linux-kernel - Re: [patch 1/6] ps3: Preallocate bootmem memory for the PS3 FLASH ROM storage driver

Open Source and information security mailing list archives

Message-Id: <1181914039.26853.80.camel@localhost.localdomain>
Date:	Fri, 15 Jun 2007 23:27:19 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
Cc:	Paul Mackerras <paulus@...ba.org>, linuxppc-dev@...abs.org,
	Jens Axboe <axboe@...nel.dk>,
	"James E.J. Bottomley" <James.Bottomley@...elEye.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 1/6] ps3: Preallocate bootmem memory for the PS3 FLASH
	ROM storage driver

On Fri, 2007-06-15 at 13:39 +0200, Geert Uytterhoeven wrote:
> plain text document attachment (ps3-stable)
> Preallocate 256 KiB of bootmem memory for the PS3 FLASH ROM storage driver.

I still very much dislike the #ifdef xxx_MODULE in main kernel code.

At the end of the day, is it realistic to ever use a PS3 without the
storage driver ? I would suggest just allocating those unconditionally.

Ben.

> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
> Signed-off-by: Geoff Levand <geoffrey.levand@...sony.com>
> ---
>  arch/powerpc/platforms/ps3/setup.c |   19 ++++++++++++++++++-
>  include/asm-powerpc/ps3.h          |    1 +
>  2 files changed, 19 insertions(+), 1 deletion(-)
> 
> --- a/arch/powerpc/platforms/ps3/setup.c
> +++ b/arch/powerpc/platforms/ps3/setup.c
> @@ -107,7 +107,8 @@ static void ps3_panic(char *str)
>  	while(1);
>  }
>  
> -#if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE)
> +#if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE) || \
> +    defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
>  static void prealloc(struct ps3_prealloc *p)
>  {
>  	if (!p->size)
> @@ -123,7 +124,9 @@ static void prealloc(struct ps3_prealloc
>  	printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
>  	       p->address);
>  }
> +#endif
>  
> +#if defined(CONFIG_FB_PS3) || defined(CONFIG_FB_PS3_MODULE)
>  struct ps3_prealloc ps3fb_videomemory = {
>  	.name = "ps3fb videomemory",
>  	.size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
> @@ -146,6 +149,18 @@ early_param("ps3fb", early_parse_ps3fb);
>  #define prealloc_ps3fb_videomemory()	do { } while (0)
>  #endif
>  
> +#if defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE)
> +struct ps3_prealloc ps3flash_bounce_buffer = {
> +	.name = "ps3flash bounce buffer",
> +	.size = 256*1024,
> +	.align = 256*1024
> +};
> +EXPORT_SYMBOL_GPL(ps3flash_bounce_buffer);
> +#define prealloc_ps3flash_bounce_buffer()	prealloc(&ps3flash_bounce_buffer)
> +#else
> +#define prealloc_ps3flash_bounce_buffer()	do { } while (0)
> +#endif
> +
>  static int ps3_set_dabr(u64 dabr)
>  {
>  	enum {DABR_USER = 1, DABR_KERNEL = 2,};
> @@ -175,6 +190,8 @@ static void __init ps3_setup_arch(void)
>  #endif
>  
>  	prealloc_ps3fb_videomemory();
> +	prealloc_ps3flash_bounce_buffer();
> +
>  	ppc_md.power_save = ps3_power_save;
>  
>  	DBG(" <- %s:%d\n", __func__, __LINE__);
> --- a/include/asm-powerpc/ps3.h
> +++ b/include/asm-powerpc/ps3.h
> @@ -427,6 +427,7 @@ struct ps3_prealloc {
>  };
>  
>  extern struct ps3_prealloc ps3fb_videomemory;
> +extern struct ps3_prealloc ps3flash_bounce_buffer;
>  
> 
>  #endif
> 
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@...abs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

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