+
FPU EMULATOR
M: Bill Metzenthen <bi...@melbpc.org.au>
S: Maintained
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 88f64fbf55e3..97c0a6cc2ba7 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -235,4 +235,13 @@ config FPGA_MGR_ZYNQMP_FPGA
to configure the programmable logic(PL) through PS
on ZynqMP SoC.
+config IFPGA_SEC_MGR
+ tristate "Intel Security Manager for FPGA"
+ help
+ The Intel Security Manager class driver presents a common
+ user API for managing secure updates for Intel FPGA
+ devices, including flash images for the FPGA static
+ region and for the BMC. Select this option to enable
+ updates for secure FPGA devices.
+
endif # FPGA
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index c69bfc931519..ec9fbacdedd8 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -21,6 +21,9 @@ obj-$(CONFIG_FPGA_MGR_ZYNQMP_FPGA) += zynqmp-fpga.o
obj-$(CONFIG_ALTERA_PR_IP_CORE) += altera-pr-ip-core.o
obj-$(CONFIG_ALTERA_PR_IP_CORE_PLAT) += altera-pr-ip-core-plat.o
+# Intel FPGA Security Manager Framework
+obj-$(CONFIG_IFPGA_SEC_MGR) += ifpga-sec-mgr.o
+
# FPGA Bridge Drivers
obj-$(CONFIG_FPGA_BRIDGE) += fpga-bridge.o
obj-$(CONFIG_SOCFPGA_FPGA_BRIDGE) += altera-hps2fpga.o altera-fpga2sdram.o
diff --git a/drivers/fpga/ifpga-sec-mgr.c b/drivers/fpga/ifpga-sec-mgr.c
new file mode 100644
index 000000000000..97bf80277ed2
--- /dev/null
+++ b/drivers/fpga/ifpga-sec-mgr.c
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel Security Manager for FPGA
+ *
+ * Copyright (C) 2019-2020 Intel Corporation, Inc.
+ */
+
+#include <linux/fpga/ifpga-sec-mgr.h>
+#include <linux/idr.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+static DEFINE_IDA(ifpga_sec_mgr_ida);
+static struct class *ifpga_sec_mgr_class;
+
+static ssize_t show_canceled_csk(struct ifpga_sec_mgr *imgr,
+ sysfs_csk_hndlr_t get_csk,
+ sysfs_csk_nbits_t get_csk_nbits,
+ char *buf)
+{
+ unsigned long *csk_map = NULL;
+ unsigned int nbits;
+ int cnt, ret;
+
+ ret = get_csk_nbits(imgr);
+ if (ret < 0)
+ return ret;
+
+ nbits = (unsigned int)ret;
+ csk_map = vmalloc(sizeof(unsigned long) * BITS_TO_LONGS(nbits));
+ if (!csk_map)
+ return -ENOMEM;
+
+ ret = get_csk(imgr, csk_map, nbits);
+ if (ret)
+ goto vfree_exit;
+
+ cnt = bitmap_print_to_pagebuf(1, buf, csk_map, nbits);
+
+vfree_exit:
+ vfree(csk_map);
+ return ret ? : cnt;
+}
+
+static ssize_t show_root_entry_hash(struct ifpga_sec_mgr *imgr,
+ sysfs_reh_hndlr_t get_reh,
+ sysfs_reh_size_t get_reh_size,
+ char *buf)
+{
+ unsigned int size, i;
+ int ret, cnt = 0;
+ u8 *hash;
+
+ ret = get_reh_size(imgr);
+ if (ret < 0)
+ return ret;
+ else if (!ret)
+ return sprintf(buf, "hash not programmed\n");
+
+ size = (unsigned int)ret;
+ hash = vmalloc(size);
+ if (!hash)
+ return -ENOMEM;
+
+ ret = get_reh(imgr, hash, size);
+ if (ret)
+ goto vfree_exit;
+
+ cnt += sprintf(buf, "0x");
+ for (i = 0; i < size; i++)
+ cnt += sprintf(buf + cnt, "%02x", hash[i]);
+ cnt += sprintf(buf + cnt, "\n");
+
+vfree_exit:
+ vfree(hash);
