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hypervisor: mshv: Add new memory region flag

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GPA_MAP_ADJUSTABLE suggests hypervisor to adjust GPA permissions as
required.

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
This commit is contained in:
Jinank Jain 2024-02-07 13:07:50 +05:30 committed by Rob Bradford
parent 035c4b20fb
commit 321d6f47e6
2 changed files with 10 additions and 2 deletions
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1
hypervisor/src/lib.rs
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@ -134,6 +134,7 @@ pub const USER_MEMORY_REGION_READ: u32 = 1;
pub const USER_MEMORY_REGION_WRITE: u32 = 1 << 1;
pub const USER_MEMORY_REGION_EXECUTE: u32 = 1 << 2;
pub const USER_MEMORY_REGION_LOG_DIRTY: u32 = 1 << 3;
pub const USER_MEMORY_REGION_ADJUSTABLE: u32 = 1 << 4;
#[derive(Debug)]
pub enum MpState {

11
hypervisor/src/mshv/mod.rs
View File

@ -31,7 +31,8 @@ use snp_constants::*;
use crate::{
ClockData, CpuState, IoEventAddress, IrqRoutingEntry, MpState, UserMemoryRegion,
USER_MEMORY_REGION_EXECUTE, USER_MEMORY_REGION_READ, USER_MEMORY_REGION_WRITE,
USER_MEMORY_REGION_ADJUSTABLE, USER_MEMORY_REGION_EXECUTE, USER_MEMORY_REGION_READ,
USER_MEMORY_REGION_WRITE,
};
#[cfg(feature = "sev_snp")]
use igvm_defs::IGVM_VHS_SNP_ID_BLOCK;
@ -73,6 +74,9 @@ impl From<mshv_user_mem_region> for UserMemoryRegion {
if region.flags & HV_MAP_GPA_EXECUTABLE != 0 {
flags |= USER_MEMORY_REGION_EXECUTE;
}
if region.flags & HV_MAP_GPA_ADJUSTABLE != 0 {
flags |= USER_MEMORY_REGION_ADJUSTABLE;
}
UserMemoryRegion {
guest_phys_addr: (region.guest_pfn << PAGE_SHIFT as u64)
@ -97,6 +101,9 @@ impl From<UserMemoryRegion> for mshv_user_mem_region {
if region.flags & USER_MEMORY_REGION_EXECUTE != 0 {
flags |= HV_MAP_GPA_EXECUTABLE;
}
if region.flags & USER_MEMORY_REGION_ADJUSTABLE != 0 {
flags |= HV_MAP_GPA_ADJUSTABLE;
}
mshv_user_mem_region {
guest_pfn: region.guest_phys_addr >> PAGE_SHIFT,
@ -1658,7 +1665,7 @@ impl vm::Vm for MshvVm {
readonly: bool,
_log_dirty_pages: bool,
) -> UserMemoryRegion {
let mut flags = HV_MAP_GPA_READABLE | HV_MAP_GPA_EXECUTABLE;
let mut flags = HV_MAP_GPA_READABLE | HV_MAP_GPA_EXECUTABLE | HV_MAP_GPA_ADJUSTABLE;
if !readonly {
flags |= HV_MAP_GPA_WRITABLE;
}