diff options
24 files changed, 872 insertions, 62 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 37babf91f2cb..86a31dfc036e 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1062,6 +1062,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. dscc4.setup= [NET] + dump_apple_properties [X86] + Dump name and content of EFI device properties on + x86 Macs. Useful for driver authors to determine + what data is available or for reverse-engineering. + dyndbg[="val"] [KNL,DYNAMIC_DEBUG] module.dyndbg[="val"] Enable debug messages at boot time. See diff --git a/MAINTAINERS b/MAINTAINERS index e2463baf33e5..cfbb164acd20 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4645,12 +4645,14 @@ L: linux-efi@vger.kernel.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git S: Maintained F: Documentation/efi-stub.txt -F: arch/ia64/kernel/efi.c +F: arch/*/kernel/efi.c F: arch/x86/boot/compressed/eboot.[ch] -F: arch/x86/include/asm/efi.h +F: arch/*/include/asm/efi.h F: arch/x86/platform/efi/ F: drivers/firmware/efi/ F: include/linux/efi*.h +F: arch/arm/boot/compressed/efi-header.S +F: arch/arm64/kernel/efi-entry.S EFI VARIABLE FILESYSTEM M: Matthew Garrett <matthew.garrett@nebula.com> diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h index 766bf9b78160..0b06f5341b45 100644 --- a/arch/arm/include/asm/efi.h +++ b/arch/arm/include/asm/efi.h @@ -57,6 +57,9 @@ void efi_virtmap_unload(void); #define __efi_call_early(f, ...) f(__VA_ARGS__) #define efi_is_64bit() (false) +#define efi_call_proto(protocol, f, instance, ...) \ + ((protocol##_t *)instance)->f(instance, ##__VA_ARGS__) + struct screen_info *alloc_screen_info(efi_system_table_t *sys_table_arg); void free_screen_info(efi_system_table_t *sys_table, struct screen_info *si); diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index a9e54aad15ef..771b3f0bc757 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -51,6 +51,9 @@ int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md); #define __efi_call_early(f, ...) f(__VA_ARGS__) #define efi_is_64bit() (true) +#define efi_call_proto(protocol, f, instance, ...) \ + ((protocol##_t *)instance)->f(instance, ##__VA_ARGS__) + #define alloc_screen_info(x...) &screen_info #define free_screen_info(x...) diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c index cc69e37548db..ff01c8fc76f7 100644 --- a/arch/x86/boot/compressed/eboot.c +++ b/arch/x86/boot/compressed/eboot.c @@ -537,6 +537,69 @@ free_handle: efi_call_early(free_pool, pci_handle); } +static void retrieve_apple_device_properties(struct boot_params *boot_params) +{ + efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID; + struct setup_data *data, *new; + efi_status_t status; + u32 size = 0; + void *p; + + status = efi_call_early(locate_protocol, &guid, NULL, &p); + if (status != EFI_SUCCESS) + return; + + if (efi_table_attr(apple_properties_protocol, version, p) != 0x10000) { + efi_printk(sys_table, "Unsupported properties proto version\n"); + return; + } + + efi_call_proto(apple_properties_protocol, get_all, p, NULL, &size); + if (!size) + return; + + do { + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, + size + sizeof(struct setup_data), &new); + if (status != EFI_SUCCESS) { + efi_printk(sys_table, + "Failed to alloc mem for properties\n"); + return; + } + + status = efi_call_proto(apple_properties_protocol, get_all, p, + new->data, &size); + + if (status == EFI_BUFFER_TOO_SMALL) + efi_call_early(free_pool, new); + } while (status == EFI_BUFFER_TOO_SMALL); + + new->type = SETUP_APPLE_PROPERTIES; + new->len = size; + new->next = 0; + + data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data; + if (!data) + boot_params->hdr.setup_data = (unsigned long)new; + else { + while (data->next) + data = (struct setup_data *)(unsigned long)data->next; + data->next = (unsigned long)new; + } +} + +static void setup_quirks(struct boot_params *boot_params) +{ + efi_char16_t const apple[] = { 'A', 'p', 'p', 'l', 'e', 0 }; + efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long) + efi_table_attr(efi_system_table, fw_vendor, sys_table); + + if (!memcmp(fw_vendor, apple, sizeof(apple))) { + if (IS_ENABLED(CONFIG_APPLE_PROPERTIES)) + retrieve_apple_device_properties(boot_params); + } +} + static efi_status_t setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height) { @@ -1098,6 +1161,8 @@ struct boot_params *efi_main(struct efi_config *c, setup_efi_pci(boot_params); + setup_quirks(boot_params); + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, sizeof(*gdt), (void **)&gdt); if (status != EFI_SUCCESS) { diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h index 389d700b961e..e99675b9c861 100644 --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -210,12 +210,18 @@ static inline bool efi_is_64bit(void) return __efi_early()->is64; } +#define efi_table_attr(table, attr, instance) \ + (efi_is_64bit() ? \ + ((table##_64_t *)(unsigned long)instance)->attr : \ + ((table##_32_t *)(unsigned long)instance)->attr) + +#define efi_call_proto(protocol, f, instance, ...) \ + __efi_early()->call(efi_table_attr(protocol, f, instance), \ + instance, ##__VA_ARGS__) + #define efi_call_early(f, ...) \ - __efi_early()->call(efi_is_64bit() ? \ - ((efi_boot_services_64_t *)(unsigned long) \ - __efi_early()->boot_services)->f : \ - ((efi_boot_services_32_t *)(unsigned long) \ - __efi_early()->boot_services)->f, __VA_ARGS__) + __efi_early()->call(efi_table_attr(efi_boot_services, f, \ + __efi_early()->boot_services), __VA_ARGS__) #define __efi_call_early(f, ...) \ __efi_early()->call((unsigned long)f, __VA_ARGS__); diff --git a/arch/x86/include/uapi/asm/bootparam.h b/arch/x86/include/uapi/asm/bootparam.h index c18ce67495fa..b10bf319ed20 100644 --- a/arch/x86/include/uapi/asm/bootparam.h +++ b/arch/x86/include/uapi/asm/bootparam.h @@ -7,6 +7,7 @@ #define SETUP_DTB 2 #define SETUP_PCI 3 #define SETUP_EFI 4 +#define SETUP_APPLE_PROPERTIES 5 /* ram_size flags */ #define RAMDISK_IMAGE_START_MASK 0x07FF diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig index c981be17d3c0..2e78b0b96d74 100644 --- a/drivers/firmware/efi/Kconfig +++ b/drivers/firmware/efi/Kconfig @@ -129,7 +129,25 @@ config EFI_TEST Say Y here to enable the runtime services support via /dev/efi_test. If unsure, say N. +config APPLE_PROPERTIES + bool "Apple Device Properties" + depends on EFI_STUB && X86 + select EFI_DEV_PATH_PARSER + select UCS2_STRING + help + Retrieve properties from EFI on Apple Macs and assign them to + devices, allowing for improved support of Apple hardware. + Properties that would otherwise be missing include the + Thunderbolt Device ROM and GPU configuration data. + + If unsure, say Y if you have a Mac. Otherwise N. + endmenu config UEFI_CPER bool + +config EFI_DEV_PATH_PARSER + bool + depends on ACPI + default n diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile index c8a439f6d715..ad67342313ed 100644 --- a/drivers/firmware/efi/Makefile +++ b/drivers/firmware/efi/Makefile @@ -21,6 +21,8 @@ obj-$(CONFIG_EFI_STUB) += libstub/ obj-$(CONFIG_EFI_FAKE_MEMMAP) += fake_mem.o obj-$(CONFIG_EFI_BOOTLOADER_CONTROL) += efibc.o obj-$(CONFIG_EFI_TEST) += test/ +obj-$(CONFIG_EFI_DEV_PATH_PARSER) += dev-path-parser.o +obj-$(CONFIG_APPLE_PROPERTIES) += apple-properties.o arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o obj-$(CONFIG_ARM) += $(arm-obj-y) diff --git a/drivers/firmware/efi/apple-properties.c b/drivers/firmware/efi/apple-properties.c new file mode 100644 index 000000000000..c473f4c5ca34 --- /dev/null +++ b/drivers/firmware/efi/apple-properties.c @@ -0,0 +1,248 @@ +/* + * apple-properties.c - EFI device properties on Macs + * Copyright (C) 2016 Lukas Wunner <lukas@wunner.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#define pr_fmt(fmt) "apple-properties: " fmt + +#include <linux/bootmem.h> +#include <linux/dmi.h> +#include <linux/efi.h> +#include <linux/property.h> +#include <linux/slab.h> +#include <linux/ucs2_string.h> +#include <asm/setup.h> + +static bool dump_properties __initdata; + +static int __init dump_properties_enable(char *arg) +{ + dump_properties = true; + return 0; +} + +__setup("dump_apple_properties", dump_properties_enable); + +struct dev_header { + u32 len; + u32 prop_count; + struct efi_dev_path path[0]; + /* + * followed by key/value pairs, each key and value preceded by u32 len, + * len includes itself, value may be empty (in which case its len is 4) + */ +}; + +struct properties_header { + u32 len; + u32 version; + u32 dev_count; + struct dev_header dev_header[0]; +}; + +static u8 one __initdata = 1; + +static void __init unmarshal_key_value_pairs(struct dev_header *dev_header, + struct device *dev, void *ptr, + struct property_entry entry[]) +{ + int i; + + for (i = 0; i < dev_header->prop_count; i++) { + int remaining = dev_header->len - (ptr - (void *)dev_header); + u32 key_len, val_len; + char *key; + + if (sizeof(key_len) > remaining) + break; + + key_len = *(typeof(key_len) *)ptr; + if (key_len + sizeof(val_len) > remaining || + key_len < sizeof(key_len) + sizeof(efi_char16_t) || + *(efi_char16_t *)(ptr + sizeof(key_len)) == 0) { + dev_err(dev, "invalid property name len at %#zx\n", + ptr - (void *)dev_header); + break; + } + + val_len = *(typeof(val_len) *)(ptr + key_len); + if (key_len + val_len > remaining || + val_len < sizeof(val_len)) { + dev_err(dev, "invalid property val len at %#zx\n", + ptr - (void *)dev_header + key_len); + break; + } + + /* 4 bytes to accommodate UTF-8 code points + null byte */ + key = kzalloc((key_len - sizeof(key_len)) * 4 + 1, GFP_KERNEL); + if (!key) { + dev_err(dev, "cannot allocate property name\n"); + break; + } + ucs2_as_utf8(key, ptr + sizeof(key_len), + key_len - sizeof(key_len)); + + entry[i].name = key; + entry[i].is_array = true; + entry[i].length = val_len - sizeof(val_len); + entry[i].pointer.raw_data = ptr + key_len + sizeof(val_len); + if (!entry[i].length) { + /* driver core doesn't accept empty properties */ + entry[i].length = 1; + entry[i].pointer.raw_data = &one; + } + + if (dump_properties) { + dev_info(dev, "property: %s\n", entry[i].name); + print_hex_dump(KERN_INFO, pr_fmt(), DUMP_PREFIX_OFFSET, + 16, 1, entry[i].pointer.raw_data, + entry[i].length, true); + } + + ptr += key_len + val_len; + } + + if (i != dev_header->prop_count) { + dev_err(dev, "got %d device properties, expected %u\n", i, + dev_header->prop_count); + print_hex_dump(KERN_ERR, pr_fmt(), DUMP_PREFIX_OFFSET, + 16, 1, dev_header, dev_header->len, true); + return; + } + + dev_info(dev, "assigning %d device properties\n", i); +} + +static int __init unmarshal_devices(struct properties_header *properties) +{ + size_t offset = offsetof(struct properties_header, dev_header[0]); + + while (offset + sizeof(struct dev_header) < properties->len) { + struct dev_header *dev_header = (void *)properties + offset; + struct property_entry *entry = NULL; + struct device *dev; + size_t len; + int ret, i; + void *ptr; + + if (offset + dev_header->len > properties->len || + dev_header->len <= sizeof(*dev_header)) { + pr_err("invalid len in dev_header at %#zx\n", offset); + return -EINVAL; + } + + ptr = dev_header->path; + len = dev_header->len - sizeof(*dev_header); + + dev = efi_get_device_by_path((struct efi_dev_path **)&ptr, &len); + if (IS_ERR(dev)) { + pr_err("device path parse error %ld at %#zx:\n", + PTR_ERR(dev), ptr - (void *)dev_header); + print_hex_dump(KERN_ERR, pr_fmt(), DUMP_PREFIX_OFFSET, + 16, 1, dev_header, dev_header->len, true); + dev = NULL; + goto skip_device; + } + + entry = kcalloc(dev_header->prop_count + 1, sizeof(*entry), + GFP_KERNEL); + if (!entry) { + dev_err(dev, "cannot allocate properties\n"); + goto skip_device; + } + + unmarshal_key_value_pairs(dev_header, dev, ptr, entry); + if (!entry[0].name) + goto skip_device; + + ret = device_add_properties(dev, entry); /* makes deep copy */ + if (ret) + dev_err(dev, "error %d assigning properties\n", ret); + + for (i = 0; entry[i].name; i++) + kfree(entry[i].name); + +skip_device: + kfree(entry); + put_device(dev); + offset += dev_header->len; + } + + return 0; +} + +static int __init map_properties(void) +{ + struct properties_header *properties; + struct setup_data *data; + u32 data_len; + u64 pa_data; + int ret; + + if (!dmi_match(DMI_SYS_VENDOR, "Apple Inc.") && + !dmi_match(DMI_SYS_VENDOR, "Apple Computer, Inc.")) + return 0; + + pa_data = boot_params.hdr.setup_data; + while (pa_data) { + data = ioremap(pa_data, sizeof(*data)); + if (!data) { + pr_err("cannot map setup_data header\n"); + return -ENOMEM; + } + + if (data->type != SETUP_APPLE_PROPERTIES) { + pa_data = data->next; + iounmap(data); + continue; + } + + data_len = data->len; + iounmap(data); + + data = ioremap(pa_data, sizeof(*data) + data_len); + if (!data) { + pr_err("cannot map setup_data payload\n"); + return -ENOMEM; + } + + properties = (struct properties_header *)data->data; + if (properties->version != 1) { + pr_err("unsupported version:\n"); + print_hex_dump(KERN_ERR, pr_fmt(), DUMP_PREFIX_OFFSET, + 16, 1, properties, data_len, true); + ret = -ENOTSUPP; + } else if (properties->len != data_len) { + pr_err("length mismatch, expected %u\n", data_len); + print_hex_dump(KERN_ERR, pr_fmt(), DUMP_PREFIX_OFFSET, + 16, 1, properties, data_len, true); + ret = -EINVAL; + } else + ret = unmarshal_devices(properties); + + /* + * Can only free the setup_data payload but not its header + * to avoid breaking the chain of ->next pointers. + */ + data->len = 0; + iounmap(data); + free_bootmem_late(pa_data + sizeof(*data), data_len); + + return ret; + } + return 0; +} + +fs_initcall(map_properties); diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c index 8efe13075c92..f853ad2c4ca0 100644 --- a/drivers/firmware/efi/arm-init.c +++ b/drivers/firmware/efi/arm-init.c @@ -244,8 +244,10 @@ void __init efi_init(void) "Unexpected EFI_MEMORY_DESCRIPTOR version %ld", efi.memmap.desc_version); - if (uefi_init() < 0) + if (uefi_init() < 0) { + efi_memmap_unmap(); return; + } reserve_regions(); efi_memattr_init(); diff --git a/drivers/firmware/efi/dev-path-parser.c b/drivers/firmware/efi/dev-path-parser.c new file mode 100644 index 000000000000..85d1834ee9b7 --- /dev/null +++ b/drivers/firmware/efi/dev-path-parser.c @@ -0,0 +1,203 @@ +/* + * dev-path-parser.c - EFI Device Path parser + * Copyright (C) 2016 Lukas Wunner <lukas@wunner.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/acpi.h> +#include <linux/efi.h> +#include <linux/pci.h> + +struct acpi_hid_uid { + struct acpi_device_id hid[2]; + char uid[11]; /* UINT_MAX + null byte */ +}; + +static int __init match_acpi_dev(struct device *dev, void *data) +{ + struct acpi_hid_uid hid_uid = *(struct acpi_hid_uid *)data; + struct acpi_device *adev = to_acpi_device(dev); + + if (acpi_match_device_ids(adev, hid_uid.hid)) + return 0; + + if (adev->pnp.unique_id) + return !strcmp(adev->pnp.unique_id, hid_uid.uid); + else + return !strcmp("0", hid_uid.uid); +} + +static long __init parse_acpi_path(struct efi_dev_path *node, + struct device *parent, struct device **child) +{ + struct acpi_hid_uid hid_uid = {}; + struct device *phys_dev; + + if (node->length != 12) + return -EINVAL; + + sprintf(hid_uid.hid[0].id, "%c%c%c%04X", + 'A' + ((node->acpi.hid >> 10) & 0x1f) - 1, + 'A' + ((node->acpi.hid >> 5) & 0x1f) - 1, + 'A' + ((node->acpi.hid >> 0) & 0x1f) - 1, + node->acpi.hid >> 16); + sprintf(hid_uid.uid, "%u", node->acpi.uid); + + *child = bus_find_device(&acpi_bus_type, NULL, &hid_uid, + match_acpi_dev); + if (!