linux-kernel - Re: [PATCH v2 6/9] KVM: SVM: Add MSR_IA32_XSS to the GHCB for hypervisor kernel

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Message-ID: <ZjPcytxDWHKLYNsU@google.com>
Date: Thu, 2 May 2024 11:34:50 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Tom Lendacky <thomas.lendacky@....com>
Cc: John Allen <john.allen@....com>, kvm@...r.kernel.org, weijiang.yang@...el.com, 
	rick.p.edgecombe@...el.com, bp@...en8.de, pbonzini@...hat.com, 
	mlevitsk@...hat.com, linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v2 6/9] KVM: SVM: Add MSR_IA32_XSS to the GHCB for
 hypervisor kernel

On Thu, May 02, 2024, Tom Lendacky wrote:
> The hypervisor side could be optimized to compare the value and only update
> the CPUID runtime if those values are different.

Heh, this is exactly the thought I had around dinner time yesterday :-)