Re: [PATCH V11 00/20] riscv: Add COMPAT mode support for rv64

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Hi Palmer,

On Tue, Apr 5, 2022 at 7:06 AM Palmer Dabbelt <palmer@xxxxxxxxxxx> wrote:
>
> On Mon, 04 Apr 2022 07:28:50 PDT (-0700), guoren@xxxxxxxxxx wrote:
> > On Sat, Apr 2, 2022 at 10:04 PM Guo Ren <guoren@xxxxxxxxxx> wrote:
> >>
> >> Hi Palmer,
> >>
> >> Sorry for the late reply, I still want COMPAT to catch up at 5.18..
> >> I've pushed it into my next branch, and it would get in linux-next the
> >> next day. You could have a look at that. The repo is:
> >> https://github.com/c-sky/csky-linux/tree/linux-next
> >>
> >> We still need your sending pull request for COMPAT, thank you very much.
>
> Sorry, but it was still failing the autobuilders on the previous
> versions and Saturday night is way, way too late for a respin of a big
> patch set.
It's my fault to miss the arm64 auto builder problem, and I've fixed it in v12.

>
> > Seems we have already missed 5.18, I just prepared the 5.18-rc1 for
> > you. It solved the arm64 compile problem and some conflicts, Hope you
> > could put it into your for-next (5.19-rc1).
> > https://github.com/c-sky/csky-linux/tree/riscv_compat_v12
>
> This says v11, but that says v12.  I'm going to put the v11 that was
> sent to the lists in a branch for the autobuilders to test again, but
> LMK if there's a difference (maybe by sending the v12?).  Might take a
> bit for me to get everything bumped and tested, my machine's super flaky
> right now...
v11 is based on 5.17-rc8, so you could abandon it.:
https://github.com/c-sky/csky-linux/commits/riscv_compat_v11

v12 is based on 5.18-rc1 (I haven't sent patches series to the list):
https://github.com/c-sky/csky-linux/commits/riscv_compat_v12

A new compile problem has been reported by Nathan and I've fixed it in
v12. I will soon send out the v12 patchset series in the mail list.





>
> >
> >>
> >> On Sat, Apr 2, 2022 at 9:53 PM <guoren@xxxxxxxxxx> wrote:
> >> >
> >> > From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
> >> >
> >> > Currently, most 64-bit architectures (x86, parisc, powerpc, arm64,
> >> > s390, mips, sparc) have supported COMPAT mode. But they all have
> >> > history issues and can't use standard linux unistd.h. RISC-V would
> >> > be first standard __SYSCALL_COMPAT user of include/uapi/asm-generic
> >> > /unistd.h.
> >> >
> >> > The patchset are based on v5.17-rc8, you can compare rv64-compat
> >> > v.s. rv32-native in qemu with following steps:
> >> >
> >> >  - Prepare rv32 rootfs & fw_jump.bin by buildroot.org
> >> >    $ git clone git://git.busybox.net/buildroot
> >> >    $ cd buildroot
> >> >    $ make qemu_riscv32_virt_defconfig O=qemu_riscv32_virt_defconfig
> >> >    $ make -C qemu_riscv32_virt_defconfig
> >> >    $ make qemu_riscv64_virt_defconfig O=qemu_riscv64_virt_defconfig
> >> >    $ make -C qemu_riscv64_virt_defconfig
> >> >    (Got fw_jump.bin & rootfs.ext2 in qemu_riscvXX_virt_defconfig/images)
> >> >
> >> >  - Prepare Linux rv32 & rv64 Image
> >> >    $ git clone git@xxxxxxxxxx:c-sky/csky-linux.git -b riscv_compat_v11 linux
> >> >    $ cd linux
> >> >    $ echo "CONFIG_STRICT_KERNEL_RWX=n" >> arch/riscv/configs/defconfig
> >> >    $ echo "CONFIG_STRICT_MODULE_RWX=n" >> arch/riscv/configs/defconfig
> >> >    $ make ARCH=riscv CROSS_COMPILE=riscv32-buildroot-linux-gnu- O=../build-rv32/ rv32_defconfig
> >> >    $ make ARCH=riscv CROSS_COMPILE=riscv32-buildroot-linux-gnu- O=../build-rv32/ Image
> >> >    $ make ARCH=riscv CROSS_COMPILE=riscv64-buildroot-linux-gnu- O=../build-rv64/ defconfig
> >> >    $ make ARCH=riscv CROSS_COMPILE=riscv64-buildroot-linux-gnu- O=../build-rv64/ Image
> >> >
> >> >  - Prepare Qemu:
> >> >    $ git clone https://gitlab.com/qemu-project/qemu.git -b master linux
> >> >    $ cd qemu
> >> >    $ ./configure --target-list="riscv64-softmmu riscv32-softmmu"
> >> >    $ make
> >> >
> >> > Now let's compare rv64-compat with rv32-native memory footprint with almost the same
> >> > defconfig, rootfs, opensbi in one qemu.
