From 8d14695f9542e9e0195d6e41ddaa52c32322adf5 Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 25 Jan 2013 10:18:50 +0800 Subject: x86, apicv: add virtual x2apic support 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 Signed-off-by: Kevin Tian Signed-off-by: Yang Zhang Signed-off-by: Gleb Natapov --- arch/x86/kvm/lapic.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/x86/kvm/lapic.h') diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h index 9a8ee22bc7a3..22a5397b638c 100644 --- a/arch/x86/kvm/lapic.h +++ b/arch/x86/kvm/lapic.h @@ -126,4 +126,9 @@ static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu) return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic); } +static inline int apic_x2apic_mode(struct kvm_lapic *apic) +{ + return apic->vcpu->arch.apic_base & X2APIC_ENABLE; +} + #endif -- cgit