From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: [PATCH] Expose SMT and L1 icache snoop userland features
Date: Wed, 01 Mar 2006 15:07:07 +1100 [thread overview]
Message-ID: <1141186028.4157.33.camel@localhost.localdomain> (raw)
This patch makes userland aware of the icache snoop capability of the
POWER5 (and possibly others in the future) and of SMT capabilities.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Index: linux-work/arch/powerpc/kernel/cputable.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/cputable.c 2006-02-07 13:17:04.000000000 +1100
+++ linux-work/arch/powerpc/kernel/cputable.c 2006-03-01 14:59:20.000000000 +1100
@@ -53,8 +53,10 @@ extern void __setup_cpu_ppc970(unsigned
PPC_FEATURE_HAS_MMU)
#define COMMON_USER_PPC64 (COMMON_USER | PPC_FEATURE_64)
#define COMMON_USER_POWER4 (COMMON_USER_PPC64 | PPC_FEATURE_POWER4)
-#define COMMON_USER_POWER5 (COMMON_USER_PPC64 | PPC_FEATURE_POWER5)
-#define COMMON_USER_POWER5_PLUS (COMMON_USER_PPC64 | PPC_FEATURE_POWER5_PLUS)
+#define COMMON_USER_POWER5 (COMMON_USER_PPC64 | PPC_FEATURE_POWER5 |\
+ PPC_FEATURE_SMT | PPC_FEATURE_ICACHE_SNOOP)
+#define COMMON_USER_POWER5_PLUS (COMMON_USER_PPC64 | PPC_FEATURE_POWER5_PLUS|\
+ PPC_FEATURE_SMT | PPC_FEATURE_ICACHE_SNOOP)
#define COMMON_USER_BOOKE (PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU | \
PPC_FEATURE_BOOKE)
@@ -267,7 +269,8 @@ struct cpu_spec cpu_specs[] = {
.cpu_name = "Cell Broadband Engine",
.cpu_features = CPU_FTRS_CELL,
.cpu_user_features = COMMON_USER_PPC64 |
- PPC_FEATURE_CELL | PPC_FEATURE_HAS_ALTIVEC_COMP,
+ PPC_FEATURE_CELL | PPC_FEATURE_HAS_ALTIVEC_COMP |
+ PPC_FEATURE_SMT,
.icache_bsize = 128,
.dcache_bsize = 128,
.cpu_setup = __setup_cpu_be,
Index: linux-work/include/asm-powerpc/cputable.h
===================================================================
--- linux-work.orig/include/asm-powerpc/cputable.h 2006-02-28 16:52:18.000000000 +1100
+++ linux-work/include/asm-powerpc/cputable.h 2006-03-01 14:27:51.000000000 +1100
@@ -20,6 +20,8 @@
#define PPC_FEATURE_POWER5_PLUS 0x00020000
#define PPC_FEATURE_CELL 0x00010000
#define PPC_FEATURE_BOOKE 0x00008000
+#define PPC_FEATURE_SMT 0x00004000
+#define PPC_FEATURE_ICACHE_SNOOP 0x00002000
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
reply other threads:[~2006-03-01 4:07 UTC|newest]
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