powerpc: Free up some CPU feature bits by moving out MMU-related features
Some of the 64bit PPC CPU features are MMU-related, so this patch moves
them to MMU_FTR_ bits. All cpu_has_feature()-style tests are moved to
mmu_has_feature(), and seven feature bits are freed as a result.
Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index 2d71523..3db2476 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -178,23 +178,17 @@
#define LONG_ASM_CONST(x) 0
#endif
-#define CPU_FTR_SLB LONG_ASM_CONST(0x0000000100000000)
-#define CPU_FTR_16M_PAGE LONG_ASM_CONST(0x0000000200000000)
-#define CPU_FTR_TLBIEL LONG_ASM_CONST(0x0000000400000000)
+
#define CPU_FTR_HVMODE_206 LONG_ASM_CONST(0x0000000800000000)
#define CPU_FTR_IABR LONG_ASM_CONST(0x0000002000000000)
#define CPU_FTR_MMCRA LONG_ASM_CONST(0x0000004000000000)
#define CPU_FTR_CTRL LONG_ASM_CONST(0x0000008000000000)
#define CPU_FTR_SMT LONG_ASM_CONST(0x0000010000000000)
-#define CPU_FTR_LOCKLESS_TLBIE LONG_ASM_CONST(0x0000040000000000)
-#define CPU_FTR_CI_LARGE_PAGE LONG_ASM_CONST(0x0000100000000000)
#define CPU_FTR_PAUSE_ZERO LONG_ASM_CONST(0x0000200000000000)
#define CPU_FTR_PURR LONG_ASM_CONST(0x0000400000000000)
#define CPU_FTR_CELL_TB_BUG LONG_ASM_CONST(0x0000800000000000)
#define CPU_FTR_SPURR LONG_ASM_CONST(0x0001000000000000)
#define CPU_FTR_DSCR LONG_ASM_CONST(0x0002000000000000)
-#define CPU_FTR_1T_SEGMENT LONG_ASM_CONST(0x0004000000000000)
-#define CPU_FTR_NO_SLBIE_B LONG_ASM_CONST(0x0008000000000000)
#define CPU_FTR_VSX LONG_ASM_CONST(0x0010000000000000)
#define CPU_FTR_SAO LONG_ASM_CONST(0x0020000000000000)
#define CPU_FTR_CP_USE_DCBTZ LONG_ASM_CONST(0x0040000000000000)
@@ -206,9 +200,10 @@
#ifndef __ASSEMBLY__
-#define CPU_FTR_PPCAS_ARCH_V2 (CPU_FTR_SLB | \
- CPU_FTR_TLBIEL | CPU_FTR_NOEXECUTE | \
- CPU_FTR_NODSISRALIGN | CPU_FTR_16M_PAGE)
+#define CPU_FTR_PPCAS_ARCH_V2 (CPU_FTR_NOEXECUTE | CPU_FTR_NODSISRALIGN)
+
+#define MMU_FTR_PPCAS_ARCH_V2 (MMU_FTR_SLB | MMU_FTR_TLBIEL | \
+ MMU_FTR_16M_PAGE)
/* We only set the altivec features if the kernel was compiled with altivec
* support
@@ -408,38 +403,34 @@
#define CPU_FTRS_POWER5 (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
CPU_FTR_MMCRA | CPU_FTR_SMT | \
- CPU_FTR_COHERENT_ICACHE | CPU_FTR_LOCKLESS_TLBIE | \
- CPU_FTR_PURR | CPU_FTR_STCX_CHECKS_ADDRESS | \
- CPU_FTR_POPCNTB)
+ CPU_FTR_COHERENT_ICACHE | CPU_FTR_PURR | \
+ CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB)
#define CPU_FTRS_POWER6 (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
CPU_FTR_MMCRA | CPU_FTR_SMT | \
- CPU_FTR_COHERENT_ICACHE | CPU_FTR_LOCKLESS_TLBIE | \
+ CPU_FTR_COHERENT_ICACHE | \
CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \
CPU_FTR_DSCR | CPU_FTR_UNALIGNED_LD_STD | \
CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB)
#define CPU_FTRS_POWER7 (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | CPU_FTR_HVMODE_206 |\
CPU_FTR_MMCRA | CPU_FTR_SMT | \
- CPU_FTR_COHERENT_ICACHE | CPU_FTR_LOCKLESS_TLBIE | \
+ CPU_FTR_COHERENT_ICACHE | \
CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \
CPU_FTR_DSCR | CPU_FTR_SAO | CPU_FTR_ASYM_SMT | \
CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD)
#define CPU_FTRS_CELL (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \
