4 files changed, 41 insertions, 0 deletions

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 73b78486abfc..4cc53f92377e 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -192,6 +192,24 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
         return ret < 0 ? ret : 0;
 }
 
+static void htab_remove_mapping(unsigned long vstart, unsigned long vend,
+                      int psize, int ssize)
+{
+        unsigned long vaddr;
+        unsigned int step, shift;
+
+        shift = mmu_psize_defs[psize].shift;
+        step = 1 << shift;
+
+        if (!ppc_md.hpte_removebolted) {
+                printk("Sub-arch doesn't implement hpte_removebolted\n");
+                return;
+        }
+
+        for (vaddr = vstart; vaddr < vend; vaddr += step)
+                ppc_md.hpte_removebolted(vaddr, psize, ssize);
+}
+
 static int __init htab_dt_scan_seg_sizes(unsigned long node,
                                          const char *uname, int depth,
                                          void *data)
@@ -430,6 +448,11 @@ void create_section_mapping(unsigned long start, unsigned long end)
                         _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | PP_RWXX,
                         mmu_linear_psize, mmu_kernel_ssize));
 }
+
+void remove_section_mapping(unsigned long start, unsigned long end)
+{
+        htab_remove_mapping(start, end, mmu_linear_psize, mmu_kernel_ssize);
+}
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 static inline void make_bl(unsigned int *insn_addr, void *func)
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 9a455d46379d..233d9be25f49 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -520,6 +520,20 @@ static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
         BUG_ON(lpar_rc != H_SUCCESS);
 }
 
+static void pSeries_lpar_hpte_removebolted(unsigned long ea,
+                                           int psize, int ssize)
+{
+        unsigned long slot, vsid, va;
+
+        vsid = get_kernel_vsid(ea, ssize);
+        va = hpt_va(ea, vsid, ssize);
+
+        slot = pSeries_lpar_hpte_find(va, psize, ssize);
+        BUG_ON(slot == -1);
+
+        pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0);
+}
+
 /* Flag bits for H_BULK_REMOVE */
 #define HBR_REQUEST     0x4000000000000000UL
 #define HBR_RESPONSE    0x8000000000000000UL
@@ -597,6 +611,7 @@ void __init hpte_init_lpar(void)
         ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
         ppc_md.hpte_insert      = pSeries_lpar_hpte_insert;
         ppc_md.hpte_remove      = pSeries_lpar_hpte_remove;
+        ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted;
         ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range;
         ppc_md.hpte_clear_all   = pSeries_lpar_hptab_clear;
 }
diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index 0872ec228c1e..b95386aed50d 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -68,6 +68,8 @@ struct machdep_calls {
                                        unsigned long vflags,
                                        int psize, int ssize);
         long            (*hpte_remove)(unsigned long hpte_group);
+        void            (*hpte_removebolted)(unsigned long ea,
+                                             int psize, int ssize);
         void            (*flush_hash_range)(unsigned long number, int local);
 
         /* special for kexec, to be called in real mode, linar mapping is
diff --git a/include/asm-powerpc/sparsemem.h b/include/asm-powerpc/sparsemem.h
index e8b493d52b4f..c5acf4ccf571 100644
--- a/include/asm-powerpc/sparsemem.h
+++ b/include/asm-powerpc/sparsemem.h
@@ -15,6 +15,7 @@
 
 #ifdef CONFIG_MEMORY_HOTPLUG
 extern void create_section_mapping(unsigned long start, unsigned long end);
+extern void remove_section_mapping(unsigned long start, unsigned long end);
 #ifdef CONFIG_NUMA
 extern int hot_add_scn_to_nid(unsigned long scn_addr);
 #else