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Date:   Mon, 22 May 2023 17:41:26 +0800
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Subject: Re: [RFC PATCH v2 09/11] KVM: VMX: Advertise
 MITI_CTRL_BHB_CLEAR_SEQ_S_SUPPORT
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To:     Chao Gao <chao.gao@intel.com>, <kvm@vger.kernel.org>
CC:     Jiaan Lu <jiaan.lu@intel.com>, Zhang Chen <chen.zhang@intel.com>,
        "Sean Christopherson" <seanjc@google.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, <x86@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>, <linux-kernel@vger.kernel.org>
References: <20230414062545.270178-1-chao.gao@intel.com>
 <20230414062545.270178-10-chao.gao@intel.com>
From:   "Liu, Jingqi" <jingqi.liu@intel.com>
In-Reply-To: <20230414062545.270178-10-chao.gao@intel.com>
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On 4/14/2023 2:25 PM, Chao Gao wrote:
> From: Zhang Chen <chen.zhang@intel.com>
>
> Allow guest to query if the underying VMM understands BHB-clearing
> sequence and report the statue of BHB-clearing sequence in suprevisor
s/statue/status
> mode i.e. CPL < 3 via MSR_VIRTUAL_MITIGATION_ENUM/CTRL.
>
> Enable BHI_DIS_S for guest if guest is using BHI-clearing sequence and
> the sequence isn't effective on the processor.
>
> Signed-off-by: Zhang Chen <chen.zhang@intel.com>
> Signed-off-by: Chao Gao <chao.gao@intel.com>
> Tested-by: Jiaan Lu <jiaan.lu@intel.com>
> ---
Thanks,
Jingqi