path: root/Documentation
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authorLinus Torvalds <torvalds@linux-foundation.org>2020-02-05 17:44:14 +0000
committerLinus Torvalds <torvalds@linux-foundation.org>2020-02-05 17:44:14 +0000
commitd271ab29230b1d0ceb426f374c221c4eb2c91c64 (patch)
tree9c97e0196c5c1bab8bfbee95a052dbfd0fd0d6d2 /Documentation
parentMerge tag 'devicetree-fixes-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux (diff)
parentxen/blkback: Consistently insert one empty line between functions (diff)
Merge tag 'for-linus-5.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from Juergen Gross: - fix a bug introduced in 5.5 in the Xen gntdev driver - fix the Xen balloon driver when running on ancient Xen versions - allow Xen stubdoms to control interrupt enable flags of passed-through PCI cards - release resources in Xen backends under memory pressure * tag 'for-linus-5.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/blkback: Consistently insert one empty line between functions xen/blkback: Remove unnecessary static variable name prefixes xen/blkback: Squeeze page pools if a memory pressure is detected xenbus/backend: Protect xenbus callback with lock xenbus/backend: Add memory pressure handler callback xen/gntdev: Do not use mm notifiers with autotranslating guests xen/balloon: Support xend-based toolstack take two xen-pciback: optionally allow interrupt enable flag writes
Diffstat (limited to 'Documentation')
2 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-pciback b/Documentation/ABI/testing/sysfs-driver-pciback
index 6a733bfa37e6..73308c2b81b0 100644
--- a/Documentation/ABI/testing/sysfs-driver-pciback
+++ b/Documentation/ABI/testing/sysfs-driver-pciback
@@ -11,3 +11,16 @@ Description:
#echo 00:19.0-E0:2:FF > /sys/bus/pci/drivers/pciback/quirks
will allow the guest to read and write to the configuration
register 0x0E.
+What: /sys/bus/pci/drivers/pciback/allow_interrupt_control
+Date: Jan 2020
+KernelVersion: 5.6
+Contact: xen-devel@lists.xenproject.org
+ List of devices which can have interrupt control flag (INTx,
+ MSI, MSI-X) set by a connected guest. It is meant to be set
+ only when the guest is a stubdomain hosting device model (qemu)
+ and the actual device is assigned to a HVM. It is not safe
+ (similar to permissive attribute) to set for a devices assigned
+ to a PV guest. The device is automatically removed from this
+ list when the connected pcifront terminates.
diff --git a/Documentation/ABI/testing/sysfs-driver-xen-blkback b/Documentation/ABI/testing/sysfs-driver-xen-blkback
index 4e7babb3ba1f..ecb7942ff146 100644
--- a/Documentation/ABI/testing/sysfs-driver-xen-blkback
+++ b/Documentation/ABI/testing/sysfs-driver-xen-blkback
@@ -25,3 +25,13 @@ Description:
allocated without being in use. The time is in
seconds, 0 means indefinitely long.
The default is 60 seconds.
+What: /sys/module/xen_blkback/parameters/buffer_squeeze_duration_ms
+Date: December 2019
+KernelVersion: 5.6
+Contact: SeongJae Park <sjpark@amazon.de>
+ When memory pressure is reported to blkback this option
+ controls the duration in milliseconds that blkback will not
+ cache any page not backed by a grant mapping.
+ The default is 10ms.