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aarch64: Remove GicDevice trait

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`GicDevice` trait was defined for the common part of GicV3 and ITS.
Now that the standalone GicV3 do not exist, `GicDevice` is not needed.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This commit is contained in:
Michael Zhao 2022-05-24 13:46:24 +08:00 committed by Xin Wang
parent fd581b1afb
commit 3fe20cc09a
4 changed files with 459 additions and 587 deletions
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555
arch/src/aarch64/gic/gicv3_its.rs
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@ -1,555 +0,0 @@
// Copyright 2021 Arm Limited (or its affiliates). All rights reserved.
// SPDX-License-Identifier: Apache-2.0
//
// This file implements the GicV3 device with ITS (Virtual Interrupt Translation Service).
pub mod kvm {
use crate::aarch64::gic::dist_regs::{get_dist_regs, read_ctlr, set_dist_regs, write_ctlr};
use crate::aarch64::gic::icc_regs::{get_icc_regs, set_icc_regs};
use crate::aarch64::gic::redist_regs::{
construct_gicr_typers, get_redist_regs, set_redist_regs,
};
use crate::aarch64::gic::kvm::{save_pending_tables, KvmGicDevice};
use crate::aarch64::gic::GicDevice;
use crate::layout;
use anyhow::anyhow;
use hypervisor::kvm::kvm_bindings;
use hypervisor::CpuState;
use serde::{Deserialize, Serialize};
use std::any::Any;
use std::convert::TryInto;
use std::sync::Arc;
use std::{boxed::Box, result};
use vm_memory::Address;
use vm_migration::{
Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable,
};
const GITS_CTLR: u32 = 0x0000;
const GITS_IIDR: u32 = 0x0004;
const GITS_CBASER: u32 = 0x0080;
const GITS_CWRITER: u32 = 0x0088;
const GITS_CREADR: u32 = 0x0090;
const GITS_BASER: u32 = 0x0100;
/// Errors thrown while saving/restoring the GICv3ITS.
#[derive(Debug)]
pub enum Error {
/// Error in saving RDIST pending tables into guest RAM.
SavePendingTables(crate::aarch64::gic::Error),
/// Error in saving GIC distributor registers.
SaveDistributorRegisters(crate::aarch64::gic::Error),
/// Error in restoring GIC distributor registers.
RestoreDistributorRegisters(crate::aarch64::gic::Error),
/// Error in saving GIC distributor control registers.
SaveDistributorCtrlRegisters(crate::aarch64::gic::Error),
/// Error in restoring GIC distributor control registers.
RestoreDistributorCtrlRegisters(crate::aarch64::gic::Error),
/// Error in saving GIC redistributor registers.
SaveRedistributorRegisters(crate::aarch64::gic::Error),
/// Error in restoring GIC redistributor registers.
RestoreRedistributorRegisters(crate::aarch64::gic::Error),
/// Error in saving GIC CPU interface registers.
SaveIccRegisters(crate::aarch64::gic::Error),
/// Error in restoring GIC CPU interface registers.
RestoreIccRegisters(crate::aarch64::gic::Error),
/// Error in saving GICv3ITS IIDR register.
SaveITSIIDR(crate::aarch64::gic::Error),
/// Error in restoring GICv3ITS IIDR register.
RestoreITSIIDR(crate::aarch64::gic::Error),
/// Error in saving GICv3ITS CBASER register.
SaveITSCBASER(crate::aarch64::gic::Error),
/// Error in restoring GICv3ITS CBASER register.
RestoreITSCBASER(crate::aarch64::gic::Error),
/// Error in saving GICv3ITS CREADR register.
SaveITSCREADR(crate::aarch64::gic::Error),
/// Error in restoring GICv3ITS CREADR register.
RestoreITSCREADR(crate::aarch64::gic::Error),
/// Error in saving GICv3ITS CWRITER register.
SaveITSCWRITER(crate::aarch64::gic::Error),
/// Error in restoring GICv3ITS CWRITER register.
RestoreITSCWRITER(crate::aarch64::gic::Error),
/// Error in saving GICv3ITS BASER register.
