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[95.127.63.101]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a6d117c0fcsm2649111f8f.62.2025.06.20.10.31.01 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 20 Jun 2025 10:31:04 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Alexander Graf , =?utf-8?q?Alex_Benn=C3=A9e?= , Richard Henderson , Paolo Bonzini , Peter Maydell , Julian Armistead , Cameron Esfahani , Mark Burton , Thomas Huth , "Edgar E. Iglesias" , Pierrick Bouvier , =?utf-8?q?Philippe_Mathieu-?= =?utf-8?q?Daud=C3=A9?= Subject: [RFC PATCH RESEND 21/42] accel/split: Set use_hw in cpu_thread_routine() and switch over Date: Fri, 20 Jun 2025 19:27:29 +0200 Message-ID: <20250620172751.94231-22-philmd@linaro.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250620172751.94231-1-philmd@linaro.org> References: <20250620172751.94231-1-philmd@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::433; envelope-from=philmd@linaro.org; helo=mail-wr1-x433.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Introduce the EXCP_HWACCEL definition to switch to hardware accelerator. Signed-off-by: Philippe Mathieu-Daudé --- accel/split/split-accel.h | 1 + include/exec/cpu-common.h | 1 + accel/split/split-accel-ops.c | 11 +++++++++++ 3 files changed, 13 insertions(+) diff --git a/accel/split/split-accel.h b/accel/split/split-accel.h index 87a08454ce6..8a2888507f3 100644 --- a/accel/split/split-accel.h +++ b/accel/split/split-accel.h @@ -42,6 +42,7 @@ struct AccelCPUState { char pad[128]; AccelState *accel; + bool use_hw; }; diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index a68485547d5..6216be5f5e3 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -20,6 +20,7 @@ #define EXCP_HALTED 0x10003 /* cpu is halted (waiting for external event) */ #define EXCP_YIELD 0x10004 /* cpu wants to yield timeslice to another */ #define EXCP_ATOMIC 0x10005 /* stop-the-world and emulate atomic */ +#define EXCP_HWACCEL 0x10006 /* use hardware accelerator */ void cpu_exec_init_all(void); void cpu_exec_step_atomic(CPUState *cpu); diff --git a/accel/split/split-accel-ops.c b/accel/split/split-accel-ops.c index 3278e01f18a..1766834d537 100644 --- a/accel/split/split-accel-ops.c +++ b/accel/split/split-accel-ops.c @@ -10,9 +10,12 @@ #include "qemu/main-loop.h" #include "qemu/guest-random.h" #include "exec/cpu-common.h" +#include "exec/cpu-interrupt.h" #include "hw/core/cpu.h" #include "system/accel-ops.h" #include "system/cpus.h" +#include "system/hw_accel.h" +#include "system/tcg.h" #include "split-accel.h" #include "accel/accel-internal.h" @@ -66,10 +69,14 @@ static void *split_cpu_thread_routine(void *arg) } switch (r) { case 0: + if (acs->use_hw) { + acs->use_hw = cpu_acceleratable(cpu); + } break; case EXCP_INTERRUPT: break; case EXCP_YIELD: + assert(!acs->use_hw); break; case EXCP_DEBUG: cpu_handle_guest_debug(cpu); @@ -86,6 +93,10 @@ static void *split_cpu_thread_routine(void *arg) cpu_exec_step_atomic(cpu); bql_lock(); break; + case EXCP_HWACCEL: + assert(!acs->use_hw); + acs->use_hw = true; + break; default: /* Ignore everything else? */ break;