[U-Boot] [PATCH v2 16/29] riscv: invalidate the instruction cache before jumping to Linux

[Lukas Auer]

RISC-V does not guarantee that stores to instruction memory are visible
to instruction fetches (i.e. incoherent instruction caches). Invalidate
the instruction cache to ensure the kernel function pointer points to
the correct memory location.

Signed-off-by: Lukas Auer <lukas.auer at aisec.fraunhofer.de>
---

Changes in v2:
- Clarify reasoning behind patch in commit message

 arch/riscv/lib/bootm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/lib/bootm.c b/arch/riscv/lib/bootm.c
index 2b5ccce933..c1cf618806 100644
--- a/arch/riscv/lib/bootm.c
+++ b/arch/riscv/lib/bootm.c
@@ -40,6 +40,7 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 		return 1;
 
 	kernel = (void (*)(ulong, void *))images->ep;
+	invalidate_icache_all();
 
 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
 
-- 
2.17.2