SaveITSBASER(crate::aarch64::gic::Error),
/// Error in restoring GICv3ITS BASER register.
RestoreITSBASER(crate::aarch64::gic::Error),
/// Error in saving GICv3ITS CTLR register.
SaveITSCTLR(crate::aarch64::gic::Error),
/// Error in restoring GICv3ITS CTLR register.
RestoreITSCTLR(crate::aarch64::gic::Error),
/// Error in saving GICv3ITS restore tables.
SaveITSTables(crate::aarch64::gic::Error),
/// Error in restoring GICv3ITS restore tables.
RestoreITSTables(crate::aarch64::gic::Error),
}
type Result<T> = result::Result<T, Error>;
/// Access an ITS device attribute.
///
/// This is a helper function to get/set the ITS device attribute depending
/// the bool parameter `set` provided.
pub fn gicv3_its_attr_access(
its_device: &Arc<dyn hypervisor::Device>,
group: u32,
attr: u32,
val: &u64,
set: bool,
) -> crate::aarch64::gic::Result<()> {
let mut gicv3_its_attr = kvm_bindings::kvm_device_attr {
group,
attr: attr as u64,
addr: val as *const u64 as u64,
flags: 0,
};
if set {
its_device
.set_device_attr(&gicv3_its_attr)
.map_err(crate::aarch64::gic::Error::SetDeviceAttribute)?;
} else {
its_device
.get_device_attr(&mut gicv3_its_attr)
.map_err(crate::aarch64::gic::Error::GetDeviceAttribute)?;
}
Ok(())
}
/// Function that saves/restores ITS tables into guest RAM.
///
/// The tables get flushed to guest RAM whenever the VM gets stopped.
pub fn gicv3_its_tables_access(
its_device: &Arc<dyn hypervisor::Device>,
save: bool,
) -> crate::aarch64::gic::Result<()> {
let attr = if save {
u64::from(kvm_bindings::KVM_DEV_ARM_ITS_SAVE_TABLES)
} else {
u64::from(kvm_bindings::KVM_DEV_ARM_ITS_RESTORE_TABLES)
};
let init_gic_attr = kvm_bindings::kvm_device_attr {
group: kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
attr,
addr: 0,
flags: 0,
};
its_device
.set_device_attr(&init_gic_attr)
.map_err(crate::aarch64::gic::Error::SetDeviceAttribute)
}
pub struct KvmGicV3Its {
/// The hypervisor agnostic device for the GicV3
device: Arc<dyn hypervisor::Device>,
/// The hypervisor agnostic device for the Its device
its_device: Option<Arc<dyn hypervisor::Device>>,
/// Vector holding values of GICR_TYPER for each vCPU
gicr_typers: Vec<u64>,
/// GIC device properties, to be used for setting up the fdt entry
gic_properties: [u64; 4],
/// MSI device properties, to be used for setting up the fdt entry
msi_properties: [u64; 2],
/// Number of CPUs handled by the device
vcpu_count: u64,
}
#[derive(Clone, Default, Serialize, Deserialize)]
pub struct Gicv3ItsState {
dist: Vec<u32>,
rdist: Vec<u32>,
icc: Vec<u32>,
// special register that enables interrupts and affinity routing
gicd_ctlr: u32,
its_ctlr: u64,
its_iidr: u64,
its_cbaser: u64,
its_cwriter: u64,
its_creadr: u64,
its_baser: [u64; 8],
}
impl KvmGicV3Its {
// Device trees specific constants
pub const ARCH_GIC_V3_MAINT_IRQ: u32 = 9;
/// Get the address of the GIC distributor.
pub fn get_dist_addr() -> u64 {
layout::GIC_V3_DIST_START.raw_value()
}
/// Get the size of the GIC distributor.
pub fn get_dist_size() -> u64 {
layout::GIC_V3_DIST_SIZE
}
/// Get the address of the GIC redistributors.
pub fn get_redists_addr(vcpu_count: u64) -> u64 {
KvmGicV3Its::get_dist_addr() - KvmGicV3Its::get_redists_size(vcpu_count)
}
/// Get the size of the GIC redistributors.
