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[31.30.174.132]) by smtp.gmail.com with ESMTPSA id v8sm1868003edc.30.2021.04.27.02.40.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Apr 2021 02:40:34 -0700 (PDT) Date: Tue, 27 Apr 2021 11:40:32 +0200 From: Andrew Jones To: Haibo Xu Subject: Re: [PATCH RESEND v2 0/6] target/arm: Add nested virtualization support Message-ID: <20210427094032.awefmueute7gek2d@gator.home> References: MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=drjones@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=drjones@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.219, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, richard.henderson@linaro.org, qemu-devel@nongnu.org, abologna@redhat.com, qemu-arm@nongnu.org, philmd@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, Apr 01, 2021 at 05:55:32AM -0700, Haibo Xu wrote: > v2: > - Move the NV to a CPU feature flag(Andrea&Andrew) > - Add CPU feature 'el2' test(Andrew) > > Many thanks to Andrea and Andrew for their comments! > > This series add support for ARMv8.3/8.4 nested virtualization support > in KVM mode. It's based on Marc Zyngier's kernel KVM patches[1], and > has been tested on a FVP model to run a L2 guest with Qemu. Now the > feature can be enabled by "-M virt,accel=kvm -cpu host,el2=on" when > starting a VM. > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-5.12-WIP > > Haibo Xu (6): > Update linux header with new arm64 NV macro > target/arm/kvm: Add helper to detect el2 when using KVM > target/arm/kvm: Add an option to turn on/off el2 support > hw/intc/arm_gicv3: Enable support for setting vGIC maintenance IRQ > target/arm/cpu: Enable 'el2' to work with host/max cpu > target/arm: Add vCPU feature 'el2' test. Hi Haibo, Thank you for this new feature. Please also update docs/system/arm/cpu-features.rst in the next version of this patch series. Thanks, drew