linux-toradex.git/arch/csky, branch v5.0 Linux kernel for Apalis and Colibri modules csky: Fixup dead loop in show_stack 2019-02-13T01:48:14+00:00 Guo Ren ren_guo@c-sky.com 2019-01-31T06:34:37+00:00 131aee8b9807bc98379fa5a0270389dbc7dcec90 When STACKTRACE is enabled, we must pass fp as stack for unwind, otherwise random value in stack will casue a dead loop. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reported-by: Lu Baoquan <lu.baoquan@intellif.com> 
When STACKTRACE is enabled, we must pass fp as stack for unwind,
otherwise random value in stack will casue a dead loop.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Lu Baoquan <lu.baoquan@intellif.com>
csky: Fixup io-range page attribute for mmap("/dev/mem") 2019-02-13T01:48:14+00:00 Guo Ren ren_guo@c-sky.com 2019-01-30T12:13:11+00:00 76d21d186a65523b08ea5f70302e2c29ee8f6a8d Some user space drivers need accessing IO address and IO remap need SO(strong order) page-attribute to make IO operation correct. So we need add SO-page-attr for all non-memory address. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reported-by: Fan Xiaodong <xiaodong.fan@boyahualu.com> 
Some user space drivers need accessing IO address and IO remap need
SO(strong order) page-attribute to make IO operation correct. So we
need add SO-page-attr for all non-memory address.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Fan Xiaodong <xiaodong.fan@boyahualu.com>
csky: coding convention: Use task_stack_page 2019-02-13T01:48:14+00:00 Guo Ren ren_guo@c-sky.com 2019-01-24T14:43:58+00:00 0f231dcfc664aaafa75a006ee10e55f3ae0c9b3c Use task_stack_page instead of p->stack to get stack. Follow the coding convention style. Also for init_stack, the same with other archs. Signed-off-by: Guo Ren <ren_guo@c-sky.com> 
Use task_stack_page instead of p->stack to get stack. Follow the coding
convention style. Also for init_stack, the same with other archs.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
csky: Fixup wrong pt_regs size 2019-02-13T01:48:14+00:00 Guo Ren ren_guo@c-sky.com 2019-01-24T14:16:31+00:00 9216cd7231c12a8c391bb2c904d13695398d3453 The bug is from commit 2054f4af1957 ("csky: bugfix gdb coredump error.") We change the ELF_NGREG to ELF_NGREG - 2 to fit gdb&gcc define, but forgot modify ptrace regset. Now coredump use ELF_NRGEG to parse GPRs and ptrace use pt_regs_regset, so there are two different reg_sets for userspace. Signed-off-by: Guo Ren <ren_guo@c-sky.com> 
The bug is from commit 2054f4af1957 ("csky: bugfix gdb coredump error.")

We change the ELF_NGREG to ELF_NGREG - 2 to fit gdb&gcc define, but forgot
modify ptrace regset.
Now coredump use ELF_NRGEG to parse GPRs and ptrace use pt_regs_regset, so
there are two different reg_sets for userspace.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
csky: Fixup _PAGE_GLOBAL bit for 610 tlb entry 2019-02-13T01:48:14+00:00 Guo Ren ren_guo@c-sky.com 2019-01-11T04:48:25+00:00 62eebea655d4be5a20fd563abfd7656724cdcd00 C-SKY CPU 8xx's _PAGE_GLOBAL is BIT(0), but 610's _PAGE_GLOBAL is BIT(6). Use _PAGE_GLOBAL macro instead of bad magic number. Signed-off-by: Guo Ren <ren_guo@c-sky.com> 
C-SKY CPU 8xx's _PAGE_GLOBAL is BIT(0), but 610's _PAGE_GLOBAL is
BIT(6). Use _PAGE_GLOBAL macro instead of bad magic number.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
csky: fixup compile error with CPU 810. 2019-01-10T12:37:37+00:00 Guo Ren ren_guo@c-sky.com 2019-01-10T12:28:39+00:00 70c25259537c073584eb906865307687275b527f This bug is from commit f553aa1c13cb ("csky: fixup relocation error with 807 & 860"). I forgot to compile with 810 for that patch. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
This bug is from commit f553aa1c13cb ("csky: fixup relocation error with
807 & 860").

I forgot to compile with 810 for that patch.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
csky: fixup compile error with pte_alloc 2019-01-08T16:18:33+00:00 Guo Ren ren_guo@c-sky.com 2019-01-08T12:31:43+00:00 2a60aa14a9a0333b3eef58150bc1ef654f7321ef Commit: 4cf58924951e remove the address argument of pte_alloc without modify csky related code. linux-5.0-rc1 compile failed with csky. Remove the unnecessary address testing in pte_alloc(). Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Joel Fernandes (Google) <joel@joelfernandes.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> 
Commit: 4cf58924951e remove the address argument of pte_alloc without
modify csky related code. linux-5.0-rc1 compile failed with csky.

Remove the unnecessary address testing in pte_alloc().

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
csky: fixup CACHEV1 store instruction fast retire 2019-01-08T15:42:42+00:00 Guo Ren ren_guo@c-sky.com 2019-01-08T12:17:49+00:00 96354ad79e2e59f9d620669c8e1ac2452440c260 For I/O access, 810/807 store instruction fast retire will cause wrong primitive. For example: stw (clear interrupt source) stw (unmask interrupt controller) enable interrupt stw is fast retire instruction. When PC is run at enable interrupt stage, the clear interrupt source hasn't finished. It will cause another wrong irq-enter. So use mb() to prevent above. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Lu Baoquan <lu.baoquan@intellif.com> 
For I/O access, 810/807 store instruction fast retire will cause wrong
primitive. For example:

	stw (clear interrupt source)
	stw (unmask interrupt controller)
	enable interrupt

stw is fast retire instruction. When PC is run at enable interrupt
stage, the clear interrupt source hasn't finished. It will cause another
wrong irq-enter.

So use mb() to prevent above.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Lu Baoquan <lu.baoquan@intellif.com>
csky: fixup relocation error with 807 & 860 2019-01-08T11:52:22+00:00 Guo Ren ren_guo@c-sky.com 2019-01-08T11:52:22+00:00 f553aa1c13cbc29aaf420349a28fc33ca98440e5 810 doesn't support jsri instruction and csky-as will leave jsri + nop for relocation. Module-probe need replace them with lrw + jsr. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Hui Kai <huikai@acoinfo.com> 
810 doesn't support jsri instruction and csky-as will leave
jsri + nop for relocation. Module-probe need replace them with
lrw + jsr.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Hui Kai <huikai@acoinfo.com>
arch: remove redundant UAPI generic-y defines 2019-01-06T01:22:15+00:00 Masahiro Yamada yamada.masahiro@socionext.com 2019-01-03T01:10:39+00:00 d6e4b3e326d8b44675b9e19534347d97073826aa Now that Kbuild automatically creates asm-generic wrappers for missing mandatory headers, it is redundant to list the same headers in generic-y and mandatory-y. Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> 
Now that Kbuild automatically creates asm-generic wrappers for missing
mandatory headers, it is redundant to list the same headers in
generic-y and mandatory-y.

Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>