[PULL v2 05/11] target/loongarch: add msg interrupt CSR registers

[Song Gao]

include CSR_MSGIS0-3, CSR_MSGIR and CSR_MSGIE.

Reviewed-by: Bibo Mao <maob...@loongson.cn>
Signed-off-by: Song Gao <gaos...@loongson.cn>
Message-ID: <20250916122109.749813-6-gaos...@loongson.cn>
---
 target/loongarch/cpu-csr.h |  3 +++
 target/loongarch/cpu.h     | 11 +++++++++++
 target/loongarch/machine.c | 25 +++++++++++++++++++++++--
 3 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/target/loongarch/cpu-csr.h b/target/loongarch/cpu-csr.h
index 0834e91f30..4792677086 100644
--- a/target/loongarch/cpu-csr.h
+++ b/target/loongarch/cpu-csr.h
@@ -186,6 +186,9 @@ FIELD(CSR_MERRCTL, ISMERR, 0, 1)
 
 #define LOONGARCH_CSR_CTAG           0x98 /* TagLo + TagHi */
 
+#define LOONGARCH_CSR_MSGIS(N)       (0xa0 + N)
+#define LOONGARCH_CSR_MSGIR               0xa4
+
 /* Direct map windows CSRs*/
 #define LOONGARCH_CSR_DMW(N)         (0x180 + N)
 FIELD(CSR_DMW, PLV0, 0, 1)
diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 19e00325ca..78210a46d8 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -233,6 +233,13 @@ FIELD(TLB_MISC, ASID, 1, 10)
 FIELD(TLB_MISC, VPPN, 13, 35)
 FIELD(TLB_MISC, PS, 48, 6)
 
+/*Msg interrupt registers */
+#define N_MSGIS                4
+FIELD(CSR_MSGIS, IS, 0, 63)
+FIELD(CSR_MSGIR, INTNUM, 0, 8)
+FIELD(CSR_MSGIR, ACTIVE, 31, 1)
+FIELD(CSR_MSGIE, PT, 0, 8)
+
 #define LSX_LEN    (128)
 #define LASX_LEN   (256)
 
@@ -350,6 +357,10 @@ typedef struct CPUArchState {
     uint64_t CSR_DBG;
     uint64_t CSR_DERA;
     uint64_t CSR_DSAVE;
+    /* Msg interrupt registers */
+    uint64_t CSR_MSGIS[N_MSGIS];
+    uint64_t CSR_MSGIR;
+    uint64_t CSR_MSGIE;
     struct {
         uint64_t guest_addr;
     } stealtime;
diff --git a/target/loongarch/machine.c b/target/loongarch/machine.c
index 4e70f5c879..73190fb367 100644
--- a/target/loongarch/machine.c
+++ b/target/loongarch/machine.c
@@ -45,6 +45,26 @@ static const VMStateDescription vmstate_fpu = {
     },
 };
 
+static bool msgint_needed(void *opaque)
+{
+    LoongArchCPU *cpu = opaque;
+
+    return FIELD_EX64(cpu->env.cpucfg[1], CPUCFG1, MSG_INT);
+}
+
+static const VMStateDescription vmstate_msgint = {
+    .name = "cpu/msgint",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = msgint_needed,
+    .fields = (const VMStateField[]) {
+        VMSTATE_UINT64_ARRAY(env.CSR_MSGIS, LoongArchCPU, N_MSGIS),
+        VMSTATE_UINT64(env.CSR_MSGIR, LoongArchCPU),
+        VMSTATE_UINT64(env.CSR_MSGIE, LoongArchCPU),
+        VMSTATE_END_OF_LIST()
+    },
+};
+
 static const VMStateDescription vmstate_lsxh_reg = {
     .name = "lsxh_reg",
     .version_id = 1,
@@ -168,8 +188,8 @@ static const VMStateDescription vmstate_tlb = {
 /* LoongArch CPU state */
 const VMStateDescription vmstate_loongarch_cpu = {
     .name = "cpu",
-    .version_id = 3,
-    .minimum_version_id = 3,
+    .version_id = 4,
+    .minimum_version_id = 4,
     .fields = (const VMStateField[]) {
         VMSTATE_UINTTL_ARRAY(env.gpr, LoongArchCPU, 32),
         VMSTATE_UINTTL(env.pc, LoongArchCPU),
@@ -245,6 +265,7 @@ const VMStateDescription vmstate_loongarch_cpu = {
         &vmstate_tlb,
 #endif
         &vmstate_lbt,
+        &vmstate_msgint,
         NULL
     }
 };
-- 
2.47.0