On Wed, 14 Feb 2018 22:06:35 +0100 Oliver Heid <oliver.h...@h-next.de> wrote:
> Regarding the vfio_device_info struct: I get 9 device regions, of which > region 0, 2 and 4 seem to be the three BAR regions. Is that so? Always? > What do the other regions do? This is all answered in the API: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/vfio.h /* * The VFIO-PCI bus driver makes use of the following fixed region and * IRQ index mapping. Unimplemented regions return a size of zero. * Unimplemented IRQ types return a count of zero. */ enum { VFIO_PCI_BAR0_REGION_INDEX, VFIO_PCI_BAR1_REGION_INDEX, VFIO_PCI_BAR2_REGION_INDEX, VFIO_PCI_BAR3_REGION_INDEX, VFIO_PCI_BAR4_REGION_INDEX, VFIO_PCI_BAR5_REGION_INDEX, VFIO_PCI_ROM_REGION_INDEX, VFIO_PCI_CONFIG_REGION_INDEX, /* * Expose VGA regions defined for PCI base class 03, subclass 00. * This includes I/O port ranges 0x3b0 to 0x3bb and 0x3c0 to 0x3df * as well as the MMIO range 0xa0000 to 0xbffff. Each implemented * range is found at it's identity mapped offset from the region * offset, for example 0x3b0 is region_info.offset + 0x3b0. Areas * between described ranges are unimplemented. */ VFIO_PCI_VGA_REGION_INDEX, VFIO_PCI_NUM_REGIONS = 9 /* Fixed user ABI, region indexes >=9 use */ /* device specific cap to define content. */ }; > And by mmap of PCIe config space you mean mapping the files > /sys/bus/pci/devices/0000:xx:yy.z/resource0 ?! No, use the VFIO_PCI_CONFIG_REGION_INDEX region. _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
