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vmm: memory_manager: Create a NUMA node list

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Based on the 'guest_numa_node' option, we create and store a list of
NUMA nodes in the MemoryManager. The point being to associate a list of
memory regions to each node, so that we can later create the ACPI tables
with the proper memory range information.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-08-27 14:16:50 +02:00
parent 768dbd1fb0
commit cf81254a8d
1 changed files with 42 additions and 5 deletions
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47
vmm/src/memory_manager.rs
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@ -19,6 +19,7 @@ use devices::BusDevice;
#[cfg(target_arch = "x86_64")]
use libc::{MAP_NORESERVE, MAP_POPULATE, MAP_SHARED, PROT_READ, PROT_WRITE};
use std::collections::BTreeMap;
use std::convert::TryInto;
use std::ffi;
use std::fs::{File, OpenOptions};
@ -62,6 +63,19 @@ struct HotPlugState {
removing: bool,
}
#[derive(Clone)]
pub struct NumaNode {
memory_regions: Vec<Arc<GuestRegionMmap>>,
}
impl NumaNode {
pub fn memory_regions(&self) -> &Vec<Arc<GuestRegionMmap>> {
&self.memory_regions
}
}
pub type NumaNodes = BTreeMap<u32, NumaNode>;
pub struct MemoryManager {
guest_memory: GuestMemoryAtomic<GuestMemoryMmap>,
next_memory_slot: u32,
@ -86,6 +100,7 @@ pub struct MemoryManager {
sgx_epc_region: Option<SgxEpcRegion>,
use_zones: bool,
snapshot_memory_regions: Vec<MemoryRegion>,
numa_nodes: NumaNodes,
}
#[derive(Debug)]
@ -284,11 +299,12 @@ impl MemoryManager {
zones: &[MemoryZoneConfig],
prefault: bool,
ext_regions: Option<Vec<MemoryRegion>>,
) -> Result<Vec<Arc<GuestRegionMmap>>, Error> {
) -> Result<(Vec<Arc<GuestRegionMmap>>, NumaNodes), Error> {
let mut zones = zones.to_owned();
let mut mem_regions = Vec::new();
let mut zone = zones.remove(0);
let mut zone_offset = 0;
let mut numa_nodes = BTreeMap::new();
for ram_region in ram_regions.iter() {
let mut ram_region_offset = 0;
@ -319,7 +335,7 @@ impl MemoryManager {
ram_region_sub_size
};
mem_regions.push(MemoryManager::create_ram_region(
let region = MemoryManager::create_ram_region(
&zone.file,
file_offset,
region_start,
@ -329,7 +345,23 @@ impl MemoryManager {
zone.hugepages,
zone.host_numa_node,
&ext_regions,
)?);
)?;
// Fill the list of NUMA nodes.
if let Some(node_id) = zone.guest_numa_node {
if let Some(node) = numa_nodes.get_mut(&node_id) as Option<&mut NumaNode> {
node.memory_regions.push(region.clone());
} else {
numa_nodes.insert(
node_id,
NumaNode {
memory_regions: vec![region.clone()],
},
);
}
}
mem_regions.push(region);
if pull_next_zone {
// Get the next zone and reset the offset.
@ -351,7 +383,7 @@ impl MemoryManager {
}
}
Ok(mem_regions)
Ok((mem_regions, numa_nodes))
}
pub fn new(
@ -424,7 +456,7 @@ impl MemoryManager {
.map(|r| (r.0, r.1))
.collect();
let mem_regions =
let (mem_regions, numa_nodes) =
Self::create_memory_regions_from_zones(&ram_regions, &zones, prefault, ext_regions)?;
let guest_memory =
@ -516,6 +548,7 @@ impl MemoryManager {
sgx_epc_region: None,
use_zones,
snapshot_memory_regions: Vec::new(),
numa_nodes,
}));
guest_memory.memory().with_regions(|_, region| {
@ -1196,6 +1229,10 @@ impl MemoryManager {
unsafe { (*stat.as_ptr()).st_nlink as usize > 0 }
}
pub fn numa_nodes(&self) -> &NumaNodes {
&self.numa_nodes
}
}
#[cfg(feature = "acpi")]