From: Keir Fraser <keir.fraser@citrix.com>
Date: Fri, 11 Jul 2008 11:46:33 +0000 (+0100)
Subject: vt-d: Fix Host Address Width
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14188^2~44
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22Dat/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22Dat?a=commitdiff_plain;h=7acbaf60a917f48fb551b21086d9c6ef34705de6;p=xen.git

vt-d: Fix Host Address Width

Host Address Width of the platform should be computed as N+1,
where N is the value reported in dmar acpi table.

Signed-off-by: Ameya Palande <2ameya@gmail.com>
---

diff --git a/xen/drivers/passthrough/vtd/dmar.c b/xen/drivers/passthrough/vtd/dmar.c
index 7f47b06977..a6876ec6a3 100644
--- a/xen/drivers/passthrough/vtd/dmar.c
+++ b/xen/drivers/passthrough/vtd/dmar.c
@@ -400,7 +400,7 @@ static int __init acpi_parse_dmar(struct acpi_table_header *table)
         return -EINVAL;
     }
 
-    dmar_host_address_width = dmar->width;
+    dmar_host_address_width = dmar->width + 1;
     dprintk(XENLOG_INFO VTDPREFIX, "Host address width %d\n",
             dmar_host_address_width);