linux-kernel - Re: [PATCH 1/4] riscv: Extend cpufeature.c to detect vendor extensions

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Date: Thu, 16 May 2024 17:09:13 +0100
From: Conor Dooley <conor@...nel.org>
To: Charlie Jenkins <charlie@...osinc.com>
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Evan Green <evan@...osinc.com>, linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] riscv: Extend cpufeature.c to detect vendor
 extensions

On Wed, May 15, 2024 at 02:26:13PM -0700, Charlie Jenkins wrote:
> Instead of grouping all vendor extensions into the same riscv_isa_ext
> that standard instructions use, create a struct
> "riscv_isa_vendor_ext_data_list" that allows each vendor to maintain
> their vendor extensions independently of the standard extensions.
> xandespmu is currently the only vendor extension so that is the only
> extension that is affected by this change.
> 
> An additional benefit of this is that the extensions of each vendor can
> be conditionally enabled. A config RISCV_ISA_VENDOR_EXT_ANDES has been
> added to allow for that.
> 
> Signed-off-by: Charlie Jenkins <charlie@...osinc.com>

Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Cheers,
Conor.

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