From 27b3ebfad48e9253d2c584fd75e9f1380633435a Mon Sep 17 00:00:00 2001
From: Kunhui Li <kunhuix.li@intel.com>
Date: Sun, 16 May 2021 22:28:15 -0400
Subject: [PATCH] Config_tools: config hugepage in sos kenrel cmdline

If there is hugepage support from board xml, config tool will
add hugepagesz=1G hugepages=[size] into sos kernel cmdline,
the size is calculated by memory size in G minusing 3.
The reason for reducing 3 is that it is reserved for SOS VM use.

Tracked-On: #5815
Signed-off-by: Kunhui Li <kunhuix.li@intel.com>
Reviewed-By: Junjie Mao <junjie.mao@intel.com>
---
 misc/config_tools/xforms/misc_cfg.h.xsl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/misc/config_tools/xforms/misc_cfg.h.xsl b/misc/config_tools/xforms/misc_cfg.h.xsl
index 35a37e51c..bd2a384b7 100644
--- a/misc/config_tools/xforms/misc_cfg.h.xsl
+++ b/misc/config_tools/xforms/misc_cfg.h.xsl
@@ -95,6 +95,7 @@
 <xsl:template name="sos_bootargs_diff">
   <xsl:variable name="bootargs" select="normalize-space(vm[acrn:is-sos-vm(vm_type)]/board_private/bootargs[text()])" />
   <xsl:variable name="maxcpunum" select="count(//vm[acrn:is-sos-vm(vm_type)]/cpu_affinity/pcpu_id)" />
+  <xsl:variable name="hugepages" select="round(number(substring-before(//board-data//TOTAL_MEM_INFO, 'kB')) div (1024 * 1024)) - 3" />
   <xsl:variable name="maxcpus">
     <xsl:choose>
       <xsl:when test="$maxcpunum != 0">
@@ -105,7 +106,12 @@
       </xsl:otherwise>
     </xsl:choose>
   </xsl:variable>
-  <xsl:value-of select="acrn:define('SOS_BOOTARGS_DIFF', concat($quot, $bootargs, ' ', $maxcpus, ' ', $quot), '')" />
+  <xsl:variable name="hugepage_kernelstring">
+    <xsl:if test="//board-data//processors//capability[@id='gbyte_pages']">
+      <xsl:value-of select="concat('hugepagesz=1G hugepages=', $hugepages)" />
+    </xsl:if>
+  </xsl:variable>
+  <xsl:value-of select="acrn:define('SOS_BOOTARGS_DIFF', concat($quot, $bootargs, ' ', $maxcpus, ' ', $hugepage_kernelstring, ' ', $quot), '')" />
 </xsl:template>
 
 <xsl:template name="cpu_affinity">