[PATCH V9 19/20] riscv: compat: ptrace: Add compat_arch_ptrace implement

From: Guo Ren Now, you can use native gdb on riscv64 for rv32 app debugging. $ uname -a Linux buildroot 5.16.0-rc4-00036-gbef6b82fdf23-dirty #53 SMP Mon Dec 20 23:06:53 CST 2021 riscv64 GNU/Linux $ cat /proc/cpuinfo processor : 0 hart: 0 isa : rv64imafdcsuh mmu

[PATCH V9 20/20] riscv: compat: Add COMPAT Kbuild skeletal support

From: Guo Ren Adds initial skeletal COMPAT Kbuild (Running 32bit U-mode on 64bit S-mode) support. - Setup kconfig & dummy functions for compiling. - Implement compat_start_thread by the way. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: Heiko Stuebner

[PATCH V10 00/20] riscv: Add COMPAT mode support for rv64

ice 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 [0.00] Linux version 5.16.0-rc6-00017-g750f87086bdd-dirty

[PATCH V10 01/20] uapi: simplify __ARCH_FLOCK{,64}_PAD a little

From: Christoph Hellwig Don't bother to define the symbols empty, just don't use them. That makes the intent a little more clear. Remove the unused HAVE_ARCH_STRUCT_FLOCK64 define and merge the 32-bit mips struct flock into the generic one. Add a new __ARCH_FLOCK_EXTRA_SYSID macro following the

[PATCH V10 02/20] uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h

From: Christoph Hellwig The F_GETLK64/F_SETLK64/F_SETLKW64 fcntl opcodes are only implemented for the 32-bit syscall APIs, but are also needed for compat handling on 64-bit kernels. Consolidate them in unistd.h instead of definining the internal compat definitions in compat.h, which is rather er

[PATCH V10 03/20] compat: consolidate the compat_flock{, 64} definition

From: Christoph Hellwig Provide a single common definition for the compat_flock and compat_flock64 structures using the same tricks as for the native variants. Another extra define is added for the packing required on x86. Signed-off-by: Christoph Hellwig Signed-off-by: Guo Ren Reviewed-by: A

[PATCH V10 04/20] kconfig: Add SYSVIPC_COMPAT for all architectures

From: Guo Ren The existing per-arch definitions are pretty much historic cruft. Move SYSVIPC_COMPAT into init/Kconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Acked-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner Cc: Palmer Dabbelt --- arch/arm64/Kconfig

[PATCH V10 05/20] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT

From: Guo Ren RISC-V doesn't neeed compat_stat, so using __ARCH_WANT_COMPAT_STAT to exclude unnecessary SYSCALL functions. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner Cc: Palmer Dabbelt --- arch/arm64/in

[PATCH V10 06/20] asm-generic: compat: Cleanup duplicate definitions

From: Guo Ren There are 7 64bit architectures that support Linux COMPAT mode to run 32bit applications. A lot of definitions are duplicate: - COMPAT_USER_HZ - COMPAT_RLIM_INFINITY - COMPAT_OFF_T_MAX - __compat_uid_t, __compat_uid_t - compat_dev_t - compat_ipc_pid_t - struct compat_flock -

[PATCH V10 07/20] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT

From: Guo Ren Make "uapi asm unistd.h" could be used for architectures' COMPAT mode. The __SYSCALL_COMPAT is first used in riscv. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner --- include/uapi/asm-generic/u

[PATCH V10 08/20] riscv: Fixup difference with defconfig

From: Guo Ren Let's follow the origin patch's spirit: The only difference between rv32_defconfig and defconfig is that rv32_defconfig has CONFIG_ARCH_RV32I=y. This is helpful to compare rv64-compat-rv32 v.s. rv32-linux. Fixes: 1b937e8faa87ccfb ("RISC-V: Add separate defconfig for 32bit system

[PATCH V10 09/20] riscv: compat: Add basic compat data type implementation

From: Guo Ren Implement riscv asm/compat.h for struct compat_xxx, is_compat_task, compat_user_regset, regset convert. The rv64 compat.h has inherited most of the structs from the generic one. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Heiko Stuebner Cc: Arnd Bergmann Cc: Palme

