From: Wei Chen <wei.chen@arm.com>
Date: Fri, 4 Nov 2022 10:07:32 +0000 (+0800)
Subject: xen/arm: add iounmap after initrd has been loaded in domain_build
X-Git-Tag: archive/raspbian/4.17.0-1+rpi1^2~33^2~37
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=e61a78981364925a43c9cc24dc77b62ff7b93c9f;p=xen.git

xen/arm: add iounmap after initrd has been loaded in domain_build

domain_build use ioremap_wc to map a new non-cacheable virtual
address for initrd. After Xen copy initrd from this address to
guest, this new allocated virtual address has not been unmapped.

So in this patch, we add an iounmap to the end of domain_build,
after Xen loaded initrd to guest memory.

Signed-off-by: Wei Chen <wei.chen@arm.com>
Release-acked-by: Henry Wang <Henry.Wang@arm.com>
Acked-by: Julien Grall <jgrall@amazon.com>
---

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 4fb5c20b13..bd30d3798c 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -3418,6 +3418,8 @@ static void __init initrd_load(struct kernel_info *kinfo)
                                           initrd, len);
     if ( res != 0 )
         panic("Unable to copy the initrd in the hwdom memory\n");
+
+    iounmap(initrd);
 }
 
 /*