This application uses the misc device /dev/tdx-attest to get TDREPORT
from the TDX Module or request quote from the VMM.

It tests following attestation features:

  - Get report using TDX_CMD_GET_TDREPORT IOCTL.
  - Using report data request quote from VMM using TDX_CMD_GEN_QUOTE IOCTL.
  - Get the quote size using TDX_CMD_GET_QUOTE_SIZE IOCTL.

Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Andi Kleen <redacted>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
 tools/Makefile                     |  13 +-
 tools/tdx/Makefile                 |  19 +++
 tools/tdx/attest/.gitignore        |   2 +
 tools/tdx/attest/Makefile          |  24 +++
 tools/tdx/attest/tdx-attest-test.c | 232 +++++++++++++++++++++++++++++
 5 files changed, 284 insertions(+), 6 deletions(-)
 create mode 100644 tools/tdx/Makefile
 create mode 100644 tools/tdx/attest/.gitignore
 create mode 100644 tools/tdx/attest/Makefile
 create mode 100644 tools/tdx/attest/tdx-attest-test.c

diff --git a/tools/Makefile b/tools/Makefile
index 7e9d34ddd74c..5d68084511cb 100644
--- a/tools/Makefile
+++ b/tools/Makefile

@@ -30,6 +30,7 @@ help:
 	@echo '  selftests              - various kernel selftests'
 	@echo '  bootconfig             - boot config tool'
 	@echo '  spi                    - spi tools'
+	@echo '  tdx                    - TDX related test tools'
 	@echo '  tmon                   - thermal monitoring and tuning tool'
 	@echo '  tracing                - misc tracing tools'
 	@echo '  turbostat              - Intel CPU idle stats and freq reporting tool'

@@ -65,7 +66,7 @@ acpi: FORCE
 cpupower: FORCE
 	$(call descend,power/$@)
 
-cgroup firewire hv guest bootconfig spi usb virtio vm bpf iio gpio objtool leds wmi pci firmware debugging tracing: FORCE
+cgroup firewire hv guest bootconfig spi usb virtio vm bpf iio gpio objtool leds wmi pci firmware debugging tracing tdx: FORCE
 	$(call descend,$@)
 
 bpf/%: FORCE

@@ -104,7 +105,7 @@ all: acpi cgroup cpupower gpio hv firewire liblockdep \
 		perf selftests bootconfig spi turbostat usb \
 		virtio vm bpf x86_energy_perf_policy \
 		tmon freefall iio objtool kvm_stat wmi \
-		pci debugging tracing
+		pci debugging tracing tdx
 
 acpi_install:
 	$(call descend,power/$(@:_install=),install)

@@ -112,7 +113,7 @@ acpi_install:
 cpupower_install:
 	$(call descend,power/$(@:_install=),install)
 
-cgroup_install firewire_install gpio_install hv_install iio_install perf_install bootconfig_install spi_install usb_install virtio_install vm_install bpf_install objtool_install wmi_install pci_install debugging_install tracing_install:
+cgroup_install firewire_install gpio_install hv_install iio_install perf_install bootconfig_install spi_install usb_install virtio_install vm_install bpf_install objtool_install wmi_install pci_install debugging_install tracing_install tdx_install:
 	$(call descend,$(@:_install=),install)
 
 liblockdep_install:

@@ -139,7 +140,7 @@ install: acpi_install cgroup_install cpupower_install gpio_install \
 		virtio_install vm_install bpf_install x86_energy_perf_policy_install \
 		tmon_install freefall_install objtool_install kvm_stat_install \
 		wmi_install pci_install debugging_install intel-speed-select_install \
-		tracing_install
+		tracing_install tdx_install
 
 acpi_clean:
 	$(call descend,power/acpi,clean)

@@ -147,7 +148,7 @@ acpi_clean:
 cpupower_clean:
 	$(call descend,power/cpupower,clean)
 
-cgroup_clean hv_clean firewire_clean bootconfig_clean spi_clean usb_clean virtio_clean vm_clean wmi_clean bpf_clean iio_clean gpio_clean objtool_clean leds_clean pci_clean firmware_clean debugging_clean tracing_clean:
+cgroup_clean hv_clean firewire_clean bootconfig_clean spi_clean usb_clean virtio_clean vm_clean wmi_clean bpf_clean iio_clean gpio_clean objtool_clean leds_clean pci_clean firmware_clean debugging_clean tracing_clean tdx_clean:
 	$(call descend,$(@:_clean=),clean)
 
 liblockdep_clean:

@@ -186,6 +187,6 @@ clean: acpi_clean cgroup_clean cpupower_clean hv_clean firewire_clean \
 		vm_clean bpf_clean iio_clean x86_energy_perf_policy_clean tmon_clean \
 		freefall_clean build_clean libbpf_clean libsubcmd_clean liblockdep_clean \
 		gpio_clean objtool_clean leds_clean wmi_clean pci_clean firmware_clean debugging_clean \
-		intel-speed-select_clean tracing_clean
+		intel-speed-select_clean tracing_clean tdx_clean
 
 .PHONY: FORCE

diff --git a/tools/tdx/Makefile b/tools/tdx/Makefile
new file mode 100644
index 000000000000..e2564557d463
--- /dev/null
+++ b/tools/tdx/Makefile

