1 files changed, 85 insertions, 0 deletions
diff --git a/usr.sbin/bhyve/amd64/spinup_ap.c b/usr.sbin/bhyve/amd64/spinup_ap.c
new file mode 100644
index 000000000000..f874efcd374b
--- /dev/null
+++ b/usr.sbin/bhyve/amd64/spinup_ap.c
@@ -0,0 +1,85 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2012 NetApp, Inc.
+ * 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 NETAPP, INC ``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 NETAPP, INC 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>
+#include <sys/param.h>
+#include <sys/types.h>
+
+#include <machine/vmm.h>
+#include <vmmapi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "bhyverun.h"
+#include "spinup_ap.h"
+
+static void
+spinup_ap_realmode(struct vcpu *newcpu, uint64_t rip)
+{
+	int vector, error;
+	uint16_t cs;
+	uint64_t desc_base;
+	uint32_t desc_limit, desc_access;
+
+	vector = rip >> PAGE_SHIFT;
+
+	/*
+	 * Update the %cs and %rip of the guest so that it starts
+	 * executing real mode code at at 'vector << 12'.
+	 */
+	error = vm_set_register(newcpu, VM_REG_GUEST_RIP, 0);
+	assert(error == 0);
+
+	error = vm_get_desc(newcpu, VM_REG_GUEST_CS, &desc_base,
+			    &desc_limit, &desc_access);
+	assert(error == 0);
+
+	desc_base = vector << PAGE_SHIFT;
+	error = vm_set_desc(newcpu, VM_REG_GUEST_CS,
+			    desc_base, desc_limit, desc_access);
+	assert(error == 0);
+
+	cs = (vector << PAGE_SHIFT) >> 4;
+	error = vm_set_register(newcpu, VM_REG_GUEST_CS, cs);
+	assert(error == 0);
+}
+
+void
+spinup_ap(struct vcpu *newcpu, uint64_t rip)
+{
+	int error;
+
+	error = vcpu_reset(newcpu);
+	assert(error == 0);
+
+	spinup_ap_realmode(newcpu, rip);
+
+	vm_resume_cpu(newcpu);
+}