diff mbox

[kvm-unit-tests,v7,08/13] pci: Add pci_dev_exists()

Message ID 01567cb1d1635cc6cb7d853d2c79f38267f88afe.1471434672.git.agordeev@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Alexander Gordeev Aug. 17, 2016, 12:07 p.m. UTC 
Cc: Thomas Huth <thuth@redhat.com>
Cc: Andrew Jones <drjones@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
---
 lib/pci.c | 6 ++++++
 lib/pci.h | 1 +
 2 files changed, 7 insertions(+)
diff mbox

Patch

diff --git a/lib/pci.c b/lib/pci.c
index 7650da9ffaf2..8dea915662d5 100644
--- a/lib/pci.c
+++ b/lib/pci.c
@@ -7,6 +7,12 @@ 
 #include "pci.h"
 #include "asm/pci.h"
 
+bool pci_dev_exists(pcidevaddr_t dev)
+{
+	return (pci_config_readw(dev, PCI_VENDOR_ID) != 0xffff &&
+		pci_config_readw(dev, PCI_DEVICE_ID) != 0xffff);
+}
+
 /* Scan bus look for a specific device. Only bus 0 scanned for now. */
 pcidevaddr_t pci_find_dev(uint16_t vendor_id, uint16_t device_id)
 {
diff --git a/lib/pci.h b/lib/pci.h
index 1c20308c9344..1462aa2f0e1a 100644
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -15,6 +15,7 @@  enum {
 	PCIDEVADDR_INVALID = 0xffff,
 };
 
+extern bool pci_dev_exists(pcidevaddr_t dev);
 extern pcidevaddr_t pci_find_dev(uint16_t vendor_id, uint16_t device_id);
 
 /*