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| author | Andre Przywara <andre.przywara@arm.com> | 2014-06-03 10:58:15 +0400 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2015-01-20 20:25:28 +0300 |
| commit | 2f5fa41a7a7f47f3109a6596b0ec96258dbf06e6 (patch) | |
| tree | 6e75ee4272712add84e6d0a1f547caaacc38a7d3 /virt/kvm | |
| parent | 3caa2d8c3b2d80f5e342fe8cec07c03c8147dcab (diff) | |
| download | linux-2f5fa41a7a7f47f3109a6596b0ec96258dbf06e6.tar.xz | |
arm/arm64: KVM: make the value of ICC_SRE_EL1 a per-VM variable
ICC_SRE_EL1 is a system register allowing msr/mrs accesses to the
GIC CPU interface for EL1 (guests). Currently we force it to 0, but
for proper GICv3 support we have to allow guests to use it (depending
on their selected virtual GIC model).
So add ICC_SRE_EL1 to the list of saved/restored registers on a
world switch, but actually disallow a guest to change it by only
restoring a fixed, once-initialized value.
This value depends on the GIC model userland has chosen for a guest.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/arm/vgic-v3.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/virt/kvm/arm/vgic-v3.c b/virt/kvm/arm/vgic-v3.c index ea39bad4b004..52490480b6f9 100644 --- a/virt/kvm/arm/vgic-v3.c +++ b/virt/kvm/arm/vgic-v3.c @@ -145,15 +145,19 @@ static void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp) static void vgic_v3_enable(struct kvm_vcpu *vcpu) { + struct vgic_v3_cpu_if *vgic_v3 = &vcpu->arch.vgic_cpu.vgic_v3; + /* * By forcing VMCR to zero, the GIC will restore the binary * points to their reset values. Anything else resets to zero * anyway. */ - vcpu->arch.vgic_cpu.vgic_v3.vgic_vmcr = 0; + vgic_v3->vgic_vmcr = 0; + + vgic_v3->vgic_sre = 0; /* Get the show on the road... */ - vcpu->arch.vgic_cpu.vgic_v3.vgic_hcr = ICH_HCR_EN; + vgic_v3->vgic_hcr = ICH_HCR_EN; } static const struct vgic_ops vgic_v3_ops = { |