Re: [RFC PATCH] x86/insn: support decode MOVSXD instruction for MMIO

[Wu Zongyong]

On Thu, Mar 30, 2023 at 03:39:51PM +0300, kirill.shutemov@xxxxxxxxxxxxxxx wrote:
> On Wed, Mar 29, 2023 at 10:59:37AM +0800, Wu Zongyong wrote:
> > It seems MOVSXD which opcode is 0x63 is not handled, support
> > to decode it in insn_decode_mmio().
> 
> Do you have a particular user in mind?
To be honest, I don't find a specific user which uses the MOVSXD.

But both Intel and AMD's instructions reference contains MOVSXD and lots
of MOVSXD instructions occur when I "objdump -S vmlinux", so I think it
may be useful to support it in insn_decode_mmio().

Are there some special consideration about this instruction?

> 
> -- 
>   Kiryl Shutsemau / Kirill A. Shutemov