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authorScott Wood <scottwood@freescale.com>2015-10-06 22:48:19 -0500
committerScott Wood <scottwood@freescale.com>2015-10-27 18:13:29 -0500
commit567cf94dc7801f6602a73b55f04cb096a3c351fb (patch)
tree0ac4a9d508651f2dbb93d90ed2d5f999ff10b9af /Documentation/devicetree/bindings/chosen.txt
parentcf904e3088fd3760d9f6fed5fde755ac299590b7 (diff)
powerpc/book3e-64/kexec: Enable SMP release
The SMP release mechanism for FSL book3e is different from when booting with normal hardware. In theory we could simulate the normal spin table mechanism, but not at the addresses U-Boot put in the device tree -- so there'd need to be even more communication between the kernel and kexec to set that up. Instead, kexec-tools will set a boolean property linux,booted-from-kexec in the /chosen node. Signed-off-by: Scott Wood <scottwood@freescale.com> Cc: devicetree@vger.kernel.org
Diffstat (limited to 'Documentation/devicetree/bindings/chosen.txt')
-rw-r--r--Documentation/devicetree/bindings/chosen.txt8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt
index ed838f453f7a..6ae9d82d4c37 100644
--- a/Documentation/devicetree/bindings/chosen.txt
+++ b/Documentation/devicetree/bindings/chosen.txt
@@ -44,3 +44,11 @@ Implementation note: Linux will look for the property "linux,stdout-path" or
on PowerPC "stdout" if "stdout-path" is not found. However, the
"linux,stdout-path" and "stdout" properties are deprecated. New platforms
should only use the "stdout-path" property.
+
+linux,booted-from-kexec
+-----------------------
+
+This property is set (currently only on PowerPC, and only needed on
+book3e) by some versions of kexec-tools to tell the new kernel that it
+is being booted by kexec, as the booting environment may differ (e.g.
+a different secondary CPU release mechanism)