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ContiguousPTE[9/12] modify ihk_mc_pt_clear|free_range

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Change-Id: I75d821b81d351f4fdfd504c791543db174634261
This commit is contained in:
TOIDA,Suguru
2018-11-30 09:18:33 +09:00
committed by Masamichi Takagi
parent c4e5bf6d6b
commit 50de3820ad
1 changed files with 26 additions and 0 deletions
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26
arch/arm64/kernel/memory.c
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@ -1981,6 +1981,8 @@ static int clear_range(struct page_table *pt, struct process_vm *vm,
int error;
struct clear_range_args args;
translation_table_t* tt;
pte_t *ptep;
size_t pgsize;
if ((start < vm->region.user_start)
|| (vm->region.user_end < end)
@ -2001,6 +2003,30 @@ static int clear_range(struct page_table *pt, struct process_vm *vm,
args.memobj = memobj;
args.vm = vm;
ptep = ihk_mc_pt_lookup_pte(pt, (void *)start,
0, NULL, &pgsize, NULL);
if (ptep && pte_is_contiguous(ptep)) {
if (!page_is_contiguous_head(ptep, pgsize)) {
// start pte is not contiguous head
error = split_contiguous_pages(ptep, pgsize);
if (error) {
return error;
}
}
}
ptep = ihk_mc_pt_lookup_pte(pt, (void *)end - 1,
0, NULL, &pgsize, NULL);
if (ptep && pte_is_contiguous(ptep)) {
if (!page_is_contiguous_tail(ptep, pgsize)) {
// end pte is not contiguous tail
error = split_contiguous_pages(ptep, pgsize);
if (error) {
return error;
}
}
}
tt = get_translation_table(pt);
error = initial_lookup.walk(tt, 0, start, end, initial_lookup.callback, &args);
return error;