "seanjc@...gle.com" <seanjc@...gle.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>, "dave.hansen@...ux.intel.com"
	<dave.hansen@...ux.intel.com>, "hpa@...or.com" <hpa@...or.com>, Julian
 Stecklina <julian.stecklina@...erus-technology.de>, "tglx@...utronix.de"
	<tglx@...utronix.de>, "bp@...en8.de" <bp@...en8.de>, "mingo@...hat.com"
	<mingo@...hat.com>, "pbonzini@...hat.com" <pbonzini@...hat.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH 1/2] KVM: nVMX: fix CR4_READ_SHADOW when L0 updates CR4
 during a signal

On Thu, 2024-04-18 at 11:28 -0700, Sean Christopherson wrote:
> > Allright. I will propose a patch that sets the
> > KVM_RUN_X86_GUEST_MODE
> > flag in the next couple of days. Do we also need a new capability
> > for
> > this flag so userland can query whether this field is actually
> > updated
> > by KVM?
> 
> Hmm, yeah, I don't see any way around that.

Hi Sean,

we have submitted a new patch:
https://lore.kernel.org/kvm/20240508132502.184428-1-julian.stecklina@cyberus-technology.de/T/#u