pub fn get_redists_size(vcpu_count: u64) -> u64 {
vcpu_count * layout::GIC_V3_REDIST_SIZE
}
fn get_msi_size() -> u64 {
layout::GIC_V3_ITS_SIZE
}
fn get_msi_addr(vcpu_count: u64) -> u64 {
KvmGicV3Its::get_redists_addr(vcpu_count) - KvmGicV3Its::get_msi_size()
}
/// Save the state of GICv3ITS.
fn state(&self, gicr_typers: &[u64]) -> Result<Gicv3ItsState> {
let gicd_ctlr =
read_ctlr(self.device()).map_err(Error::SaveDistributorCtrlRegisters)?;
let dist_state =
get_dist_regs(self.device()).map_err(Error::SaveDistributorRegisters)?;
let rdist_state = get_redist_regs(self.device(), gicr_typers)
.map_err(Error::SaveRedistributorRegisters)?;
let icc_state =
get_icc_regs(self.device(), gicr_typers).map_err(Error::SaveIccRegisters)?;
let its_baser_state: [u64; 8] = [0; 8];
for i in 0..8 {
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8,
&its_baser_state[i as usize],
false,
)
.map_err(Error::SaveITSBASER)?;
}
let its_ctlr_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR,
&its_ctlr_state,
false,
)
.map_err(Error::SaveITSCTLR)?;
let its_cbaser_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER,
&its_cbaser_state,
false,
)
.map_err(Error::SaveITSCBASER)?;
let its_creadr_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR,
&its_creadr_state,
false,
)
.map_err(Error::SaveITSCREADR)?;
let its_cwriter_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER,
&its_cwriter_state,
false,
)
.map_err(Error::SaveITSCWRITER)?;
let its_iidr_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR,
&its_iidr_state,
false,
)
.map_err(Error::SaveITSIIDR)?;
Ok(Gicv3ItsState {
dist: dist_state,
rdist: rdist_state,
icc: icc_state,
gicd_ctlr,
its_ctlr: its_ctlr_state,
its_iidr: its_iidr_state,
its_cbaser: its_cbaser_state,
its_cwriter: its_cwriter_state,
its_creadr: its_creadr_state,
its_baser: its_baser_state,
})
}
/// Restore the state of GICv3ITS.
fn set_state(&mut self, gicr_typers: &[u64], state: &Gicv3ItsState) -> Result<()> {
write_ctlr(self.device(), state.gicd_ctlr)
.map_err(Error::RestoreDistributorCtrlRegisters)?;
set_dist_regs(self.device(), &state.dist)
.map_err(Error::RestoreDistributorRegisters)?;
set_redist_regs(self.device(), gicr_typers, &state.rdist)
.map_err(Error::RestoreRedistributorRegisters)?;
set_icc_regs(self.device(), gicr_typers, &state.icc)
.map_err(Error::RestoreIccRegisters)?;
//Restore GICv3ITS registers
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR,
&state.its_iidr,
true,
)
.map_err(Error::RestoreITSIIDR)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER,
&state.its_cbaser,
true,
)
.map_err(Error::RestoreITSCBASER)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR,
&state.its_creadr,
true,
)
.map_err(Error::RestoreITSCREADR)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER,
&state.its_cwriter,
true,
)
.map_err(Error::RestoreITSCWRITER)?;
for i in 0..8 {
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8,
&state.its_baser[i as usize],
true,
)
.map_err(Error::RestoreITSBASER)?;
}
// Restore ITS tables
gicv3_its_tables_access(self.its_device().unwrap(), false)
.map_err(Error::RestoreITSTables)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR,
&state.its_ctlr,
true,
)
.map_err(Error::RestoreITSCTLR)?;
Ok(())
}
}
impl GicDevice for KvmGicV3Its {
fn device(&self) -> &Arc<dyn hypervisor::Device> {
&self.device
}
