From: Bibo Mao <maobibo@loongson.cn>
Date: Thu, 30 Oct 2025 08:17:24 +0000 (+0800)
Subject: target/loongarch: Add PMU register dump support in KVM
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9870fe1ec40dba64baeafa7a8b7c4763afd1673;p=thirdparty%2Fqemu.git

target/loongarch: Add PMU register dump support in KVM

PMU is supported in KVM mode. With info registers command, PMU CSR
registers should be dumped also. And it is not necessary in TCG mode.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
---

diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 67ad9c3b79..b653948526 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -129,6 +129,11 @@ static void loongarch_la464_init_csr(DeviceState *dev)
         set_csr_flag(LOONGARCH_CSR_MERRERA, CSRFL_UNUSED);
         set_csr_flag(LOONGARCH_CSR_MERRSAVE, CSRFL_UNUSED);
         set_csr_flag(LOONGARCH_CSR_CTAG, CSRFL_UNUSED);
+
+        for (i = env->perf_event_num; i < MAX_PERF_EVENTS; i++) {
+            set_csr_flag(LOONGARCH_CSR_PERFCTRL(i), CSRFL_UNUSED);
+            set_csr_flag(LOONGARCH_CSR_PERFCNTR(i), CSRFL_UNUSED);
+        }
     }
 #endif
 }
diff --git a/target/loongarch/csr.c b/target/loongarch/csr.c
index f973780bba..332a1396cc 100644
--- a/target/loongarch/csr.c
+++ b/target/loongarch/csr.c
@@ -94,6 +94,38 @@ static CSRInfo csr_info[] = {
     CSR_OFF_ARRAY(DMW, 1),
     CSR_OFF_ARRAY(DMW, 2),
     CSR_OFF_ARRAY(DMW, 3),
+    CSR_OFF_ARRAY(PERFCTRL, 0),
+    CSR_OFF_ARRAY(PERFCNTR, 0),
+    CSR_OFF_ARRAY(PERFCTRL, 1),
+    CSR_OFF_ARRAY(PERFCNTR, 1),
+    CSR_OFF_ARRAY(PERFCTRL, 2),
+    CSR_OFF_ARRAY(PERFCNTR, 2),
+    CSR_OFF_ARRAY(PERFCTRL, 3),
+    CSR_OFF_ARRAY(PERFCNTR, 3),
+    CSR_OFF_ARRAY(PERFCTRL, 4),
+    CSR_OFF_ARRAY(PERFCNTR, 4),
+    CSR_OFF_ARRAY(PERFCTRL, 5),
+    CSR_OFF_ARRAY(PERFCNTR, 5),
+    CSR_OFF_ARRAY(PERFCTRL, 6),
+    CSR_OFF_ARRAY(PERFCNTR, 6),
+    CSR_OFF_ARRAY(PERFCTRL, 7),
+    CSR_OFF_ARRAY(PERFCNTR, 7),
+    CSR_OFF_ARRAY(PERFCTRL, 8),
+    CSR_OFF_ARRAY(PERFCNTR, 8),
+    CSR_OFF_ARRAY(PERFCTRL, 9),
+    CSR_OFF_ARRAY(PERFCNTR, 9),
+    CSR_OFF_ARRAY(PERFCTRL, 10),
+    CSR_OFF_ARRAY(PERFCNTR, 10),
+    CSR_OFF_ARRAY(PERFCTRL, 11),
+    CSR_OFF_ARRAY(PERFCNTR, 11),
+    CSR_OFF_ARRAY(PERFCTRL, 12),
+    CSR_OFF_ARRAY(PERFCNTR, 12),
+    CSR_OFF_ARRAY(PERFCTRL, 13),
+    CSR_OFF_ARRAY(PERFCNTR, 13),
+    CSR_OFF_ARRAY(PERFCTRL, 14),
+    CSR_OFF_ARRAY(PERFCNTR, 14),
+    CSR_OFF_ARRAY(PERFCTRL, 15),
+    CSR_OFF_ARRAY(PERFCNTR, 15),
     CSR_OFF(DBG),
     CSR_OFF(DERA),
     CSR_OFF(DSAVE),