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From: Nathan Whitehorn <nwhitehorn@FreeBSD.org>
Date: Sat, 25 Nov 2017 21:46:51 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r326204 - head/sys/dev/ofw
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Author: nwhitehorn
Date: Sat Nov 25 21:46:51 2017
New Revision: 326204
URL: https://svnweb.freebsd.org/changeset/base/326204

Log:
  Do not bind to CPUs with SMT, which use a different CPU numbering convention
  that does not play well with this driver.
  
  MFC after:	2 weeks

Modified:
  head/sys/dev/ofw/ofw_cpu.c

Modified: head/sys/dev/ofw/ofw_cpu.c
==============================================================================
--- head/sys/dev/ofw/ofw_cpu.c	Sat Nov 25 21:45:51 2017	(r326203)
+++ head/sys/dev/ofw/ofw_cpu.c	Sat Nov 25 21:46:51 2017	(r326204)
@@ -191,6 +191,10 @@ ofw_cpu_probe(device_t dev)
 	if (type == NULL || strcmp(type, "cpu") != 0)
 		return (ENXIO);
 
+	/* Skip SMT CPUs, which we can't reasonably represent with this code */
+	if (OF_hasprop(ofw_bus_get_node(dev), "ibm,ppc-interrupt-server#s"))
+		return (ENXIO);
+
 	device_set_desc(dev, "Open Firmware CPU");
 	return (0);
 }