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hi,
I want to pass through "01:00.0",declared as pci=['01:00.0']
in cfg file. but found error log
"pt_iomul_init: Error: pt_iomul_init
can't open file /dev/xen/pci_iomul: No such file or directory:
0x1:0x0.0x0". in qemu-dm-example.hvm.log
In fact, /dev/xen/pci_iomul
does not exist.
So where /dev/xen/pci_iomul implemented ?
I have searched
xen and linux code, found nothing. where pci_iomul device's
code implemented ?
I check tools/qemu-xen-traditional/hw/pass-through.c. and
found pt_iomul_init is called if CONFIG_STUBDOM not defined.
so should
CONFIG_STUBDOM be defined ?
Below is part of pass-through.c.
#ifndef CONFIG_STUBDOM
#define PCI_IOMUL_DEV_PATH
"/dev/xen/pci_iomul"
static void pt_iomul_init(struct pt_dev
*assigned_device,
uint8_t r_bus, uint8_t r_dev, uint8_t r_func)
{
int fd
= PCI_IOMUL_INVALID_FD;
struct pci_iomul_setup setup =
{
.segment =
0,
.bus =
r_bus,
.dev =
r_dev,
.func =
r_func,
};
fd = open(PCI_IOMUL_DEV_PATH,
O_RDWR);
if ( fd < 0 )
{
PT_LOG("Error: %s can't open
file %s: %s:
0x%x:0x%x.0x%x\n",
__func__, PCI_IOMUL_DEV_PATH,
strerror(errno),
r_bus, r_dev, r_func);
fd =
PCI_IOMUL_INVALID_FD;
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