A boot manager like GRUB can use the protocol to
* apply U-Boot's fix-ups to the a device-tree * let U-Boot make memory reservations according to the device-tree * install the device-tree as a configuration table
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- cmd/bootefi.c | 80 ----------------- cmd/efidebug.c | 5 ++ include/efi_dt_fixup.h | 39 ++++++++ include/efi_loader.h | 2 + lib/efi_loader/Makefile | 3 + lib/efi_loader/efi_dt_fixup.c | 160 +++++++++++++++++++++++++++++++++ lib/efi_loader/efi_root_node.c | 6 ++ 7 files changed, 215 insertions(+), 80 deletions(-) create mode 100644 include/efi_dt_fixup.h create mode 100644 lib/efi_loader/efi_dt_fixup.c
diff --git a/cmd/bootefi.c b/cmd/bootefi.c index fdf909f8da..66159b237b 100644 --- a/cmd/bootefi.c +++ b/cmd/bootefi.c @@ -135,86 +135,6 @@ done: return ret; }
-/** - * efi_reserve_memory() - add reserved memory to memory map - * - * @addr: start address of the reserved memory range - * @size: size of the reserved memory range - * @nomap: indicates that the memory range shall not be accessed by the - * UEFI payload - */ -static void efi_reserve_memory(u64 addr, u64 size, bool nomap) -{ - int type; - efi_uintn_t ret; - - /* Convert from sandbox address space. */ - addr = (uintptr_t)map_sysmem(addr, 0); - - if (nomap) - type = EFI_RESERVED_MEMORY_TYPE; - else - type = EFI_BOOT_SERVICES_DATA; - - ret = efi_add_memory_map(addr, size, type); - if (ret != EFI_SUCCESS) - log_err("Reserved memory mapping failed addr %llx size %llx\n", - addr, size); -} - -/** - * efi_carve_out_dt_rsv() - Carve out DT reserved memory ranges - * - * The mem_rsv entries of the FDT are added to the memory map. Any failures are - * ignored because this is not critical and we would rather continue to try to - * boot. - * - * @fdt: Pointer to device tree - */ -static void efi_carve_out_dt_rsv(void *fdt) -{ - int nr_rsv, i; - u64 addr, size; - int nodeoffset, subnode; - - nr_rsv = fdt_num_mem_rsv(fdt); - - /* Look for an existing entry and add it to the efi mem map. */ - for (i = 0; i < nr_rsv; i++) { - if (fdt_get_mem_rsv(fdt, i, &addr, &size) != 0) - continue; - efi_reserve_memory(addr, size, false); - } - - /* process reserved-memory */ - nodeoffset = fdt_subnode_offset(fdt, 0, "reserved-memory"); - if (nodeoffset >= 0) { - subnode = fdt_first_subnode(fdt, nodeoffset); - while (subnode >= 0) { - fdt_addr_t fdt_addr; - fdt_size_t fdt_size; - - /* check if this subnode has a reg property */ - fdt_addr = fdtdec_get_addr_size_auto_parent( - fdt, nodeoffset, subnode, - "reg", 0, &fdt_size, false); - /* - * The /reserved-memory node may have children with - * a size instead of a reg property. - */ - if (fdt_addr != FDT_ADDR_T_NONE && - fdtdec_get_is_enabled(fdt, subnode)) { - bool nomap; - - nomap = !!fdt_getprop(fdt, subnode, "no-map", - NULL); - efi_reserve_memory(fdt_addr, fdt_size, nomap); - } - subnode = fdt_next_subnode(fdt, subnode); - } - } -} - /** * get_config_table() - get configuration table * diff --git a/cmd/efidebug.c b/cmd/efidebug.c index 5288b9920b..b9f76f6dd4 100644 --- a/cmd/efidebug.c +++ b/cmd/efidebug.c @@ -8,6 +8,7 @@ #include <charset.h> #include <common.h> #include <command.h> +#include <efi_dt_fixup.h> #include <efi_loader.h> #include <efi_rng.h> #include <exports.h> @@ -261,6 +262,10 @@ static const struct { "PXE Base Code", EFI_PXE_BASE_CODE_PROTOCOL_GUID, }, + { + "Device-Tree Fixup", + EFI_DT_FIXUP_PROTOCOL_GUID, + }, /* Configuration table GUIDs */ { "ACPI table", diff --git a/include/efi_dt_fixup.h b/include/efi_dt_fixup.h new file mode 100644 index 0000000000..9066e8dd8e --- /dev/null +++ b/include/efi_dt_fixup.