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, 69 insertions, 0 deletions

diff --git a/arch/x86/coco/tdx/debug.c b/arch/x86/coco/tdx/debug.c
new file mode 100644
index 0000000000000..cef847c8bb67f
--- /dev/null
+++ b/arch/x86/coco/tdx/debug.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#undef pr_fmt
+#define pr_fmt(fmt)     "tdx: " fmt
+
+#include <linux/array_size.h>
+#include <linux/printk.h>
+#include <asm/tdx.h>
+
+#define DEF_TDX_ATTR_NAME(_name) [TDX_ATTR_##_name##_BIT] = __stringify(_name)
+
+static __initdata const char *tdx_attributes[] = {
+	DEF_TDX_ATTR_NAME(DEBUG),
+	DEF_TDX_ATTR_NAME(HGS_PLUS_PROF),
+	DEF_TDX_ATTR_NAME(PERF_PROF),
+	DEF_TDX_ATTR_NAME(PMT_PROF),
+	DEF_TDX_ATTR_NAME(ICSSD),
+	DEF_TDX_ATTR_NAME(LASS),
+	DEF_TDX_ATTR_NAME(SEPT_VE_DISABLE),
+	DEF_TDX_ATTR_NAME(MIGRTABLE),
+	DEF_TDX_ATTR_NAME(PKS),
+	DEF_TDX_ATTR_NAME(KL),
+	DEF_TDX_ATTR_NAME(TPA),
+	DEF_TDX_ATTR_NAME(PERFMON),
+};
+
+#define DEF_TD_CTLS_NAME(_name) [TD_CTLS_##_name##_BIT] = __stringify(_name)
+
+static __initdata const char *tdcs_td_ctls[] = {
+	DEF_TD_CTLS_NAME(PENDING_VE_DISABLE),
+	DEF_TD_CTLS_NAME(ENUM_TOPOLOGY),
+	DEF_TD_CTLS_NAME(VIRT_CPUID2),
+	DEF_TD_CTLS_NAME(REDUCE_VE),
+	DEF_TD_CTLS_NAME(LOCK),
+};
+
+void __init tdx_dump_attributes(u64 td_attr)
+{
+	pr_info("Attributes:");
+
+	for (int i = 0; i < ARRAY_SIZE(tdx_attributes); i++) {
+		if (!tdx_attributes[i])
+			continue;
+		if (td_attr & BIT(i))
+			pr_cont(" %s", tdx_attributes[i]);
+		td_attr &= ~BIT(i);
+	}
+
+	if (td_attr)
+		pr_cont(" unknown:%#llx", td_attr);
+	pr_cont("\n");
+
+}
+
+void __init tdx_dump_td_ctls(u64 td_ctls)
+{
+	pr_info("TD_CTLS:");
+
+	for (int i = 0; i < ARRAY_SIZE(tdcs_td_ctls); i++) {
+		if (!tdcs_td_ctls[i])
+			continue;
+		if (td_ctls & BIT(i))
+			pr_cont(" %s", tdcs_td_ctls[i]);
+		td_ctls &= ~BIT(i);
+	}
+	if (td_ctls)
+		pr_cont(" unknown:%#llx", td_ctls);
+	pr_cont("\n");
+}