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vmm: Add support for multiple virtio-pmem devices

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Until now, the VMM was only accepting a single instance of virtio-pmem
device. This commit extend the virtio-pmem support by allowing several
devices to be created for a single VM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2019-06-28 01:45:58 -07:00 committed by Rob Bradford
parent 785db6295e
commit 34e09923a5
3 changed files with 75 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/main.rs
View File

@ -84,7 +84,8 @@ fn main() {
"Persistent memory parameters \"file=<backing_file_path>,\
size=<persistent_memory_size>\"",
)
.takes_value(true),
.takes_value(true)
.min_values(1),
)
.get_matches();
@ -110,7 +111,7 @@ fn main() {
let fs: Option<Vec<&str>> = cmd_arguments.values_of("fs").map(|x| x.collect());
let pmem = cmd_arguments.value_of("pmem");
let pmem: Option<Vec<&str>> = cmd_arguments.values_of("pmem").map(|x| x.collect());
let vm_config = match config::VmConfig::parse(config::VmParams {
cpus,

27
vmm/src/config.rs
View File

@ -64,7 +64,7 @@ pub struct VmParams<'a> {
pub net: Option<&'a str>,
pub rng: &'a str,
pub fs: Option<Vec<&'a str>>,
pub pmem: Option<&'a str>,
pub pmem: Option<Vec<&'a str>>,
}
pub struct CpusConfig(pub u8);
@ -302,13 +302,9 @@ pub struct PmemConfig<'a> {
}
impl<'a> PmemConfig<'a> {
pub fn parse(pmem: Option<&'a str>) -> Result<Option<Self>> {
if pmem.is_none() {
return Ok(None);
}
pub fn parse(pmem: &'a str) -> Result<Self> {
// Split the parameters based on the comma delimiter
let params_list: Vec<&str> = pmem.unwrap().split(',').collect();
let params_list: Vec<&str> = pmem.split(',').collect();
let mut file_str: &str = "";
let mut size_str: &str = "";
@ -325,10 +321,10 @@ impl<'a> PmemConfig<'a> {
return Err(Error::ParsePmemFileParam);
}
Ok(Some(PmemConfig {
Ok(PmemConfig {
file: Path::new(file_str),
size: size_str.parse::<u64>().map_err(Error::ParsePmemSizeParam)?,
}))
})
}
}
@ -341,7 +337,7 @@ pub struct VmConfig<'a> {
pub net: Option<NetConfig<'a>>,
pub rng: RngConfig<'a>,
pub fs: Option<Vec<FsConfig<'a>>>,
pub pmem: Option<PmemConfig<'a>>,
pub pmem: Option<Vec<PmemConfig<'a>>>,
}
impl<'a> VmConfig<'a> {
@ -360,6 +356,15 @@ impl<'a> VmConfig<'a> {
fs = Some(fs_config_list);
}
let mut pmem: Option<Vec<PmemConfig>> = None;
if let Some(pmem_list) = &vm_params.pmem {
let mut pmem_config_list = Vec::new();
for item in pmem_list.iter() {
pmem_config_list.push(PmemConfig::parse(item)?);
}
pmem = Some(pmem_config_list);
}
Ok(VmConfig {
cpus: CpusConfig::parse(vm_params.cpus)?,
memory: MemoryConfig::parse(vm_params.memory)?,
@ -369,7 +374,7 @@ impl<'a> VmConfig<'a> {
net: NetConfig::parse(vm_params.net)?,
rng: RngConfig::parse(vm_params.rng)?,
fs,
pmem: PmemConfig::parse(vm_params.pmem)?,
pmem,
})
}
}

110
vmm/src/vm.rs
View File

@ -633,65 +633,67 @@ impl DeviceManager {
}
// Add virtio-pmem if required
if let Some(pmem_cfg) = &vm_cfg.pmem {
let size = pmem_cfg.size;
if let Some(pmem_list_cfg) = &vm_cfg.pmem {
for pmem_cfg in pmem_list_cfg.iter() {
let size = pmem_cfg.size;
let pmem_guest_addr = allocator
.allocate_mmio_addresses(None, size as GuestUsize)
.ok_or(DeviceManagerError::PmemRangeAllocation)?;
let pmem_guest_addr = allocator
.allocate_mmio_addresses(None, size as GuestUsize)
.ok_or(DeviceManagerError::PmemRangeAllocation)?;
let (custom_flags, set_len) = if pmem_cfg.file.is_dir() {
(O_TMPFILE, true)
} else {
(0, false)
};
let (custom_flags, set_len) = if pmem_cfg.file.is_dir() {
(O_TMPFILE, true)
} else {
(0, false)
};
let file = OpenOptions::new()
.read(true)
.write(true)
.custom_flags(custom_flags)
.open(pmem_cfg.file)
.map_err(DeviceManagerError::PmemFileOpen)?;
let file = OpenOptions::new()
.read(true)
.write(true)
.custom_flags(custom_flags)
.open(pmem_cfg.file)
.map_err(DeviceManagerError::PmemFileOpen)?;
if set_len {
file.set_len(size)
.map_err(DeviceManagerError::PmemFileSetLen)?;
if set_len {
file.set_len(size)
.map_err(DeviceManagerError::PmemFileSetLen)?;
}
let addr = unsafe {
libc::mmap(
null_mut(),
size as usize,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_NORESERVE | libc::MAP_SHARED,
file.as_raw_fd(),
0 as libc::off_t,
) as *mut u8
};
let mem_region = kvm_userspace_memory_region {
slot: memory.num_regions() as u32,
guest_phys_addr: pmem_guest_addr.raw_value(),
memory_size: size,
userspace_addr: addr as u64,
flags: 0,
};
// Safe because the guest regions are guaranteed not to overlap.
let _ = unsafe { vm_fd.set_user_memory_region(mem_region) };
let virtio_pmem_device =
vm_virtio::Pmem::new(file, pmem_guest_addr, size as GuestUsize)
.map_err(DeviceManagerError::CreateVirtioPmem)?;
DeviceManager::add_virtio_pci_device(
Box::new(virtio_pmem_device),
memory.clone(),
allocator,
vm_fd,
&mut pci_root,
&mut mmio_bus,
&interrupt_info,
)?;
}
let addr = unsafe {
libc::mmap(
null_mut(),
size as usize,
libc::PROT_READ | libc::PROT_WRITE,
libc::MAP_NORESERVE | libc::MAP_SHARED,
file.as_raw_fd(),
0 as libc::off_t,
) as *mut u8
};
let mem_region = kvm_userspace_memory_region {
slot: memory.num_regions() as u32,
guest_phys_addr: pmem_guest_addr.raw_value(),
memory_size: size,
userspace_addr: addr as u64,
flags: 0,
};
// Safe because the guest regions are guaranteed not to overlap.
let _ = unsafe { vm_fd.set_user_memory_region(mem_region) };
let virtio_pmem_device =
vm_virtio::Pmem::new(file, pmem_guest_addr, size as GuestUsize)
.map_err(DeviceManagerError::CreateVirtioPmem)?;
DeviceManager::add_virtio_pci_device(
Box::new(virtio_pmem_device),
memory.clone(),
allocator,
vm_fd,
&mut pci_root,
&mut mmio_bus,
&interrupt_info,
)?;
}
let pci = Arc::new(Mutex::new(PciConfigIo::new(pci_root)));