8 files changed, 62 insertions, 34 deletions

diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 5af4e9b2dbe2..73cb6a3229ae 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -367,27 +367,24 @@ static int emulate_multiple(struct pt_regs *regs, unsigned char __user *addr,
 static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
                            unsigned int flags)
 {
-        char *ptr = (char *) &current->thread.TS_FPR(reg);
-        int i, ret;
+        char *ptr0 = (char *) &current->thread.TS_FPR(reg);
+        char *ptr1 = (char *) &current->thread.TS_FPR(reg+1);
+        int i, ret, sw = 0;
 
         if (!(flags & F))
                 return 0;
         if (reg & 1)
                 return 0;       /* invalid form: FRS/FRT must be even */
-        if (!(flags & SW)) {
-                /* not byte-swapped - easy */
-                if (!(flags & ST))
-                        ret = __copy_from_user(ptr, addr, 16);
-                else
-                        ret = __copy_to_user(addr, ptr, 16);
-        } else {
-                /* each FPR value is byte-swapped separately */
-                ret = 0;
-                for (i = 0; i < 16; ++i) {
-                        if (!(flags & ST))
-                                ret |= __get_user(ptr[i^7], addr + i);
-                        else
-                                ret |= __put_user(ptr[i^7], addr + i);
+        if (flags & SW)
+                sw = 7;
+        ret = 0;
+        for (i = 0; i < 8; ++i) {
+                if (!(flags & ST)) {
+                        ret |= __get_user(ptr0[i^sw], addr + i);
+                        ret |= __get_user(ptr1[i^sw], addr + i + 8);
+                } else {
+                        ret |= __put_user(ptr0[i^sw], addr + i);
+                        ret |= __put_user(ptr1[i^sw], addr + i + 8);
                 }
         }
         if (ret)
@@ -646,11 +643,16 @@ static int emulate_vsx(unsigned char __user *addr, unsigned int reg,
                        unsigned int areg, struct pt_regs *regs,
                        unsigned int flags, unsigned int length)
 {
-        char *ptr = (char *) &current->thread.TS_FPR(reg);
+        char *ptr;
         int ret = 0;
 
         flush_vsx_to_thread(current);
 
+        if (reg < 32)
+                ptr = (char *) &current->thread.TS_FPR(reg);
+        else
+                ptr = (char *) &current->thread.vr[reg - 32];
+
         if (flags & ST)
                 ret = __copy_to_user(addr, ptr, length);
         else {
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 19ee491e9e23..42fe4da4e8ae 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -49,7 +49,7 @@
 #include <asm/iseries/alpaca.h>
 #endif
 #ifdef CONFIG_KVM
-#include <asm/kvm_44x.h>
+#include <linux/kvm_host.h>
 #endif
 
 #if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
@@ -361,8 +361,6 @@ int main(void)
         DEFINE(PTE_SIZE, sizeof(pte_t));
 
 #ifdef CONFIG_KVM
-        DEFINE(TLBE_BYTES, sizeof(struct kvmppc_44x_tlbe));
-
         DEFINE(VCPU_HOST_STACK, offsetof(struct kvm_vcpu, arch.host_stack));
         DEFINE(VCPU_HOST_PID, offsetof(struct kvm_vcpu, arch.host_pid));
         DEFINE(VCPU_GPRS, offsetof(struct kvm_vcpu, arch.gpr));
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 5355244c99ff..60c60ccf5e3c 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -195,8 +195,9 @@ __ftrace_make_nop(struct module *mod,
                 return -EINVAL;
         }
 
-        offset = (unsigned)((unsigned short)jmp[0]) << 16 |
-                (unsigned)((unsigned short)jmp[1]);
+        /* The bottom half is signed extended */
+        offset = ((unsigned)((unsigned short)jmp[0]) << 16) +
+                (int)((short)jmp[1]);
 
         DEBUGP(" %x ", offset);
 
