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hypervisor: transform between UserMemoryRegion and hypervisor structs

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Signed-off-by: Dev Rajput <t-devrajput@microsoft.com>
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu
2022-07-08 21:18:31 +00:00
committed by Rob Bradford
parent fabc940b65
commit 5894b5370c
2 changed files with 98 additions and 0 deletions
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49
hypervisor/src/mshv/mod.rs
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@@ -23,6 +23,9 @@ use vm::DataMatch;
#[cfg(target_arch = "x86_64")]
pub mod x86_64;
use crate::device;
use crate::{
UserMemoryRegion, USER_MEMORY_REGION_EXECUTE, USER_MEMORY_REGION_READ, USER_MEMORY_REGION_WRITE,
};
use vmm_sys_util::eventfd::EventFd;
#[cfg(target_arch = "x86_64")]
pub use x86_64::VcpuMshvState as CpuState;
@@ -47,6 +50,52 @@ pub use {
pub const PAGE_SHIFT: usize = 12;
impl From<mshv_user_mem_region> for UserMemoryRegion {
fn from(region: mshv_user_mem_region) -> Self {
let mut flags: u32 = 0;
if region.flags & HV_MAP_GPA_READABLE != 0 {
flags |= USER_MEMORY_REGION_READ;
}
if region.flags & HV_MAP_GPA_WRITABLE != 0 {
flags |= USER_MEMORY_REGION_WRITE;
}
if region.flags & HV_MAP_GPA_EXECUTABLE != 0 {
flags |= USER_MEMORY_REGION_EXECUTE;
}
UserMemoryRegion {
guest_phys_addr: (region.guest_pfn << PAGE_SHIFT as u64)
+ (region.userspace_addr & ((1 << PAGE_SHIFT) - 1)),
memory_size: region.size,
userspace_addr: region.userspace_addr,
flags,
..Default::default()
}
}
}
impl From<UserMemoryRegion> for mshv_user_mem_region {
fn from(region: UserMemoryRegion) -> Self {
let mut flags: u32 = 0;
if region.flags & USER_MEMORY_REGION_READ != 0 {
flags |= HV_MAP_GPA_READABLE;
}
if region.flags & USER_MEMORY_REGION_WRITE != 0 {
flags |= HV_MAP_GPA_WRITABLE;
}
if region.flags & USER_MEMORY_REGION_EXECUTE != 0 {
flags |= HV_MAP_GPA_EXECUTABLE;
}
mshv_user_mem_region {
guest_pfn: region.guest_phys_addr >> PAGE_SHIFT,
size: region.memory_size,
userspace_addr: region.userspace_addr,
flags,
}
}
}
#[derive(Debug, Default, Copy, Clone, Serialize, Deserialize)]
pub struct HvState {
hypercall_page: u64,