linux-kernel - [PATCH v4 16/32] vfio-pci/zdev: add function handle to clp base capability

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Date:   Mon, 14 Mar 2022 15:44:35 -0400
From:   Matthew Rosato <mjrosato@...ux.ibm.com>
To:     linux-s390@...r.kernel.org
Cc:     alex.williamson@...hat.com, cohuck@...hat.com,
        schnelle@...ux.ibm.com, farman@...ux.ibm.com, pmorel@...ux.ibm.com,
        borntraeger@...ux.ibm.com, hca@...ux.ibm.com, gor@...ux.ibm.com,
        gerald.schaefer@...ux.ibm.com, agordeev@...ux.ibm.com,
        svens@...ux.ibm.com, frankja@...ux.ibm.com, david@...hat.com,
        imbrenda@...ux.ibm.com, vneethv@...ux.ibm.com,
        oberpar@...ux.ibm.com, freude@...ux.ibm.com, thuth@...hat.com,
        pasic@...ux.ibm.com, joro@...tes.org, will@...nel.org,
        pbonzini@...hat.com, corbet@....net, jgg@...dia.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        iommu@...ts.linux-foundation.org, linux-doc@...r.kernel.org
Subject: [PATCH v4 16/32] vfio-pci/zdev: add function handle to clp base capability

The function handle is a system-wide unique identifier for a zPCI
device.  It is used as input for various zPCI operations.

Signed-off-by: Matthew Rosato <mjrosato@...ux.ibm.com>
---
 drivers/vfio/pci/vfio_pci_zdev.c | 5 +++--
 include/uapi/linux/vfio_zdev.h   | 3 +++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci_zdev.c b/drivers/vfio/pci/vfio_pci_zdev.c
index ea4c0d2b0663..4a653ce480c7 100644
--- a/drivers/vfio/pci/vfio_pci_zdev.c
+++ b/drivers/vfio/pci/vfio_pci_zdev.c
@@ -23,14 +23,15 @@ 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));
diff --git a/include/uapi/linux/vfio_zdev.h b/include/uapi/linux/vfio_zdev.h
index b4309397b6b2..78c022af3d29 100644
--- a/include/uapi/linux/vfio_zdev.h
+++ b/include/uapi/linux/vfio_zdev.h
@@ -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 */
 };
 
 /**
-- 
2.27.0