From: Jake Moilanen <moilanen@austin.ibm.com>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org
Subject: [PATCH] CAS DFP support
Date: Wed, 22 Nov 2006 09:20:14 -0600 [thread overview]
Message-ID: <1164208814.1954.372.camel@goblue> (raw)
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>
--- 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 */
next reply other threads:[~2006-11-22 15:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-22 15:20 Jake Moilanen [this message]
2006-11-22 15:25 ` [PATCH] CAS DFP support 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
2006-11-22 21:45 ` Paul Mackerras
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