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riscv: kexec: Align the kexeced kernel entry
The current riscv boot protocol requires 2MB alignment for RV64
and 4MB alignment for RV32.
In KEXEC_FILE path, the elf_find_pbase() function should align
the kexeced kernel entry according to the requirement, otherwise
the kexeced kernel would silently BUG at the setup_vm().
Fixes: 8acea455fa
("RISC-V: Support for kexec_file on panic")
Signed-off-by: Song Shuai <songshuaishuai@tinylab.org>
Link: https://lore.kernel.org/r/20230906095817.364390-1-songshuaishuai@tinylab.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
parent
0bb80ecc33
commit
1bfb2b618d
@ -98,7 +98,13 @@ static int elf_find_pbase(struct kimage *image, unsigned long kernel_len,
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kbuf.image = image;
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kbuf.buf_min = lowest_paddr;
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kbuf.buf_max = ULONG_MAX;
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kbuf.buf_align = PAGE_SIZE;
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/*
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* Current riscv boot protocol requires 2MB alignment for
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* RV64 and 4MB alignment for RV32
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*
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*/
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kbuf.buf_align = PMD_SIZE;
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kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
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kbuf.memsz = ALIGN(kernel_len, PAGE_SIZE);
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kbuf.top_down = false;
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