From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH 20/21] KVM: x86: MOVNTI emulation min opsize is not respected
Date: Wed, 05 Nov 2014 13:18:59 +0100
Message-ID: <545A15B3.9020608@redhat.com>
References: <1414922101-17626-1-git-send-email-namit@cs.technion.ac.il> <1414922101-17626-21-git-send-email-namit@cs.technion.ac.il>
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Cc: kvm@vger.kernel.org, nadav.amit@gmail.com
To: Nadav Amit <namit@cs.technion.ac.il>
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On 02/11/2014 10:55, Nadav Amit wrote:
> Commit 3b32004a66e9 ("KVM: x86: movnti minimum op size of 32-bit is not kept")
> did not fully fix the minimum operand size of MONTI emulation. Still, MOVNTI
> may be mistakenly performed using 16-bit opsize.
> 
> This patch add No16 flag to mark an instruction does not support 16-bits
> operand size.

So a

    .byte 0x66
    movntiw (%esi), %eax

will zero the higher two bytes of %eax before this patch, and load 4
bytes from (%esi) after?

Paolo