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Mon, 28 Apr 2025 02:30:37 -0700 (PDT) Received: from localhost ([2a02:8308:a00c:e200:785:f3a7:1fbb:6b76]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4409d2a1dc3sm148647735e9.13.2025.04.28.02.30.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Apr 2025 02:30:37 -0700 (PDT) Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Mon, 28 Apr 2025 11:30:36 +0200 Message-Id: Subject: Re: [PATCH] target/riscv: add satp mode for kvm host cpu Cc: , , "Alistair Francis" , "Liu Zhiwei" , "Weiwei Li" , "Palmer Dabbelt" , "Daniel Henrique Barboza" , To: "Andrew Jones" , "Meng Zhuo" From: =?utf-8?q?Radim_Kr=C4=8Dm=C3=A1=C5=99?= References: <20250427132557.1589276-1-mengzhuo@iscas.ac.cn> <20250428-00fc862d2d2d628ffa4c8547@orel> In-Reply-To: <20250428-00fc862d2d2d628ffa4c8547@orel> Received-SPF: pass client-ip=2a00:1450:4864:20::330; envelope-from=rkrcmar@ventanamicro.com; helo=mail-wm1-x330.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.998, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 28 Apr 2025 09:44:55 -0400 X-BeenThere: qemu-riscv@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-riscv-bounces+qemu-riscv=archiver.kernel.org@nongnu.org Sender: qemu-riscv-bounces+qemu-riscv=archiver.kernel.org@nongnu.org 2025-04-28T09:00:55+02:00, Andrew Jones : > On Sun, Apr 27, 2025 at 09:25:57PM +0800, Meng Zhuo wrote: >> This patch adds host satp mode while kvm/host cpu satp mode is not >> set. > > Huh, the KVM side[1] was written for this purpose, but it appears we neve= r > got a QEMU side merged. > > [1] commit 2776421e6839 ("RISC-V: KVM: provide UAPI for host SATP mode") KVM satp_mode is the current SATP.mode and I don't think the other SATP.modes can generally be guessed from the host SATP mode. Can't QEMU use the host capabilities from cpuinfo or something? Do we need to return a bitmask from KVM? (e.g. WARL all modes in vsatp and return what sticks.) Thanks.