linux-kernel - Re: [PATCH] KVM: fix mov immediate emulation for 64-bit operands

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Message-Id: <C814BCA3-145A-410F-8F4F-CE5617DDB1A2@gmail.com>
Date:	Sun, 8 Jan 2012 02:30:39 +0200
From:	Nadav Amit <nadav.amit@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: fix mov immediate emulation for 64-bit operands


On Jan 7, 2012, at 10:25 PM, H. Peter Anvin wrote:

> On 01/07/2012 12:21 PM, Nadav Amit wrote:
>> MOV immediate instruction (opcodes 0xB8-0xBF) may take 64-bit operand.
>> The previous emulation implementation assumes the operand is no longer than 32.
>> 
>> Signed-off-by: Nadav Amit <nadav.amit@...il.com>
> 
> There are exactly two such instructions: MOV immediate (B8-BF) and MOV
> moff (A0-A3); you may want to check the latter too.
> 
> 	-hpa
> 

These instructions (A0-A3) seem to be already covered by the decode_abs function.

Regards,
Nadav--
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