linux-kernel - [PATCH 13/17] riscv: poison SBI calls for M-mode

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Message-Id: <20190624054311.30256-14-hch@lst.de>
Date:   Mon, 24 Jun 2019 07:43:07 +0200
From:   Christoph Hellwig <hch@....de>
To:     Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>
Cc:     Damien Le Moal <damien.lemoal@....com>,
        linux-riscv@...ts.infradead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 13/17] riscv: poison SBI calls for M-mode

There is no SBI when we run in M-mode, so fail the compile for any code
trying to use SBI calls.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 arch/riscv/include/asm/sbi.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 21134b3ef404..1e17f07eadaf 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -8,6 +8,7 @@
 
 #include <linux/types.h>
 
+#ifndef CONFIG_M_MODE
 #define SBI_SET_TIMER 0
 #define SBI_CONSOLE_PUTCHAR 1
 #define SBI_CONSOLE_GETCHAR 2
@@ -94,4 +95,5 @@ static inline void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
 	SBI_CALL_4(SBI_REMOTE_SFENCE_VMA_ASID, hart_mask, start, size, asid);
 }
 
-#endif
+#endif /* CONFIG_M_MODE */
+#endif /* _ASM_RISCV_SBI_H */
-- 
2.20.1