+ return ret ? : cnt;
+}
+
+#define to_sec_mgr(d) container_of(d, struct ifpga_sec_mgr, dev)
+
+#define DEVICE_ATTR_SEC_CSK(_name) \
+static ssize_t _name##_canceled_csks_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct ifpga_sec_mgr *imgr = to_sec_mgr(dev); \
+ return show_canceled_csk(imgr, \
+ imgr->iops->_name##_canceled_csks, \
+ imgr->iops->_name##_canceled_csk_nbits, buf); \
+} \
+static DEVICE_ATTR_RO(_name##_canceled_csks)
+
+#define DEVICE_ATTR_SEC_ROOT_ENTRY_HASH(_name) \
+static ssize_t _name##_root_entry_hash_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct ifpga_sec_mgr *imgr = to_sec_mgr(dev); \
+ return show_root_entry_hash(imgr, \
+ imgr->iops->_name##_root_entry_hash, \
+ imgr->iops->_name##_reh_size, buf); \
+} \
+static DEVICE_ATTR_RO(_name##_root_entry_hash)
+
+#define DEVICE_ATTR_SEC_FLASH_CNT(_name) \
+static ssize_t _name##_flash_count_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct ifpga_sec_mgr *imgr = to_sec_mgr(dev); \
+ int cnt = imgr->iops->_name##_flash_count(imgr); \
+ return cnt < 0 ? cnt : sprintf(buf, "%d\n", cnt); \
+} \
+static DEVICE_ATTR_RO(_name##_flash_count)
+
+DEVICE_ATTR_SEC_ROOT_ENTRY_HASH(sr);
+DEVICE_ATTR_SEC_ROOT_ENTRY_HASH(pr);
+DEVICE_ATTR_SEC_ROOT_ENTRY_HASH(bmc);
+DEVICE_ATTR_SEC_FLASH_CNT(user);
+DEVICE_ATTR_SEC_FLASH_CNT(bmc);
+DEVICE_ATTR_SEC_CSK(sr);
+DEVICE_ATTR_SEC_CSK(pr);
+DEVICE_ATTR_SEC_CSK(bmc);
+
+static struct attribute *sec_mgr_security_attrs[] = {
+ &dev_attr_user_flash_count.attr,
+ &dev_attr_bmc_flash_count.attr,
+ &dev_attr_bmc_root_entry_hash.attr,
+ &dev_attr_sr_root_entry_hash.attr,
+ &dev_attr_pr_root_entry_hash.attr,
+ &dev_attr_sr_canceled_csks.attr,
+ &dev_attr_pr_canceled_csks.attr,
+ &dev_attr_bmc_canceled_csks.attr,
+ NULL,
+};
+
+#define check_attr(attribute, _name) \
+ ((attribute) == &dev_attr_##_name.attr && imgr->iops->_name)
+
+static umode_t sec_mgr_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct ifpga_sec_mgr *imgr = to_sec_mgr(kobj_to_dev(kobj));
+
+ if (check_attr(attr, user_flash_count) ||
+ check_attr(attr, bmc_flash_count) ||
+ check_attr(attr, bmc_root_entry_hash) ||
+ check_attr(attr, sr_root_entry_hash) ||
+ check_attr(attr, pr_root_entry_hash) ||
+ check_attr(attr, sr_canceled_csks) ||
+ check_attr(attr, pr_canceled_csks) ||
+ check_attr(attr, bmc_canceled_csks))
+ return attr->mode;
+
+ return 0;
+}
+
+static struct attribute_group sec_mgr_security_attr_group = {
+ .name = "security",
+ .attrs = sec_mgr_security_attrs,
+ .is_visible = sec_mgr_visible,
+};
+
+static ssize_t name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ifpga_sec_mgr *imgr = to_sec_mgr(dev);
+
+ return sprintf(buf, "%s\n", imgr->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static struct attribute *sec_mgr_attrs[] = {
+ &dev_attr_name.attr,
+ NULL,
+};
+
+static struct attribute_group sec_mgr_attr_group = {
+ .attrs = sec_mgr_attrs,
+};
+
+static const struct attribute_group *ifpga_sec_mgr_attr_groups[] = {
+ &sec_mgr_attr_group,
