x86/kasan: Add helpers to align shadow addresses up and down

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Add helpers to dedup code for aligning shadow address up/down to page
boundaries when translating an address to its shadow.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Link: https://lkml.kernel.org/r/20221110203504.1985010-5-seanjc@google.com

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Sean Christopherson 2022-11-10 20:35:03 +00:00 • committed by Dave Hansen

parent 7077d2ccb9

commit bde258d974

1 changed files with 22 additions and 18 deletions

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arch/x86/mm/kasan_init_64.c

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