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.

9 files changed, 97 insertions, 167 deletions

diff --git a/arch/sparc64/kernel/ds.c b/arch/sparc64/kernel/ds.c
index bd76482077be..edb74f5a1186 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 44b105c04dd3..34f8ff57c56b 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 e116e38b160e..acf8c5250aa9 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 cc454731d879..5a1126b363a4 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 deaba2bd0535..2455fa498876 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 4ae2e525d68b..56ff55211341 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 b5c30416fdac..466fd6cffac9 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.
diff --git a/include/asm-sparc64/hvtramp.h b/include/asm-sparc64/hvtramp.h
index c7dd6ad056df..b2b9b947b3a4 100644
--- a/include/asm-sparc64/hvtramp.h
+++ b/include/asm-sparc64/hvtramp.h
@@ -16,7 +16,7 @@ struct hvtramp_descr {
         __u64                   fault_info_va;
         __u64                   fault_info_pa;
         __u64                   thread_reg;
-        struct hvtramp_mapping  maps[2];
+        struct hvtramp_mapping  maps[1];
 };
 
 extern void hv_cpu_startup(unsigned long hvdescr_pa);
diff --git a/include/asm-sparc64/spitfire.h b/include/asm-sparc64/spitfire.h
index 63b7040e8134..985ea7e31992 100644
--- a/include/asm-sparc64/spitfire.h
+++ b/include/asm-sparc64/spitfire.h
@@ -63,6 +63,8 @@ extern void cheetah_enable_pcache(void);
          SPITFIRE_HIGHEST_LOCKED_TLBENT : \
          CHEETAH_HIGHEST_LOCKED_TLBENT)
 
+extern int num_kernel_image_mappings;
+
 /* The data cache is write through, so this just invalidates the
  * specified line.
  */