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vmm: Split configure_system() from load_kernel() for x86_64

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Now the flow of both architectures are aligned to:
1. load kernel
2. create VCPU's
3. configure system
4. start VCPU's

Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This commit is contained in:
Michael Zhao 2020-05-28 11:31:26 +08:00 committed by Sebastien Boeuf
parent 20cf21cd9d
commit 969e5e0b51
2 changed files with 63 additions and 48 deletions
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2
arch/src/x86_64/mod.rs
View File

@ -50,6 +50,8 @@ pub struct EntryPoint {
pub entry_addr: GuestAddress,
/// Specifies which boot protocol to use
pub protocol: BootProtocol,
/// This field is used for bzImage to fill zero page
pub setup_header: Option<setup_header>,
}
const E820_RAM: u32 = 1;

109
vmm/src/vm.rs
View File

@ -44,7 +44,6 @@ use devices::HotPlugNotificationFlags;
#[cfg(target_arch = "x86_64")]
use kvm_bindings::{kvm_enable_cap, kvm_userspace_memory_region, KVM_CAP_SPLIT_IRQCHIP};
use kvm_ioctls::*;
#[cfg(target_arch = "x86_64")]
use linux_loader::cmdline::Cmdline;
#[cfg(target_arch = "x86_64")]
use linux_loader::loader::elf::Error::InvalidElfMagicNumber;
@ -53,7 +52,6 @@ use linux_loader::loader::KernelLoader;
use signal_hook::{iterator::Signals, SIGINT, SIGTERM, SIGWINCH};
#[cfg(target_arch = "x86_64")]
use std::convert::TryInto;
#[cfg(target_arch = "x86_64")]
use std::ffi::CString;
use std::fs::{File, OpenOptions};
use std::io::{self, Write};
@ -475,13 +473,7 @@ impl Vm {
Ok(arch::InitramfsConfig { address, size })
}
#[cfg(target_arch = "aarch64")]
fn load_kernel(&mut self) -> Result<EntryPoint> {
unimplemented!();
}
#[cfg(target_arch = "x86_64")]
fn load_kernel(&mut self) -> Result<EntryPoint> {
fn get_cmdline(&mut self) -> Result<CString> {
let mut cmdline = Cmdline::new(arch::CMDLINE_MAX_SIZE);
cmdline
.insert_str(self.config.lock().unwrap().cmdline.args.clone())
@ -489,8 +481,17 @@ impl Vm {
for entry in self.device_manager.lock().unwrap().cmdline_additions() {
cmdline.insert_str(entry).map_err(Error::CmdLineInsertStr)?;
}
Ok(CString::new(cmdline).map_err(Error::CmdLineCString)?)
}
let cmdline_cstring = CString::new(cmdline).map_err(Error::CmdLineCString)?;
#[cfg(target_arch = "aarch64")]
fn load_kernel(&mut self) -> Result<EntryPoint> {
unimplemented!();
}
#[cfg(target_arch = "x86_64")]
fn load_kernel(&mut self) -> Result<EntryPoint> {
let cmdline_cstring = self.get_cmdline()?;
let guest_memory = self.memory_manager.lock().as_ref().unwrap().guest_memory();
let mem = guest_memory.memory();
let entry_addr = match linux_loader::loader::elf::Elf::load(
@ -521,6 +522,46 @@ impl Vm {
)
.map_err(Error::LoadCmdLine)?;
if entry_addr.setup_header.is_some() {
let load_addr = entry_addr
.kernel_load
.raw_value()
.checked_add(KERNEL_64BIT_ENTRY_OFFSET)
.ok_or(Error::MemOverflow)?;
Ok(EntryPoint {
entry_addr: GuestAddress(load_addr),
protocol: BootProtocol::LinuxBoot,
setup_header: entry_addr.setup_header,
})
} else {
let entry_point_addr: GuestAddress;
let boot_prot: BootProtocol;
if let Some(pvh_entry_addr) = entry_addr.pvh_entry_addr {
// Use the PVH kernel entry point to boot the guest
entry_point_addr = pvh_entry_addr;
boot_prot = BootProtocol::PvhBoot;
} else {
// Use the Linux 64-bit boot protocol
entry_point_addr = entry_addr.kernel_load;
boot_prot = BootProtocol::LinuxBoot;
}
Ok(EntryPoint {
entry_addr: entry_point_addr,
protocol: boot_prot,
setup_header: None,
})
}
}
#[cfg(target_arch = "x86_64")]
fn configure_system(&mut self, entry_addr: EntryPoint) -> Result<()> {
let cmdline_cstring = self.get_cmdline()?;
let guest_memory = self.memory_manager.lock().as_ref().unwrap().guest_memory();
let mem = guest_memory.memory();
let initramfs_config = match self.initramfs {
Some(_) => Some(self.load_initramfs(mem.deref())?),
None => None,
@ -554,32 +595,8 @@ impl Vm {
BootProtocol::LinuxBoot,
)
.map_err(Error::ConfigureSystem)?;
let load_addr = entry_addr
.kernel_load
.raw_value()
.checked_add(KERNEL_64BIT_ENTRY_OFFSET)
.ok_or(Error::MemOverflow)?;
Ok(EntryPoint {
entry_addr: GuestAddress(load_addr),
protocol: BootProtocol::LinuxBoot,
})
}
None => {
let entry_point_addr: GuestAddress;
let boot_prot: BootProtocol;
if let Some(pvh_entry_addr) = entry_addr.pvh_entry_addr {
// Use the PVH kernel entry point to boot the guest
entry_point_addr = pvh_entry_addr;
boot_prot = BootProtocol::PvhBoot;
} else {
// Use the Linux 64-bit boot protocol
entry_point_addr = entry_addr.kernel_load;
boot_prot = BootProtocol::LinuxBoot;
}
arch::configure_system(
&mem,
arch::layout::CMDLINE_START,
@ -588,20 +605,20 @@ impl Vm {
boot_vcpus,
None,
rsdp_addr,
boot_prot,
entry_addr.protocol,
)
.map_err(Error::ConfigureSystem)?;
Ok(EntryPoint {
entry_addr: entry_point_addr,
protocol: boot_prot,
})
}
}
Ok(())
}
#[cfg(target_arch = "aarch64")]
fn configure_system(&mut self) -> Result<()> {
fn configure_system(&mut self, _entry_addr: EntryPoint) -> Result<()> {
let _cmdline_cstring = self.get_cmdline()?;
// What to do on AArch64 is:
// - Setup GIC
// - Generate FDT
unimplemented!();
}
@ -984,20 +1001,16 @@ impl Vm {
let new_state = VmState::Running;
current_state.valid_transition(new_state)?;
// On x86_64, load_kernel() invokes configure_system().
// But on aarch64, it only loads kernel, configure_system()
// need to be postponed after VCPU's are created.
let entry_addr = self.load_kernel()?;
let entry_point = self.load_kernel()?;
// create and configure vcpus
self.cpu_manager
.lock()
.unwrap()
.create_boot_vcpus(entry_addr)
.create_boot_vcpus(entry_point)
.map_err(Error::CpuManager)?;
#[cfg(target_arch = "aarch64")]
self.configure_system()?;
self.configure_system(entry_point)?;
self.cpu_manager
.lock()