aboutsummaryrefslogtreecommitdiff
path: root/virt/kvm/arm/vgic.c
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm/arm/vgic.c')
-rw-r--r--virt/kvm/arm/vgic.c70
1 files changed, 66 insertions, 4 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index d08ba28e729a..e59aaa4c64e5 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -663,18 +663,80 @@ static void vgic_unqueue_irqs(struct kvm_vcpu *vcpu)
}
}
-static bool handle_mmio_sgi_clear(struct kvm_vcpu *vcpu,
- struct kvm_exit_mmio *mmio,
- phys_addr_t offset)
+/* Handle reads of GICD_CPENDSGIRn and GICD_SPENDSGIRn */
+static bool read_set_clear_sgi_pend_reg(struct kvm_vcpu *vcpu,
+ struct kvm_exit_mmio *mmio,
+ phys_addr_t offset)
{
+ struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
+ int sgi;
+ int min_sgi = (offset & ~0x3) * 4;
+ int max_sgi = min_sgi + 3;
+ int vcpu_id = vcpu->vcpu_id;
+ u32 reg = 0;
+
+ /* Copy source SGIs from distributor side */
+ for (sgi = min_sgi; sgi <= max_sgi; sgi++) {
+ int shift = 8 * (sgi - min_sgi);
+ reg |= (u32)dist->irq_sgi_sources[vcpu_id][sgi] << shift;
+ }
+
+ mmio_data_write(mmio, ~0, reg);
return false;
}
+static bool write_set_clear_sgi_pend_reg(struct kvm_vcpu *vcpu,
+ struct kvm_exit_mmio *mmio,
+ phys_addr_t offset, bool set)
+{
+ struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
+ int sgi;
+ int min_sgi = (offset & ~0x3) * 4;
+ int max_sgi = min_sgi + 3;
+ int vcpu_id = vcpu->vcpu_id;
+ u32 reg;
+ bool updated = false;
+
+ reg = mmio_data_read(mmio, ~0);
+
+ /* Clear pending SGIs on the distributor */
+ for (sgi = min_sgi; sgi <= max_sgi; sgi++) {
+ u8 mask = reg >> (8 * (sgi - min_sgi));
+ if (set) {
+ if ((dist->irq_sgi_sources[vcpu_id][sgi] & mask) != mask)
+ updated = true;
+ dist->irq_sgi_sources[vcpu_id][sgi] |= mask;
+ } else {
+ if (dist->irq_sgi_sources[vcpu_id][sgi] & mask)
+ updated = true;
+ dist->irq_sgi_sources[vcpu_id][sgi] &= ~mask;
+ }
+ }
+
+ if (updated)
+ vgic_update_state(vcpu->kvm);
+
+ return updated;
+}
+
static bool handle_mmio_sgi_set(struct kvm_vcpu *vcpu,
struct kvm_exit_mmio *mmio,
phys_addr_t offset)
{
- return false;
+ if (!mmio->is_write)
+ return read_set_clear_sgi_pend_reg(vcpu, mmio, offset);
+ else
+ return write_set_clear_sgi_pend_reg(vcpu, mmio, offset, true);
+}
+
+static bool handle_mmio_sgi_clear(struct kvm_vcpu *vcpu,
+ struct kvm_exit_mmio *mmio,
+ phys_addr_t offset)
+{
+ if (!mmio->is_write)
+ return read_set_clear_sgi_pend_reg(vcpu, mmio, offset);
+ else
+ return write_set_clear_sgi_pend_reg(vcpu, mmio, offset, false);
}
/*