[PATCH] powerpc: Expose SMT and L1 icache snoop userland features
Benjamin Herrenschmidt [Wed, 1 Mar 2006 04:07:07 +0000 (15:07 +1100)]
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>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/cputable.c
include/asm-powerpc/cputable.h

index 1069645..e4e8137 100644 (file)
@@ -53,8 +53,10 @@ extern void __setup_cpu_ppc970(unsigned long offset, struct cpu_spec* spec);
                                 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 90d005b..5638518 100644 (file)
@@ -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__