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vmm: acpi: Move MemoryManager ACPI device to an MMIO address

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Migrate the MemoryManager from a fixed I/O port address to an allocated
MMIO address.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
2021-01-20 16:12:02 +00:00
committed by Sebastien Boeuf
parent 28ab6cea0e
commit 6006068951
2 changed files with 45 additions and 21 deletions
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37
vmm/src/memory_manager.rs
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@@ -44,6 +44,9 @@ use vm_migration::{
Transportable,
};
#[cfg(feature = "acpi")]
pub const MEMORY_MANAGER_ACPI_SIZE: usize = 0x18;
const DEFAULT_MEMORY_ZONE: &str = "mem0";
#[cfg(target_arch = "x86_64")]
@@ -134,6 +137,9 @@ pub struct MemoryManager {
// This is useful for getting the dirty pages as we need to know the
// slots that the mapping is created in.
guest_ram_mappings: Vec<GuestRamMapping>,
#[cfg(feature = "acpi")]
pub acpi_address: GuestAddress,
}
#[derive(Debug)]
@@ -253,6 +259,9 @@ pub enum Error {
// Error copying snapshot into region
SnapshotCopy(GuestMemoryError),
/// Failed to allocate MMIO address
AllocateMMIOAddress,
}
const ENABLE_FLAG: usize = 0;
@@ -294,6 +303,8 @@ impl BusDevice for MemoryManager {
data.copy_from_slice(&state.length.to_le_bytes()[4..]);
}
STATUS_OFFSET => {
// The Linux kernel, quite reasonably, doesn't zero the memory it gives us.
data.copy_from_slice(&[0; 8][0..data.len()]);
if state.active {
data[0] |= 1 << ENABLE_FLAG;
}
@@ -714,6 +725,13 @@ impl MemoryManager {
.ok_or(Error::CreateSystemAllocator)?,
));
#[cfg(feature = "acpi")]
let acpi_address = allocator
.lock()
.unwrap()
.allocate_mmio_addresses(None, MEMORY_MANAGER_ACPI_SIZE as u64, None)
.ok_or(Error::AllocateMMIOAddress)?;
let memory_manager = Arc::new(Mutex::new(MemoryManager {
boot_guest_memory,
guest_memory: guest_memory.clone(),
@@ -738,6 +756,8 @@ impl MemoryManager {
snapshot_memory_regions: Vec::new(),
memory_zones,
guest_ram_mappings: Vec::new(),
#[cfg(feature = "acpi")]
acpi_address,
}));
guest_memory.memory().with_regions(|_, region| {
@@ -1763,15 +1783,22 @@ impl Aml for MemoryManager {
&aml::Name::new("_UID".into(), &"Memory Hotplug Controller"),
// Mutex to protect concurrent access as we write to choose slot and then read back status
&aml::Mutex::new("MLCK".into(), 0),
// I/O port for memory controller
&aml::Name::new(
"_CRS".into(),
&aml::ResourceTemplate::new(vec![&aml::IO::new(
0x0a00, 0x0a00, 0x01, 0x18,
&aml::ResourceTemplate::new(vec![&aml::AddressSpace::new_memory(
aml::AddressSpaceCachable::NotCacheable,
true,
self.acpi_address.0 as u64,
self.acpi_address.0 + MEMORY_MANAGER_ACPI_SIZE as u64 - 1,
)]),
),
// OpRegion and Fields map I/O port into individual field values
&aml::OpRegion::new("MHPR".into(), aml::OpRegionSpace::SystemIO, 0xa00, 0x18),
// OpRegion and Fields map MMIO range into individual field values
&aml::OpRegion::new(
"MHPR".into(),
aml::OpRegionSpace::SystemMemory,
self.acpi_address.0 as usize,
MEMORY_MANAGER_ACPI_SIZE,
),
&aml::Field::new(
"MHPR".into(),
aml::FieldAccessType::DWord,