[kvm-unit-tests PATCH v2] riscv: lib: sbi_shutdown add pass/fail exit code.

[Jesse Taube]

When exiting it may be useful for the sbi implementation to know if
kvm-unit-tests passed or failed.
Add exit code to sbi_shutdown, and use it in exit() to pass
success/failure (0/1) to sbi.

Signed-off-by: Jesse Taube <jesse at rivosinc.com>
---
 lib/riscv/asm/sbi.h | 2 +-
 lib/riscv/io.c      | 2 +-
 lib/riscv/sbi.c     | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/riscv/asm/sbi.h b/lib/riscv/asm/sbi.h
index a5738a5c..de11c109 100644
--- a/lib/riscv/asm/sbi.h
+++ b/lib/riscv/asm/sbi.h
@@ -250,7 +250,7 @@ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
 			unsigned long arg3, unsigned long arg4,
 			unsigned long arg5);
 
-void sbi_shutdown(void);
+void sbi_shutdown(unsigned int code);
 struct sbiret sbi_hart_start(unsigned long hartid, unsigned long entry, unsigned long sp);
 struct sbiret sbi_hart_stop(void);
 struct sbiret sbi_hart_get_status(unsigned long hartid);
diff --git a/lib/riscv/io.c b/lib/riscv/io.c
index fb40adb7..0bde25d4 100644
--- a/lib/riscv/io.c
+++ b/lib/riscv/io.c
@@ -150,7 +150,7 @@ void halt(int code);
 void exit(int code)
 {
 	printf("\nEXIT: STATUS=%d\n", ((code) << 1) | 1);
-	sbi_shutdown();
+	sbi_shutdown(!!code);
 	halt(code);
 	__builtin_unreachable();
 }
diff --git a/lib/riscv/sbi.c b/lib/riscv/sbi.c
index 2959378f..9dd11e9d 100644
--- a/lib/riscv/sbi.c
+++ b/lib/riscv/sbi.c
@@ -107,9 +107,9 @@ struct sbiret sbi_sse_inject(unsigned long event_id, unsigned long hart_id)
 	return sbi_ecall(SBI_EXT_SSE, SBI_EXT_SSE_INJECT, event_id, hart_id, 0, 0, 0, 0);
 }
 
-void sbi_shutdown(void)
+void sbi_shutdown(unsigned int code)
 {
-	sbi_ecall(SBI_EXT_SRST, 0, 0, 0, 0, 0, 0, 0);
+	sbi_ecall(SBI_EXT_SRST, 0, 0, code, 0, 0, 0, 0);
 	puts("SBI shutdown failed!\n");
 }
 
-- 
2.43.0