| // Copyright 2018 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| //! ARM 64-bit architecture support. |
| |
| #![cfg(any(target_arch = "arm", target_arch = "aarch64"))] |
| |
| use std::collections::BTreeMap; |
| use std::io; |
| use std::sync::Arc; |
| |
| use arch::{ |
| get_serial_cmdline, GetSerialCmdlineError, MsrConfig, MsrExitHandlerError, RunnableLinuxVm, |
| VmComponents, VmImage, |
| }; |
| use base::{Event, MemoryMappingBuilder, SendTube, Tube}; |
| use devices::serial_device::{SerialHardware, SerialParameters}; |
| use devices::{ |
| Bus, BusDeviceObj, BusError, IrqChip, IrqChipAArch64, PciAddress, PciConfigMmio, PciDevice, |
| }; |
| use hypervisor::{ |
| DeviceKind, Hypervisor, HypervisorCap, ProtectionType, VcpuAArch64, VcpuFeature, |
| VcpuRegAArch64, Vm, VmAArch64, |
| }; |
| use minijail::Minijail; |
| use remain::sorted; |
| use resources::{range_inclusive_len, MemRegion, SystemAllocator, SystemAllocatorConfig}; |
| use sync::Mutex; |
| use thiserror::Error; |
| use vm_control::BatteryType; |
| use vm_memory::{GuestAddress, GuestMemory, GuestMemoryError}; |
| |
| mod fdt; |
| |
| // We place the kernel at offset 8MB |
| const AARCH64_KERNEL_OFFSET: u64 = 0x800000; |
| const AARCH64_FDT_MAX_SIZE: u64 = 0x200000; |
| const AARCH64_INITRD_ALIGN: u64 = 0x1000000; |
| |
| // These constants indicate the address space used by the ARM vGIC. |
| const AARCH64_GIC_DIST_SIZE: u64 = 0x10000; |
| const AARCH64_GIC_CPUI_SIZE: u64 = 0x20000; |
| |
| // This indicates the start of DRAM inside the physical address space. |
| const AARCH64_PHYS_MEM_START: u64 = 0x80000000; |
| const AARCH64_AXI_BASE: u64 = 0x40000000; |
| const AARCH64_PLATFORM_MMIO_SIZE: u64 = 0x800000; |
| |
| // FDT is placed at the front of RAM when booting in BIOS mode. |
| const AARCH64_FDT_OFFSET_IN_BIOS_MODE: u64 = 0x0; |
| // Therefore, the BIOS is placed after the FDT in memory. |
| const AARCH64_BIOS_OFFSET: u64 = AARCH64_FDT_MAX_SIZE; |
| const AARCH64_BIOS_MAX_LEN: u64 = 1 << 20; |
| |
| const AARCH64_PROTECTED_VM_FW_MAX_SIZE: u64 = 0x200000; |
| const AARCH64_PROTECTED_VM_FW_START: u64 = |
| AARCH64_PHYS_MEM_START - AARCH64_PROTECTED_VM_FW_MAX_SIZE; |
| |
| const AARCH64_PVTIME_IPA_MAX_SIZE: u64 = 0x10000; |
| const AARCH64_PVTIME_IPA_START: u64 = AARCH64_MMIO_BASE - AARCH64_PVTIME_IPA_MAX_SIZE; |
| const AARCH64_PVTIME_SIZE: u64 = 64; |
| |
| // These constants indicate the placement of the GIC registers in the physical |
| // address space. |
| const AARCH64_GIC_DIST_BASE: u64 = AARCH64_AXI_BASE - AARCH64_GIC_DIST_SIZE; |
| const AARCH64_GIC_CPUI_BASE: u64 = AARCH64_GIC_DIST_BASE - AARCH64_GIC_CPUI_SIZE; |
| const AARCH64_GIC_REDIST_SIZE: u64 = 0x20000; |
| |
| // PSR (Processor State Register) bits |
| const PSR_MODE_EL1H: u64 = 0x00000005; |
| const PSR_F_BIT: u64 = 0x00000040; |
| const PSR_I_BIT: u64 = 0x00000080; |
| const PSR_A_BIT: u64 = 0x00000100; |
| const PSR_D_BIT: u64 = 0x00000200; |
| |
| fn get_kernel_addr() -> GuestAddress { |
