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agent: Run check_ap_device() for VFIO-AP coldplug

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This commit updates the device handler to call check_ap_device()
instead of wait_for_ap_device() for VFIO-AP coldplug.
The handler now returns a SpecUpdate for passthrough devices if
the device is online (e.g., `/sys/devices/ap/card05/05.001f/online`
is set to 1).

Signed-off-by: Hyounggyu Choi <Hyounggyu.Choi@ibm.com>
This commit is contained in:
Hyounggyu Choi
2025-01-21 13:54:00 +01:00
parent 200cbfd0b0
commit 47db9b3773
1 changed files with 45 additions and 3 deletions
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48
src/agent/src/device/vfio_device_handler.rs
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@@ -12,7 +12,9 @@ use crate::pci;
use crate::sandbox::Sandbox;
use crate::uevent::{wait_for_uevent, Uevent, UeventMatcher};
use anyhow::{anyhow, Context, Result};
use kata_types::device::{DRIVER_VFIO_AP_TYPE, DRIVER_VFIO_PCI_GK_TYPE, DRIVER_VFIO_PCI_TYPE};
use kata_types::device::{
DRIVER_VFIO_AP_COLD_TYPE, DRIVER_VFIO_AP_TYPE, DRIVER_VFIO_PCI_GK_TYPE, DRIVER_VFIO_PCI_TYPE,
};
use protocols::agent::Device;
use slog::Logger;
use std::ffi::OsStr;
@@ -94,7 +96,7 @@ impl DeviceHandler for VfioPciDeviceHandler {
impl DeviceHandler for VfioApDeviceHandler {
#[instrument]
fn driver_types(&self) -> &[&str] {
&[DRIVER_VFIO_AP_TYPE]
&[DRIVER_VFIO_AP_TYPE, DRIVER_VFIO_AP_COLD_TYPE]
}
#[cfg(target_arch = "s390x")]
@@ -103,7 +105,16 @@ impl DeviceHandler for VfioApDeviceHandler {
// Force AP bus rescan
fs::write(AP_SCANS_PATH, "1")?;
for apqn in device.options.iter() {
wait_for_ap_device(ctx.sandbox, ap::Address::from_str(apqn)?).await?;
let ap_address = ap::Address::from_str(apqn).context("Failed to parse AP address")?;
match device.type_.as_str() {
DRIVER_VFIO_AP_TYPE => {
wait_for_ap_device(ctx.sandbox, ap_address).await?;
}
DRIVER_VFIO_AP_COLD_TYPE => {
check_ap_device(ctx.sandbox, ap_address).await?;
}
_ => return Err(anyhow!("Unsupported AP device type: {}", device.type_)),
}
}
let dev_update = Some(DevUpdate::new(Z9_CRYPT_DEV_PATH, Z9_CRYPT_DEV_PATH)?);
Ok(SpecUpdate {
@@ -201,6 +212,37 @@ async fn wait_for_ap_device(sandbox: &Arc<Mutex<Sandbox>>, address: ap::Address)
Ok(())
}
#[cfg(target_arch = "s390x")]
#[instrument]
async fn check_ap_device(sandbox: &Arc<Mutex<Sandbox>>, address: ap::Address) -> Result<()> {
let ap_path = format!(
"/sys/{}/card{:02x}/{}/online",
AP_ROOT_BUS_PATH, address.adapter_id, address
);
if !Path::new(&ap_path).is_file() {
return Err(anyhow!(
"AP device online file not found or not accessible: {}",
ap_path
));
}
match fs::read_to_string(&ap_path) {
Ok(content) => {
let is_online = content.trim() == "1";
if !is_online {
return Err(anyhow!("AP device {} exists but is not online", address));
}
}
Err(e) => {
return Err(anyhow!(
"Failed to read online status for AP device {}: {}",
address,
e
));
}
}
Ok(())
}
pub async fn wait_for_pci_device(
sandbox: &Arc<Mutex<Sandbox>>,
pcipath: &pci::Path,