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vmm: Handle TDX hypercalls with INVALID_OPERAND

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Based on the helpers from the hypervisor crate, the VMM can identify
what type of hypercall has been issued through the KVM_EXIT_TDX reason.

For now, we only log warnings and set the status to INVALID_OPERAND
since these hypercalls aren't supported. The proper handling will be
implemented later.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2022-02-18 11:12:33 +01:00
parent cb844ecd1d
commit 0ac094c0d1
1 changed files with 27 additions and 1 deletions
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28
vmm/src/cpu.rs
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@ -31,6 +31,8 @@ use hypervisor::kvm::kvm_bindings;
#[cfg(target_arch = "x86_64")]
use hypervisor::CpuId;
use hypervisor::{vm::VmmOps, CpuState, HypervisorCpuError, VmExit};
#[cfg(feature = "tdx")]
use hypervisor::{TdxExitDetails, TdxExitStatus};
use libc::{c_void, siginfo_t};
use seccompiler::{apply_filter, SeccompAction};
use std::collections::BTreeMap;
@ -881,8 +883,12 @@ impl CpuManager {
break;
}
#[cfg(feature = "tdx")]
let mut vcpu = vcpu.lock().unwrap();
#[cfg(not(feature = "tdx"))]
let vcpu = vcpu.lock().unwrap();
// vcpu.run() returns false on a triple-fault so trigger a reset
match vcpu.lock().unwrap().run() {
match vcpu.run() {
Ok(run) => match run {
#[cfg(target_arch = "x86_64")]
VmExit::IoapicEoi(vector) => {
@ -909,6 +915,26 @@ impl CpuManager {
exit_evt.write(1).unwrap();
break;
}
#[cfg(feature = "tdx")]
VmExit::Tdx => {
if let Some(vcpu_fd) = Arc::get_mut(&mut vcpu.vcpu) {
match vcpu_fd.get_tdx_exit_details() {
Ok(details) => match details {
TdxExitDetails::GetQuote => warn!("TDG_VP_VMCALL_GET_QUOTE not supported"),
TdxExitDetails::SetupEventNotifyInterrupt => {
warn!("TDG_VP_VMCALL_SETUP_EVENT_NOTIFY_INTERRUPT not supported")
}
},
Err(e) => error!("Unexpected TDX VMCALL: {}", e),
}
vcpu_fd.set_tdx_status(TdxExitStatus::InvalidOperand);
} else {
// We should never reach this code as
// this means the design from the code
// is wrong.
unreachable!("Couldn't get a mutable reference from Arc<dyn Vcpu> as there are multiple instances");
}
}
_ => {
error!(
"VCPU generated error: {:?}",