On Mon, Jul 04, 2022 at 10:58:26AM -0300, Martin Fernandez wrote:
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.
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 --git a/include/linux/mmzone.h b/include/linux/mmzone.h index aab70355d64f..6fd4785f1d05 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -883,6 +883,9 @@ typedef struct pglist_data { struct task_struct *kcompactd; bool proactive_compact_trigger; #endif
- bool crypto_capable;
There's already pgdat->flags. Any reason we cannot encode it there?
/* * 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 e008a3df0485..147437329ac7 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -7729,6 +7729,7 @@ 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);
if (start_pfn != end_pfn) { pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid, -- 2.30.2