[PATCH AUTOSEL 5.4 38/42] riscv: Set text_offset correctly for M-Mode

[PATCH AUTOSEL 5.4 38/42] riscv: Set text_offset correctly for M-Mode

[Sasha Levin]

From: Sean Anderson <seanga2@gmail.com>

[ Upstream commit 79605f1394261995c2b955c906a5a20fb27cdc84 ]

M-Mode Linux is loaded at the start of RAM, not 2MB later. Perhaps this
should be calculated based on PAGE_OFFSET somehow? Even better would be to
deprecate text_offset and instead introduce something absolute.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/riscv/kernel/head.S | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
index 72f89b7590dd6..344793159b97d 100644
--- a/arch/riscv/kernel/head.S
+++ b/arch/riscv/kernel/head.S
@@ -26,12 +26,17 @@ ENTRY(_start)
 	/* reserved */
 	.word 0
 	.balign 8
+#ifdef CONFIG_RISCV_M_MODE
+	/* Image load offset (0MB) from start of RAM for M-mode */
+	.dword 0
+#else
 #if __riscv_xlen == 64
 	/* Image load offset(2MB) from start of RAM */
 	.dword 0x200000
 #else
 	/* Image load offset(4MB) from start of RAM */
 	.dword 0x400000
+#endif
 #endif
 	/* Effective size of kernel image */
 	.dword _end - _start
-- 
2.27.0


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