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KVM: MMU: introduce a common function to get no-dirty-logged slot 

Cleanup the code of pte_prefetch_gfn_to_memslot and mapping_level_dirty_bitmap

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong 2011-03-09 15:43:00 +08:00 committed by Marcelo Tosatti
parent 40dcaa9f69
commit 5d163b1c9d
1 changed files with 17 additions and 20 deletions
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37
arch/x86/kvm/mmu.c
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@ -549,13 +549,23 @@ static int host_mapping_level(struct kvm *kvm, gfn_t gfn)
return ret;
}
static bool mapping_level_dirty_bitmap(struct kvm_vcpu *vcpu, gfn_t large_gfn)
static struct kvm_memory_slot *
gfn_to_memslot_dirty_bitmap(struct kvm_vcpu *vcpu, gfn_t gfn,
bool no_dirty_log)
{
struct kvm_memory_slot *slot;
slot = gfn_to_memslot(vcpu->kvm, large_gfn);
if (slot && slot->dirty_bitmap)
return true;
return false;
slot = gfn_to_memslot(vcpu->kvm, gfn);
if (!slot || slot->flags & KVM_MEMSLOT_INVALID ||
(no_dirty_log && slot->dirty_bitmap))
slot = NULL;
return slot;
}
static bool mapping_level_dirty_bitmap(struct kvm_vcpu *vcpu, gfn_t large_gfn)
{
return gfn_to_memslot_dirty_bitmap(vcpu, large_gfn, true);
}
static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn)
@ -2145,26 +2155,13 @@ static void nonpaging_new_cr3(struct kvm_vcpu *vcpu)
{
}
static struct kvm_memory_slot *
pte_prefetch_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn, bool no_dirty_log)
{
struct kvm_memory_slot *slot;
slot = gfn_to_memslot(vcpu->kvm, gfn);
if (!slot || slot->flags & KVM_MEMSLOT_INVALID ||
(no_dirty_log && slot->dirty_bitmap))
slot = NULL;
return slot;
}
static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn,
bool no_dirty_log)
{
struct kvm_memory_slot *slot;
unsigned long hva;
slot = pte_prefetch_gfn_to_memslot(vcpu, gfn, no_dirty_log);
slot = gfn_to_memslot_dirty_bitmap(vcpu, gfn, no_dirty_log);
if (!slot) {
get_page(bad_page);
return page_to_pfn(bad_page);
@ -2185,7 +2182,7 @@ static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu,
gfn_t gfn;
gfn = kvm_mmu_page_get_gfn(sp, start - sp->spt);
if (!pte_prefetch_gfn_to_memslot(vcpu, gfn, access & ACC_WRITE_MASK))
if (!gfn_to_memslot_dirty_bitmap(vcpu, gfn, access & ACC_WRITE_MASK))
return -1;
ret = gfn_to_page_many_atomic(vcpu->kvm, gfn, pages, end - start);