From ec9fe3b72f8f3554e5a0f578a4e0ff4d2e972d34 Mon Sep 17 00:00:00 2001
From: tobhe <tobhe@openbsd.org>
Date: Sat, 26 Nov 2022 17:23:15 +0000
Subject: [PATCH] Add arm64 lid_action sysctl for Apple Silicon laptops.

ok kettenis@
---
 sys/arch/arm64/arm64/acpi_machdep.c |  3 +--
 sys/arch/arm64/arm64/machdep.c      | 10 ++++++++--
 sys/arch/arm64/dev/aplsmc.c         | 11 ++++++++++-
 sys/arch/arm64/include/cpu.h        |  5 +++--
 4 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/sys/arch/arm64/arm64/acpi_machdep.c b/sys/arch/arm64/arm64/acpi_machdep.c
index abcdfe70b12..425fe8c186b 100644
--- a/sys/arch/arm64/arm64/acpi_machdep.c
+++ b/sys/arch/arm64/arm64/acpi_machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: acpi_machdep.c,v 1.20 2022/09/13 17:14:54 kettenis Exp $	*/
+/*	$OpenBSD: acpi_machdep.c,v 1.21 2022/11/26 17:23:15 tobhe Exp $	*/
 /*
  * Copyright (c) 2018 Mark Kettenis
  *
@@ -36,7 +36,6 @@
 
 #include "apm.h"
 
-int	lid_action;
 int	pwr_action = 1;
 
 int	acpi_fdt_match(struct device *, void *, void *);
diff --git a/sys/arch/arm64/arm64/machdep.c b/sys/arch/arm64/arm64/machdep.c
index 311d8bb9460..0534221d90f 100644
--- a/sys/arch/arm64/arm64/machdep.c
+++ b/sys/arch/arm64/arm64/machdep.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: machdep.c,v 1.77 2022/11/24 14:43:16 kettenis Exp $ */
+/* $OpenBSD: machdep.c,v 1.78 2022/11/26 17:23:15 tobhe Exp $ */
 /*
  * Copyright (c) 2014 Patrick Wildt <patrick@blueri.se>
  * Copyright (c) 2021 Mark Kettenis <kettenis@openbsd.org>
@@ -71,6 +71,7 @@ void (*cpuresetfn)(void);
 void (*powerdownfn)(void);
 
 int cold = 1;
+int lid_action = 0;
 
 struct vm_map *exec_map = NULL;
 struct vm_map *phys_map = NULL;
@@ -322,6 +323,10 @@ extern uint64_t cpu_id_aa64pfr1;
  * machine dependent system variables.
  */
 
+const struct sysctl_bounded_args cpuctl_vars[] = {
+	{ CPU_LIDACTION, &lid_action, 0, 2 },
+};
+
 int
 cpu_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
     size_t newlen, struct proc *p)
@@ -372,7 +377,8 @@ cpu_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
 	case CPU_ID_AA64ZFR0:
 		return sysctl_rdquad(oldp, oldlenp, newp, 0);
 	default:
-		return (EOPNOTSUPP);
+		return (sysctl_bounded_arr(cpuctl_vars, nitems(cpuctl_vars),
+		    name, namelen, oldp, oldlenp, newp, newlen));
 	}
 	/* NOTREACHED */
 }
diff --git a/sys/arch/arm64/dev/aplsmc.c b/sys/arch/arm64/dev/aplsmc.c
index 449a4f7ce66..01737c7c282 100644
--- a/sys/arch/arm64/dev/aplsmc.c
+++ b/sys/arch/arm64/dev/aplsmc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: aplsmc.c,v 1.19 2022/11/25 20:33:11 tobhe Exp $	*/
+/*	$OpenBSD: aplsmc.c,v 1.20 2022/11/26 17:23:15 tobhe Exp $	*/
 /*
  * Copyright (c) 2021 Mark Kettenis <kettenis@openbsd.org>
  *
@@ -37,6 +37,7 @@
 
 #include "apm.h"
 
+extern int lid_action;
 extern void (*simplefb_burn_hook)(u_int);
 
 extern void (*cpuresetfn)(void);
@@ -392,6 +393,14 @@ aplsmc_handle_notification(struct aplsmc_softc *sc, uint64_t data)
 			       sc->sc_dev.dv_xname, data);
 			break;
 		}
+		switch (lid_action) {
+		case 1: 
+			/* XXX: suspend */
+			break;
+		case 2:
+			/* XXX: hibernate */
+			break;
+		}
 		break;
 	default:
 #ifdef APLSMC_DEBUG
diff --git a/sys/arch/arm64/include/cpu.h b/sys/arch/arm64/include/cpu.h
index 30154c3ad41..b7cbad2339d 100644
--- a/sys/arch/arm64/include/cpu.h
+++ b/sys/arch/arm64/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.31 2022/11/24 14:43:16 kettenis Exp $ */
+/* $OpenBSD: cpu.h,v 1.32 2022/11/26 17:23:15 tobhe Exp $ */
 /*
  * Copyright (c) 2016 Dale Rahn <drahn@dalerahn.com>
  *
@@ -36,7 +36,8 @@
 #define	CPU_ID_AA64PFR1		9
 #define	CPU_ID_AA64SMFR0       10
 #define	CPU_ID_AA64ZFR0	       11
-#define	CPU_MAXID	       12	/* number of valid machdep ids */
+#define	CPU_LIDACTION          12
+#define	CPU_MAXID	       13	/* number of valid machdep ids */
 
 #define	CTL_MACHDEP_NAMES { \
 	{ 0, 0 }, \
-- 
2.20.1