Commit 9d1a6d194e for qemu.org

commit 9d1a6d194ee9e589406df8a54c48b1f3fbd279fa
Author: Bibo Mao <maobibo@loongson.cn>
Date:   Fri Jun 5 16:38:54 2026 +0800

    target/loongarch: Add default CSRFL_BASIC info with flags field

    With CSR array structure, its validity is checked from offset field.
    Now default CSRFL_BASIC information is added with flags field and its
    validility can be checked with flags field.

    Signed-off-by: Bibo Mao <maobibo@loongson.cn>
    Tested-by: Song Gao <gaosong@loongson.cn>
    Message-ID: <20260605083854.175625-1-maobibo@loongson.cn>
    Signed-off-by: Song Gao <gaosong@loongson.cn>

diff --git a/target/loongarch/csr.c b/target/loongarch/csr.c
index fff2312f87..d759be316b 100644
--- a/target/loongarch/csr.c
+++ b/target/loongarch/csr.c
@@ -17,11 +17,11 @@
     [LOONGARCH_CSR_##NAME(N)] = {                             \
         .name   = (stringify(NAME##N)),                       \
         .offset = offsetof(CPULoongArchState, CSR_##NAME[N]), \
-        .flags = 0, .readfn = NULL, .writefn = NULL           \
+        .flags = CSRFL_BASIC, .readfn = NULL, .writefn = NULL           \
     }

 #define CSR_OFF_FLAGS(NAME, FL)   CSR_OFF_FUNCS(NAME, FL, NULL, NULL)
-#define CSR_OFF(NAME)             CSR_OFF_FLAGS(NAME, 0)
+#define CSR_OFF(NAME)             CSR_OFF_FLAGS(NAME, CSRFL_BASIC)

 static CSRInfo csr_info[] = {
     CSR_OFF_FLAGS(CRMD, CSRFL_EXITTB),
@@ -144,7 +144,7 @@ CSRInfo *get_csr(unsigned int csr_num)
     }

     csr = &csr_info[csr_num];
-    if (csr->offset == 0) {
+    if (csr->flags == 0) {
         return NULL;
     }

diff --git a/target/loongarch/csr.h b/target/loongarch/csr.h
index 81a656baae..508a3214fc 100644
--- a/target/loongarch/csr.h
+++ b/target/loongarch/csr.h
@@ -14,6 +14,7 @@ enum {
     CSRFL_EXITTB   = (1 << 1),
     CSRFL_IO       = (1 << 2),
     CSRFL_UNUSED   = (1 << 3),
+    CSRFL_BASIC    = (1 << 4),
 };

 typedef struct {