kata-containers/cloud-hypervisor
1
0
Fork 0
mirror of https://github.com/cloud-hypervisor/cloud-hypervisor.git synced 2026-08-05 02:19:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

arch: let arch_memory_regions return all available regions

Browse Source 
The previous `arch_memory_regions` function will provide some memory
regions with the specified memory size and fill all the previous
regions before using the next one, but sometimes there may be no need
to fill up the previous one, e.g., the previous one should be aligned
with hugepage size.

This commit make `arch_memory_regions` function not take any
parameters and return the max available regions, the memory manager
can use them on demand.

Fixes: #5463

Signed-off-by: Yu Li <liyu.yukiteru@bytedance.com>
This commit is contained in:
Yu Li
2023-06-07 12:01:17 +08:00
committed by Bo Chen
parent 1017157bb6
commit 55ee8eb482
3 changed files with 51 additions and 140 deletions
Download Patch File Download Diff File Expand all files Collapse all files

68
arch/src/aarch64/mod.rs
View File

@@ -19,7 +19,7 @@ use std::collections::HashMap;
use std::convert::TryInto;
use std::fmt::Debug;
use std::sync::{Arc, Mutex};
use vm_memory::{Address, GuestAddress, GuestMemory, GuestMemoryAtomic, GuestUsize};
use vm_memory::{Address, GuestAddress, GuestMemory, GuestMemoryAtomic};
pub const _NSIG: i32 = 65;
@@ -83,8 +83,8 @@ pub fn configure_vcpu(
Ok(mpidr)
}
pub fn arch_memory_regions(size: GuestUsize) -> Vec<(GuestAddress, usize, RegionType)> {
let mut regions = vec![
pub fn arch_memory_regions() -> Vec<(GuestAddress, usize, RegionType)> {
vec![
// 0 MiB ~ 256 MiB: UEFI, GIC and legacy devices
(
GuestAddress(0),
@@ -103,39 +103,21 @@ pub fn arch_memory_regions(size: GuestUsize) -> Vec<(GuestAddress, usize, Region
layout::PCI_MMCONFIG_SIZE as usize,
RegionType::Reserved,
),
];
let ram_32bit_space_size =
layout::MEM_32BIT_RESERVED_START.unchecked_offset_from(layout::RAM_START);
// RAM space
// Case1: guest memory fits before the gap
if size <= ram_32bit_space_size {
regions.push((layout::RAM_START, size as usize, RegionType::Ram));
// Case2: guest memory extends beyond the gap
} else {
// Push memory before the gap
regions.push((
// 1GiB ~ 4032 MiB: RAM before the gap
(
layout::RAM_START,
ram_32bit_space_size as usize,
layout::MEM_32BIT_RESERVED_START.unchecked_offset_from(layout::RAM_START) as usize,
RegionType::Ram,
));
// Other memory is placed after 4GiB
regions.push((
layout::RAM_64BIT_START,
(size - ram_32bit_space_size) as usize,
RegionType::Ram,
));
}
// Add the 32-bit reserved memory hole as a reserved region
regions.push((
layout::MEM_32BIT_RESERVED_START,
layout::MEM_32BIT_RESERVED_SIZE as usize,
RegionType::Reserved,
));
regions
),
// 4GiB ~ inf: RAM after the gap
(layout::RAM_64BIT_START, usize::MAX, RegionType::Ram),
// Add the 32-bit reserved memory hole as a reserved region
(
layout::MEM_32BIT_RESERVED_START,
layout::MEM_32BIT_RESERVED_SIZE as usize,
RegionType::Reserved,
),
]
}
/// Configures the system and should be called once per vm before starting vcpu threads.
@@ -214,26 +196,12 @@ mod tests {
use super::*;
#[test]
fn test_arch_memory_regions_dram_2gb() {
let regions = arch_memory_regions((1usize << 31) as u64); //2GB
assert_eq!(5, regions.len());
assert_eq!(layout::RAM_START, regions[3].0);
assert_eq!((1usize << 31), regions[3].1);
assert_eq!(RegionType::Ram, regions[3].2);
assert_eq!(RegionType::Reserved, regions[4].2);
}
#[test]
fn test_arch_memory_regions_dram_4gb() {
let regions = arch_memory_regions((1usize << 32) as u64); //4GB
let ram_32bit_space_size =
layout::MEM_32BIT_RESERVED_START.unchecked_offset_from(layout::RAM_START) as usize;
fn test_arch_memory_regions_dram() {
let regions = arch_memory_regions();
assert_eq!(6, regions.len());
assert_eq!(layout::RAM_START, regions[3].0);
assert_eq!(ram_32bit_space_size, regions[3].1);
assert_eq!(RegionType::Ram, regions[3].2);
assert_eq!(RegionType::Reserved, regions[5].2);
assert_eq!(RegionType::Ram, regions[4].2);
assert_eq!(((1usize << 32) - ram_32bit_space_size), regions[4].1);
}
}