Some NVIDIA Tegra devices have GPT entry at a wrong location and others may even not have it at all. So either a custom workaround for GPT parsing or TegraPT support is needed for those devices if we want to support them in upstream kernel. The former solution was already rejected [1], let's try the latter. [1] https://patchwork.ozlabs.org/patch/1240809/ Big thanks to everyone who helped with figuring out the TegraPT format! Changelog: v3: - Fixed "BUG: KASAN: slab-out-of-bounds in tegra_partition". Thanks to Peter Geis for noticing the problem. - The MMC boot partitions scanning is now opt-in. See this patch: mmc: block: Support partition-table scanning on boot partitions - The found MMC boot partitions won't be assigned to the MMC boot block device ever due to the new GENHD_FL_PART_SCAN_ONCE flag. This makes us to ensure that the old behavior of the MMC core is preserved for a non-Tegra MMC-block users. New patches in v3: block: Introduce GENHD_FL_PART_SCAN_ONCE mmc: sdhci-tegra: Enable boot partitions scanning on Tegra20 and Tegra30 v2: - Addressed v1 review comments from Stephen Warren by using BIT for locating BCT position in IRAM. - Added more validations to the TegraPT parser: partition type is verified, eMMC instance ID is verified. - TegraPT parser now doesn't touch any devices other than eMMC. - EKS (encrypted keys) partition is blacklisted now. - Implemented eMMC boot partitions scanning. These new patches are added in a result: mmc: block: Add mmc_bdev_to_part_type() helper mmc: block: Add mmc_bdev_to_area_type() helper mmc: block: Add MMC_QUIRK_RESCAN_MAIN_BLKDEV mmc: block: Enable partition-table scanning for boot partitions partitions/tegra: Implement eMMC boot partitions scanning Dmitry Osipenko (10): mmc: core: Add raw_boot_mult field to mmc_ext_csd mmc: block: Add mmc_bdev_to_card() helper partitions: Introduce NVIDIA Tegra Partition Table block: Introduce GENHD_FL_PART_SCAN_ONCE mmc: block: Add mmc_bdev_to_part_type() helper mmc: block: Add mmc_bdev_to_area_type() helper mmc: block: Add MMC_QUIRK_RESCAN_MAIN_BLKDEV mmc: block: Support partition-table scanning on boot partitions mmc: sdhci-tegra: Enable boot partitions scanning on Tegra20 and Tegra30 partitions/tegra: Implement eMMC boot partitions scanning arch/arm/mach-tegra/tegra.c | 54 +++ block/genhd.c | 2 +- block/partition-generic.c | 13 +- block/partitions/Kconfig | 10 + block/partitions/Makefile | 1 + block/partitions/check.c | 4 + block/partitions/tegra.c | 612 +++++++++++++++++++++++++++++++++ block/partitions/tegra.h | 8 + drivers/mmc/core/block.c | 104 ++++++ drivers/mmc/core/mmc.c | 2 + drivers/mmc/host/sdhci-tegra.c | 10 +- include/linux/genhd.h | 12 + include/linux/mmc/blkdev.h | 15 + include/linux/mmc/card.h | 2 + include/linux/mmc/host.h | 2 + include/soc/tegra/bootdata.h | 46 +++ include/soc/tegra/common.h | 9 + include/soc/tegra/partition.h | 91 +++++ 18 files changed, 993 insertions(+), 4 deletions(-) create mode 100644 block/partitions/tegra.c create mode 100644 block/partitions/tegra.h create mode 100644 include/linux/mmc/blkdev.h create mode 100644 include/soc/tegra/bootdata.h create mode 100644 include/soc/tegra/partition.h -- 2.25.1
