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mshv: Do not register ioevents in case of SEV-SNP enabled guest #6162

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merged 2 commits into from Feb 13, 2024
Merged

mshv: Do not register ioevents in case of SEV-SNP enabled guest #6162

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9a05490
hypervisor: Add a flag to identify sev-snp VM
jinankjain Feb 5, 2024
bddd132
hypervisor: Do not register ioevent for SEV-SNP
jinankjain Feb 5, 2024
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9 changes: 9 additions & 0 deletions hypervisor/src/mshv/mod.rs
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Expand Up @@ -299,6 +299,8 @@ impl hypervisor::Hypervisor for MshvHypervisor {
fd: vm_fd,
msrs,
dirty_log_slots: Arc::new(RwLock::new(HashMap::new())),
#[cfg(feature = "sev_snp")]
sev_snp_enabled: mshv_vm_type == VmType::Snp,
}))
}

Expand Down Expand Up @@ -1460,6 +1462,8 @@ pub struct MshvVm {
fd: Arc<VmFd>,
msrs: Vec<MsrEntry>,
dirty_log_slots: Arc<RwLock<HashMap<u64, MshvDirtyLogSlot>>>,
#[cfg(feature = "sev_snp")]
sev_snp_enabled: bool,
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}

impl MshvVm {
Expand Down Expand Up @@ -1579,6 +1583,11 @@ impl vm::Vm for MshvVm {
addr: &IoEventAddress,
datamatch: Option<DataMatch>,
) -> vm::Result<()> {
#[cfg(feature = "sev_snp")]
if self.sev_snp_enabled {
return Ok(());
}

let addr = &mshv_ioctls::IoEventAddress::from(*addr);
debug!(
"register_ioevent fd {} addr {:x?} datamatch {:?}",
Expand Down