| GuestAddress(AARCH64_PHYS_MEM_START + AARCH64_KERNEL_OFFSET) |
| } |
| |
| fn get_bios_addr() -> GuestAddress { |
| GuestAddress(AARCH64_PHYS_MEM_START + AARCH64_BIOS_OFFSET) |
| } |
| |
| // Serial device requires 8 bytes of registers; |
| const AARCH64_SERIAL_SIZE: u64 = 0x8; |
| // This was the speed kvmtool used, not sure if it matters. |
| const AARCH64_SERIAL_SPEED: u32 = 1843200; |
| // The serial device gets the first interrupt line |
| // Which gets mapped to the first SPI interrupt (physical 32). |
| const AARCH64_SERIAL_1_3_IRQ: u32 = 0; |
| const AARCH64_SERIAL_2_4_IRQ: u32 = 2; |
| |
| // Place the RTC device at page 2 |
| const AARCH64_RTC_ADDR: u64 = 0x2000; |
| // The RTC device gets one 4k page |
| const AARCH64_RTC_SIZE: u64 = 0x1000; |
| // The RTC device gets the second interrupt line |
| const AARCH64_RTC_IRQ: u32 = 1; |
| |
| // PCI MMIO configuration region base address. |
| const AARCH64_PCI_CFG_BASE: u64 = 0x10000; |
| // PCI MMIO configuration region size. |
| const AARCH64_PCI_CFG_SIZE: u64 = 0x1000000; |
| // This is the base address of MMIO devices. |
| const AARCH64_MMIO_BASE: u64 = 0x2000000; |
| // Size of the whole MMIO region. |
| const AARCH64_MMIO_SIZE: u64 = 0x2000000; |
| // Virtio devices start at SPI interrupt number 3 |
| const AARCH64_IRQ_BASE: u32 = 3; |
| |
| // PMU PPI interrupt, same as qemu |
| const AARCH64_PMU_IRQ: u32 = 7; |
| |
| #[sorted] |
| #[derive(Error, Debug)] |
| pub enum Error { |
| #[error("bios could not be loaded: {0}")] |
| BiosLoadFailure(arch::LoadImageError), |
| #[error("failed to build arm pvtime memory: {0}")] |
| BuildPvtimeError(base::MmapError), |
| #[error("unable to clone an Event: {0}")] |
| CloneEvent(base::Error), |
| #[error("failed to clone IRQ chip: {0}")] |
| CloneIrqChip(base::Error), |
| #[error("the given kernel command line was invalid: {0}")] |
| Cmdline(kernel_cmdline::Error), |
| #[error("unable to make an Event: {0}")] |
| CreateEvent(base::Error), |
| #[error("FDT could not be created: {0}")] |
| CreateFdt(arch::fdt::Error), |
| #[error("failed to create GIC: {0}")] |
| CreateGICFailure(base::Error), |
| #[error("failed to create a PCI root hub: {0}")] |
| CreatePciRoot(arch::DeviceRegistrationError), |
| #[error("failed to create platform bus: {0}")] |
| CreatePlatformBus(arch::DeviceRegistrationError), |
| #[error("unable to create serial devices: {0}")] |
| CreateSerialDevices(arch::DeviceRegistrationError), |
| #[error("failed to create socket: {0}")] |
| CreateSocket(io::Error), |
| #[error("failed to create VCPU: {0}")] |
| CreateVcpu(base::Error), |
| #[error("vm created wrong kind of vcpu")] |
| DowncastVcpu, |
| #[error("failed to finalize IRQ chip: {0}")] |
| FinalizeIrqChip(base::Error), |
| #[error("failed to get PSCI version: {0}")] |
| GetPsciVersion(base::Error), |
| #[error("failed to get serial cmdline: {0}")] |
| GetSerialCmdline(GetSerialCmdlineError), |
| #[error("failed to initialize arm pvtime: {0}")] |
| InitPvtimeError(base::Error), |
