On Wed, 7 Oct 2020 14:56:19 -0400 Matthew Rosato <mjrosato@xxxxxxxxxxxxx> wrote: > This patchset provides a means by which hardware information about the > underlying PCI device can be passed up to userspace (ie, QEMU) so that > this hardware information can be used rather than previously hard-coded > assumptions. The VFIO_DEVICE_GET_INFO ioctl is extended to allow capability > chains and zPCI devices provide the hardware information via capabilities. > > A form of these patches saw some rounds last year but has been back- > tabled for a while. The original work for this feature was done by Pierre > Morel. I'd like to refresh the discussion on this and get this finished up > so that we can move forward with better-supporting additional types of > PCI-attached devices. > > This feature is toggled via the CONFIG_VFIO_PCI_ZDEV configuration entry. > > Changes since v2: > - Added ACKs (thanks!) > - Patch 3+4: Re-write to use VFIO_DEVICE_GET_INFO capabilities rather than > a vfio device region. Looks good to me, I'll let Connie and others double check and throw in their reviews, but I'll plan to include this for v5.10. Thanks, Alex > Matthew Rosato (5): > s390/pci: stash version in the zpci_dev > s390/pci: track whether util_str is valid in the zpci_dev > vfio: Introduce capability definitions for VFIO_DEVICE_GET_INFO > vfio-pci/zdev: Add zPCI capabilities to VFIO_DEVICE_GET_INFO > MAINTAINERS: Add entry for s390 vfio-pci > > MAINTAINERS | 8 ++ > arch/s390/include/asm/pci.h | 4 +- > arch/s390/pci/pci_clp.c | 2 + > drivers/vfio/pci/Kconfig | 13 ++++ > drivers/vfio/pci/Makefile | 1 + > drivers/vfio/pci/vfio_pci.c | 37 ++++++++++ > drivers/vfio/pci/vfio_pci_private.h | 12 +++ > drivers/vfio/pci/vfio_pci_zdev.c | 143 ++++++++++++++++++++++++++++++++++++ > include/uapi/linux/vfio.h | 11 +++ > include/uapi/linux/vfio_zdev.h | 78 ++++++++++++++++++++ > 10 files changed, 308 insertions(+), 1 deletion(-) > create mode 100644 drivers/vfio/pci/vfio_pci_zdev.c > create mode 100644 include/uapi/linux/vfio_zdev.h >
