summaryrefslogtreecommitdiff
path: root/arch/x86/kvm/paging_tmpl.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kvm/paging_tmpl.h')
-rw-r--r--arch/x86/kvm/paging_tmpl.h86
1 files changed, 40 insertions, 46 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 92994100638b..15610285ebb6 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -497,6 +497,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
shadow_walk_next(&it)) {
gfn_t table_gfn;
+ clear_sp_write_flooding_count(it.sptep);
drop_large_spte(vcpu, it.sptep);
sp = NULL;
@@ -522,6 +523,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
shadow_walk_next(&it)) {
gfn_t direct_gfn;
+ clear_sp_write_flooding_count(it.sptep);
validate_direct_spte(vcpu, it.sptep, direct_access);
drop_large_spte(vcpu, it.sptep);
@@ -536,6 +538,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
link_shadow_page(it.sptep, sp);
}
+ clear_sp_write_flooding_count(it.sptep);
mmu_set_spte(vcpu, it.sptep, access, gw->pte_access,
user_fault, write_fault, emulate, it.level,
gw->gfn, pfn, prefault, map_writable);
@@ -599,11 +602,9 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
*/
if (!r) {
pgprintk("%s: guest page fault\n", __func__);
- if (!prefault) {
+ if (!prefault)
inject_page_fault(vcpu, &walker.fault);
- /* reset fork detector */
- vcpu->arch.last_pt_write_count = 0;
- }
+
return 0;
}
@@ -631,7 +632,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
if (mmu_notifier_retry(vcpu, mmu_seq))
goto out_unlock;
- trace_kvm_mmu_audit(vcpu, AUDIT_PRE_PAGE_FAULT);
+ kvm_mmu_audit(vcpu, AUDIT_PRE_PAGE_FAULT);
kvm_mmu_free_some_pages(vcpu);
if (!force_pt_level)
transparent_hugepage_adjust(vcpu, &walker.gfn, &pfn, &level);
@@ -641,11 +642,8 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
pgprintk("%s: shadow pte %p %llx emulate %d\n", __func__,
sptep, *sptep, emulate);
- if (!emulate)
- vcpu->arch.last_pt_write_count = 0; /* reset fork detector */
-
++vcpu->stat.pf_fixed;
- trace_kvm_mmu_audit(vcpu, AUDIT_POST_PAGE_FAULT);
+ kvm_mmu_audit(vcpu, AUDIT_POST_PAGE_FAULT);
spin_unlock(&vcpu->kvm->mmu_lock);
return emulate;
@@ -656,65 +654,66 @@ out_unlock:
return 0;
}
+static gpa_t FNAME(get_level1_sp_gpa)(struct kvm_mmu_page *sp)
+{
+ int offset = 0;
+
+ WARN_ON(sp->role.level != 1);
+
+ if (PTTYPE == 32)
+ offset = sp->role.quadrant << PT64_LEVEL_BITS;
+
+ return gfn_to_gpa(sp->gfn) + offset * sizeof(pt_element_t);
+}
+
static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva)
{
struct kvm_shadow_walk_iterator iterator;
struct kvm_mmu_page *sp;
- gpa_t pte_gpa = -1;
int level;
u64 *sptep;
- int need_flush = 0;
vcpu_clear_mmio_info(vcpu, gva);
- spin_lock(&vcpu->kvm->mmu_lock);
+ /*
+ * No need to check return value here, rmap_can_add() can
+ * help us to skip pte prefetch later.
+ */
+ mmu_topup_memory_caches(vcpu);
+ spin_lock(&vcpu->kvm->mmu_lock);
for_each_shadow_entry(vcpu, gva, iterator) {
level = iterator.level;
sptep = iterator.sptep;
sp = page_header(__pa(sptep));
if (is_last_spte(*sptep, level)) {
- int offset, shift;
+ pt_element_t gpte;
+ gpa_t pte_gpa;
if (!sp->unsync)
break;
- shift = PAGE_SHIFT -
- (PT_LEVEL_BITS - PT64_LEVEL_BITS) * level;
- offset = sp->role.quadrant << shift;
-
- pte_gpa = (sp->gfn << PAGE_SHIFT) + offset;
+ pte_gpa = FNAME(get_level1_sp_gpa)(sp);
pte_gpa += (sptep - sp->spt) * sizeof(pt_element_t);
- if (is_shadow_present_pte(*sptep)) {
- if (is_large_pte(*sptep))
- --vcpu->kvm->stat.lpages;
- drop_spte(vcpu->kvm, sptep);
- need_flush = 1;
- } else if (is_mmio_spte(*sptep))
- mmu_spte_clear_no_track(sptep);
+ if (mmu_page_zap_pte(vcpu->kvm, sp, sptep))
+ kvm_flush_remote_tlbs(vcpu->kvm);
- break;
+ if (!rmap_can_add(vcpu))
+ break;
+
+ if (kvm_read_guest_atomic(vcpu->kvm, pte_gpa, &gpte,
+ sizeof(pt_element_t)))
+ break;
+
+ FNAME(update_pte)(vcpu, sp, sptep, &gpte);
}
if (!is_shadow_present_pte(*sptep) || !sp->unsync_children)
break;
}
-
- if (need_flush)
- kvm_flush_remote_tlbs(vcpu->kvm);
-
- atomic_inc(&vcpu->kvm->arch.invlpg_counter);
-
spin_unlock(&vcpu->kvm->mmu_lock);
-
- if (pte_gpa == -1)
- return;
-
- if (mmu_topup_memory_caches(vcpu))
- return;
- kvm_mmu_pte_write(vcpu, pte_gpa, NULL, sizeof(pt_element_t), 0);
}
static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
@@ -769,19 +768,14 @@ static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
*/
static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
{
- int i, offset, nr_present;
+ int i, nr_present = 0;
bool host_writable;
gpa_t first_pte_gpa;
- offset = nr_present = 0;
-
/* direct kvm_mmu_page can not be unsync. */
BUG_ON(sp->role.direct);
- if (PTTYPE == 32)
- offset = sp->role.quadrant << PT64_LEVEL_BITS;
-
- first_pte_gpa = gfn_to_gpa(sp->gfn) + offset * sizeof(pt_element_t);
+ first_pte_gpa = FNAME(get_level1_sp_gpa)(sp);
for (i = 0; i < PT64_ENT_PER_PAGE; i++) {
unsigned pte_access;