| #[error("initrd could not be loaded: {0}")] |
| InitrdLoadFailure(arch::LoadImageError), |
| #[error("kernel could not be loaded: {0}")] |
| KernelLoadFailure(arch::LoadImageError), |
| #[error("error loading Kernel from Elf image: {0}")] |
| LoadElfKernel(kernel_loader::Error), |
| #[error("failed to map arm pvtime memory: {0}")] |
| MapPvtimeError(base::Error), |
| #[error("failed to protect vm: {0}")] |
| ProtectVm(base::Error), |
| #[error("pVM firmware could not be loaded: {0}")] |
| PvmFwLoadFailure(arch::LoadImageError), |
| #[error("ramoops address is different from high_mmio_base: {0} vs {1}")] |
| RamoopsAddress(u64, u64), |
| #[error("failed to register irq fd: {0}")] |
| RegisterIrqfd(base::Error), |
| #[error("error registering PCI bus: {0}")] |
| RegisterPci(BusError), |
| #[error("error registering virtual socket device: {0}")] |
| RegisterVsock(arch::DeviceRegistrationError), |
| #[error("failed to set device attr: {0}")] |
| SetDeviceAttr(base::Error), |
| #[error("failed to set register: {0}")] |
| SetReg(base::Error), |
| #[error("failed to set up guest memory: {0}")] |
| SetupGuestMemory(GuestMemoryError), |
| #[error("this function isn't supported")] |
| Unsupported, |
| #[error("failed to initialize VCPU: {0}")] |
| VcpuInit(base::Error), |
| } |
| |
| pub type Result<T> = std::result::Result<T, Error>; |
| |
| fn fdt_offset(mem_size: u64, has_bios: bool) -> u64 { |
| // TODO(rammuthiah) make kernel and BIOS startup use FDT from the same location. ARCVM startup |
| // currently expects the kernel at 0x80080000 and the FDT at the end of RAM for unknown reasons. |
| // Root cause and figure out how to fold these code paths together. |
| if has_bios { |
| AARCH64_FDT_OFFSET_IN_BIOS_MODE |
| } else { |
| // Put fdt up near the top of memory |
| // TODO(sonnyrao): will have to handle this differently if there's |
| // > 4GB memory |
| mem_size - AARCH64_FDT_MAX_SIZE - 0x10000 |
| } |
| } |
| |
| pub struct AArch64; |
| |
| impl arch::LinuxArch for AArch64 { |
| type Error = Error; |
| |
| /// Returns a Vec of the valid memory addresses. |
| /// These should be used to configure the GuestMemory structure for the platform. |
| fn guest_memory_layout( |
| components: &VmComponents, |
| ) -> std::result::Result<Vec<(GuestAddress, u64)>, Self::Error> { |
| let mut memory_regions = |
| vec![(GuestAddress(AARCH64_PHYS_MEM_START), components.memory_size)]; |
| |
| // Allocate memory for the pVM firmware. |
| if components.protected_vm == ProtectionType::UnprotectedWithFirmware { |
| memory_regions.push(( |
| GuestAddress(AARCH64_PROTECTED_VM_FW_START), |
| AARCH64_PROTECTED_VM_FW_MAX_SIZE, |
| )); |
| } |
| |
| Ok(memory_regions) |
| } |
| |
| fn get_system_allocator_config<V: Vm>(vm: &V) -> SystemAllocatorConfig { |
| Self::get_resource_allocator_config( |
| vm.get_memory().memory_size(), |
| vm.get_guest_phys_addr_bits(), |
| ) |
| } |
| |
| fn build_vm<V, Vcpu>( |
| mut components: VmComponents, |
| _vm_evt_wrtube: &SendTube, |
