riscv: Cleanup KASAN_VMALLOC support

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When KASAN vmalloc region is populated, there is no userspace process and
the page table in use is swapper_pg_dir, so there is no need to read
SATP. Then we can use the same scheme used by kasan_populate_p*d
functions to go through the page table, which harmonizes the code.

In addition, make use of set_pgd that goes through all unused page table
levels, contrary to p*d_populate functions, which makes this function work
whatever the number of page table levels.

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Alexandre Ghiti 2021-03-13 03:45:05 -05:00 • committed by Palmer Dabbelt

parent f35bb4b8d1

commit 2da073c196

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1 changed files with 18 additions and 41 deletions

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arch/riscv/mm/kasan_init.c

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