Merge branch 'for-6.15/amd_sfh' into for-linus

From: Mario Limonciello <mario.limonciello@amd.com>

Some platforms include a human presence detection (HPD) sensor. When
enabled and a user is detected a wake event will be emitted from the
sensor fusion hub that software can react to.

Example use cases are "wake from suspend on approach" or to "lock
when leaving".

This is currently enabled by default on supported systems, but users
can't control it. This essentially means that wake on approach is
enabled which is a really surprising behavior to users that don't
expect it.

Instead of defaulting to enabled add a sysfs knob that users can
use to enable the feature if desirable and set it to disabled by
default.

1 files changed, 38 insertions, 7 deletions

diff --git a/mm/numa_emulation.c b/mm/numa_emulation.c
index 031fb9961bf7b..9d55679d99cee 100644
--- a/mm/numa_emulation.c
+++ b/mm/numa_emulation.c
@@ -8,11 +8,12 @@
 #include <linux/memblock.h>
 #include <linux/numa_memblks.h>
 #include <asm/numa.h>
+#include <acpi/acpi_numa.h>
 
 #define FAKE_NODE_MIN_SIZE	((u64)32 << 20)
 #define FAKE_NODE_MIN_HASH_MASK	(~(FAKE_NODE_MIN_SIZE - 1UL))
 
-static int emu_nid_to_phys[MAX_NUMNODES];
+int emu_nid_to_phys[MAX_NUMNODES];
 static char *emu_cmdline __initdata;
 
 int __init numa_emu_cmdline(char *str)
@@ -379,6 +380,7 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 	size_t phys_size = numa_dist_cnt * numa_dist_cnt * sizeof(phys_dist[0]);
 	int max_emu_nid, dfl_phys_nid;
 	int i, j, ret;
+	nodemask_t physnode_mask = numa_nodes_parsed;
 
 	if (!emu_cmdline)
 		goto no_emu;
@@ -395,7 +397,6 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 	 * split the system RAM into N fake nodes.
 	 */
 	if (strchr(emu_cmdline, 'U')) {
-		nodemask_t physnode_mask = numa_nodes_parsed;
 		unsigned long n;
 		int nid = 0;
 
@@ -465,9 +466,6 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 	 */
 	max_emu_nid = setup_emu2phys_nid(&dfl_phys_nid);
 
-	/* commit */
-	*numa_meminfo = ei;
-
 	/* Make sure numa_nodes_parsed only contains emulated nodes */
 	nodes_clear(numa_nodes_parsed);
 	for (i = 0; i < ARRAY_SIZE(ei.blk); i++)
@@ -475,10 +473,21 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 		    ei.blk[i].nid != NUMA_NO_NODE)
 			node_set(ei.blk[i].nid, numa_nodes_parsed);
 
-	numa_emu_update_cpu_to_node(emu_nid_to_phys, ARRAY_SIZE(emu_nid_to_phys));
+	/* fix pxm_to_node_map[] and node_to_pxm_map[] to avoid collision
+	 * with faked numa nodes, particularly during later memory hotplug
+	 * handling, and also update numa_nodes_parsed accordingly.
+	 */
+	ret = fix_pxm_node_maps(max_emu_nid);
+	if (ret < 0)
+		goto no_emu;
+
+	/* commit */
+	*numa_meminfo = ei;
+
+	numa_emu_update_cpu_to_node(emu_nid_to_phys, max_emu_nid + 1);
 
 	/* make sure all emulated nodes are mapped to a physical node */
-	for (i = 0; i < ARRAY_SIZE(emu_nid_to_phys); i++)
+	for (i = 0; i < max_emu_nid + 1; i++)
 		if (emu_nid_to_phys[i] == NUMA_NO_NODE)
 			emu_nid_to_phys[i] = dfl_phys_nid;
 
@@ -501,12 +510,34 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 			numa_set_distance(i, j, dist);
 		}
 	}
+	for (i = 0; i < numa_distance_cnt; i++) {
+		for (j = 0; j < numa_distance_cnt; j++) {
+			int physi, physj;
+			u8 dist;
+
+			/* distance between fake nodes is already ok */
+			if (emu_nid_to_phys[i] != NUMA_NO_NODE &&
+			    emu_nid_to_phys[j] != NUMA_NO_NODE)
+				continue;
+			if (emu_nid_to_phys[i] != NUMA_NO_NODE)
+				physi = emu_nid_to_phys[i];
+			else
+				physi = i - max_emu_nid;
+			if (emu_nid_to_phys[j] != NUMA_NO_NODE)
+				physj = emu_nid_to_phys[j];
+			else
+				physj = j - max_emu_nid;
+			dist = phys_dist[physi * numa_dist_cnt + physj];
+			numa_set_distance(i, j, dist);
+		}
+	}
 
 	/* free the copied physical distance table */
 	memblock_free(phys_dist, phys_size);
 	return;
 
 no_emu:
+	numa_nodes_parsed = physnode_mask;
 	/* No emulation.  Build identity emu_nid_to_phys[] for numa_add_cpu() */
 	for (i = 0; i < ARRAY_SIZE(emu_nid_to_phys); i++)
 		emu_nid_to_phys[i] = i;