| system_allocator: &mut SystemAllocator, |
| serial_parameters: &BTreeMap<(SerialHardware, u8), SerialParameters>, |
| serial_jail: Option<Minijail>, |
| _battery: (&Option<BatteryType>, Option<Minijail>), |
| mut vm: V, |
| ramoops_region: Option<arch::pstore::RamoopsRegion>, |
| devs: Vec<(Box<dyn BusDeviceObj>, Option<Minijail>)>, |
| irq_chip: &mut dyn IrqChipAArch64, |
| vcpu_ids: &mut Vec<usize>, |
| ) -> std::result::Result<RunnableLinuxVm<V, Vcpu>, Self::Error> |
| where |
| V: VmAArch64, |
| Vcpu: VcpuAArch64, |
| { |
| let has_bios = match components.vm_image { |
| VmImage::Bios(_) => true, |
| _ => false, |
| }; |
| |
| let mem = vm.get_memory().clone(); |
| |
| // separate out image loading from other setup to get a specific error for |
| // image loading |
| let mut initrd = None; |
| let image_size = match components.vm_image { |
| VmImage::Bios(ref mut bios) => { |
| arch::load_image(&mem, bios, get_bios_addr(), AARCH64_BIOS_MAX_LEN) |
| .map_err(Error::BiosLoadFailure)? |
| } |
| VmImage::Kernel(ref mut kernel_image) => { |
| let kernel_end: u64; |
| let kernel_size: usize; |
| let elf_result = kernel_loader::load_kernel(&mem, get_kernel_addr(), kernel_image); |
| if elf_result == Err(kernel_loader::Error::InvalidElfMagicNumber) { |
| kernel_size = |
| arch::load_image(&mem, kernel_image, get_kernel_addr(), u64::max_value()) |
| .map_err(Error::KernelLoadFailure)?; |
| kernel_end = get_kernel_addr().offset() + kernel_size as u64; |
| } else { |
| kernel_end = elf_result.map_err(Error::LoadElfKernel)?; |
| kernel_size = kernel_end as usize - get_kernel_addr().offset() as usize; |
| } |
| initrd = match components.initrd_image { |
| Some(initrd_file) => { |
| let mut initrd_file = initrd_file; |
| let initrd_addr = |
| (kernel_end + (AARCH64_INITRD_ALIGN - 1)) & !(AARCH64_INITRD_ALIGN - 1); |
| let initrd_max_size = |
| components.memory_size - (initrd_addr - AARCH64_PHYS_MEM_START); |
| let initrd_addr = GuestAddress(initrd_addr); |
| let initrd_size = |
| arch::load_image(&mem, &mut initrd_file, initrd_addr, initrd_max_size) |
| .map_err(Error::InitrdLoadFailure)?; |
| Some((initrd_addr, initrd_size)) |
| } |
| None => None, |
| }; |
| kernel_size |
| } |
| }; |
| |
| let mut use_pmu = vm |
| .get_hypervisor() |
| .check_capability(HypervisorCap::ArmPmuV3); |
| let vcpu_count = components.vcpu_count; |
| let mut has_pvtime = true; |
| let mut vcpus = Vec::with_capacity(vcpu_count); |
| for vcpu_id in 0..vcpu_count { |
| let vcpu: Vcpu = *vm |
| .create_vcpu(vcpu_id) |
| .map_err(Error::CreateVcpu)? |
| .downcast::<Vcpu>() |
| .map_err(|_| Error::DowncastVcpu)?; |
| Self::configure_vcpu_early( |
| vm.get_memory(), |
| &vcpu, |
| vcpu_id, |
| use_pmu, |
| has_bios, |
| image_size, |
| components.protected_vm, |
| )?; |
| has_pvtime &= vcpu.has_pvtime_support(); |
| vcpus.push(vcpu); |
| vcpu_ids.push(vcpu_id); |
| } |
| |
| irq_chip.finalize().map_err(Error::FinalizeIrqChip)?; |
| |
| if has_pvtime { |
