Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: exec PT_DTRACE
  [SPARC64]: Use shorter list_splice_init() for brevity.
  [SPARC64]: Remove most limitations to kernel image size.

7 files changed, 94 insertions, 166 deletions

diff --git a/arch/sparc64/kernel/ds.c b/arch/sparc64/kernel/ds.c
index bd76482077b..edb74f5a118 100644
--- a/arch/sparc64/kernel/ds.c
+++ b/arch/sparc64/kernel/ds.c
@@ -972,8 +972,7 @@ static void process_ds_work(void)
 	LIST_HEAD(todo);
 
 	spin_lock_irqsave(&ds_lock, flags);
-	list_splice(&ds_work_list, &todo);
-	INIT_LIST_HEAD(&ds_work_list);
+	list_splice_init(&ds_work_list, &todo);
 	spin_unlock_irqrestore(&ds_lock, flags);
 
 	list_for_each_entry_safe(qp, tmp, &todo, list) {
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index 44b105c04dd..34f8ff57c56 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -288,8 +288,12 @@ sun4v_chip_type:
 	/* Leave arg2 as-is, prom_mmu_ihandle_cache */
 	mov	-1, %l3
 	stx	%l3, [%sp + 2047 + 128 + 0x28]	! arg3: mode (-1 default)
-	sethi	%hi(8 * 1024 * 1024), %l3
-	stx	%l3, [%sp + 2047 + 128 + 0x30]	! arg4: size (8MB)
+	/* 4MB align the kernel image size. */
+	set	(_end - KERNBASE), %l3
+	set	((4 * 1024 * 1024) - 1), %l4
+	add	%l3, %l4, %l3
+	andn	%l3, %l4, %l3
+	stx	%l3, [%sp + 2047 + 128 + 0x30]	! arg4: roundup(ksize, 4MB)
 	sethi	%hi(KERNBASE), %l3
 	stx	%l3, [%sp + 2047 + 128 + 0x38]	! arg5: vaddr (KERNBASE)
 	stx	%g0, [%sp + 2047 + 128 + 0x40]	! arg6: empty
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index e116e38b160..acf8c5250aa 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -731,9 +731,6 @@ asmlinkage int sparc_execve(struct pt_regs *regs)
 		current_thread_info()->xfsr[0] = 0;
 		current_thread_info()->fpsaved[0] = 0;
 		regs->tstate &= ~TSTATE_PEF;
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
 	}
 out:
 	return error;
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index cc454731d87..5a1126b363a 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -284,14 +284,17 @@ static void ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg)
 {
 	extern unsigned long sparc64_ttable_tl0;
 	extern unsigned long kern_locked_tte_data;
-	extern int bigkernel;
 	struct hvtramp_descr *hdesc;
 	unsigned long trampoline_ra;
 	struct trap_per_cpu *tb;
 	u64 tte_vaddr, tte_data;
 	unsigned long hv_err;
+	int i;
 
-	hdesc = kzalloc(sizeof(*hdesc), GFP_KERNEL);
+	hdesc = kzalloc(sizeof(*hdesc) +
+			(sizeof(struct hvtramp_mapping) *
+			 num_kernel_image_mappings - 1),
+			GFP_KERNEL);
 	if (!hdesc) {
 		printk(KERN_ERR "ldom_startcpu_cpuid: Cannot allocate "
 		       "hvtramp_descr.\n");
@@ -299,7 +302,7 @@ static void ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg)
 	}
 
 	hdesc->cpu = cpu;
-	hdesc->num_mappings = (bigkernel ? 2 : 1);
+	hdesc->num_mappings = num_kernel_image_mappings;
 
 	tb = &trap_block[cpu];
 	tb->hdesc = hdesc;
@@ -312,13 +315,11 @@ static void ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg)
 	tte_vaddr = (unsigned long) KERNBASE;
 	tte_data = kern_locked_tte_data;
 
