DM: Add support for virtual TPM enabling

Support TPM enable option when launch UOS.

New option: "--vtpm sock_path=$PATH_OF_SWTPM_SOCKET".
If valid option parsed, then init virtual tpm device.

Tracked-On: #1924
Signed-off-by: Qi Yadong <yadong.qi@intel.com>
Reviewed-by: Zhu Bing <bing.zhu@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>

devicemodel/Makefile

@@ -84,6 +84,7 @@ SRCS += hw/platform/rpmb/rpmb_sim.c
 SRCS += hw/platform/rpmb/rpmb_backend.c
 SRCS += hw/platform/tpm/tpm_emulator.c
 SRCS += hw/platform/tpm/tpm_crb.c
+SRCS += hw/platform/tpm/tpm.c
 SRCS += hw/platform/debugexit.c
 SRCS += hw/pci/wdt_i6300esb.c
 SRCS += hw/pci/lpc.c

devicemodel/core/main.c

@@ -64,6 +64,7 @@
 #include "atomic.h"
 #include "vmcfg_config.h"
 #include "vmcfg.h"
+#include "tpm.h"
 
 #define GUEST_NIO_PORT		0x488	/* guest upcalls via i/o port */
 
@@ -157,6 +158,7 @@ usage(int code)
 		"       --ptdev_no_reset: disable reset check for ptdev\n"
 		"       --debugexit: enable debug exit function\n"
 		"       --intr_monitor: enable interrupt storm monitor\n"
+		"       --vtpm2: Virtual TPM2 args: sock_path=$PATH_OF_SWTPM_SOCKET\n"
 		"............its params: threshold/s,probe-period(s),delay_time(ms),delay_duration(ms)\n",
 		progname, (int)strlen(progname), "", (int)strlen(progname), "",
 		(int)strlen(progname), "");
@@ -446,6 +448,8 @@ vm_init_vdevs(struct vmctx *ctx)
 	if (ret < 0)
 		goto pci_fail;
 
+	init_vtpm2(ctx);
+
 	return 0;
 
 pci_fail:
@@ -480,6 +484,7 @@ vm_deinit_vdevs(struct vmctx *ctx)
 	atkbdc_deinit(ctx);
 	pci_irq_deinit(ctx);
 	ioapic_deinit();
+	deinit_vtpm2(ctx);
 }
 
 static void
@@ -703,6 +708,7 @@ enum {
 	CMD_OPT_VMCFG,
 	CMD_OPT_DUMP,
 	CMD_OPT_INTR_MONITOR,
+	CMD_OPT_VTPM2,
 };
 
 static struct option long_options[] = {
@@ -737,6 +743,7 @@ static struct option long_options[] = {
 		CMD_OPT_PTDEV_NO_RESET},
 	{"debugexit",		no_argument,		0, CMD_OPT_DEBUGEXIT},
 	{"intr_monitor",	required_argument,	0, CMD_OPT_INTR_MONITOR},
+	{"vtpm2",		required_argument,	0, CMD_OPT_VTPM2},
 	{0,			0,			0,  0  },
 };
 
@@ -860,6 +867,11 @@ dm_run(int argc, char *argv[])
 			break;
 		case CMD_OPT_DEBUGEXIT:
 			debugexit_enabled = true;
+		case CMD_OPT_VTPM2:
+			if (acrn_parse_vtpm2(optarg) != 0) {
+				errx(EX_USAGE, "invalid vtpm2 param %s", optarg);
+				exit(1);
+			}
 			break;
 		case CMD_OPT_INTR_MONITOR:
 			if (acrn_parse_intr_monitor(optarg) != 0) {

devicemodel/hw/platform/tpm/tpm.c

@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2018 Intel Corporation
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "vmmapi.h"
+#include "tpm.h"
+#include "tpm_internal.h"
+
+static int tpm_debug;
+#define LOG_TAG "tpm: "
+#define DPRINTF(fmt, args...) \
+	do { if (tpm_debug) printf(LOG_TAG "%s:" fmt, __func__, ##args); } while (0)
+#define WPRINTF(fmt, args...) \
+	do { printf(LOG_TAG "%s:" fmt, __func__, ##args); } while (0)
+
+#define STR_MAX_LEN 1024U
+static char *sock_path = NULL;
+
+enum {
+	SOCK_PATH_OPT = 0
+};
+
+char *const token[] = {
+	[SOCK_PATH_OPT] = "sock_path",
+	NULL
+};
+
+int acrn_parse_vtpm2(char *arg)
+{
+	char *value;
+	size_t len = strlen(arg);
+
+	if (len > STR_MAX_LEN)
+		return -1;
+
+	if (SOCK_PATH_OPT == getsubopt(&arg, token, &value)) {
+		if (value == NULL) {
+			DPRINTF("Invalid vtpm socket path\n");
+			return -1;
+		}
+		sock_path = calloc(len + 1, 1);
+		if (!sock_path)
+			return -1;
+		strcpy(sock_path, value);
+	}
+
+	return 0;
+}
+
+void init_vtpm2(struct vmctx *ctx)
+{
+	if (!sock_path) {
+		WPRINTF("Invalid socket path!\n");
+		return;
+	}
+
+	if (init_tpm_emulator(sock_path) < 0) {
+		WPRINTF("Failed init tpm emulator!\n");
+		return;
+	}
+
+	if (init_tpm_crb(ctx) < 0) {
+		WPRINTF("Failed init tpm emulator!\n");
+	}
+}
+
+void deinit_vtpm2(struct vmctx *ctx)
+{
+	if (ctx->tpm_dev) {
+		deinit_tpm_crb(ctx);
+
+		deinit_tpm_emulator();
+	}
+}

devicemodel/include/tpm.h

@@ -39,4 +39,14 @@ enum {
 #define TPM_CRB_REG_SIZE ((CRB_DATA_BUFFER) - (TPM_CRB_MMIO_ADDR))
 #define TPM_CRB_DATA_BUFFER_SIZE ((TPM_CRB_MMIO_SIZE) - (TPM_CRB_REG_SIZE))
 
+/* APIs by tpm.c */
+/* Initialize Virtual TPM2 */
+void init_vtpm2(struct vmctx *ctx);
+
+/* Deinitialize Virtual TPM2 */
+void deinit_vtpm2(struct vmctx *ctx);
+
+/* Parse Virtual TPM option from command line */
+int acrn_parse_vtpm2(char *arg);
+
 #endif