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Date: Thu, 23 Sep 2021 20:05:28 +0800 From: Guo Ren <guoren@...nel.org> To: Nick Kossifidis <mick@....forth.gr> Cc: Philipp Tomsich <philipp.tomsich@...ll.eu>, Anup Patel <anup@...infault.org>, Anup Patel <anup.patel@....com>, Atish Patra <atish.patra@....com>, Palmer Dabbelt <palmerdabbelt@...gle.com>, Christoph Müllner <christoph.muellner@...ll.eu>, Christoph Hellwig <hch@....de>, liush <liush@...winnertech.com>, wefu@...hat.com, Wei Wu (吴伟) <lazyparser@...il.com>, Drew Fustini <drew@...gleboard.org>, linux-riscv <linux-riscv@...ts.infradead.org>, "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>, taiten.peng@...onical.com, aniket.ponkshe@...onical.com, Heinrich Schuchardt <heinrich.schuchardt@...onical.com>, gordan.markus@...onical.com, Guo Ren <guoren@...ux.alibaba.com>, Arnd Bergmann <arnd@...db.de>, Chen-Yu Tsai <wens@...e.org>, Maxime Ripard <maxime@...no.tech>, Daniel Lustig <dlustig@...dia.com>, Greg Favor <gfavor@...tanamicro.com>, Andrea Mondelli <andrea.mondelli@...wei.com>, Jonathan Behrens <behrensj@....edu>, Xinhaoqu <xinhaoqu@...wei.com>, Bill Huffman <huffman@...ence.com>, Allen Baum <allen.baum@...erantotech.com>, Josh Scheid <jscheid@...tanamicro.com>, Richard Trauben <rtrauben@...il.com> Subject: Re: [PATCH] riscv: Add RISC-V svpbmt extension On Thu, Sep 23, 2021 at 6:09 PM Nick Kossifidis <mick@....forth.gr> wrote: > > Στις 2021-09-23 13:04, Philipp Tomsich έγραψε: > > > > How if we expand this to a mmu subnode in cpu@x and add a booleans for > > adornments like svnapot and svpbmt? > > The older mmu-type could then treated to indicate a mmu w/o any > > adornments specified. I am aware that this generates an additional > > parsing-path that will be maintained, but it will allow future > > properties to be grouped. > > > > cpu@0 { > > ... > > mmu { > > type = "riscv,sv39"; > > supports-svpbmt; > > } > > ... > > } > > I was about to propose the same thing, we can do this now without > breaking backwards compatibility, we don't really use mmu-type property > at this point, we are either sv39 or nommu. It should be another patch. -- Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/
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