[PATCH] lib: sbi: warning when PMP is not present.

[Xiang W]

We need to output a warning message if PMP is not present.

Signed-off-by: Xiang W <wangxiang at iscas.ac.cn>
---
 lib/sbi/sbi_hart_protection.c | 2 +-
 lib/sbi/sbi_init.c            | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/sbi/sbi_hart_protection.c b/lib/sbi/sbi_hart_protection.c
index fbebfd1a..1965eb20 100644
--- a/lib/sbi/sbi_hart_protection.c
+++ b/lib/sbi/sbi_hart_protection.c
@@ -54,7 +54,7 @@ int sbi_hart_protection_configure(struct sbi_scratch *scratch)
 	struct sbi_hart_protection *hprot = sbi_hart_protection_best();
 
 	if (!hprot)
-		return 0;
+		return SBI_ENODEV;
 	if (!hprot->configure)
 		return SBI_ENOSYS;
 
diff --git a/lib/sbi/sbi_init.c b/lib/sbi/sbi_init.c
index 5259064b..34880b5f 100644
--- a/lib/sbi/sbi_init.c
+++ b/lib/sbi/sbi_init.c
@@ -397,7 +397,8 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
 	if (rc) {
 		sbi_printf("%s: hart isolation configure failed (error %d)\n",
 			   __func__, rc);
-		sbi_hart_hang();
+		if (rc != SBI_ENODEV)
+			sbi_hart_hang();
 	}
 
 	count = sbi_scratch_offset_ptr(scratch, init_count_offset);
-- 
2.47.3