From d7ed86141dfed993c15bc0d81dce0426169a176f Mon Sep 17 00:00:00 2001
From: Xenia Ragiadakou
Date: Sun, 19 Jun 2022 15:43:16 +0300
Subject: uboot-script-gen: Enable direct mapping of statically allocated
 memory

Direct mapping for dom0less VMs is disabled by default in XEN and can be
enabled through the 'direct-map' property.
Add a new config parameter DOMU_DIRECT_MAP to be able to enable or disable
direct mapping, i.e set to 1 for enabling and to 0 for disabling.
This parameter is optional. Direct mapping is enabled by default for all
dom0less VMs with static allocation.

The property 'direct-map' is a boolean property. Boolean properties are true
if present and false if missing.
Add a new data_type 'bool' in function dt_set() to setup a boolean property.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
 scripts/uboot-script-gen | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'scripts/uboot-script-gen')

diff --git a/scripts/uboot-script-gen b/scripts/uboot-script-gen
index bdc8a6b..e85c6ec 100755
--- a/scripts/uboot-script-gen
+++ b/scripts/uboot-script-gen
@@ -27,6 +27,7 @@ function dt_mknode()
 #   hex
 #   str
 #   str_a
+#   bool
 function dt_set()
 {
     local path=$1
@@ -49,6 +50,12 @@ function dt_set()
                 array+=" \"$element\""
             done
             echo "fdt set $path $var $array" >> $UBOOT_SOURCE
+        elif test $data_type = "bool"
+        then
+            if test "$data" -eq 1
+            then
+                echo "fdt set $path $var" >> $UBOOT_SOURCE
+            fi
         else
             echo "fdt set $path $var \"$data\"" >> $UBOOT_SOURCE
         fi
@@ -65,6 +72,12 @@ function dt_set()
         elif test $data_type = "str_a"
         then
             fdtput $FDTEDIT -p -t s $path $var $data
+        elif test $data_type = "bool"
+        then
+            if test "$data" -eq 1
+            then
+                fdtput $FDTEDIT -p $path $var
+            fi
         else
             fdtput $FDTEDIT -p -t s $path $var "$data"
         fi
@@ -206,6 +219,7 @@ function xen_device_tree_editing()
         if test "${DOMU_STATIC_MEM[$i]}"
         then
             add_device_tree_static_mem "/chosen/domU$i" "${DOMU_STATIC_MEM[$i]}"
+            dt_set "/chosen/domU$i" "direct-map" "bool" "${DOMU_DIRECT_MAP[$i]}"
         fi
         dt_set "/chosen/domU$i" "vpl011" "hex" "0x1"
         if test "$DOM0_KERNEL"
@@ -470,6 +484,10 @@ function xen_config()
         then
             DOMU_CMD[$i]="console=ttyAMA0"
         fi
+        if test -z "${DOMU_DIRECT_MAP[$i]}"
+        then
+             DOMU_DIRECT_MAP[$i]=1
+        fi
         i=$(( $i + 1 ))
     done
 }
-- 
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