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[2.142.241.104]) by smtp.gmail.com with ESMTPSA id u23sm151668wru.21.2021.11.10.07.02.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Nov 2021 07:02:39 -0800 (PST) Subject: Re: [PATCH v2 14/14] target/riscv: Enable uxl field write To: LIU Zhiwei , qemu-devel@nongnu.org, qemu-riscv@nongnu.org References: <20211110070452.48539-1-zhiwei_liu@c-sky.com> <20211110070452.48539-15-zhiwei_liu@c-sky.com> <59e04faf-3832-bec9-52f3-d5a91d20b893@linaro.org> From: Richard Henderson Message-ID: <9b290086-010b-5cb6-23e0-b7188445a546@linaro.org> Date: Wed, 10 Nov 2021 16:02:35 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::336 (failed) Received-SPF: pass client-ip=2a00:1450:4864:20::336; envelope-from=richard.henderson@linaro.org; helo=mail-wm1-x336.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-1.678, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: palmer@dabbelt.com, bin.meng@windriver.com, Alistair.Francis@wdc.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 11/10/21 3:38 PM, LIU Zhiwei wrote: >> Why do you not allow writes to SXL? > > That means we still don't support the change of SXLEN. > I didn't check the S-mode CSRs behavior when XLEN changes in this patch set. > > For example, the behavior of satp when trap into M-mode from S-mode if SXLEN=32 and MXLEN=64. Ah, good answer. r~