linux-kernel - Re: framebuffer corruption due to overlapping stp instructions on arm64

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Message-ID: <alpine.LRH.2.02.1808061630380.18304@file01.intranet.prod.int.rdu2.redhat.com>
Date:   Mon, 6 Aug 2018 16:31:18 -0400 (EDT)
From:   Mikulas Patocka <mpatocka@...hat.com>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
cc:     Robin Murphy <robin.murphy@....com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        linux-pci <linux-pci@...r.kernel.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Will Deacon <will.deacon@....com>,
        Russell King <linux@...linux.org.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Matt Sealey <neko@...uhatsu.net>,
        Catalin Marinas <catalin.marinas@....com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: framebuffer corruption due to overlapping stp instructions on
 arm64



On Mon, 6 Aug 2018, Ard Biesheuvel wrote:

> > Unfortunatelly, it doesn't work. I verified that the bit is set after
> > booting Linux, but the memcpy corruption was still present.
> >
> > I also tried the other chicken bits, it slowed down the system noticeably,
> > but had no effect on the memcpy corruption.
> >
> 
> OK, it was worth a shot
> 
> Let's wait and see if Marcin has any results.

BTW. is there documentation for that DesignWare PCIe controller somewhere?

Mikulas