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KVM: MMU: use slot_handle_level and its helper to clean up the code 

slot_handle_level and its helper functions are ready now, use them to
clean up the code

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiao Guangrong 2015-05-13 14:42:24 +08:00 committed by Paolo Bonzini
parent 1bad2b2a3b
commit d77aa73c70
1 changed files with 16 additions and 112 deletions
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128
arch/x86/kvm/mmu.c
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@ -4523,34 +4523,19 @@ slot_handle_leaf(struct kvm *kvm, struct kvm_memory_slot *memslot,
PT_PAGE_TABLE_LEVEL, lock_flush_tlb);
}
static bool slot_rmap_write_protect(struct kvm *kvm, unsigned long *rmapp)
{
return __rmap_write_protect(kvm, rmapp, false);
}
void kvm_mmu_slot_remove_write_access(struct kvm *kvm,
struct kvm_memory_slot *memslot)
{
gfn_t last_gfn;
int i;
bool flush = false;
last_gfn = memslot->base_gfn + memslot->npages - 1;
bool flush;
spin_lock(&kvm->mmu_lock);
for (i = PT_PAGE_TABLE_LEVEL; i <= PT_MAX_HUGEPAGE_LEVEL; ++i) {
unsigned long *rmapp;
unsigned long last_index, index;
rmapp = memslot->arch.rmap[i - PT_PAGE_TABLE_LEVEL];
last_index = gfn_to_index(last_gfn, memslot->base_gfn, i);
for (index = 0; index <= last_index; ++index, ++rmapp) {
if (*rmapp)
flush |= __rmap_write_protect(kvm, rmapp,
false);
if (need_resched() || spin_needbreak(&kvm->mmu_lock))
cond_resched_lock(&kvm->mmu_lock);
}
}
flush = slot_handle_all_level(kvm, memslot, slot_rmap_write_protect,
false);
spin_unlock(&kvm->mmu_lock);
/*
@ -4611,59 +4596,18 @@ restart:
void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
struct kvm_memory_slot *memslot)
{
bool flush = false;
unsigned long *rmapp;
unsigned long last_index, index;
spin_lock(&kvm->mmu_lock);
rmapp = memslot->arch.rmap[0];
last_index = gfn_to_index(memslot->base_gfn + memslot->npages - 1,
memslot->base_gfn, PT_PAGE_TABLE_LEVEL);
for (index = 0; index <= last_index; ++index, ++rmapp) {
if (*rmapp)
flush |= kvm_mmu_zap_collapsible_spte(kvm, rmapp);
if (need_resched() || spin_needbreak(&kvm->mmu_lock)) {
if (flush) {
kvm_flush_remote_tlbs(kvm);
flush = false;
}
cond_resched_lock(&kvm->mmu_lock);
}
}
if (flush)
kvm_flush_remote_tlbs(kvm);
slot_handle_leaf(kvm, memslot, kvm_mmu_zap_collapsible_spte, true);
spin_unlock(&kvm->mmu_lock);
}
void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
struct kvm_memory_slot *memslot)
{
gfn_t last_gfn;
unsigned long *rmapp;
unsigned long last_index, index;
bool flush = false;
last_gfn = memslot->base_gfn + memslot->npages - 1;
bool flush;
spin_lock(&kvm->mmu_lock);
rmapp = memslot->arch.rmap[PT_PAGE_TABLE_LEVEL - 1];
last_index = gfn_to_index(last_gfn, memslot->base_gfn,
PT_PAGE_TABLE_LEVEL);
for (index = 0; index <= last_index; ++index, ++rmapp) {
if (*rmapp)
flush |= __rmap_clear_dirty(kvm, rmapp);
if (need_resched() || spin_needbreak(&kvm->mmu_lock))
cond_resched_lock(&kvm->mmu_lock);
}
flush = slot_handle_leaf(kvm, memslot, __rmap_clear_dirty, false);
spin_unlock(&kvm->mmu_lock);
lockdep_assert_held(&kvm->slots_lock);
@ -4682,31 +4626,11 @@ EXPORT_SYMBOL_GPL(kvm_mmu_slot_leaf_clear_dirty);
void kvm_mmu_slot_largepage_remove_write_access(struct kvm *kvm,
struct kvm_memory_slot *memslot)
{
gfn_t last_gfn;
int i;
bool flush = false;
last_gfn = memslot->base_gfn + memslot->npages - 1;
bool flush;
spin_lock(&kvm->mmu_lock);
/* skip rmap for 4K page */
for (i = PT_PAGE_TABLE_LEVEL + 1; i <= PT_MAX_HUGEPAGE_LEVEL; ++i) {
unsigned long *rmapp;
unsigned long last_index, index;
rmapp = memslot->arch.rmap[i - PT_PAGE_TABLE_LEVEL];
last_index = gfn_to_index(last_gfn, memslot->base_gfn, i);
for (index = 0; index <= last_index; ++index, ++rmapp) {
if (*rmapp)
flush |= __rmap_write_protect(kvm, rmapp,
false);
if (need_resched() || spin_needbreak(&kvm->mmu_lock))
cond_resched_lock(&kvm->mmu_lock);
}
}
flush = slot_handle_large_level(kvm, memslot, slot_rmap_write_protect,
false);
spin_unlock(&kvm->mmu_lock);
/* see kvm_mmu_slot_remove_write_access */
@ -4720,30 +4644,10 @@ EXPORT_SYMBOL_GPL(kvm_mmu_slot_largepage_remove_write_access);
void kvm_mmu_slot_set_dirty(struct kvm *kvm,
struct kvm_memory_slot *memslot)
{
gfn_t last_gfn;
int i;
bool flush = false;
last_gfn = memslot->base_gfn + memslot->npages - 1;
bool flush;
spin_lock(&kvm->mmu_lock);
for (i = PT_PAGE_TABLE_LEVEL; i <= PT_MAX_HUGEPAGE_LEVEL; ++i) {
unsigned long *rmapp;
unsigned long last_index, index;
rmapp = memslot->arch.rmap[i - PT_PAGE_TABLE_LEVEL];
last_index = gfn_to_index(last_gfn, memslot->base_gfn, i);
for (index = 0; index <= last_index; ++index, ++rmapp) {
if (*rmapp)
flush |= __rmap_set_dirty(kvm, rmapp);
if (need_resched() || spin_needbreak(&kvm->mmu_lock))
cond_resched_lock(&kvm->mmu_lock);
}
}
flush = slot_handle_all_level(kvm, memslot, __rmap_set_dirty, false);
spin_unlock(&kvm->mmu_lock);
lockdep_assert_held(&kvm->slots_lock);