From patchwork Thu Mar 19 16:56:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heinrich Schuchardt X-Patchwork-Id: 243941 List-Id: U-Boot discussion From: xypron.glpk at gmx.de (Heinrich Schuchardt) Date: Thu, 19 Mar 2020 16:56:31 +0000 Subject: [PATCH 1/2] part: detect EFI system partition In-Reply-To: <20200319165632.14014-1-xypron.glpk@gmx.de> References: <20200319165632.14014-1-xypron.glpk@gmx.de> Message-ID: <20200319165632.14014-2-xypron.glpk@gmx.de> Up to now for MBR and GPT partitions the info field 'bootable' was set to 1 if either the partition was an EFI system partition or the bootable flag was set. Turn info field 'bootable' into a bit mask with separate bits for bootable and EFI system partition. This will allow us to identify the EFI system partition in the UEFI sub-system. Signed-off-by: Heinrich Schuchardt --- disk/part_dos.c | 10 ++++++++-- disk/part_efi.c | 12 ++++++++---- include/part.h | 11 ++++++++++- 3 files changed, 26 insertions(+), 7 deletions(-) -- 2.20.1 diff --git a/disk/part_dos.c b/disk/part_dos.c index 83ff40d310..0ec7f1628e 100644 --- a/disk/part_dos.c +++ b/disk/part_dos.c @@ -45,9 +45,15 @@ static inline int is_extended(int part_type) part_type == 0x85); } -static inline int is_bootable(dos_partition_t *p) +static int is_bootable(dos_partition_t *p) { - return (p->sys_ind == 0xef) || (p->boot_ind == 0x80); + int ret = 0; + + if (p->sys_ind == 0xef) + ret |= PART_EFI_SYSTEM_PARTITION; + if (p->boot_ind == 0x80) + ret |= PART_BOOTABLE; + return ret; } static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector, diff --git a/disk/part_efi.c b/disk/part_efi.c index b2e157d9c1..19f1f43f4e 100644 --- a/disk/part_efi.c +++ b/disk/part_efi.c @@ -71,11 +71,15 @@ static char *print_efiname(gpt_entry *pte) static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID; -static inline int is_bootable(gpt_entry *p) +static int is_bootable(gpt_entry *p) { - return p->attributes.fields.legacy_bios_bootable || - !memcmp(&(p->partition_type_guid), &system_guid, - sizeof(efi_guid_t)); + int ret = 0; + + if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t))) + ret |= PART_EFI_SYSTEM_PARTITION; + if (p->attributes.fields.legacy_bios_bootable) + ret |= PART_BOOTABLE; + return ret; } static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba, diff --git a/include/part.h b/include/part.h index 0b5cf3d5e8..a63d1d0cda 100644 --- a/include/part.h +++ b/include/part.h @@ -51,13 +51,22 @@ struct block_drvr { #define PART_TYPE_LEN 32 #define MAX_SEARCH_PARTITIONS 64 +#define PART_BOOTABLE 1 +#define PART_EFI_SYSTEM_PARTITION 2 + typedef struct disk_partition { lbaint_t start; /* # of first block in partition */ lbaint_t size; /* number of blocks in partition */ ulong blksz; /* block size in bytes */ uchar name[PART_NAME_LEN]; /* partition name */ uchar type[PART_TYPE_LEN]; /* string type description */ - int bootable; /* Active/Bootable flag is set */ + /* + * The bootable is a bitmask with the following fields: + * + * PART_BOOTABLE the MBR bootable flag is set + * PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition + */ + int bootable; #if CONFIG_IS_ENABLED(PARTITION_UUIDS) char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */ #endif From patchwork Thu Mar 19 16:56:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heinrich Schuchardt X-Patchwork-Id: 243940 List-Id: U-Boot discussion From: xypron.glpk at gmx.de (Heinrich Schuchardt) Date: Thu, 19 Mar 2020 16:56:32 +0000 Subject: [PATCH 2/2] efi_loader: identify EFI system partition In-Reply-To: <20200319165632.14014-1-xypron.glpk@gmx.de> References: <20200319165632.14014-1-xypron.glpk@gmx.de> Message-ID: <20200319165632.14014-3-xypron.glpk@gmx.de> For capsule updates we need to identify the EFI system partition. Signed-off-by: Heinrich Schuchardt --- include/efi_loader.h | 7 +++++++ lib/efi_loader/efi_disk.c | 20 ++++++++++++++++++++ 2 files changed, 27 insertions(+) -- 2.20.1 diff --git a/include/efi_loader.h b/include/efi_loader.h index 37c3f15da1..536ef84cb5 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -45,6 +45,13 @@ static inline void *guidcpy(void *dst, const void *src) /* Root node */ extern efi_handle_t efi_root; +/* EFI system partition */ +extern struct efi_system_partition { + enum if_type if_type; + int devnum; + u8 part; +} efi_system_partition; + int __efi_entry_check(void); int __efi_exit_check(void); const char *__efi_nesting(void); diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c index fc0682bc48..2f752a5e99 100644 --- a/lib/efi_loader/efi_disk.c +++ b/lib/efi_loader/efi_disk.c @@ -13,6 +13,8 @@ #include #include +struct efi_system_partition efi_system_partition; + const efi_guid_t efi_block_io_guid = EFI_BLOCK_IO_PROTOCOL_GUID; /** @@ -372,6 +374,24 @@ static efi_status_t efi_disk_add_dev( diskobj->ops.media = &diskobj->media; if (disk) *disk = diskobj; + + /* Store first EFI system partition */ + if (part && !efi_system_partition.if_type) { + int r; + disk_partition_t info; + + r = part_get_info(desc, part, &info); + if (r) + return EFI_DEVICE_ERROR; + if (info.bootable & PART_EFI_SYSTEM_PARTITION) { + efi_system_partition.if_type = desc->if_type; + efi_system_partition.devnum = desc->devnum; + efi_system_partition.part = part; + EFI_PRINT("EFI system partition: %s %d:%d\n", + blk_get_if_type_name(desc->if_type), + desc->devnum, part); + } + } return EFI_SUCCESS; }