linux-kernel - Re: [PATCH v5] x86/umip: Add emulation/spoofing for SLDT and STR instructions

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Message-ID: <CALCETrU8==gUPD7TygK_dVZZnzirpLUCWQCgYmEDn2s2Y5U_gg@mail.gmail.com>
Date:   Sat, 11 Jul 2020 10:13:51 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Brendan Shanks <bshanks@...eweavers.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, X86 ML <x86@...nel.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Andreas Rammhold <andi@...much.email>,
        "Moger, Babu" <Babu.Moger@....com>
Subject: Re: [PATCH v5] x86/umip: Add emulation/spoofing for SLDT and STR instructions

On Fri, Jul 10, 2020 at 3:45 PM Brendan Shanks <bshanks@...eweavers.com> wrote:
>
> Add emulation/spoofing of SLDT and STR for both 32- and 64-bit
> processes.
>
> Wine users have found a small number of Windows apps using SLDT that
> were crashing when run on UMIP-enabled systems.
>

Acked-by: Andy Lutomirski <luto@...nel.org>

I tested this under KVM-emulated UMIP.  I don't have a real UMIP
system handle to test STR.

--Andy