linux-kernel - Re: [RFC PATCH v5 4/4] x86/acrn: Add hypercall for ACRN guest

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Message-ID: <20190428100309.GA2334@zn.tnic>
Date:   Sun, 28 Apr 2019 12:03:09 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Zhao, Yakui" <yakui.zhao@...el.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "Chen, Jason CJ" <jason.cj.chen@...el.com>
Subject: Re: [RFC PATCH v5 4/4] x86/acrn: Add hypercall for ACRN guest

On Sun, Apr 28, 2019 at 09:56:35AM +0800, Zhao, Yakui wrote:
> Thanks for the reminder about the access width.
> It is 64-bit register. What I said is the "movq", not "movl".
> (I understand that movl is incorrect for 64-bit register).

I didn't say anything about movl. I think what you're trying to say is
that because your inputs like hcall_id and param1/2 are unsigned longs,
you want a 64-bit move.

-- 
Regards/Gruss,
    Boris.

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