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authorGustavo Padovan <gustavo.padovan@collabora.co.uk>2016-08-11 12:26:44 -0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-08-15 16:41:46 +0200
commit35538d7822e86cb38015c21bb708a433f8814af0 (patch)
tree36aa2ccfe355aa93ad345715988a36ceba2498ea /drivers/dma-buf/Kconfig
parentfc0c9a03b57efb769a74fa8b33d68d90153b5950 (diff)
downloadlinux-35538d7822e86cb38015c21bb708a433f8814af0.tar.bz2
dma-buf/sw_sync: de-stage SW_SYNC
SW_SYNC allows to run tests on the sync_file framework via debugfs on <debugfs>/sync/sw_sync Opening and closing the file triggers creation and release of a sync timeline. To create fences on this timeline the SW_SYNC_IOC_CREATE_FENCE ioctl should be used. To increment the timeline value use SW_SYNC_IOC_INC. Also it exports Sync information on <debugfs>/sync/info Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/dma-buf/Kconfig')
-rw-r--r--drivers/dma-buf/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig
index 25bcfa0b474f..2585821b24ab 100644
--- a/drivers/dma-buf/Kconfig
+++ b/drivers/dma-buf/Kconfig
@@ -17,4 +17,17 @@ config SYNC_FILE
Files fds, to the DRM driver for example. More details at
Documentation/sync_file.txt.
+config SW_SYNC
+ bool "Sync File Validation Framework"
+ default n
+ depends on SYNC_FILE
+ depends on DEBUG_FS
+ ---help---
+ A sync object driver that uses a 32bit counter to coordinate
+ synchronization. Useful when there is no hardware primitive backing
+ the synchronization.
+
+ WARNING: improper use of this can result in deadlocking kernel
+ drivers from userspace. Intended for test and debug only.
+
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