KVM: x86/mmu: Remove is_obsolete() call

Unwinding usage of is_obsolete() is a step towards removing x86's fast
invalidate mechanism, i.e. this is one part of a revert all patches from
the series that introduced the mechanism[1].

This is a partial revert of commit 05988d728dcd ("KVM: MMU: reduce
KVM_REQ_MMU_RELOAD when root page is zapped").

[1] https://lkml.kernel.org/r/1369960590-14138-1-git-send-email-xiaoguangrong@linux.vnet.ibm.com

Cc: Xiao Guangrong <guangrong.xiao@gmail.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 2190679..6cbffc7 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2713,11 +2713,7 @@ static int kvm_mmu_prepare_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp,
        } else {
                list_move(&sp->link, &kvm->arch.active_mmu_pages);
 
-               /*
-                * The obsolete pages can not be used on any vcpus.
-                * See the comments in kvm_mmu_invalidate_zap_all_pages().
-                */
-               if (!sp->role.invalid && !is_obsolete_sp(kvm, sp))
+               if (!sp->role.invalid)
                        kvm_reload_remote_mmus(kvm);
        }