-	hdesc->maps[0].vaddr = tte_vaddr;
-	hdesc->maps[0].tte   = tte_data;
-	if (bigkernel) {
+	for (i = 0; i < hdesc->num_mappings; i++) {
+		hdesc->maps[i].vaddr = tte_vaddr;
+		hdesc->maps[i].tte   = tte_data;
 		tte_vaddr += 0x400000;
 		tte_data  += 0x400000;
-		hdesc->maps[1].vaddr = tte_vaddr;
-		hdesc->maps[1].tte   = tte_data;
 	}
 
 	trampoline_ra = kimage_addr_to_ra(hv_cpu_startup);
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index deaba2bd053..2455fa49887 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -678,9 +678,6 @@ asmlinkage long sparc32_execve(struct pt_regs *regs)
 		current_thread_info()->xfsr[0] = 0;
 		current_thread_info()->fpsaved[0] = 0;
 		regs->tstate &= ~TSTATE_PEF;
-		task_lock(current);
-		current->ptrace &= ~PT_DTRACE;
-		task_unlock(current);
 	}
 out:
 	return error;
diff --git a/arch/sparc64/kernel/trampoline.S b/arch/sparc64/kernel/trampoline.S
index 4ae2e525d68..56ff5521134 100644
--- a/arch/sparc64/kernel/trampoline.S
+++ b/arch/sparc64/kernel/trampoline.S
@@ -105,7 +105,7 @@ startup_continue:
 	wr		%g2, 0, %tick_cmpr
 
 	/* Call OBP by hand to lock KERNBASE into i/d tlbs.
-	 * We lock 2 consequetive entries if we are 'bigkernel'.
+	 * We lock 'num_kernel_image_mappings' consequetive entries.
 	 */
 	sethi		%hi(prom_entry_lock), %g2
 1:	ldstub		[%g2 + %lo(prom_entry_lock)], %g1
@@ -119,6 +119,29 @@ startup_continue:
 	add		%l2, -(192 + 128), %sp
 	flushw
 
+	/* Setup the loop variables:
+	 * %l3: VADDR base
+	 * %l4: TTE base
+	 * %l5: Loop iterator, iterates from 0 to 'num_kernel_image_mappings'
+	 * %l6: Number of TTE entries to map
+	 * %l7: Highest TTE entry number, we count down
+	 */
+	sethi		%hi(KERNBASE), %l3
+	sethi		%hi(kern_locked_tte_data), %l4
+	ldx		[%l4 + %lo(kern_locked_tte_data)], %l4
+	clr		%l5
+	sethi		%hi(num_kernel_image_mappings), %l6
+	lduw		[%l6 + %lo(num_kernel_image_mappings)], %l6
+	add		%l6, 1, %l6
+
+	mov		15, %l7
+	BRANCH_IF_ANY_CHEETAH(g1,g5,2f)
+
+	mov		63, %l7
+2:
+
+3:
+	/* Lock into I-MMU */
 	sethi		%hi(call_method), %g2
 	or		%g2, %lo(call_method), %g2
 	stx		%g2, [%sp + 2047 + 128 + 0x00]
@@ -132,63 +155,26 @@ startup_continue:
 	sethi		%hi(prom_mmu_ihandle_cache), %g2
 	lduw		[%g2 + %lo(prom_mmu_ihandle_cache)], %g2
 	stx		%g2, [%sp + 2047 + 128 + 0x20]
-	sethi		%hi(KERNBASE), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x28]
-	sethi		%hi(kern_locked_tte_data), %g2
-	ldx		[%g2 + %lo(kern_locked_tte_data)], %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x30]
-
-	mov		15, %g2
-	BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
 
