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| author |   Radim Krčmář <rkrcmar@redhat.com> | 2014-10-30 15:06:47 +0100 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2014-11-03 12:07:32 +0100 |
| commit | f30ebc312ca9def25650b4e1d01cdb425c310dca (patch) | |
| tree | bc3bda35500fdd10e6d2dced919633fde0c322c3 /arch/x86/kvm | |
| parent | KVM: x86: detect LVTT changes under APICv (diff) | |
| download | linux-dev-f30ebc312ca9def25650b4e1d01cdb425c310dca.tar.xz linux-dev-f30ebc312ca9def25650b4e1d01cdb425c310dca.zip | |
KVM: x86: optimize some accesses to LVTT and SPIV
We mirror a subset of these registers in separate variables.
Using them directly should be faster.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 10 | ||||
| -rw-r--r-- | arch/x86/kvm/lapic.h | 6 |
2 files changed, 6 insertions, 10 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index fa3c6f7fdca4..5f574b4add90 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -244,21 +244,17 @@ static inline int apic_lvt_vector(struct kvm_lapic *apic, int lvt_type) static inline int apic_lvtt_oneshot(struct kvm_lapic *apic) { - return ((kvm_apic_get_reg(apic, APIC_LVTT) & - apic->lapic_timer.timer_mode_mask) == APIC_LVT_TIMER_ONESHOT); + return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_ONESHOT; } static inline int apic_lvtt_period(struct kvm_lapic *apic) { - return ((kvm_apic_get_reg(apic, APIC_LVTT) & - apic->lapic_timer.timer_mode_mask) == APIC_LVT_TIMER_PERIODIC); + return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_PERIODIC; } static inline int apic_lvtt_tscdeadline(struct kvm_lapic *apic) { - return ((kvm_apic_get_reg(apic, APIC_LVTT) & - apic->lapic_timer.timer_mode_mask) == - APIC_LVT_TIMER_TSCDEADLINE); + return apic->lapic_timer.timer_mode == APIC_LVT_TIMER_TSCDEADLINE; } static inline int apic_lvt_nmi_mode(u32 lvt_val) diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h index 35d83dcae8f9..d4365f21ea2e 100644 --- a/arch/x86/kvm/lapic.h +++ b/arch/x86/kvm/lapic.h @@ -121,11 +121,11 @@ static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic) extern struct static_key_deferred apic_sw_disabled; -static inline int kvm_apic_sw_enabled(struct kvm_lapic *apic) +static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic) { if (static_key_false(&apic_sw_disabled.key)) - return kvm_apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED; - return APIC_SPIV_APIC_ENABLED; + return apic->sw_enabled; + return true; } static inline bool kvm_apic_present(struct kvm_vcpu *vcpu) |