From patchwork Mon Dec 13 17:59:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "David E. Box" X-Patchwork-Id: 12674475 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BA09C41535 for ; Mon, 13 Dec 2021 17:59:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241472AbhLMR7b (ORCPT ); Mon, 13 Dec 2021 12:59:31 -0500 Received: from mga06.intel.com ([134.134.136.31]:33554 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241395AbhLMR72 (ORCPT ); Mon, 13 Dec 2021 12:59:28 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10197"; a="299571862" X-IronPort-AV: E=Sophos;i="5.88,203,1635231600"; d="scan'208";a="299571862" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Dec 2021 09:59:26 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,203,1635231600"; d="scan'208";a="464731996" Received: from linux.intel.com ([10.54.29.200]) by orsmga006.jf.intel.com with ESMTP; 13 Dec 2021 09:59:26 -0800 Received: from debox1-desk4.intel.com (unknown [10.212.243.203]) by linux.intel.com (Postfix) with ESMTP id 2ED74580C95; Mon, 13 Dec 2021 09:59:26 -0800 (PST) From: "David E. Box" To: lee.jones@linaro.org, hdegoede@redhat.com, david.e.box@linux.intel.com, bhelgaas@google.com, gregkh@linuxfoundation.org, andriy.shevchenko@linux.intel.com, srinivas.pandruvada@intel.com, mgross@linux.intel.com Cc: linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH V3 5/6] tools arch x86: Add Intel SDSi provisioning tool Date: Mon, 13 Dec 2021 09:59:20 -0800 Message-Id: <20211213175921.1897860-6-david.e.box@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211213175921.1897860-1-david.e.box@linux.intel.com> References: <20211213175921.1897860-1-david.e.box@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add tool for key certificate and activation payload provisioning on Intel CPUs supporting Software Defined Silicon (SDSi). Signed-off-by: David E. Box --- V3 - Move from samples to tools. - Fix bit fields in availability structure - Check provisioning availability before issuing command V2 - New patch MAINTAINERS | 1 + tools/arch/x86/intel_sdsi/Makefile | 9 + tools/arch/x86/intel_sdsi/sdsi.c | 540 +++++++++++++++++++++++++++++ 3 files changed, 550 insertions(+) create mode 100644 tools/arch/x86/intel_sdsi/Makefile create mode 100644 tools/arch/x86/intel_sdsi/sdsi.c diff --git a/MAINTAINERS b/MAINTAINERS index af7f17e7400f..500b49e6958a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9787,6 +9787,7 @@ INTEL SDSI DRIVER M: David E. Box S: Supported F: drivers/platform/x86/intel/sdsi.c +F: tools/arch/x86/intel_sdsi/ INTEL SKYLAKE INT3472 ACPI DEVICE DRIVER M: Daniel Scally diff --git a/tools/arch/x86/intel_sdsi/Makefile b/tools/arch/x86/intel_sdsi/Makefile new file mode 100644 index 000000000000..1c2d102ff8fb --- /dev/null +++ b/tools/arch/x86/intel_sdsi/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0 + +.PHONY: sdsi + +sdsi: sdsi.o + $(CC) -Wall $^ -o $@ + +clean: + rm *.o sdsi diff --git a/tools/arch/x86/intel_sdsi/sdsi.c b/tools/arch/x86/intel_sdsi/sdsi.c new file mode 100644 index 000000000000..fda4d3c35d1b --- /dev/null +++ b/tools/arch/x86/intel_sdsi/sdsi.c @@ -0,0 +1,540 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * sdsi: Intel Software Defined Silicon tool for provisioning certificates + * and activation payloads on supported cpus. + * + * See https://github.com/intel/intel-sdsi/blob/master/os-interface.rst + * for register descriptions. + * + * Copyright (C) 2021 Intel Corporation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define SDSI_DEV "intel_vsec.sdsi" +#define AUX_DEV_PATH "/sys/bus/auxiliary/devices/" +#define SDSI_PATH (AUX_DEV_DIR SDSI_DEV) +#define GUID 0x6dd191 +#define REGISTERS_MIN_SIZE 72 + +#define __round_mask(x, y) ((__typeof__(x))((y) - 