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vmm: Use an allocator specifically for RAM regions

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Rather than use the system MMIO allocator for RAM use an allocator that
covers the full RAM range.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-10-29 10:02:15 +01:00
parent b8fee11822
commit afe95e5a2a
1 changed files with 10 additions and 13 deletions
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23
vmm/src/memory_manager.rs
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@ -33,7 +33,7 @@ use versionize_derive::Versionize;
use virtio_devices::BlocksState;
#[cfg(target_arch = "x86_64")]
use vm_allocator::GsiApic;
use vm_allocator::SystemAllocator;
use vm_allocator::{AddressAllocator, SystemAllocator};
use vm_device::BusDevice;
use vm_memory::bitmap::AtomicBitmap;
use vm_memory::guest_memory::FileOffset;
@ -165,6 +165,7 @@ pub struct MemoryManager {
memory_zones: MemoryZones,
log_dirty: bool, // Enable dirty logging for created RAM regions
arch_mem_regions: Vec<ArchMemRegion>,
ram_allocator: AddressAllocator,
// Keep track of calls to create_userspace_mapping() for guest RAM.
// This is useful for getting the dirty pages as we need to know the
@ -785,10 +786,8 @@ impl MemoryManager {
virtio_mem,
file_offset,
});
self.allocator
.lock()
.unwrap()
.allocate_mmio_addresses(Some(region.start_addr()), region.len(), None)
self.ram_allocator
.allocate(Some(region.start_addr()), region.len(), None)
.ok_or(Error::MemoryRangeAllocation)?;
}
}
@ -800,10 +799,8 @@ impl MemoryManager {
// based on the GuestMemory regions.
continue;
}
self.allocator
.lock()
.unwrap()
.allocate_mmio_addresses(
self.ram_allocator
.allocate(
Some(GuestAddress(region.base)),
region.size as GuestUsize,
None,
@ -1020,6 +1017,7 @@ impl MemoryManager {
// If running on SGX the start of device area and RAM area may diverge but
// at this point they are next to each other.
let end_of_ram_area = start_of_device_area.unchecked_sub(1);
let ram_allocator = AddressAllocator::new(GuestAddress(0), start_of_device_area.0).unwrap();
let mut memory_manager = MemoryManager {
boot_guest_memory,
@ -1051,6 +1049,7 @@ impl MemoryManager {
acpi_address,
log_dirty,
arch_mem_regions,
ram_allocator,
};
memory_manager.allocate_address_space()?;
@ -1376,10 +1375,8 @@ impl MemoryManager {
}
// Tell the allocator
self.allocator
.lock()
.unwrap()
.allocate_mmio_addresses(Some(start_addr), size as GuestUsize, None)
self.ram_allocator
.allocate(Some(start_addr), size as GuestUsize, None)
.ok_or(Error::MemoryRangeAllocation)?;
// Update the slot so that it can be queried via the I/O port