fn its_device(&self) -> Option<&Arc<dyn hypervisor::Device>> {
self.its_device.as_ref()
}
fn fdt_compatibility(&self) -> &str {
"arm,gic-v3"
}
fn msi_compatible(&self) -> bool {
true
}
fn msi_compatibility(&self) -> &str {
"arm,gic-v3-its"
}
fn fdt_maint_irq(&self) -> u32 {
KvmGicV3Its::ARCH_GIC_V3_MAINT_IRQ
}
fn msi_properties(&self) -> &[u64] {
&self.msi_properties
}
fn device_properties(&self) -> &[u64] {
&self.gic_properties
}
fn vcpu_count(&self) -> u64 {
self.vcpu_count
}
fn set_its_device(&mut self, its_device: Option<Arc<dyn hypervisor::Device>>) {
self.its_device = its_device;
}
fn set_gicr_typers(&mut self, vcpu_states: &[CpuState]) {
let gicr_typers = construct_gicr_typers(vcpu_states);
self.gicr_typers = gicr_typers;
}
fn as_any_concrete_mut(&mut self) -> &mut dyn Any {
self
}
}
impl KvmGicDevice for KvmGicV3Its {
fn version() -> u32 {
kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V3
}
fn create_device(
device: Arc<dyn hypervisor::Device>,
vcpu_count: u64,
) -> Box<dyn GicDevice> {
Box::new(KvmGicV3Its {
device,
its_device: None,
gicr_typers: vec![0; vcpu_count.try_into().unwrap()],
gic_properties: [
KvmGicV3Its::get_dist_addr(),
KvmGicV3Its::get_dist_size(),
KvmGicV3Its::get_redists_addr(vcpu_count),
KvmGicV3Its::get_redists_size(vcpu_count),
],
msi_properties: [
KvmGicV3Its::get_msi_addr(vcpu_count),
KvmGicV3Its::get_msi_size(),
],
vcpu_count,
})
}
fn init_device_attributes(
vm: &Arc<dyn hypervisor::Vm>,
gic_device: &mut dyn GicDevice,
) -> crate::aarch64::gic::Result<()> {
// GicV3 part attributes
/* Setting up the distributor attribute.
We are placing the GIC below 1GB so we need to substract the size of the distributor.
*/
Self::set_device_attribute(
gic_device.device(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_DIST),
&KvmGicV3Its::get_dist_addr() as *const u64 as u64,
0,
)?;
/* Setting up the redistributors' attribute.
We are calculating here the start of the redistributors address. We have one per CPU.
*/
Self::set_device_attribute(
gic_device.device(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_REDIST),
&KvmGicV3Its::get_redists_addr(gic_device.vcpu_count()) as *const u64 as u64,
0,
)?;
// ITS part attributes
let mut its_device = kvm_bindings::kvm_create_device {
type_: kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_ITS,
fd: 0,
flags: 0,
};
let its_fd = vm
.create_device(&mut its_device)
.map_err(crate::aarch64::gic::Error::CreateGic)?;
Self::set_device_attribute(
&its_fd,
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_ITS_ADDR_TYPE),
&KvmGicV3Its::get_msi_addr(gic_device.vcpu_count()) as *const u64 as u64,
0,
)?;
Self::set_device_attribute(
&its_fd,
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
u64::from(kvm_bindings::KVM_DEV_ARM_VGIC_CTRL_INIT),
0,
0,
)?;
gic_device.set_its_device(Some(its_fd));
Ok(())
}
}
pub const GIC_V3_ITS_SNAPSHOT_ID: &str = "gic-v3-its";
impl Snapshottable for KvmGicV3Its {
fn id(&self) -> String {
GIC_V3_ITS_SNAPSHOT_ID.to_string()
}
fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
let gicr_typers = self.gicr_typers.clone();
Snapshot::new_from_state(&self.id(), &self.state(&gicr_typers).unwrap())
}
fn restore(&mut self, snapshot: Snapshot) -> std::result::Result<(), MigratableError> {
let gicr_typers = self.gicr_typers.clone();
self.set_state(&gicr_typers, &snapshot.to_state(&self.id())?)