1)) +#define round_up(x, y) ((((x) - 1) | __round_mask(x, y)) + 1) + +struct enabled_features { + uint64_t reserved:3; + uint64_t sdsi:1; + uint64_t reserved1:60; +}; + +struct auth_fail_count { + uint64_t key_failure_count:3; + uint64_t key_failure_threshold:3; + uint64_t auth_failure_count:3; + uint64_t auth_failure_threshold:3; + uint64_t reserved:52; +}; + +struct availability { + uint64_t reserved:48; + uint64_t available:3; + uint64_t threshold:3; +}; + +struct sdsi_regs { + uint64_t ppin; + uint64_t reserved; + struct enabled_features en_features; + uint64_t reserved1; + struct auth_fail_count auth_fail_count; + struct availability prov_avail; + uint64_t reserved2; + uint64_t reserved3; + uint64_t socket_id; +}; + +struct sdsi_dev { + struct sdsi_regs regs; + char *dev_name; + char *dev_path; + int guid; +}; + +enum command { + CMD_NONE, + CMD_LIST_DEVICES, + CMD_SOCKET_INFO, + CMD_DUMP_CERT, + CMD_PROV_AKC, + CMD_PROV_CAP, +}; + +static void sdsi_list_devices(void) +{ + struct dirent *entry; + DIR *aux_dir; + bool found = false; + + aux_dir = opendir(AUX_DEV_PATH); + if (!aux_dir) { + fprintf(stderr, "Cannot open directory %s\n", AUX_DEV_PATH); + return; + } + + while ((entry = readdir(aux_dir))) { + if (!strncmp(SDSI_DEV, entry->d_name, strlen(SDSI_DEV))) { + found = true; + printf("%s\n", entry->d_name); + } + } + + if (!found) + fprintf(stderr, "No sdsi devices found.\n"); +} + +static int sdsi_update_registers(struct sdsi_dev *s) +{ + FILE *regs_ptr; + int ret; + + memset(&s->regs, 0, sizeof(s->regs)); + + /* Open the registers file */ + ret = chdir(s->dev_path); + if (ret == -1) { + perror("chdir"); + return ret; + } + + regs_ptr = fopen("registers", "r"); + if (!regs_ptr) { + perror("Could not open 'registers' file"); + return -1; + } + + if (s->guid != GUID) { + fprintf(stderr, "Unrecognized guid, 0x%x\n", s->guid); + fclose(regs_ptr); + return -1; + } + + /* Update register info for this guid */ + ret = fread(&s->regs, sizeof(uint8_t), sizeof(s->regs), regs_ptr); + if (ret != sizeof(s->regs)) { + fprintf(stderr, "Could not read 'registers' file\n"); + fclose(regs_ptr); + return -1; + } + + fclose(regs_ptr); + + return 0; +} + +static int sdsi_read_reg(struct sdsi_dev *s) +{ + int ret; + + ret = sdsi_update_registers(s); + if (ret) + return ret; + + /* Print register info for this guid */ + printf("\n"); + printf("Socket information for device %s\n", s->dev_name); + printf("\n"); + printf("PPIN: 0x%lx\n", s->regs.ppin); + printf("Enabled Features\n"); + printf(" SDSi: %s\n", !!s->regs.en_features.sdsi ? "Enabled" : "Disabled"); + printf("Authorization Failure Count\n"); + printf(" AKC Failure Count: %d\n", s->regs.auth_fail_count.key_failure_count); + printf(" AKC Failure Threshold: %d\n", s->regs.auth_fail_count.key_failure_threshold); + printf(" CAP Failure Count: %d\n", s->regs.auth_fail_count.auth_failure_count); + printf(" CAP Failure Threshold: %d\n", s->regs.auth_fail_count.auth_failure_threshold); + printf("Provisioning Availability\n"); + printf(" Updates Available: %d\n", s->regs.prov_avail.available); + printf(" Updates Threshold: %d\n", s->regs.prov_avail.threshold); + printf("Socket ID: %ld\n", s->regs.socket_id & 0xF); + + return 0; +} + +static int sdsi_certificate_dump(struct sdsi_dev *s) +{ + uint64_t state_certificate[512] = {0}; + bool first_instance; + uint64_t previous; + FILE *cert_ptr; + int i, ret, size; + + ret = sdsi_update_registers(s); + if (ret) + return ret; + + if (!s->regs.en_features.sdsi) { + fprintf(stderr, "SDSi feature is present but not enabled."); + fprintf(stderr, " Unable to read state certificate"); + return -1; + } + + ret = chdir(s->dev_path); + if (ret == -1) { + perror("chdir"); + return ret; + } + + cert_ptr = fopen("state_certificate", "r"); + if (!cert_ptr) { + perror("Could not open 'state_certificate' file"); + return -1; + } + + size = fread(state_certificate, 1, sizeof(state_certificate), cert_ptr); + if (!size) { + fprintf(stderr, "Could not read 'state_certificate' file\n"); + fclose(cert_ptr); + return -1; + } + + printf("%3d: 0x%lx\n", 0, state_certificate[0]); + previous = state_certificate[0]; + first_instance = true; + + for (i = 1; i < (round_up(size, sizeof(uint64_t))/sizeof(uint64_t)); i++) { + if (state_certificate[i] == previous) { + if (first_instance) { + puts("*"); + first_instance = false; + } + continue; + } + printf("%3d: 0x%lx\n", i, state_certificate[i]); + previous = state_certificate[i]; + first_instance = true; + } + printf("%3d\n", i); + + fclose(cert_ptr); + + return 0; +} + +static int sdsi_provision(struct sdsi_dev *s, char *bin_file, enum command command) +{ + int bin_fd, prov_fd, size, ret; + char buf[4096] = { 0 }; + char cap[] = "provision_cap"; + char akc[] = "provision_akc"; + char *prov_file; + + if (!bin_file) { + fprintf(stderr, "No binary file provided\n"); + return -1; + } + + /* Open the binary */ + bin_fd = open(bin_file, O_RDONLY); + if (bin_fd == -1) { + fprintf(stderr, "Could not open file %s: %s\n", bin_file, strerror(errno)); + return bin_fd; + } + + prov_file = (command == CMD_PROV_AKC) ? akc : cap; + + ret = chdir(s->dev_path); + if (ret == -1) { + perror("chdir"); + close(bin_fd); + return ret; + } + + /* Open the provision file */ + prov_fd = open(prov_file, O_WRONLY); + if (prov_fd == -1) { + fprintf(stderr, "Could not open file %s: %s\n", prov_file, strerror(errno)); + close(bin_fd); + return prov_fd; + } + + /* Read the binary file into the buffer */ + size = read(bin_fd, buf, 4096); + if (size == -1) { + close(bin_fd); + close(prov_fd); + return -1; + } + + ret = write(prov_fd, buf, size); + if (ret == -1) { + close(bin_fd); + close(prov_fd); + perror("Provisioning failed"); + return ret; + } + + printf("Provisioned %s file %s successfully\n", prov_file, bin_file); + + close(bin_fd); + close(prov_fd); + + return 0; +} + +static int sdsi_provision_akc(struct sdsi_dev *s, char *bin_file) +{ + int ret; + + ret = sdsi_update_registers(s); + if (ret) + return ret; + + if (!s->regs.en_features.sdsi) { + fprintf(stderr, "SDSi feature is present but not enabled. Unable to provision"); + return -1; + } + + if (!s->regs.prov_avail.available) { + fprintf(stderr, "Maximum number of updates (%d) has been reached.\n", + s->regs.prov_avail.threshold); + return -1; + } + + if (s->regs.auth_fail_count.key_failure_count == + s->regs.auth_fail_count.key_failure_threshold) { + fprintf(stderr, "Maximum number of AKC provision failures (%d) has been reached.\n", + s->regs.auth_fail_count.key_failure_threshold); + fprintf(stderr, "Power cycle the system to reset the counter\n"); + return -1; + } + + return sdsi_provision(s, bin_file, CMD_PROV_AKC); +} + +static int sdsi_provision_cap(struct sdsi_dev *s, char *bin_file) +{ + int ret; + + ret = sdsi_update_registers(s); + if (ret) + return ret; + + if (!s->regs.en_features.sdsi) { + fprintf(stderr, "SDSi feature is present but not enabled. Unable to provision"); + return -1; + } + + if (!s->regs.prov_avail.available) { + fprintf(stderr, "Maximum number of updates (%d) has been reached.\n", + s->regs.prov_avail.threshold); + return -1; + } + + if (s->regs.auth_fail_count.auth_failure_count == + s->regs.auth_fail_count.auth_failure_threshold) { + fprintf(stderr, "Maximum number of CAP provision failures (%d) has been reached.