target/riscv/kvm/kvm-cpu.c | 5 +++--
target/riscv/sbi_ecall_interface.h | 11 +++++++++++
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index 6a6c6cae80..a4f84ad950 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -1404,7 +1404,7 @@ static int kvm_riscv_handle_sbi(CPUState *cs, struct
kvm_run *run)
if (ret == sizeof(ch)) {
run->riscv_sbi.ret[0] = ch;
} else {
- run->riscv_sbi.ret[0] = -1;
+ run->riscv_sbi.ret[0] = SBI_ERR_FAILURE;
}
ret = 0;
break;
@@ -1412,7 +1412,8 @@ static int kvm_riscv_handle_sbi(CPUState *cs, struct
kvm_run *run)
qemu_log_mask(LOG_UNIMP,
"%s: un-handled SBI EXIT, specific reasons is %lu\n",
__func__, run->riscv_sbi.extension_id);
- ret = -1;
+ run->riscv_sbi.ret[0] = SBI_ERR_NOT_SUPPORTED;
+ ret = 0;
break;
}
return ret;
diff --git a/target/riscv/sbi_ecall_interface.h
b/target/riscv/sbi_ecall_interface.h
index 43899d08f6..0279e92a36 100644
--- a/target/riscv/sbi_ecall_interface.h
+++ b/target/riscv/sbi_ecall_interface.h
@@ -69,4 +69,15 @@
#define SBI_EXT_VENDOR_END 0x09FFFFFF
/* clang-format on */
+/* SBI return error codes */
+#define SBI_SUCCESS 0
+#define SBI_ERR_FAILURE -1
+#define SBI_ERR_NOT_SUPPORTED -2
+#define SBI_ERR_INVALID_PARAM -3
+#define SBI_ERR_DENIED -4
+#define SBI_ERR_INVALID_ADDRESS -5
+#define SBI_ERR_ALREADY_AVAILABLE -6
+#define SBI_ERR_ALREADY_STARTED -7
+#define SBI_ERR_ALREADY_STOPPED -8
+
#endif