[PULL 17/32] target/arm: Log CPU index in 'Taking exception' log

[Peter Maydell]

In an SMP system it can be unclear which CPU is taking an exception;
add the CPU index (which is the same value used in the TCG 'Trace
%d:' logging) to the "Taking exception" log line to clarify it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220122182444.724087-2-peter.maydell@linaro.org
---
 target/arm/internals.h | 2 +-
 target/arm/helper.c    | 9 ++++++---
 target/arm/m_helper.c  | 2 +-
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/target/arm/internals.h b/target/arm/internals.h
index 89f7610ebc5..3f05748ea47 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1130,7 +1130,7 @@ bool get_phys_addr(CPUARMState *env, target_ulong address,
                    ARMMMUFaultInfo *fi, ARMCacheAttrs *cacheattrs)
     __attribute__((nonnull));
 
-void arm_log_exception(int idx);
+void arm_log_exception(CPUState *cs);
 
 #endif /* !CONFIG_USER_ONLY */
 
diff --git a/target/arm/helper.c b/target/arm/helper.c
index cfca0f5ba6d..4df12394021 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -9317,8 +9317,10 @@ uint32_t arm_phys_excp_target_el(CPUState *cs, uint32_t 
excp_idx,
     return target_el;
 }
 
-void arm_log_exception(int idx)
+void arm_log_exception(CPUState *cs)
 {
+    int idx = cs->exception_index;
+
     if (qemu_loglevel_mask(CPU_LOG_INT)) {
         const char *exc = NULL;
         static const char * const excnames[] = {
@@ -9352,7 +9354,8 @@ void arm_log_exception(int idx)
         if (!exc) {
             exc = "unknown";
         }
-        qemu_log_mask(CPU_LOG_INT, "Taking exception %d [%s]\n", idx, exc);
+        qemu_log_mask(CPU_LOG_INT, "Taking exception %d [%s] on CPU %d\n",
+                      idx, exc, cs->cpu_index);
     }
 }
 
@@ -10185,7 +10188,7 @@ void arm_cpu_do_interrupt(CPUState *cs)
 
     assert(!arm_feature(env, ARM_FEATURE_M));
 
-    arm_log_exception(cs->exception_index);
+    arm_log_exception(cs);
     qemu_log_mask(CPU_LOG_INT, "...from EL%d to EL%d\n", arm_current_el(env),
                   new_el);
     if (qemu_loglevel_mask(CPU_LOG_INT)
diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
index 2c9922dc292..b11e927df1d 100644
--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -2206,7 +2206,7 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
     uint32_t lr;
     bool ignore_stackfaults;
 
-    arm_log_exception(cs->exception_index);
+    arm_log_exception(cs);
 
     /*
      * For exceptions we just mark as pending on the NVIC, and let that
-- 
2.25.1