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| author | Christoffer Dall <christoffer.dall@linaro.org> | 2016-12-22 20:39:10 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 10:53:20 +0000 |
| commit | 75174ba6ca9dcfddda88aa420da4d7aa2b279fdf (patch) | |
| tree | c5d1dc7a6af9db67e6fb8fdd36dfce9ddb9844ee /virt/kvm/arm/vgic/vgic.c | |
| parent | bb5ed7035918d265189e2623d71c8f458713d3e9 (diff) | |
| download | linux-75174ba6ca9dcfddda88aa420da4d7aa2b279fdf.tar.bz2 | |
KVM: arm/arm64: Handle VGICv2 save/restore from the main VGIC code
We can program the GICv2 hypervisor control interface logic directly
from the core vgic code and can instead do the save/restore directly
from the flush/sync functions, which can lead to a number of future
optimizations.
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic.c')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index c7c5ef190afa..12e2a28f437e 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -749,11 +749,19 @@ next: vgic_clear_lr(vcpu, count); } +static inline void vgic_save_state(struct kvm_vcpu *vcpu) +{ + if (!static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif)) + vgic_v2_save_state(vcpu); +} + /* Sync back the hardware VGIC state into our emulation after a guest's run. */ void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) { struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; + vgic_save_state(vcpu); + WARN_ON(vgic_v4_sync_hwstate(vcpu)); /* An empty ap_list_head implies used_lrs == 0 */ @@ -765,6 +773,12 @@ void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) vgic_prune_ap_list(vcpu); } +static inline void vgic_restore_state(struct kvm_vcpu *vcpu) +{ + if (!static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif)) + vgic_v2_restore_state(vcpu); +} + /* Flush our emulation state into the GIC hardware before entering the guest. */ void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) { @@ -780,13 +794,16 @@ void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) * this. */ if (list_empty(&vcpu->arch.vgic_cpu.ap_list_head)) - return; + goto out; DEBUG_SPINLOCK_BUG_ON(!irqs_disabled()); spin_lock(&vcpu->arch.vgic_cpu.ap_list_lock); vgic_flush_lr_state(vcpu); spin_unlock(&vcpu->arch.vgic_cpu.ap_list_lock); + +out: + vgic_restore_state(vcpu); } void kvm_vgic_load(struct kvm_vcpu *vcpu) |