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Message-ID: <ZnRpxMfs0Eql87r3@alpha.franken.de>
Date: Thu, 20 Jun 2024 19:41:24 +0200
From: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To: Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: Jonas Gorski <jonas.gorski@...il.com>,
"Maciej W. Rozycki" <macro@...am.me.uk>,
"linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] MIPS: Introduce config options for LLSC
availability
On Thu, Jun 20, 2024 at 05:30:48PM +0100, Jiaxun Yang wrote:
>
>
> 在2024年6月20日六月 下午5:06,Thomas Bogendoerfer写道:
> [...]
> > do you have an user manual stating that the R5k bug is fixed on this CPUs ?
>
> I actually investigated R5500 a little bit.
>
> There is no explicit document mentioned this bug is fixed on R5500, but it's not
> mentioned on "VR Series 64-/32-Bit Microprocessor Programming Guide" [1] either,
> while some other hardware limitations are mentioned in that guide.
>
> Plus EMMA platform, which was removed form the kernel, doesn't have
> cpu-feature-overrides.h. This means that the platform was running with LLSC
> enabled.
>
> So I think this CPU is not affected.
found a preliminary datasheet and it supports your thinking;-)
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
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