[PATCH] firmware: payload: test: Add SBI shutdown call after test message

[Xiang W]

Previously, 'make run' would hang in WFI after printing the test message.
This commit adds an SBI ecall to ensure QEMU exits cleanly after the test
payload runs.

Signed-off-by: Xiang W <wxjstz at 126.com>
---
 firmware/payloads/test_main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/firmware/payloads/test_main.c b/firmware/payloads/test_main.c
index 194dbbe6..021bc3b8 100644
--- a/firmware/payloads/test_main.c
+++ b/firmware/payloads/test_main.c
@@ -46,6 +46,13 @@ static inline void sbi_ecall_console_puts(const char *str)
 		  sbi_strlen(str), (unsigned long)str, 0, 0, 0, 0);
 }
 
+static inline void sbi_ecall_shutdown(void)
+{
+	sbi_ecall(SBI_EXT_SRST, SBI_EXT_SRST_RESET,
+		  SBI_SRST_RESET_TYPE_SHUTDOWN, SBI_SRST_RESET_REASON_NONE,
+		  0, 0, 0, 0);
+}
+
 #define wfi()                                             \
 	do {                                              \
 		__asm__ __volatile__("wfi" ::: "memory"); \
@@ -54,6 +61,7 @@ static inline void sbi_ecall_console_puts(const char *str)
 void test_main(unsigned long a0, unsigned long a1)
 {
 	sbi_ecall_console_puts("\nTest payload running\n");
+	sbi_ecall_shutdown();
 
 	while (1)
 		wfi();
-- 
2.47.2