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This region must be 64KByte-aligned, and covers a total range of 128KBytes. Signed-off-by: Sascha Bischoff --- .../virt/kvm/devices/arm-vgic-v5.rst | 24 +++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/Documentation/virt/kvm/devices/arm-vgic-v5.rst b/Documentation= /virt/kvm/devices/arm-vgic-v5.rst index 1985b2d880322..2417eba01830c 100644 --- a/Documentation/virt/kvm/devices/arm-vgic-v5.rst +++ b/Documentation/virt/kvm/devices/arm-vgic-v5.rst @@ -12,12 +12,28 @@ Only one VGIC instance may be instantiated through this= API. The created VGIC will act as the VM interrupt controller, requiring emulated user-space dev= ices to inject interrupts to the VGIC instead of directly to CPUs. =20 -Creating a guest GICv5 device requires a GICv5 host. The current VGICv5 d= evice -only supports PPI interrupts. These can either be injected from emulated -in-kernel devices (such as the Arch Timer, or PMU), or via the KVM_IRQ_LIN= E -ioctl. +Creating a guest GICv5 device requires a GICv5 host. The VGICv5 device su= pports +PPI, SPI, and LPI interrupts. The PPI and SPI interrupts can either be in= jected +from emulated in-kernel devices (such as the Arch Timer, or PMU), or via t= he +KVM_IRQ_LINE ioctl. LPIs are not externally injected, but are handled in +hardware via the LPI IST. Their pending state is driven directly by the g= uest. =20 Groups: + KVM_DEV_ARM_VGIC_GRP_ADDR + Attributes: + + KVM_VGIC_V5_ADDR_TYPE_IRS (rw, 64-bit) + Base address in the guest physical address space of the GICv5 IRS + (Interrupt Routing Service) register mappings. Only valid for + KVM_DEV_TYPE_ARM_VGIC_V5. This address needs to be 64K aligned and = the + region covers 128 KByte - the IRS has a CONFIG_FRAME and a SETLPI_FR= AME, + each of which is 64kByte in sized. + + Setting the address of the IRS in GPA space is mandatory for initial= ising + a virtual GICv5 as the IRs is responsible for handling SPIs and + LPIs. Failure to set the IRS address prior to initialising the GIC r= esults + in an error. + KVM_DEV_ARM_VGIC_GRP_CTRL Attributes: =20 --=20 2.34.1