KVM: arm64: vgic: Handle ITS related GICv3 redistributor registers

In the GICv3 redistributor there are the PENDBASER and PROPBASER
registers which we did not emulate so far, as they only make sense
when having an ITS. In preparation for that emulate those MMIO
accesses by storing the 64-bit data written into it into a variable
which we later read in the ITS emulation.
We also sanitise the registers, making sure RES0 regions are respected
and checking for valid memory attributes.

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>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 450b4dab9a9f..df2dec5ef620 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -146,6 +146,14 @@ struct vgic_dist {
 	struct vgic_irq		*spis;
 
 	struct vgic_io_device	dist_iodev;
+
+	/*
+	 * Contains the attributes and gpa of the LPI configuration table.
+	 * Since we report GICR_TYPER.CommonLPIAff as 0b00, we can share
+	 * one address across all redistributors.
+	 * GICv3 spec: 6.1.2 "LPI Configuration tables"
+	 */
+	u64			propbaser;
 };
 
 struct vgic_v2_cpu_if {
@@ -200,6 +208,11 @@ struct vgic_cpu {
 	 */
 	struct vgic_io_device	rd_iodev;
 	struct vgic_io_device	sgi_iodev;
+
+	/* Contains the attributes and gpa of the LPI pending tables. */
+	u64 pendbaser;
+
+	bool lpis_enabled;
 };
 
 int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write);