[PATCH V10 10/20] riscv: compat: Support TASK_SIZE for compat mode

From: Guo Ren Make TASK_SIZE from const to dynamic detect TIF_32BIT flag function. Refer to arm64 to implement DEFAULT_MAP_WINDOW_64 for efi-stub. Limit 32-bit compatible process in 0-2GB virtual address range (which is enough for real scenarios), because it could avoid address sign extend probl

[PATCH V10 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation

From: Guo Ren Implement compat sys_call_table and some system call functions: truncate64, ftruncate64, fallocate, pread64, pwrite64, sync_file_range, readahead, fadvise64_64 which need argument translation. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: He

[PATCH V10 12/20] riscv: compat: syscall: Add entry.S implementation

From: Guo Ren Implement the entry of compat_sys_call_table[] in asm. Ref to riscv-privileged spec 4.1.1 Supervisor Status Register (sstatus): BIT[32:33] = UXL[1:0]: - 1:32 - 2:64 - 3:128 Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stuebner

[PATCH V10 13/20] riscv: compat: process: Add UXL_32 support in start_thread

From: Guo Ren If the current task is in COMPAT mode, set SR_UXL_32 in status for returning userspace. We need CONFIG _COMPAT to prevent compiling errors with rv32 defconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Heiko Stuebner Cc: Arnd Bergmann Cc: Palmer Dabbelt --- arc

[PATCH V10 14/20] riscv: compat: Add elf.h implementation

From: Guo Ren Implement necessary type and macro for compat elf. See the code comment for detail. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: Heiko Stuebner --- arch/riscv/include/asm/elf.h | 41 +++- 1 file changed, 40

[PATCH V10 15/20] riscv: compat: Add hw capability check for elf

From: Guo Ren Detect hardware COMPAT (32bit U-mode) capability in rv64. If not support COMPAT mode in hw, compat_elf_check_arch would return false by compat_binfmt_elf.c Add CLASS to enhance (compat_)elf_check_arch to distinguish 32BIT/64BIT elf. Signed-off-by: Guo Ren Signed-off-by: Guo Ren

[PATCH V10 16/20] riscv: compat: vdso: Add COMPAT_VDSO base code implementation

From: Guo Ren There is no vgettimeofday supported in rv32 that makes simple to generate rv32 vdso code which only needs riscv64 compiler. Other architectures need change compiler or -m (machine parameter) to support vdso32 compiling. If rv32 support vgettimeofday (which cause C compile) in future

[PATCH V10 17/20] riscv: compat: vdso: Add setup additional pages implementation

From: Guo Ren Reconstruct __setup_additional_pages() by appending vdso info pointer argument to meet compat_vdso_info requirement. And change vm_special_mapping *dm, *cm initialization into static. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stue

[PATCH V10 18/20] riscv: compat: signal: Add rt_frame implementation

From: Guo Ren Implement compat_setup_rt_frame for sigcontext save & restore. The main process is the same with signal, but the rv32 pt_regs' size is different from rv64's, so we needs convert them. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stue

[PATCH V10 19/20] riscv: compat: ptrace: Add compat_arch_ptrace implement

From: Guo Ren Now, you can use native gdb on riscv64 for rv32 app debugging. $ uname -a Linux buildroot 5.16.0-rc4-00036-gbef6b82fdf23-dirty #53 SMP Mon Dec 20 23:06:53 CST 2021 riscv64 GNU/Linux $ cat /proc/cpuinfo processor : 0 hart: 0 isa : rv64imafdcsuh mmu

[PATCH V10 20/20] riscv: compat: Add COMPAT Kbuild skeletal support

From: Guo Ren Adds initial skeletal COMPAT Kbuild (Running 32bit U-mode on 64bit S-mode) support. - Setup kconfig & dummy functions for compiling. - Implement compat_start_thread by the way. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: Heiko Stuebner

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

ice 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 [0.00] Linux version 5.16.0-rc6-00017-g750f87086bdd-dirty

[PATCH V11 01/20] uapi: simplify __ARCH_FLOCK{,64}_PAD a little

From: Christoph Hellwig Don't bother to define the symbols empty, just don't use them. That makes the intent a little more clear. Remove the unused HAVE_ARCH_STRUCT_FLOCK64 define and merge the 32-bit mips struct flock into the generic one. Add a new __ARCH_FLOCK_EXTRA_SYSID macro following the