> >> >
> >> >  - Run rv64 with rv32 rootfs in compat mode:
> >> >    $ ./build/qemu-system-riscv64 -cpu rv64 -M virt -m 64m -nographic -bios qemu_riscv64_virt_defconfig/images/fw_jump.bin -kernel build-rv64/Image -drive file qemu_riscv32_virt_defconfig/images/rootfs.ext2,format=raw,id=hd0 -device virtio-blk-device,drive=hd0 -append "rootwait root=/dev/vda ro console=ttyS0 earlycon=sbi" -netdev user,id=net0 -device virtio-net-device,netdev=net0
> >> >
> >> > QEMU emulator version 6.2.50 (v6.2.0-29-g196d7182c8)
> >> > OpenSBI v0.9
> >> > [    0.000000] Linux version 5.16.0-rc6-00017-g750f87086bdd-dirty (guoren@guoren-Z87-HD3) (riscv64-unknown-linux-gnu-gcc (GCC) 10.2.0, GNU ld (GNU Binutils) 2.37) #96 SMP Tue Dec 28 21:01:55 CST 2021
> >> > [    0.000000] OF: fdt: Ignoring memory range 0x80000000 - 0x80200000
> >> > [    0.000000] Machine model: riscv-virtio,qemu
> >> > [    0.000000] earlycon: sbi0 at I/O port 0x0 (options '')
> >> > [    0.000000] printk: bootconsole [sbi0] enabled
> >> > [    0.000000] efi: UEFI not found.
> >> > [    0.000000] Zone ranges:
> >> > [    0.000000]   DMA32    [mem 0x0000000080200000-0x0000000083ffffff]
> >> > [    0.000000]   Normal   empty
> >> > [    0.000000] Movable zone start for each node
> >> > [    0.000000] Early memory node ranges
> >> > [    0.000000]   node   0: [mem 0x0000000080200000-0x0000000083ffffff]
> >> > [    0.000000] Initmem setup node 0 [mem 0x0000000080200000-0x0000000083ffffff]
> >> > [    0.000000] SBI specification v0.2 detected
> >> > [    0.000000] SBI implementation ID=0x1 Version=0x9
> >> > [    0.000000] SBI TIME extension detected
> >> > [    0.000000] SBI IPI extension detected
> >> > [    0.000000] SBI RFENCE extension detected
> >> > [    0.000000] SBI v0.2 HSM extension detected
> >> > [    0.000000] riscv: ISA extensions acdfhimsu
> >> > [    0.000000] riscv: ELF capabilities acdfim
> >> > [    0.000000] percpu: Embedded 17 pages/cpu s30696 r8192 d30744 u69632
> >> > [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 15655
> >> > [    0.000000] Kernel command line: rootwait root=/dev/vda ro console=ttyS0 earlycon=sbi
> >> > [    0.000000] Dentry cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
> >> > [    0.000000] Inode-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
> >> > [    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
> >> > [    0.000000] Virtual kernel memory layout:
> >> > [    0.000000]       fixmap : 0xffffffcefee00000 - 0xffffffceff000000   (2048 kB)
> >> > [    0.000000]       pci io : 0xffffffceff000000 - 0xffffffcf00000000   (  16 MB)
> >> > [    0.000000]      vmemmap : 0xffffffcf00000000 - 0xffffffcfffffffff   (4095 MB)
> >> > [    0.000000]      vmalloc : 0xffffffd000000000 - 0xffffffdfffffffff   (65535 MB)
> >> > [    0.000000]       lowmem : 0xffffffe000000000 - 0xffffffe003e00000   (  62 MB)
> >> > [    0.000000]       kernel : 0xffffffff80000000 - 0xffffffffffffffff   (2047 MB)
> >> > [    0.000000] Memory: 52788K/63488K available (6184K kernel code, 888K rwdata, 1917K rodata, 294K init, 297K bss, 10700K reserved, 0K cma-reserved)
> >> > [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
> >> > [    0.000000] rcu: Hierarchical RCU implementation.
