Hi, This patchset adds support for the Enhanced Virtual Addressing feature of the MIPS 3.5 ISA currently present in the *Aptiv processors. In Release 3, the memory architecture defines the partitioning of memory space into fixed‐size segments, whose access properties and cacheability attributes are programmable. The "mapped" and "unmapped" segment‐access properties can now be modified so as to extend system memory space (kseg0/kseg1) to include unmapped access to user space (xkseg), a feature called Enhanced Virtual Addressing (EVA). Instructions that facilitate system read/write access to xkseg have also been added to the R3 ISA (lwe, swe, lbue, etc). This patchset also adds EVA support for the Malta board. The unmapped address space (kseg0/kseg1) has been extended to 2GB. If you want to try it, you can use the 'eva-next' branch on the following git repository https://github.com/hwoarang/linux.git eva-next The patchset applies on top of the upstream-sfr/mips-for-linux-next tree. Leonid Yegoshin (18): MIPS: Kconfig: Add Kconfig symbols for EVA support MIPS: asm: Add prefetch instruction for EVA MIPS: uapi: inst: Add new EVA opcodes MIPS: uapi: inst: Add instruction format for SPECIAL3 instructions MIPS: traps: Set correct address limit for breakpoints and traps MIPS: asm: uaccess: Disable unaligned access macros for EVA MIPS: kernel: unaligned: Handle unaligned accesses for EVA MIPS: asm: checksum: Split kernel and user copy operations MIPS: asm: checksum: Add MIPS specific csum_and_copy_from_user function MIPS: kernel: signal: Prevent save/restore FPU context in user memory MIPS: asm: r4kcache: Build flushing code for instruction cache MIPS: asm: r4kcache: Add protected cache operation for EVA MIPS: asm: r4kcache: Add EVA cache flushing functions MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes MIPS: asm: page: Allow __pa_symbol overrides MIPS: mm: c-r4k: Build EVA {d,i}cache flushing functions MIPS: mm: c-r4k: Flush scache to avoid cache aliases MIPS: malta: malta-init: Fix System Controller memory mapping for EVA Markos Chandras (40): MIPS: asm: Add wrappers for EVA/non-EVA instructions MIPS: futex: Add EVA support for futex operations MIPS: kernel: scall32-o32: Use EVA wrappers to fetch syscall arguments MIPS: kernel: traps: Whitespace clean up MIPS: lib: strnlen_user: Use macro to build the strnlen_user symbol MIPS: lib: strnlen_user: Add EVA support MIPS: lib: strlen_user: Use macro to build the strlen_user symbol MIPS: lib: strlen_user: Add EVA support MIPS: lib: strncpy_user: Use macro to build the strncpy_from_user symbol MIPS: lib: strncpy_user: Add EVA support MIPS: lib: memcpy: Merge EXC and load/store macros MIPS: lib: memcpy: Split source and destination prefetch macros MIPS: lib: memcpy: Use macro to build the copy_user code MIPS: lib: memcpy: Add EVA support MIPS: lib: memset: Whitespace fixes MIPS: lib: memset: Use macro to build the __bzero symbol MIPS: lib: memset: Add EVA support for the __bzero function. MIPS: asm: uaccess: Add instruction argument to __{put,get}_user_asm MIPS: asm: uaccess: Move duplicated code to common function MIPS: asm: uaccess: Use EVA instructions wrappers MIPS: asm: uaccess: Rename {get,put}_user_asm macros MIPS: asm: uaccess: Add EVA support to copy_{in, to,from}_user MIPS: asm: uaccess: Add EVA support for str*_user operations MIPS: kernel: unaligned: Add EVA instruction wrappers MIPS: checksum: Split the 'copy_user' symbol MIPS: lib: csum_partial: Merge EXC and load/store macros MIPS: lib: csum_partial: Add macro to build csum_partial symbols MIPS: lib: csum_partial: Add EVA support MIPS: asm: cpu: Add cpu flag for Enhanced Virtual Addressing MIPS: kernel: cpu-probe: Enable EVA option on supported cores MIPS: kernel: proc: Add EVA to the list of CPU features MIPS: mm: init: Add free_init_pages() callback for EVA MIPS: mm: c-r4k: Add support for flushing user pages from cache MIPS: malta: Configure Segment Control registers for EVA boot MIPS: malta: spaces.h: Add spaces.h file for Malta (EVA) MIPS: malta: malta-memory: Add support for the 'ememsize' variable MIPS: malta: malta-memory: Use the PHYS_OFFSET to build the memory map MIPS: malta: malta-memory: Add free_init_pages_eva() callback MIPS: malta: Add support for SMP EVA MIPS: Enable MIPS 3.5 features on Malta arch/mips/Kconfig | 29 +- arch/mips/include/asm/asm.h | 130 +++++ arch/mips/include/asm/bootinfo.h | 2 + arch/mips/include/asm/checksum.h | 44 +- arch/mips/include/asm/cpu-features.h | 4 +- arch/mips/include/asm/cpu.h | 1 + arch/mips/include/asm/futex.h | 9 +- arch/mips/include/asm/fw/fw.h | 2 +- .../include/asm/mach-malta/kernel-entry-init.h | 115 ++++- arch/mips/include/asm/mach-malta/spaces.h | 46 ++ arch/mips/include/asm/page.h | 2 + arch/mips/include/asm/r4kcache.h | 173 ++++++- arch/mips/include/asm/uaccess.h | 559 ++++++++++++++++----- arch/mips/include/uapi/asm/inst.h | 25 +- arch/mips/kernel/cpu-probe.c | 3 + arch/mips/kernel/ftrace.c | 4 + arch/mips/kernel/head.S | 2 +- arch/mips/kernel/kgdb.c | 17 +- arch/mips/kernel/mips_ksyms.c | 24 +- arch/mips/kernel/proc.c | 1 + arch/mips/kernel/scall32-o32.S | 9 +- arch/mips/kernel/signal.c | 26 + arch/mips/kernel/traps.c | 29 +- arch/mips/kernel/unaligned.c | 135 ++++- arch/mips/lib/csum_partial.S | 282 +++++++---- arch/mips/lib/memcpy.S | 416 ++++++++++----- arch/mips/lib/memset.S | 146 ++++-- arch/mips/lib/strlen_user.S | 36 +- arch/mips/lib/strncpy_user.S | 40 +- arch/mips/lib/strnlen_user.S | 36 +- arch/mips/mm/c-r4k.c | 64 ++- arch/mips/mm/init.c | 12 +- arch/mips/mti-malta/malta-init.c | 13 + arch/mips/mti-malta/malta-memory.c | 58 ++- arch/mips/mti-malta/malta-setup.c | 4 + 35 files changed, 1974 insertions(+), 524 deletions(-) create mode 100644 arch/mips/include/asm/mach-malta/spaces.h -- 1.8.5.3
