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authorRyan Grimm <grimm@linux.vnet.ibm.com>2015-01-19 11:52:49 -0600
committerMichael Ellerman <mpe@ellerman.id.au>2015-01-22 17:31:51 +1100
commit95bc11bcd1428afdb48400ec84dc6d5a83926138 (patch)
tree3831e60e399dd4e2f4e90b3bc358e2fdbd90ef59 /Documentation/ABI
parent4beb5421babee1204757b877622830c6aa31be6d (diff)
downloadop-kernel-dev-95bc11bcd1428afdb48400ec84dc6d5a83926138.zip
op-kernel-dev-95bc11bcd1428afdb48400ec84dc6d5a83926138.tar.gz
cxl: Add image control to sysfs
load_image_on_perst identifies whether a PERST will cause the image to be flashed to the card. And if so, which image. Valid entries are: "none", "user" and "factory". A value of "none" means PERST will not cause the image to be flashed. A power cycle to the pcie slot is required to load the image. "user" loads the user provided image and "factory" loads the factory image upon PERST. sysfs updates the cxl struct in the driver then calls cxl_update_image_control to write the vals in the VSEC. Signed-off-by: Ryan Grimm <grimm@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-class-cxl14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-cxl b/Documentation/ABI/testing/sysfs-class-cxl
index 2ab9752..5941ff3 100644
--- a/Documentation/ABI/testing/sysfs-class-cxl
+++ b/Documentation/ABI/testing/sysfs-class-cxl
@@ -132,3 +132,17 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Will return "user" or "factory" depending on the image loaded
onto the card.
+
+What: /sys/class/cxl/<card>/load_image_on_perst
+Date: December 2014
+Contact: linuxppc-dev@lists.ozlabs.org
+Description: read/write
+ Valid entries are "none", "user", and "factory".
+ "none" means PERST will not cause image to be loaded to the
+ card. A power cycle is required to load the image.
+ "none" could be useful for debugging because the trace arrays
+ are preserved.
+ "user" and "factory" means PERST will cause either the user or
+ user or factory image to be loaded.
+ Default is to reload on PERST whichever image the card has
+ loaded.
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