| let pvtime_mem = MemoryMappingBuilder::new(AARCH64_PVTIME_IPA_MAX_SIZE as usize) |
| .build() |
| .map_err(Error::BuildPvtimeError)?; |
| vm.add_memory_region( |
| GuestAddress(AARCH64_PVTIME_IPA_START), |
| Box::new(pvtime_mem), |
| false, |
| false, |
| ) |
| .map_err(Error::MapPvtimeError)?; |
| } |
| |
| match components.protected_vm { |
| ProtectionType::Protected => { |
| // Allocate memory for the pVM firmware and tell the hypervisor to load it. |
| vm.load_protected_vm_firmware( |
| GuestAddress(AARCH64_PROTECTED_VM_FW_START), |
| AARCH64_PROTECTED_VM_FW_MAX_SIZE, |
| ) |
| .map_err(Error::ProtectVm)?; |
| } |
| ProtectionType::UnprotectedWithFirmware => { |
| // Load pVM firmware ourself, as the VM is not really protected. |
| // `components.pvm_fw` is safe to unwrap because `protected_vm` is |
| // `UnprotectedWithFirmware`. |
| arch::load_image( |
| &mem, |
| &mut components.pvm_fw.unwrap(), |
| GuestAddress(AARCH64_PROTECTED_VM_FW_START), |
| AARCH64_PROTECTED_VM_FW_MAX_SIZE, |
| ) |
| .map_err(Error::PvmFwLoadFailure)?; |
| } |
| ProtectionType::Unprotected | ProtectionType::ProtectedWithoutFirmware => {} |
| } |
| |
| for (vcpu_id, vcpu) in vcpus.iter().enumerate() { |
| use_pmu &= vcpu.init_pmu(AARCH64_PMU_IRQ as u64 + 16).is_ok(); |
| if has_pvtime { |
| vcpu.init_pvtime(AARCH64_PVTIME_IPA_START + (vcpu_id as u64 * AARCH64_PVTIME_SIZE)) |
| .map_err(Error::InitPvtimeError)?; |
| } |
| } |
| |
| let mmio_bus = Arc::new(devices::Bus::new()); |
| |
| // ARM doesn't really use the io bus like x86, so just create an empty bus. |
| let io_bus = Arc::new(devices::Bus::new()); |
| |
| // Event used by PMDevice to notify crosvm that |
| // guest OS is trying to suspend. |
| let suspend_evt = Event::new().map_err(Error::CreateEvent)?; |
| |
| let (pci_devices, others): (Vec<_>, Vec<_>) = devs |
| .into_iter() |
| .partition(|(dev, _)| dev.as_pci_device().is_some()); |
| |
| let pci_devices = pci_devices |
| .into_iter() |
| .map(|(dev, jail_orig)| (dev.into_pci_device().unwrap(), jail_orig)) |
| .collect(); |
| let (pci, pci_irqs, mut pid_debug_label_map) = arch::generate_pci_root( |
| pci_devices, |
| irq_chip.as_irq_chip_mut(), |
| mmio_bus.clone(), |
| io_bus.clone(), |
| system_allocator, |
| &mut vm, |
| (devices::AARCH64_GIC_NR_SPIS - AARCH64_IRQ_BASE) as usize, |
| ) |
| .map_err(Error::CreatePciRoot)?; |
| |
| let pci_root = Arc::new(Mutex::new(pci)); |
| let pci_bus = Arc::new(Mutex::new(PciConfigMmio::new(pci_root.clone(), 8))); |
| let (platform_devices, _others): (Vec<_>, Vec<_>) = others |
| .into_iter() |
| .partition(|(dev, _)| dev.as_platform_device().is_some()); |
| |
| let platform_devices = platform_devices |
| .into_iter() |
| .map(|(dev, jail_orig)| (*(dev.into_platform_device().unwrap()), jail_orig)) |
| .collect(); |
| let mut platform_pid_debug_label_map = arch::generate_platform_bus( |
| platform_devices, |
| irq_chip.as_irq_chip_mut(), |
| &mmio_bus, |
| system_allocator, |
| ) |
| .map_err(Error::CreatePlatformBus)?; |
