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x86, apicv: add virtual x2apic support

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basically to benefit from apicv, we need to enable virtualized x2apic mode.
Currently, we only enable it when guest is really using x2apic.

Also, clear MSR bitmap for corresponding x2apic MSRs when guest enabled x2apic:
0x800 - 0x8ff: no read intercept for apicv register virtualization,
               except APIC ID and TMCCT which need software's assistance to
               get right value.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Yang Zhang
2013-01-25 10:18:50 +08:00
committed by Gleb Natapov
parent 83d4c28693
commit 8d14695f95
6 changed files with 201 additions and 29 deletions
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6
arch/x86/kvm/svm.c
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@@ -3571,6 +3571,11 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
}
static void svm_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
{
return;
}
static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
@@ -4290,6 +4295,7 @@ static struct kvm_x86_ops svm_x86_ops = {
.enable_nmi_window = enable_nmi_window,
.enable_irq_window = enable_irq_window,
.update_cr8_intercept = update_cr8_intercept,
.set_virtual_x2apic_mode = svm_set_virtual_x2apic_mode,
.set_tss_addr = svm_set_tss_addr,
.get_tdp_level = get_npt_level,