[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH V5 06/10] pci.c: Add pci_check_bar_overlap
From: |
Anthony PERARD |
Subject: |
[Qemu-devel] [PATCH V5 06/10] pci.c: Add pci_check_bar_overlap |
Date: |
Thu, 24 Nov 2011 17:44:35 +0000 |
From: Yuji Shimada <address@hidden>
This function help Xen PCI Passthrough device to check for overlap.
Signed-off-by: Yuji Shimada <address@hidden>
Signed-off-by: Anthony PERARD <address@hidden>
---
hw/pci.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
hw/pci.h | 3 +++
2 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/hw/pci.c b/hw/pci.c
index 399227f..563bb37 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -2038,3 +2038,50 @@ MemoryRegion *pci_address_space_io(PCIDevice *dev)
{
return dev->bus->address_space_io;
}
+
+int pci_check_bar_overlap(PCIDevice *dev,
+ pcibus_t addr, pcibus_t size, uint8_t type)
+{
+ PCIBus *bus = dev->bus;
+ PCIDevice *devices = NULL;
+ PCIIORegion *r;
+ int i, j;
+ int rc = 0;
+
+ /* check Overlapped to Base Address */
+ for (i = 0; i < ARRAY_SIZE(bus->devices); i++) {
+ devices = bus->devices[i];
+ if (!devices) {
+ continue;
+ }
+
+ /* skip itself */
+ if (devices->devfn == dev->devfn) {
+ continue;
+ }
+
+ for (j = 0; j < PCI_NUM_REGIONS; j++) {
+ r = &devices->io_regions[j];
+
+ /* skip different resource type, but don't skip when
+ * prefetch and non-prefetch memory are compared.
+ */
+ if (type != r->type) {
+ if (type == PCI_BASE_ADDRESS_SPACE_IO ||
+ r->type == PCI_BASE_ADDRESS_SPACE_IO) {
+ continue;
+ }
+ }
+
+ if ((addr < (r->addr + r->size)) && ((addr + size) > r->addr)) {
+ printf("Overlapped to device[%02x:%02x.%x][Region:%d]"
+ "[Address:%"PRIx64"h][Size:%"PRIx64"h]\n",
+ pci_bus_num(bus), PCI_SLOT(devices->devfn),
+ PCI_FUNC(devices->devfn), j, r->addr, r->size);
+ rc = 1;
+ }
+ }
+ }
+
+ return rc;
+}
diff --git a/hw/pci.h b/hw/pci.h
index 625e717..9a723d2 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -552,4 +552,7 @@ static inline void pci_dma_sglist_init(QEMUSGList *qsg,
PCIDevice *dev,
qemu_sglist_init(qsg, alloc_hint);
}
+int pci_check_bar_overlap(PCIDevice *dev,
+ pcibus_t addr, pcibus_t size, uint8_t type);
+
#endif
--
Anthony PERARD
- [Qemu-devel] [PATCH V5 00/10] Xen PCI Passthrough, Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 01/10] pci_ids: Add INTEL_82599_VF id., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 03/10] pci_regs: Add PCI_EXP_TYPE_PCIE_BRIDGE, Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 02/10] pci_regs: Fix value of PCI_EXP_TYPE_RC_EC., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 04/10] configure: Introduce --enable-xen-pci-passthrough., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 05/10] Introduce HostPCIDevice to access a pci device on the host., Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 06/10] pci.c: Add pci_check_bar_overlap,
Anthony PERARD <=
- [Qemu-devel] [PATCH V5 09/10] Introduce apic-msidef.h, Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 07/10] Introduce Xen PCI Passthrough, qdevice (1/3), Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 08/10] Introduce Xen PCI Passthrough, PCI config space helpers (2/3), Anthony PERARD, 2011/11/24
- [Qemu-devel] [PATCH V5 10/10] Introduce Xen PCI Passthrough, MSI (3/3), Anthony PERARD, 2011/11/24