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vmm: memory_manager: Remove _PXM from ACPI memory slot

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The _PXM method always return 0, which is wrong since the SRAT might
tell differently. The point of the _PXM method is to be evaluated by the
guest OS when some new memory slot is being plugged, but this will never
happen for Cloud Hypervisor since using NUMA nodes along with memory
hotplug only works for virtio-mem.

Memory hotplug through ACPI will only happen when there's only one NUMA
node exposed to the guest, which means the _PXM method won't be needed
at all.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2021-06-17 11:16:24 +02:00
parent 07f3075773
commit 09c3ddd47d
1 changed files with 0 additions and 8 deletions
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8
vmm/src/memory_manager.rs
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@ -1614,14 +1614,6 @@ impl Aml for MemorySlot {
vec![&self.slot_id],
))],
),
// We don't expose any NUMA characteristics so all memory is in the same "proximity domain"
&aml::Method::new(
"_PXM".into(),
0,
false,
// We aren't NUMA so associate all RAM into the same proximity region (zero)
vec![&aml::Return::new(&0u32)],
),
],
)
.to_aml_bytes()