| pid_debug_label_map.append(&mut platform_pid_debug_label_map); |
| |
| Self::add_arch_devs(irq_chip.as_irq_chip_mut(), &mmio_bus)?; |
| |
| let com_evt_1_3 = devices::IrqEdgeEvent::new().map_err(Error::CreateEvent)?; |
| let com_evt_2_4 = devices::IrqEdgeEvent::new().map_err(Error::CreateEvent)?; |
| arch::add_serial_devices( |
| components.protected_vm, |
| &mmio_bus, |
| &com_evt_1_3.get_trigger(), |
| &com_evt_2_4.get_trigger(), |
| serial_parameters, |
| serial_jail, |
| ) |
| .map_err(Error::CreateSerialDevices)?; |
| |
| irq_chip |
| .register_edge_irq_event(AARCH64_SERIAL_1_3_IRQ, &com_evt_1_3) |
| .map_err(Error::RegisterIrqfd)?; |
| irq_chip |
| .register_edge_irq_event(AARCH64_SERIAL_2_4_IRQ, &com_evt_2_4) |
| .map_err(Error::RegisterIrqfd)?; |
| |
| mmio_bus |
| .insert(pci_bus.clone(), AARCH64_PCI_CFG_BASE, AARCH64_PCI_CFG_SIZE) |
| .map_err(Error::RegisterPci)?; |
| |
| let mut cmdline = Self::get_base_linux_cmdline(); |
| get_serial_cmdline(&mut cmdline, serial_parameters, "mmio") |
| .map_err(Error::GetSerialCmdline)?; |
| for param in components.extra_kernel_params { |
| cmdline.insert_str(¶m).map_err(Error::Cmdline)?; |
| } |
| |
| if let Some(ramoops_region) = ramoops_region { |
| arch::pstore::add_ramoops_kernel_cmdline(&mut cmdline, &ramoops_region) |
| .map_err(Error::Cmdline)?; |
| } |
| |
| let psci_version = vcpus[0].get_psci_version().map_err(Error::GetPsciVersion)?; |
| |
| let pci_cfg = fdt::PciConfigRegion { |
| base: AARCH64_PCI_CFG_BASE, |
| size: AARCH64_PCI_CFG_SIZE, |
| }; |
| |
| let pci_ranges: Vec<fdt::PciRange> = system_allocator |
| .mmio_pools() |
| .iter() |
| .map(|range| fdt::PciRange { |
| space: fdt::PciAddressSpace::Memory64, |
| bus_address: *range.start(), |
| cpu_physical_address: *range.start(), |
| size: range_inclusive_len(range).unwrap(), |
| prefetchable: false, |
| }) |
| .collect(); |
| |
| fdt::create_fdt( |
| AARCH64_FDT_MAX_SIZE as usize, |
| &mem, |
| pci_irqs, |
| pci_cfg, |
| &pci_ranges, |
| vcpu_count as u32, |
| components.cpu_clusters, |
| components.cpu_capacity, |
| fdt_offset(components.memory_size, has_bios), |
| cmdline.as_str(), |
| initrd, |
| components.android_fstab, |
| irq_chip.get_vgic_version() == DeviceKind::ArmVgicV3, |
| use_pmu, |
| psci_version, |
| components.swiotlb, |
| ) |
| .map_err(Error::CreateFdt)?; |
| |
| Ok(RunnableLinuxVm { |
| vm, |
| vcpu_count, |
| vcpus: Some(vcpus), |
| vcpu_affinity: components.vcpu_affinity, |
| no_smt: components.no_smt, |
| irq_chip: irq_chip.try_box_clone().map_err(Error::CloneIrqChip)?, |
| has_bios, |
| io_bus, |
| mmio_bus, |
| pid_debug_label_map, |
| suspend_evt, |
| rt_cpus: components.rt_cpus, |
| delay_rt: components.delay_rt, |
| bat_control: None, |
| pm: None, |
| resume_notify_devices: Vec::new(), |
| root_config: pci_root, |
| hotplug_bus: Vec::new(), |
| }) |
| } |
| |
| fn configure_vcpu<V: Vm>( |
| _vm: &V, |
| _hypervisor: &dyn Hypervisor, |
| _irq_chip: &mut dyn IrqChipAArch64, |
| _vcpu: &mut dyn VcpuAArch64, |
