From: Chao Gao <chao.gao@intel.com>
To: Keqiang Duan <duankeqiangcym@gmail.com>
Cc: <seanjc@google.com>, <pbonzini@redhat.com>, <kvm@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <stable@vger.kernel.org>,
Qinguang Chen <chenqinguang@kuaishou.com>,
Zhiping Du <duzhiping@kuaishou.com>
Subject: Re: [PATCH v2] KVM: x86: Clear hardware HLT state when userspace makes a vCPU not-halted
Date: Tue, 15 Sep 2026 10:24:34 +0800 [thread overview]
Message-ID: <aqisYqQwC3k6trXb@intel.com> (raw)
In-Reply-To: <20260820123512.87236-1-duankeqiangcym@gmail.com>
On Thu, Aug 20, 2026 at 08:35:12PM +0800, Keqiang Duan wrote:
>Force a vCPU out of its hardware-tracked halted state when userspace puts
>the vCPU into any state other than HALTED via KVM_SET_MP_STATE, i.e. clear
>VMCS.GUEST_ACTIVITY_STATE if it says the vCPU is halted. Add an optional
>kvm_x86_ops hook to do the clearing, as SVM has no equivalent VMCB field.
[snip]
>
>Fixes: caa057a2cad6 ("KVM: X86: Provide a capability to disable HLT intercepts")
>Cc: stable@vger.kernel.org
>Tested-by: Qinguang Chen <chenqinguang@kuaishou.com>
>Signed-off-by: Zhiping Du <duzhiping@kuaishou.com>
>Signed-off-by: Keqiang Duan <duankeqiangcym@gmail.com>
Reviewed-by: Chao Gao <chao.gao@intel.com>
next prev parent reply other threads:[~2026-09-15 2:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-20 12:35 [PATCH v2] KVM: x86: Clear hardware HLT state when userspace makes a vCPU not-halted Keqiang Duan
2026-08-20 12:44 ` keqiang duan
2026-09-09 8:00 ` keqiang duan
2026-09-15 2:24 ` Chao Gao [this message]
2026-09-28 22:54 ` Sean Christopherson
2026-09-29 2:46 ` Keqiang Duan
2026-10-02 21:07 ` Sean Christopherson
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