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

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Message-ID: <20230705190002.384799-1-charlie@rivosinc.com>
Date:   Wed,  5 Jul 2023 11:59:40 -0700
From:   Charlie Jenkins <charlie@...osinc.com>
To:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     charlie@...osinc.com, conor@...nel.org, paul.walmsley@...ive.com,
        palmer@...osinc.com, aou@...s.berkeley.edu, anup@...infault.org,
        konstantin@...uxfoundation.org, linux-doc@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-mm@...ck.org,
        mick@....forth.gr, jrtc27@...c27.com
Subject: [RESEND PATCH v3 0/2] RISC-V: mm: Make SV48 the default address space

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

-- 
2.41.0