[PATCH V11 02/20] uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h

From: Christoph Hellwig The F_GETLK64/F_SETLK64/F_SETLKW64 fcntl opcodes are only implemented for the 32-bit syscall APIs, but are also needed for compat handling on 64-bit kernels. Consolidate them in unistd.h instead of definining the internal compat definitions in compat.h, which is rather er

[PATCH V11 03/20] compat: consolidate the compat_flock{, 64} definition

From: Christoph Hellwig Provide a single common definition for the compat_flock and compat_flock64 structures using the same tricks as for the native variants. Another extra define is added for the packing required on x86. Signed-off-by: Christoph Hellwig Signed-off-by: Guo Ren Reviewed-by: A

[PATCH V11 04/20] arch: Add SYSVIPC_COMPAT for all architectures

From: Guo Ren The existing per-arch definitions are pretty much historic cruft. Move SYSVIPC_COMPAT into init/Kconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Acked-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner Cc: Palmer Dabbelt --- arch/arm64/Kconfig

[PATCH V11 05/20] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT

From: Guo Ren RISC-V doesn't neeed compat_stat, so using __ARCH_WANT_COMPAT_STAT to exclude unnecessary SYSCALL functions. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner Cc: Palmer Dabbelt --- arch/arm64/in

[PATCH V11 06/20] asm-generic: compat: Cleanup duplicate definitions

From: Guo Ren There are 7 64bit architectures that support Linux COMPAT mode to run 32bit applications. A lot of definitions are duplicate: - COMPAT_USER_HZ - COMPAT_RLIM_INFINITY - COMPAT_OFF_T_MAX - __compat_uid_t, __compat_uid_t - compat_dev_t - compat_ipc_pid_t - struct compat_flock -

[PATCH V11 07/20] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT

From: Guo Ren Make "uapi asm unistd.h" could be used for architectures' COMPAT mode. The __SYSCALL_COMPAT is first used in riscv. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner --- include/uapi/asm-generic/u

[PATCH V11 08/20] riscv: Fixup difference with defconfig

From: Guo Ren Let's follow the origin patch's spirit: The only difference between rv32_defconfig and defconfig is that rv32_defconfig has CONFIG_ARCH_RV32I=y. This is helpful to compare rv64-compat-rv32 v.s. rv32-linux. Fixes: 1b937e8faa87ccfb ("RISC-V: Add separate defconfig for 32bit system

[PATCH V11 09/20] riscv: compat: Add basic compat data type implementation

From: Guo Ren Implement riscv asm/compat.h for struct compat_xxx, is_compat_task, compat_user_regset, regset convert. The rv64 compat.h has inherited most of the structs from the generic one. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Heiko Stuebner Cc: Arnd Bergmann Cc: Palme

[PATCH V11 10/20] riscv: compat: Support TASK_SIZE for compat mode

From: Guo Ren Make TASK_SIZE from const to dynamic detect TIF_32BIT flag function. Refer to arm64 to implement DEFAULT_MAP_WINDOW_64 for efi-stub. Limit 32-bit compatible process in 0-2GB virtual address range (which is enough for real scenarios), because it could avoid address sign extend probl

[PATCH V11 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation

From: Guo Ren Implement compat sys_call_table and some system call functions: truncate64, ftruncate64, fallocate, pread64, pwrite64, sync_file_range, readahead, fadvise64_64 which need argument translation. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: He

[PATCH V11 12/20] riscv: compat: syscall: Add entry.S implementation

From: Guo Ren Implement the entry of compat_sys_call_table[] in asm. Ref to riscv-privileged spec 4.1.1 Supervisor Status Register (sstatus): BIT[32:33] = UXL[1:0]: - 1:32 - 2:64 - 3:128 Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stuebner

[PATCH V11 13/20] riscv: compat: process: Add UXL_32 support in start_thread

From: Guo Ren If the current task is in COMPAT mode, set SR_UXL_32 in status for returning userspace. We need CONFIG _COMPAT to prevent compiling errors with rv32 defconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Heiko Stuebner Cc: Arnd Bergmann Cc: Palmer Dabbelt --- arc

