linux-kernel - Re: [PATCH 19/62] x86/sev-es: Add support for handling IOIO exceptions

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Message-ID: <CALCETrWecBK7cqgLTB72mMYRs10R1e+rkZh9mnzRNJc0N=XU2Q@mail.gmail.com>
Date:   Tue, 11 Feb 2020 14:28:06 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     Joerg Roedel <joro@...tes.org>
Cc:     X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Jiri Slaby <jslaby@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Juergen Gross <jgross@...e.com>,
        Kees Cook <keescook@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kvm list <kvm@...r.kernel.org>,
        Linux Virtualization <virtualization@...ts.linux-foundation.org>,
        Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH 19/62] x86/sev-es: Add support for handling IOIO exceptions

On Tue, Feb 11, 2020 at 5:53 AM Joerg Roedel <joro@...tes.org> wrote:
>
> From: Tom Lendacky <thomas.lendacky@....com>
>
> Add support for decoding and handling #VC exceptions for IOIO events.
>
> Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
> [ jroedel@...e.de: Adapted code to #VC handling framework ]
> Co-developed-by: Joerg Roedel <jroedel@...e.de>
> Signed-off-by: Joerg Roedel <jroedel@...e.de>

It would be nice if this could reuse the existing in-kernel
instruction decoder.  Is there some reason it can't?

--Andy