use kvm_ioctls::DeviceFd;
use super::{GICDevice, Result};
pub struct GICv2 {
fd: DeviceFd,
properties: [u64; 4],
vcpu_count: u64,
}
impl GICv2 {
const KVM_VGIC_V2_DIST_SIZE: u64 = 0x1000;
const KVM_VGIC_V2_CPU_SIZE: u64 = 0x2000;
const ARCH_GIC_V2_MAINT_IRQ: u32 = 8;
const fn get_dist_addr() -> u64 {
crate::aarch64::gic::GIC_REG_END_ADDRESS - GICv2::KVM_VGIC_V2_DIST_SIZE
}
const fn get_dist_size() -> u64 {
GICv2::KVM_VGIC_V2_DIST_SIZE
}
const fn get_cpu_addr() -> u64 {
GICv2::get_dist_addr() - GICv2::KVM_VGIC_V2_CPU_SIZE
}
const fn get_cpu_size() -> u64 {
GICv2::KVM_VGIC_V2_CPU_SIZE
}
}
impl GICDevice for GICv2 {
fn device_fd(&self) -> &DeviceFd {
&self.fd
}
fn device_properties(&self) -> &[u64] {
&self.properties
}
fn vcpu_count(&self) -> u64 {
self.vcpu_count
}
fn fdt_compatibility(&self) -> &str {
"arm,gic-400"
}
fn fdt_maint_irq(&self) -> u32 {
GICv2::ARCH_GIC_V2_MAINT_IRQ
}
fn version() -> u32 {
kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V2
}
fn create_device(fd: DeviceFd, vcpu_count: u64) -> Box<dyn GICDevice> {
Box::new(GICv2 {
fd,
properties: [
GICv2::get_dist_addr(),
GICv2::get_dist_size(),
GICv2::get_cpu_addr(),
GICv2::get_cpu_size(),
],
vcpu_count,
})
}
fn init_device_attributes(gic_device: &dyn GICDevice) -> Result<()> {
Self::set_device_attribute(
gic_device.device_fd(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_V2_ADDR_TYPE_DIST),
&GICv2::get_dist_addr() as *const u64 as u64,
0,
)?;
Self::set_device_attribute(
gic_device.device_fd(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_V2_ADDR_TYPE_CPU),
&GICv2::get_cpu_addr() as *const u64 as u64,
0,
)?;
Ok(())
}
}