[PATCH] KVM: MMU: Remove invlpg interception

Since we write protect shadowed guest page tables, there is no need to trap
page invalidations (the guest will always change the mapping before issuing
the invlpg instruction).

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 13 deletions

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 2a1c37eed711..59178ad4d344 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1059,7 +1059,6 @@ static int vmx_vcpu_setup(struct kvm_vcpu *vcpu)
                                | CPU_BASED_CR8_LOAD_EXITING    /* 20.6.2 */
                                | CPU_BASED_CR8_STORE_EXITING   /* 20.6.2 */
                                | CPU_BASED_UNCOND_IO_EXITING   /* 20.6.2 */
-                               | CPU_BASED_INVDPG_EXITING
                                | CPU_BASED_MOV_DR_EXITING
                                | CPU_BASED_USE_TSC_OFFSETING   /* 21.3 */
                         );
@@ -1438,17 +1437,6 @@ static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
         return 0;
 }
 
-static int handle_invlpg(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
-        u64 address = vmcs_read64(EXIT_QUALIFICATION);
-        int instruction_length = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
-        spin_lock(&vcpu->kvm->lock);
-        vcpu->mmu.inval_page(vcpu, address);
-        spin_unlock(&vcpu->kvm->lock);
-        vmcs_writel(GUEST_RIP, vmcs_readl(GUEST_RIP) + instruction_length);
-        return 1;
-}
-
 static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
         u64 exit_qualification;
@@ -1636,7 +1624,6 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu,
         [EXIT_REASON_EXCEPTION_NMI]           = handle_exception,
         [EXIT_REASON_EXTERNAL_INTERRUPT]      = handle_external_interrupt,
         [EXIT_REASON_IO_INSTRUCTION]          = handle_io,
-        [EXIT_REASON_INVLPG]                  = handle_invlpg,
         [EXIT_REASON_CR_ACCESS]               = handle_cr,
         [EXIT_REASON_DR_ACCESS]               = handle_dr,
         [EXIT_REASON_CPUID]                   = handle_cpuid,