+ &sec_mgr_security_attr_group,
+ NULL,
+};
+
+static bool check_sysfs_handler(struct device *dev,
+ void *sysfs_handler, void *size_handler,
+ const char *sysfs_handler_name,
+ const char *size_handler_name)
+{
+ if (sysfs_handler) {
+ if (!size_handler) {
+ dev_err(dev, "%s registered without %s\n",
+ sysfs_handler_name, size_handler_name);
+ return false;
+ }
+ } else if (size_handler) {
+ dev_err(dev, "%s registered without %s\n",
+ size_handler_name, sysfs_handler_name);
+ return false;
+ }
+ return true;
+}
+
+#define check_reh_handler(_dev, _iops, _name) \
+ check_sysfs_handler(_dev, (_iops)->_name##_root_entry_hash, \
+ (_iops)->_name##_reh_size, \
+ __stringify(_name##_root_entry_hash), \
+ __stringify(_name##_reh_size))
+
+#define check_csk_handler(_dev, _iops, _name) \
+ check_sysfs_handler(_dev, (_iops)->_name##_canceled_csks, \
+ (_iops)->_name##_canceled_csk_nbits, \
+ __stringify(_name##_canceled_csks), \
+ __stringify(_name##_canceled_csk_nbits))
+
+/**
+ * ifpga_sec_mgr_register - register an IFPGA security manager struct
+ *
+ * @dev: create ifpga security manager device from pdev
+ * @name: ifpga security manager name
+ * @iops: pointer to a structure of ifpga callback functions
+ * @priv: ifpga security manager private data
+ *
+ * Returns &struct ifpga_sec_mgr pointer on success, or ERR_PTR() on error.
+ */
+struct ifpga_sec_mgr *
+ifpga_sec_mgr_register(struct device *dev, const char *name,
+ const struct ifpga_sec_mgr_ops *iops, void *priv)
+{
+ struct ifpga_sec_mgr *imgr;
+ int id, ret;
+
+ if (!check_reh_handler(dev, iops, bmc) ||
+ !check_reh_handler(dev, iops, sr) ||
+ !check_reh_handler(dev, iops, pr) ||
+ !check_csk_handler(dev, iops, bmc) ||
+ !check_csk_handler(dev, iops, sr) ||
+ !check_csk_handler(dev, iops, pr)) {
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (!name || !strlen(name)) {
+ dev_err(dev, "Attempt to register with no name!\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ imgr = kzalloc(sizeof(*imgr), GFP_KERNEL);
+ if (!imgr)
+ return ERR_PTR(-ENOMEM);
+
+ imgr->name = name;
+ imgr->priv = priv;
+ imgr->iops = iops;
+ mutex_init(&imgr->lock);
+
+ id = ida_simple_get(&ifpga_sec_mgr_ida, 0, 0, GFP_KERNEL);
+ if (id < 0) {
+ ret = id;
+ goto exit_free;
+ }
+
+ imgr->dev.class = ifpga_sec_mgr_class;
+ imgr->dev.parent = dev;
+ imgr->dev.id = id;
+
+ ret = dev_set_name(&imgr->dev, "ifpga_sec%d", id);
+ if (ret) {
+ dev_err(dev, "Failed to set device name: ifpga_sec%d\n", id);
+ ida_simple_remove(&ifpga_sec_mgr_ida, id);
+ goto exit_free;
+ }
+
+ ret = device_register(&imgr->dev);
+ if (ret) {
+ put_device(&imgr->dev);
+ return ERR_PTR(ret);
+ }
+
+ return imgr;
+
+exit_free:
+ kfree(dev);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(ifpga_sec_mgr_register);
+
+/**
+ * ifpga_sec_mgr_unregister - unregister a IFPGA security manager
+ *
+ * @mgr: fpga manager struct
+ *
+ * This function is intended for use in a IFPGA security manager
+ * driver's remove() function.