.map_err(|e| {
MigratableError::Restore(anyhow!("Could not restore GICv3ITS state {:?}", e))
})
}
}
impl Pausable for KvmGicV3Its {
fn pause(&mut self) -> std::result::Result<(), MigratableError> {
// Flush redistributors pending tables to guest RAM.
save_pending_tables(self.device()).map_err(|e| {
MigratableError::Pause(anyhow!(
"Could not save GICv3ITS GIC pending tables {:?}",
e
))
})?;
// Flush ITS tables to guest RAM.
gicv3_its_tables_access(self.its_device().unwrap(), true).map_err(|e| {
MigratableError::Pause(anyhow!("Could not save GICv3ITS ITS tables {:?}", e))
})?;
Ok(())
}
}
impl Transportable for KvmGicV3Its {}
impl Migratable for KvmGicV3Its {}
}

485
arch/src/aarch64/gic/mod.rs
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@ -3,7 +3,6 @@
// SPDX-License-Identifier: Apache-2.0
pub mod dist_regs;
pub mod gicv3_its;
pub mod icc_regs;
pub mod redist_regs;
@ -73,30 +72,388 @@ pub trait GicDevice: Send {
}
pub mod kvm {
use super::GicDevice;
use super::Result;
use crate::aarch64::gic::gicv3_its::kvm::KvmGicV3Its;
use crate::aarch64::gic::dist_regs::{get_dist_regs, read_ctlr, set_dist_regs, write_ctlr};
use crate::aarch64::gic::icc_regs::{get_icc_regs, set_icc_regs};
use crate::aarch64::gic::redist_regs::{
construct_gicr_typers, get_redist_regs, set_redist_regs,
};
use crate::aarch64::gic::GicDevice;
use crate::layout;
use anyhow::anyhow;
use hypervisor::kvm::kvm_bindings;
use hypervisor::CpuState;
use serde::{Deserialize, Serialize};
use std::any::Any;
use std::boxed::Box;
use std::convert::TryInto;
use std::sync::Arc;
use vm_memory::Address;
use vm_migration::{
Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable,
};
const GITS_CTLR: u32 = 0x0000;
const GITS_IIDR: u32 = 0x0004;
const GITS_CBASER: u32 = 0x0080;
const GITS_CWRITER: u32 = 0x0088;
const GITS_CREADR: u32 = 0x0090;
const GITS_BASER: u32 = 0x0100;
/// Access an ITS device attribute.
///
/// This is a helper function to get/set the ITS device attribute depending
/// the bool parameter `set` provided.
pub fn gicv3_its_attr_access(
its_device: &Arc<dyn hypervisor::Device>,
group: u32,
attr: u32,
val: &u64,
set: bool,
) -> crate::aarch64::gic::Result<()> {
let mut gicv3_its_attr = kvm_bindings::kvm_device_attr {
group,
attr: attr as u64,
addr: val as *const u64 as u64,
flags: 0,
};
if set {
its_device
.set_device_attr(&gicv3_its_attr)
.map_err(crate::aarch64::gic::Error::SetDeviceAttribute)?;
} else {
its_device
.get_device_attr(&mut gicv3_its_attr)
.map_err(crate::aarch64::gic::Error::GetDeviceAttribute)?;
}
Ok(())
}
/// Function that saves/restores ITS tables into guest RAM.
///
/// The tables get flushed to guest RAM whenever the VM gets stopped.
