[PATCH 6/8] hvf: Use OS provided vcpu kick function

From: Alexander Graf <agraf@csgraf.de>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	Eduardo Habkost <ehabkost@redhat.com>,
	Richard Henderson <richard.henderson@linaro.org>,
	Cameron Esfahani <dirty@apple.com>,
	Roman Bolshakov <r.bolshakov@yadro.com>,
	qemu-arm@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>
Subject: [PATCH 6/8] hvf: Use OS provided vcpu kick function
Date: Thu, 26 Nov 2020 22:50:15 +0100	[thread overview]
Message-ID: <20201126215017.41156-7-agraf@csgraf.de> (raw)
In-Reply-To: <20201126215017.41156-1-agraf@csgraf.de>

When kicking another vCPU, we get an OS function that explicitly does that for us
on Apple Silicon. That works better than the current signaling logic, let's make
use of it there.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
---
 accel/hvf/hvf-cpus.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/accel/hvf/hvf-cpus.c b/accel/hvf/hvf-cpus.c
index b9f674478d..74a272d2e8 100644
--- a/accel/hvf/hvf-cpus.c
+++ b/accel/hvf/hvf-cpus.c
@@ -418,8 +418,20 @@ static void hvf_start_vcpu_thread(CPUState *cpu)
                        cpu, QEMU_THREAD_JOINABLE);
 }
 
+#ifdef __aarch64__
+static void hvf_kick_vcpu_thread(CPUState *cpu)
+{
+    if (!qemu_cpu_is_self(cpu)) {
+        hv_vcpus_exit(&cpu->hvf_fd, 1);
+    }
+}
+#endif
+
 static const CpusAccel hvf_cpus = {
     .create_vcpu_thread = hvf_start_vcpu_thread,
+#ifdef __aarch64__
+    .kick_vcpu_thread = hvf_kick_vcpu_thread,
+#endif
 
     .synchronize_post_reset = hvf_cpu_synchronize_post_reset,
     .synchronize_post_init = hvf_cpu_synchronize_post_init,
-- 
2.24.3 (Apple Git-128)


