xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86, apicv: add virtual x2apic support

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kvm/lapic.h
View File

@@ -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