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[54.240.197.239]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5dc723cff72sm7374897a12.15.2025.02.03.01.09.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Feb 2025 01:09:57 -0800 (PST) From: Paul Durrant X-Google-Original-From: Paul Durrant Message-ID: <86c5647c-dbbe-4224-91d2-df2a7193d620@xen.org> Date: Mon, 3 Feb 2025 09:09:56 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Reply-To: paul@xen.org Subject: Re: [PATCH 2/5] KVM: x86/xen: Add an #ifdef'd helper to detect writes to Xen MSR To: Sean Christopherson , Paolo Bonzini , David Woodhouse Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, syzbot+cdeaeec70992eca2d920@syzkaller.appspotmail.com, Joao Martins , David Woodhouse References: <20250201011400.669483-1-seanjc@google.com> <20250201011400.669483-3-seanjc@google.com> Content-Language: en-US Organization: Xen Project In-Reply-To: <20250201011400.669483-3-seanjc@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 01/02/2025 01:13, Sean Christopherson wrote: > Add a helper to detect writes to the Xen hypercall page MSR, and provide a > stub for CONFIG_KVM_XEN=n to optimize out the check for kernels built > without Xen support. > > Signed-off-by: Sean Christopherson > --- > arch/x86/kvm/x86.c | 2 +- > arch/x86/kvm/xen.h | 10 ++++++++++ > 2 files changed, 11 insertions(+), 1 deletion(-) > Reviewed-by: Paul Durrant