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arch: AArch64: support saving RDIST pending tables into guest RAM

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This commit adds a function which allows to save RDIST pending
tables to the guest RAM, as well as unit test case for it.

Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit is contained in:
Henry Wang 2020-08-31 16:34:12 +08:00 committed by Rob Bradford
parent 29ce3076c2
commit e7acbcc184
2 changed files with 25 additions and 1 deletions
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14
arch/src/aarch64/gic/mod.rs
View File

@ -204,4 +204,18 @@ pub mod kvm {
})
}
}
/// Function that saves RDIST pending tables into guest RAM.
///
/// The tables get flushed to guest RAM whenever the VM gets stopped.
pub fn save_pending_tables(gic: &Arc<dyn hypervisor::Device>) -> Result<()> {
let init_gic_attr = kvm_bindings::kvm_device_attr {
group: kvm_bindings::KVM_DEV_ARM_VGIC_GRP_CTRL,
attr: u64::from(kvm_bindings::KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES),
addr: 0,
flags: 0,
};
gic.set_device_attr(&init_gic_attr)
.map_err(super::Error::SetDeviceAttribute)
}
}

12
vmm/src/interrupt.rs
View File

@ -395,7 +395,7 @@ pub mod kvm {
#[cfg(target_arch = "aarch64")]
#[cfg(test)]
mod tests {
use arch::aarch64::gic::kvm::create_gic;
use arch::aarch64::gic::kvm::{create_gic, save_pending_tables};
use arch::aarch64::gic::{
get_dist_regs, get_icc_regs, get_redist_regs, set_dist_regs, set_icc_regs, set_redist_regs,
};
@ -459,4 +459,14 @@ mod tests {
assert!(set_icc_regs(gic.device(), &gicr_typer, &state).is_ok());
}
#[test]
fn test_save_pending_tables() {
let hv = hypervisor::new().unwrap();
let vm = hv.create_vm().unwrap();
let _ = vm.create_vcpu(0).unwrap();
let gic = create_gic(&vm, 1, false).expect("Cannot create gic");
assert!(save_pending_tables(gic.device()).is_ok());
}
}