riscv: add alignment for text, rodata and data sections

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The kernel mapping will tried to optimize its mapping by using bigger
size. In rv64, it tries to use PMD_SIZE, and tryies to use PGDIR_SIZE in
rv32. To ensure that the start address of these sections could fit the
mapping entry size, make them align to the biggest alignment.

Define a macro SECTION_ALIGN because the HPAGE_SIZE or PMD_SIZE, etc.,
are invisible in linker script.

This patch is prepared for STRICT_KERNEL_RWX support.

Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Zong Li 2020-03-10 00:55:40 +08:00 • committed by Palmer Dabbelt

parent bd3d914d16

commit 00cb41d5ad

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2 changed files with 17 additions and 1 deletions

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13

arch/riscv/include/asm/set_memory.h

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5

arch/riscv/kernel/vmlinux.lds.S

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