\n", + s->regs.auth_fail_count.auth_failure_threshold); + fprintf(stderr, "Power cycle the system to reset the counter\n"); + return -1; + } + + return sdsi_provision(s, bin_file, CMD_PROV_CAP); +} + +static int read_sysfs_data(const char *file, int *value) +{ + char buff[16]; + FILE *fp; + + fp = fopen(file, "r"); + if (!fp) { + perror(file); + return -1; + } + + if (!fgets(buff, 16, fp)) { + fprintf(stderr, "Failed to read file '%s'", file); + fclose(fp); + return -1; + } + + fclose(fp); + *value = strtol(buff, NULL, 0); + + return 0; +} + +static struct sdsi_dev *sdsi_create_dev(char *dev_no) +{ + int dev_name_len = sizeof(SDSI_DEV) + strlen(dev_no) + 1; + struct sdsi_dev *s; + int guid; + DIR *dir; + + s = (struct sdsi_dev *)malloc(sizeof(*s)); + if (!s) { + perror("malloc"); + return NULL; + } + + s->dev_name = (char *)malloc(sizeof(SDSI_DEV) + strlen(dev_no) + 1); + if (!s->dev_name) { + perror("malloc"); + free(s); + return NULL; + } + + snprintf(s->dev_name, dev_name_len, "%s.%s", SDSI_DEV, dev_no); + + s->dev_path = (char *)malloc(sizeof(AUX_DEV_PATH) + dev_name_len); + if (!s->dev_path) { + perror("malloc"); + free(s->dev_name); + free(s); + return NULL; + } + + snprintf(s->dev_path, sizeof(AUX_DEV_PATH) + dev_name_len, "%s%s", AUX_DEV_PATH, + s->dev_name); + dir = opendir(s->dev_path); + if (!dir) { + fprintf(stderr, "Could not open directory '%s': %s\n", s->dev_path, + strerror(errno)); + free(s->dev_path); + free(s->dev_name); + free(s); + return NULL; + } + + if (chdir(s->dev_path) == -1) { + perror("chdir"); + free(s->dev_path); + free(s->dev_name); + free(s); + return NULL; + } + + if (read_sysfs_data("guid", &guid)) { + free(s->dev_path); + free(s->dev_name); + free(s); + return NULL; + } + + s->guid = guid; + + return s; +} + +static void sdsi_free_dev(struct sdsi_dev *s) +{ + free(s->dev_path); + free(s->dev_name); + free(s); +} + +static void print_help(char *prog) +{ + printf("Usage: %s [-l] [-d dev_no [-is] [-a file] [-c file]]\n", prog); + + printf("\n"); + printf("Commands:\n"); + printf(" %-13s\t%s\n", "-l", "list available sdsi devices"); + printf(" %-13s\t%s\n", "-d ", "sdsi device number"); + printf(" %-13s\t%s\n", "-i", "show socket information"); + printf(" %-13s\t%s\n", "-s", "dump state certificate data"); + printf(" %-13s\t%s\n", "-a ", "provision socket with AKC file"); + printf(" %-13s\t%s\n", "-c ", "provision socket with CAP file"); +} + +int main(int argc, char *argv[]) +{ + char bin_file[PATH_MAX], *dev_no = NULL; + enum command command = CMD_NONE; + struct sdsi_dev *s; + int ret = 0, opt; + + while ((opt = getopt(argc, argv, "d:lisa:c:h")) != -1) { + switch (opt) { + case 'd': + dev_no = optarg; + break; + case 'l': + command = CMD_LIST_DEVICES; + break; + case 'i': + command = CMD_SOCKET_INFO; + break; + case 's': + command = CMD_DUMP_CERT; + break; + case 'a': + case 'c': + if (!access(optarg, F_OK) == 0) { + fprintf(stderr, "Could not open file '%s': %s\n", optarg, + strerror(errno)); + return -1; + } + + if (!realpath(optarg, bin_file)) { + perror("realpath"); + return -1; + } + + command = (opt == 'a') ? CMD_PROV_AKC : CMD_PROV_CAP; + break; + case 'h': + default: + print_help(argv[0]); + return 0; + } + } + + if (!dev_no && command != CMD_LIST_DEVICES) { + print_help(argv[0]); + return -1; + } + + if (dev_no) { + s = sdsi_create_dev(dev_no); + if (!s) + return -1; + } + + /* Run the command */ + switch (command) { + case CMD_NONE: + fprintf(stderr, "need to specify a command\n"); + print_help(argv[0]); + ret = -1; + case CMD_LIST_DEVICES: + sdsi_list_devices(); + break; + case CMD_SOCKET_INFO: + ret = sdsi_read_reg(s); + break; + case CMD_DUMP_CERT: + ret = sdsi_certificate_dump(s); + break; + case CMD_PROV_AKC: + ret = sdsi_provision_akc(s, bin_file); + break; + case CMD_PROV_CAP: + ret = sdsi_provision_cap(s, bin_file); + break; + } + + + if (dev_no) + sdsi_free_dev(s); + + return ret; +}