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Tue, 27 Jun 2023 07:32:52 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Alistair Francis , Paolo Bonzini , Weiwei Li , Palmer Dabbelt , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Bin Meng , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Daniel Henrique Barboza , Liu Zhiwei , Thomas Huth , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-riscv@nongnu.org Subject: [PATCH 2/2] target/riscv: Only build KVM guest with same wordsize as host Date: Tue, 27 Jun 2023 16:32:35 +0200 Message-Id: <20230627143235.29947-3-philmd@linaro.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230627143235.29947-1-philmd@linaro.org> References: <20230627143235.29947-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::635; envelope-from=philmd@linaro.org; helo=mail-ej1-x635.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1687876408836100001 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/CAAhSdy2JeRHeeoEc1XKQhPO3aDz4YKeyQsP= T4S8yKJcYTA+AiQ@mail.gmail.com/ Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- meson.build | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/meson.build b/meson.build index 649de244c6..a3ab614235 100644 --- a/meson.build +++ b/meson.build @@ -110,8 +110,10 @@ elif cpu in ['ppc', 'ppc64'] kvm_targets =3D ['ppc-softmmu', 'ppc64-softmmu'] elif cpu in ['mips', 'mips64'] kvm_targets =3D ['mips-softmmu', 'mipsel-softmmu', 'mips64-softmmu', 'mi= ps64el-softmmu'] -elif cpu in ['riscv32', 'riscv64'] - kvm_targets =3D ['riscv32-softmmu', 'riscv64-softmmu'] +elif cpu in ['riscv32'] + kvm_targets =3D ['riscv32-softmmu'] +elif cpu in ['riscv64'] + kvm_targets =3D ['riscv64-softmmu'] else kvm_targets =3D [] endif --=20 2.38.1