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Subject: Re: [GIT PULL] RISC-V Patches for the 5.14 Merge Window, Part 1
To:     Palmer Dabbelt <palmer@dabbelt.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc:     linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
References: <mhng-423e8bdb-977e-4b99-a1bb-b8c530664a51@palmerdabbelt-glaptop>
From:   Alex Ghiti <alex@ghiti.fr>
Message-ID: <df700c15-a7b6-5a0d-6ebd-484ecc8c7923@ghiti.fr>
Date:   Fri, 9 Jul 2021 21:58:10 +0200
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Le 9/07/2021 ? 16:53, Palmer Dabbelt a ?crit?:
> The following changes since commit 8a4102a0cf07cc76a18f373f6b49485258cc6af4:
> 
>    riscv: mm: Fix W+X mappings at boot (2021-06-01 21:15:09 -0700)
> 
> are available in the Git repository at:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git tags/riscv-for-linus-5.14-mw0
> 
> for you to fetch changes up to 1958e5aef5098e28b7d6e6a2972649901ebecace:
> 
>    riscv: xip: Fix duplicate included asm/pgtable.h (2021-07-06 16:17:40 -0700)
> 
> ----------------------------------------------------------------
> RISC-V Patches for the 5.14 Merge Window, Part 1
> 
> In addition to We have a handful of new features for 5.14:
> 
> * Support for transparent huge pages.
> * Support for generic PCI resources mapping.
> * Support for the mem= kernel parameter.
> * Support for KFENCE.
> * A handful of fixes to avoid W+X mappings in the kernel.
> * Support for VMAP_STACK based overflow detection.
> * An optimized copy_{to,from}_user.
> ----------------------------------------------------------------
> There are some Kconfig merge conflicts.  They should be pretty
> straight-forward, but we do have a symbol out of order -- I thought I had a
> script to check for that, but I guess it doesn't work.  I just sent out a patch
> to fix it up.
> 
> diff --cc arch/riscv/Kconfig
> index 3590eb76000e,469a70bd8da6..d36f3c5029fd
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@@ -60,12 -61,11 +61,12 @@@ config RISC
>          select GENERIC_TIME_VSYSCALL if MMU && 64BIT
>          select HANDLE_DOMAIN_IRQ
>          select HAVE_ARCH_AUDITSYSCALL
> -       select HAVE_ARCH_JUMP_LABEL
> -       select HAVE_ARCH_JUMP_LABEL_RELATIVE
> +       select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
> +       select HAVE_ARCH_JUMP_LABEL_RELATIVE if !XIP_KERNEL
>          select HAVE_ARCH_KASAN if MMU && 64BIT
>          select HAVE_ARCH_KASAN_VMALLOC if MMU && 64BIT
>   +      select HAVE_ARCH_KFENCE if MMU && 64BIT
> -       select HAVE_ARCH_KGDB
> +       select HAVE_ARCH_KGDB if !XIP_KERNEL
>          select HAVE_ARCH_KGDB_QXFER_PKT
>          select HAVE_ARCH_MMAP_RND_BITS if MMU
>          select HAVE_ARCH_SECCOMP_FILTER
> @@@ -81,11 -80,9 +82,14 @@@
>          select HAVE_GCC_PLUGINS
>          select HAVE_GENERIC_VDSO if MMU && 64BIT
>          select HAVE_IRQ_TIME_ACCOUNTING
>   +      select HAVE_KPROBES
>   +      select HAVE_KPROBES_ON_FTRACE
>   +      select HAVE_KRETPROBES
> +       select HAVE_KPROBES if !XIP_KERNEL
> +       select HAVE_KPROBES_ON_FTRACE if !XIP_KERNEL
> +       select HAVE_KRETPROBES if !XIP_KERNEL
>   +      select HAVE_MOVE_PMD
>   +      select HAVE_MOVE_PUD
>          select HAVE_PCI
>          select HAVE_PERF_EVENTS
>          select HAVE_PERF_REGS
> @@@ -108,7 -104,7 +112,8 @@@
>          select SYSCTL_EXCEPTION_TRACE
>          select THREAD_INFO_IN_TASK
>          select UACCESS_MEMCPY if !MMU
>   +      select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT && MMU
> +       select ZONE_DMA32 if 64BIT
> 
>    config ARCH_MMAP_RND_BITS_MIN
>          default 18 if 64BIT
> ----------------------------------------------------------------
> Akira Tsukamoto (1):
>        riscv: __asm_copy_to-from_user: Optimize unaligned memory access and pipeline stall
> 
> Alexandre Ghiti (6):
>        riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED
>        riscv: Simplify xip and !xip kernel address conversion macros

@Palmer: As said in the thread of this patchset multiple times, those 2 
patches should not be merged as it assumes that the base DRAM address is 
always 0x8000_0000 for all rv64 platforms: I don't think it is true, is it?

