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hypervisor: Add translate_gva for x86/KVM

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This commit adds `translate_gva` for x86/KVM. The same name function is
already implemented for MSHV, but the implementation differs as
KVM_TRANSLATE does not take the flag argument and does not return status
code. This change requires the newer version of kvm-ioctls [1].

[1]
97ff779b6e

Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit is contained in:
Akira Moroo 2022-02-20 11:44:25 +09:00 committed by Rob Bradford
parent 7c6bdf8804
commit 603ca0e21b
2 changed files with 19 additions and 1 deletions
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2
hypervisor/src/cpu.rs
View File

@ -457,7 +457,7 @@ pub trait Vcpu: Send + Sync {
/// Triggers the running of the current virtual CPU returning an exit reason.
///
fn run(&self) -> std::result::Result<VmExit, HypervisorCpuError>;
#[cfg(all(feature = "mshv", target_arch = "x86_64"))]
#[cfg(target_arch = "x86_64")]
///
/// Translate guest virtual address to guest physical address
///

18
hypervisor/src/kvm/mod.rs
View File

@ -981,6 +981,24 @@ impl cpu::Vcpu for KvmVcpu {
.set_xcrs(xcrs)
.map_err(|e| cpu::HypervisorCpuError::SetXcsr(e.into()))
}
#[cfg(target_arch = "x86_64")]
///
/// Translates guest virtual address to guest physical address using the `KVM_TRANSLATE` ioctl.
///
fn translate_gva(&self, gva: u64, _flags: u64) -> cpu::Result<(u64, u32)> {
let tr = self
.fd
.translate_gva(gva)
.map_err(|e| cpu::HypervisorCpuError::TranslateVirtualAddress(e.into()))?;
// tr.valid is set if the GVA is mapped to valid GPA.
match tr.valid {
0 => Err(cpu::HypervisorCpuError::TranslateVirtualAddress(anyhow!(
"Invalid GVA: {:#x}",
gva
))),
_ => Ok((tr.physical_address, 0)),
}
}
///
/// Triggers the running of the current virtual CPU returning an exit reason.
///