Clear the HCA access count value on allocation.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
---
arch/powerpc/include/asm/page.h | 5 +++++
arch/powerpc/mm/hca.c | 13 +++++++++++++
2 files changed, 18 insertions(+)
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
index edf1dd1b0ca9..515423744193 100644
--- a/arch/powerpc/include/asm/page.h
+++ b/arch/powerpc/include/asm/page.h
@@ -319,6 +319,11 @@ void arch_free_page(struct page *page, int order);
#define HAVE_ARCH_FREE_PAGE
#endif
+#ifdef CONFIG_PPC_HCA_HOTNESS
+void arch_alloc_page(struct page *page, int order);
+#define HAVE_ARCH_ALLOC_PAGE
+#endif
+
struct vm_area_struct;
extern unsigned long kernstart_virt_addr;
diff --git a/arch/powerpc/mm/hca.c b/arch/powerpc/mm/hca.c
index af6de4492ead..1e79ea89df1b 100644
--- a/arch/powerpc/mm/hca.c
+++ b/arch/powerpc/mm/hca.c
@@ -261,6 +261,19 @@ static void hca_debugfs_init(void)
hca_backend_debugfs_init(hca_debugfs_root);
}
+void arch_alloc_page(struct page *page, int order)
+{
+ int i;
+
+ if (!hca_clear_entry)
+ return;
+
+ /* zero the counter value when we allocate the page */
+ for (i = 0; i < (1 << order); i++)
+ hca_clear_entry(page_to_pfn(page + i));
+}
+EXPORT_SYMBOL(arch_alloc_page);
+
static int __init hca_init(void)
{
if (!hca_backend_debugfs_init) {
--
2.39.2