[PATCH V11 14/20] riscv: compat: Add elf.h implementation

From: Guo Ren Implement necessary type and macro for compat elf. See the code comment for detail. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: Heiko Stuebner --- arch/riscv/include/asm/elf.h | 41 +++- 1 file changed, 40

[PATCH V11 15/20] riscv: compat: Add hw capability check for elf

From: Guo Ren Detect hardware COMPAT (32bit U-mode) capability in rv64. If not support COMPAT mode in hw, compat_elf_check_arch would return false by compat_binfmt_elf.c Add CLASS to enhance (compat_)elf_check_arch to distinguish 32BIT/64BIT elf. Signed-off-by: Guo Ren Signed-off-by: Guo Ren

[PATCH V11 16/20] riscv: compat: vdso: Add COMPAT_VDSO base code implementation

From: Guo Ren There is no vgettimeofday supported in rv32 that makes simple to generate rv32 vdso code which only needs riscv64 compiler. Other architectures need change compiler or -m (machine parameter) to support vdso32 compiling. If rv32 support vgettimeofday (which cause C compile) in future

[PATCH V11 17/20] riscv: compat: vdso: Add setup additional pages implementation

From: Guo Ren Reconstruct __setup_additional_pages() by appending vdso info pointer argument to meet compat_vdso_info requirement. And change vm_special_mapping *dm, *cm initialization into static. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stue

[PATCH V11 18/20] riscv: compat: signal: Add rt_frame implementation

From: Guo Ren Implement compat_setup_rt_frame for sigcontext save & restore. The main process is the same with signal, but the rv32 pt_regs' size is different from rv64's, so we needs convert them. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stue

[PATCH V11 19/20] riscv: compat: ptrace: Add compat_arch_ptrace implement

From: Guo Ren Now, you can use native gdb on riscv64 for rv32 app debugging. $ uname -a Linux buildroot 5.16.0-rc4-00036-gbef6b82fdf23-dirty #53 SMP Mon Dec 20 23:06:53 CST 2021 riscv64 GNU/Linux $ cat /proc/cpuinfo processor : 0 hart: 0 isa : rv64imafdcsuh mmu

[PATCH V11 20/20] riscv: compat: Add COMPAT Kbuild skeletal support

From: Guo Ren Adds initial skeletal COMPAT Kbuild (Running 32bit U-mode on 64bit S-mode) support. - Setup kconfig & dummy functions for compiling. - Implement compat_start_thread by the way. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: Heiko Stuebner

[PATCH V12 00/20] riscv: Add COMPAT mode support for 64BIT

ice 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 [0.00] Linux version 5.16.0-rc6-00017-g750f87086bdd-dirty

[PATCH V12 01/20] uapi: simplify __ARCH_FLOCK{,64}_PAD a little

From: Christoph Hellwig Don't bother to define the symbols empty, just don't use them. That makes the intent a little more clear. Remove the unused HAVE_ARCH_STRUCT_FLOCK64 define and merge the 32-bit mips struct flock into the generic one. Add a new __ARCH_FLOCK_EXTRA_SYSID macro following the

[PATCH V12 02/20] uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h

From: Christoph Hellwig The F_GETLK64/F_SETLK64/F_SETLKW64 fcntl opcodes are only implemented for the 32-bit syscall APIs, but are also needed for compat handling on 64-bit kernels. Consolidate them in unistd.h instead of definining the internal compat definitions in compat.h, which is rather er

[PATCH V12 03/20] compat: consolidate the compat_flock{, 64} definition

From: Christoph Hellwig Provide a single common definition for the compat_flock and compat_flock64 structures using the same tricks as for the native variants. Another extra define is added for the packing required on x86. Signed-off-by: Christoph Hellwig Signed-off-by: Guo Ren Reviewed-by: A

[PATCH V12 04/20] arch: Add SYSVIPC_COMPAT for all architectures

From: Guo Ren The existing per-arch definitions are pretty much historic cruft. Move SYSVIPC_COMPAT into init/Kconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Acked-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner Acked-by: Helge Deller # parisc Cc: Palmer

[PATCH V12 05/20] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT

From: Guo Ren RISC-V doesn't neeed compat_stat, so using __ARCH_WANT_COMPAT_STAT to exclude unnecessary SYSCALL functions. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner Acked-by: Helge Deller # parisc Cc:

[PATCH V12 06/20] asm-generic: compat: Cleanup duplicate definitions

From: Guo Ren There are 7 64bit architectures that support Linux COMPAT mode to run 32bit applications. A lot of definitions are duplicate: - COMPAT_USER_HZ - COMPAT_RLIM_INFINITY - COMPAT_OFF_T_MAX - __compat_uid_t, __compat_uid_t - compat_dev_t - compat_ipc_pid_t - struct compat_flock -

[PATCH V12 07/20] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT

From: Guo Ren Make "uapi asm unistd.h" could be used for architectures' COMPAT mode. The __SYSCALL_COMPAT is first used in riscv. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner --- include/uapi/asm-generic/u

[PATCH V12 08/20] riscv: Fixup difference with defconfig

From: Guo Ren Let's follow the origin patch's spirit: The only difference between rv32_defconfig and defconfig is that rv32_defconfig has CONFIG_ARCH_RV32I=y. This is helpful to compare rv64-compat-rv32 v.s. rv32-linux. Fixes: 1b937e8faa87ccfb ("RISC-V: Add separate defconfig for 32bit system

[PATCH V12 09/20] riscv: compat: Add basic compat data type implementation

From: Guo Ren Implement riscv asm/compat.h for struct compat_xxx, is_compat_task, compat_user_regset, regset convert. The rv64 compat.h has inherited most of the structs from the generic one. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Heiko Stuebner Cc: Arnd Bergmann Cc: Palme

[PATCH V12 10/20] riscv: compat: Support TASK_SIZE for compat mode

From: Guo Ren Make TASK_SIZE from const to dynamic detect TIF_32BIT flag function. Refer to arm64 to implement DEFAULT_MAP_WINDOW_64 for efi-stub. Limit 32-bit compatible process in 0-2GB virtual address range (which is enough for real scenarios), because it could avoid address sign extend probl

[PATCH V12 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation

From: Guo Ren Implement compat sys_call_table and some system call functions: truncate64, ftruncate64, fallocate, pread64, pwrite64, sync_file_range, readahead, fadvise64_64 which need argument translation. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: He

[PATCH V12 12/20] riscv: compat: syscall: Add entry.S implementation

From: Guo Ren Implement the entry of compat_sys_call_table[] in asm. Ref to riscv-privileged spec 4.1.1 Supervisor Status Register (sstatus): BIT[32:33] = UXL[1:0]: - 1:32 - 2:64 - 3:128 Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stuebner

[PATCH V12 13/20] riscv: compat: process: Add UXL_32 support in start_thread

From: Guo Ren If the current task is in COMPAT mode, set SR_UXL_32 in status for returning userspace. We need CONFIG _COMPAT to prevent compiling errors with rv32 defconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Heiko Stuebner Cc: Arnd Bergmann Cc: Palmer Dabbelt --- arc

[PATCH V12 14/20] riscv: compat: Add elf.h implementation

From: Guo Ren Implement necessary type and macro for compat elf. See the code comment for detail. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: Heiko Stuebner --- arch/riscv/include/asm/elf.h | 41 +++- 1 file changed, 40

[PATCH V12 15/20] riscv: compat: Add hw capability check for elf

From: Guo Ren Detect hardware COMPAT (32bit U-mode) capability in rv64. If not support COMPAT mode in hw, compat_elf_check_arch would return false by compat_binfmt_elf.c Add CLASS to enhance (compat_)elf_check_arch to distinguish 32BIT/64BIT elf. Signed-off-by: Guo Ren Signed-off-by: Guo Ren

[PATCH V12 16/20] riscv: compat: vdso: Add COMPAT_VDSO base code implementation

From: Guo Ren There is no vgettimeofday supported in rv32 that makes simple to generate rv32 vdso code which only needs riscv64 compiler. Other architectures need change compiler or -m (machine parameter) to support vdso32 compiling. If rv32 support vgettimeofday (which cause C compile) in future

