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ContiguousPTE[2/12] modify copy_user_pte

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Change-Id: Ie696245a8c09e87c48426bc3e74a6f049a085471
This commit is contained in:
TOIDA,Suguru
2018-11-30 09:17:54 +09:00
committed by Masamichi Takagi
parent d1b36aab62
commit b6de164e9a
2 changed files with 101 additions and 2 deletions
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17
kernel/process.c
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@@ -646,11 +646,11 @@ static int copy_user_pte(void *arg0, page_table_t src_pt, pte_t *src_ptep, void
intptr_t src_phys;
struct page *src_page;
void *src_kvirt;
const size_t pgsize = (size_t)1 << pgshift;
size_t pgsize = (size_t)1 << pgshift;
int npages;
void *virt = NULL;
intptr_t phys;
const int pgalign = pgshift - PAGE_SHIFT;
int pgalign = pgshift - PAGE_SHIFT;
enum ihk_mc_pt_attribute attr;
if (!pte_is_present(src_ptep)) {
@@ -672,6 +672,19 @@ static int copy_user_pte(void *arg0, page_table_t src_pt, pte_t *src_ptep, void
attr = pte_get_attr(src_ptep, pgsize);
}
else {
if (pte_is_contiguous(src_ptep)) {
if (page_is_contiguous_head(src_ptep, pgsize)) {
int level = pgsize_to_tbllv(pgsize);
pgsize = tbllv_to_contpgsize(level);
pgalign = tbllv_to_contpgshift(level);
pgalign -= PAGE_SHIFT;
} else {
error = 0;
goto out;
}
}
dkprintf("copy_user_pte(): 0x%lx PTE found\n", pgaddr);
dkprintf("copy_user_pte(): page size: %d\n", pgsize);