pub fn gicv3_its_tables_access(
its_device: &Arc<dyn hypervisor::Device>,
save: bool,
) -> crate::aarch64::gic::Result<()> {
let attr = if save {
u64::from(kvm_bindings::KVM_DEV_ARM_ITS_SAVE_TABLES)
} else {
u64::from(kvm_bindings::KVM_DEV_ARM_ITS_RESTORE_TABLES)
};
let init_gic_attr = kvm_bindings::kvm_device_attr {
group: kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
attr,
addr: 0,
flags: 0,
};
its_device
.set_device_attr(&init_gic_attr)
.map_err(crate::aarch64::gic::Error::SetDeviceAttribute)
}
pub struct KvmGicV3Its {
/// The hypervisor agnostic device for the GicV3
device: Arc<dyn hypervisor::Device>,
/// The hypervisor agnostic device for the Its device
its_device: Option<Arc<dyn hypervisor::Device>>,
/// Vector holding values of GICR_TYPER for each vCPU
gicr_typers: Vec<u64>,
/// GIC device properties, to be used for setting up the fdt entry
gic_properties: [u64; 4],
/// MSI device properties, to be used for setting up the fdt entry
msi_properties: [u64; 2],
/// Number of CPUs handled by the device
vcpu_count: u64,
}
#[derive(Clone, Default, Serialize, Deserialize)]
pub struct Gicv3ItsState {
dist: Vec<u32>,
rdist: Vec<u32>,
icc: Vec<u32>,
// special register that enables interrupts and affinity routing
gicd_ctlr: u32,
its_ctlr: u64,
its_iidr: u64,
its_cbaser: u64,
its_cwriter: u64,
its_creadr: u64,
its_baser: [u64; 8],
}
impl KvmGicV3Its {
/// Device trees specific constants
pub const ARCH_GIC_V3_MAINT_IRQ: u32 = 9;
/// Get the address of the GIC distributor.
pub fn get_dist_addr() -> u64 {
layout::GIC_V3_DIST_START.raw_value()
}
/// Get the size of the GIC distributor.
pub fn get_dist_size() -> u64 {
layout::GIC_V3_DIST_SIZE
}
/// Get the address of the GIC redistributors.
pub fn get_redists_addr(vcpu_count: u64) -> u64 {
KvmGicV3Its::get_dist_addr() - KvmGicV3Its::get_redists_size(vcpu_count)
}
/// Get the size of the GIC redistributors.
pub fn get_redists_size(vcpu_count: u64) -> u64 {
vcpu_count * layout::GIC_V3_REDIST_SIZE
}
fn get_msi_size() -> u64 {
layout::GIC_V3_ITS_SIZE
}
fn get_msi_addr(vcpu_count: u64) -> u64 {
KvmGicV3Its::get_redists_addr(vcpu_count) - KvmGicV3Its::get_msi_size()
}
/// Save the state of GICv3ITS.
fn state(&self, gicr_typers: &[u64]) -> Result<Gicv3ItsState> {
let gicd_ctlr = read_ctlr(self.device())?;
let dist_state = get_dist_regs(self.device())?;
let rdist_state = get_redist_regs(self.device(), gicr_typers)?;
let icc_state = get_icc_regs(self.device(), gicr_typers)?;
let its_baser_state: [u64; 8] = [0; 8];
for i in 0..8 {
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8,
&its_baser_state[i as usize],
false,
)?;
}
let its_ctlr_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR,
&its_ctlr_state,
false,
)?;
let its_cbaser_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER,
&its_cbaser_state,
false,
)?;
let its_creadr_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR,
&its_creadr_state,
false,
)?;
let its_cwriter_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER,
&its_cwriter_state,
false,
)?;
let its_iidr_state: u64 = 0;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR,
&its_iidr_state,
false,
)?;
Ok(Gicv3ItsState {
dist: dist_state,
rdist: rdist_state,
icc: icc_state,
gicd_ctlr,
its_ctlr: its_ctlr_state,
its_iidr: its_iidr_state,
its_cbaser: its_cbaser_state,
its_cwriter: its_cwriter_state,
its_creadr: its_creadr_state,
its_baser: its_baser_state,
})
}
/// Restore the state of GICv3ITS.
fn set_state(&mut self, gicr_typers: &[u64], state: &Gicv3ItsState) -> Result<()> {
write_ctlr(self.device(), state.gicd_ctlr)?;
set_dist_regs(self.device(), &state.dist)?;
set_redist_regs(self.device(), gicr_typers, &state.rdist)?;
set_icc_regs(self.device(), gicr_typers, &state.icc)?;
//Restore GICv3ITS registers
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_IIDR,
&state.its_iidr,
true,
)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CBASER,
&state.its_cbaser,
true,
)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CREADR,
&state.its_creadr,
true,
)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CWRITER,
&state.its_cwriter,
true,
)?;
for i in 0..8 {
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_BASER + i * 8,
&state.its_baser[i as usize],
true,
)?;
}
// Restore ITS tables
gicv3_its_tables_access(self.its_device().unwrap(), false)?;
gicv3_its_attr_access(
self.its_device().unwrap(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
GITS_CTLR,
&state.its_ctlr,
true,
)?;
Ok(())
}
/// Trait for GIC devices.
