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From: Christoph Hellwig <hch@infradead.org>
To: Conor Dooley <conor@kernel.org>
Cc: Prabhakar <prabhakar.csengg@gmail.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Conor Dooley <conor.dooley@microchip.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Heiko Stuebner <heiko@sntech.de>, Guo Ren <guoren@kernel.org>,
	Andrew Jones <ajones@ventanamicro.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Samuel Holland <samuel@sholland.org>,
	linux-riscv@lists.infradead.org, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org,
	Biju Das <biju.das.jz@bp.renesas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: Re: [PATCH v8 0/7] Add non-coherent DMA support for AX45MP
Date: Sun, 16 Apr 2023 23:53:17 -0700	[thread overview]
Message-ID: <ZDzs3eYIKPFcv0HQ@infradead.org> (raw)
In-Reply-To: <20230412-populate-busybody-4c6d7cfc4667@spud>

On Wed, Apr 12, 2023 at 09:32:30PM +0100, Conor Dooley wrote:
> On Wed, Apr 12, 2023 at 12:08:53PM +0100, Prabhakar wrote:
> 
> > Note,
> > - This series requires testing on Cores with zicbom and T-Head SoCs
> 
> As I said last time, I dunno what actual Zicbom stuff exists, other than
> perhaps the Ventana lads having something. I did some tyre kicking on my
> D1 and it was fine, although nothing has actually changed materially for
> either of them with this series in v8..

And as saying before, there is absolutely no reason to add non-standard
non-coherent DMA support and let this cancer creep.  If you want Linux
support implement Zicbom, be that in hardware or the SBI.

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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Conor Dooley <conor@kernel.org>
Cc: Prabhakar <prabhakar.csengg@gmail.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Conor Dooley <conor.dooley@microchip.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Heiko Stuebner <heiko@sntech.de>, Guo Ren <guoren@kernel.org>,
	Andrew Jones <ajones@ventanamicro.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Samuel Holland <samuel@sholland.org>,
	linux-riscv@lists.infradead.org, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org,
	Biju Das <biju.das.jz@bp.renesas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: Re: [PATCH v8 0/7] Add non-coherent DMA support for AX45MP
Date: Sun, 16 Apr 2023 23:53:17 -0700	[thread overview]
Message-ID: <ZDzs3eYIKPFcv0HQ@infradead.org> (raw)
In-Reply-To: <20230412-populate-busybody-4c6d7cfc4667@spud>

On Wed, Apr 12, 2023 at 09:32:30PM +0100, Conor Dooley wrote:
> On Wed, Apr 12, 2023 at 12:08:53PM +0100, Prabhakar wrote:
> 
> > Note,
> > - This series requires testing on Cores with zicbom and T-Head SoCs
> 
> As I said last time, I dunno what actual Zicbom stuff exists, other than
> perhaps the Ventana lads having something. I did some tyre kicking on my
> D1 and it was fine, although nothing has actually changed materially for
> either of them with this series in v8..

And as saying before, there is absolutely no reason to add non-standard
non-coherent DMA support and let this cancer creep.  If you want Linux
support implement Zicbom, be that in hardware or the SBI.

  reply	other threads:[~2023-04-17  6:53 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-12 11:08 [PATCH v8 0/7] Add non-coherent DMA support for AX45MP Prabhakar
2023-04-12 11:08 ` Prabhakar
2023-04-12 11:08 ` [PATCH v8 1/7] riscv: asm: alternative-macros: Introduce ALTERNATIVE_3() macro Prabhakar
2023-04-12 11:08   ` Prabhakar
2023-04-12 11:08 ` [PATCH v8 2/7] riscv: asm: vendorid_list: Add Andes Technology to the vendors list Prabhakar
2023-04-12 11:08   ` Prabhakar
2023-04-17  8:52   ` Geert Uytterhoeven
2023-04-17  8:52     ` Geert Uytterhoeven
2023-04-12 11:08 ` [PATCH v8 3/7] riscv: errata: Add Andes alternative ports Prabhakar
2023-04-12 11:08   ` Prabhakar
2023-04-12 11:08 ` [PATCH v8 4/7] dt-bindings: cache: andestech,ax45mp-cache: Add DT binding documentation for L2 cache controller Prabhakar
2023-04-12 11:08   ` Prabhakar
2023-04-12 11:08 ` [PATCH v8 5/7] cache: Add L2 cache management for Andes AX45MP RISC-V core Prabhakar
2023-04-12 11:08   ` Prabhakar
2023-04-12 20:25   ` Conor Dooley
2023-04-12 20:25     ` Conor Dooley
2023-04-13  7:06     ` Conor Dooley
2023-04-13  7:06       ` Conor Dooley
2023-04-13 18:26       ` Lad, Prabhakar
2023-04-13 18:26         ` Lad, Prabhakar
2023-04-13 18:46         ` Conor Dooley
2023-04-13 18:46           ` Conor Dooley
2023-04-13 21:06           ` Lad, Prabhakar
2023-04-13 21:06             ` Lad, Prabhakar
2023-04-14 18:59             ` Lad, Prabhakar
2023-04-14 18:59               ` Lad, Prabhakar
2023-04-12 11:08 ` [PATCH v8 6/7] riscv: errata: Hookup the Andes AX45MP non-coherent handling Prabhakar
2023-04-12 11:08   ` Prabhakar
2023-04-12 20:29   ` Conor Dooley
2023-04-12 20:29     ` Conor Dooley
2023-04-12 11:09 ` [PATCH v8 7/7] soc: renesas: Kconfig: Select the required configs for RZ/Five SoC Prabhakar
2023-04-12 11:09   ` Prabhakar
2023-04-12 20:32 ` [PATCH v8 0/7] Add non-coherent DMA support for AX45MP Conor Dooley
2023-04-12 20:32   ` Conor Dooley
2023-04-17  6:53   ` Christoph Hellwig [this message]
2023-04-17  6:53     ` Christoph Hellwig
2023-04-19 15:59     ` Palmer Dabbelt
2023-04-19 15:59       ` Palmer Dabbelt
2023-04-20  6:09       ` Christoph Hellwig
2023-04-20  6:09         ` Christoph Hellwig

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