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authorMichael S. Tsirkin <mst@redhat.com>2009-07-27 16:37:48 -0400
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-09-09 16:29:24 -0400
commit711d57796f5ce2d02d6e62c9034afbb16aedda31 (patch)
tree935861fee775b171cafc96de57fe4fbfa19892eb /Documentation/ABI
parent5228a828ee044834d78abdf25306bf46b19dcc4d (diff)
PCI: expose function reset capability in sysfs
Some devices allow an individual function to be reset without affecting other functions in the same device: that's what pci_reset_function does. For devices that have this support, expose reset attribite in sysfs. This is useful e.g. for virtualization, where a qemu userspace process wants to reset the device when the guest is reset, to emulate machine reboot as closely as possible. Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-pci10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 6bf68053e4b8..25be3250f7d6 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -84,6 +84,16 @@ Description:
84 from this part of the device tree. 84 from this part of the device tree.
85 Depends on CONFIG_HOTPLUG. 85 Depends on CONFIG_HOTPLUG.
86 86
87What: /sys/bus/pci/devices/.../reset
88Date: July 2009
89Contact: Michael S. Tsirkin <mst@redhat.com>
90Description:
91 Some devices allow an individual function to be reset
92 without affecting other functions in the same device.
93 For devices that have this support, a file named reset
94 will be present in sysfs. Writing 1 to this file
95 will perform reset.
96
87What: /sys/bus/pci/devices/.../vpd 97What: /sys/bus/pci/devices/.../vpd
88Date: February 2008 98Date: February 2008
89Contact: Ben Hutchings <bhutchings@solarflare.com> 99Contact: Ben Hutchings <bhutchings@solarflare.com>