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+include ../scripts/Makefile.include
+
+all: attest
+
+clean: attest_clean
+
+install: attest_install
+
+attest:
+	$(call descend,attest)
+
+attest_install:
+	$(call descend,attest,install)
+
+attest_clean:
+	$(call descend,attest,clean)
+
+.PHONY: all install clean attest latency_install latency_clean

diff --git a/tools/tdx/attest/.gitignore b/tools/tdx/attest/.gitignore
new file mode 100644
index 000000000000..5f819a8a6c49
--- /dev/null
+++ b/tools/tdx/attest/.gitignore

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+tdx-attest-test

diff --git a/tools/tdx/attest/Makefile b/tools/tdx/attest/Makefile
new file mode 100644
index 000000000000..bf47ba718386
--- /dev/null
+++ b/tools/tdx/attest/Makefile

@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for vm tools
+#
+VAR_CFLAGS := $(shell pkg-config --cflags libtracefs 2>/dev/null)
+VAR_LDLIBS := $(shell pkg-config --libs libtracefs 2>/dev/null)
+
+TARGETS = tdx-attest-test
+CFLAGS = -static -Wall -Wextra -g -O2 $(VAR_CFLAGS)
+LDFLAGS = -lpthread $(VAR_LDLIBS)
+
+all: $(TARGETS)
+
+%: %.c
+	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+
+clean:
+	$(RM) tdx-attest-test
+
+prefix ?= /usr/local
+sbindir ?= ${prefix}/sbin
+
+install: all
+	install -d $(DESTDIR)$(sbindir)
+	install -m 755 -p $(TARGETS) $(DESTDIR)$(sbindir)

diff --git a/tools/tdx/attest/tdx-attest-test.c b/tools/tdx/attest/tdx-attest-test.c
new file mode 100644
index 000000000000..7634ec6a084c
--- /dev/null
+++ b/tools/tdx/attest/tdx-attest-test.c

@@ -0,0 +1,232 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * tdx-attest-test.c - utility to test TDX attestation feature.
+ *
+ * Copyright (C) 2020 - 2021 Intel Corporation. All rights reserved.
+ *
+ * Author: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <getopt.h>
+#include <stdint.h> /* uintmax_t */
+#include <sys/mman.h>
+#include <unistd.h> /* sysconf */
+#include <time.h>
+
+#include "../../../include/uapi/misc/tdx.h"
+
+#define devname		"/dev/tdx-attest"
+
+#define HEX_DUMP_SIZE	16
+#define MAX_ROW_SIZE	70
+
+#define ATTESTATION_TEST_BIN_VERSION "0.1"
+
+struct tdx_attest_args {
+	bool is_dump_data;
+	bool is_get_tdreport;
+	bool is_get_quote_size;
+	bool is_gen_quote;
+	bool debug_mode;
+	char *out_file;
+};
+
+static void print_hex_dump(const char *title, const char *prefix_str,
+			   const void *buf, int len)
+{
+	const __u8 *ptr = buf;
+	int i, rowsize = HEX_DUMP_SIZE;
+
+	if (!len || !buf)
+		return;
+
+	printf("\t\t%s", title);
+
+	for (i = 0; i < len; i++) {
+		if (!(i % rowsize))
+			printf("\n%s%.8x:", prefix_str, i);
+		printf(" %.2x", ptr[i])
+	}
+
+	printf("\n");
+}
+
+static void gen_report_data(__u8 *report_data, bool dump_data)
+{
+	int i;
+
+	srand(time(NULL));
+
+	for (i = 0; i < TDX_REPORT_DATA_LEN; i++)
+		report_data[i] = rand();
+
+	if (dump_data)
+		print_hex_dump("\n\t\tTDX report data\n", " ",
+			       report_data, TDX_REPORT_DATA_LEN);
+}
+
+static int get_tdreport(int devfd, bool dump_data, __u8 *report_data)
+{
+	__u8 tdrdata[TDX_TDREPORT_LEN] = {0};
+	int ret;
+
+	if (!report_data)
+		report_data = tdrdata;
+
+	gen_report_data(report_data, dump_data);
+
+	ret = ioctl(devfd, TDX_CMD_GET_TDREPORT, report_data);
+	if (ret) {
+		printf("TDX_CMD_GET_TDREPORT ioctl() %d failed\n", ret);
+		return -EIO;
+	}
+
+	if (dump_data)
+		print_hex_dump("\n\t\tTDX tdreport data\n", " ", report_data,
+			       TDX_TDREPORT_LEN);
+
+	return 0;
+}
+
+static __u64 get_quote_size(int devfd)
+{
+	int ret;
+	__u64 quote_size;
+
+	ret = ioctl(devfd, TDX_CMD_GET_QUOTE_SIZE, &quote_size);
+	if (ret) {
+		printf("TDX_CMD_GET_QUOTE_SIZE ioctl() %d failed\n", ret);
+		return -EIO;
+	}
+
+	printf("Quote size: %lld\n", quote_size);
+
+	return quote_size;
+}
+
+static int gen_quote(int devfd, bool dump_data)
+{
+	__u8 *quote_data;
+	__u64 quote_size;
+	int ret;
+
+	quote_size = get_quote_size(devfd);
+
+	quote_data = malloc(sizeof(char) * quote_size);
+	if (!quote_data) {
+		printf("%s queue data alloc failed\n", devname);
+		return -ENOMEM;
+	}
+
+	ret = get_tdreport(devfd, dump_data, quote_data);