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Message-Id: <20220704135833.1496303-3-martin.fernandez@eclypsium.com>
Date: Mon, 4 Jul 2022 10:58:26 -0300
From: Martin Fernandez <martin.fernandez@...ypsium.com>
To: linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
platform-driver-x86@...r.kernel.org, linux-mm@...ck.org,
kunit-dev@...glegroups.com, linux-kselftest@...r.kernel.org
Cc: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
ardb@...nel.org, dvhart@...radead.org, andy@...radead.org,
gregkh@...uxfoundation.org, rafael@...nel.org, rppt@...nel.org,
akpm@...ux-foundation.org, daniel.gutson@...ypsium.com,
hughsient@...il.com, alex.bazhaniuk@...ypsium.com,
alison.schofield@...el.com, keescook@...omium.org,
Martin Fernandez <martin.fernandez@...ypsium.com>
Subject: [PATCH v9 2/9] mm/mmzone: Tag pg_data_t with crypto capabilities
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@...ypsium.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;
+
/*
* 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
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