[RESEND PATCH v3 0/2] RISC-V: mm: Make SV48 the default address space

[Charlie Jenkins]

Make sv48 the default address space for mmap as some applications
currently depend on this assumption. Also enable users to select
desired address space using a non-zero hint address to mmap. Previous
kernel changes caused Java and other applications to be broken on sv57
which this patch fixes.

Documentation is also added to the RISC-V virtual memory section to explain
these changes.

Charlie Jenkins (2):
  RISC-V: mm: Restrict address space for sv39,sv48,sv57
  RISC-V: mm: Update documentation and include test

 Documentation/riscv/vm-layout.rst             | 22 +++++++++
 arch/riscv/include/asm/elf.h                  |  2 +-
 arch/riscv/include/asm/pgtable.h              | 21 ++++++--
 arch/riscv/include/asm/processor.h            | 34 ++++++++++---
 tools/testing/selftests/riscv/Makefile        |  2 +-
 tools/testing/selftests/riscv/mm/.gitignore   |  1 +
 tools/testing/selftests/riscv/mm/Makefile     | 21 ++++++++
 .../selftests/riscv/mm/testcases/mmap.c       | 49 +++++++++++++++++++
 8 files changed, 139 insertions(+), 13 deletions(-)
 create mode 100644 tools/testing/selftests/riscv/mm/.gitignore
 create mode 100644 tools/testing/selftests/riscv/mm/Makefile
 create mode 100644 tools/testing/selftests/riscv/mm/testcases/mmap.c

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2.41.0