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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a073ca556bsm3585046f8f.37.2025.04.25.15.35.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Apr 2025 15:35:52 -0700 (PDT) Message-ID: <4cfc3a69-bae7-41ae-9f82-13eee8a8164e@linaro.org> Date: Sat, 26 Apr 2025 00:35:52 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH alternate 0/2] target/riscv: Fix write_misa vs aligned next_pc To: Richard Henderson , qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, dbarboza@ventanamicro.com References: <20250425165055.807801-1-richard.henderson@linaro.org> Content-Language: en-US From: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= In-Reply-To: <20250425165055.807801-1-richard.henderson@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2a00:1450:4864:20::32b; envelope-from=philmd@linaro.org; helo=mail-wm1-x32b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 25/4/25 18:50, Richard Henderson wrote: > This is an alternate, but less exact approach. It assumes that there > will never be a 16 or 48-bit csr write instruction. This feels dirtier, > but it's a fair assumption involves much less faff. I prefer the other safer version which properly propagate $ra, which could be useful for callees.