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SubjectRe: [PATCH v3 0/5] Pass zPCI hardware information via VFIO
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On 10/7/20 2:56 PM, Matthew Rosato 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.

Link to latest QEMU patch set:
https://lists.gnu.org/archive/html/qemu-devel/2020-10/msg01948.html

>
> 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
>

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