linux-kernel - [PATCH RFC 15/15] dmaengine: idxd: add ABI documentation for mediated device support

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Date:   Tue, 21 Apr 2020 16:35:21 -0700
From:   Dave Jiang <dave.jiang@...el.com>
To:     vkoul@...nel.org, megha.dey@...ux.intel.com, maz@...nel.org,
        bhelgaas@...gle.com, rafael@...nel.org, gregkh@...uxfoundation.org,
        tglx@...utronix.de, hpa@...or.com, alex.williamson@...hat.com,
        jacob.jun.pan@...el.com, ashok.raj@...el.com, jgg@...lanox.com,
        yi.l.liu@...el.com, baolu.lu@...el.com, kevin.tian@...el.com,
        sanjay.k.kumar@...el.com, tony.luck@...el.com, jing.lin@...el.com,
        dan.j.williams@...el.com, kwankhede@...dia.com,
        eric.auger@...hat.com, parav@...lanox.com
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        x86@...nel.org, linux-pci@...r.kernel.org, kvm@...r.kernel.org
Subject: [PATCH RFC 15/15] dmaengine: idxd: add ABI documentation for
 mediated device support

From: Jing Lin <jing.lin@...el.com>

Add the sysfs attribute bits in ABI/stable for mediated deivce and guest
support.

Signed-off-by: Jing Lin <jing.lin@...el.com>
Signed-off-by: Dave Jiang <dave.jiang@...el.com>
---
 Documentation/ABI/stable/sysfs-driver-dma-idxd |   18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd
index c1adddde23c2..b04cbc5a1827 100644
--- a/Documentation/ABI/stable/sysfs-driver-dma-idxd
+++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd
@@ -76,6 +76,12 @@ Date:		Jan 30, 2020
 KernelVersion:	5.7.0
 Contact:	dmaengine@...r.kernel.org
 Description:	To indicate if PASID (process address space identifier) is
+
+What:           sys/bus/dsa/devices/dsa<m>/ims_size
+Date:           Apr 13, 2020
+KernelVersion:  5.8.0
+Contact:        dmaengine@...r.kernel.org
+Description:	Number of entries in the interrupt message storage table.
 		enabled or not for this device.
 
 What:           sys/bus/dsa/devices/dsa<m>/state
@@ -141,8 +147,16 @@ Date:           Oct 25, 2019
 KernelVersion:  5.6.0
 Contact:        dmaengine@...r.kernel.org
 Description:    The type of this work queue, it can be "kernel" type for work
-		queue usages in the kernel space or "user" type for work queue
-		usages by applications in user space.
+		queue usages in the kernel space, "user" type for work queue
+		usages by applications in user space, or "mdev" type for
+		VFIO mediated devices.
+
+What:           sys/bus/dsa/devices/wq<m>.<n>/uuid
+Date:           Apr 13, 2020
+KernelVersion:  5.8.0
+Contact:        dmaengine@...r.kernel.org
+Description:    The uuid attached to this work queue when the mediated device is
+		created.
 
 What:           sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
 Date:           Oct 25, 2019