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[83.50.68.71]) by smtp.gmail.com with ESMTPSA id fv9sm15550780pjb.7.2022.02.14.16.27.02 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Mon, 14 Feb 2022 16:27:07 -0800 (PST) To: Richard Henderson , Mark Burton , qemu-devel@nongnu.org Cc: Amir Gonnen , Eric Blake , Marcel Apfelbaum , =?utf-8?q?Daniel_P_=2E_Berra?= =?utf-8?q?ng=C3=A9?= , Thomas Huth , Stefan Hajnoczi , Markus Armbruster , "Edgar E . Iglesias" , Yanan Wang , Damien Hedde , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Mirela Grujic , Juan Quintela , Paolo Bonzini , Eduardo Habkost Subject: [NOTFORMERGE PATCH 0/1] target: Toward heterogeneous machine Date: Tue, 15 Feb 2022 01:26:57 +0100 Message-Id: <20220215002658.60678-1-f4bug@amsat.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::430 (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::430; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-pf1-x430.google.com X-Spam_score_int: 0 X-Spam_score: -0.1 X-Spam_bar: / X-Spam_report: (-0.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, PDS_HP_HELO_NORDNS=0.635, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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" Reply-to: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Original-From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= via From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Hi, following last week KVM call [1], I'm posting my playground machine to slowly work toward heterogeneous QEMU. This is orthogonal to Paolo / Markus / Daniel effort to have a qemu-system-qmp CLI entrypoint [2]. After refactoring a bit the headers to remove target-specific dependencies, we can remove the targets (and accelerators) from the picture, to have a target-agnostic QEMU. This binary helps to find a lot of code abuses where we only expect one target being built, and is useful to clean that. So far my naive roadmap draft is: - Ignoring target-specific hardware devices, target-agnostic code should only use the CPUClass and CPUState to interface with the target-specific code. - CPU objects shouldn't access an unique global accelerator, but should be initialized with a specific accelerator. - Each target registers as a QEMU module. Should we expose a target API beside the CPU? - Compile TCG-target-specific objects in each target dir? - Refactor buildsys to register multiple targets. - TBC. [1] https://lore.kernel.org/qemu-devel/87fsot761s.fsf@secure.mitica/ [2] https://lore.kernel.org/qemu-devel/20220208144458.1079634-1-pbonzini@redhat.com/ Based-on: <20220214183144.27402-1-f4bug@amsat.org> "target: Use ArchCPU & CPUArchState as abstract interface to target CPU" https://lore.kernel.org/qemu-devel/20220214183144.27402-1-f4bug@amsat.org/ Philippe Mathieu-Daudé (1): target: Add system emulation aiming to target any architecture configs/devices/any-softmmu/default.mak | 1 + configs/targets/any-softmmu.mak | 3 +++ hw/any/meson.build | 5 +++++ hw/meson.build | 1 + include/sysemu/arch_init.h | 1 + meson.build | 6 +++-- qapi/machine.json | 2 +- target/Kconfig | 1 + target/any/Kconfig | 4 ++++ target/any/cpu-param.h | 30 +++++++++++++++++++++++++ target/any/cpu.h | 26 +++++++++++++++++++++ target/any/meson.build | 8 +++++++ target/meson.build | 1 + 13 files changed, 86 insertions(+), 3 deletions(-) create mode 100644 configs/devices/any-softmmu/default.mak create mode 100644 configs/targets/any-softmmu.mak create mode 100644 hw/any/meson.build create mode 100644 target/any/Kconfig create mode 100644 target/any/cpu-param.h create mode 100644 target/any/cpu.h create mode 100644 target/any/meson.build