target/arm/hvf: Directly re-lock BQL after hv_vcpu_run()

Keep bql_unlock() / bql_lock() close.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-id: 20250623121845.7214-6-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/hvf/hvf.c

@@ -1915,7 +1915,9 @@ int hvf_vcpu_exec(CPUState *cpu)
     flush_cpu_state(cpu);
 
     bql_unlock();
-    assert_hvf_ok(hv_vcpu_run(cpu->accel->fd));
+    r = hv_vcpu_run(cpu->accel->fd);
+    bql_lock();
+    assert_hvf_ok(r);
 
     /* handle VMEXIT */
     uint64_t exit_reason = hvf_exit->reason;
@@ -1923,7 +1925,6 @@ int hvf_vcpu_exec(CPUState *cpu)
     uint32_t ec = syn_get_ec(syndrome);
 
     ret = 0;
-    bql_lock();
     switch (exit_reason) {
     case HV_EXIT_REASON_EXCEPTION:
         /* This is the main one, handle below. */