>        riscv: Introduce set_kernel_memory helper
>        riscv: Map the kernel with correct permissions the first time
>        riscv: Introduce structure that group all variables regarding kernel mapping
>        riscv: Fix PTDUMP output now BPF region moved back to module region
> 
> Bixuan Cui (1):
>        riscv: fix build error when CONFIG_SMP is disabled
> 
> Christoph Hellwig (1):
>        riscv: pass the mm_struct to __sbi_tlb_flush_range
> 
> Guo Ren (3):
>        riscv: Use global mappings for kernel pages
>        riscv: Cleanup unused functions
>        riscv: add ASID-based tlbflushing methods
> 
> Jeff Xie (1):
>        riscv: ptrace: add argn syntax
> 
> Jiapeng Chong (1):
>        riscv: xip: Fix duplicate included asm/pgtable.h
> 
> Jisheng Zhang (7):
>        riscv: mremap speedup - enable HAVE_MOVE_PUD and HAVE_MOVE_PMD
>        riscv: mm: Remove setup_zero_page()
>        riscv: Optimize switch_mm by passing "cpu" to flush_icache_deferred()
>        riscv: Turn has_fpu into a static key if FPU=y
>        riscv: kprobes: Remove redundant kprobe_step_ctx
>        riscv: Add __init section marker to some functions again
>        riscv: mm: init: Consolidate vars, functions
> 
> Kefeng Wang (5):
>        riscv: Move setup_bootmem into paging_init
>        riscv: mm: Drop redundant _sdata and _edata declaration
>        riscv: mm: Use better bitmap_zalloc()
>        riscv: Only initialize swiotlb when necessary
>        riscv: Add mem kernel parameter support
> 
> Liu Shixin (1):
>        riscv: Enable KFENCE for riscv64
> 
> Nanyong Sun (5):
>        riscv: mm: add _PAGE_LEAF macro
>        riscv: mm: make pmd_bad() check leaf condition
>        riscv: mm: add param stride for __sbi_tlb_flush_range
>        riscv: mm: add THP support on 64-bit
>        riscv: mm: fix build errors caused by mk_pmd()
> 
> Palmer Dabbelt (2):
>        RISC-V: Use asm-generic for {in,out}{bwlq}
>        Merge branch 'riscv-wx-mappings' into for-next
> 
> Randy Dunlap (1):
>        riscv: TRANSPARENT_HUGEPAGE: depends on MMU
> 
> Stanislaw Kardach (1):
>        riscv: enable generic PCI resource mapping
> 
> Tong Tiangen (1):
>        riscv: add VMAP_STACK overflow detection
> 
> Vitaly Wool (1):
>        riscv: fix typo in init.c
> 
>   arch/riscv/Kconfig                      |  12 +-
>   arch/riscv/include/asm/asm-prototypes.h |   3 +
>   arch/riscv/include/asm/io.h             |  13 --
>   arch/riscv/include/asm/kfence.h         |  63 +++++++
>   arch/riscv/include/asm/kprobes.h        |   7 -
>   arch/riscv/include/asm/mmu_context.h    |   2 +
>   arch/riscv/include/asm/page.h           |  81 +++++----
>   arch/riscv/include/asm/pci.h            |   2 +
>   arch/riscv/include/asm/pgtable-64.h     |   5 +-
>   arch/riscv/include/asm/pgtable-bits.h   |   5 +
>   arch/riscv/include/asm/pgtable.h        | 171 ++++++++++++++++++-
>   arch/riscv/include/asm/ptrace.h         |  31 ++++
>   arch/riscv/include/asm/sections.h       |  17 ++
>   arch/riscv/include/asm/set_memory.h     |  24 ++-
>   arch/riscv/include/asm/switch_to.h      |  11 +-
>   arch/riscv/include/asm/thread_info.h    |  15 ++
>   arch/riscv/include/asm/tlbflush.h       |   5 +
>   arch/riscv/kernel/asm-offsets.c         |   2 +
>   arch/riscv/kernel/cpufeature.c          |   6 +-
>   arch/riscv/kernel/entry.S               | 108 ++++++++++++
>   arch/riscv/kernel/head.S                |   4 +-
>   arch/riscv/kernel/kexec_relocate.S      |   4 +-
>   arch/riscv/kernel/machine_kexec.c       |   2 +-
>   arch/riscv/kernel/probes/kprobes.c      |  40 +----
>   arch/riscv/kernel/process.c             |   2 +-
>   arch/riscv/kernel/setup.c               |  18 +-
>   arch/riscv/kernel/signal.c              |   4 +-
>   arch/riscv/kernel/traps.c               |  35 ++++
>   arch/riscv/kernel/vmlinux-xip.lds.S     |   1 -
>   arch/riscv/kernel/vmlinux.lds.S         |   2 +-
>   arch/riscv/lib/uaccess.S                | 181 ++++++++++++++++----
>   arch/riscv/mm/context.c                 |  14 +-
>   arch/riscv/mm/fault.c                   |  11 +-
>   arch/riscv/mm/init.c                    | 283 +++++++++++++++-----------------
>   arch/riscv/mm/physaddr.c                |   2 +-
>   arch/riscv/mm/ptdump.c                  |   6 +-
>   arch/riscv/mm/tlbflush.c                |  69 ++++++--
>   37 files changed, 901 insertions(+), 360 deletions(-)
>   create mode 100644 arch/riscv/include/asm/kfence.h
> 
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