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vmm: Unify address space allocation

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It seems like address allocation has been spread into different files
and different location for x86 vs ARM. This makes it hard to follow the
code. Thus, unify it a single location which satisfies all the
requirement.

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
This commit is contained in:
Jinank Jain
2025-05-07 13:08:29 +00:00
parent 4e48f429eb
commit 034aa514d7
2 changed files with 15 additions and 42 deletions
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20
vmm/src/memory_manager.rs
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@@ -952,7 +952,7 @@ impl MemoryManager {
}
#[cfg(target_arch = "aarch64")]
fn add_uefi_flash(&mut self) -> Result<(), Error> {
pub fn add_uefi_flash(&mut self) -> Result<(), Error> {
// On AArch64, the UEFI binary requires a flash device at address 0.
// 4 MiB memory is mapped to simulate the flash.
let uefi_mem_slot = self.allocate_memory_slot();
@@ -1197,6 +1197,7 @@ impl MemoryManager {
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();
#[allow(unused_mut)]
let mut memory_manager = MemoryManager {
boot_guest_memory,
guest_memory,
@@ -1234,23 +1235,6 @@ impl MemoryManager {
thp: config.thp,
};
#[cfg(target_arch = "aarch64")]
{
// For Aarch64 we cannot lazily allocate the address space like we
// do for x86, because while restoring a VM from snapshot we would
// need the address space to be allocated to properly restore VGIC.
// And the restore of VGIC happens before we attempt to run the vCPUs
// for the first time, thus we need to allocate the address space
// beforehand.
memory_manager.allocate_address_space()?;
memory_manager.add_uefi_flash()?;
}
#[cfg(target_arch = "riscv64")]
{
memory_manager.allocate_address_space()?;
}
#[cfg(target_arch = "x86_64")]
if let Some(sgx_epc_config) = sgx_epc_config {
memory_manager.setup_sgx(sgx_epc_config)?;