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| author | Yang Zhang <yang.z.zhang@Intel.com> | 2013-01-25 03:18:50 +0100 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-01-29 09:48:06 +0100 |
| commit | 8d14695f9542e9e0195d6e41ddaa52c32322adf5 (patch) | |
| tree | 30d723f19e2c13881f073280d6a3476549d15f83 /arch/x86/kvm/svm.c | |
| parent | x86, apicv: add APICv register virtualization support (diff) | |
| download | linux-8d14695f9542e9e0195d6e41ddaa52c32322adf5.tar.xz linux-8d14695f9542e9e0195d6e41ddaa52c32322adf5.zip | |
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 <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>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d29d3cd1c156..38407e9fd1bd 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -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, |