hv: Add reboot shell command

To trigger warm reboot for debugging.

Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <Eddie.dong@intel.com>

hypervisor/Makefile

@@ -117,6 +117,7 @@ C_SRCS += arch/x86/guest/vioapic.c
 C_SRCS += arch/x86/guest/instr_emul.c
 C_SRCS += arch/x86/guest/ucode.c
 C_SRCS += arch/x86/guest/pm.c
+C_SRCS += arch/x86/debug/reboot.c
 C_SRCS += lib/spinlock.c
 C_SRCS += lib/udelay.c
 C_SRCS += lib/mdelay.c

hypervisor/arch/x86/debug/reboot.c

@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) <2018> Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <acrn_common.h>
+#include <io.h>
+
+int warm_reboot(void)
+{
+	io_write_byte(0x6, 0xcf9);
+	return 0;
+}

hypervisor/debug/shell_internal.c

@@ -33,6 +33,7 @@
 #include <hv_arch.h>
 #include <hv_debug.h>
 #include <hypercall.h>
+#include <reboot.h>
 #include "shell_internal.h"
 #include "serial_internal.h"
 
@@ -931,6 +932,12 @@ int shell_show_ptdev_info(struct shell *p_shell,
 	return 0;
 }
 
+int shell_reboot(__unused struct shell *p_shell,
+		__unused int argc, __unused char **argv)
+{
+	return warm_reboot();
+}
+
 int shell_show_req_info(struct shell *p_shell,
 		__unused int argc, __unused char **argv)
 {

hypervisor/debug/shell_internal.h

@@ -117,6 +117,10 @@ struct shell_cmd {
 #define SHELL_CMD_PTDEV_PARAM		NULL
 #define SHELL_CMD_PTDEV_HELP		"show pass-through device info"
 
+#define SHELL_CMD_REBOOT		"reboot"
+#define SHELL_CMD_REBOOT_PARAM		NULL
+#define SHELL_CMD_REBOOT_HELP		"trigger system warm reboot"
+
 #define SHELL_CMD_REQ			"lsreq"
 #define SHELL_CMD_REQ_PARAM		NULL
 #define SHELL_CMD_REQ_HELP		"show ioreq info"
@@ -170,6 +174,7 @@ int shell_trace_cmd(struct shell *p_shell, int argc, char **argv);
 int shell_to_sos_console(struct shell *p_shell, int argc, char **argv);
 int shell_show_cpu_int(struct shell *p_shell, int argc, char **argv);
 int shell_show_ptdev_info(struct shell *p_shell, int argc, char **argv);
+int shell_reboot(struct shell *p_shell, int argc, char **argv);
 int shell_show_vioapic_info(struct shell *p_shell, int argc, char **argv);
 int shell_show_ioapic_info(struct shell *p_shell, int argc, char **argv);
 int shell_show_vmexit_profile(struct shell *p_shell, int argc, char **argv);

hypervisor/debug/shell_public.c

@@ -147,6 +147,12 @@ static struct shell_cmd acrn_cmd[] = {
 		.help_str	= SHELL_CMD_CPUID_HELP,
 		.fcn		= shell_cpuid,
 	},
+	{
+		.str		= SHELL_CMD_REBOOT,
+		.cmd_param	= SHELL_CMD_REBOOT_PARAM,
+		.help_str	= SHELL_CMD_REBOOT_HELP,
+		.fcn		= shell_reboot,
+	},
 };
 
 int shell_init(void)

hypervisor/include/arch/x86/reboot.h

@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) <2018> Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef	REBOOT_H
+#define	REBOOT_H
+
+int warm_reboot(void);
+#endif