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KVM: MMU: Move dirty bit updates to a separate function 

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-10-11 15:22:59 +02:00
parent 6bfccdc9ae
commit 5df34a86f9
1 changed files with 15 additions and 8 deletions
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23
drivers/kvm/paging_tmpl.h
View File

@ -69,6 +69,17 @@ struct guest_walker {
u32 error_code;
};
static void FNAME(update_dirty_bit)(struct kvm_vcpu *vcpu,
int write_fault,
pt_element_t *ptep,
gfn_t table_gfn)
{
if (write_fault && !is_dirty_pte(*ptep)) {
mark_page_dirty(vcpu->kvm, table_gfn);
*ptep |= PT_DIRTY_MASK;
}
}
/*
* Fetch a guest pte for a guest virtual address
*/
@ -144,10 +155,8 @@ static int FNAME(walk_addr)(struct guest_walker *walker,
if (walker->level == PT_PAGE_TABLE_LEVEL) {
walker->gfn = (*ptep & PT_BASE_ADDR_MASK)
>> PAGE_SHIFT;
if (write_fault && !is_dirty_pte(*ptep)) {
mark_page_dirty(vcpu->kvm, table_gfn);
*ptep |= PT_DIRTY_MASK;
}
FNAME(update_dirty_bit)(vcpu, write_fault, ptep,
table_gfn);
break;
}
@ -157,10 +166,8 @@ static int FNAME(walk_addr)(struct guest_walker *walker,
walker->gfn = (*ptep & PT_DIR_BASE_ADDR_MASK)
>> PAGE_SHIFT;
walker->gfn += PT_INDEX(addr, PT_PAGE_TABLE_LEVEL);
if (write_fault && !is_dirty_pte(*ptep)) {
mark_page_dirty(vcpu->kvm, table_gfn);
*ptep |= PT_DIRTY_MASK;
}
FNAME(update_dirty_bit)(vcpu, write_fault, ptep,
table_gfn);
break;
}