linux-kernel - Re: [PATCH] Allow RDTSC and RDTSCP from userspace

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Message-ID: <20200425122835.GM30814@suse.de>
Date:   Sat, 25 Apr 2020 14:28:35 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Mike Stunes <mstunes@...are.com>
Cc:     joro@...tes.org, dan.j.williams@...el.com,
        dave.hansen@...ux.intel.com, hpa@...or.com, jgross@...e.com,
        jslaby@...e.cz, keescook@...omium.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, luto@...nel.org,
        peterz@...radead.org, thellstrom@...are.com,
        thomas.lendacky@....com, virtualization@...ts.linux-foundation.org,
        x86@...nel.org
Subject: Re: [PATCH] Allow RDTSC and RDTSCP from userspace

Hi Mike,

On Fri, Apr 24, 2020 at 02:03:16PM -0700, Mike Stunes wrote:
> I needed to allow RDTSC(P) from userspace and in early boot in order to
> get userspace started properly. Patch below.

Thanks, but this is not needed anymore. I removed the vc_context_filter
from the code. The emulation code is now capable of safely handling any
exception from user-space.

Regards,

	Joerg