linux-kernel - Re: [PATCH v7 07/10] KVM: nVMX: Add a helper to encode VMCS info in MSR_IA32_VMX

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Date: Tue, 21 May 2024 11:16:31 +1200
From: "Huang, Kai" <kai.huang@...el.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini
	<pbonzini@...hat.com>
CC: <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Xiaoyao Li
	<xiaoyao.li@...el.com>, Shan Kang <shan.kang@...el.com>, Xin Li
	<xin3.li@...el.com>, Zhao Liu <zhao1.liu@...el.com>
Subject: Re: [PATCH v7 07/10] KVM: nVMX: Add a helper to encode VMCS info in
 MSR_IA32_VMX_BASIC



On 21/05/2024 5:59 am, Sean Christopherson wrote:
> Add a helper to encode the VMCS revision, size, and supported memory types
> in MSR_IA32_VMX_BASIC, i.e. when synthesizing KVM's supported BASIC MSR
> value, and delete the now unused VMCS size and memtype shift macros.
> 
> For a variety of reasons, KVM has shifted (pun intended) to using helpers
> to *get* information from the VMX MSRs, as opposed to defined MASK and
> SHIFT macros for direct use.  Provide a similar helper for the nested VMX
> code, which needs to *set* information, so that KVM isn't left with a mix
> of SHIFT macros and dedicated helpers.
> 
> Reported-by: Xiaoyao Li <xiaoyao.li@...el.com>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---

Reviewed-by: Kai Huang <kai.huang@...el.com>