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tests: Add an integration test to verify PCI device allocations

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This commit adds an integration test to verify that the guest sees the
correct BDF. Moreover, we check that we can allocate a random free BDF
and that freeing BDFs works.

Signed-off-by: Pascal Scholz <pascal.scholz@cyberus-technology.de>
On-behalf-of: SAP pascal.scholz@sap.com
Signed-off-by: Rob Bradford <rbradford@meta.com>
This commit is contained in:
Pascal Scholz
2026-03-26 13:12:15 +01:00
committed by Rob Bradford
parent 8259f92909
commit f82eebc0b0
2 changed files with 164 additions and 0 deletions
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26
cloud-hypervisor/tests/common/utils.rs
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@@ -1033,3 +1033,29 @@ pub(crate) fn make_guest_panic(guest: &Guest) {
// Trigger guest a panic
guest.ssh_command("screen -dmS reboot sh -c \"sleep 5; echo s | tee /proc/sysrq-trigger; echo c | sudo tee /proc/sysrq-trigger\"").unwrap();
}
/// Extracts a BDF from a CHV returned response
pub(crate) fn bdf_from_hotplug_response(
s: &str,
) -> (
u16, /* Segment ID */
u8, /* Bus ID */
u8, /* Device ID */
u8, /* Function ID */
) {
let json: serde_json::Value = serde_json::from_str(s).expect("should be valid JSON");
let bdf_str = json["bdf"]
.as_str()
.expect("should contain string key `bdf`");
// BDF format: "SSSS:BB:DD.F"
let parts: Vec<&str> = bdf_str.split(&[':', '.'][..]).collect();
assert_eq!(parts.len(), 4, "unexpected BDF format: {bdf_str}");
let segment_id = u16::from_str_radix(parts[0], 16).unwrap();
let bus_id = u8::from_str_radix(parts[1], 16).unwrap();
let device_id = u8::from_str_radix(parts[2], 16).unwrap();
let function_id = u8::from_str_radix(parts[3], 16).unwrap();
(segment_id, bus_id, device_id, function_id)
}