The existing ChromiumOS bootmeth only supports reading a single kernel partition, either 2 or 4. In fact there are normally two options available.
Use the GUID to detect kernel partitions, with the BOOTMETHF_ANY_PART flag, so that bootstd does not require a valid filesystem before calling the bootmeth.
Tidy up and improve the logging while we are here.
Signed-off-by: Simon Glass sjg@chromium.org Suggested-by: Alper Nebi Yasak alpernebiyasak@gmail.com ---
Changes in v2: - Rebase to -next
boot/Kconfig | 2 ++ boot/bootmeth_cros.c | 48 +++++++++++++++++++++++++++----------------- test/boot/bootflow.c | 5 +++-- 3 files changed, 35 insertions(+), 20 deletions(-)
diff --git a/boot/Kconfig b/boot/Kconfig index 5e2d4286aeaa..b385902b53fe 100644 --- a/boot/Kconfig +++ b/boot/Kconfig @@ -466,6 +466,8 @@ config BOOTMETH_CROS bool "Bootdev support for Chromium OS" depends on X86 || ARM || SANDBOX default y if !ARM + select PARTITION_TYPE_GUID + select PARTITION_UUIDS help Enables support for booting Chromium OS using bootdevs. This uses the kernel A slot and obtains the kernel command line from the parameters diff --git a/boot/bootmeth_cros.c b/boot/bootmeth_cros.c index 1776fb1838c6..20e0b1e89c36 100644 --- a/boot/bootmeth_cros.c +++ b/boot/bootmeth_cros.c @@ -16,16 +16,19 @@ #include <bootmeth.h> #include <display_options.h> #include <dm.h> +#include <efi.h> #include <malloc.h> #include <mapmem.h> #include <part.h> #include <linux/sizes.h> #include "bootmeth_cros.h"
+static const efi_guid_t cros_kern_type = PARTITION_CROS_KERNEL; + /* * Layout of the ChromeOS kernel * - * Partitions 2 and 4 contain kernels + * Partitions 2 and 4 contain kernels with type GUID_CROS_KERNEL * * Contents are: * @@ -145,13 +148,25 @@ static int scan_part(struct udevice *blk, int partnum, { struct blk_desc *desc = dev_get_uclass_plat(blk); struct vb2_keyblock *hdr; + struct uuid type; ulong num_blks; int ret;
+ if (!partnum) + return log_msg_ret("efi", -ENOENT); + ret = part_get_info(desc, partnum, info); if (ret) return log_msg_ret("part", ret);
+ /* Check for kernel partition type */ + log_debug("part %x: type=%s\n", partnum, info->type_guid); + if (uuid_str_to_bin(info->type_guid, (u8 *)&type, UUID_STR_FORMAT_GUID)) + return log_msg_ret("typ", -EINVAL); + + if (memcmp(&cros_kern_type, &type, sizeof(type))) + return log_msg_ret("typ", -ENOEXEC); + /* Make a buffer for the header information */ num_blks = PROBE_SIZE >> desc->log2blksz; log_debug("Reading header, blk=%s, start=%lx, blocks=%lx\n", @@ -167,6 +182,7 @@ static int scan_part(struct udevice *blk, int partnum,
if (memcmp(VB2_KEYBLOCK_MAGIC, hdr->magic, VB2_KEYBLOCK_MAGIC_SIZE)) { free(hdr); + log_debug("no magic\n"); return -ENOENT; }
@@ -340,24 +356,16 @@ static int cros_read_bootflow(struct udevice *dev, struct bootflow *bflow) struct vb2_keyblock *hdr; const char *uuid = NULL; struct cros_priv *priv; - int part, ret; - - log_debug("starting, part=%d\n", bflow->part); + int ret;
- /* We consider the whole disk, not any one partition */ - if (bflow->part) - return log_msg_ret("max", -ENOENT); + log_debug("starting, part=%x\n", bflow->part);
- /* Check partition 2 then 4 */ - part = 2; - ret = scan_part(bflow->blk, part, &info, &hdr); + /* Check for kernel partitions */ + ret = scan_part(bflow->blk, bflow->part, &info, &hdr); if (ret) { - part = 4; - ret = scan_part(bflow->blk, part, &info, &hdr); - if (ret) - return log_msg_ret("scan", ret); + log_debug("- scan failed: err=%d\n", ret); + return log_msg_ret("scan", ret); } - bflow->part = part;
priv = malloc(sizeof(struct cros_priv)); if (!priv) { @@ -366,8 +374,8 @@ static int cros_read_bootflow(struct udevice *dev, struct bootflow *bflow) } bflow->bootmeth_priv = priv;
- log_info("Selected partition %d, header at %lx\n", bflow->part, - (ulong)map_to_sysmem(hdr)); + log_debug("Selected partition %d, header at %lx\n", bflow->part, + (ulong)map_to_sysmem(hdr));
/* Grab a few things from the preamble */ preamble = (void *)hdr + hdr->keyblock_size; @@ -381,8 +389,11 @@ static int cros_read_bootflow(struct udevice *dev, struct bootflow *bflow) ret = cros_read_info(bflow, uuid, preamble); preamble = NULL; free(hdr); - if (ret) + if (ret) { + free(priv->info_buf); + free(priv); return log_msg_ret("inf", ret); + } bflow->size = priv->body_size; bflow->state = BOOTFLOWST_READY;
@@ -437,6 +448,7 @@ static int cros_bootmeth_bind(struct udevice *dev) struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
plat->desc = "ChromiumOS boot"; + plat->flags = BOOTMETHF_ANY_PART;
return 0; } diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c index ae34370981cb..1ff2320c0365 100644 --- a/test/boot/bootflow.c +++ b/test/boot/bootflow.c @@ -983,9 +983,10 @@ static int bootflow_cros(struct unit_test_state *uts) ut_assert_nextlinen("Seq"); ut_assert_nextlinen("---"); ut_assert_nextlinen(" 0 extlinux"); - ut_assert_nextlinen(" 1 cros ready mmc 2 mmc5.bootdev.whole "); + ut_assert_nextlinen(" 1 cros ready mmc 2 mmc5.bootdev.part_2 "); + ut_assert_nextlinen(" 2 cros ready mmc 4 mmc5.bootdev.part_4 "); ut_assert_nextlinen("---"); - ut_assert_skip_to_line("(2 bootflows, 2 valid)"); + ut_assert_skip_to_line("(3 bootflows, 3 valid)");
ut_assert_console_end();