+ */
+void ifpga_sec_mgr_unregister(struct ifpga_sec_mgr *imgr)
+{
+ dev_info(&imgr->dev, "%s %s\n", __func__, imgr->name);
+
+ device_unregister(&imgr->dev);
+}
+EXPORT_SYMBOL_GPL(ifpga_sec_mgr_unregister);
+
+static void ifpga_sec_mgr_dev_release(struct device *dev)
+{
+ struct ifpga_sec_mgr *imgr = to_sec_mgr(dev);
+
+ mutex_destroy(&imgr->lock);
+ ida_simple_remove(&ifpga_sec_mgr_ida, imgr->dev.id);
+ kfree(imgr);
+}
+
+static int __init ifpga_sec_mgr_class_init(void)
+{
+ pr_info("Intel FPGA Security Manager\n");
+
+ ifpga_sec_mgr_class = class_create(THIS_MODULE, "ifpga_sec_mgr");
+ if (IS_ERR(ifpga_sec_mgr_class))
+ return PTR_ERR(ifpga_sec_mgr_class);
+
+ ifpga_sec_mgr_class->dev_groups = ifpga_sec_mgr_attr_groups;
+ ifpga_sec_mgr_class->dev_release = ifpga_sec_mgr_dev_release;
+
+ return 0;
+}
+
+static void __exit ifpga_sec_mgr_class_exit(void)
+{
+ class_destroy(ifpga_sec_mgr_class);
+ ida_destroy(&ifpga_sec_mgr_ida);
+}
+
+MODULE_DESCRIPTION("Intel FPGA Security Manager Driver");
+MODULE_LICENSE("GPL v2");
+
+subsys_initcall(ifpga_sec_mgr_class_init);
+module_exit(ifpga_sec_mgr_class_exit)
diff --git a/include/linux/fpga/ifpga-sec-mgr.h
b/include/linux/fpga/ifpga-sec-mgr.h
new file mode 100644
index 000000000000..e391b0c8f448
--- /dev/null
+++ b/include/linux/fpga/ifpga-sec-mgr.h
@@ -0,0 +1,145 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Header file for Intel FPGA Security Manager
+ *
+ * Copyright (C) 2019-2020 Intel Corporation, Inc.
+ */
+#ifndef _LINUX_IFPGA_SEC_MGR_H
+#define _LINUX_IFPGA_SEC_MGR_H
+
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+
+struct ifpga_sec_mgr;
+
+/**
+ * typedef sysfs_reh_size_t - Function to return byte size of root entry hash
+ *
+ * @imgr: pointer to security manager structure
+ *
+ * This datatype is used to define a function that returns the byte size of a
+ * root entry hash.
+ *
+ * Context: No locking requirements are imposed by the security manager.
+ * Return: Byte count on success, negative errno on failure
+ */
+typedef int (*sysfs_reh_size_t)(struct ifpga_sec_mgr *imgr);
+
+/**
+ * typedef sysfs_reh_hndlr_t - Function pointer to sysfs file handler
+ * for root entry hashes
+ * @imgr: pointer to security manager structure
+ * @hash: pointer to an array of bytes in which to store the hash
+ * @size: byte size of root entry hash
+ *
+ * This datatype is used to define a sysfs file handler function to
+ * return root entry hash data to be displayed via sysfs.
+ *
+ * Context: No locking requirements are imposed by the security manager.
+ * Return: 0 on success, negative errno on failure
+ */
+typedef int (*sysfs_reh_hndlr_t)(struct ifpga_sec_mgr *imgr, u8 *hash,
+ unsigned int size);
+
+/**
+ * typedef sysfs_cnt_hndlr_t - Function pointer to sysfs file handler
+ * for flash counts
+ * @imgr: pointer to security manager structure
+ *
+ * This datatype is used to define a sysfs file handler function to
+ * return a flash count to be displayed via sysfs.
+ *
+ * Context: No locking requirements are imposed by the security manager
+ * Return: flash count or negative errno
+ */
+typedef int (*sysfs_cnt_hndlr_t)(struct ifpga_sec_mgr *imgr);
+
+/**
+ * typedef sysfs_csk_nbits_t - Function to return the number of bits in
+ * a Code Signing Key cancellation vector
+ *
+ * @imgr: pointer to security manager structure
+ *
+ * This datatype is used to define a function that returns the number of bits
+ * in a Code Signing Key cancellation vector.
