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Mon, 18 Aug 2025 13:34:01 -0700 (PDT) Received: from localhost ([140.82.166.162]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-3e66c6b0b12sm13099125ab.25.2025.08.18.13.34.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Aug 2025 13:34:00 -0700 (PDT) Date: Mon, 18 Aug 2025 15:33:59 -0500 From: Andrew Jones To: zhouquan@iscas.ac.cn Cc: anup@brainfault.org, atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org Subject: Re: [PATCH v2 2/6] RISC-V: KVM: Provide UAPI for Zicbop block size Message-ID: <20250818-8beeedd83482f6e618be2ea0@orel> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250818_133402_282146_DE849F20 X-CRM114-Status: GOOD ( 13.00 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Fri, Aug 08, 2025 at 06:18:34PM +0800, zhouquan@iscas.ac.cn wrote: > From: Quan Zhou > > We're about to allow guests to use the Zicbop extension. > KVM userspace needs to know the cache block size in order to > properly advertise it to the guest. Provide a virtual config > register for userspace to get it with the GET_ONE_REG API, but > setting it cannot be supported, so disallow SET_ONE_REG. > > Signed-off-by: Quan Zhou > --- > arch/riscv/include/uapi/asm/kvm.h | 1 + > arch/riscv/kvm/vcpu_onereg.c | 14 ++++++++++++++ > 2 files changed, 15 insertions(+) > Reviewed-by: Andrew Jones _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv