u-boot.git/arch/arm/cpu, branch master

Kconfig: arm: restyle

2026-06-25T20:06:18Z

Restyle all Kconfigs for "arm": Menu entries : no space left Menu attributes: 1 TAB Help text : 1 TAB + 2 spaces Replace '---help---' by 'help' Signed-off-by: Johan Jonker Reviewed-by: Tom Rini

Kconfig: armv7: fix typo

2026-06-25T20:06:17Z

While restyling Kconfig the script checkpatch.pl gives this info: WARNING: 'suppport' may be misspelled - perhaps 'support'? Fix by changing 'suppport' to 'support'. Signed-off-by: Johan Jonker Reviewed-by: Tom Rini

treewide: move bi_dram[] from bd to gd

2026-06-25T00:13:24Z

Currently, the bi_dram[] information is stored in the board info structure (bd). Because bd is only valid after reserve_board(), dram_init_banksize() must be called late in the initialization process. This limitation is problematic, as it forces us to rely on a variety of bespoke functions to determine board RAM, bank memory sizes, and other early setup requirements. By moving bi_dram[] into the global data (gd), we can run it earlier. This is particularly convenient since boards define their own dram_init_banksize() routines, which do not always rely on parsing Device Tree (DT) memory nodes. Additionally, U-Boot defaults to relocating to the top of the first memory bank. While boards currently use custom functions to override this behavior, having the DRAM bank information available earlier in gd makes relocating to a different bank trivial and standardizes the process. Reviewed-by: Anshul Dalal Tested-by: Michal Simek # Versal Gen 2 Vek385 Tested-by: Anshul Dalal Reviewed-by: Simon Glass Signed-off-by: Ilias Apalodimas Tested-by: Christophe Leroy (CS GROUP)

Merge tag 'v2026.07-rc5' into next

2026-06-22T22:42:41Z

Prepare v2026.07-rc5

Merge patch series "armv8: mmu: fix region unmapping and optimise set_one_region()"

2026-06-17T15:55:31Z

Casey Connolly says: Currently trying to unmap a region results in slow and largely broken behaviour as we unnecessarily split blocks and manually set thousands of individual 4k pages instead of higher level blocks. This series fixes the behaviour of set_one_region() so that it works properly when called to unmap regions. See patch 4 for details. Patches 1 & 2 improve the existing debug functionality, the pagetable dumper will now print most explicitly unmapped regions (since they still have their PA intact), as well as adding a new function which does a very basic software TLB lookup to help with debugging. Patch 3 de-duplicates some code by moving the loop that always surrounds set_one_region() calls into its own function, this also helps with readability in the calling functions. Link: https://lore.kernel.org/r/20260608-b4-mmu-unmap-fixes-v6-0-ac0764cccf40@linaro.org

armv8: mmu: fix and optimise explicitly unmapping regions

2026-06-17T15:55:00Z

As more platforms start ensuring they explicitly unmap reserved-memory regions a few issues have appeared with how the existing dynamic mapping code works. Fix these and get a small optimisation as well. 1. Teach pte_type() to actually respect the PTE_TYPE_VALID bit 2. Don't walk the TLB a second time if we call mmu_change_region_attr() with PTE_TYPE_FAULT (since it would just be a slow nop) 3. Fix how set_one_region() decides to split blocks. Today set_one_region() will always split blocks until it reaches the smallest granule size (4k) and then update all of these pages. This appears to be due to a big in how is_aligned() is implemented, since it only evaluates to true if addr and size are both multiples of the current granule size, so a mapping aligned to 2M which is 4M in size will cleanly result in 2 blocks being set, but a mapping aligned to 2M which is 4M + 8k in size will result in blocks being split and 1026 individual pages being set. While for the address it is correct to enforce that it is aligned to the current granule size, we only need to check if the region size is greater than the current granule size. This allows us to simplify our second example above to only 4 entries being updated (assuming no blocks have to be split) since we only need to update 2 blocks to map the first 4M, drastically improving the best-case performance. In the case where the address is 4k aligned rather than 2M aligned we will still be restricted to mapping 4k pages until we reach 2M alignment where we could then map a larger 2M granule which previously would never happen. Signed-off-by: Casey Connolly Reviewed-by: Ilias Apalodimas

armv8: mmu: commonize the set_one_region() loop

2026-06-17T15:55:00Z

This loop is duplicated 3 times, put it into its own function and call it instead. This simplifies the logic in a few functions. Reviewed-by: Ilias Apalodimas Signed-off-by: Casey Connolly

armv8: mmu: teach the pagetable dumper to show explicit FAULT maps

2026-06-17T15:55:00Z

When a region is explicitly unmapped (like with mmu_change_region_attr(.... PTE_TYPE_FAULT)) the address translation still remains but won't be used since the region is marked invalid. Print these regions when we dump the pagetable to help with debugging. Signed-off-by: Casey Connolly

armv8: mmu: add a function to help debug TLB lookups

2026-06-17T15:55:00Z

Implement a super basic software TLB walk which can look up a single address in the TLB and print each stage of the translation. This is helpful for debugging TLB issues and will be compiled out if unused. Example output on QEMU aarch64: Performing software TLB lookup of address 0x50100000 va_bits: 40 PTE: 0x47fe0000. addr[47:39]: 0x000 (offset 0x00000) L0: 0x47fe0000 -> TABLE (0x47fe1000) PTE: 0x47fe1000. addr[38:30]: 0x001 (offset 0x00008) L1: 0x47fe1008 -> BLOCK (0x40000000) [0x40000000 - 0x80000000] Reviewed-by: Ilias Apalodimas Signed-off-by: Casey Connolly

arm: mxs: Avoid passing FORCE to commands

2026-06-15T18:49:56Z

Commit bd3f9ee679b4 ("kbuild: Bump the build system to 6.1") adds FORCE as a prerequisite to the if_changed rules here, but the commands use $^ so FORCE leaks in as a stray operand. The dd in cmd_mkalign_mxs fails (silently, since its stderr is discarded) and the binary is never aligned, stat in cmd_mkivt_mxs emits an error and cst receives a bogus argument. Use $< and $(real-prereqs) instead, which exclude FORCE. Fixes: bd3f9ee679b4 ("kbuild: Bump the build system to 6.1") Signed-off-by: Simon Glass