> >> > [    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1.
> >> > [    0.000000] rcu:     RCU debug extended QS entry/exit.
> >> > [    0.000000]  Tracing variant of Tasks RCU enabled.
> >> > [    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
> >> > [    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
> >> > [    0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
> >> > [    0.000000] riscv-intc: 64 local interrupts mapped
> >> > [    0.000000] plic: plic@c000000: mapped 53 interrupts with 1 handlers for 2 contexts.
> >> > ...
> >> > Welcome to Buildroot
> >> > buildroot login: root
> >> > # cat /proc/cpuinfo
> >> > processor       : 0
> >> > hart            : 0
> >> > isa             : rv64imafdcsuh
> >> > mmu             : sv48
> >> >
> >> > # file /bin/busybox
> >> > /bin/busybox: setuid ELF 32-bit LSB shared object, UCB RISC-V, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-riscv32-ilp32d.so.1, for GNU/Linux 5.15.0, stripped
> >> > # ca[   78.386630] random: fast init done
> >> > # cat /proc/meminfo
> >> > MemTotal:          53076 kB
> >> > MemFree:           40264 kB
> >> > MemAvailable:      40244 kB
> >> > Buffers:             236 kB
> >> > Cached:             1560 kB
> >> > SwapCached:            0 kB
> >> > Active:             1700 kB
> >> > Inactive:            516 kB
> >> > Active(anon):         40 kB
> >> > Inactive(anon):      424 kB
> >> > Active(file):       1660 kB
> >> > Inactive(file):       92 kB
> >> > Unevictable:           0 kB
> >> > Mlocked:               0 kB
> >> > SwapTotal:             0 kB
> >> > SwapFree:              0 kB
> >> > Dirty:                 0 kB
> >> > Writeback:             0 kB
> >> > AnonPages:           444 kB
> >> > Mapped:             1188 kB
> >> > Shmem:                44 kB
> >> > KReclaimable:        952 kB
> >> > Slab:               5744 kB
> >> > SReclaimable:        952 kB
> >> > SUnreclaim:         4792 kB
> >> > KernelStack:         624 kB
> >> > PageTables:          156 kB
> >> > NFS_Unstable:          0 kB
> >> > Bounce:                0 kB
> >> > WritebackTmp:          0 kB
> >> > CommitLimit:       26536 kB
> >> > Committed_AS:       1748 kB
> >> > VmallocTotal:   67108863 kB
> >> > VmallocUsed:         652 kB
> >> > VmallocChunk:          0 kB
> >> > Percpu:               80 kB
> >> > #
> >> >
> >> >  - Run rv32 with rv32 rootfs:
> >> >    $ ./build/qemu-system-riscv32 -cpu rv32 -M virt -m 64m -nographic -bios qemu_riscv32_virt_defconfig/images/fw_jump.bin -kernel build-rv32/Image -drive file qemu_riscv32_virt_defconfig/images/rootfs.ext2,format=raw,id=hd0 -device virtio-blk-device,drive=hd0 -append "rootwait root=/dev/vda ro console=ttyS0 earlycon=sbi" -netdev user,id=net0 -device virtio-net-device,netdev=net0
> >> >
> >> > QEMU emulator version 6.2.50 (v6.2.0-29-g196d7182c8)
> >> > OpenSBI v0.9
> >> > [    0.000000] Linux version 5.16.0-rc6-00017-g750f87086bdd-dirty (guoren@guoren-Z87-HD3) (riscv32-buildroot-linux-gnu-gcc.br_real (Buildroot 2021.11-201-g7600ca7960-dirty) 10.3.0, GNU ld (GNU Binutils) 2.36.1) #7 SMP Tue Dec 28 21:02:21 CST 2021
> >> > [    0.000000] OF: fdt: Ignoring memory range 0x80000000 - 0x80400000
> >> > [    0.000000] Machine model: riscv-virtio,qemu
> >> > [    0.000000] earlycon: sbi0 at I/O port 0x0 (options '')
> >> > [    0.000000] printk: bootconsole [sbi0] enabled
> >> > [    0.000000] efi: UEFI not found.
> >> > [    0.000000] Zone ranges:
> >> > [    0.000000]   Normal   [mem 0x0000000080400000-0x0000000083ffffff]
> >> > [    0.000000] Movable zone start for each node
> >> > [    0.000000] Early memory node ranges
> >> > [    0.000000]   node   0: [mem 0x0000000080400000-0x0000000083ffffff]
> >> > [    0.000000] Initmem setup node 0 [mem 0x0000000080400000-0x0000000083ffffff]
> >> > [    0.000000] SBI specification v0.2 detected
> >> > [    0.000000] SBI implementation ID=0x1 Version=0x9
> >> > [    0.000000] SBI TIME extension detected
> >> > [    0.000000] SBI IPI extension detected
> >> > [    0.000000] SBI RFENCE extension detected
> >> > [    0.000000] SBI v0.2 HSM extension detected
> >> > [    0.000000] riscv: ISA extensions acdfhimsu
> >> > [    0.000000] riscv: ELF capabilities acdfim
> >> > [    0.000000] percpu: Embedded 12 pages/cpu s16600 r8192 d24360 u49152
> >> > [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 15240
> >> > [    0.000000] Kernel command line: rootwait root=/dev/vda ro console=ttyS0 earlycon=sbi
> >> > [    0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
> >> > [    0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
> >> > [    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
> >> > [    0.000000] Virtual kernel memory layout:
> >> > [    0.000000]       fixmap : 0x9dc00000 - 0x9e000000   (4096 kB)
> >> > [    0.000000]       pci io : 0x9e000000 - 0x9f000000   (  16 MB)
> >> > [    0.000000]      vmemmap : 0x9f000000 - 0x9fffffff   (  15 MB)
> >> > [    0.000000]      vmalloc : 0xa0000000 - 0xbfffffff   ( 511 MB)
> >> > [    0.000000]       lowmem : 0xc0000000 - 0xc3c00000   (  60 MB)
> >> > [    0.000000] Memory: 51924K/61440K available (6117K kernel code, 695K rwdata, 1594K rodata, 255K init, 241K bss, 9516K reserved, 0K cma-reserved)
> >> > [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
> >> > [    0.000000] rcu: Hierarchical RCU implementation.
> >> > [    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1.
> >> > [    0.000000] rcu:     RCU debug extended QS entry/exit.
> >> > [    0.000000]  Tracing variant of Tasks RCU enabled.
> >> > [    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
> >> > [    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
> >> > [    0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
> >> > [    0.000000] riscv-intc: 32 local interrupts mapped
> >> > [    0.000000] plic: plic@c000000: mapped 53 interrupts with 1 handlers for 2 contexts.
> >> > ...
> >> > Welcome to Buildroot
> >> > buildroot login: root
> >> > # cat /proc/cpuinfo
> >> > processor       : 0
> >> > hart            : 0
> >> > isa             : rv32imafdcsuh
> >> > mmu             : sv32
> >> >
> >> > # file /bin/busybox
> >> > /bin/busybox: setuid ELF 32-bit LSB shared object, UCB RISC-V, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-riscv32-ilp32d.so.1, for GNU/Linux 5.15.0, stripped
> >> > [   79.320589] random: fast init done
> >> > # cat /proc/meminfo
> >> > MemTotal:          52176 kB
> >> > MemFree:           41012 kB
> >> > MemAvailable:      42176 kB
> >> > Buffers:             644 kB
> >> > Cached:             2724 kB
> >> > SwapCached:            0 kB
> >> > Active:             3128 kB
> >> > Inactive:            752 kB
> >> > Active(anon):         40 kB
> >> > Inactive(anon):      516 kB
> >> > Active(file):       3088 kB
> >> > Inactive(file):      236 kB
> >> > Unevictable:           0 kB
> >> > Mlocked:               0 kB
> >> > SwapTotal:             0 kB
> >> > SwapFree:              0 kB
> >> > Dirty:                 4 kB
> >> > Writeback:             0 kB
> >> > AnonPages:           556 kB
> >> > Mapped:             2172 kB
> >> > Shmem:                44 kB
> >> > KReclaimable:        656 kB
> >> > Slab:               3684 kB
> >> > SReclaimable:        656 kB
> >> > SUnreclaim:         3028 kB
> >> > KernelStack:         312 kB
> >> > PageTables:           88 kB
> >> > NFS_Unstable:          0 kB
> >> > Bounce:                0 kB
> >> > WritebackTmp:          0 kB
> >> > CommitLimit:       26088 kB
> >> > Committed_AS:       2088 kB
> >> > VmallocTotal:     524287 kB
> >> > VmallocUsed:          12 kB
> >> > VmallocChunk:          0 kB
> >> > Percpu:               60 kB
> >> > #
> >> >
> >> >  Some conclusions:
> >> >  - kernel statics:
> >> >    64: Memory: 52788K/63488K available (6184K kernel code, 888K rwdata, 1917K rodata, 294K init, 297K bss, 10700K reserved)
> >> >    32: Memory: 51924K/61440K available (6117K kernel code, 695K rwdata, 1594K rodata, 255K init, 241K bss,  9516K reserved)
> >> >    rv32 better than rv64:                  1%               22%           17%          13%        19%         11%
> >> >    The code size is very similar, but data size rv32 would be better.
> >> >
> >> >  - rv32 kernel runtime KernelStack, Slab... are smaller,
> >> >    rv64: MemTotal: 53076 kB,        MemFree: 40264 kB
> >> >    rv32: MemTotal: 52176 + 2048 kB, MemFree: 41012  + 2048 kB
> >> >    rv32 better than rv64:       2%                         6%
> >> >
> >> >    (Because opensbi problem, we could add another 2MB for rv32.)
> >> >    Overall in 64MB memory situation, rv64-compat is 6% worse than rv32-native
> >> >    at memory footprint. If the userspace memory usage increases, I think
> >> >    the gap will be further reduced.
> >> >
> >> > Changes in v11:
> >> >  - Using arch instead of kconfig for commit subject by Masahiro Yamada
> >> >
> >> > Changes in v10:
> >> >  - Fixup arm64 compile error with compat_statfs definition
> >> >  - Fixup compat_sys_fadvise64_64 function arguments error cause ltp failure
> >> >
> >> > Changes in v9:
> >> >  - Fixup rv32 call rv64 segment fault
> >> >  - Ready for 5.18
> >> >
> >> > Changes in v8:
> >> >  - Enhanced elf_check_arch with EI_CLASS
> >> >  - Fixup SR_UXL doesn't exist in CONFIG_32BIT
> >> >  - Add Tested-by with Heiko
> >> >  - Update qemu compile tips with upstream repo
> >> >
> >> > Changes in v7:
> >> >  - Re-construct compat_vdso/Makefile
> >> >  - Fixup disable COMPAT compile error by csr.h's macro.
> >> >  - Optimize coding convention for lo/hi in compat.h
> >> >
> >> > Changes in v6:
> >> >  - Rebase on linux-5.17-rc5
> >> >  - Optimize hw capability check for elf
> >> >  - Optimize comment in thread_info.h
> >> >  - Optimize start_thread with SR_UXL setting
> >> >  - Optimize vdso.c with direct panic
> >> >
> >> > Changes in v5:
> >> >  - Rebase on linux-5.17-rc2
> >> >  - Include consolidate the fcntl patches by Christoph Hellwig
> >> >  - Remove F_GETLK64/F_SETLK64/F_SETLKW64 from asm/compat.h
> >> >  - Change COMPAT_RLIM_INFINITY from 0x7fffffff to 0xffffffff
> >> >  - Bring back "Add hw-cap detect in setup_arch patch" in v1
> >> >
> >> > Changes in v4:
> >> >  - Rebase on linux-5.17-rc1
> >> >  - Optimize compat_sys_call_table implementation with Arnd's advice
> >> >  - Add reviewed-by for Arnd. Thx :)
> >> >  - Remove FIXME comment in elf.h
> >> >  - Optimize Cleanup duplicate definitions in compat.h with Arnd's advice
> >> >
> >> > Changes in v3:
> >> >  - Rebase on newest master (pre linux-5.17-rc1)
> >> >  - Using newest qemu version v7 for test
> >> >  - Remove fcntl common modification
> >> >  - Fixup SET_PERSONALITY in elf.h by Arnd
> >> >  - Fixup KVM Kconfig
> >> >  - Update Acked-by & Reviewed-by
> >> >
> >> > Changes in v2:
> >> >  - Add __ARCH_WANT_COMPAT_STAT suggested
> >> >  - Cleanup fcntl compatduplicate definitions
> >> >  - Cleanup compat.h
> >> >  - Move rv32_defconfig into Makefile
> >> >  - Fixup rv64 rootfs boot failed, remove hw_compat_mode_detect
> >> >  - Move SYSVIPC_COMPAT into init/Kconfig
> >> >  - Simplify compat_elf_check
> >> >
> >> > Christoph Hellwig (3):
> >> >   uapi: simplify __ARCH_FLOCK{,64}_PAD a little
> >> >   uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h
> >> >   compat: consolidate the compat_flock{,64} definition
> >> >
> >> > Guo Ren (17):
> >> >   arch: Add SYSVIPC_COMPAT for all architectures
> >> >   fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT
> >> >   asm-generic: compat: Cleanup duplicate definitions
> >> >   syscalls: compat: Fix the missing part for __SYSCALL_COMPAT
> >> >   riscv: Fixup difference with defconfig
> >> >   riscv: compat: Add basic compat data type implementation
> >> >   riscv: compat: Support TASK_SIZE for compat mode
> >> >   riscv: compat: syscall: Add compat_sys_call_table implementation
> >> >   riscv: compat: syscall: Add entry.S implementation
> >> >   riscv: compat: process: Add UXL_32 support in start_thread
> >> >   riscv: compat: Add elf.h implementation
> >> >   riscv: compat: Add hw capability check for elf
> >> >   riscv: compat: vdso: Add COMPAT_VDSO base code implementation
> >> >   riscv: compat: vdso: Add setup additional pages implementation
> >> >   riscv: compat: signal: Add rt_frame implementation
> >> >   riscv: compat: ptrace: Add compat_arch_ptrace implement
> >> >   riscv: compat: Add COMPAT Kbuild skeletal support
> >> >
> >> >  arch/arm64/Kconfig                            |   4 -
> >> >  arch/arm64/include/asm/compat.h               |  93 +------
> >> >  arch/arm64/include/asm/unistd.h               |   1 +
> >> >  arch/mips/Kconfig                             |   5 -
> >> >  arch/mips/include/asm/compat.h                |  41 +--
> >> >  arch/mips/include/asm/unistd.h                |   2 +
> >> >  arch/mips/include/uapi/asm/fcntl.h            |  30 +--
> >> >  arch/parisc/Kconfig                           |   4 -
> >> >  arch/parisc/include/asm/compat.h              |  45 +---
> >> >  arch/parisc/include/asm/unistd.h              |   1 +
> >> >  arch/powerpc/Kconfig                          |   5 -
> >> >  arch/powerpc/include/asm/compat.h             |  50 +---
> >> >  arch/powerpc/include/asm/unistd.h             |   1 +
> >> >  arch/riscv/Kconfig                            |  19 ++
> >> >  arch/riscv/Makefile                           |   9 +
> >> >  arch/riscv/configs/rv32_defconfig             | 135 ----------
> >> >  arch/riscv/include/asm/compat.h               | 129 ++++++++++
> >> >  arch/riscv/include/asm/csr.h                  |   7 +
> >> >  arch/riscv/include/asm/elf.h                  |  50 +++-
> >> >  arch/riscv/include/asm/mmu.h                  |   1 +
> >> >  arch/riscv/include/asm/pgtable.h              |  13 +-
> >> >  arch/riscv/include/asm/processor.h            |   6 +-
> >> >  arch/riscv/include/asm/syscall.h              |   1 +
> >> >  arch/riscv/include/asm/thread_info.h          |   1 +
> >> >  arch/riscv/include/asm/unistd.h               |  11 +