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * EFI_DT_FIXUP_PROTOCOL + * + * Copyright (c) 2020 Heinrich Schuchardt + */ + +#include <efi_api.h> + +#define EFI_DT_FIXUP_PROTOCOL_GUID \ + EFI_GUID(0xe617d64c, 0xfe08, 0x46da, 0xf4, 0xdc, \ + 0xbb, 0xd5, 0x87, 0x0c, 0x73, 0x00) + +#define EFI_DT_FIXUP_PROTOCOL_REVISION 0x00010000 + +/* Add nodes and update properties */ +#define EFI_DT_APPLY_FIXUPS 0x00000001 +/* + * Reserve memory according to the /reserved-memory node + * and the memory reservation block + */ +#define EFI_DT_RESERVE_MEMORY 0x00000002 +/* Install the device-tree as configuration table */ +#define EFI_DT_INSTALL_TABLE 0x00000004 + +#define EFI_DT_ALL (EFI_DT_APPLY_FIXUPS | \ + EFI_DT_RESERVE_MEMORY | \ + EFI_DT_INSTALL_TABLE) + +struct efi_dt_fixup_protocol { + u64 revision; + efi_status_t (EFIAPI *fixup) (struct efi_dt_fixup_protocol *this, + void *dtb, + efi_uintn_t *buffer_size, + u32 flags); +}; + +extern struct efi_dt_fixup_protocol efi_dt_fixup_prot; +extern const efi_guid_t efi_guid_dt_fixup_protocol; diff --git a/include/efi_loader.h b/include/efi_loader.h index 3c68b85b68..d291a962e0 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -402,6 +402,8 @@ void efi_runtime_detach(void); /* efi_convert_pointer() - convert pointer to virtual address */ efi_status_t EFIAPI efi_convert_pointer(efi_uintn_t debug_disposition, void **address); +/* Carve out DT reserved memory ranges */ +void efi_carve_out_dt_rsv(void *fdt); /* Called by bootefi to make console interface available */ efi_status_t efi_console_register(void); /* Called by bootefi to make all disk storage accessible as EFI objects */ diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile index cd4b252a41..814aa53f01 100644 --- a/lib/efi_loader/Makefile +++ b/lib/efi_loader/Makefile @@ -27,6 +27,9 @@ obj-y += efi_console.o obj-y += efi_device_path.o obj-$(CONFIG_EFI_DEVICE_PATH_TO_TEXT) += efi_device_path_to_text.o obj-y += efi_device_path_utilities.o +ifeq ($(CONFIG_GENERATE_ACPI_TABLE),) +obj-y += efi_dt_fixup.o +endif obj-y += efi_file.o obj-$(CONFIG_EFI_LOADER_HII) += efi_hii.o efi_hii_config.o obj-y += efi_image_loader.o diff --git a/lib/efi_loader/efi_dt_fixup.c b/lib/efi_loader/efi_dt_fixup.c new file mode 100644 index 0000000000..5f0ae5c338 --- /dev/null +++ b/lib/efi_loader/efi_dt_fixup.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * EFI_DT_FIXUP_PROTOCOL + * + * Copyright (c) 2020 Heinrich Schuchardt + */ + +#include <common.h> +#include <efi_dt_fixup.h> +#include <efi_loader.h> +#include <mapmem.h> + +static efi_status_t EFIAPI efi_dt_fixup(struct efi_dt_fixup_protocol *this, + void *dtb, + efi_uintn_t *buffer_size, + u32 flags); + +struct efi_dt_fixup_protocol efi_dt_fixup_prot = { + .revision = EFI_DT_FIXUP_PROTOCOL_REVISION, + .fixup = efi_dt_fixup +}; + +const efi_guid_t efi_guid_dt_fixup_protocol = EFI_DT_FIXUP_PROTOCOL_GUID; + +/** + * efi_reserve_memory() - add reserved memory to memory map + * + * @addr: start address of the reserved memory range + * @size: size of the reserved memory range + * @nomap: indicates that the memory range shall not be accessed by the + * UEFI payload + */ +static void efi_reserve_memory(u64 addr, u64 size, bool nomap) +{ + int type; + efi_uintn_t ret; + + /* Convert from sandbox address space. */ + addr = (uintptr_t)map_sysmem(addr, 0); + + if (nomap) + type = EFI_RESERVED_MEMORY_TYPE; + else + type = EFI_BOOT_SERVICES_DATA; + + ret = efi_add_memory_map(addr, size, type); + if (ret != EFI_SUCCESS) + log_err("Reserved memory mapping failed addr %llx size %llx\n", + addr, size); +} + +/** + * efi_carve_out_dt_rsv() - Carve out DT reserved memory ranges + * + * The mem_rsv entries of the FDT are added to the memory map. Any failures are + * ignored because this is not critical and we would rather continue to try to + * boot. + * + * @fdt: Pointer to device tree + */ +void efi_carve_out_dt_rsv(void *fdt) +{ + int nr_rsv, i; + u64 addr, size; + int nodeoffset, subnode; + + nr_rsv = fdt_num_mem_rsv(fdt); + + /* Look for an existing entry and add it to the efi mem map. */ + for (i = 0; i < nr_rsv; i++) { + if (fdt_get_mem_rsv(fdt, i, &addr, &size) != 0) + continue; + efi_reserve_memory(addr, size, false); + } + + /* process reserved-memory */ + nodeoffset = fdt_subnode_offset(fdt, 0, "reserved-memory"); + if (nodeoffset >= 0) { + subnode = fdt_first_subnode(fdt, nodeoffset); + while (subnode >= 0) { + fdt_addr_t fdt_addr; + fdt_size_t fdt_size; + + /* check if this subnode has a reg property */ + fdt_addr = fdtdec_get_addr_size_auto_parent( + fdt, nodeoffset, subnode, + "reg", 0, &fdt_size, false); + /* + * The /reserved-memory node may have children with + * a size instead of a reg property. + */ + if (fdt_addr != FDT_ADDR_T_NONE && + fdtdec_get_is_enabled(fdt, subnode)) { + bool nomap; + + nomap = !!fdt_getprop(fdt, subnode, "no-map", + NULL); + efi_reserve_memory(fdt_addr, fdt_size, nomap); + } + subnode = fdt_next_subnode(fdt, subnode); + } + } +} + +static efi_status_t EFIAPI efi_dt_fixup(struct efi_dt_fixup_protocol *this, + void *dtb, + efi_uintn_t *buffer_size, + u32 flags) +{ + efi_status_t ret; + size_t required_size; + bootm_headers_t img = { 0 }; + + EFI_ENTRY("%p, %p, %p, %d", this, dtb, buffer_size, flags); + + if (this != &efi_dt_fixup_prot || !dtb || !buffer_size || + !flags || (flags & ~EFI_DT_ALL)) { + ret = EFI_INVALID_PARAMETER; + goto out; + } + if (fdt_check_header(dtb)) { + ret = EFI_INVALID_PARAMETER; + goto out; + } + if (flags & EFI_DT_APPLY_FIXUPS) { + required_size = fdt_off_dt_strings(dtb) + + fdt_size_dt_strings(dtb) + + 0x3000; + } else { + required_size = fdt_totalsize(dtb); + } + if (required_size > *buffer_size) { + *buffer_size = required_size; + ret = EFI_BUFFER_TOO_SMALL; + goto out; + } + fdt_set_totalsize(dtb, *buffer_size); + + if (flags & EFI_DT_APPLY_FIXUPS) { + if (image_setup_libfdt(&img, dtb, 0, NULL)) { + log_err("failed to process device tree\n"); + ret = EFI_INVALID_PARAMETER; + goto out; + } + } + if (flags & EFI_DT_RESERVE_MEMORY) + efi_carve_out_dt_rsv(dtb); + + if (EFI_DT_INSTALL_TABLE) { + ret = efi_install_configuration_table(&efi_guid_fdt, dtb); + if (ret != EFI_SUCCESS) { + log_err("ERROR: failed to install device tree\n"); + goto out; + } + } + + ret = EFI_SUCCESS; +out: + return EFI_EXIT(ret); +} diff --git a/lib/efi_loader/efi_root_node.c b/lib/efi_loader/efi_root_node.c index f68b0fdc61..649371a6a4 100644 --- a/lib/efi_loader/efi_root_node.c +++ b/lib/efi_loader/efi_root_node.c @@ -7,6 +7,7 @@
#include <common.h> #include <malloc.h> +#include <efi_dt_fixup.h> #include <efi_loader.h>
const efi_guid_t efi_u_boot_guid = U_BOOT_GUID; @@ -60,6 +61,11 @@ efi_status_t efi_root_node_register(void) /* Device path utilities protocol */ &efi_guid_device_path_utilities_protocol, (void *)&efi_device_path_utilities, +#if !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE) + /* Device-tree fix-up protocol */ + &efi_guid_dt_fixup_protocol, + (void *)&efi_dt_fixup_prot, +#endif #if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL2) #if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL) /* Deprecated Unicode collation protocol */ -- 2.29.2