Commit Graph

287 Commits

Author SHA1 Message Date
Greentime Hu
81560e011a nds32: Fix building error of crypto/xor.c by adding xor.h
When I compiled with allmodconfig, it caused this building failed.
crypto/xor.c:25:21: fatal error: asm/xor.h: No such file or directory
 #include <asm/xor.h>
                     ^
compilation terminated.

Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-05-23 13:26:20 +08:00
Greentime Hu
6ca4b262db nds32: Fix building error when CONFIG_FREEZE is enabled.
To include kernel/Kconfig.freezer to make sure the dependency between
CONFIG_CGROUP_FREEZER and CONFIG_FREEZER

It will cause building error when I make allmodconfig.

kernel/cgroup/freezer.c: In function 'freezer_css_online':
kernel/cgroup/freezer.c:116:15: error: 'system_freezing_cnt' undeclared (first use in this function)
   atomic_inc(&system_freezing_cnt);
               ^~~~~~~~~~~~~~~~~~~
kernel/cgroup/freezer.c:116:15: note: each undeclared identifier is reported only once for each function it appears in
kernel/cgroup/freezer.c: In function 'freezer_css_offline':
kernel/cgroup/freezer.c:137:15: error: 'system_freezing_cnt' undeclared (first use in this function)
   atomic_dec(&system_freezing_cnt);
               ^~~~~~~~~~~~~~~~~~~
kernel/cgroup/freezer.c: In function 'freezer_attach':
kernel/cgroup/freezer.c:181:4: error: implicit declaration of function 'freeze_task' [-Werror=implicit-function-declaration]
    freeze_task(task);
    ^~~~~~~~~~~
kernel/cgroup/freezer.c: In function 'freezer_apply_state':
kernel/cgroup/freezer.c:360:16: error: 'system_freezing_cnt' undeclared (first use in this function)
    atomic_inc(&system_freezing_cnt);
                ^~~~~~~~~~~~~~~~~~~

Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-05-23 13:26:20 +08:00
Greentime Hu
aeaa7af744 nds32: lib: To use generic lib instead of libgcc to prevent the symbol undefined issue.
We can use the generic lib to fix these error because the symbol of
libgcc in toolchain is not exported.

ERROR: "__ucmpdi2" [fs/xfs/xfs.ko] undefined!
ERROR: "__ashrdi3" [fs/xfs/xfs.ko] undefined!
ERROR: "__lshrdi3" [fs/xfs/xfs.ko] undefined!
ERROR: "__ashldi3" [fs/ntfs/ntfs.ko] undefined!
...

Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-05-23 13:26:20 +08:00
Eric W. Biederman
d808e918ed signal/nds32: Use force_sig_fault where appropriate
Filling in struct siginfo before calling force_sig_info a tedious and
error prone process, where once in a great while the wrong fields
are filled out, and siginfo has been inconsistently cleared.

Simplify this process by using the helper force_sig_fault.  Which
takes as a parameters all of the information it needs, ensures
all of the fiddly bits of filling in struct siginfo are done properly
and then calls force_sig_info.

In short about a 5 line reduction in code for every time force_sig_info
is called, which makes the calling function clearer.

Cc: Greentime Hu <green.hu@gmail.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Acked-by: Vincent Chen <deanbo422@gmail.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-25 10:42:47 -05:00
Eric W. Biederman
3eb0f5193b signal: Ensure every siginfo we send has all bits initialized
Call clear_siginfo to ensure every stack allocated siginfo is properly
initialized before being passed to the signal sending functions.

Note: It is not safe to depend on C initializers to initialize struct
siginfo on the stack because C is allowed to skip holes when
initializing a structure.

The initialization of struct siginfo in tracehook_report_syscall_exit
was moved from the helper user_single_step_siginfo into
tracehook_report_syscall_exit itself, to make it clear that the local
variable siginfo gets fully initialized.

In a few cases the scope of struct siginfo has been reduced to make it
clear that siginfo siginfo is not used on other paths in the function
in which it is declared.

Instances of using memset to initialize siginfo have been replaced
with calls clear_siginfo for clarity.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-25 10:40:51 -05:00
Eric W. Biederman
f6ed1ecad5 signal/nds32: Use force_sig(SIGILL) in do_revisn
As originally committed do_revisn would deliver a siginfo for SIGILL
with an si_code composed of random stack contents.  That makes no
sense and is not something userspace can depend on.  So simplify
the code and just use "force_sig(SIG_ILL, current)" instead.

