linux-kernel - Re: [PATCH] cache: StarFive: Require a 64-bit system

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20240722-audible-stopwatch-d3f45920991c@spud>
Date: Mon, 22 Jul 2024 16:36:28 +0100
From: Conor Dooley <conor@...nel.org>
To: Palmer Dabbelt <palmer@...osinc.com>
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cache: StarFive: Require a 64-bit system

On Mon, Jul 22, 2024 at 04:33:27PM +0100, Conor Dooley wrote:
> On Fri, Jul 19, 2024 at 09:38:41AM -0700, Palmer Dabbelt wrote:
> > From: Palmer Dabbelt <palmer@...osinc.com>
> > 
> > This has a bunch of {read,write}q() calls, so it won't work on 32-bit
> > systems.  I don't think there's any 32-bit StarFive systems, so for now
> > just require 64-bit.
> > 
> > Fixes: cabff60ca77d ("cache: Add StarFive StarLink cache management")
> > Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
> 
> Acked-by: Conor Dooley <conor.dooley@...rochip.com>
> if you wanna take it - might be worth being explicit about it causing
> build issues for rv32 though.
> 
> > ---
> >  drivers/cache/Kconfig                   | 1 +
> >  drivers/cache/starfive_starlink_cache.c | 2 +-
> >  2 files changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/cache/Kconfig b/drivers/cache/Kconfig
> > index 94abd8f632a7..db51386c663a 100644
> > --- a/drivers/cache/Kconfig
> > +++ b/drivers/cache/Kconfig
> > @@ -18,6 +18,7 @@ config STARFIVE_STARLINK_CACHE
> >  	bool "StarFive StarLink Cache controller"
> >  	depends on RISCV
> >  	depends on ARCH_STARFIVE
> > +	depends on 64BIT
> >  	select RISCV_DMA_NONCOHERENT
> >  	select RISCV_NONSTANDARD_CACHE_OPS
> >  	help
> > diff --git a/drivers/cache/starfive_starlink_cache.c b/drivers/cache/starfive_starlink_cache.c
> > index 24c7d078ca22..8ee9569771f8 100644
> > --- a/drivers/cache/starfive_starlink_cache.c
> > +++ b/drivers/cache/starfive_starlink_cache.c
> > @@ -19,7 +19,7 @@
> >  #define STARLINK_CACHE_FLUSH_CTL			0x10
> >  #define STARLINK_CACHE_ALIGN				0x40
> >  
> > -#define STARLINK_CACHE_ADDRESS_RANGE_MASK		GENMASK(39, 0)
> > +#define STARLINK_CACHE_ADDRESS_RANGE_MASK		GENMASK(39ULL, 0)

Actually, Emil pointed out on IRC that this looks wrong. Should probably
be GENMASK_ULL(39, 0), not GENMASK(39ULL, 0)



Download attachment "signature.asc" of type "application/pgp-signature" (229 bytes)