Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Fix boot failure on POWER6
  [POWERPC] Workaround for iommu page alignment

diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 2d0c9ef..79a85d6 100644 (file)
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -278,6 +278,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
        unsigned long flags;
        struct scatterlist *s, *outs, *segstart;
        int outcount, incount, i;
+       unsigned int align;
        unsigned long handle;
 
        BUG_ON(direction == DMA_NONE);
@@ -309,7 +310,12 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
                /* Allocate iommu entries for that segment */
                vaddr = (unsigned long) sg_virt(s);
                npages = iommu_num_pages(vaddr, slen);
-               entry = iommu_range_alloc(tbl, npages, &handle, mask >> IOMMU_PAGE_SHIFT, 0);
+               align = 0;
+               if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && slen >= PAGE_SIZE &&
+                   (vaddr & ~PAGE_MASK) == 0)
+                       align = PAGE_SHIFT - IOMMU_PAGE_SHIFT;
+               entry = iommu_range_alloc(tbl, npages, &handle,
+                                         mask >> IOMMU_PAGE_SHIFT, align);
 
                DBG("  - vaddr: %lx, size: %lx\n", vaddr, slen);
 
@@ -572,7 +578,7 @@ dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr,
 {
        dma_addr_t dma_handle = DMA_ERROR_CODE;
        unsigned long uaddr;
-       unsigned int npages;
+       unsigned int npages, align;
 
        BUG_ON(direction == DMA_NONE);
 
@@ -580,8 +586,13 @@ dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr,
        npages = iommu_num_pages(uaddr, size);
 
        if (tbl) {
+               align = 0;
+               if (IOMMU_PAGE_SHIFT < PAGE_SHIFT && size >= PAGE_SIZE &&
+                   ((unsigned long)vaddr & ~PAGE_MASK) == 0)
+                       align = PAGE_SHIFT - IOMMU_PAGE_SHIFT;
+
                dma_handle = iommu_alloc(tbl, vaddr, npages, direction,
-                                        mask >> IOMMU_PAGE_SHIFT, 0);
+                                        mask >> IOMMU_PAGE_SHIFT, align);
                if (dma_handle == DMA_ERROR_CODE) {
                        if (printk_ratelimit())  {
                                printk(KERN_INFO "iommu_alloc failed, "

diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index a282bc2..50d7372 100644 (file)
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -82,14 +82,6 @@ static inline void slb_shadow_clear(unsigned long entry)
        get_slb_shadow()->save_area[entry].esid = 0;
 }
 
-void slb_shadow_clear_all(void)
-{
-       int i;
-
-       for (i = 0; i < SLB_NUM_BOLTED; i++)
-               slb_shadow_clear(i);
-}
-
 static inline void create_shadowed_slbe(unsigned long ea, int ssize,
                                        unsigned long flags,
                                        unsigned long entry)
@@ -300,6 +292,8 @@ void slb_initialize(void)
 
        create_shadowed_slbe(VMALLOC_START, mmu_kernel_ssize, vflags, 1);
 
+       slb_shadow_clear(2);
+
        /* We don't bolt the stack for the time being - we're in boot,
         * so the stack is in the bolted segment.  By the time it goes
         * elsewhere, we'll call _switch() which will bolt in the new

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 34317aa..9a455d4 100644 (file)
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -272,7 +272,6 @@ void vpa_init(int cpu)
         */
        addr = __pa(&slb_shadow[cpu]);
        if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
-               slb_shadow_clear_all();
                ret = register_slb_shadow(hwcpu, addr);
                if (ret)
                        printk(KERN_ERR

diff --git a/include/asm-powerpc/mmu-hash64.h b/include/asm-powerpc/mmu-hash64.h
index 951e248..82328de 100644 (file)
--- a/include/asm-powerpc/mmu-hash64.h
+++ b/include/asm-powerpc/mmu-hash64.h
@@ -286,7 +286,6 @@ extern void hpte_init_iSeries(void);
 extern void hpte_init_beat(void);
 extern void hpte_init_beat_v3(void);
 
-extern void slb_shadow_clear_all(void);
 extern void stabs_alloc(void);
 extern void slb_initialize(void);
 extern void slb_flush_and_rebolt(void);