mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2024-09-19 21:41:07 +00:00
129 lines
4.1 KiB
Rust
129 lines
4.1 KiB
Rust
// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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pub mod kvm {
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use crate::aarch64::gic::kvm::KvmGICDevice;
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use crate::aarch64::gic::{Error, GICDevice};
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use crate::layout;
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use hypervisor::kvm::kvm_bindings;
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use std::sync::Arc;
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use std::{boxed::Box, result};
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type Result<T> = result::Result<T, Error>;
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pub struct KvmGICv3 {
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/// The hypervisor agnostic device
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device: Arc<dyn hypervisor::Device>,
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/// GIC device properties, to be used for setting up the fdt entry
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properties: [u64; 4],
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/// Number of CPUs handled by the device
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vcpu_count: u64,
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}
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impl KvmGICv3 {
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// Unfortunately bindgen omits defines that are based on other defines.
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// See arch/arm64/include/uapi/asm/kvm.h file from the linux kernel.
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pub const SZ_64K: u64 = 0x0001_0000;
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const KVM_VGIC_V3_DIST_SIZE: u64 = KvmGICv3::SZ_64K;
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const KVM_VGIC_V3_REDIST_SIZE: u64 = (2 * KvmGICv3::SZ_64K);
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// Device trees specific constants
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pub const ARCH_GIC_V3_MAINT_IRQ: u32 = 9;
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/// Get the address of the GIC distributor.
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pub fn get_dist_addr() -> u64 {
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layout::MAPPED_IO_START - KvmGICv3::KVM_VGIC_V3_DIST_SIZE
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}
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/// Get the size of the GIC distributor.
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pub fn get_dist_size() -> u64 {
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KvmGICv3::KVM_VGIC_V3_DIST_SIZE
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}
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/// Get the address of the GIC redistributors.
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pub fn get_redists_addr(vcpu_count: u64) -> u64 {
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KvmGICv3::get_dist_addr() - KvmGICv3::get_redists_size(vcpu_count)
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}
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/// Get the size of the GIC redistributors.
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pub fn get_redists_size(vcpu_count: u64) -> u64 {
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vcpu_count * KvmGICv3::KVM_VGIC_V3_REDIST_SIZE
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}
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}
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impl GICDevice for KvmGICv3 {
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fn device(&self) -> &Arc<dyn hypervisor::Device> {
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&self.device
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}
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fn fdt_compatibility(&self) -> &str {
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"arm,gic-v3"
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}
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fn fdt_maint_irq(&self) -> u32 {
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KvmGICv3::ARCH_GIC_V3_MAINT_IRQ
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}
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fn device_properties(&self) -> &[u64] {
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&self.properties
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}
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fn vcpu_count(&self) -> u64 {
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self.vcpu_count
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}
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}
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impl KvmGICDevice for KvmGICv3 {
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fn version() -> u32 {
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kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V3
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}
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fn create_device(
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device: Arc<dyn hypervisor::Device>,
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vcpu_count: u64,
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) -> Box<dyn GICDevice> {
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Box::new(KvmGICv3 {
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device: device,
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properties: [
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KvmGICv3::get_dist_addr(),
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KvmGICv3::get_dist_size(),
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KvmGICv3::get_redists_addr(vcpu_count),
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KvmGICv3::get_redists_size(vcpu_count),
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],
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vcpu_count: vcpu_count,
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})
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}
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fn init_device_attributes(
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_vm: &Arc<dyn hypervisor::Vm>,
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gic_device: &Box<dyn GICDevice>,
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) -> Result<()> {
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/* Setting up the distributor attribute.
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We are placing the GIC below 1GB so we need to substract the size of the distributor.
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*/
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Self::set_device_attribute(
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gic_device.device(),
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kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
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u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_DIST),
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&KvmGICv3::get_dist_addr() as *const u64 as u64,
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0,
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)?;
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/* Setting up the redistributors' attribute.
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We are calculating here the start of the redistributors address. We have one per CPU.
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*/
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Self::set_device_attribute(
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gic_device.device(),
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kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
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u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_REDIST),
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&KvmGICv3::get_redists_addr(u64::from(gic_device.vcpu_count())) as *const u64
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as u64,
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0,
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)?;
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Ok(())
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}
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}
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}
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