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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47787e2b835sm161692475e9.2.2025.11.14.12.05.54 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 14 Nov 2025 12:05:55 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Alexander Graf , qemu-arm@nongnu.org, Phil Dennis-Jordan , Paolo Bonzini , Richard Henderson , Peter Collingbourne , Cameron Esfahani , Mohamed Mediouni , Peter Maydell , Akihiko Odaki , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Roman Bolshakov , Mads Ynddal , =?UTF-8?q?Alex=20Benn=C3=A9e?= Subject: [PATCH v5 12/19] accel/hvf: Skip WFI if CPU has work to do Date: Fri, 14 Nov 2025 21:04:14 +0100 Message-ID: <20251114200422.4280-13-philmd@linaro.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251114200422.4280-1-philmd@linaro.org> References: <20251114200422.4280-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::336; envelope-from=philmd@linaro.org; helo=mail-wm1-x336.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=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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Avoid sleeping vCPU thread for any pending work, not just IRQs. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Alex Bennée Reviewed-by: Richard Henderson --- target/arm/hvf/hvf.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index 0f584b8137a..5e46e8bf4dd 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -1737,8 +1737,11 @@ static void hvf_wfi(CPUState *cpu) uint64_t nanos; uint32_t cntfrq; - if (cpu_test_interrupt(cpu, CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIQ)) { - /* Interrupt pending, no need to wait */ + if (cpu_has_work(cpu)) { + /* + * Don't bother to go into our "low power state" if + * we would just wake up immediately. + */ return; } -- 2.51.0