From: Will Schmidt <will_schmidt@vnet.ibm.com>
To: Jake Moilanen <moilanen@austin.ibm.com>
Cc: linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH] CAS DFP support
Date: Wed, 22 Nov 2006 12:36:59 -0600 [thread overview]
Message-ID: <1164220619.8536.9.camel@localhost> (raw)
In-Reply-To: <1164208814.1954.372.camel@goblue>
On Wed, 2006-22-11 at 09:20 -0600, Jake Moilanen wrote:
> When booting a Power6 in compat mode, the DFP bit must be set in the
> client architecture call, or else firmware will downgrade the compliance
> to P5 compat mode, thus removing VMX and DFP instructions.
>
> Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com>
Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com>
>
> --- 2.6/arch/powerpc/kernel/prom_init.c~ 2006-11-13 15:01:13.000000000
> -0600
> +++ 2.6/arch/powerpc/kernel/prom_init.c 2006-11-21 18:38:27.000000000
> -0600
> @@ -627,6 +627,7 @@ static void __init early_cmdline_parse(v
> /* Option vector 3: processor options supported */
> #define OV3_FP 0x80 /* floating point */
> #define OV3_VMX 0x40 /* VMX/Altivec */
> +#define OV3_DFP 0x20 /* decimal floating point */
>
> /* Option vector 5: PAPR/OF options supported */
> #define OV5_LPAR 0x80 /* logical partitioning supported */
> @@ -674,7 +675,7 @@ static unsigned char ibm_architecture_ve
> /* option vector 3: processor options supported */
> 3 - 2, /* length */
> 0, /* don't ignore, don't halt */
> - OV3_FP | OV3_VMX,
> + OV3_FP | OV3_VMX | OV3_DFP,
>
> /* option vector 4: IBM PAPR implementation */
> 2 - 2, /* length */
>
>
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
next prev parent reply other threads:[~2006-11-22 18:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-22 15:20 [PATCH] CAS DFP support Jake Moilanen
2006-11-22 15:25 ` Kumar Gala
2006-11-22 15:46 ` Kumar Gala
2006-11-22 15:58 ` Jake Moilanen
2006-11-22 16:06 ` Peter Bergner
2006-11-22 16:41 ` Kumar Gala
2006-11-22 18:36 ` Will Schmidt
2006-11-22 18:51 ` Kumar Gala
2006-11-23 14:39 ` Segher Boessenkool
2006-11-22 21:48 ` Paul Mackerras
2006-11-22 18:36 ` Will Schmidt [this message]
2006-11-22 21:45 ` Paul Mackerras
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