[PATCH v6 28/39] accel: Expose and register generic_handle_interrupt()

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

In order to dispatch over AccelOpsClass::handle_interrupt(),
we need it always defined, not calling a hidden handler under
the hood. Make AccelOpsClass::handle_interrupt() mandatory.
Expose generic_handle_interrupt() prototype and register it
for each accelerator.

Suggested-by: Richard Henderson <richard.henderson@xxxxxxxxxx>
Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@xxxxxxxxxx>
Reviewed-by: Zhao Liu <zhao1.liu@xxxxxxxxx>
Reviewed-by: Richard Henderson <richard.henderson@xxxxxxxxxx>
---
 include/system/accel-ops.h        |  3 +++
 accel/hvf/hvf-accel-ops.c         |  1 +
 accel/kvm/kvm-accel-ops.c         |  1 +
 accel/qtest/qtest.c               |  1 +
 accel/xen/xen-all.c               |  1 +
 system/cpus.c                     | 10 ++++------
 target/i386/nvmm/nvmm-accel-ops.c |  1 +
 target/i386/whpx/whpx-accel-ops.c |  1 +
 8 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/include/system/accel-ops.h b/include/system/accel-ops.h
index d84eaa376c2..95a0f402cde 100644
--- a/include/system/accel-ops.h
+++ b/include/system/accel-ops.h
@@ -61,6 +61,7 @@ struct AccelOpsClass {
     void (*synchronize_pre_loadvm)(CPUState *cpu);
     void (*synchronize_pre_resume)(bool step_pending);
 
+    /* handle_interrupt is mandatory. */
     void (*handle_interrupt)(CPUState *cpu, int old_mask, int new_mask);
 
     /**
@@ -84,4 +85,6 @@ struct AccelOpsClass {
     void (*remove_all_breakpoints)(CPUState *cpu);
 };
 
+void generic_handle_interrupt(CPUState *cpu, int old_mask, int new_mask);
+
 #endif /* ACCEL_OPS_H */
diff --git a/accel/hvf/hvf-accel-ops.c b/accel/hvf/hvf-accel-ops.c
index 2944e350ca9..a0248942f3a 100644
--- a/accel/hvf/hvf-accel-ops.c
+++ b/accel/hvf/hvf-accel-ops.c
@@ -353,6 +353,7 @@ static void hvf_accel_ops_class_init(ObjectClass *oc, const 
void *data)
 
     ops->create_vcpu_thread = hvf_start_vcpu_thread;
     ops->kick_vcpu_thread = hvf_kick_vcpu_thread;
+    ops->handle_interrupt = generic_handle_interrupt;
 
     ops->synchronize_post_reset = hvf_cpu_synchronize_post_reset;
     ops->synchronize_post_init = hvf_cpu_synchronize_post_init;
diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c
index 99f61044da5..2a744092749 100644
--- a/accel/kvm/kvm-accel-ops.c
+++ b/accel/kvm/kvm-accel-ops.c
@@ -95,6 +95,7 @@ static void kvm_accel_ops_class_init(ObjectClass *oc, const 
void *data)
     ops->synchronize_post_init = kvm_cpu_synchronize_post_init;
     ops->synchronize_state = kvm_cpu_synchronize_state;
     ops->synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm;
+    ops->handle_interrupt = generic_handle_interrupt;
 
 #ifdef TARGET_KVM_HAVE_GUEST_DEBUG
     ops->update_guest_debug = kvm_update_guest_debug_ops;
diff --git a/accel/qtest/qtest.c b/accel/qtest/qtest.c
index 612cede160b..5474ce73135 100644
--- a/accel/qtest/qtest.c
+++ b/accel/qtest/qtest.c
@@ -67,6 +67,7 @@ static void qtest_accel_ops_class_init(ObjectClass *oc, const 
void *data)
     ops->create_vcpu_thread = dummy_start_vcpu_thread;
     ops->get_virtual_clock = qtest_get_virtual_clock;
     ops->set_virtual_clock = qtest_set_virtual_clock;
+    ops->handle_interrupt = generic_handle_interrupt;
 };
 
