linux-kernel - Re: [PATCH v3 06/17] riscv: Fix extension subset checking

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Message-ID: <20240424-wildly-goofy-c81aac6f8cd7@spud>
Date: Wed, 24 Apr 2024 15:51:54 +0100
From: Conor Dooley <conor@...nel.org>
To: Alexandre Ghiti <alex@...ti.fr>
Cc: Charlie Jenkins <charlie@...osinc.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Guo Ren <guoren@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Evan Green <evan@...osinc.com>,
	Clément Léger <cleger@...osinc.com>,
	Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>,
	linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...osinc.com>,
	linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
	linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v3 06/17] riscv: Fix extension subset checking

On Wed, Apr 24, 2024 at 04:22:02PM +0200, Alexandre Ghiti wrote:
> Hi Charlie,
> 
> On 21/04/2024 03:04, Charlie Jenkins wrote:
> > This loop is supposed to check if ext->subset_ext_ids[j] is valid, rather
> > than if ext->subset_ext_ids[i] is valid, before setting the extension
> > id ext->subset_ext_ids[j] in isainfo->isa.
> > 
> > Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
> > Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> > Fixes: 0d8295ed975b ("riscv: add ISA extension parsing for scalar crypto")
> > ---
> >   arch/riscv/kernel/cpufeature.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
> > index 48874aac4871..b537731cadef 100644
> > --- a/arch/riscv/kernel/cpufeature.c
> > +++ b/arch/riscv/kernel/cpufeature.c
> > @@ -609,7 +609,7 @@ static int __init riscv_fill_hwcap_from_ext_list(unsigned long *isa2hwcap)
> >   			if (ext->subset_ext_size) {
> >   				for (int j = 0; j < ext->subset_ext_size; j++) {
> > -					if (riscv_isa_extension_check(ext->subset_ext_ids[i]))
> > +					if (riscv_isa_extension_check(ext->subset_ext_ids[j]))
> >   						set_bit(ext->subset_ext_ids[j], isainfo->isa);
> >   				}
> >   			}
> > 
> 
> I think this should go into -fixes, let's check with Palmer if he wants to
> take this patch only or if you should send the patch on its own.

I think splitting out this and patch 1 into a new series targeting fixes
would probably make things clearer?

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