[PATCH V12 17/20] riscv: compat: vdso: Add setup additional pages implementation

From: Guo Ren Reconstruct __setup_additional_pages() by appending vdso info pointer argument to meet compat_vdso_info requirement. And change vm_special_mapping *dm, *cm initialization into static. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stue

[PATCH V12 18/20] riscv: compat: signal: Add rt_frame implementation

From: Guo Ren Implement compat_setup_rt_frame for sigcontext save & restore. The main process is the same with signal, but the rv32 pt_regs' size is different from rv64's, so we needs convert them. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Palmer Dabbelt Tested-by: Heiko Stue

[PATCH V12 19/20] riscv: compat: ptrace: Add compat_arch_ptrace implement

From: Guo Ren Now, you can use native gdb on riscv64 for rv32 app debugging. $ uname -a Linux buildroot 5.16.0-rc4-00036-gbef6b82fdf23-dirty #53 SMP Mon Dec 20 23:06:53 CST 2021 riscv64 GNU/Linux $ cat /proc/cpuinfo processor : 0 hart: 0 isa : rv64imafdcsuh mmu

[PATCH V12 20/20] riscv: compat: Add COMPAT Kbuild skeletal support

From: Guo Ren Adds initial skeletal COMPAT Kbuild (Running 32bit U-mode on 64bit S-mode) support. - Setup kconfig & dummy functions for compiling. - Implement compat_start_thread by the way. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann Tested-by: Heiko Stuebner

[PATCH 0/8] sched: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. This would confuse people who are implementing the COMPAT feature for architecture. Guo Ren (8): sched: Remove unused TASK_SIZE_OF sched: x86: Remove unused TASK_SIZE_OF sched: sparc:

[PATCH 1/8] sched: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. This would confuse people who are implementing the COMPAT feature for architecture. Signed-off-by: Guo Ren --- include/linux/sched.h | 4 1 file changed, 4 deletions(-) diff --git a

[PATCH 2/8] sched: x86: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren --- arch/x86/include/asm/page_64_types.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_t

[PATCH 3/8] sched: sparc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren --- arch/sparc/include/asm/processor_64.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/proc

[PATCH 4/8] sched: powerpc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren --- arch/powerpc/include/asm/task_size_64.h | 6 ++ 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/task_size_64.h

[PATCH 5/8] sched: s390: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren --- arch/s390/include/asm/processor.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/s390/include/asm/processor.h b/arch/s390/inc

[PATCH 6/8] sched: parisc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren --- arch/parisc/include/asm/processor.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/parisc/include/asm/processor.h b/arch/pari

[PATCH 7/8] sched: arm64: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren --- arch/arm64/include/asm/processor.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/proce

[PATCH 8/8] sched: mips: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren --- arch/mips/include/asm/processor.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/process

[PATCH V2 0/8] sched: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. This would confuse people who are implementing the COMPAT feature for architecture. Changes in v2: - Add Arnd's comment in main patch - Optimize coding convention with Christophe's advise

[PATCH V2 1/8] sched: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. This would confuse people who are implementing the COMPAT feature for architecture. Here is the comment by Arnd: Looking through the git history, I see commit a06db751c321 ("pagemap: check

[PATCH V2 2/8] sched: x86: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/x86/include/asm/page_64_types.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/include/asm/page_64_types.h b/ar

[PATCH V2 3/8] sched: sparc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/sparc/include/asm/processor_64.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/sparc/include/asm/processor_64.h b

[PATCH V2 4/8] sched: powerpc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/powerpc/include/asm/task_size_64.h | 6 +- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/arch/powerpc/

[PATCH V2 5/8] sched: s390: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/s390/include/asm/processor.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/s390/include/asm/

[PATCH V2 6/8] sched: parisc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/parisc/include/asm/processor.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/parisc/include/

[PATCH V2 7/8] sched: arm64: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/arm64/include/asm/processor.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/include/asm/processor.h b/

[PATCH V2 8/8] sched: mips: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/mips/include/asm/processor.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/mips/include/asm/processor.h b/a

[PATCH V3 0/8] sched: Remove unused TASK_SIZE_OF for all archs

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. This would confuse people who are implementing the COMPAT feature for architecture. Changes in v3: - Fixup Documentation/process/submitting-patches.rst, add sender Signed-off-by. Chang