 static const TypeInfo qtest_accel_ops_type = {
diff --git a/accel/xen/xen-all.c b/accel/xen/xen-all.c
index c150dd43cab..c12c22de785 100644
--- a/accel/xen/xen-all.c
+++ b/accel/xen/xen-all.c
@@ -153,6 +153,7 @@ static void xen_accel_ops_class_init(ObjectClass *oc, const 
void *data)
     AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
 
     ops->create_vcpu_thread = dummy_start_vcpu_thread;
+    ops->handle_interrupt = generic_handle_interrupt;
 }
 
 static const TypeInfo xen_accel_ops_type = {
diff --git a/system/cpus.c b/system/cpus.c
index 13535a74e6f..f90b8be9eee 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -246,7 +246,7 @@ int64_t cpus_get_elapsed_ticks(void)
     return cpu_get_ticks();
 }
 
-static void generic_handle_interrupt(CPUState *cpu, int old_mask, int new_mask)
+void generic_handle_interrupt(CPUState *cpu, int old_mask, int new_mask)
 {
     if (!qemu_cpu_is_self(cpu)) {
         qemu_cpu_kick(cpu);
@@ -261,11 +261,7 @@ void cpu_interrupt(CPUState *cpu, int mask)
 
     cpu->interrupt_request |= mask;
 
-    if (cpus_accel->handle_interrupt) {
-        cpus_accel->handle_interrupt(cpu, old_mask, cpu->interrupt_request);
-    } else {
-        generic_handle_interrupt(cpu, old_mask, cpu->interrupt_request);
-    }
+    cpus_accel->handle_interrupt(cpu, old_mask, cpu->interrupt_request);
 }
 
 /*
@@ -674,6 +670,8 @@ void cpus_register_accel(const AccelOpsClass *ops)
 {
     assert(ops != NULL);
     assert(ops->create_vcpu_thread != NULL); /* mandatory */
+    assert(ops->handle_interrupt);
+
     cpus_accel = ops;
 }
 
diff --git a/target/i386/nvmm/nvmm-accel-ops.c 
b/target/i386/nvmm/nvmm-accel-ops.c
index 21443078b72..a5517b0abf3 100644
--- a/target/i386/nvmm/nvmm-accel-ops.c
+++ b/target/i386/nvmm/nvmm-accel-ops.c
@@ -87,6 +87,7 @@ static void nvmm_accel_ops_class_init(ObjectClass *oc, const 
void *data)
 
     ops->create_vcpu_thread = nvmm_start_vcpu_thread;
     ops->kick_vcpu_thread = nvmm_kick_vcpu_thread;
+    ops->handle_interrupt = generic_handle_interrupt;
 
     ops->synchronize_post_reset = nvmm_cpu_synchronize_post_reset;
     ops->synchronize_post_init = nvmm_cpu_synchronize_post_init;
diff --git a/target/i386/whpx/whpx-accel-ops.c 
b/target/i386/whpx/whpx-accel-ops.c
index b8bebe403c9..31cf15f0045 100644
--- a/target/i386/whpx/whpx-accel-ops.c
+++ b/target/i386/whpx/whpx-accel-ops.c
@@ -90,6 +90,7 @@ static void whpx_accel_ops_class_init(ObjectClass *oc, const 
void *data)
     ops->create_vcpu_thread = whpx_start_vcpu_thread;
     ops->kick_vcpu_thread = whpx_kick_vcpu_thread;
     ops->cpu_thread_is_idle = whpx_vcpu_thread_is_idle;
+    ops->handle_interrupt = generic_handle_interrupt;
 
     ops->synchronize_post_reset = whpx_cpu_synchronize_post_reset;
     ops->synchronize_post_init = whpx_cpu_synchronize_post_init;
-- 
2.49.0