powerpc/fsl-booke: Add support for tlbilx instructions

The e500mc core supports the new tlbilx instructions that do core
local invalidates and also provide us the ability to take down
all TLB entries matching a given PID.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 5c78079..dc82dcd 100644 (file)
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -36,9 +36,9 @@
  */
 #define MMU_FTR_USE_TLBIVAX_BCAST      ASM_CONST(0x00040000)
 
-/* Enable use of tlbilx invalidate-by-PID variant.
+/* Enable use of tlbilx invalidate instructions.
  */
-#define MMU_FTR_USE_TLBILX_PID         ASM_CONST(0x00080000)
+#define MMU_FTR_USE_TLBILX             ASM_CONST(0x00080000)
 
 /* This indicates that the processor cannot handle multiple outstanding
  * broadcast tlbivax or tlbsync. This makes the code use a spinlock

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index f59ca71..b2938e0 100644 (file)
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1754,7 +1754,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
                .cpu_name               = "e500mc",
                .cpu_features           = CPU_FTRS_E500MC,
                .cpu_user_features      = COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
-               .mmu_features           = MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS,
+               .mmu_features           = MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS |
+                       MMU_FTR_USE_TLBILX,
                .icache_bsize           = 64,
                .dcache_bsize           = 64,
                .num_pmcs               = 4,

diff --git a/arch/powerpc/mm/tlb_nohash_low.S b/arch/powerpc/mm/tlb_nohash_low.S
index f900a39..788b87c 100644 (file)
--- a/arch/powerpc/mm/tlb_nohash_low.S
+++ b/arch/powerpc/mm/tlb_nohash_low.S
@@ -118,25 +118,50 @@ _GLOBAL(_tlbil_pid)
 
 #elif defined(CONFIG_FSL_BOOKE)
 /*
- * FSL BookE implementations. Currently _pid and _all are the
- * same. This will change when tlbilx is actually supported and
- * performs invalidate-by-PID. This change will be driven by
- * mmu_features conditional
+ * FSL BookE implementations.
+ *
+ * Since feature sections are using _SECTION_ELSE we need
+ * to have the larger code path before the _SECTION_ELSE
  */
 
+#define MMUCSR0_TLBFI  (MMUCSR0_TLB0FI | MMUCSR0_TLB1FI | \
+                        MMUCSR0_TLB2FI | MMUCSR0_TLB3FI)
 /*
  * Flush MMU TLB on the local processor
  */
-_GLOBAL(_tlbil_pid)
 _GLOBAL(_tlbil_all)
-#define MMUCSR0_TLBFI  (MMUCSR0_TLB0FI | MMUCSR0_TLB1FI | \
-                        MMUCSR0_TLB2FI | MMUCSR0_TLB3FI)
+BEGIN_MMU_FTR_SECTION
+       li      r3,(MMUCSR0_TLBFI)@l
+       mtspr   SPRN_MMUCSR0, r3
+1:
+       mfspr   r3,SPRN_MMUCSR0
+       andi.   r3,r3,MMUCSR0_TLBFI@l
+       bne     1b
+MMU_FTR_SECTION_ELSE
+       PPC_TLBILX_ALL(0,0)
+ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
+       msync
+       isync
+       blr
+
+_GLOBAL(_tlbil_pid)
+BEGIN_MMU_FTR_SECTION
+       slwi    r3,r3,16
+       mfmsr   r10
+       wrteei  0
+       mfspr   r4,SPRN_MAS6    /* save MAS6 */
+       mtspr   SPRN_MAS6,r3
+       PPC_TLBILX_PID(0,0)
+       mtspr   SPRN_MAS6,r4    /* restore MAS6 */
+       wrtee   r10
+MMU_FTR_SECTION_ELSE
        li      r3,(MMUCSR0_TLBFI)@l
        mtspr   SPRN_MMUCSR0, r3
 1:
        mfspr   r3,SPRN_MMUCSR0
        andi.   r3,r3,MMUCSR0_TLBFI@l
        bne     1b
+ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBILX)
        msync
        isync
        blr
@@ -149,7 +174,9 @@ _GLOBAL(_tlbil_va)
        mfmsr   r10
        wrteei  0
        slwi    r4,r4,16
+       ori     r4,r4,(MAS6_ISIZE(BOOK3E_PAGESZ_4K))@l
        mtspr   SPRN_MAS6,r4            /* assume AS=0 for now */
+BEGIN_MMU_FTR_SECTION
        tlbsx   0,r3
        mfspr   r4,SPRN_MAS1            /* check valid */
        andis.  r3,r4,MAS1_VALID@h
@@ -157,6 +184,9 @@ _GLOBAL(_tlbil_va)
        rlwinm  r4,r4,0,1,31
        mtspr   SPRN_MAS1,r4
        tlbwe
+MMU_FTR_SECTION_ELSE
+       PPC_TLBILX_VA(0,r3)
+ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_USE_TLBILX)
        msync
        isync
 1:     wrtee   r10