*child) + return -ENODEV; + + phys_dev = acpi_get_first_physical_node(to_acpi_device(*child)); + if (phys_dev) { + get_device(phys_dev); + put_device(*child); + *child = phys_dev; + } + + return 0; +} + +static int __init match_pci_dev(struct device *dev, void *data) +{ + unsigned int devfn = *(unsigned int *)data; + + return dev_is_pci(dev) && to_pci_dev(dev)->devfn == devfn; +} + +static long __init parse_pci_path(struct efi_dev_path *node, + struct device *parent, struct device **child) +{ + unsigned int devfn; + + if (node->length != 6) + return -EINVAL; + if (!parent) + return -EINVAL; + + devfn = PCI_DEVFN(node->pci.dev, node->pci.fn); + + *child = device_find_child(parent, &devfn, match_pci_dev); + if (!*child) + return -ENODEV; + + return 0; +} + +/* + * Insert parsers for further node types here. + * + * Each parser takes a pointer to the @node and to the @parent (will be NULL + * for the first device path node). If a device corresponding to @node was + * found below @parent, its reference count should be incremented and the + * device returned in @child. + * + * The return value should be 0 on success or a negative int on failure. + * The special return values 0x01 (EFI_DEV_END_INSTANCE) and 0xFF + * (EFI_DEV_END_ENTIRE) signal the end of the device path, only + * parse_end_path() is supposed to return this. + * + * Be sure to validate the node length and contents before commencing the + * search for a device. + */ + +static long __init parse_end_path(struct efi_dev_path *node, + struct device *parent, struct device **child) +{ + if (node->length != 4) + return -EINVAL; + if (node->sub_type != EFI_DEV_END_INSTANCE && + node->sub_type != EFI_DEV_END_ENTIRE) + return -EINVAL; + if (!parent) + return -ENODEV; + + *child = get_device(parent); + return node->sub_type; +} + +/** + * efi_get_device_by_path - find device by EFI Device Path + * @node: EFI Device Path + * @len: maximum length of EFI Device Path in bytes + * + * Parse a series of EFI Device Path nodes at @node and find the corresponding + * device. If the device was found, its reference count is incremented and a + * pointer to it is returned. The caller needs to drop the reference with + * put_device() after use. The @node pointer is updated to point to the + * location immediately after the "End of Hardware Device Path" node. + * + * If another Device Path instance follows, @len is decremented by the number + * of bytes consumed. Otherwise @len is set to %0. + * + * If a Device Path node is malformed or its corresponding device is not found, + * @node is updated to point to this offending node and an ERR_PTR is returned. + * + * If @len is initially %0, the function returns %NULL. Thus, to iterate over + * all instances in a path, the following idiom may be used: + * + * while (!IS_ERR_OR_NULL(dev = efi_get_device_by_path(&node, &len))) { + * // do something with dev + * put_device(dev); + * } + * if (IS_ERR(dev)) + * // report error + * + * Devices can only be found if they're already instantiated. Most buses + * instantiate devices in the "subsys" initcall level, hence the earliest + * initcall level in which this function should be called is "fs". + * + * Returns the device on success or + * %ERR_PTR(-ENODEV) if no device was found, + * %ERR_PTR(-EINVAL) if a node is malformed or exceeds @len, + * %ERR_PTR(-ENOTSUPP) if support for a node type is not yet implemented. + */ +struct device * __init efi_get_device_by_path(struct efi_dev_path **node, + size_t *len) +{ + struct device *parent = NULL, *child; + long ret = 0; + + if (!*len) + return NULL; + + while (!ret) { + if (*len < 4 || *len < (*node)->length) + ret = -EINVAL; + else if ((*node)->type == EFI_DEV_ACPI && + (*node)->sub_type == EFI_DEV_BASIC_ACPI) + ret = parse_acpi_path(*node, parent, &child); + else if ((*node)->type == EFI_DEV_HW && + (*node)->sub_type == EFI_DEV_PCI) + ret = parse_pci_path(*node, parent, &child); + else if (((*node)->type == EFI_DEV_END_PATH || + (*node)->type == EFI_DEV_END_PATH2)) + ret = parse_end_path(*node, parent, &child); + else + ret = -ENOTSUPP; + + put_device(parent); + if (ret < 0) + return ERR_PTR(ret); + + parent = child; + *node = (void *)*node + (*node)->length; + *len -= (*node)->length; + } + + if (ret == EFI_DEV_END_ENTIRE) + *len = 0; + + return child; +} diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 1ac199cd75e7..92914801e388 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -23,7 +23,10 @@ #include <linux/of.h> #include <linux/of_fdt.h> #include <linux/io.h> +#include <linux/kexec.h> #include <linux/platform_device.h> +#include <linux/random.h> +#include <linux/reboot.h> #include <linux/slab.h> #include <linux/acpi.h> #include <linux/ucs2_string.h> @@ -48,6 +51,7 @@ struct efi __read_mostly efi = { .esrt = EFI_INVALID_TABLE_ADDR, .properties_table = EFI_INVALID_TABLE_ADDR, .mem_attr_table = EFI_INVALID_TABLE_ADDR, + .rng_seed = EFI_INVALID_TABLE_ADDR, }; EXPORT_SYMBOL(efi); @@ -259,8 +263,10 @@ static __init int efivar_ssdt_load(void) } data = kmalloc(size, GFP_KERNEL); - if (!data) + if (!data) { + ret = -ENOMEM; goto free_entry; + } ret = efivar_entry_get(entry, NULL, &size, data); if (ret) { @@ -438,6 +444,7 @@ static __initdata efi_config_table_type_t common_tables[] = { {EFI_SYSTEM_RESOURCE_TABLE_GUID, "ESRT", &efi.esrt}, {EFI_PROPERTIES_TABLE_GUID, "PROP", &efi.properties_table}, {EFI_MEMORY_ATTRIBUTES_TABLE_GUID, "MEMATTR", &efi.mem_attr_table}, + {LINUX_EFI_RANDOM_SEED_TABLE_GUID, "RNG", &efi.rng_seed}, {NULL_GUID, NULL, NULL}, }; @@ -499,6 +506,29 @@ int __init efi_config_parse_tables(void *config_tables, int count, int sz, pr_cont("\n"); set_bit(EFI_CONFIG_TABLES, &efi.flags); + if (efi.rng_seed != EFI_INVALID_TABLE_ADDR) { + struct linux_efi_random_seed *seed; + u32 size = 0; + + seed = early_memremap(efi.rng_seed, sizeof(*seed)); + if (seed != NULL) { + size = seed->size; + early_memunmap(seed, sizeof(*seed)); + } else { + pr_err("Could not map UEFI random seed!