[RFC PATCH v2 4/7] target/arm: call plugin trap callbacks

[Julian Ganz]

We recently introduced API for registering callbacks for trap related
events as well as the corresponding hook functions. Due to differences
between architectures, the latter need to be called from target specific
code.

This change places hooks for ARM (and Aarch64) targets. We decided to
treat the (V)IRQ, (VI/VF)NMI, (V)FIQ and VSERR exceptions as interrupts
since they are, presumably, async in nature.

Signed-off-by: Julian Ganz <neither@nut.email>
---
 target/arm/helper.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 0a731a38e8..f636e216c8 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -31,6 +31,7 @@
 #endif
 #include "cpregs.h"
 #include "target/arm/gtimer.h"
+#include "qemu/plugin.h"
 
 #define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
 
@@ -11147,6 +11148,24 @@ static void take_aarch32_exception(CPUARMState *env, 
int new_mode,
     }
 }
 
+static void arm_do_plugin_vcpu_interrupt_cb(CPUState *cs)
+{
+    switch (cs->exception_index) {
+    case EXCP_IRQ:
+    case EXCP_VIRQ:
+    case EXCP_NMI:
+    case EXCP_VINMI:
+    case EXCP_FIQ:
+    case EXCP_VFIQ:
+    case EXCP_VFNMI:
+    case EXCP_VSERR:
+        qemu_plugin_vcpu_interrupt_cb(cs);
+        break;
+    default:
+        qemu_plugin_vcpu_exception_cb(cs);
+    }
+}
+
 static void arm_cpu_do_interrupt_aarch32_hyp(CPUState *cs)
 {
     /*
@@ -11819,6 +11838,7 @@ void arm_cpu_do_interrupt(CPUState *cs)
     if (tcg_enabled() && arm_is_psci_call(cpu, cs->exception_index)) {
         arm_handle_psci_call(cpu);
         qemu_log_mask(CPU_LOG_INT, "...handled as PSCI call\n");
+        arm_do_plugin_vcpu_interrupt_cb(cs);
         return;
     }
 
@@ -11830,6 +11850,7 @@ void arm_cpu_do_interrupt(CPUState *cs)
 #ifdef CONFIG_TCG
     if (cs->exception_index == EXCP_SEMIHOST) {
         tcg_handle_semihosting(cs);
+        qemu_plugin_vcpu_semihosting_cb(cs);
         return;
     }
 #endif
@@ -11855,6 +11876,8 @@ void arm_cpu_do_interrupt(CPUState *cs)
     if (!kvm_enabled()) {
         cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
     }
+
+    arm_do_plugin_vcpu_interrupt_cb(cs);
 }
 #endif /* !CONFIG_USER_ONLY */
 
-- 
2.45.2