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| author | Samuel Holland <samuel@sholland.org> | 2022-11-26 07:09:19 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-12-09 02:22:53 +0100 |
| commit | 0c49688174f5347c3f8012e84c0ffa0d2b2890c8 (patch) | |
| tree | b64ab8c2728beefcc0de81793c1ce9ea8aea37fc /arch/riscv/mm | |
| parent | Linux 6.1-rc1 (diff) | |
| download | linux-0c49688174f5347c3f8012e84c0ffa0d2b2890c8.tar.xz linux-0c49688174f5347c3f8012e84c0ffa0d2b2890c8.zip | |
riscv: Fix crash during early errata patching
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@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20221126060920.65009-1-samuel@sholland.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/mm')
| -rw-r--r-- | arch/riscv/mm/physaddr.c | 2 |
1 files changed, 1 insertions, 1 deletions
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. |