\n"); + } + if (size > 0) { + seed = early_memremap(efi.rng_seed, + sizeof(*seed) + size); + if (seed != NULL) { + add_device_randomness(seed->bits, seed->size); + early_memunmap(seed, sizeof(*seed) + size); + } else { + pr_err("Could not map UEFI random seed!\n"); + } + } + } + /* Parse the EFI Properties table if it exists */ if (efi.properties_table != EFI_INVALID_TABLE_ADDR) { efi_properties_table_t *tbl; @@ -822,3 +852,47 @@ int efi_status_to_err(efi_status_t status) return err; } + +#ifdef CONFIG_KEXEC +static int update_efi_random_seed(struct notifier_block *nb, + unsigned long code, void *unused) +{ + struct linux_efi_random_seed *seed; + u32 size = 0; + + if (!kexec_in_progress) + return NOTIFY_DONE; + + seed = memremap(efi.rng_seed, sizeof(*seed), MEMREMAP_WB); + if (seed != NULL) { + size = min(seed->size, 32U); + memunmap(seed); + } else { + pr_err("Could not map UEFI random seed!\n"); + } + if (size > 0) { + seed = memremap(efi.rng_seed, sizeof(*seed) + size, + MEMREMAP_WB); + if (seed != NULL) { + seed->size = size; + get_random_bytes(seed->bits, seed->size); + memunmap(seed); + } else { + pr_err("Could not map UEFI random seed!\n"); + } + } + return NOTIFY_DONE; +} + +static struct notifier_block efi_random_seed_nb = { + .notifier_call = update_efi_random_seed, +}; + +static int register_update_efi_random_seed(void) +{ + if (efi.rng_seed == EFI_INVALID_TABLE_ADDR) + return 0; + return register_reboot_notifier(&efi_random_seed_nb); +} +late_initcall(register_update_efi_random_seed); +#endif diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 5e23e2d305e7..6621b13c370f 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -36,11 +36,11 @@ arm-deps := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c fdt_empty_tree.c fdt_sw.c sort.c $(obj)/lib-%.o: $(srctree)/lib/%.c FORCE $(call if_changed_rule,cc_o_c) -lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o string.o \ +lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o string.o random.o \ $(patsubst %.c,lib-%.o,$(arm-deps)) lib-$(CONFIG_ARM) += arm32-stub.o -lib-$(CONFIG_ARM64) += arm64-stub.o random.o +lib-$(CONFIG_ARM64) += arm64-stub.o CFLAGS_arm64-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) # diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c index 993aa56755f6..b4f7d78f9e8b 100644 --- a/drivers/firmware/efi/libstub/arm-stub.c +++ b/drivers/firmware/efi/libstub/arm-stub.c @@ -340,6 +340,8 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table, if (status != EFI_SUCCESS) pr_efi_err(sys_table, "Failed initrd from command line!\n"); + efi_random_get_seed(sys_table); + new_fdt_addr = fdt_addr; status = allocate_new_fdt_and_exit_boot(sys_table, handle, &new_fdt_addr, dram_base + MAX_FDT_OFFSET, diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c index aded10662020..757badc1debb 100644 --- a/drivers/firmware/efi/libstub/efi-stub-helper.c +++ b/drivers/firmware/efi/libstub/efi-stub-helper.c @@ -32,15 +32,6 @@ static unsigned long __chunk_size = EFI_READ_CHUNK_SIZE; -/* - * Allow the platform to override the allocation granularity: this allows - * systems that have the capability to run with a larger page size to deal - * with the allocations for initrd and fdt more efficiently. - */ -#ifndef EFI_ALLOC_ALIGN -#define EFI_ALLOC_ALIGN EFI_PAGE_SIZE -#endif - #define EFI_MMAP_NR_SLACK_SLOTS 8 struct file_info { @@ -186,14 +177,16 @@ efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg, goto fail; /* - * Enforce minimum alignment that EFI requires when requesting - * a specific address. We are doing page-based allocations, - * so we must be aligned to a page. + * Enforce minimum alignment that EFI or Linux requires when + * requesting a specific address. We are doing page-based (or + * larger) allocations, and both the address and size must meet + * alignment constraints. */ if (align < EFI_ALLOC_ALIGN) align = EFI_ALLOC_ALIGN; - nr_pages = round_up(size, EFI_ALLOC_ALIGN) / EFI_PAGE_SIZE; + size = round_up(size, EFI_ALLOC_ALIGN); + nr_pages = size / EFI_PAGE_SIZE; again: for (i = 0; i < map_size / desc_size; i++) { efi_memory_desc_t *desc; @@ -208,7 +201,7 @@ again: continue; start = desc->phys_addr; - end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT); + end = start + desc->num_pages * EFI_PAGE_SIZE; if (end > max) end = max; @@ -278,14 +271,16 @@ efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg, goto