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From: Christoph Hellwig <hch@infradead.org>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Christoph Hellwig <hch@infradead.org>,
	Conor Dooley <conor@kernel.org>,
	prabhakar.csengg@gmail.com, Arnd Bergmann <arnd@arndb.de>,
	Conor Dooley <conor.dooley@microchip.com>,
	geert+renesas@glider.be, heiko@sntech.de, guoren@kernel.org,
	ajones@ventanamicro.com, Paul Walmsley <paul.walmsley@sifive.com>,
	aou@eecs.berkeley.edu, samuel@sholland.org,
	linux-riscv@lists.infradead.org, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	biju.das.jz@bp.renesas.com,
	prabhakar.mahadev-lad.rj@bp.renesas.com
Subject: Re: [PATCH v8 0/7] Add non-coherent DMA support for AX45MP
Date: Wed, 19 Apr 2023 23:09:05 -0700	[thread overview]
Message-ID: <ZEDXAV7EJn9MH0Hd@infradead.org> (raw)
In-Reply-To: <mhng-e296c86c-71b1-46f8-88c6-16eda3590a3d@palmer-ri-x1c9>

On Wed, Apr 19, 2023 at 08:59:03AM -0700, Palmer Dabbelt wrote:
> IMO we should just take the support in Linux: trying to hide stuff behind the
> SBI leads to more more headaches than it's worth, we end up with a bunch of
> broken firmware to try and work around.  We've already got a mess here because
> of the D1 support, we might as well just live with it.

I strongly disagree.  Adding more and more per-vendor ops simply does
not scale.  We're getting us into a giant long-time mess that will be
unfixable.

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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Christoph Hellwig <hch@infradead.org>,
	Conor Dooley <conor@kernel.org>,
	prabhakar.csengg@gmail.com, Arnd Bergmann <arnd@arndb.de>,
	Conor Dooley <conor.dooley@microchip.com>,
	geert+renesas@glider.be, heiko@sntech.de, guoren@kernel.org,
	ajones@ventanamicro.com, Paul Walmsley <paul.walmsley@sifive.com>,
	aou@eecs.berkeley.edu, samuel@sholland.org,
	linux-riscv@lists.infradead.org, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	biju.das.jz@bp.renesas.com,
	prabhakar.mahadev-lad.rj@bp.renesas.com
Subject: Re: [PATCH v8 0/7] Add non-coherent DMA support for AX45MP
Date: Wed, 19 Apr 2023 23:09:05 -0700	[thread overview]
Message-ID: <ZEDXAV7EJn9MH0Hd@infradead.org> (raw)
In-Reply-To: <mhng-e296c86c-71b1-46f8-88c6-16eda3590a3d@palmer-ri-x1c9>

On Wed, Apr 19, 2023 at 08:59:03AM -0700, Palmer Dabbelt wrote:
> IMO we should just take the support in Linux: trying to hide stuff behind the
> SBI leads to more more headaches than it's worth, we end up with a bunch of
> broken firmware to try and work around.  We've already got a mess here because
> of the D1 support, we might as well just live with it.

I strongly disagree.  Adding more and more per-vendor ops simply does
not scale.  We're getting us into a giant long-time mess that will be
unfixable.

  reply	other threads:[~2023-04-20  6:09 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
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 [this message]
2023-04-20  6:09         ` Christoph Hellwig

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