diff mbox series

[v2,2/5] mm/mmzone: Tag pg_data_t with crypto capabilities

Message ID 20211124203459.4578-3-martin.fernandez@eclypsium.com (mailing list archive)
State New
Headers show
Series x86: Show in sysfs if a memory node is able to do encryption | expand

Commit Message

Martin Fernandez Nov. 24, 2021, 8:34 p.m. UTC 
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 <martin.fernandez@eclypsium.com>
---
 include/linux/mmzone.h | 3 +++
 mm/page_alloc.c        | 1 +
 2 files changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 6a1d79d84675..e437d7ebd8cc 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -855,6 +855,9 @@  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 b37435c274cf..a19d95bb5c0f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7575,6 +7575,7 @@  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,