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aarch64: clear instruction cache on new pages when forking

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This commit is contained in:
K. Lange 2022-03-07 09:20:19 +09:00
parent 523a3a0159
commit 2700849ca2
1 changed files with 9 additions and 1 deletions
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10
kernel/arch/aarch64/mmu.c
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@ -379,7 +379,15 @@ static int copy_page_maybe(union PML * pt_in, union PML * pt_out, size_t l, uint
mmu_frame_set(newPage);
char * page_out = mmu_map_from_physical(newPage);
memcpy(page_out,page_in,PAGE_SIZE);
asm volatile ("" ::: "memory");
asm volatile ("dmb sy\nisb" ::: "memory");
for (uintptr_t x = (uintptr_t)page_out; x < (uintptr_t)page_out + PAGE_SIZE; x += 64) {
asm volatile ("dc cvau, %0" :: "r"(x));
}
for (uintptr_t x = (uintptr_t)page_out; x < (uintptr_t)page_out + PAGE_SIZE; x += 64) {
asm volatile ("ic ivau, %0" :: "r"(x));
}
pt_out[l].raw = 0;
pt_out[l].bits.table_page = 1;
pt_out[l].bits.present = 1;