| _vcpu_id: usize, |
| _num_cpus: usize, |
| _has_bios: bool, |
| _no_smt: bool, |
| _host_cpu_topology: bool, |
| _itmt: bool, |
| ) -> std::result::Result<(), Self::Error> { |
| // AArch64 doesn't configure vcpus on the vcpu thread, so nothing to do here. |
| Ok(()) |
| } |
| |
| fn register_pci_device<V: VmAArch64, Vcpu: VcpuAArch64>( |
| _linux: &mut RunnableLinuxVm<V, Vcpu>, |
| _device: Box<dyn PciDevice>, |
| _minijail: Option<Minijail>, |
| _resources: &mut SystemAllocator, |
| ) -> std::result::Result<PciAddress, Self::Error> { |
| // hotplug function isn't verified on AArch64, so set it unsupported here. |
| Err(Error::Unsupported) |
| } |
| } |
| |
| impl AArch64 { |
| /// This returns a base part of the kernel command for this architecture |
| fn get_base_linux_cmdline() -> kernel_cmdline::Cmdline { |
| let mut cmdline = kernel_cmdline::Cmdline::new(base::pagesize()); |
| cmdline.insert_str("panic=-1").unwrap(); |
| cmdline |
| } |
| |
| /// Returns a system resource allocator configuration. |
| /// |
| /// # Arguments |
| /// |
| /// * `mem_size` - Size of guest memory (RAM) in bytes. |
| /// * `guest_phys_addr_bits` - Size of guest physical addresses (IPA) in bits. |
| fn get_resource_allocator_config( |
| mem_size: u64, |
| guest_phys_addr_bits: u8, |
| ) -> SystemAllocatorConfig { |
| let guest_phys_end = 1u64 << guest_phys_addr_bits; |
| // The platform MMIO region is immediately past the end of RAM. |
| let plat_mmio_base = AARCH64_PHYS_MEM_START + mem_size; |
| let plat_mmio_size = AARCH64_PLATFORM_MMIO_SIZE; |
| // The high MMIO region is the rest of the address space after the platform MMIO region. |
| let high_mmio_base = plat_mmio_base + plat_mmio_size; |
| let high_mmio_size = guest_phys_end |
| .checked_sub(high_mmio_base) |
| .unwrap_or_else(|| { |
| panic!( |
| "guest_phys_end {:#x} < high_mmio_base {:#x}", |
| guest_phys_end, high_mmio_base, |
| ); |
| }); |
| SystemAllocatorConfig { |
| io: None, |
| low_mmio: MemRegion { |
| base: AARCH64_MMIO_BASE, |
| size: AARCH64_MMIO_SIZE, |
| }, |
| high_mmio: MemRegion { |
| base: high_mmio_base, |
| size: high_mmio_size, |
| }, |
| platform_mmio: Some(MemRegion { |
| base: plat_mmio_base, |
| size: plat_mmio_size, |
| }), |
| first_irq: AARCH64_IRQ_BASE, |
| } |
| } |
| |
| /// This adds any early platform devices for this architecture. |
| /// |
| /// # Arguments |
| /// |
| /// * `irq_chip` - The IRQ chip to add irqs to. |
| /// * `bus` - The bus to add devices to. |
| fn add_arch_devs(irq_chip: &mut dyn IrqChip, bus: &Bus) -> Result<()> { |
| let rtc_evt = devices::IrqEdgeEvent::new().map_err(Error::CreateEvent)?; |
| irq_chip |
| .register_edge_irq_event(AARCH64_RTC_IRQ, &rtc_evt) |
| .map_err(Error::RegisterIrqfd)?; |
| |
| let rtc = Arc::new(Mutex::new(devices::pl030::Pl030::new(rtc_evt))); |
| bus.insert(rtc, AARCH64_RTC_ADDR, AARCH64_RTC_SIZE) |
| .expect("failed to add rtc device"); |
| |
| Ok(()) |
| } |
| |
| /// Sets up `vcpu`. |
| /// |
