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vmm: Validate balloon size against total RAM

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The total RAM in the system needs to consider any hotpluggable RAM that
is hotplugged in as well as the initial static "base" RAM.

Signed-off-by: Rob Bradford <rbradford@meta.com>
This commit is contained in:
Rob Bradford
2026-04-30 15:21:20 +01:00
parent f6ed896f68
commit 9411f7ecd8
1 changed files with 2 additions and 9 deletions
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11
vmm/src/config.rs
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@@ -316,7 +316,7 @@ pub enum ValidationError {
)]
InvalidIommuAddressWidthBits(u8),
/// Balloon too big
#[error("Ballon size ({0}) greater than RAM ({1})")]
#[error("Balloon size ({0}) greater than RAM ({1})")]
BalloonLargerThanRam(u64, u64),
/// On a IOMMU segment but not behind IOMMU
#[error("Device is on an IOMMU PCI segment ({0}) but not placed behind IOMMU")]
@@ -3044,14 +3044,7 @@ impl VmConfig {
}
if let Some(balloon) = &self.balloon {
let mut ram_size = self.memory.size;
if let Some(zones) = &self.memory.zones {
for zone in zones {
ram_size += zone.size;
}
}
let ram_size = self.memory.total_size();
if balloon.size >= ram_size {
return Err(ValidationError::BalloonLargerThanRam(
balloon.size,