Thread (34 messages) 34 messages, 10 authors, 2020-06-20

Re: [PATCH v8 5/5] dt-bindings: chosen: Document linux,low-memory-range for arm64 kdump

From: Rob Herring <robh+dt@kernel.org>
Date: 2020-05-21 13:29:31
Also in: kexec, linux-arm-kernel, linux-doc, lkml

On Thu, May 21, 2020 at 3:35 AM Chen Zhou [off-list ref] wrote:
Add documentation for DT property used by arm64 kdump:
linux,low-memory-range.
"linux,low-memory-range" is an another memory region used for crash
dump kernel devices.

Signed-off-by: Chen Zhou <redacted>
---
 Documentation/devicetree/bindings/chosen.txt | 25 ++++++++++++++++++++
 1 file changed, 25 insertions(+)
chosen is now a schema documented here[1].
quoted hunk ↗ jump to hunk
diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt
index 45e79172a646..bfe6fb6976e6 100644
--- a/Documentation/devicetree/bindings/chosen.txt
+++ b/Documentation/devicetree/bindings/chosen.txt
@@ -103,6 +103,31 @@ While this property does not represent a real hardware, the address
 and the size are expressed in #address-cells and #size-cells,
 respectively, of the root node.

+linux,low-memory-range
+----------------------
+This property (arm64 only) holds a base address and size, describing a
+limited region below 4G. Similar to "linux,usable-memory-range", it is
+an another memory range which may be considered available for use by the
+kernel.
Why can't you just add a range to "linux,usable-memory-range"? It
shouldn't be hard to figure out which part is below 4G.

Rob

[1] https://github.com/devicetree-org/dt-schema/blob/master/schemas/chosen.yaml
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help