From: Philippe Mathieu-Daudé <philmd@linaro.org>
Date: Fri, 3 Oct 2025 14:14:51 +0000 (+0200)
Subject: accel/hvf: Skip WFI if CPU has work to do
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a14afa985e347c6978ab83c9e7a90d8002462042;p=thirdparty%2Fqemu.git

accel/hvf: Skip WFI if CPU has work to do

Avoid sleeping vCPU thread for any pending work, not just IRQs.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Message-ID: <20260112103034.65310-13-philmd@linaro.org>
---

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index af28b8e882..d74703a3d5 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;
     }