-	mov		63, %g2
-1:
-	stx		%g2, [%sp + 2047 + 128 + 0x38]
-	sethi		%hi(p1275buf), %g2
-	or		%g2, %lo(p1275buf), %g2
-	ldx		[%g2 + 0x08], %o1
-	call		%o1
-	 add		%sp, (2047 + 128), %o0
+	/* Each TTE maps 4MB, convert index to offset.  */
+	sllx		%l5, 22, %g1
 
-	sethi		%hi(bigkernel), %g2
-	lduw		[%g2 + %lo(bigkernel)], %g2
-	brz,pt		%g2, do_dtlb
-	 nop
+	add		%l3, %g1, %g2
+	stx		%g2, [%sp + 2047 + 128 + 0x28]	! VADDR
+	add		%l4, %g1, %g2
+	stx		%g2, [%sp + 2047 + 128 + 0x30]	! TTE
 
-	sethi		%hi(call_method), %g2
-	or		%g2, %lo(call_method), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x00]
-	mov		5, %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x08]
-	mov		1, %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x10]
-	sethi		%hi(itlb_load), %g2
-	or		%g2, %lo(itlb_load), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x18]
-	sethi		%hi(prom_mmu_ihandle_cache), %g2
-	lduw		[%g2 + %lo(prom_mmu_ihandle_cache)], %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x20]
-	sethi		%hi(KERNBASE + 0x400000), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x28]
-	sethi		%hi(kern_locked_tte_data), %g2
-	ldx		[%g2 + %lo(kern_locked_tte_data)], %g2
-	sethi		%hi(0x400000), %g1
-	add		%g2, %g1, %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x30]
-
-	mov		14, %g2
-	BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
-
-	mov		62, %g2
-1:
+	/* TTE index is highest minus loop index.  */
+	sub		%l7, %l5, %g2
 	stx		%g2, [%sp + 2047 + 128 + 0x38]
+
 	sethi		%hi(p1275buf), %g2
 	or		%g2, %lo(p1275buf), %g2
 	ldx		[%g2 + 0x08], %o1
 	call		%o1
 	 add		%sp, (2047 + 128), %o0
 
-do_dtlb:
+	/* Lock into D-MMU */
 	sethi		%hi(call_method), %g2
 	or		%g2, %lo(call_method), %g2
 	stx		%g2, [%sp + 2047 + 128 + 0x00]
@@ -202,65 +188,30 @@ do_dtlb:
 	sethi		%hi(prom_mmu_ihandle_cache), %g2
 	lduw		[%g2 + %lo(prom_mmu_ihandle_cache)], %g2
 	stx		%g2, [%sp + 2047 + 128 + 0x20]
-	sethi		%hi(KERNBASE), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x28]
-	sethi		%hi(kern_locked_tte_data), %g2
-	ldx		[%g2 + %lo(kern_locked_tte_data)], %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x30]
 
-	mov		15, %g2
-	BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
+	/* Each TTE maps 4MB, convert index to offset.  */
+	sllx		%l5, 22, %g1
 
-	mov		63, %g2
-1:
+	add		%l3, %g1, %g2
+	stx		%g2, [%sp + 2047 + 128 + 0x28]	! VADDR
+	add		%l4, %g1, %g2
+	stx		%g2, [%sp + 2047 + 128 + 0x30]	! TTE
 
+	/* TTE index is highest minus loop index.  */
+	sub		%l7, %l5, %g2
 	stx		%g2, [%sp + 2047 + 128 + 0x38]
+
 	sethi		%hi(p1275buf), %g2
 	or		%g2, %lo(p1275buf), %g2
 	ldx		[%g2 + 0x08], %o1
 	call		%o1
 	 add		%sp, (2047 + 128), %o0
 
-	sethi		%hi(bigkernel), %g2
-	lduw		[%g2 + %lo(bigkernel)], %g2
-	brz,pt		%g2, do_unlock
+	add		%l5, 1, %l5
+	cmp		%l5, %l6
+	bne,pt		%xcc, 3b
 	 nop
 
