mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
KVM: x86/mmu: Remove lpage_is_disallowed() check from set_spte()
Remove the late "lpage is disallowed" check from set_spte() now that the initial check is performed after acquiring mmu_lock. Fold the guts of the remaining helper, __mmu_gfn_lpage_is_disallowed(), into kvm_mmu_hugepage_adjust() to eliminate the unnecessary slot !NULL check. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
parent
293e306e7f
commit
2c0629f4b9
1 changed files with 3 additions and 36 deletions
|
@ -1264,28 +1264,6 @@ static void unaccount_huge_nx_page(struct kvm *kvm, struct kvm_mmu_page *sp)
|
|||
list_del(&sp->lpage_disallowed_link);
|
||||
}
|
||||
|
||||
static bool __mmu_gfn_lpage_is_disallowed(gfn_t gfn, int level,
|
||||
struct kvm_memory_slot *slot)
|
||||
{
|
||||
struct kvm_lpage_info *linfo;
|
||||
|
||||
if (slot) {
|
||||
linfo = lpage_info_slot(gfn, slot, level);
|
||||
return !!linfo->disallow_lpage;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool mmu_gfn_lpage_is_disallowed(struct kvm_vcpu *vcpu, gfn_t gfn,
|
||||
int level)
|
||||
{
|
||||
struct kvm_memory_slot *slot;
|
||||
|
||||
slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn);
|
||||
return __mmu_gfn_lpage_is_disallowed(gfn, level, slot);
|
||||
}
|
||||
|
||||
static inline bool memslot_valid_for_gpte(struct kvm_memory_slot *slot,
|
||||
bool no_dirty_log)
|
||||
{
|
||||
|
@ -3078,18 +3056,6 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
|
|||
spte |= (u64)pfn << PAGE_SHIFT;
|
||||
|
||||
if (pte_access & ACC_WRITE_MASK) {
|
||||
|
||||
/*
|
||||
* Legacy code to handle an obsolete scenario where a different
|
||||
* vcpu creates new sp in the window between this vcpu's query
|
||||
* of lpage_is_disallowed() and acquiring mmu_lock. No longer
|
||||
* necessary now that lpage_is_disallowed() is called after
|
||||
* acquiring mmu_lock.
|
||||
*/
|
||||
if (level > PT_PAGE_TABLE_LEVEL &&
|
||||
mmu_gfn_lpage_is_disallowed(vcpu, gfn, level))
|
||||
goto done;
|
||||
|
||||
spte |= PT_WRITABLE_MASK | SPTE_MMU_WRITEABLE;
|
||||
|
||||
/*
|
||||
|
@ -3121,7 +3087,6 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
|
|||
set_pte:
|
||||
if (mmu_spte_update(sptep, spte))
|
||||
ret |= SET_SPTE_NEED_REMOTE_TLB_FLUSH;
|
||||
done:
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
@ -3309,6 +3274,7 @@ static int kvm_mmu_hugepage_adjust(struct kvm_vcpu *vcpu, gfn_t gfn,
|
|||
int max_level, kvm_pfn_t *pfnp)
|
||||
{
|
||||
struct kvm_memory_slot *slot;
|
||||
struct kvm_lpage_info *linfo;
|
||||
kvm_pfn_t pfn = *pfnp;
|
||||
kvm_pfn_t mask;
|
||||
int level;
|
||||
|
@ -3326,7 +3292,8 @@ static int kvm_mmu_hugepage_adjust(struct kvm_vcpu *vcpu, gfn_t gfn,
|
|||
|
||||
max_level = min(max_level, kvm_x86_ops->get_lpage_level());
|
||||
for ( ; max_level > PT_PAGE_TABLE_LEVEL; max_level--) {
|
||||
if (!__mmu_gfn_lpage_is_disallowed(gfn, max_level, slot))
|
||||
linfo = lpage_info_slot(gfn, slot, max_level);
|
||||
if (!linfo->disallow_lpage)
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue