From: Roger Pau Monné <roger.pau@citrix.com>
Date: Wed, 1 Apr 2020 10:36:57 +0000 (+0200)
Subject: x86/dom0: fix copy of low 1MB data for PVH
X-Git-Tag: archive/raspbian/4.14.0+80-gd101b417b7-1+rpi1^2~63^2~459
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=3925402f5dd7ae93010c48688eb64f880c794267;p=xen.git

x86/dom0: fix copy of low 1MB data for PVH

The orders of start and end are inverted in order to calculate the
size of the copy operation.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index 2afd44c8a4..12a82c9d7c 100644
--- a/xen/arch/x86/hvm/dom0_build.c
+++ b/xen/arch/x86/hvm/dom0_build.c
@@ -463,7 +463,7 @@ static int __init pvh_populate_p2m(struct domain *d)
             enum hvm_translation_result res =
                  hvm_copy_to_guest_phys(mfn_to_maddr(_mfn(addr)),
                                         mfn_to_virt(addr),
-                                        d->arch.e820[i].addr - end,
+                                        end - d->arch.e820[i].addr,
                                         v);
 
             if ( res != HVMTRANS_okay )