svn commit: r283367 - in head/sys/arm: conf qemu
Andrew Turner
andrew at FreeBSD.org
Sun May 24 12:33:14 UTC 2015
Author: andrew
Date: Sun May 24 12:33:12 2015
New Revision: 283367
URL: https://svnweb.freebsd.org/changeset/base/283367
Log:
Enable SMP on the qemu virt platform. We use the device tree to find which
cpus to enable, and PSCI to start them.
Added:
head/sys/arm/qemu/virt_mp.c (contents, props changed)
Modified:
head/sys/arm/conf/VIRT
head/sys/arm/qemu/files.qemu
Modified: head/sys/arm/conf/VIRT
==============================================================================
--- head/sys/arm/conf/VIRT Sun May 24 12:20:11 2015 (r283366)
+++ head/sys/arm/conf/VIRT Sun May 24 12:33:12 2015 (r283367)
@@ -24,8 +24,9 @@ include "std.armv6"
include "../qemu/std.virt"
options HZ=100
-options SCHED_4BSD # 4BSD scheduler
+options SCHED_ULE # 4BSD scheduler
options PLATFORM
+options SMP # Enable multiple cores
# Debugging for use in -current
makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols
Modified: head/sys/arm/qemu/files.qemu
==============================================================================
--- head/sys/arm/qemu/files.qemu Sun May 24 12:20:11 2015 (r283366)
+++ head/sys/arm/qemu/files.qemu Sun May 24 12:33:12 2015 (r283367)
@@ -13,5 +13,6 @@ kern/kern_clocksource.c standard
arm/arm/generic_timer.c standard
arm/qemu/virt_common.c standard
arm/qemu/virt_machdep.c standard
+arm/qemu/virt_mp.c optional smp
dev/ofw/ofw_cpu.c standard
Added: head/sys/arm/qemu/virt_mp.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/qemu/virt_mp.c Sun May 24 12:33:12 2015 (r283367)
@@ -0,0 +1,119 @@
+/*-
+ * Copyright (c) 2015 Andrew Turner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/pcpu.h>
+#include <sys/smp.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+
+#include <machine/intr.h>
+#include <machine/smp.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_cpu.h>
+#include <dev/psci/psci.h>
+
+static int running_cpus;
+
+int
+platform_mp_probe(void)
+{
+ int ncpus;
+
+ ncpus = ofw_cpu_early_foreach(NULL, true);
+ if (ncpus <= 1) {
+ mp_ncpus = 1;
+ return (0);
+ }
+
+ mp_ncpus = MIN(ncpus, MAXCPU);
+
+ return (1);
+}
+
+static boolean_t
+virt_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
+{
+
+ if (mp_maxid < id)
+ mp_maxid = id;
+
+ return (true);
+}
+
+void
+platform_mp_setmaxid(void)
+{
+
+ mp_maxid = PCPU_GET(cpuid);
+ ofw_cpu_early_foreach(virt_maxid, true);
+}
+
+static boolean_t
+virt_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
+{
+ int err;
+
+ if (running_cpus >= mp_ncpus)
+ return (false);
+ running_cpus++;
+
+ err = psci_cpu_on(*reg, pmap_kextract((vm_offset_t)mpentry), id);
+
+ if (err != PSCI_RETVAL_SUCCESS)
+ return (false);
+
+ return (true);
+}
+
+void
+platform_mp_start_ap(void)
+{
+
+ ofw_cpu_early_foreach(virt_start_ap, true);
+}
+
+void
+platform_mp_init_secondary(void)
+{
+
+ arm_init_secondary_ic();
+}
+
+void
+platform_ipi_send(cpuset_t cpus, u_int ipi)
+{
+
+ pic_ipi_send(cpus, ipi);
+}
More information about the svn-src-all
mailing list