From d029cb6152ecc692603ec44312805f84aa4f0140 Mon Sep 17 00:00:00 2001
From: Andrew Turner <andrew@FreeBSD.org>
Date: Tue, 4 Oct 2016 12:01:08 +0000
Subject: [PATCH] Read the Multiprocessing Extensions bit from the
 Multiprocessor Affinity register.

Sponsored by:	ABT Systems Ltd
X-Differential Revision:	https://reviews.freebsd.org/D8092
---
 sys/arm/arm/cpuinfo.c     | 2 ++
 sys/arm/include/cpuinfo.h | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/sys/arm/arm/cpuinfo.c b/sys/arm/arm/cpuinfo.c
index b2d96a7b3ef1..405774df075e 100644
--- a/sys/arm/arm/cpuinfo.c
+++ b/sys/arm/arm/cpuinfo.c
@@ -131,6 +131,8 @@ cpuinfo_init(void)
 	cpuinfo.generic_timer_ext = (cpuinfo.id_pfr1 >> 16) & 0xF;
 	cpuinfo.virtualization_ext = (cpuinfo.id_pfr1 >> 12) & 0xF;
 	cpuinfo.security_ext = (cpuinfo.id_pfr1 >> 4) & 0xF;
+	/* mpidr */
+	cpuinfo.mp_ext = (cpuinfo.mpidr >> 31u) & 0x1;
 
 	/* L1 Cache sizes */
 	if (CPU_CT_FORMAT(cpuinfo.ctr) == CPU_CT_ARMV7) {
diff --git a/sys/arm/include/cpuinfo.h b/sys/arm/include/cpuinfo.h
index 210e4324902b..63043906d44f 100644
--- a/sys/arm/include/cpuinfo.h
+++ b/sys/arm/include/cpuinfo.h
@@ -105,6 +105,9 @@ struct cpuinfo {
 	int dcache_line_mask;
 	int icache_line_size;
 	int icache_line_mask;
+
+	/* mpidr */
+	int mp_ext;
 };
 
 extern struct cpuinfo cpuinfo;