Fixes: 2923f5ea77 ("nds32: Exception handling")
Cc: Vincent Chen <vincentc@andestech.com>
Cc: Greentime Hu <greentime@andestech.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-25 10:40:33 -05:00
Eric W. Biederman
be5c2ff06c signal/nds32: Use force_sig in unhandled_interruption and unhandled_exceptions
Neither unhandled_interrupt nor unhandled_exceptions fills in any of the
siginfo fields whend sending SIGKILL.  Further because it is SIGKILL
even if all of the fields were filled out appropriately it would be impossible
for the process to read any of the siginfo fields.  So simplfy things and
just use force_sig instead of force_sig_info.

Fixes: 2923f5ea77 ("nds32: Exception handling")
Cc: Vincent Chen <vincentc@andestech.com>
Cc: Greentime Hu <greentime@andestech.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-25 10:39:49 -05:00
Arnd Bergmann
2b5a9a37e9 time: Add an asm-generic/compat.h file
We have a couple of files that try to include asm/compat.h on
architectures where this is available. Those should generally use the
higher-level linux/compat.h file, but that in turn fails to include
asm/compat.h when CONFIG_COMPAT is disabled, unless we can provide
that header on all architectures.

This adds the asm/compat.h for all remaining architectures to
simplify the dependencies.

Architectures that are getting removed in linux-4.17 are not changed
here, to avoid needless conflicts with the removal patches. Those
architectures are broken by this patch, but we have already shown
that they have no users.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-04-19 13:28:51 +02:00
Matthew Wilcox
b93b016313 page cache: use xa_lock
Remove the address_space ->tree_lock and use the xa_lock newly added to
the radix_tree_root.  Rename the address_space ->page_tree to ->i_pages,
since we don't really care that it's a tree.

[willy@infradead.org: fix nds32, fs/dax.c]
  Link: http://lkml.kernel.org/r/20180406145415.GB20605@bombadil.infradead.orgLink: http://lkml.kernel.org/r/20180313132639.17387-9-willy@infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-11 10:28:39 -07:00
Greentime Hu
6fc61ee694 nds32: To use the generic dump_stack()
Use the generic dump_stack() instead of nds32 one because they are doing
the same thing.

Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-03-16 15:45:23 +08:00
Greentime Hu
e115807657 nds32: fix building failed if using elf toolchain.
OUTPUT_FORMAT is not necessary here and the elf toolchain doesn't
support these formats. Since kernel should be built pass with elf
or Linux toolchain. This can be removed from vdso.ld.S

These are the built failed messages.
  VDSOL   arch/nds32/kernel/vdso/vdso.so.dbg
  /home/users/greentime/tmp/nds32le-elf-newlib-v3-upstream-b224/bin/../lib/gcc/nds32le-elf/8.0.1/../../../../nds32le-elf/bin/ld:
  target elf32-nds32le-linux not found
  collect2: error: ld returned 1 exit status
  make[1]: *** [arch/nds32/kernel/vdso/vdso.so.dbg] Error 1
  make: *** [vdso_prepare] Error 2

Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-03-16 15:45:22 +08:00
Greentime Hu
d78a62fb34 nds32: fix building failed if using older version gcc.
It will be built failed because these options are not supported by older
version gcc.

Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-03-16 15:45:20 +08:00
Greentime Hu
e71ea3bada nds32: Build infrastructure
This patch adds Makefile, Kconfig and vmlinux.lds.S files required for building
an nds32 kernel.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:35 +08:00
Greentime Hu
a06d4298d4 nds32: defconfig
This patch adds nds32 defconfig.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:35 +08:00
Greentime Hu
5c86fa7f7f nds32: Miscellaneous header files
This patch introduces some miscellaneous header files.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:34 +08:00
Greentime Hu
beebdeaa1d nds32: Device tree support
This patch adds support for device tree.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:34 +08:00
Greentime Hu
e2f8b5c028 nds32: Generic timers support
This patch adds support for timer.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:34 +08:00
Greentime Hu
c9a4a8da6b nds32: Loadable modules
This patch adds support for loadable modules.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by:  Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:34 +08:00
Greentime Hu
3af6e29254 nds32: L2 cache support
This patch adds L2 cache support.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:34 +08:00
Greentime Hu
e9d0704aa1 nds32: Debugging support
This patch adds ptrace support.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:34 +08:00
Greentime Hu
ace02e2bad nds32: Library functions
This patch add support for various library functions.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:33 +08:00
Greentime Hu
7ecbac743a nds32: Signal handling support
This patch adds support for signal handling.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
2018-02-22 10:44:33 +08:00
Greentime Hu
eefacd1dfe nds32: VDSO support
This patch adds VDSO support. The VDSO code is currently used for
sys_rt_sigreturn() and optimised gettimeofday() (using the SoC timer counter).

