diff options
Diffstat (limited to 'sys-boot/grub/files/grub-2.06-010-efi-device-tree-fixup-protocol.patch')
| -rw-r--r-- | sys-boot/grub/files/grub-2.06-010-efi-device-tree-fixup-protocol.patch | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/sys-boot/grub/files/grub-2.06-010-efi-device-tree-fixup-protocol.patch b/sys-boot/grub/files/grub-2.06-010-efi-device-tree-fixup-protocol.patch new file mode 100644 index 0000000..ee7c122 --- /dev/null +++ b/sys-boot/grub/files/grub-2.06-010-efi-device-tree-fixup-protocol.patch @@ -0,0 +1,135 @@ +Device-trees are used to convey information about hardware to the operating +system. Some of the properties are only known at boot time. (One example of +such a property is the number of the boot hart on RISC-V systems.) Therefore +the firmware applies fix-ups to the original device-tree. Some nodes and +properties are added or altered. + +When using GRUB's device-tree command the same fix-ups have to be applied. +The EFI Device Tree Fixup Protocol allows to pass the loaded device tree +to the firmware for this purpose. + +The protocol can + +* add nodes and update properties +* reserve memory according to the /reserved-memory node and the memory + reservation block +* install the device-tree as configuration table + +With the patch GRUB checks if the protocol is installed and invokes it if +available. + +Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> +--- + grub-core/loader/efi/fdt.c | 35 ++++++++++++++++++++++++++++++++++- + include/grub/efi/api.h | 22 ++++++++++++++++++++++ + 2 files changed, 56 insertions(+), 1 deletion(-) + +diff --git a/grub-core/loader/efi/fdt.c b/grub-core/loader/efi/fdt.c +index 57ee81686..58e95eb05 100644 +--- a/grub-core/loader/efi/fdt.c ++++ b/grub-core/loader/efi/fdt.c +@@ -29,6 +29,7 @@ + + static void *loaded_fdt; + static void *fdt; ++static grub_efi_guid_t dt_fixup_guid = GRUB_EFI_DT_FIXUP_PROTOCOL_GUID; + + #define FDT_ADDR_CELLS_STRING "#address-cells" + #define FDT_SIZE_CELLS_STRING "#size-cells" +@@ -36,6 +37,38 @@ static void *fdt; + sizeof (FDT_ADDR_CELLS_STRING) + \ + sizeof (FDT_SIZE_CELLS_STRING)) + ++static void *grub_fdt_fixup (void) ++{ ++ grub_efi_dt_fixup_t *dt_fixup_prot; ++ grub_efi_uintn_t size = 0; ++ grub_efi_status_t status; ++ void *fixup_fdt; ++ ++ dt_fixup_prot = grub_efi_locate_protocol (&dt_fixup_guid, 0); ++ if (! dt_fixup_prot) ++ return loaded_fdt; ++ ++ grub_dprintf ("linux", "EFI_DT_FIXUP_PROTOCOL available\n"); ++ ++ status = efi_call_4 (dt_fixup_prot->fixup, dt_fixup_prot, loaded_fdt, &size, ++ GRUB_EFI_DT_APPLY_FIXUPS | GRUB_EFI_DT_RESERVE_MEMORY); ++ if (status != GRUB_EFI_BUFFER_TOO_SMALL) ++ return loaded_fdt; ++ ++ fixup_fdt = grub_realloc (loaded_fdt, size); ++ if (!fixup_fdt) ++ return loaded_fdt; ++ loaded_fdt = fixup_fdt; ++ ++ status = efi_call_4 (dt_fixup_prot->fixup, dt_fixup_prot, loaded_fdt, &size, ++ GRUB_EFI_DT_APPLY_FIXUPS | GRUB_EFI_DT_RESERVE_MEMORY); ++ ++ if (status == GRUB_EFI_SUCCESS) ++ grub_dprintf ("linux", "Device tree fixed up via EFI_DT_FIXUP_PROTOCOL\n"); ++ ++ return loaded_fdt; ++} ++ + void * + grub_fdt_load (grub_size_t additional_size) + { +@@ -49,7 +82,7 @@ grub_fdt_load (grub_size_t additional_size) + } + + if (loaded_fdt) +- raw_fdt = loaded_fdt; ++ raw_fdt = grub_fdt_fixup(); + else + raw_fdt = grub_efi_get_firmware_fdt(); + +diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h +index 34109861a..8101df0df 100644 +--- a/include/grub/efi/api.h ++++ b/include/grub/efi/api.h +@@ -334,6 +334,11 @@ + { 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0 } \ + } + ++#define GRUB_EFI_DT_FIXUP_PROTOCOL_GUID \ ++ { 0xe617d64c, 0xfe08, 0x46da, \ ++ { 0xf4, 0xdc, 0xbb, 0xd5, 0x87, 0x0c, 0x73, 0x00 } \ ++ } ++ + #define GRUB_EFI_VENDOR_APPLE_GUID \ + { 0x2B0585EB, 0xD8B8, 0x49A9, \ + { 0x8B, 0x8C, 0xE2, 0x1B, 0x01, 0xAE, 0xF2, 0xB7 } \ +@@ -1641,6 +1646,13 @@ enum + GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST = 0x10, + }; + ++enum ++ { ++ GRUB_EFI_DT_APPLY_FIXUPS = 0x01, ++ GRUB_EFI_DT_RESERVE_MEMORY = 0x02, ++ GRUB_EFI_EFI_DT_INSTALL_TABLE = 0x04, ++ }; ++ + struct grub_efi_simple_network + { + grub_uint64_t revision; +@@ -1704,6 +1716,16 @@ struct grub_efi_block_io + }; + typedef struct grub_efi_block_io grub_efi_block_io_t; + ++struct grub_efi_dt_fixup ++{ ++ grub_efi_uint64_t revision; ++ grub_efi_status_t (*fixup) (struct grub_efi_dt_fixup *this, ++ void *fdt, ++ grub_efi_uintn_t *buffer_size, ++ grub_uint32_t flags); ++}; ++typedef struct grub_efi_dt_fixup grub_efi_dt_fixup_t; ++ + struct grub_efi_shim_lock_protocol + { + grub_efi_status_t (*verify) (void *buffer, grub_uint32_t size); +-- +2.30.0 |