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Xen PV Device

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Introduces a new Xen PV PCI device which will act as a binding point for
PV drivers for Xen.
The device has parameterized vendor-id, device-id and revision to allow to
be configured as a binding point for any vendor's PV drivers.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Paul Durrant 2013-07-29 10:58:01 +00:00 committed by Stefano Stabellini
parent 454ae734f1
commit 8fbab3b62a
4 changed files with 139 additions and 3 deletions
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2
hw/xen/Makefile.objs
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@ -1,6 +1,6 @@
# xen backend driver support
common-obj-$(CONFIG_XEN_BACKEND) += xen_backend.o xen_devconfig.o
obj-$(CONFIG_XEN_I386) += xen_platform.o xen_apic.o
obj-$(CONFIG_XEN_I386) += xen_platform.o xen_apic.o xen_pvdevice.o
obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o

131
hw/xen/xen_pvdevice.c Normal file
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@ -0,0 +1,131 @@
/* Copyright (c) Citrix Systems Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "hw/hw.h"
#include "hw/pci/pci.h"
#include "trace.h"
#define TYPE_XEN_PV_DEVICE "xen-pvdevice"
#define XEN_PV_DEVICE(obj) \
OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)
typedef struct XenPVDevice {
/*< private >*/
PCIDevice parent_obj;
/*< public >*/
uint16_t vendor_id;
uint16_t device_id;
uint8_t revision;
uint32_t size;
MemoryRegion mmio;
} XenPVDevice;
static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
unsigned size)
{
trace_xen_pv_mmio_read(addr);
return ~(uint64_t)0;
}
static void xen_pv_mmio_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
trace_xen_pv_mmio_write(addr);
}
static const MemoryRegionOps xen_pv_mmio_ops = {
.read = &xen_pv_mmio_read,
.write = &xen_pv_mmio_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static int xen_pv_init(PCIDevice *pci_dev)
{
XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
uint8_t *pci_conf;
pci_conf = pci_dev->config;
pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
pci_config_set_prog_interface(pci_conf, 0);
pci_conf[PCI_INTERRUPT_PIN] = 1;
memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
"mmio", d->size);
pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
&d->mmio);
return 0;
}
static Property xen_pv_props[] = {
DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, PCI_DEVICE_ID_XEN_PVDEVICE),
DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
DEFINE_PROP_END_OF_LIST()
};
static void xen_pv_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = xen_pv_init;
k->class_id = PCI_CLASS_SYSTEM_OTHER;
dc->desc = "Xen PV Device";
dc->props = xen_pv_props;
}
static const TypeInfo xen_pv_type_info = {
.name = TYPE_XEN_PV_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(XenPVDevice),
.class_init = xen_pv_class_init,
};
static void xen_pv_register_types(void)
{
type_register_static(&xen_pv_type_info);
}
type_init(xen_pv_register_types)

5
include/hw/pci/pci_ids.h
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@ -143,8 +143,9 @@
#define PCI_DEVICE_ID_INTEL_Q35_MCH 0x29c0
#define PCI_VENDOR_ID_XEN 0x5853
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
#define PCI_VENDOR_ID_XEN 0x5853
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
#define PCI_DEVICE_ID_XEN_PVDEVICE 0x0002
#define PCI_VENDOR_ID_NEC 0x1033
#define PCI_DEVICE_ID_NEC_UPD720200 0x0194

4
trace-events
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@ -1168,3 +1168,7 @@ kvm_run_exit(int cpu_index, uint32_t reason) "cpu_index %d, reason %d"
# qom/object.c
object_dynamic_cast_assert(const char *type, const char *target, const char *file, int line, const char *func) "%s->%s (%s:%d:%s)"
object_class_dynamic_cast_assert(const char *type, const char *target, const char *file, int line, const char *func) "%s->%s (%s:%d:%s)"
# hw/xen/xen_pvdevice.c
xen_pv_mmio_read(uint64_t addr) "WARNING: read from Xen PV Device MMIO space (address %"PRIx64")"
xen_pv_mmio_write(uint64_t addr) "WARNING: write to Xen PV Device MMIO space (address %"PRIx64")"