ARM: hyp-stub: Define a return value for failed stub calls
Define a standard return value to be returned when a hyp stub
call fails.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
diff --git a/arch/arm/include/asm/virt.h b/arch/arm/include/asm/virt.h
index 4ea16fc..c16f70d 100644
--- a/arch/arm/include/asm/virt.h
+++ b/arch/arm/include/asm/virt.h
@@ -104,4 +104,6 @@ extern char __hyp_text_end[];
#endif /* __ASSEMBLY__ */
+#define HVC_STUB_ERR 0xbadca11
+
#endif /* ! VIRT_H */
diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index 15eaa14..b20ca88 100644
--- a/arch/arm/kernel/hyp-stub.S
+++ b/arch/arm/kernel/hyp-stub.S
@@ -216,7 +216,7 @@
bne 1f
bx r1
-1: mov r0, #-1
+1: ldr r0, =HVC_STUB_ERR
__hyp_stub_exit:
__ERET