linux-kernel - Re: remove arch/sh

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <9FC76FF3-9DD4-48E2-BC39-479A50B40C1D@gmail.com>
Date:   Tue, 17 Jan 2023 19:10:25 -0500
From:   "D. Jeff Dionne" <djeffdionne@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Rob Landley <rob@...dley.net>, Christoph Hellwig <hch@....de>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arch@...r.kernel.org,
        dmaengine@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-renesas-soc@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-input@...r.kernel.org, linux-media@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        netdev@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-rtc@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-fbdev@...r.kernel.org, alsa-devel@...a-project.org,
        linux-sh@...r.kernel.org
Subject: Re: remove arch/sh


> Since there are people around with real hardware .... is sh in big endian mode
> (sheb) real ? Its qemu support is quite limited; most PCI devices don't work
> due to endianness issues. It would be interesting to know if this works better
> with real hardware.

Hi Guenter,

SH big endian works very well, and is in use on J-Core J2 SMP (hardware w/FPGA, simulation and ASIC this year) as well as some of the Hitachi / Renesas IoT chips e.g. SH7619.

It’s the base of the real new line of development (as opposed to backward looking support of older SH chips).  New chipsets will be based on the same RTL.

But does it actually work?  Yes, we have (new) devices such as a USB Wireguard based VPN hardware dongle, that are J2 (SH2 2 core SMP) that are in use with Linux sheb, nommu and fdpic.  MMU chips will be little endian.

Cheers,
J.

> Thanks,
> Guenter
>