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vmm: Support using existing files for memory slots

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2022-01-12 10:50:08 +00:00
parent eeba1d3ad8
commit b95e46565c
2 changed files with 13 additions and 3 deletions
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14
vmm/src/memory_manager.rs
View File

@ -532,6 +532,7 @@ impl MemoryManager {
guest_ram_mappings: &[GuestRamMapping],
zones_config: &[MemoryZoneConfig],
prefault: Option<bool>,
mut existing_memory_files: HashMap<u32, File>,
) -> Result<(Vec<Arc<GuestRegionMmap>>, MemoryZones), Error> {
let mut memory_regions = Vec::new();
let mut memory_zones = HashMap::new();
@ -556,7 +557,7 @@ impl MemoryManager {
zone_config.hugepages,
zone_config.hugepage_size,
zone_config.host_numa_node,
None,
existing_memory_files.remove(&guest_ram_mapping.slot),
)?;
memory_regions.push(Arc::clone(&region));
if let Some(memory_zone) = memory_zones.get_mut(&guest_ram_mapping.zone_id) {
@ -819,6 +820,7 @@ impl MemoryManager {
Ok(())
}
#[allow(clippy::too_many_arguments)]
pub fn new(
vm: Arc<dyn hypervisor::Vm>,
config: &MemoryConfig,
@ -826,6 +828,7 @@ impl MemoryManager {
phys_bits: u8,
#[cfg(feature = "tdx")] tdx_enabled: bool,
restore_data: Option<&MemoryManagerSnapshotData>,
existing_memory_files: Option<HashMap<u32, File>>,
#[cfg(target_arch = "x86_64")] sgx_epc_config: Option<Vec<SgxEpcConfig>>,
) -> Result<Arc<Mutex<MemoryManager>>, Error> {
let user_provided_zones = config.size == 0;
@ -855,8 +858,12 @@ impl MemoryManager {
selected_slot,
next_hotplug_slot,
) = if let Some(data) = restore_data {
let (regions, memory_zones) =
Self::restore_memory_regions_and_zones(&data.guest_ram_mappings, &zones, prefault)?;
let (regions, memory_zones) = Self::restore_memory_regions_and_zones(
&data.guest_ram_mappings,
&zones,
prefault,
existing_memory_files.unwrap_or_default(),
)?;
let guest_memory =
GuestMemoryMmap::from_arc_regions(regions).map_err(Error::GuestMemory)?;
let boot_guest_memory = guest_memory.clone();
@ -1096,6 +1103,7 @@ impl MemoryManager {
#[cfg(feature = "tdx")]
false,
Some(&mem_snapshot),
None,
#[cfg(target_arch = "x86_64")]
None,
)?;

2
vmm/src/vm.rs
View File

@ -777,6 +777,7 @@ impl Vm {
#[cfg(feature = "tdx")]
tdx_enabled,
None,
None,
#[cfg(target_arch = "x86_64")]
sgx_epc_config,
)
@ -896,6 +897,7 @@ impl Vm {
#[cfg(feature = "tdx")]
false,
Some(memory_manager_data),
None,
#[cfg(target_arch = "x86_64")]
None,
)