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[174.21.74.48]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-22780f3bb2fsm54507495ad.15.2025.03.23.11.08.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 23 Mar 2025 11:08:50 -0700 (PDT) Message-ID: <2650b68f-e705-4994-9791-0bf8b2e01d74@linaro.org> Date: Sun, 23 Mar 2025 11:08:49 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH-for-10.1 1/4] target/riscv: Restrict RV128 MTTCG check on system emulation To: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org Cc: Anton Johansson , Pierrick Bouvier , Paolo Bonzini References: <20250321155925.96626-1-philmd@linaro.org> <20250321155925.96626-2-philmd@linaro.org> Content-Language: en-US From: Richard Henderson In-Reply-To: <20250321155925.96626-2-philmd@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::636; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x636.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=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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 3/21/25 08:59, Philippe Mathieu-Daudé wrote: > Multi-threaded TCG only concerns system emulation. That's not really true. User emulation simply has no option to run in a single-threaded context. I really don't think we should allow RV128 in user-mode at all. Certainly not until there's a kernel abi for it. r~