Merge remote-tracking branch 'scott/next' into next

Freescale updates from Scott. Mostly support for critical
and machine check exceptions on 64-bit BookE, some new
PCI suspend/resume work and misc bits.

arch/powerpc/mm/tlb_low_64e.S

@@ -39,37 +39,49 @@
  *                                                                    *
  **********************************************************************/
 
+/*
+ * Note that, unlike non-bolted handlers, TLB_EXFRAME is not
+ * modified by the TLB miss handlers themselves, since the TLB miss
+ * handler code will not itself cause a recursive TLB miss.
+ *
+ * TLB_EXFRAME will be modified when crit/mc/debug exceptions are
+ * entered/exited.
+ */
 .macro tlb_prolog_bolted intnum addr
-	mtspr	SPRN_SPRG_GEN_SCRATCH,r13
+	mtspr	SPRN_SPRG_GEN_SCRATCH,r12
+	mfspr	r12,SPRN_SPRG_TLB_EXFRAME
+	std	r13,EX_TLB_R13(r12)
+	std	r10,EX_TLB_R10(r12)
 	mfspr	r13,SPRN_SPRG_PACA
-	std	r10,PACA_EXTLB+EX_TLB_R10(r13)
+
 	mfcr	r10
-	std	r11,PACA_EXTLB+EX_TLB_R11(r13)
+	std	r11,EX_TLB_R11(r12)
 #ifdef CONFIG_KVM_BOOKE_HV
 BEGIN_FTR_SECTION
 	mfspr	r11, SPRN_SRR1
 END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
 #endif
 	DO_KVM	\intnum, SPRN_SRR1
-	std	r16,PACA_EXTLB+EX_TLB_R16(r13)
+	std	r16,EX_TLB_R16(r12)
 	mfspr	r16,\addr		/* get faulting address */
-	std	r14,PACA_EXTLB+EX_TLB_R14(r13)
+	std	r14,EX_TLB_R14(r12)
 	ld	r14,PACAPGD(r13)
-	std	r15,PACA_EXTLB+EX_TLB_R15(r13)
-	std	r10,PACA_EXTLB+EX_TLB_CR(r13)
-	TLB_MISS_PROLOG_STATS_BOLTED
+	std	r15,EX_TLB_R15(r12)
+	std	r10,EX_TLB_CR(r12)
+	TLB_MISS_PROLOG_STATS
 .endm
 
 .macro tlb_epilog_bolted
-	ld	r14,PACA_EXTLB+EX_TLB_CR(r13)
-	ld	r10,PACA_EXTLB+EX_TLB_R10(r13)
-	ld	r11,PACA_EXTLB+EX_TLB_R11(r13)
+	ld	r14,EX_TLB_CR(r12)
+	ld	r10,EX_TLB_R10(r12)
+	ld	r11,EX_TLB_R11(r12)
+	ld	r13,EX_TLB_R13(r12)
 	mtcr	r14
-	ld	r14,PACA_EXTLB+EX_TLB_R14(r13)
-	ld	r15,PACA_EXTLB+EX_TLB_R15(r13)
-	TLB_MISS_RESTORE_STATS_BOLTED
-	ld	r16,PACA_EXTLB+EX_TLB_R16(r13)
-	mfspr	r13,SPRN_SPRG_GEN_SCRATCH
+	ld	r14,EX_TLB_R14(r12)
+	ld	r15,EX_TLB_R15(r12)
+	TLB_MISS_RESTORE_STATS
+	ld	r16,EX_TLB_R16(r12)
+	mfspr	r12,SPRN_SPRG_GEN_SCRATCH
 .endm
 
 /* Data TLB miss */
@@ -284,7 +296,7 @@ itlb_miss_fault_bolted:
  * r14 = page table base
  * r13 = PACA
  * r11 = tlb_per_core ptr
- * r10 = crap (free to use)
+ * r10 = cpu number
  */
 tlb_miss_common_e6500:
 	/*
@@ -293,15 +305,18 @@ tlb_miss_common_e6500:
 	 *
 	 * MAS6:IND should be already set based on MAS4
 	 */
-	addi	r10,r11,TCD_LOCK
-1:	lbarx	r15,0,r10
+1:	lbarx	r15,0,r11
+	lhz	r10,PACAPACAINDEX(r13)
 	cmpdi	r15,0
+	cmpdi	cr1,r15,1	/* set cr1.eq = 0 for non-recursive */
 	bne	2f
-	li	r15,1
-	stbcx.	r15,0,r10
+	stbcx.	r10,0,r11
 	bne	1b
+3:
 	.subsection 1
-2:	lbz	r15,0(r10)
+2:	cmpd	cr1,r15,r10	/* recursive lock due to mcheck/crit/etc? */
+	beq	cr1,3b		/* unlock will happen if cr1.eq = 0 */
+	lbz	r15,0(r11)
 	cmpdi	r15,0
 	bne	2b
 	b	1b
@@ -379,9 +394,11 @@ tlb_miss_common_e6500:
 
 tlb_miss_done_e6500:
 	.macro	tlb_unlock_e6500
+	beq	cr1,1f		/* no unlock if lock was recursively grabbed */
 	li	r15,0
 	isync
-	stb	r15,TCD_LOCK(r11)
+	stb	r15,0(r11)
+1:
 	.endm
 
 	tlb_unlock_e6500

arch/powerpc/mm/tlb_nohash.c

@@ -144,6 +144,15 @@ int mmu_vmemmap_psize;		/* Page size used for the virtual mem map */
 int book3e_htw_mode;		/* HW tablewalk?  Value is PPC_HTW_* */
 unsigned long linear_map_top;	/* Top of linear mapping */
 
+
+/*
+ * Number of bytes to add to SPRN_SPRG_TLB_EXFRAME on crit/mcheck/debug
+ * exceptions.  This is used for bolted and e6500 TLB miss handlers which
+ * do not modify this SPRG in the TLB miss code; for other TLB miss handlers,
+ * this is set to zero.
+ */
+int extlb_level_exc;
+
 #endif /* CONFIG_PPC64 */
 
 #ifdef CONFIG_PPC_FSL_BOOK3E
@@ -559,6 +568,7 @@ static void setup_mmu_htw(void)
 		break;
 #ifdef CONFIG_PPC_FSL_BOOK3E
 	case PPC_HTW_E6500:
+		extlb_level_exc = EX_TLB_SIZE;
 		patch_exception(0x1c0, exc_data_tlb_miss_e6500_book3e);
 		patch_exception(0x1e0, exc_instruction_tlb_miss_e6500_book3e);
 		break;
@@ -652,6 +662,7 @@ static void __early_init_mmu(int boot_cpu)
 		memblock_enforce_memory_limit(linear_map_top);
 
 		if (book3e_htw_mode == PPC_HTW_NONE) {
+			extlb_level_exc = EX_TLB_SIZE;
 			patch_exception(0x1c0, exc_data_tlb_miss_bolted_book3e);
 			patch_exception(0x1e0,
 				exc_instruction_tlb_miss_bolted_book3e);