[PATCH v6 02/11] xen/arm: add iounmap after initrd has been loaded in domain_build

From: Wei Chen <wei.chen@arm.com>
To: <xen-devel@lists.xenproject.org>
Cc: <nd@arm.com>, Wei Chen <wei.chen@arm.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Julien Grall <julien@xen.org>,
	Bertrand Marquis <bertrand.marquis@arm.com>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: [PATCH v6 02/11] xen/arm: add iounmap after initrd has been loaded in domain_build
Date: Fri, 4 Nov 2022 18:07:32 +0800	[thread overview]
Message-ID: <20221104100741.2176307-3-wei.chen@arm.com> (raw)
In-Reply-To: <20221104100741.2176307-1-wei.chen@arm.com>

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>
---
 xen/arch/arm/domain_build.c | 2 ++
 1 file changed, 2 insertions(+)

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);
 }
 
 /*
-- 
2.25.1