[PATCH V3 1/8] sched: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. This would confuse people who are implementing the COMPAT feature for architecture. Here is the comment by Arnd: Looking through the git history, I see commit a06db751c321 ("pagemap: check

[PATCH V3 2/8] sched: x86: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/x86/include/asm/page_64_types.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/include/a

[PATCH V3 3/8] sched: sparc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/sparc/include/asm/processor_64.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/sparc/inclu

[PATCH V3 4/8] sched: powerpc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/powerpc/include/asm/task_size_64.h | 6 +- 1 file changed, 1 insertion(+), 5 deletions(-) di

[PATCH V3 5/8] sched: s390: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/s390/include/asm/processor.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git

[PATCH V3 6/8] sched: parisc: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/parisc/include/asm/processor.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --gi

[PATCH V3 7/8] sched: arm64: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/arm64/include/asm/processor.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/inc

[PATCH V3 8/8] sched: mips: Remove unused TASK_SIZE_OF

From: Guo Ren This macro isn't used in Linux sched, now. Delete in include/linux/sched.h and arch's include/asm. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Arnd Bergmann --- arch/mips/include/asm/processor.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/mips/incl

[PATCH V2 00/17] riscv: compat: Add COMPAT mode support for rv64

ycon=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 [0.00] 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 Binuti

[PATCH V2 01/17] kconfig: Add SYSVIPC_COMPAT for all architectures

From: Guo Ren The existing per-arch definitions are pretty much historic cruft. Move SYSVIPC_COMPAT into init/Kconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Arnd Bergmann Cc: Christoph Hellwig --- arch/arm64/Kconfig | 4 arch/mips/Kconfig| 5 - arch/parisc/Kconfig

[PATCH V2 02/17] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT

From: Guo Ren RISC-V doesn't neeed compat_stat, so using __ARCH_WANT_COMPAT_STAT to exclude unnecessary SYSCALL functions. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Arnd Bergmann --- arch/arm64/include/asm/unistd.h | 1 + arch/mips/include/asm/unistd.h| 2 ++ arch/parisc/includ

[PATCH V2 03/17] asm-generic: fcntl: compat: Remove duplicate definitions

From: Guo Ren Remove duplicate F_GETLK64,F_SETLK64,F_SETLKW64 definitions in arch/*/include/asm/compat.h. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Arnd Bergmann --- arch/arm64/include/asm/compat.h | 4 arch/powerpc/include/asm/compat.h | 4 arch/s390/include/asm/compat.h

[PATCH V2 04/17] asm-generic: compat: Cleanup duplicate definitions

From: Guo Ren There are 7 64bit architectures that support Linux COMPAT mode to run 32bit applications. A lot of definitions are duplicate: - COMPAT_USER_HZ - COMPAT_RLIM_INFINITY - COMPAT_OFF_T_MAX - __compat_uid_t, __compat_uid_t - compat_dev_t - compat_ipc_pid_t - struct compat_flock -

[PATCH V2 05/17] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT

From: Guo Ren Make "uapi asm unistd.h" could be used for architectures' COMPAT mode. The __SYSCALL_COMPAT is first used in riscv. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Arnd Bergmann --- include/uapi/asm-generic/unistd.h | 4 ++-- tools/include/uapi/asm-generic/unistd.h | 4

[PATCH V2 06/17] riscv: Fixup difference with defconfig

From: Guo Ren Let's follow the origin patch's spirit: The only difference between rv32_defconfig and defconfig is that rv32_defconfig has CONFIG_ARCH_RV32I=y. This is helpful to compare rv64-compat-rv32 v.s. rv32-linux. Fixes: 1b937e8faa87ccfb ("RISC-V: Add separate defconfig for 32bit system

[PATCH V2 07/17] riscv: compat: Add basic compat date type implementation

From: Guo Ren Implement asm/compat.h for struct compat_xxx, RLIM_INFINITY, OFF_T_MAX, is_compat_task, compat_user_regset, regset convert. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Arnd Bergmann --- arch/riscv/include/asm/compat.h | 132 +++ arch/riscv/inc

<    1   2   3   >