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| author |   Andre Przywara <andre.przywara@arm.com> | 2016-07-15 12:43:34 +0100 |
|---|---|---|
| committer |   Marc Zyngier <marc.zyngier@arm.com> | 2016-07-18 18:14:37 +0100 |
| commit | 33d3bc9556a7dda5bba2cb6b2d08ae4841ae423e (patch) | |
| tree | 5d006445d90840429e51c930e94689d521a4d228 /virt/kvm/arm/vgic/vgic.h | |
| parent | KVM: arm64: vgic-its: Connect LPIs to the VGIC emulation (diff) | |
| download | linux-dev-33d3bc9556a7dda5bba2cb6b2d08ae4841ae423e.tar.xz linux-dev-33d3bc9556a7dda5bba2cb6b2d08ae4841ae423e.zip | |
KVM: arm64: vgic-its: Read initial LPI pending table
The LPI pending status for a GICv3 redistributor is held in a table
in (guest) memory. To achieve reasonable performance, we cache the
pending bit in our struct vgic_irq. The initial pending state must be
read from guest memory upon enabling LPIs for this redistributor.
As we can't access the guest memory while we hold the lpi_list spinlock,
we create a snapshot of the LPI list and iterate over that.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic.h')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h index 8192a293f119..ee348deb8737 100644 --- a/virt/kvm/arm/vgic/vgic.h +++ b/virt/kvm/arm/vgic/vgic.h @@ -25,6 +25,7 @@ #define IS_VGIC_ADDR_UNDEF(_x) ((_x) == VGIC_ADDR_UNDEF) #define INTERRUPT_ID_BITS_SPIS 10 +#define INTERRUPT_ID_BITS_ITS 16 #define VGIC_PRI_BITS 5 #define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS) @@ -76,6 +77,7 @@ int vgic_v3_probe(const struct gic_kvm_info *info); int vgic_v3_map_resources(struct kvm *kvm); int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t dist_base_address); bool vgic_has_its(struct kvm *kvm); +void vgic_enable_lpis(struct kvm_vcpu *vcpu); #else static inline void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu) { @@ -133,6 +135,9 @@ static inline bool vgic_has_its(struct kvm *kvm) return false; } +static inline void vgic_enable_lpis(struct kvm_vcpu *vcpu) +{ +} #endif int kvm_register_vgic_device(unsigned long type); |