[PATCH 3/3] lib: sbi: sw check exception delegation

[Deepak Gupta <debug@rivosinc.com>]

zicfiss and zicfilp introduces new exception (cause=18). Delegate this
exception to S mode because cfi violations in U / S will be reported
via this exception.

Signed-off-by: Deepak Gupta <debug@rivosinc.com>
---
 lib/sbi/sbi_hart.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index 67a2e42..5bc02a1 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -234,6 +234,9 @@ static int delegate_traps(struct sbi_scratch *scratch)
 		exceptions |= (1U << CAUSE_STORE_GUEST_PAGE_FAULT);
 	}
 
+	/* delegate sw check exception to S */
+	exceptions |= (1U << CAUSE_SW_CHECK_EXCP);
+
 	csr_write(CSR_MIDELEG, interrupts);
 	csr_write(CSR_MEDELEG, exceptions);
 
-- 
2.44.0