2 files changed, 14 insertions, 3 deletions

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 590f1f67c874..a83dfa3cf40c 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -351,9 +351,14 @@ static void __init htab_init_page_sizes(void)
                 mmu_vmalloc_psize = MMU_PAGE_64K;
                 if (mmu_linear_psize == MMU_PAGE_4K)
                         mmu_linear_psize = MMU_PAGE_64K;
-                if (cpu_has_feature(CPU_FTR_CI_LARGE_PAGE))
-                        mmu_io_psize = MMU_PAGE_64K;
-                else
+                if (cpu_has_feature(CPU_FTR_CI_LARGE_PAGE)) {
+                        /*
+                         * Don't use 64k pages for ioremap on pSeries, since
+                         * that would stop us accessing the HEA ethernet.
+                         */
+                        if (!machine_is(pseries))
+                                mmu_io_psize = MMU_PAGE_64K;
+                } else
                         mmu_ci_restrictions = 1;
         }
 #endif /* CONFIG_PPC_64K_PAGES */
diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index 47b06bad24ad..906daeda59a8 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -124,6 +124,12 @@ void slb_flush_and_rebolt(void)
                 ksp_vsid_data = get_slb_shadow()->save_area[2].vsid;
         }
 
+        /*
+         * We can't take a PMU exception in the following code, so hard
+         * disable interrupts.
+         */
+        hard_irq_disable();
+
         /* We need to do this all in asm, so we're sure we don't touch
          * the stack between the slbia and rebolting it. */
         asm volatile("isync\n"