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List:       xen-devel
Subject:    [PATCH] x86/dom0: fix copy of low 1MB data for PVH
From:       Roger Pau Monne <roger.pau () citrix ! com>
Date:       2020-03-31 16:33:02
Message-ID: 20200331163302.60617-1-roger.pau () citrix ! com
[Download RAW message or body]

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>
---
 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 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 )
-- 
2.26.0


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