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Date: Wed, 1 May 2024 21:15:44 +0100
From: Conor Dooley <conor@kernel.org>
To: Charlie Jenkins <charlie@rivosinc.com>
Cc: Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>, Guo Ren <guoren@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Samuel Holland <samuel@sholland.org>,
	Conor Dooley <conor.dooley@microchip.com>,
	Evan Green <evan@rivosinc.com>,
	=?iso-8859-1?Q?Cl=E9ment_L=E9ger?= <cleger@rivosinc.com>,
	Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org>,
	linux-riscv@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, Palmer Dabbelt <palmer@rivosinc.com>,
	linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev,
	linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v4 07/16] riscv: cpufeature: Extract common elements from
 extension checking
Message-ID: <20240501-hazy-reformist-8ff36ba53450@spud>
References: <20240426-dev-charlie-support_thead_vector_6_9-v4-0-b692f3c516ec@rivosinc.com>
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On Wed, May 01, 2024 at 12:48:13PM -0700, Charlie Jenkins wrote:
> On Wed, May 01, 2024 at 12:37:14PM +0100, Conor Dooley wrote:
> > On Fri, Apr 26, 2024 at 02:29:21PM -0700, Charlie Jenkins wrote:
> > > The __riscv_has_extension_likely() and __riscv_has_extension_unlikely=
()
> > > functions from the vendor_extensions.h can be used to simplify the
> > > standard extension checking code as well. Migrate those functions to
> > > cpufeature.h and reorganize the code in the file to use the functions.
> > >=20
> > > Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
> > > ---
> > >  arch/riscv/include/asm/cpufeature.h        | 78 +++++++++++++++++---=
----------
> > >  arch/riscv/include/asm/vendor_extensions.h | 28 -----------
> > >  2 files changed, 44 insertions(+), 62 deletions(-)
> > >=20
> > > diff --git a/arch/riscv/include/asm/cpufeature.h b/arch/riscv/include=
/asm/cpufeature.h
> > > index fedd479ccfd1..17896ec9ec11 100644
> > > --- a/arch/riscv/include/asm/cpufeature.h
> > > +++ b/arch/riscv/include/asm/cpufeature.h
> > > @@ -98,59 +98,66 @@ extern bool riscv_isa_fallback;
> > > =20
> > >  unsigned long riscv_isa_extension_base(const unsigned long *isa_bitm=
ap);
> > > =20
> > > +#define EXT_ALL_VENDORS		0
> >=20
> > It's not really "all vendors", it's standard. Otherwise, this seems all
>=20
> This hooks up into the alternatives:
>=20
> ALTERNATIVE("nop", "j	%l[l_yes]", %[vendor], %[ext], 1)

Yeah, I know what you're using it for, I just find the naming odd.
>=20
> Where the "vendor" argument is supposed to be 0 if the alternative is
> applicable to all vendors. Is there a better way to convey this?

s/EXT_ALL_VENDORS/STANDARD_EXT/?

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