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[PATCH] KVM: MMU: Remove invlpg interception

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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>
This commit is contained in:
Avi Kivity
2007-01-05 16:36:47 -08:00
committed by Linus Torvalds
parent ebeace8609
commit 5f015a5b28
5 changed files with 0 additions and 62 deletions
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13
drivers/kvm/vmx.c
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@@ -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,