-	sethi		%hi(call_method), %g2
-	or		%g2, %lo(call_method), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x00]
-	mov		5, %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x08]
-	mov		1, %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x10]
-	sethi		%hi(dtlb_load), %g2
-	or		%g2, %lo(dtlb_load), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x18]
-	sethi		%hi(prom_mmu_ihandle_cache), %g2
-	lduw		[%g2 + %lo(prom_mmu_ihandle_cache)], %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x20]
-	sethi		%hi(KERNBASE + 0x400000), %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x28]
-	sethi		%hi(kern_locked_tte_data), %g2
-	ldx		[%g2 + %lo(kern_locked_tte_data)], %g2
-	sethi		%hi(0x400000), %g1
-	add		%g2, %g1, %g2
-	stx		%g2, [%sp + 2047 + 128 + 0x30]
-
-	mov		14, %g2
-	BRANCH_IF_ANY_CHEETAH(g1,g5,1f)
-
-	mov		62, %g2
-1:
-
-	stx		%g2, [%sp + 2047 + 128 + 0x38]
-	sethi		%hi(p1275buf), %g2
-	or		%g2, %lo(p1275buf), %g2
-	ldx		[%g2 + 0x08], %o1
-	call		%o1
-	 add		%sp, (2047 + 128), %o0
-
-do_unlock:
 	sethi		%hi(prom_entry_lock), %g2
 	stb		%g0, [%g2 + %lo(prom_entry_lock)]
 	membar		#StoreStore | #StoreLoad
@@ -269,47 +220,36 @@ do_unlock:
 	 nop
 
 niagara_lock_tlb:
+	sethi		%hi(KERNBASE), %l3
+	sethi		%hi(kern_locked_tte_data), %l4
+	ldx		[%l4 + %lo(kern_locked_tte_data)], %l4
+	clr		%l5
+	sethi		%hi(num_kernel_image_mappings), %l6
+	lduw		[%l6 + %lo(num_kernel_image_mappings)], %l6
+	add		%l6, 1, %l6
+
+1:
 	mov		HV_FAST_MMU_MAP_PERM_ADDR, %o5
-	sethi		%hi(KERNBASE), %o0
+	sllx		%l5, 22, %g2
+	add		%l3, %g2, %o0
 	clr		%o1
-	sethi		%hi(kern_locked_tte_data), %o2
-	ldx		[%o2 + %lo(kern_locked_tte_data)], %o2
+	add		%l4, %g2, %o2
 	mov		HV_MMU_IMMU, %o3
 	ta		HV_FAST_TRAP
 
 	mov		HV_FAST_MMU_MAP_PERM_ADDR, %o5
-	sethi		%hi(KERNBASE), %o0
+	sllx		%l5, 22, %g2
+	add		%l3, %g2, %o0
 	clr		%o1
-	sethi		%hi(kern_locked_tte_data), %o2
-	ldx		[%o2 + %lo(kern_locked_tte_data)], %o2
+	add		%l4, %g2, %o2
 	mov		HV_MMU_DMMU, %o3
 	ta		HV_FAST_TRAP
 
-	sethi		%hi(bigkernel), %g2
-	lduw		[%g2 + %lo(bigkernel)], %g2
-	brz,pt		%g2, after_lock_tlb
+	add		%l5, 1, %l5
+	cmp		%l5, %l6
+	bne,pt		%xcc, 1b
 	 nop
 
