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| author |  Marc Zyngier <marc.zyngier@arm.com>
| 2017-06-09 12:49:40 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com>
| 2017-06-15 09:45:01 +0100 |
| commit | 9c7bfc288c71068ab323b802dba2eb87fd08b127 (patch) | |
| tree | 2284e6b5fa39ea9289a929c2f66b89d6d6a08c8c /virt/kvm/arm/vgic/vgic-v3.c | |
| parent | KVM: arm64: vgic-v3: Add ICV_HPPIR1_EL1 handler (diff) | |
| download | linux-9c7bfc288c71068ab323b802dba2eb87fd08b127.tar.gz linux-9c7bfc288c71068ab323b802dba2eb87fd08b127.tar.bz2 linux-9c7bfc288c71068ab323b802dba2eb87fd08b127.zip | |
KVM: arm64: vgic-v3: Enable trapping of Group-1 system registers
In order to be able to trap Group-1 GICv3 system registers, we need to
set ICH_HCR_EL2.TALL1 before entering the guest. This is conditionally
done after having restored the guest's state, and cleared on exit.
Tested-by: Alexander Graf <agraf@suse.de>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-v3.c')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-v3.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index fac6e23cd0b3..722bdebdfbb5 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -21,6 +21,8 @@ #include "vgic.h" +static bool group1_trap; + void vgic_v3_set_underflow(struct kvm_vcpu *vcpu) { struct vgic_v3_cpu_if *cpuif = &vcpu->arch.vgic_cpu.vgic_v3; @@ -258,6 +260,8 @@ void vgic_v3_enable(struct kvm_vcpu *vcpu) /* Get the show on the road... */ vgic_v3->vgic_hcr = ICH_HCR_EN; + if (group1_trap) + vgic_v3->vgic_hcr |= ICH_HCR_TALL1; } int vgic_v3_lpi_sync_pending_status(struct kvm *kvm, struct vgic_irq *irq) |