Merge tag 'irqchip-gic-v5-host' into kvmarm/next

GICv5 initial host support

Add host kernel support for the new arm64 GICv5 architecture, which is
quite a departure from the previous ones.

Include support for the full gamut of the architecture (interrupt
routing and delivery to CPUs, wired interrupts, MSIs, and interrupt
translation).

* tag 'irqchip-gic-v5-host': (32 commits)
  arm64: smp: Fix pNMI setup after GICv5 rework
  arm64: Kconfig: Enable GICv5
  docs: arm64: gic-v5: Document booting requirements for GICv5
  irqchip/gic-v5: Add GICv5 IWB support
  irqchip/gic-v5: Add GICv5 ITS support
  irqchip/msi-lib: Add IRQ_DOMAIN_FLAG_FWNODE_PARENT handling
  irqchip/gic-v3: Rename GICv3 ITS MSI parent
  PCI/MSI: Add pci_msi_map_rid_ctlr_node() helper function
  of/irq: Add of_msi_xlate() helper function
  irqchip/gic-v5: Enable GICv5 SMP booting
  irqchip/gic-v5: Add GICv5 LPI/IPI support
  irqchip/gic-v5: Add GICv5 IRS/SPI support
  irqchip/gic-v5: Add GICv5 PPI support
  arm64: Add support for GICv5 GSB barriers
  arm64: smp: Support non-SGIs for IPIs
  arm64: cpucaps: Add GICv5 CPU interface (GCIE) capability
  arm64: cpucaps: Rename GICv3 CPU interface capability
  arm64: Disable GICv5 read/write/instruction traps
  arm64/sysreg: Add ICH_HFGITR_EL2
  arm64/sysreg: Add ICH_HFGWTR_EL2
  ...

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>