[PATCH v2 6/6] target/loongarch: Dump all generic CSR registers

[Bibo Mao]

CSR registers is import system control registers, it had better
dump all CSR registers when VM is running in system mode.

Here is dump output example of CSR registers:
 CSR000: CRMD b4                 PRMD 4                  EUEN 0                 
 MISC 0
 CSR004: ECFG 71c1c              ESTAT 0                 ERA 9000000002901300   
 BADV 12022c0e0
 CSR008: BADI 2b0000
 CSR012: EENTRY 9000000100250000
 CSR016: TLBIDX ffffffff8e000228 TLBEHI 120228000        TLBELO0 
400000016f0a001f TLBELO1 400000016f0b401f
 CSR024: ASID a0003              PGDL 900000010432c000   PGDH 9000000004350000  
 PGD 0
 CSR028: PWCL 5e56e              PWCH 2e4                STLBPS e               
 RVACFG 0
 CSR032: CPUID 3                 PRCFG1 72f8             PRCFG2 3ffff000        
 PRCFG3 8073f2
 CSR048: SAVE0 0                 SAVE1 171c              SAVE2 12010c3b8        
 SAVE3 8e30000
 CSR052: SAVE4 0                 SAVE5 0                 SAVE6 0                
 SAVE7 0
 CSR064: TID 1                   TCFG 60670              TVAL 60670             
 CNTC fffffffffe6002cb
 CSR068: TICLR 0
 CSR096: LLBCTL 0
 CSR136: TLBRENTRY 10025a000     TLBRBADV 139ef6708      TLBRERA 120113d98      
 TLBRSAVE d901
 CSR140: TLBRELO0 0              TLBRELO1 0              TLBREHI 139ef600e      
 TLBRPRMD 7
 CSR384: DMW0 8000000000000001   DMW1 9000000000000011   DMW2 0                 
 DMW3 0

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 target/loongarch/cpu.c | 62 +++++++++++++++++++++++++++++++-----------
 target/loongarch/csr.c |  2 ++
 target/loongarch/csr.h |  1 +
 3 files changed, 49 insertions(+), 16 deletions(-)

diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index a744010332..502258d54e 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -793,6 +793,50 @@ static ObjectClass *loongarch_cpu_class_by_name(const char 
*cpu_model)
     return oc;
 }
 
+static void loongarch_cpu_dump_csr(CPUState *cs, FILE *f)
+{
+#ifndef CONFIG_USER_ONLY
+    CPULoongArchState *env = cpu_env(cs);
+    CSRInfo *csr_info;
+    int64_t *addr;
+    int i, j, len, col = 0;
+
+    qemu_fprintf(f, "\n");
+
+    /* Dump all generic CSR register */
+    for (i = 0; i < LOONGARCH_CSR_DBG; i++) {
+        csr_info = get_csr(i);
+        if (!csr_info || (csr_info->flags & CSRFL_UNUSED)) {
+            if (i == (col + 3)) {
+                qemu_fprintf(f, "\n");
+            }
+
+            continue;
+        }
+
+        if ((i >  (col + 3)) || (i == col)) {
+            col = i & ~3;
+            qemu_fprintf(f, " CSR%03d:", col);
+        }
+
+        addr = (void *)env + csr_info->offset;
+        qemu_fprintf(f, " %s %" PRIx64, csr_info->name, *addr);
+        len = find_last_bit((void *)addr, BITS_PER_LONG) & (BITS_PER_LONG - 1);
+        len = strlen(csr_info->name) + len / 4 + 1;
+        if (len < 22) {
+            for (j = 0; j < (22 - len); j++) {
+                qemu_fprintf(f, " ");
+            }
+        }
+
+        if (i == (col + 3)) {
+            qemu_fprintf(f, "\n");
+        }
+    }
+    qemu_fprintf(f, "\n");
+#endif
+}
+
 static void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags)
 {
     CPULoongArchState *env = cpu_env(cs);
@@ -812,22 +856,8 @@ static void loongarch_cpu_dump_state(CPUState *cs, FILE 
*f, int flags)
         }
     }
 
-    qemu_fprintf(f, "CRMD=%016" PRIx64 "\n", env->CSR_CRMD);
-    qemu_fprintf(f, "PRMD=%016" PRIx64 "\n", env->CSR_PRMD);
-    qemu_fprintf(f, "EUEN=%016" PRIx64 "\n", env->CSR_EUEN);
-    qemu_fprintf(f, "ESTAT=%016" PRIx64 "\n", env->CSR_ESTAT);
-    qemu_fprintf(f, "ERA=%016" PRIx64 "\n", env->CSR_ERA);
-    qemu_fprintf(f, "BADV=%016" PRIx64 "\n", env->CSR_BADV);
-    qemu_fprintf(f, "BADI=%016" PRIx64 "\n", env->CSR_BADI);
-    qemu_fprintf(f, "EENTRY=%016" PRIx64 "\n", env->CSR_EENTRY);
-    qemu_fprintf(f, "PRCFG1=%016" PRIx64 ", PRCFG2=%016" PRIx64 ","
-                 " PRCFG3=%016" PRIx64 "\n",
-                 env->CSR_PRCFG1, env->CSR_PRCFG2, env->CSR_PRCFG3);
-    qemu_fprintf(f, "TLBRENTRY=%016" PRIx64 "\n", env->CSR_TLBRENTRY);
-    qemu_fprintf(f, "TLBRBADV=%016" PRIx64 "\n", env->CSR_TLBRBADV);
-    qemu_fprintf(f, "TLBRERA=%016" PRIx64 "\n", env->CSR_TLBRERA);
-    qemu_fprintf(f, "TCFG=%016" PRIx64 "\n", env->CSR_TCFG);
-    qemu_fprintf(f, "TVAL=%016" PRIx64 "\n", env->CSR_TVAL);
+    /* csr */
+    loongarch_cpu_dump_csr(cs, f);
 
     /* fpr */
     if (flags & CPU_DUMP_FPU) {
diff --git a/target/loongarch/csr.c b/target/loongarch/csr.c
index 87bd24e8cd..7ea0a30450 100644
--- a/target/loongarch/csr.c
+++ b/target/loongarch/csr.c
@@ -9,12 +9,14 @@
 
 #define CSR_OFF_FUNCS(NAME, FL, RD, WR)                    \
     [LOONGARCH_CSR_##NAME] = {                             \
+        .name   = (stringify(NAME)),                       \
         .offset = offsetof(CPULoongArchState, CSR_##NAME), \
         .flags = FL, .readfn = RD, .writefn = WR           \
     }
 
 #define CSR_OFF_ARRAY(NAME, N)                                \
     [LOONGARCH_CSR_##NAME(N)] = {                             \
+        .name   = (stringify(NAME##N)),                       \
         .offset = offsetof(CPULoongArchState, CSR_##NAME[N]), \
         .flags = 0, .readfn = NULL, .writefn = NULL           \
     }
diff --git a/target/loongarch/csr.h b/target/loongarch/csr.h
index deb1aacc33..81a656baae 100644
--- a/target/loongarch/csr.h
+++ b/target/loongarch/csr.h
@@ -17,6 +17,7 @@ enum {
 };
 
 typedef struct {
+    const char *name;
     int offset;
     int flags;
     GenCSRFunc readfn;
-- 
2.39.3