Introduce interfaces to make VPEs valid, and to configure them, via the host's IRS. As with the other valid bits in the GICv5 VM tables, VPEs cannot be made valid directly, and instead are made valid via an IRS MMIO Op. Additionally, some of the VPE configuration takes place via the IRS MMIO interface too (via the IRS_VPE_CR0, IRS_VPE_DBR). VPE doorbells are, for example, configured via this interface. The existing VPE-doorbell-based commands are extended with: VPE_MAKE_VALID - Make the VPE valid in the VPET Note: There is no VPE_MAKE_INVALID as VPEs are only made invalid on teardown, at which point the whole VMTE is marked as invalid. Hence, it is not required. Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com> Link: https://patch.msgid.link/20260904113404.4051341-14-sascha.bischoff@arm.com Signed-off-by: Marc Zyngier <maz@kernel.org>