-	mov		HV_FAST_MMU_MAP_PERM_ADDR, %o5
-	sethi		%hi(KERNBASE + 0x400000), %o0
-	clr		%o1
-	sethi		%hi(kern_locked_tte_data), %o2
-	ldx		[%o2 + %lo(kern_locked_tte_data)], %o2
-	sethi		%hi(0x400000), %o3
-	add		%o2, %o3, %o2
-	mov		HV_MMU_IMMU, %o3
-	ta		HV_FAST_TRAP
-
-	mov		HV_FAST_MMU_MAP_PERM_ADDR, %o5
-	sethi		%hi(KERNBASE + 0x400000), %o0
-	clr		%o1
-	sethi		%hi(kern_locked_tte_data), %o2
-	ldx		[%o2 + %lo(kern_locked_tte_data)], %o2
-	sethi		%hi(0x400000), %o3
-	add		%o2, %o3, %o2
-	mov		HV_MMU_DMMU, %o3
-	ta		HV_FAST_TRAP
-
 after_lock_tlb:
 	wrpr		%g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
 	wr		%g0, 0, %fprs
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index b5c30416fda..466fd6cffac 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -166,7 +166,7 @@ unsigned long sparc64_kern_pri_context __read_mostly;
 unsigned long sparc64_kern_pri_nuc_bits __read_mostly;
 unsigned long sparc64_kern_sec_context __read_mostly;
 
-int bigkernel = 0;
+int num_kernel_image_mappings;
 
 #ifdef CONFIG_DEBUG_DCFLUSH
 atomic_t dcpage_flushes = ATOMIC_INIT(0);
@@ -572,7 +572,7 @@ static unsigned long kern_large_tte(unsigned long paddr);
 static void __init remap_kernel(void)
 {
 	unsigned long phys_page, tte_vaddr, tte_data;
-	int tlb_ent = sparc64_highest_locked_tlbent();
+	int i, tlb_ent = sparc64_highest_locked_tlbent();
 
 	tte_vaddr = (unsigned long) KERNBASE;
 	phys_page = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
@@ -582,27 +582,20 @@ static void __init remap_kernel(void)
 
 	/* Now lock us into the TLBs via Hypervisor or OBP. */
 	if (tlb_type == hypervisor) {
-		hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU);
-		hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU);
-		if (bigkernel) {
-			tte_vaddr += 0x400000;
-			tte_data += 0x400000;
+		for (i = 0; i < num_kernel_image_mappings; i++) {
 			hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU);
 			hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU);
+			tte_vaddr += 0x400000;
+			tte_data += 0x400000;
 		}
 	} else {
-		prom_dtlb_load(tlb_ent, tte_data, tte_vaddr);
-		prom_itlb_load(tlb_ent, tte_data, tte_vaddr);
-		if (bigkernel) {
-			tlb_ent -= 1;
-			prom_dtlb_load(tlb_ent,
-				       tte_data + 0x400000, 
-				       tte_vaddr + 0x400000);
-			prom_itlb_load(tlb_ent,
-				       tte_data + 0x400000, 
-				       tte_vaddr + 0x400000);
+		for (i = 0; i < num_kernel_image_mappings; i++) {
+			prom_dtlb_load(tlb_ent - i, tte_data, tte_vaddr);
+			prom_itlb_load(tlb_ent - i, tte_data, tte_vaddr);
+			tte_vaddr += 0x400000;
+			tte_data += 0x400000;
 		}
-		sparc64_highest_unlocked_tlb_ent = tlb_ent - 1;
+		sparc64_highest_unlocked_tlb_ent = tlb_ent - i;
 	}
 	if (tlb_type == cheetah_plus) {
 		sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 |
@@ -1352,12 +1345,9 @@ void __init paging_init(void)
 	shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE);
 
 	real_end = (unsigned long)_end;
-	if ((real_end > ((unsigned long)KERNBASE + 0x400000)))
-		bigkernel = 1;
-	if ((real_end > ((unsigned long)KERNBASE + 0x800000))) {
-		prom_printf("paging_init: Kernel > 8MB, too large.\n");
-		prom_halt();
-	}
+	num_kernel_image_mappings = DIV_ROUND_UP(real_end - KERNBASE, 1 << 22);
+	printk("Kernel: Using %d locked TLB entries for main kernel image.\n",
+	       num_kernel_image_mappings);
 
 	/* Set kernel pgd to upper alias so physical page computations
 	 * work.