[xen stable-4.13] x86/dom0: fix copy of low 1MB data for PVH

[patchbot@xxxxxxx]

commit 71b7eadb0b5ed0f6aade8e05dcdefa3d3fee8e88
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Thu Apr 9 09:18:56 2020 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Apr 9 09:18:56 2020 +0200

    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@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: 3925402f5dd7ae93010c48688eb64f880c794267
    master date: 2020-04-01 12:36:57 +0200
---
 xen/arch/x86/hvm/dom0_build.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index 9a46005494..78042bd702 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 )
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.13