[Xen-changelog] [xen master] x86: drop register reload from INT80 malicious MSI guard

[patchbot@xxxxxxx]

commit a4b4d3d5a89c61baab042a8972676b6b4f30a9a4
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Mon Feb 22 17:23:08 2016 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Feb 22 17:23:08 2016 +0100

    x86: drop register reload from INT80 malicious MSI guard
    
    None of the restored registers are actually of interest to the
    subsequent code (as opposed to the similar construct on the compat
    mode hypercall path).
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/x86_64/entry.S | 1 -
 1 file changed, 1 deletion(-)

diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S
index e0f5c83..dd7f114 100644
--- a/xen/arch/x86/x86_64/entry.S
+++ b/xen/arch/x86/x86_64/entry.S
@@ -286,7 +286,6 @@ ENTRY(int80_direct_trap)
 UNLIKELY_START(ne, msi_check)
         movl  $0x80,%edi
         call  check_for_unexpected_msi
-        LOAD_C_CLOBBERED
 UNLIKELY_END(msi_check)
 
         GET_CURRENT(%rbx)
--
generated by git-patchbot for /home/xen/git/xen.git#master

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