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vmm: Move codebase to GuestMemoryAtomic from vm-memory

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Relying on the latest vm-memory version, including the freshly
introduced structure GuestMemoryAtomic, this patch replaces every
occurrence of Arc<ArcSwap<GuestMemoryMmap> with
GuestMemoryAtomic<GuestMemoryMmap>.

The point is to rely on the common RCU-like implementation from
vm-memory so that we don't have to do it from Cloud-Hypervisor.

Fixes #735

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2020-02-11 17:22:40 +01:00
committed by Rob Bradford
parent ddf6caf955
commit 793d4e7b8d
23 changed files with 116 additions and 147 deletions
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11
vmm/src/cpu.rs
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@@ -11,7 +11,6 @@
use crate::device_manager::DeviceManager;
#[cfg(feature = "acpi")]
use acpi_tables::{aml, aml::Aml, sdt::SDT};
use arc_swap::ArcSwap;
#[cfg(feature = "acpi")]
use arch::layout;
use devices::{ioapic, BusDevice};
@@ -25,7 +24,7 @@ use std::sync::{Arc, Barrier, Mutex, Weak};
use std::thread;
use std::{fmt, io, result};
use vm_device::{Migratable, MigratableError, Pausable, Snapshotable};
use vm_memory::{Address, GuestAddress, GuestMemoryMmap};
use vm_memory::{Address, GuestAddress, GuestAddressSpace, GuestMemoryAtomic, GuestMemoryMmap};
use vmm_sys_util::eventfd::EventFd;
use vmm_sys_util::signal::{register_signal_handler, SIGRTMIN};
@@ -277,7 +276,7 @@ impl Vcpu {
pub fn configure(
&mut self,
kernel_start_addr: Option<GuestAddress>,
vm_memory: &Arc<ArcSwap<GuestMemoryMmap>>,
vm_memory: &GuestMemoryAtomic<GuestMemoryMmap>,
cpuid: CpuId,
) -> Result<()> {
let mut cpuid = cpuid;
@@ -297,7 +296,7 @@ impl Vcpu {
)
.map_err(Error::REGSConfiguration)?;
arch::x86_64::regs::setup_fpu(&self.fd).map_err(Error::FPUConfiguration)?;
arch::x86_64::regs::setup_sregs(&vm_memory.load(), &self.fd)
arch::x86_64::regs::setup_sregs(&vm_memory.memory(), &self.fd)
.map_err(Error::SREGSConfiguration)?;
}
arch::x86_64::interrupts::set_lint(&self.fd).map_err(Error::LocalIntConfiguration)?;
@@ -376,7 +375,7 @@ pub struct CpuManager {
io_bus: Weak<devices::Bus>,
mmio_bus: Arc<devices::Bus>,
ioapic: Option<Arc<Mutex<ioapic::Ioapic>>>,
vm_memory: Arc<ArcSwap<GuestMemoryMmap>>,
vm_memory: GuestMemoryAtomic<GuestMemoryMmap>,
cpuid: CpuId,
fd: Arc<VmFd>,
vcpus_kill_signalled: Arc<AtomicBool>,
@@ -496,7 +495,7 @@ impl CpuManager {
boot_vcpus: u8,
max_vcpus: u8,
device_manager: &DeviceManager,
guest_memory: Arc<ArcSwap<GuestMemoryMmap>>,
guest_memory: GuestMemoryAtomic<GuestMemoryMmap>,
fd: Arc<VmFd>,
cpuid: CpuId,
reset_evt: EventFd,