| /// AArch64 needs vcpus set up before its kernel IRQ chip is created, so `configure_vcpu_early` |
| /// is called from `build_vm` on the main thread. `LinuxArch::configure_vcpu`, which is used |
| /// by X86_64 to do setup later from the vcpu thread, is a no-op on AArch64 since vcpus were |
| /// already configured here. |
| /// |
| /// # Arguments |
| /// |
| /// * `guest_mem` - The guest memory object. |
| /// * `vcpu` - The vcpu to configure. |
| /// * `vcpu_id` - The VM's index for `vcpu`. |
| /// * `use_pmu` - Should `vcpu` be configured to use the Performance Monitor Unit. |
| fn configure_vcpu_early( |
| guest_mem: &GuestMemory, |
| vcpu: &dyn VcpuAArch64, |
| vcpu_id: usize, |
| use_pmu: bool, |
| has_bios: bool, |
| image_size: usize, |
| protected_vm: ProtectionType, |
| ) -> Result<()> { |
| let mut features = vec![VcpuFeature::PsciV0_2]; |
| if use_pmu { |
| features.push(VcpuFeature::PmuV3); |
| } |
| // Non-boot cpus are powered off initially |
| if vcpu_id != 0 { |
| features.push(VcpuFeature::PowerOff) |
| } |
| vcpu.init(&features).map_err(Error::VcpuInit)?; |
| |
| // All interrupts masked |
| let pstate = PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | PSR_MODE_EL1H; |
| vcpu.set_one_reg(VcpuRegAArch64::Pstate, pstate) |
| .map_err(Error::SetReg)?; |
| |
| // Other cpus are powered off initially |
| if vcpu_id == 0 { |
| let entry_addr = if has_bios { |
| get_bios_addr() |
| } else { |
| get_kernel_addr() |
| }; |
| match protected_vm { |
| ProtectionType::Protected => { |
| vcpu.set_one_reg(VcpuRegAArch64::W1, entry_addr.offset()) |
| .map_err(Error::SetReg)?; |
| } |
| ProtectionType::UnprotectedWithFirmware => { |
| vcpu.set_one_reg(VcpuRegAArch64::Pc, AARCH64_PROTECTED_VM_FW_START) |
| .map_err(Error::SetReg)?; |
| vcpu.set_one_reg(VcpuRegAArch64::W1, entry_addr.offset()) |
| .map_err(Error::SetReg)?; |
| } |
| ProtectionType::Unprotected | ProtectionType::ProtectedWithoutFirmware => { |
| vcpu.set_one_reg(VcpuRegAArch64::Pc, entry_addr.offset()) |
| .map_err(Error::SetReg)?; |
| } |
| } |
| |
| /* X0 -- fdt address */ |
| let mem_size = guest_mem.memory_size(); |
| let fdt_addr = (AARCH64_PHYS_MEM_START + fdt_offset(mem_size, has_bios)) as u64; |
| vcpu.set_one_reg(VcpuRegAArch64::W0, fdt_addr) |
| .map_err(Error::SetReg)?; |
| |
| /* X2 -- image size */ |
| if matches!( |
| protected_vm, |
| ProtectionType::Protected | ProtectionType::UnprotectedWithFirmware |
| ) { |
| vcpu.set_one_reg(VcpuRegAArch64::W2, image_size as u64) |
| .map_err(Error::SetReg)?; |
| } |
| } |
| |
| Ok(()) |
| } |
| } |
| |
| pub struct MsrHandlers; |
| |
| impl MsrHandlers { |
| pub fn new() -> Self { |
| Self {} |
| } |
| |
| pub fn read(&self, _index: u32) -> Option<u64> { |
| None |
| } |
| |
| pub fn write(&self, _index: u32, _data: u64) -> Option<()> { |
| None |
| } |
| |
| pub fn add_handler( |
| &mut self, |
| _index: u32, |
| _msr_config: MsrConfig, |
| _cpu_id: usize, |
| ) -> std::result::Result<(), MsrExitHandlerError> { |
| Ok(()) |
| } |
| } |