pub trait KvmGicDevice: Send + Sync + GicDevice {
/// Returns the GIC version of the device
fn version() -> u32;
fn version() -> u32 {
kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_V3
}
/// Create the GIC device object
fn create_device(
device: Arc<dyn hypervisor::Device>,
vcpu_count: u64,
) -> Box<dyn GicDevice>;
) -> Box<dyn GicDevice> {
Box::new(KvmGicV3Its {
device,
its_device: None,
gicr_typers: vec![0; vcpu_count.try_into().unwrap()],
gic_properties: [
KvmGicV3Its::get_dist_addr(),
KvmGicV3Its::get_dist_size(),
KvmGicV3Its::get_redists_addr(vcpu_count),
KvmGicV3Its::get_redists_size(vcpu_count),
],
msi_properties: [
KvmGicV3Its::get_msi_addr(vcpu_count),
KvmGicV3Its::get_msi_size(),
],
vcpu_count,
})
}
/// Setup the device-specific attributes
fn init_device_attributes(
vm: &Arc<dyn hypervisor::Vm>,
gic_device: &mut dyn GicDevice,
) -> Result<()>;
) -> crate::aarch64::gic::Result<()> {
// GicV3 part attributes
/* Setting up the distributor attribute.
We are placing the GIC below 1GB so we need to substract the size of the distributor.
*/
Self::set_device_attribute(
gic_device.device(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_DIST),
&KvmGicV3Its::get_dist_addr() as *const u64 as u64,
0,
)?;
/* Setting up the redistributors' attribute.
We are calculating here the start of the redistributors address. We have one per CPU.
*/
Self::set_device_attribute(
gic_device.device(),
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_V3_ADDR_TYPE_REDIST),
&KvmGicV3Its::get_redists_addr(gic_device.vcpu_count()) as *const u64 as u64,
0,
)?;
// ITS part attributes
let mut its_device = kvm_bindings::kvm_create_device {
type_: kvm_bindings::kvm_device_type_KVM_DEV_TYPE_ARM_VGIC_ITS,
fd: 0,
flags: 0,
};
let its_fd = vm
.create_device(&mut its_device)
.map_err(crate::aarch64::gic::Error::CreateGic)?;
Self::set_device_attribute(
&its_fd,
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
u64::from(kvm_bindings::KVM_VGIC_ITS_ADDR_TYPE),
&KvmGicV3Its::get_msi_addr(gic_device.vcpu_count()) as *const u64 as u64,
0,
)?;
Self::set_device_attribute(
&its_fd,
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
u64::from(kvm_bindings::KVM_DEV_ARM_VGIC_CTRL_INIT),
0,
0,
)?;
gic_device.set_its_device(Some(its_fd));
Ok(())
}
/// Initialize a GIC device
fn init_device(vm: &Arc<dyn hypervisor::Vm>) -> Result<Arc<dyn hypervisor::Device>> {
@ -131,27 +488,6 @@ pub mod kvm {
Ok(())
}
/// Get a GIC device attribute
fn get_device_attribute(
device: &Arc<dyn hypervisor::Device>,
group: u32,
attr: u64,
addr: u64,
flags: u32,
) -> Result<()> {
let mut attr = kvm_bindings::kvm_device_attr {
flags,
group,
attr,
addr,
};
device
.get_device_attr(&mut attr)
.map_err(super::Error::GetDeviceAttribute)?;
Ok(())
}
/// Finalize the setup of a GIC device
fn finalize_device(gic_device: &dyn GicDevice) -> Result<()> {
/* We need to tell the kernel how many irqs to support with this vgic.
