From: "H. Peter Anvin" <hpa@zytor.com>
To: Andreas Rammhold <andi@notmuch.email>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org,
Ricardo Neri <ricardo.neri-calderon@linux.intel.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Babu Moger <Babu.Moger@amd.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Jason Yan <yanaijie@huawei.com>,
Brendan Shanks <bshanks@codeweavers.com>,
linux-kernel@vger.kernel.org
Subject: Re: umip: AMD Ryzen 3900X, pagefault after emulate SLDT/SIDT instruction
Date: Tue, 19 May 2020 17:17:28 -0700 [thread overview]
Message-ID: <a0f55ad9-f85b-3b2a-e75d-43d4a54063fb@zytor.com> (raw)
In-Reply-To: <20200519143815.cpsd2xfx2kl3khsq@wrt>
On 2020-05-19 07:38, Andreas Rammhold wrote:
> Hi,
>
> I've been running into a weird problem with UMIP on a current Ryzen
> 3900x with kernel 5.6.11 where a process receives a page fault after the
> kernel handled the SLDT (or SIDT) instruction (emulation).
>
> The program I am running is run through WINE in 32bit mode and tries to
> figure out if it is running in a VMWare machine by comparing the results
> of SLDT against well known constants (basically as shown in the
> [example] linked below).
>
Extremely weird. What is it expecting to happen -- or rather, what do you
*want* it to do?
-hpa
prev parent reply other threads:[~2020-05-20 0:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 14:38 Andreas Rammhold
2020-05-19 18:56 ` Brendan Shanks
2020-05-19 19:43 ` Ricardo Neri
2020-05-20 0:54 ` Andy Lutomirski
2020-05-21 0:56 ` Ricardo Neri
2020-05-21 1:16 ` Andy Lutomirski
2020-05-20 1:04 ` andi
2020-05-23 2:17 ` Andreas Rammhold
2020-05-26 13:33 ` Ricardo Neri
2020-05-28 11:36 ` Andreas Rammhold
2020-05-20 1:08 ` andi
2020-05-23 2:21 ` andi
2020-05-20 0:17 ` H. Peter Anvin [this message]
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