Commit faf3bfcb authored by Matthew Rosato's avatar Matthew Rosato Committed by Christian Borntraeger
Browse files

vfio-pci/zdev: add function handle to clp base capability 



The function handle is a system-wide unique identifier for a zPCI
device.  With zPCI instruction interpretation, the host will no
longer be executing the zPCI instructions on behalf of the guest.
As a result, the guest needs to use the real function handle in
order for firmware to associate the instruction with the proper
PCI function.  Let's provide that handle to the guest.

Reviewed-by: default avatarChristian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: default avatarPierre Morel <pmorel@linux.ibm.com>
Signed-off-by: default avatarMatthew Rosato <mjrosato@linux.ibm.com>
Acked-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/r/20220606203325.110625-19-mjrosato@linux.ibm.com


Signed-off-by: default avatarChristian Borntraeger <borntraeger@linux.ibm.com>
parent 8061d1c3

drivers/vfio/pci/vfio_pci_zdev.c

+3 −2
Original line number Diff line number Diff line
@@ -24,14 +24,15 @@ static int zpci_base_cap(struct zpci_dev *zdev, struct vfio_info_cap *caps) 
{

	struct vfio_device_info_cap_zpci_base cap = {

		.header.id = VFIO_DEVICE_INFO_CAP_ZPCI_BASE,

		.header.version = 1,

		.header.version = 2,

		.start_dma = zdev->start_dma,

		.end_dma = zdev->end_dma,

		.pchid = zdev->pchid,

		.vfn = zdev->vfn,

		.fmb_length = zdev->fmb_length,

		.pft = zdev->pft,

		.gid = zdev->pfgid

		.gid = zdev->pfgid,

		.fh = zdev->fh

	};



	return vfio_info_add_capability(caps, &cap.header, sizeof(cap));

include/uapi/linux/vfio_zdev.h

+3 −0
Original line number Diff line number Diff line
@@ -29,6 +29,9 @@ struct vfio_device_info_cap_zpci_base { 
	__u16 fmb_length;	/* Measurement Block Length (in bytes) */

	__u8 pft;		/* PCI Function Type */

	__u8 gid;		/* PCI function group ID */

	/* End of version 1 */

	__u32 fh;		/* PCI function handle */

	/* End of version 2 */

};



/**