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:33 +08:00
Greentime Hu
1932fbe36e nds32: System calls handling
This patch adds support for system calls.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:33 +08:00
Greentime Hu
3172c605eb nds32: ELF definitions
This patch adds definitions for the ELF format, relocation types, vdso
locations and EXEC_PAGESIZE.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:33 +08:00
Greentime Hu
80081b3391 nds32: DMA mapping API
This patch adds support for the DMA mapping API. It uses dma_map_ops for
flexibility.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:32 +08:00
Greentime Hu
4a64f68dbd nds32: Device specific operations
This patch introduces ioremap implementations.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:32 +08:00
Greentime Hu
484367b6a9 nds32: Atomic operations
This patch includes the atomic and futex operations. Many atomic operations use
the load-lock word(llw) and store-condition word(scw) operations.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:32 +08:00
Greentime Hu
f13c34b906 nds32: IRQ handling
This patch includes irq related functions and irqchip_init().

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:32 +08:00
Greentime Hu
a15e9ffa87 nds32: Process management
This patch includes copy_thread(), start_thread() implementation and cpu_context
structure definition. nds32 uses $r25 to get current task_struct.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:32 +08:00
Greentime Hu
7de9cf4740 nds32: Cache and TLB routines
This patch contains cache and TLB maintenance functions.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:32 +08:00
Greentime Hu
664eec400b nds32: MMU fault handling and page table management
This patch includes page fault handler, mmap and fixup implementations.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:31 +08:00
Greentime Hu
59fd53cd5c nds32: MMU initialization
This patch includes memory initializations and highmem supporting.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:31 +08:00
Greentime Hu
2e1aecb970 nds32: MMU definitions
This patch includes virtual memory layout, PHYS_OFFSET is defined as 0x0. It
also includes the 4KB/8KB page size configurations and pte operations.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:31 +08:00
Greentime Hu
2923f5ea77 nds32: Exception handling
This patch includes the exception/interrupt entries, pt_reg structure and
related accessors.

/* Unaligned accessing handling*/
Andes processors cannot load/store information which is not naturally
aligned on the bus, i.e., loading a 4 byte data whose start address must
be divisible by 4. If unaligned data accessing is happened, data
unaligned exception will be triggered and user will get SIGSEGV or
kernel oops according to the unaligned address. In order to make user be
able to load/store data from an unaligned address, software load/store
emulation is implemented in arch/nds32/mm/alignment.c to address data
unaligned exception.

Unaligned accessing handling is disabled by default because it is not a
normal case. User can enable this feature by following steps.

A. Compile time:
    1. Enable kernel config CONFIG_ALIGNMENT_TRAP
B. Run time:
    1. Enter /proc/sys/nds32/unaligned_acess folder
    2. Write 1 to file enable_mode to enable unaligned accessing
       handling. User can disable it by writing 0 to this file.
    3. Write 1 to file debug to show which unaligned address is under
       processing. User can disable it by writing 0 to this file.

However, unaligned accessing handler cannot work if this unaligned
address is not accessible such as protection violation. On this
condition, the default behaviors for addressing data unaligned exception
still happen

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:31 +08:00
Greentime Hu
001d953ede nds32: Kernel booting and initialization
This patch includes the kernel startup code. It can get dtb pointer
passed from bootloader. It will create a temp mapping by tlb
instructions at beginning and goto start_kernel.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:31 +08:00
Greentime Hu
e1d82de681 nds32: Assembly macros and definitions
This patch includes assembly macros, bit field definitions used in .S
files across arch/nds32/.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-02-22 10:44:31 +08:00