fail; /* - * Enforce minimum alignment that EFI requires when requesting - * a specific address. We are doing page-based allocations, - * so we must be aligned to a page. + * Enforce minimum alignment that EFI or Linux requires when + * requesting a specific address. We are doing page-based (or + * larger) allocations, and both the address and size must meet + * alignment constraints. */ if (align < EFI_ALLOC_ALIGN) align = EFI_ALLOC_ALIGN; - nr_pages = round_up(size, EFI_ALLOC_ALIGN) / EFI_PAGE_SIZE; + size = round_up(size, EFI_ALLOC_ALIGN); + nr_pages = size / EFI_PAGE_SIZE; for (i = 0; i < map_size / desc_size; i++) { efi_memory_desc_t *desc; unsigned long m = (unsigned long)map; @@ -300,7 +295,7 @@ efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg, continue; start = desc->phys_addr; - end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT); + end = start + desc->num_pages * EFI_PAGE_SIZE; /* * Don't allocate at 0x0. It will confuse code that diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index ee49cd23ee63..b98824e3800a 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -15,6 +15,15 @@ */ #undef __init +/* + * Allow the platform to override the allocation granularity: this allows + * systems that have the capability to run with a larger page size to deal + * with the allocations for initrd and fdt more efficiently. + */ +#ifndef EFI_ALLOC_ALIGN +#define EFI_ALLOC_ALIGN EFI_PAGE_SIZE +#endif + void efi_char16_printk(efi_system_table_t *, efi_char16_t *); efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg, void *__image, @@ -62,4 +71,6 @@ efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg, efi_status_t check_platform_features(efi_system_table_t *sys_table_arg); +efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg); + #endif diff --git a/drivers/firmware/efi/libstub/random.c b/drivers/firmware/efi/libstub/random.c index 0c9f58c5ba50..7e72954d5860 100644 --- a/drivers/firmware/efi/libstub/random.c +++ b/drivers/firmware/efi/libstub/random.c @@ -8,6 +8,7 @@ */ #include <linux/efi.h> +#include <linux/log2.h> #include <asm/efi.h> #include "efistub.h" @@ -41,21 +42,23 @@ efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table_arg, */ static unsigned long get_entry_num_slots(efi_memory_desc_t *md, unsigned long size, - unsigned long align) + unsigned long align_shift) { - u64 start, end; + unsigned long align = 1UL << align_shift; + u64 first_slot, last_slot, region_end; if (md->type != EFI_CONVENTIONAL_MEMORY) return 0; - start = round_up(md->phys_addr, align); - end = round_down(md->phys_addr + md->num_pages * EFI_PAGE_SIZE - size, - align); + region_end = min((u64)ULONG_MAX, md->phys_addr + md->num_pages*EFI_PAGE_SIZE - 1); - if (start > end) + first_slot = round_up(md->phys_addr, align); + last_slot = round_down(region_end - size + 1, align); + + if (first_slot > last_slot) return 0; - return (end - start + 1) / align; + return ((unsigned long)(last_slot - first_slot) >> align_shift) + 1; } /* @@ -98,7 +101,7 @@ efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg, efi_memory_desc_t *md = (void *)memory_map + map_offset; unsigned long slots; - slots = get_entry_num_slots(md, size, align); + slots = get_entry_num_slots(md, size, ilog2(align)); MD_NUM_SLOTS(md) = slots; total_slots += slots; } @@ -141,3 +144,51 @@ efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg, return status; } + +#define RANDOM_SEED_SIZE 32 + +efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg) +{ + efi_guid_t rng_proto = EFI_RNG_PROTOCOL_GUID; + efi_guid_t rng_algo_raw = EFI_RNG_ALGORITHM_RAW; + efi_guid_t rng_table_guid = LINUX_EFI_RANDOM_SEED_TABLE_GUID; + struct efi_rng_protocol *rng; + struct linux_efi_random_seed *seed; + efi_status_t status; + + status = efi_call_early(locate_protocol, &rng_proto, NULL, + (void **)&rng); + if (status != EFI_SUCCESS) + return status; + + status = efi_call_early(allocate_pool, EFI_RUNTIME_SERVICES_DATA, + sizeof(*seed) + RANDOM_SEED_SIZE, + (void **)&seed); + if (status != EFI_SUCCESS) + return status; + + status = rng->get_rng(rng, &rng_algo_raw, RANDOM_SEED_SIZE, + seed->bits); + if (status == EFI_UNSUPPORTED) + /* + * Use whatever algorithm we have available if the raw algorithm + * is not implemented. + */ + status = rng->get_rng(rng, NULL, RANDOM_SEED_SIZE, + seed->bits); + + if (status != EFI_SUCCESS) + goto err_freepool; + + seed->size = RANDOM_SEED_SIZE; + status = efi_call_early(install_configuration_table, &rng_table_guid, + seed); + if (status != EFI_SUCCESS) + goto err_freepool; + + return EFI_SUCCESS; + +err_freepool: + efi_call_early(free_pool, seed); + return status; +} diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c index f61bb52be318..8cd578f62059 100644 --- a/drivers/firmware/efi/test/efi_test.c +++ b/drivers/firmware/efi/test/efi_test.c @@ -8,7 +8,6 @@ * */ -#include <linux/version.h> #include <linux/miscdevice.h> #include <linux/module.h> #include <linux/init.h> @@ -156,7 +155,7 @@ static long efi_runtime_get_variable(unsigned long arg) { struct efi_getvariable __user *getvariable_user; struct efi_getvariable getvariable; - unsigned long datasize, prev_datasize, *dz; + unsigned long datasize = 0, prev_datasize, *dz; efi_guid_t vendor_guid, *vd = NULL; efi_status_t status; efi_char16_t *name = NULL; @@ -266,14 +265,10 @@ static long efi_runtime_set_variable(unsigned long arg) return rv; } - data = kmalloc(setvariable.data_size, GFP_KERNEL); - if (!data) { + data = memdup_user(setvariable.data, setvariable.data_size); + if (IS_ERR(data)) { kfree(name); - return -ENOMEM; - } - if (copy_from_user(data, setvariable.data, setvariable.data_size)) { - rv = -EFAULT; - goto out; + return PTR_ERR(data); } status = efi.set_variable(name, &vendor_guid, @@ -429,7 +424,7 @@ static long efi_runtime_get_nextvariablename(unsigned long arg) efi_guid_t *vd = NULL; efi_guid_t vendor_guid; efi_char16_t *name = NULL; - int rv; + int rv = 0; getnextvariablename_user = (struct efi_getnextvariablename __user *)arg; diff --git a/drivers/thunderbolt/Kconfig b/drivers/thunderbolt/Kconfig index c121acc15bfe..d35db16aa43f 100644 --- a/drivers/thunderbolt/Kconfig +++ b/drivers/thunderbolt/Kconfig @@ -1,6 +1,8 @@ menuconfig THUNDERBOLT tristate "Thunderbolt support for Apple devices" depends on PCI + depends on X86 || COMPILE_TEST + select APPLE_PROPERTIES if EFI_STUB && X86 select CRC32 help Cactus Ridge Thunderbolt Controller driver diff --git a/drivers/thunderbolt/eeprom.c b/drivers/thunderbolt/eeprom.c index 2b9602c2c355..6392990c984d 100644 --- a/drivers/thunderbolt/eeprom.c +++ b/drivers/thunderbolt/eeprom.c @@ -5,6 +5,7 @@ */ #include <linux/crc32.h> +#include <linux/property.h> #include <linux/slab.h> #include "tb.h" @@ -360,6 +361,40 @@ static int tb_drom_parse_entries(struct tb_switch *sw) } /** + * tb_drom_copy_efi - copy drom supplied by EFI to sw->drom if present + */ +static int tb_drom_copy_efi(struct tb_switch *sw, u16 *size) +{ + struct device *dev = &sw->tb->nhi->pdev->dev; + int len, res; + + len = device_property_read_u8_array(dev, "ThunderboltDROM", NULL, 0); + if (len < 0 || len < sizeof(struct tb_drom_header)) + return -EINVAL; + + sw->drom = kmalloc(len, GFP_KERNEL); + if (!sw->drom) + return -ENOMEM; + + res = device_property_read_u8_array(dev, "ThunderboltDROM", sw->drom, + len); + if (res) + goto err; + + *size = ((struct tb_drom_header *)sw->drom)->data_len + + TB_DROM_DATA_START; + if (*size > len) + goto err; + + return 0; + +err: + kfree(sw->drom); + sw->drom = NULL; + return -EINVAL; +} + +/** * tb_drom_read - copy drom to sw->drom and parse it */ int tb_drom_read(struct tb_switch *sw) @@ -374,6 +409,13 @@ int tb_drom_read(struct tb_switch *sw) if (tb_route(sw) == 0) { /* + * Apple's NHI EFI driver supplies a DROM for the root switch + * in a device property. Use it if available. + */ + if (tb_drom_copy_efi(sw, &size) == 0) + goto parse; + + /* * The root switch contains only a dummy drom (header only, * no entries). Hardcode the configuration here. */ @@ -418,6 +460,7 @@ int tb_drom_read(struct tb_switch *sw) if (res) goto err; +parse: header = (void *) sw->drom; if (header->data_len + TB_DROM_DATA_START != size) { diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 9840fdecb73b..c6f30b1695a9 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -460,7 +460,7 @@ int tb_switch_resume(struct tb_switch *sw) tb_sw_warn(sw, "uid read failed\n"); return err; } - if (sw->uid != uid) { + if (sw != sw->tb->root_switch && sw->uid != uid) { tb_sw_info(sw, "changed while suspended (uid %#llx -> %#llx)\n", sw->uid, uid); diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c index 37a37c4d04cb..8c4dc1e1f94f 100644 --- a/drivers/video/fbdev/efifb.c +++ b/drivers/video/fbdev/efifb.c @@ -118,6 +118,31 @@ static inline bool fb_base_is_valid(void) return false; } +#define efifb_attr_decl(name, fmt) \ +static ssize_t name##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ +} \ +static DEVICE_ATTR_RO(name) + +efifb_attr_decl(base, "0x%x"); +efifb_attr_decl(linelength, "%u"); +efifb_attr_decl(height, "%u"); +efifb_attr_decl(width, "%u"); +efifb_attr_decl(depth, "%u"); + +static struct attribute *efifb_attrs[] = { + &dev_attr_base.attr, + &dev_attr_linelength.attr, + &dev_attr_width.attr, + &dev_attr_height.attr, + &dev_attr_depth.attr, + NULL +}; +ATTRIBUTE_GROUPS(efifb); + static int efifb_probe(struct platform_device *dev) { struct fb_info *info; @@ -205,14 +230,13 @@ static int efifb_probe(struct platform_device *dev) } else { /* We cannot make this fatal. Sometimes this comes from magic spaces our resource handlers simply don't know about */ - printk(KERN_WARNING - "efifb: cannot reserve video memory at 0x%lx\n", + pr_warn("efifb: cannot reserve video memory at 0x%lx\n", efifb_fix.smem_start); } info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); if (!info) { - printk(KERN_ERR "efifb: cannot allocate framebuffer\n"); + pr_err("efifb: cannot allocate framebuffer\n"); err = -ENOMEM; goto err_release_mem; } @@ -230,16 +254,15 @@ static int efifb_probe(struct platform_device *dev) info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len); if (!info->screen_base) { - printk(KERN_ERR "efifb: abort, cannot ioremap video memory " - "0x%x @ 0x%lx\n", + pr_err("efifb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", efifb_fix.smem_len, efifb_fix.smem_start); err = -EIO; goto err_release_fb; } - printk(KERN_INFO "efifb: framebuffer at 0x%lx, using %dk, total %dk\n", + pr_info("efifb: framebuffer at 0x%lx, using %dk, total %dk\n", efifb_fix.smem_start, size_remap/1024, size_total/1024); - printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", + pr_info("efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", efifb_defined.xres, efifb_defined.yres, efifb_defined.bits_per_pixel, efifb_fix.line_length, screen_info.pages); @@ -247,7 +270,7 @@ static int efifb_probe(struct platform_device *dev) efifb_defined.xres_virtual = efifb_defined.xres; efifb_defined.yres_virtual = efifb_fix.smem_len / efifb_fix.line_length; - printk(KERN_INFO "efifb: scrolling: redraw\n"); + pr_info("efifb: scrolling: redraw\n"); efifb_defined.yres_virtual = efifb_defined.yres; /* some dummy values for timing to make fbset happy */ @@ -265,7 +288,7 @@ static int efifb_probe(struct platform_device *dev) efifb_defined.transp.offset = screen_info.rsvd_pos; efifb_defined.transp.length = screen_info.rsvd_size; - printk(KERN_INFO "efifb: %s: " + pr_info("efifb: %s: " "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", "Truecolor", screen_info.rsvd_size, @@ -285,12 +308,19 @@ static int efifb_probe(struct platform_device *dev) info->fix = efifb_fix; info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE; - if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) { - printk(KERN_ERR "efifb: cannot allocate colormap\n"); + err = sysfs_create_groups(&dev->dev.kobj, efifb_groups); + if (err) { + pr_err("efifb: cannot add sysfs attrs\n"); goto err_unmap; } - if ((err = register_framebuffer(info)) < 0) { - printk(KERN_ERR "efifb: cannot register framebuffer\n"); + err = fb_alloc_cmap(&info->cmap, 256, 0); + if (err < 0) { + pr_err("efifb: cannot allocate colormap\n"); + goto err_groups; + } + err = register_framebuffer(info); + if (err < 0) { + pr_err("efifb: cannot register framebuffer\n"); goto err_fb_dealoc; } fb_info(info, "%s frame buffer device\n", info->fix.id); @@ -298,6 +328,8 @@ static int efifb_probe(struct platform_device *dev) err_fb_dealoc: fb_dealloc_cmap(&info->cmap); +err_groups: + sysfs_remove_groups(&dev->dev.kobj, efifb_groups); err_unmap: iounmap(info->screen_base); err_release_fb: @@ -313,6 +345,7 @@ static int efifb_remove(struct platform_device *pdev) struct fb_info *info = platform_get_drvdata(pdev); unregister_framebuffer(info); + sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); framebuffer_release(info); return 0; diff --git a/include/linux/efi.h b/include/linux/efi.h index 2d089487d2da..a07a476178cd 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -443,6 +443,22 @@ typedef struct { #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 +typedef struct { + u32 version; + u32 get; + u32 set; + u32 del; + u32 get_all; +} apple_properties_protocol_32_t; + +typedef struct { + u64 version; + u64 get; + u64 set; + u64 del; + u64 get_all; +} apple_properties_protocol_64_t; + /* * Types and defines for EFI ResetSystem */ @@ -589,8 +605,10 @@ void efi_native_runtime_setup(void); #define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0) #define EFI_PROPERTIES_TABLE_GUID EFI_GUID(0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5) #define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44) +#define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61) #define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20) #define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d) +#define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0) /* * This GUID is used to pass to the kernel proper the struct screen_info @@ -599,6 +617,7 @@ void efi_native_runtime_setup(void); */ #define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95) #define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f) +#define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b) typedef struct { efi_guid_t guid; @@ -872,6 +891,7 @@ extern struct efi { unsigned long esrt; /* ESRT table */ unsigned long properties_table; /* properties table */ unsigned long mem_attr_table; /* memory attributes table */ + unsigned long rng_seed; /* UEFI firmware random seed */ efi_get_time_t *get_time; efi_set_time_t *set_time; efi_get_wakeup_time_t *get_wakeup_time; @@ -1145,6 +1165,26 @@ struct efi_generic_dev_path { u16 length; } __attribute ((packed)); +struct efi_dev_path { + u8 type; /* can be replaced with unnamed */ + u8 sub_type; /* struct efi_generic_dev_path; */ + u16 length; /* once we've moved to -std=c11 */ + union { + struct { + u32 hid; + u32 uid; + } acpi; + struct { + u8 fn; + u8 dev; + } pci; + }; +} __attribute ((packed)); + +#if IS_ENABLED(CONFIG_EFI_DEV_PATH_PARSER) +struct device *efi_get_device_by_path(struct efi_dev_path **node, size_t *len); +#endif + static inline void memrange_efi_to_native(u64 *addr, u64 *npages) { *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); @@ -1493,4 +1533,10 @@ efi_status_t efi_exit_boot_services(efi_system_table_t *sys_table, struct efi_boot_memmap *map, void *priv, efi_exit_boot_map_processing priv_func); + +struct linux_efi_random_seed { + u32 size; + u8 bits[]; +}; + #endif /* _LINUX_EFI_H */ |