Add radix variants of the memory hotplug mapping functions.
Signed-off-by: Reza Arbab <ar...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/book3s/64/radix.h | 5 +++++
arch/powerpc/include/asm/sparsemem.h | 8 ++++++++
arch/powerpc/mm/pgtable-radix.c | 23 +++++++++++++++++++++++
3 files changed, 36 insertions(+)
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h
b/arch/powerpc/include/asm/book3s/64/radix.h
index df29422..97e71cb 100644
--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -229,6 +229,11 @@ extern void radix__vmemmap_remove_mapping(unsigned long
start,
extern int radix__map_kernel_page(unsigned long ea, unsigned long pa,
pgprot_t flags, unsigned int psz);
+#ifdef CONFIG_MEMORY_HOTPLUG
+int radix__create_section_mapping(unsigned long start, unsigned long end);
+void radix__remove_section_mapping(unsigned long start, unsigned long end);
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
static inline unsigned long radix__get_tree_size(void)
{
unsigned long rts_field;
diff --git a/arch/powerpc/include/asm/sparsemem.h
b/arch/powerpc/include/asm/sparsemem.h
index 5014e0d..42fe87e 100644
--- a/arch/powerpc/include/asm/sparsemem.h
+++ b/arch/powerpc/include/asm/sparsemem.h
@@ -19,12 +19,20 @@
static inline int create_section_mapping(unsigned long start,
unsigned long end)
{
+ if (radix_enabled())
+ return radix__create_section_mapping(start, end);
+
return hash__create_section_mapping(start, end);
}
static inline int remove_section_mapping(unsigned long start,
unsigned long end)
{
+ if (radix_enabled()) {
+ radix__remove_section_mapping(start, end);
+ return 0;
+ }
+
return hash__remove_section_mapping(start, end);
}
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index af897d9..ee0286c 100644
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -527,3 +527,26 @@ int radix__has_transparent_hugepage(void)
return 0;
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+int radix__create_section_mapping(unsigned long start, unsigned long end)
+{
+ unsigned long page_size = 1 << mmu_psize_defs[mmu_linear_psize].shift;
+
+ /* Align to the page size of the linear mapping. */
+ start = _ALIGN_DOWN(start, page_size);
+
+ for (; start < end; start += page_size) {
+ int rc = radix__map_kernel_page(start, __pa(start),
+ PAGE_KERNEL, page_size);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
+
+void radix__remove_section_mapping(unsigned long start, unsigned long end)
+{
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */
--
1.8.3.1