+ *
+ * Context: No locking requirements are imposed by the security manager.
+ * Return: Number of bits on success, negative errno on failure
+ */
+typedef int (*sysfs_csk_nbits_t)(struct ifpga_sec_mgr *imgr);
+
+/**
+ * typedef sysfs_csk_hndlr_t - Function pointer to sysfs file handler
+ * bit vector of canceled keys
+ *
+ * @imgr: pointer to security manager structure
+ * @csk_map: pointer to a bitmap to contain cancellation key vector
+ * @nbits: number of bits in CSK vector
+ *
+ * This datatype is used to define a sysfs file handler function to
+ * return a bitmap of canceled keys to be displayed via sysfs.
+ *
+ * Context: No locking requirements are imposed by the security manager.
+ * Return: 0 on success, negative errno on failure
+ */
+typedef int (*sysfs_csk_hndlr_t)(struct ifpga_sec_mgr *imgr,
+ unsigned long *csk_map, unsigned int nbits);
+
+/**
+ * struct ifpga_sec_mgr_ops - device specific operations
+ * @user_flash_count: Optional: Return sysfs string output for FPGA
+ * image flash count
+ * @bmc_flash_count: Optional: Return sysfs string output for BMC
+ * image flash count
+ * @sr_root_entry_hash: Optional: Return sysfs string output for
static
+ * region root entry hash
+ * @pr_root_entry_hash: Optional: Return sysfs string output for
partial
+ * reconfiguration root entry hash
+ * @bmc_root_entry_hash: Optional: Return sysfs string output for BMC
+ * root entry hash
+ * @sr_canceled_csks: Optional: Return sysfs string output for static
+ * region canceled keys
+ * @pr_canceled_csks: Optional: Return sysfs string output for partial
+ * reconfiguration canceled keys
+ * @bmc_canceled_csks: Optional: Return sysfs string output for bmc
+ * canceled keys
+ * @bmc_canceled_csk_nbits: Optional: Return BMC canceled csk vector bit count
+ * @sr_canceled_csk_nbits: Optional: Return SR canceled csk vector bit count
+ * @pr_canceled_csk_nbits: Optional: Return PR canceled csk vector bit count
+ * @bmc_reh_size: Optional: Return byte size for BMC root entry hash
+ * @sr_reh_size: Optional: Return byte size for SR root entry hash
+ * @pr_reh_size: Optional: Return byte size for PR root entry hash
+ */
+struct ifpga_sec_mgr_ops {
+ sysfs_cnt_hndlr_t user_flash_count;
+ sysfs_cnt_hndlr_t bmc_flash_count;
+ sysfs_cnt_hndlr_t smbus_flash_count;
+ sysfs_reh_hndlr_t sr_root_entry_hash;
+ sysfs_reh_hndlr_t pr_root_entry_hash;
+ sysfs_reh_hndlr_t bmc_root_entry_hash;
+ sysfs_csk_hndlr_t sr_canceled_csks;
+ sysfs_csk_hndlr_t pr_canceled_csks;
+ sysfs_csk_hndlr_t bmc_canceled_csks;
+ sysfs_reh_size_t bmc_reh_size;
+ sysfs_reh_size_t sr_reh_size;
+ sysfs_reh_size_t pr_reh_size;
+ sysfs_csk_nbits_t bmc_canceled_csk_nbits;
+ sysfs_csk_nbits_t sr_canceled_csk_nbits;
+ sysfs_csk_nbits_t pr_canceled_csk_nbits;
+};
+
+struct ifpga_sec_mgr {
+ const char *name;
+ struct device dev;
+ const struct ifpga_sec_mgr_ops *iops;
+ struct mutex lock; /* protect data structure contents */
+ void *priv;
+};
+
+struct ifpga_sec_mgr *
+ifpga_sec_mgr_register(struct device *dev, const char *name,
+ const struct ifpga_sec_mgr_ops *iops, void *priv);
+void ifpga_sec_mgr_unregister(struct ifpga_sec_mgr *imgr);
+
+#endif
--
2.17.1
