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ihk_mc_pt_virt_to_pagemap: refactor

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NAKAMURA Gou
2016-04-21 22:25:46 +09:00
parent 328175547f
commit 176f6d23a9
1 changed files with 9 additions and 36 deletions
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45
arch/x86/kernel/memory.c
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@@ -504,48 +504,21 @@ static int __clear_pt_page(struct page_table *pt, void *virt, int largepage)
uint64_t ihk_mc_pt_virt_to_pagemap(struct page_table *pt, unsigned long virt)
{
int l4idx, l3idx, l2idx, l1idx;
unsigned long v = (unsigned long)virt;
uint64_t ret = 0;
int error;
unsigned long phys;
uint64_t pagemap;
if (!pt) {
pt = init_pt;
error = ihk_mc_pt_virt_to_phys(pt, (void *)virt, &phys);
if (error) {
return 0;
}
GET_VIRT_INDICES(v, l4idx, l3idx, l2idx, l1idx);
pagemap = PM_PFRAME(phys >> PAGE_SHIFT);
pagemap |= PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
if (!(pt->entry[l4idx] & PFL4_PRESENT)) {
return ret;
}
pt = phys_to_virt(pt->entry[l4idx] & PAGE_MASK);
if (!(pt->entry[l3idx] & PFL3_PRESENT)) {
return ret;
}
pt = phys_to_virt(pt->entry[l3idx] & PAGE_MASK);
if (!(pt->entry[l2idx] & PFL2_PRESENT)) {
return ret;
}
if ((pt->entry[l2idx] & PFL2_SIZE)) {
ret = PM_PFRAME(((pt->entry[l2idx] & LARGE_PAGE_MASK) +
(v & (LARGE_PAGE_SIZE - 1))) >> PAGE_SHIFT);
ret |= PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
return ret;
}
pt = phys_to_virt(pt->entry[l2idx] & PAGE_MASK);
if (!(pt->entry[l1idx] & PFL1_PRESENT)) {
return ret;
}
ret = PM_PFRAME((pt->entry[l1idx] & PT_PHYSMASK) >> PAGE_SHIFT);
ret |= PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
return ret;
return pagemap;
}
int ihk_mc_pt_virt_to_phys(struct page_table *pt,
const void *virt, unsigned long *phys)
{