From: Samuel Holland <samuel@xxxxxxxxxxxx>
[ Upstream commit 0c49688174f5347c3f8012e84c0ffa0d2b2890c8 ]
The patch function for the T-Head PBMT errata calls __pa_symbol() before
relocation. This crashes when CONFIG_DEBUG_VIRTUAL is enabled, because
__pa_symbol() forwards to __phys_addr_symbol(), and __phys_addr_symbol()
checks against the absolute kernel start/end address.
Fix this by checking against the kernel map instead of a symbol address.
Fixes: a35707c3d850 ("riscv: add memory-type errata for T-Head")
Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx>
Tested-by: Heiko Stuebner <heiko@xxxxxxxxx>
Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221126060920.65009-1-samuel@xxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/riscv/mm/physaddr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/mm/physaddr.c b/arch/riscv/mm/physaddr.c
index 19cf25a74ee2..9b18bda74154 100644
--- a/arch/riscv/mm/physaddr.c
+++ b/arch/riscv/mm/physaddr.c
@@ -22,7 +22,7 @@ EXPORT_SYMBOL(__virt_to_phys);
phys_addr_t __phys_addr_symbol(unsigned long x)
{
unsigned long kernel_start = kernel_map.virt_addr;
- unsigned long kernel_end = (unsigned long)_end;
+ unsigned long kernel_end = kernel_start + kernel_map.size;
/*
* Boundary checking aginst the kernel image mapping.
--
2.35.1
