linux-kernel - Re: [PATCH v18 6/7] crypto: caam: cleanup CONFIG

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Date:   Tue, 3 Jul 2018 16:40:42 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        linux-ntb@...glegroups.com,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Horia Geantă <horia.geanta@....com>,
        Dan Douglass <dan.douglass@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH v18 6/7] crypto: caam: cleanup CONFIG_64BIT ifdefs when
 using io{read|write}64

On Tue, Jul 3, 2018 at 3:47 PM, Logan Gunthorpe <logang@...tatee.com> wrote:

> Ok, I'm at a bit of a loss... When I look at the assembly before and
> after the patch, it looks pretty much the same. Additionally, the
> function where the undefined exception occurs (caam_jr_interrupt())
> doesn't make any use of wr_reg64 or rd_reg64 which is the only thing the
> patch changes...
>
> Also, it looks like the nonatomic headers are doing what they are
> supposed to on this arch and generating two 32-bit ios and not a 64 bit one.
>
> So I have no idea what's going on here... Are we sure this is the patch
> causing the problem? Did you bisect?

Yes, I am sure that 46e4bf08f6388ba748 is the one causing the kernel boot issue.

If I revert 46e4bf08f6388ba748 in linux-next then I can boot mx6 just fine.

kernelci.org reports also confirm the same:

https://storage.kernelci.org/next/master/next-20180629/arm/imx_v6_v7_defconfig/lab-baylibre-seattle/boot-imx6q-wandboard.html

Thanks