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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-11-16 10:10:27 -0600 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-11-16 10:10:27 -0600 |
| commit | 50d25bdc64318a8a367c4433fa1e030c38331f05 (patch) | |
| tree | eb191d2950ae55da3855254c04db65d62757f4d5 | |
| parent | 59749c2d49bf28df69ac4bcabf1f69b00d3dca59 (diff) | |
| parent | 40dc948f234b73497c3278875eb08a01d5854d3f (diff) | |
| download | linux-50d25bdc64318a8a367c4433fa1e030c38331f05.tar.bz2 | |
Merge tag 'xtensa-20181115' of git://github.com/jcmvbkbc/linux-xtensa
Pull Xtensa fixes from Max Filippov:
- fix stack alignment for bFLT binaries.
- fix physical-to-virtual address translation for boot parameters in
MMUv3 256+256 and 512+512 virtual memory layouts.
* tag 'xtensa-20181115' of git://github.com/jcmvbkbc/linux-xtensa:
xtensa: fix boot parameters address translation
xtensa: make sure bFLT stack is 16 byte aligned
| -rw-r--r-- | arch/xtensa/include/asm/processor.h | 6 | ||||
| -rw-r--r-- | arch/xtensa/kernel/head.S | 7 |
2 files changed, 10 insertions, 3 deletions
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index be9bfd9aa865..34a23016dd14 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -23,7 +23,11 @@ # error Linux requires the Xtensa Windowed Registers Option. #endif -#define ARCH_SLAB_MINALIGN XCHAL_DATA_WIDTH +/* Xtensa ABI requires stack alignment to be at least 16 */ + +#define STACK_ALIGN (XCHAL_DATA_WIDTH > 16 ? XCHAL_DATA_WIDTH : 16) + +#define ARCH_SLAB_MINALIGN STACK_ALIGN /* * User space process size: 1 GB. diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S index 2f76118ecf62..9053a5622d2c 100644 --- a/arch/xtensa/kernel/head.S +++ b/arch/xtensa/kernel/head.S @@ -88,9 +88,12 @@ _SetupMMU: initialize_mmu #if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY rsr a2, excsave1 - movi a3, 0x08000000 + movi a3, XCHAL_KSEG_PADDR + bltu a2, a3, 1f + sub a2, a2, a3 + movi a3, XCHAL_KSEG_SIZE bgeu a2, a3, 1f - movi a3, 0xd0000000 + movi a3, XCHAL_KSEG_CACHED_VADDR add a2, a2, a3 wsr a2, excsave1 1: |