Merge tag 'kvmarm-6.17' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 changes for 6.17, round #1

 - Host driver for GICv5, the next generation interrupt controller for
   arm64, including support for interrupt routing, MSIs, interrupt
   translation and wired interrupts.

 - Use FEAT_GCIE_LEGACY on GICv5 systems to virtualize GICv3 VMs on
   GICv5 hardware, leveraging the legacy VGIC interface.

 - Userspace control of the 'nASSGIcap' GICv3 feature, allowing
   userspace to disable support for SGIs w/o an active state on hardware
   that previously advertised it unconditionally.

 - Map supporting endpoints with cacheable memory attributes on systems
   with FEAT_S2FWB and DIC where KVM no longer needs to perform cache
   maintenance on the address range.

 - Nested support for FEAT_RAS and FEAT_DoubleFault2, allowing the guest
   hypervisor to inject external aborts into an L2 VM and take traps of
   masked external aborts to the hypervisor.

 - Convert more system register sanitization to the config-driven
   implementation.

 - Fixes to the visibility of EL2 registers, namely making VGICv3 system
   registers accessible through the VGIC device instead of the ONE_REG
   vCPU ioctls.

 - Various cleanups and minor fixes.

include/kvm/arm_vgic.h

@@ -38,6 +38,7 @@
 enum vgic_type {
 	VGIC_V2,		/* Good ol' GICv2 */
 	VGIC_V3,		/* New fancy GICv3 */
+	VGIC_V5,		/* Newer, fancier GICv5 */
 };
 
 /* same for all guests, as depending only on the _host's_ GIC model */
@@ -77,9 +78,12 @@ struct vgic_global {
 	/* Pseudo GICv3 from outer space */
 	bool			no_hw_deactivation;
 
-	/* GIC system register CPU interface */
+	/* GICv3 system register CPU interface */
 	struct static_key_false gicv3_cpuif;
 
+	/* GICv3 compat mode on a GICv5 host */
+	bool			has_gcie_v3_compat;
+
 	u32			ich_vtr_el2;
 };
 
@@ -264,6 +268,9 @@ struct vgic_dist {
 	/* distributor enabled */
 	bool			enabled;
 
+	/* Supports SGIs without active state */
+	bool			nassgicap;
+
 	/* Wants SGIs without active state */
 	bool			nassgireq;