[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [v2][PATCH 2/8] pci: provide a way to reserve some specific
From: |
Tiejun Chen |
Subject: |
[Qemu-devel] [v2][PATCH 2/8] pci: provide a way to reserve some specific devfn |
Date: |
Fri, 16 May 2014 18:53:38 +0800 |
Sometime we may need to reserve some specific devfn since
some vgabios or drivers have to work well with a fixed bdf.
Signed-off-by: Tiejun Chen <address@hidden>
---
v2:
* New patch
hw/pci/pci.c | 11 +++++++++++
include/hw/pci/pci.h | 1 +
2 files changed, 12 insertions(+)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index ef944cf..06b0c92 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -813,6 +813,17 @@ static void do_pci_unregister_device(PCIDevice *pci_dev)
memory_region_destroy(&pci_dev->bus_master_enable_region);
}
+
+void pci_reserve_pci_devfn(PCIBus *bus, uint8_t devfn)
+{
+ int ret = test_and_set_bit(devfn, bus->pci_bdf_bitmap);
+ if (ret) {
+ error_report("PCI: %02x:%02x:%02x is not available to reserve.",
+ pci_bus_num(bus), PCI_SLOT(devfn), PCI_FUNC(devfn));
+ return;
+ }
+}
+
/* -1 for devfn means auto assign */
static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
const char *name, int devfn)
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 8c25ae5..cbb174e 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -342,6 +342,7 @@ void pci_bus_new_inplace(PCIBus *bus, size_t bus_size,
DeviceState *parent,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
uint8_t devfn_min, const char *typename);
+void pci_reserve_pci_devfn(PCIBus *bus, uint8_t devfn);
PCIBus *pci_bus_new(DeviceState *parent, const char *name,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
--
1.9.1
- [Qemu-devel] [v2][PATCH 0/8] xen: add Intel IGD passthrough support, Tiejun Chen, 2014/05/16
- [Qemu-devel] [v2][PATCH 1/8] pci: use bitmap to manage registe/runregister pci device, Tiejun Chen, 2014/05/16
- [Qemu-devel] [v2][PATCH 2/8] pci: provide a way to reserve some specific devfn,
Tiejun Chen <=
- [Qemu-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Tiejun Chen, 2014/05/16
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Konrad Rzeszutek Wilk, 2014/05/16
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Chen, Tiejun, 2014/05/19
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Konrad Rzeszutek Wilk, 2014/05/19
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Chen, Tiejun, 2014/05/20
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Stefano Stabellini, 2014/05/19
- Re: [Qemu-devel] [Xen-devel] [v2][PATCH 3/8] xen, gfx passthrough: basic graphics passthrough support, Chen, Tiejun, 2014/05/20
[Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD, Tiejun Chen, 2014/05/16