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Date: Tue, 19 May 2020 17:17:28 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Andreas Rammhold <andi@...much.email>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, x86@...nel.org, Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>, Babu Moger <Babu.Moger@....com>, Kefeng Wang <wangkefeng.wang@...wei.com>, Jason Yan <yanaijie@...wei.com>, Brendan Shanks <bshanks@...eweavers.com>, linux-kernel@...r.kernel.org Subject: Re: umip: AMD Ryzen 3900X, pagefault after emulate SLDT/SIDT instruction 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
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