[Qemu-devel] [PATCH -v2 1/2] Log reset events

[Jan Kiszka <jan.kiszka@siemens.com>]

[ Updated to use new log API. ]

Original idea&code by Kevin Wolf, now split-up in two patches and added
more archs.

This patch introduces a flag to log CPU resets. Useful for tracing
unexpected resets (such as those triggered by x86 triple faults).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Kevin Wolf <kwolf@suse.de>
---

 cpu-all.h               |    1 +
 exec.c                  |    2 ++
 target-arm/helper.c     |    6 ++++++
 target-cris/translate.c |    5 +++++
 target-i386/helper.c    |    5 +++++
 target-m68k/helper.c    |    5 +++++
 target-mips/translate.c |    5 +++++
 target-ppc/helper.c     |    8 ++++++--
 target-sh4/translate.c  |    5 +++++
 target-sparc/helper.c   |    5 +++++
 10 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/cpu-all.h b/cpu-all.h
index ee0a6e3..59c686a 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -816,6 +816,7 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr);
 #define CPU_LOG_PCALL      (1 << 6)
 #define CPU_LOG_IOPORT     (1 << 7)
 #define CPU_LOG_TB_CPU     (1 << 8)
+#define CPU_LOG_RESET      (1 << 9)
 
 /* define log items */
 typedef struct CPULogItem {
diff --git a/exec.c b/exec.c
index faa6333..fa2ebbd 100644
--- a/exec.c
+++ b/exec.c
@@ -1569,6 +1569,8 @@ const CPULogItem cpu_log_items[] = {
 #ifdef TARGET_I386
     { CPU_LOG_PCALL, "pcall",
       "show protected mode far calls/returns/exceptions" },
+    { CPU_LOG_RESET, "cpu_reset",
+      "show CPU state before CPU resets" },
 #endif
 #ifdef DEBUG_IOPORT
     { CPU_LOG_IOPORT, "ioport",
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 81663c8..a243d9b 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -159,6 +159,12 @@ static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
 void cpu_reset(CPUARMState *env)
 {
     uint32_t id;
+
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+        cpu_dump_state(env, logfile, fprintf, 0);
+    }
+
     id = env->cp15.c0_cpuid;
     memset(env, 0, offsetof(CPUARMState, breakpoints));
     if (id)
diff --git a/target-cris/translate.c b/target-cris/translate.c
index 2ff6fe2..7e07916 100644
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -3458,6 +3458,11 @@ CPUCRISState *cpu_cris_init (const char *cpu_model)
 
 void cpu_reset (CPUCRISState *env)
 {
+	if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+		fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+		cpu_dump_state(env, logfile, fprintf, 0);
+	}
+
 	memset(env, 0, offsetof(CPUCRISState, breakpoints));
 	tlb_flush(env, 1);
 
diff --git a/target-i386/helper.c b/target-i386/helper.c
index a28ab93..8cdc01f 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -418,6 +418,11 @@ void cpu_reset(CPUX86State *env)
 {
     int i;
 
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+        cpu_dump_state(env, logfile, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP);
+    }
+
     memset(env, 0, offsetof(CPUX86State, breakpoints));
 
     tlb_flush(env, 1);
diff --git a/target-m68k/helper.c b/target-m68k/helper.c
index ce56693..d70e355 100644
--- a/target-m68k/helper.c
+++ b/target-m68k/helper.c
@@ -143,6 +143,11 @@ static int cpu_m68k_set_model(CPUM68KState *env, const char *name)
 
 void cpu_reset(CPUM68KState *env)
 {
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+        cpu_dump_state(env, logfile, fprintf, 0);
+    }
+
     memset(env, 0, offsetof(CPUM68KState, breakpoints));
 #if !defined (CONFIG_USER_ONLY)
     env->sr = 0x2700;
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 692ea6d..c9b7f5c 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -8489,6 +8489,11 @@ CPUMIPSState *cpu_mips_init (const char *cpu_model)
 
 void cpu_reset (CPUMIPSState *env)
 {
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+        cpu_dump_state(env, logfile, fprintf, 0);
+    }
+
     memset(env, 0, offsetof(CPUMIPSState, breakpoints));
 
     tlb_flush(env, 1);
diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index 2bf7650..613df0b 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -2709,10 +2709,14 @@ void cpu_dump_rfi (target_ulong RA, target_ulong msr)
 
 void cpu_ppc_reset (void *opaque)
 {
-    CPUPPCState *env;
+    CPUPPCState *env = opaque;
     target_ulong msr;
 
-    env = opaque;
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+        cpu_dump_state(env, logfile, fprintf, 0);
+    }
+
     msr = (target_ulong)0;
     if (0) {
         /* XXX: find a suitable condition to enable the hypervisor mode */
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index 9137e38..690344a 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -184,6 +184,11 @@ void cpu_dump_state(CPUState * env, FILE * f,
 
 static void cpu_sh4_reset(CPUSH4State * env)
 {
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+        cpu_dump_state(env, logfile, fprintf, 0);
+    }
+
 #if defined(CONFIG_USER_ONLY)
     env->sr = 0;
 #else
diff --git a/target-sparc/helper.c b/target-sparc/helper.c
index d34b837..8598249 100644
--- a/target-sparc/helper.c
+++ b/target-sparc/helper.c
@@ -639,6 +639,11 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
 
 void cpu_reset(CPUSPARCState *env)
 {
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        fprintf(logfile, "CPU Reset (CPU %d)\n", env->cpu_index);
+        cpu_dump_state(env, logfile, fprintf, 0);
+    }
+
     tlb_flush(env, 1);
     env->cwp = 0;
     env->wim = 1;