@ -216,4 +552,95 @@ pub mod kvm {
gic.set_device_attr(&init_gic_attr)
.map_err(super::Error::SetDeviceAttribute)
}
impl GicDevice for KvmGicV3Its {
fn device(&self) -> &Arc<dyn hypervisor::Device> {
&self.device
}
fn its_device(&self) -> Option<&Arc<dyn hypervisor::Device>> {
self.its_device.as_ref()
}
fn fdt_compatibility(&self) -> &str {
"arm,gic-v3"
}
fn msi_compatible(&self) -> bool {
true
}
fn msi_compatibility(&self) -> &str {
"arm,gic-v3-its"
}
fn fdt_maint_irq(&self) -> u32 {
KvmGicV3Its::ARCH_GIC_V3_MAINT_IRQ
}
fn msi_properties(&self) -> &[u64] {
&self.msi_properties
}
fn device_properties(&self) -> &[u64] {
&self.gic_properties
}
fn vcpu_count(&self) -> u64 {
self.vcpu_count
}
fn set_its_device(&mut self, its_device: Option<Arc<dyn hypervisor::Device>>) {
self.its_device = its_device;
}
fn set_gicr_typers(&mut self, vcpu_states: &[CpuState]) {
let gicr_typers = construct_gicr_typers(vcpu_states);
self.gicr_typers = gicr_typers;
}
fn as_any_concrete_mut(&mut self) -> &mut dyn Any {
self
}
}
pub const GIC_V3_ITS_SNAPSHOT_ID: &str = "gic-v3-its";
impl Snapshottable for KvmGicV3Its {
fn id(&self) -> String {
GIC_V3_ITS_SNAPSHOT_ID.to_string()
}
fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
let gicr_typers = self.gicr_typers.clone();
Snapshot::new_from_state(&self.id(), &self.state(&gicr_typers).unwrap())
}
fn restore(&mut self, snapshot: Snapshot) -> std::result::Result<(), MigratableError> {
let gicr_typers = self.gicr_typers.clone();
self.set_state(&gicr_typers, &snapshot.to_state(&self.id())?)
.map_err(|e| {
MigratableError::Restore(anyhow!("Could not restore GICv3ITS state {:?}", e))
})
}
}
impl Pausable for KvmGicV3Its {
fn pause(&mut self) -> std::result::Result<(), MigratableError> {
// Flush redistributors pending tables to guest RAM.
save_pending_tables(self.device()).map_err(|e| {
MigratableError::Pause(anyhow!(
"Could not save GICv3ITS GIC pending tables {:?}",
e
))
})?;
// Flush ITS tables to guest RAM.
gicv3_its_tables_access(self.its_device().unwrap(), true).map_err(|e| {
MigratableError::Pause(anyhow!("Could not save GICv3ITS ITS tables {:?}", e))
})?;
Ok(())
}
}
impl Transportable for KvmGicV3Its {}
impl Migratable for KvmGicV3Its {}
}

2
vmm/src/device_manager.rs
View File

@ -30,7 +30,7 @@ use crate::{device_node, DEVICE_MANAGER_SNAPSHOT_ID};
use acpi_tables::{aml, aml::Aml};
use anyhow::anyhow;
#[cfg(target_arch = "aarch64")]
use arch::aarch64::gic::gicv3_its::kvm::KvmGicV3Its;
use arch::aarch64::gic::kvm::KvmGicV3Its;
use arch::layout;
#[cfg(target_arch = "x86_64")]
use arch::layout::{APIC_START, IOAPIC_SIZE, IOAPIC_START};

4
vmm/src/vm.rs
View File

@ -32,9 +32,9 @@ use crate::{
};
use anyhow::anyhow;
#[cfg(target_arch = "aarch64")]
use arch::aarch64::gic::gicv3_its::kvm::{KvmGicV3Its, GIC_V3_ITS_SNAPSHOT_ID};
#[cfg(target_arch = "aarch64")]
use arch::aarch64::gic::kvm::create_gic;
#[cfg(target_arch = "aarch64")]
use arch::aarch64::gic::kvm::{KvmGicV3Its, GIC_V3_ITS_SNAPSHOT_ID};
use arch::get_host_cpu_phys_bits;
#[cfg(target_arch = "x86_64")]
use arch::layout::{KVM_IDENTITY_MAP_START, KVM_TSS_START};