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Merge patch series "riscv: mm: Fixup & Optimize COMPAT code"

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guoren@kernel.org <guoren@kernel.org> says:

From: Guo Ren <guoren@linux.alibaba.com>

When the task is in COMPAT mode, the TASK_SIZE should be 2GB, so
STACK_TOP_MAX and arch_get_mmap_end must be limited to 2 GB. This series
fixes the problem made by commit: add2cc6b65 ("RISC-V: mm: Restrict
address space for sv39,sv48,sv57") and optimizes the related coding
convention of TASK_SIZE.

* b4-shazam-merge:
  riscv: mm: Fixup compat arch_get_mmap_end
  riscv: mm: Fixup compat mode boot failure

Link: https://lore.kernel.org/r/20231222115703.2404036-1-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Palmer Dabbelt 2024-01-11 08:04:38 -08:00
commit d4abde52b4
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2 changed files with 2 additions and 2 deletions
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2
arch/riscv/include/asm/pgtable.h
View File

@ -864,7 +864,7 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte)
#define TASK_SIZE_MIN (PGDIR_SIZE_L3 * PTRS_PER_PGD / 2)
#ifdef CONFIG_COMPAT
#define TASK_SIZE_32 (_AC(0x80000000, UL) - PAGE_SIZE)
#define TASK_SIZE_32 (_AC(0x80000000, UL))
#define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
TASK_SIZE_32 : TASK_SIZE_64)
#else

2
arch/riscv/include/asm/processor.h
View File

@ -16,7 +16,7 @@
#ifdef CONFIG_64BIT
#define DEFAULT_MAP_WINDOW (UL(1) << (MMAP_VA_BITS - 1))
#define STACK_TOP_MAX TASK_SIZE_64
#define STACK_TOP_MAX TASK_SIZE
#define arch_get_mmap_end(addr, len, flags) \
({ \