/**
* toi_copy_pageset1 - do the atomic copy of pageset1
*
* Make the atomic copy of pageset1. We can't use copy_page (as we once did)
* because we can't be sure what side effects it has. On my old Duron, with
* 3DNOW, kernel_fpu_begin increments preempt count, making our preempt
* count at resume time 4 instead of 3.
*
* We don't want to call kmap_atomic unconditionally because it has the side
* effect of incrementing the preempt count, which will leave it one too high
* post resume (the page containing the preempt count will be copied after
* its incremented. This is essentially the same problem.
**/
void toi_copy_pageset1(void)
{
int i;
unsigned long source_index, dest_index;
memory_bm_position_reset(pageset1_map);
memory_bm_position_reset(pageset1_copy_map);
source_index = memory_bm_next_pfn(pageset1_map);
dest_index = memory_bm_next_pfn(pageset1_copy_map);
for (i = 0; i < pagedir1.size; i++) {
unsigned long *origvirt, *copyvirt;
struct page *origpage, *copypage;
int loop = (PAGE_SIZE / sizeof(unsigned long)) - 1,
was_present1, was_present2;
origpage = pfn_to_page(source_index);
copypage = pfn_to_page(dest_index);
origvirt = PageHighMem(origpage) ?
kmap_atomic(origpage) :
page_address(origpage);
copyvirt = PageHighMem(copypage) ?
kmap_atomic(copypage) :
page_address(copypage);
was_present1 = kernel_page_present(origpage);
if (!was_present1)
kernel_map_pages(origpage, 1, 1);
was_present2 = kernel_page_present(copypage);
if (!was_present2)
kernel_map_pages(copypage, 1, 1);
while (loop >= 0) {
*(copyvirt + loop) = *(origvirt + loop);
loop--;
}
if (!was_present1)
kernel_map_pages(origpage, 1, 0);
if (!was_present2)
kernel_map_pages(copypage, 1, 0);
if (PageHighMem(origpage))
kunmap_atomic(origvirt);
if (PageHighMem(copypage))
kunmap_atomic(copyvirt);
source_index = memory_bm_next_pfn(pageset1_map);
dest_index = memory_bm_next_pfn(pageset1_copy_map);
}
}
/**
* toi_copy_pageset1 - do the atomic copy of pageset1
*
* Make the atomic copy of pageset1. We can't use copy_page (as we once did)
* because we can't be sure what side effects it has. On my old Duron, with
* 3DNOW, kernel_fpu_begin increments preempt count, making our preempt
* count at resume time 4 instead of 3.
*
* We don't want to call kmap_atomic unconditionally because it has the side
* effect of incrementing the preempt count, which will leave it one too high
* post resume (the page containing the preempt count will be copied after
* its incremented. This is essentially the same problem.
**/
void toi_copy_pageset1(void)
{
int i;
unsigned long source_index, dest_index;
memory_bm_position_reset(pageset1_map);
memory_bm_position_reset(pageset1_copy_map);
source_index = memory_bm_next_pfn(pageset1_map);
dest_index = memory_bm_next_pfn(pageset1_copy_map);
for (i = 0; i < pagedir1.size; i++) {
unsigned long *origvirt, *copyvirt;
struct page *origpage, *copypage;
int loop = (PAGE_SIZE / sizeof(unsigned long)) - 1, was_present1, was_present2;
#ifdef CONFIG_TOI_ENHANCE
if (!pfn_valid(source_index) || !pfn_valid(dest_index)) {
pr_emerg("[%s] (%d) dest_index:%lu, source_index:%lu\n", __func__, i,
dest_index, source_index);
set_abort_result(TOI_ARCH_PREPARE_FAILED);
return;
}
#endif
origpage = pfn_to_page(source_index);
copypage = pfn_to_page(dest_index);
origvirt = PageHighMem(origpage) ? kmap_atomic(origpage) : page_address(origpage);
copyvirt = PageHighMem(copypage) ? kmap_atomic(copypage) : page_address(copypage);
was_present1 = kernel_page_present(origpage);
if (!was_present1)
kernel_map_pages(origpage, 1, 1);
was_present2 = kernel_page_present(copypage);
if (!was_present2)
kernel_map_pages(copypage, 1, 1);
while (loop >= 0) {
*(copyvirt + loop) = *(origvirt + loop);
loop--;
}
if (!was_present1)
kernel_map_pages(origpage, 1, 0);
if (!was_present2)
kernel_map_pages(copypage, 1, 0);
if (PageHighMem(origpage))
kunmap_atomic(origvirt);
if (PageHighMem(copypage))
kunmap_atomic(copyvirt);
source_index = memory_bm_next_pfn(pageset1_map);
dest_index = memory_bm_next_pfn(pageset1_copy_map);
}
}
