add support for detecting Xen blk & net controllers (mga#9546)

2 files changed, 35 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 2653a8e..b27df4b 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,5 @@
+- add support for detecting Xen blk & net controllers (mga#9546)
+
 Version 0.12.5 - 14 January 2013, Thierry Vignaud
 
 - dynamically resize memory when reaching max devices limit (mga#8320)
diff --git a/pci.c b/pci.c
index c57d6c8..f51f025 100644
--- a/pci.c
+++ b/pci.c
@@ -49,6 +49,37 @@ char* get_pci_description(int vendor_id, int device_id) {
         return buf;
 }
 
+// fake two PCI controllers for xen
+static detect_xen(struct pciusb_entries *r) {
+	struct stat sb;
+	if (stat("/sys/bus/xen", &sb) != 0)
+		return;
+
+	struct pciusb_entry *e = &r->entries[r->nb++];
+	pciusb_initialize(e);
+	asprintf(&e->text, "%s|%s", "XenSource, Inc.", "Block Frontend");
+        e->class_id = 0x0106; // STORAGE_SATA
+
+	e->vendor =  0x1a71; // XenSource
+	e->device =  0xfffa; // fake
+	e->subvendor = 0;
+	e->subdevice = 0;
+	e->class_id = 0x0106;
+	e->module = strdup("xen_blkfront");
+
+	e = &r->entries[r->nb++];
+	pciusb_initialize(e);
+	asprintf(&e->text, "%s|%s", "XenSource, Inc.", "Network Frontend");
+        e->class_id = 0x0200; // NETWORK_ETHERNET
+
+	e->vendor =  0x1a71; // XenSource
+	e->device =  0xfffa; // fake
+	e->subvendor = 0;
+	e->subdevice = 0;
+	e->class_id = 0x0200;
+	e->module = strdup("xen_netfront");
+}
+
 extern struct pciusb_entries pci_probe(void) {
 	u8 buf[CONFIG_SPACE_SIZE];
 	struct pciusb_entries r;
@@ -77,6 +108,8 @@ extern struct pciusb_entries pci_probe(void) {
 	r.nb = 0;
 	r.entries = malloc(sizeof(struct pciusb_entry) * MAX_DEVICES);
 
+	detect_xen(&r);
+
 	for (dev = pacc->devices; dev; dev = dev->next, r.nb++) {
 		if (r.nb >= allocated) {
 			allocated = r.nb*2;