> >> >  arch/riscv/include/asm/vdso.h                 |   9 +
> >> >  arch/riscv/include/uapi/asm/unistd.h          |   2 +-
> >> >  arch/riscv/kernel/Makefile                    |   3 +
> >> >  arch/riscv/kernel/compat_signal.c             | 243 ++++++++++++++++++
> >> >  arch/riscv/kernel/compat_syscall_table.c      |  19 ++
> >> >  arch/riscv/kernel/compat_vdso/.gitignore      |   2 +
> >> >  arch/riscv/kernel/compat_vdso/Makefile        |  78 ++++++
> >> >  arch/riscv/kernel/compat_vdso/compat_vdso.S   |   8 +
> >> >  .../kernel/compat_vdso/compat_vdso.lds.S      |   3 +
> >> >  arch/riscv/kernel/compat_vdso/flush_icache.S  |   3 +
> >> >  .../compat_vdso/gen_compat_vdso_offsets.sh    |   5 +
> >> >  arch/riscv/kernel/compat_vdso/getcpu.S        |   3 +
> >> >  arch/riscv/kernel/compat_vdso/note.S          |   3 +
> >> >  arch/riscv/kernel/compat_vdso/rt_sigreturn.S  |   3 +
> >> >  arch/riscv/kernel/entry.S                     |  18 +-
> >> >  arch/riscv/kernel/process.c                   |  37 +++
> >> >  arch/riscv/kernel/ptrace.c                    |  87 ++++++-
> >> >  arch/riscv/kernel/signal.c                    |  13 +-
> >> >  arch/riscv/kernel/sys_riscv.c                 |   6 +-
> >> >  arch/riscv/kernel/vdso.c                      | 105 +++++---
> >> >  arch/riscv/kernel/vdso/vdso.S                 |   6 +-
> >> >  arch/s390/Kconfig                             |   3 -
> >> >  arch/s390/include/asm/compat.h                |  99 +------
> >> >  arch/s390/include/asm/unistd.h                |   1 +
> >> >  arch/sparc/Kconfig                            |   5 -
> >> >  arch/sparc/include/asm/compat.h               |  61 ++---
> >> >  arch/sparc/include/asm/unistd.h               |   1 +
> >> >  arch/x86/Kconfig                              |   4 -
> >> >  arch/x86/include/asm/compat.h                 | 104 ++------
> >> >  arch/x86/include/asm/unistd.h                 |   1 +
> >> >  fs/open.c                                     |  24 ++
> >> >  fs/read_write.c                               |  16 ++
> >> >  fs/stat.c                                     |   2 +-
> >> >  fs/sync.c                                     |   9 +
> >> >  include/asm-generic/compat.h                  | 113 ++++++++
> >> >  include/linux/compat.h                        |  68 +++++
> >> >  include/uapi/asm-generic/fcntl.h              |  23 +-
> >> >  include/uapi/asm-generic/unistd.h             |   4 +-
> >> >  init/Kconfig                                  |   4 +
> >> >  mm/fadvise.c                                  |  11 +
> >> >  mm/readahead.c                                |   7 +
> >> >  tools/include/uapi/asm-generic/fcntl.h        |  21 +-
> >> >  tools/include/uapi/asm-generic/unistd.h       |   4 +-
> >> >  68 files changed, 1207 insertions(+), 698 deletions(-)
> >> >  delete mode 100644 arch/riscv/configs/rv32_defconfig
> >> >  create mode 100644 arch/riscv/include/asm/compat.h
> >> >  create mode 100644 arch/riscv/kernel/compat_signal.c
> >> >  create mode 100644 arch/riscv/kernel/compat_syscall_table.c
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/.gitignore
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/Makefile
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/compat_vdso.S
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/compat_vdso.lds.S
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/flush_icache.S
> >> >  create mode 100755 arch/riscv/kernel/compat_vdso/gen_compat_vdso_offsets.sh
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/getcpu.S
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/note.S
> >> >  create mode 100644 arch/riscv/kernel/compat_vdso/rt_sigreturn.S
> >> >
> >> > --
> >> > 2.25.1
> >> >
> >>
> >>
> >> --
> >> Best Regards
> >>  Guo Ren
> >>
> >> ML: https://lore.kernel.org/linux-csky/
> >
> >
> >
> > --
> > Best Regards
> >  Guo Ren
> >
> > ML: https://lore.kernel.org/linux-csky/



--
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/




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