riscv/kasan: add KASAN_VMALLOC support

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It references to x86/s390 architecture.

So, it doesn't map the early shadow page to cover VMALLOC space.

Prepopulate top level page table for the range that would otherwise be
empty.

lower levels are filled dynamically upon memory allocation while
booting.

Signed-off-by: Nylon Chen <nylon7@andestech.com>
Signed-off-by: Nick Hu <nickhu@andestech.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Nylon Chen 2021-01-16 13:58:35 +08:00 • committed by Palmer Dabbelt

parent aec33b54af

commit e178d670f2

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2 changed files with 57 additions and 1 deletions

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1

arch/riscv/Kconfig

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57

arch/riscv/mm/kasan_init.c

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