linux-kernel - Re: [PATCH v9 14/27] KVM: x86: Initialize kvm_caps.supported

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Date: Fri, 26 Jan 2024 09:35:22 +0800
From: Chao Gao <chao.gao@...el.com>
To: Yang Weijiang <weijiang.yang@...el.com>
CC: <seanjc@...gle.com>, <pbonzini@...hat.com>, <dave.hansen@...el.com>,
	<kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
	<yuan.yao@...ux.intel.com>, <peterz@...radead.org>,
	<rick.p.edgecombe@...el.com>, <mlevitsk@...hat.com>, <john.allen@....com>
Subject: Re: [PATCH v9 14/27] KVM: x86: Initialize kvm_caps.supported_xss

On Tue, Jan 23, 2024 at 06:41:47PM -0800, Yang Weijiang wrote:
>Set original kvm_caps.supported_xss to (host_xss & KVM_SUPPORTED_XSS) if
>XSAVES is supported. host_xss contains the host supported xstate feature
>bits for thread FPU context switch, KVM_SUPPORTED_XSS includes all KVM
>enabled XSS feature bits, the resulting value represents the supervisor
>xstates that are available to guest and are backed by host FPU framework
>for swapping {guest,host} XSAVE-managed registers/MSRs.
>
>Signed-off-by: Yang Weijiang <weijiang.yang@...el.com>
>Reviewed-by: Maxim Levitsky <mlevitsk@...hat.com>

Reviewed-by: Chao Gao <chao.gao@...el.com>