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index a1c4cfd25ded..d794a637e421 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -511,8 +511,11 @@ InstructionTLBMiss:
         and     r1,r1,r2                /* writable if _RW and _DIRTY */
         rlwimi  r3,r3,32-1,30,30        /* _PAGE_USER -> PP msb */
         rlwimi  r3,r3,32-1,31,31        /* _PAGE_USER -> PP lsb */
-        ori     r1,r1,0xe14             /* clear out reserved bits and M */
+        ori     r1,r1,0xe04             /* clear out reserved bits */
         andc    r1,r3,r1                /* PP = user? (rw&dirty? 2: 3): 0 */
+BEGIN_FTR_SECTION
+        rlwinm  r1,r1,0,~_PAGE_COHERENT /* clear M (coherence not required) */
+END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
         mtspr   SPRN_RPA,r1
         mfspr   r3,SPRN_IMISS
         tlbli   r3
@@ -585,8 +588,11 @@ DataLoadTLBMiss:
         and     r1,r1,r2                /* writable if _RW and _DIRTY */
         rlwimi  r3,r3,32-1,30,30        /* _PAGE_USER -> PP msb */
         rlwimi  r3,r3,32-1,31,31        /* _PAGE_USER -> PP lsb */
-        ori     r1,r1,0xe14             /* clear out reserved bits and M */
+        ori     r1,r1,0xe04             /* clear out reserved bits */
         andc    r1,r3,r1                /* PP = user? (rw&dirty? 2: 3): 0 */
+BEGIN_FTR_SECTION
+        rlwinm  r1,r1,0,~_PAGE_COHERENT /* clear M (coherence not required) */
+END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
         mtspr   SPRN_RPA,r1
         mfspr   r3,SPRN_DMISS
         tlbld   r3
@@ -653,8 +659,11 @@ DataStoreTLBMiss:
         stw     r3,0(r2)                /* update PTE (accessed/dirty bits) */
         /* Convert linux-style PTE to low word of PPC-style PTE */
         rlwimi  r3,r3,32-1,30,30        /* _PAGE_USER -> PP msb */
-        li      r1,0xe15                /* clear out reserved bits and M */
+        li      r1,0xe05                /* clear out reserved bits & PP lsb */
         andc    r1,r3,r1                /* PP = user? 2: 0 */
+BEGIN_FTR_SECTION
+        rlwinm  r1,r1,0,~_PAGE_COHERENT /* clear M (coherence not required) */
+END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
         mtspr   SPRN_RPA,r1
         mfspr   r3,SPRN_DMISS
         tlbld   r3
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 23b8b5e36f98..17efb7118db1 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -190,7 +190,7 @@ int show_interrupts(struct seq_file *p, void *v)
                 seq_printf(p, "%3d: ", i);
 #ifdef CONFIG_SMP
                 for_each_online_cpu(j)
-                        seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+                        seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
 #else
                 seq_printf(p, "%10u ", kstat_irqs(i));
 #endif /* CONFIG_SMP */
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index da5a3855a0c4..0f4181272311 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -16,8 +16,6 @@
  * 2 of the License, or (at your option) any later version.
  */
 
-#define DEBUG
-
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/string.h>
@@ -258,7 +256,8 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
         } else {
                 pr_debug(" Got one, spec %d cells (0x%08x 0x%08x...) on %s\n",
                          oirq.size, oirq.specifier[0], oirq.specifier[1],
-                    oirq.controller->full_name);
+                         oirq.controller ? oirq.controller->full_name :
+                         "<default>");
 
                 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
                                              oirq.size);
@@ -562,8 +561,21 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus,
                  (unsigned long long)(offset + size - 1));
 
         if (mmap_state == pci_mmap_mem) {
-                if ((offset + size) > hose->isa_mem_size)
-                        return -ENXIO;
+                /* Hack alert !
+                 *
+                 * Because X is lame and can fail starting if it gets an error trying
+                 * to mmap legacy_mem (instead of just moving on without legacy memory
+                 * access) we fake it here by giving it anonymous memory, effectively
+                 * behaving just like /dev/zero
+                 */
+                if ((offset + size) > hose->isa_mem_size) {
+                        printk(KERN_DEBUG
+                               "Process %s (pid:%d) mapped non-existing PCI legacy memory for 0%04x:%02x\n",
+                               current->comm, current->pid, pci_domain_nr(bus), bus->number);
+                        if (vma->vm_flags & VM_SHARED)
+                                return shmem_zero_setup(vma);
+                        return 0;
+                }
                 offset += hose->isa_mem_phys;
         } else {
                 unsigned long io_offset = (unsigned long)hose->io_base_virt - _IO_BASE;
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index c09cffafb6ee..f00f83109ab3 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -590,6 +590,11 @@ static void __init check_cpu_slb_size(unsigned long node)
 {
         u32 *slb_size_ptr;
 
+        slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL);
+        if (slb_size_ptr != NULL) {
+                mmu_slb_size = *slb_size_ptr;
+                return;
+        }
         slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL);
         if (slb_size_ptr != NULL) {
                 mmu_slb_size = *slb_size_ptr;
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 94aa7b011b27..d3694498f3af 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -492,14 +492,14 @@ static void *vio_dma_iommu_alloc_coherent(struct device *dev, size_t size,
         struct vio_dev *viodev = to_vio_dev(dev);
         void *ret;
 
-        if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE))) {
+        if (vio_cmo_alloc(viodev, roundup(size, PAGE_SIZE))) {
                 atomic_inc(&viodev->cmo.allocs_failed);
                 return NULL;
         }
 
         ret = dma_iommu_ops.alloc_coherent(dev, size, dma_handle, flag);
         if (unlikely(ret == NULL)) {
-                vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
+                vio_cmo_dealloc(viodev, roundup(size, PAGE_SIZE));
                 atomic_inc(&viodev->cmo.allocs_failed);
         }
 
@@ -513,7 +513,7 @@ static void vio_dma_iommu_free_coherent(struct device *dev, size_t size,
 
         dma_iommu_ops.free_coherent(dev, size, vaddr, dma_handle);
 
-        vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
+        vio_cmo_dealloc(viodev, roundup(size, PAGE_SIZE));
 }
 
 static dma_addr_t vio_dma_iommu_map_page(struct device *dev, struct page *page,
@@ -572,6 +572,7 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
         if (unlikely(!ret)) {
                 vio_cmo_dealloc(viodev, alloc_size);
                 atomic_inc(&viodev->cmo.allocs_failed);
+                return ret;
         }
 
         for (sgl = sglist, count = 0; count < ret; count++, sgl++)