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Tue, 27 Jun 2023 07:32:38 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Alistair Francis , Paolo Bonzini , Weiwei Li , Palmer Dabbelt , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Bin Meng , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Daniel Henrique Barboza , Liu Zhiwei , Thomas Huth , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , qemu-riscv@nongnu.org Subject: [PATCH 0/2] target/riscv: Only build qemu-system-riscv$$ on rv$$ host Date: Tue, 27 Jun 2023 16:32:33 +0200 Message-Id: <20230627143235.29947-1-philmd@linaro.org> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::62d; envelope-from=philmd@linaro.org; helo=mail-ej1-x62d.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, T_SCC_BODY_TEXT_LINE=-0.01 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Per Anup Patel in [*]: > Currently, we only support running rv64 guest on rv64 host > and rv32 guest on rv32 host. > > In the future, we might support running rv32 guest on rv64 > host but as of now we don't see a strong push for it. Therefore, when only using the KVM accelerator it is pointless to build qemu-system-riscv32 on a rv64 host (or qemu-system-riscv64 on a rv32 host). Restrict meson to only build the correct binary, avoiding to waste ressources building unusable code. [*] https://lore.kernel.org/qemu-devel/CAAhSdy2JeRHeeoEc1XKQhPO3aDz4YKeyQsPT4S8yKJcYTA+AiQ@mail.gmail.com/ Based-on: <20230626232007.8933-1-philmd@linaro.org> "target/riscv: Allow building without TCG (KVM-only so far)" https://lore.kernel.org/qemu-devel/20230626232007.8933-1-philmd@linaro.org/ Philippe Mathieu-Daudé (2): target/riscv: Only unify 'riscv32/64' -> 'riscv' for host cpu in meson target/riscv: Only build KVM guest with same wordsize as host meson.build | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) Reviewed-by: Richard Henderson Reviewed-by: Alistair Francis