[PATCH v4 2/5] mm/mmzone: Tag pg_data_t with crypto capabilities
From: Martin Fernandez <hidden>
Date: 2021-12-16 19:23:15
Also in:
linux-efi, lkml, platform-driver-x86
Subsystem:
memory management, memory management - core, memory management - mglru (multi-gen lru), memory management - page allocator, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Vlastimil Babka, Linus Torvalds
Add a new member in the pg_data_t struct tell whether the node corresponding to that pg_data_t is able to do hardware memory encryption. This will be read from sysfs. Signed-off-by: Martin Fernandez <redacted> --- include/linux/mmzone.h | 3 +++ mm/page_alloc.c | 1 + 2 files changed, 4 insertions(+)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 58e744b78c2c..1e4f76a19c62 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h@@ -870,6 +870,9 @@ typedef struct pglist_data { struct task_struct *kcompactd; bool proactive_compact_trigger; #endif + + bool crypto_capable; + /* * This is a per-node reserve of pages that are not available * to userspace allocations.
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c5952749ad40..8bcbd6fa0089 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c@@ -7592,6 +7592,7 @@ static void __init free_area_init_node(int nid) pgdat->node_id = nid; pgdat->node_start_pfn = start_pfn; pgdat->per_cpu_nodestats = NULL; + pgdat->crypto_capable = memblock_node_is_crypto_capable(nid); pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid, (u64)start_pfn << PAGE_SHIFT,
--
2.30.2