diff options
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 2a3c8909b144..54fc61e4b061 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2380,15 +2380,10 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep, if (pte_access & ACC_WRITE_MASK) { /* - * There are two cases: - * - the one is other vcpu creates new sp in the window - * between mapping_level() and acquiring mmu-lock. - * - the another case is the new sp is created by itself - * (page-fault path) when guest uses the target gfn as - * its page table. - * Both of these cases can be fixed by allowing guest to - * retry the access, it will refault, then we can establish - * the mapping by using small page. + * Other vcpu creates new sp in the window between + * mapping_level() and acquiring mmu-lock. We can + * allow guest to retry the access, the mapping can + * be fixed if guest refault. */ if (level > PT_PAGE_TABLE_LEVEL && has_wrprotected_page(vcpu->kvm, gfn, level)) |