- CPU_FTR_PAUSE_ZERO | CPU_FTR_CI_LARGE_PAGE | \
- CPU_FTR_CELL_TB_BUG | CPU_FTR_CP_USE_DCBTZ | \
+ CPU_FTR_PAUSE_ZERO | CPU_FTR_CELL_TB_BUG | CPU_FTR_CP_USE_DCBTZ | \
CPU_FTR_UNALIGNED_LD_STD)
#define CPU_FTRS_PA6T (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
- CPU_FTR_PPCAS_ARCH_V2 | \
- CPU_FTR_ALTIVEC_COMP | CPU_FTR_CI_LARGE_PAGE | \
- CPU_FTR_PURR | CPU_FTR_REAL_LE | CPU_FTR_NO_SLBIE_B)
+ CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_ALTIVEC_COMP | \
+ CPU_FTR_PURR | CPU_FTR_REAL_LE)
#define CPU_FTRS_COMPATIBLE (CPU_FTR_USE_TB | CPU_FTR_PPCAS_ARCH_V2)
#define CPU_FTRS_A2 (CPU_FTR_USE_TB | CPU_FTR_SMT | CPU_FTR_DBELL | \
- CPU_FTR_TLBIEL | CPU_FTR_NOEXECUTE | CPU_FTR_NODSISRALIGN | \
- CPU_FTR_16M_PAGE)
+ CPU_FTR_NOEXECUTE | CPU_FTR_NODSISRALIGN)
#ifdef __powerpc64__
#ifdef CONFIG_PPC_BOOK3E
@@ -449,7 +440,7 @@
(CPU_FTRS_POWER3 | CPU_FTRS_RS64 | CPU_FTRS_POWER4 | \
CPU_FTRS_PPC970 | CPU_FTRS_POWER5 | CPU_FTRS_POWER6 | \
CPU_FTRS_POWER7 | CPU_FTRS_CELL | CPU_FTRS_PA6T | \
- CPU_FTR_1T_SEGMENT | CPU_FTR_VSX)
+ CPU_FTR_VSX)
#endif
#else
enum {
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index bb40a06..a39304b 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -70,6 +70,54 @@
*/
#define MMU_FTR_USE_PAIRED_MAS ASM_CONST(0x01000000)
+/* MMU is SLB-based
+ */
+#define MMU_FTR_SLB ASM_CONST(0x02000000)
+
+/* Support 16M large pages
+ */
+#define MMU_FTR_16M_PAGE ASM_CONST(0x04000000)
+
+/* Supports TLBIEL variant
+ */
+#define MMU_FTR_TLBIEL ASM_CONST(0x08000000)
+
+/* Supports tlbies w/o locking
+ */
+#define MMU_FTR_LOCKLESS_TLBIE ASM_CONST(0x10000000)
+
+/* Large pages can be marked CI
+ */
+#define MMU_FTR_CI_LARGE_PAGE ASM_CONST(0x20000000)
+
+/* 1T segments available
+ */
+#define MMU_FTR_1T_SEGMENT ASM_CONST(0x40000000)
+
+/* Doesn't support the B bit (1T segment) in SLBIE
+ */
+#define MMU_FTR_NO_SLBIE_B ASM_CONST(0x80000000)
+
+/* MMU feature bit sets for various CPUs */
+#define MMU_FTRS_DEFAULT_HPTE_ARCH_V2 \
+ MMU_FTR_HPTE_TABLE | MMU_FTR_PPCAS_ARCH_V2
+#define MMU_FTRS_POWER4 MMU_FTRS_DEFAULT_HPTE_ARCH_V2
+#define MMU_FTRS_PPC970 MMU_FTRS_POWER4
+#define MMU_FTRS_POWER5 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE
+#define MMU_FTRS_POWER6 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE
+#define MMU_FTRS_POWER7 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE | \
+ MMU_FTR_TLBIE_206
+#define MMU_FTRS_CELL MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \
+ MMU_FTR_CI_LARGE_PAGE
+#define MMU_FTRS_PA6T MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \
+ MMU_FTR_CI_LARGE_PAGE | MMU_FTR_NO_SLBIE_B
+#define MMU_FTRS_A2 MMU_FTR_TYPE_3E | MMU_FTR_USE_TLBILX | \
+ MMU_FTR_USE_TLBIVAX_BCAST | \
+ MMU_FTR_LOCK_BCAST_INVAL | \
+ MMU_FTR_USE_TLBRSRV | \
+ MMU_FTR_USE_PAIRED_MAS | \
+ MMU_FTR_TLBIEL | \
+ MMU_FTR_16M_PAGE
#ifndef __ASSEMBLY__
#include <asm/cputable.h>
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h
index 81fb412..8e13f65 100644
--- a/arch/powerpc/include/asm/mmu_context.h
+++ b/arch/powerpc/include/asm/mmu_context.h
@@ -67,7 +67,7 @@
* sub architectures.
*/
#ifdef CONFIG_PPC_STD_MMU_64
- if (cpu_has_feature(CPU_FTR_SLB))
+ if (mmu_has_feature(MMU_FTR_SLB))
switch_slb(tsk, next);
else
switch_stab(tsk, next);