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authorMarc Zyngier <maz@kernel.org>2020-03-04 23:33:28 +0300
committerMarc Zyngier <maz@kernel.org>2020-03-24 15:15:51 +0300
commitd9c3872cd2f86b7295446e35b4801270669d2960 (patch)
treed4d6b6c91e5c80683c188f238ac37f0c0aa61cea /virt/kvm/arm/vgic
parent2291ff2f2a569b7b7a64aff3d05e1d51fe0fd66a (diff)
downloadlinux-d9c3872cd2f86b7295446e35b4801270669d2960.tar.xz
KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable
Each time a Group-enable bit gets flipped, the state of these bits needs to be forwarded to the hardware. This is a pretty heavy handed operation, requiring all vcpus to reload their GICv4 configuration. It is thus implemented as a new request type. These enable bits are programmed into the HW by setting the VGrp{0,1}En fields of GICR_VPENDBASER when the vPEs are made resident again. Of course, we only support Group-1 for now... Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Zenghui Yu <yuzenghui@huawei.com> Link: https://lore.kernel.org/r/20200304203330.4967-22-maz@kernel.org
Diffstat (limited to 'virt/kvm/arm/vgic')
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio-v3.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index 905032a03886..e72dcc454247 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -132,7 +132,10 @@ static void vgic_mmio_write_v3_misc(struct kvm_vcpu *vcpu,
if (is_hwsgi != dist->nassgireq)
vgic_v4_configure_vsgis(vcpu->kvm);
- if (!was_enabled && dist->enabled)
+ if (kvm_vgic_global_state.has_gicv4_1 &&
+ was_enabled != dist->enabled)
+ kvm_make_all_cpus_request(vcpu->kvm, KVM_REQ_RELOAD_GICv4);
+ else if (!was_enabled && dist->enabled)
vgic_kick_vcpus(vcpu->kvm);
mutex_unlock(&vcpu->kvm->lock);