[PATCH 2/5] Extend pg_data_t to hold information about memory encryption

[Martin Fernandez <martin.fernandez@eclypsium.com>]

Add a new member in the pg_data_t struct to tell whether the node
corresponding to that pg_data_t is able to do hardware memory encryption.

Signed-off-by: Martin Fernandez <martin.fernandez@eclypsium.com>
---
 include/linux/mmzone.h | 2 ++
 mm/page_alloc.c        | 1 +
 2 files changed, 3 insertions(+)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 6a1d79d84675..998fbe371a81 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -869,6 +869,8 @@ typedef struct pglist_data {
 	unsigned long		min_slab_pages;
 #endif /* CONFIG_NUMA */

+	bool crypto_capable;
+
 	/* Write-intensive fields used by page reclaim */
 	ZONE_PADDING(_pad1_)

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,
--
2.30.2