Skip to content

L
linux
Switch branch/tag
  1. 30 Oct, 2021 6 commits
  3. 19 Oct, 2021 2 commits
  5. 16 Oct, 2021 27 commits
  7. 15 Oct, 2021 5 commits
    • Guenter Roeck's avatar
      csky: Make HAVE_TCM depend on !COMPILE_TEST · e21e52ad
      Guenter Roeck authored 
      Building csky:allmodconfig results in the following build errors.

arch/csky/mm/tcm.c:9:2: error:
		#error "You should define ITCM_RAM_BASE"
    9 | #error "You should define ITCM_RAM_BASE"
      |  ^~~~~
arch/csky/mm/tcm.c:14:2: error:
		#error "You should define DTCM_RAM_BASE"
   14 | #error "You should define DTCM_RAM_BASE"
      |  ^~~~~
arch/csky/mm/tcm.c:18:2: error:
		#error "You should define correct DTCM_RAM_BASE"
   18 | #error "You should define correct DTCM_RAM_BASE"

This is seen with compile tests since those enable HAVE_TCM,
but do not provide useful default values for ITCM_RAM_BASE or
DTCM_RAM_BASE. Disable HAVE_TCM for commpile tests to avoid
the error.
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGuo Ren <guoren@kernel.org>
      e21e52ad
    • Guenter Roeck's avatar
      csky: bitops: Remove duplicate __clear_bit define · fb5d69a5
      Guenter Roeck authored 
      Building csky:allmodconfig results in the following build error.

In file included from ./include/linux/bitops.h:33,
                 from ./include/linux/log2.h:12,
                 from kernel/bounds.c:13:
./arch/csky/include/asm/bitops.h:77: error: "__clear_bit" redefined

Since commit 9248e52f ("locking/atomic: simplify non-atomic wrappers"),
__clear_bit is defined in include/asm-generic/bitops/non-atomic.h,
and the define in the csky include file is no longer necessary or useful.
Remove it.

Fixes: 9248e52f ("locking/atomic: simplify non-atomic wrappers")
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGuo Ren <guoren@kernel.org>
      fb5d69a5
    • Guenter Roeck's avatar
      csky: Select ARCH_WANT_FRAME_POINTERS only if compiler supports it · aeba0b84
      Guenter Roeck authored 
      Compiling csky:allmodconfig with an upstream C compiler results
in the following error.

csky-linux-gcc: error:
	unrecognized command-line option '-mbacktrace';
	did you mean '-fbacktrace'?

Select ARCH_WANT_FRAME_POINTERS only if gcc supports it to
avoid the error.
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGuo Ren <guoren@kernel.org>
      aeba0b84
    • Guo Ren's avatar
      csky: Fixup regs.sr broken in ptrace · af89ebaa
      Guo Ren authored 
      gpr_get() return the entire pt_regs (include sr) to userspace, if we
don't restore the C bit in gpr_set, it may break the ALU result in
that context. So the C flag bit is part of gpr context, that's why
riscv totally remove the C bit in the ISA. That makes sr reg clear
from userspace to supervisor privilege.
Signed-off-by: default avatarGuo Ren <guoren@linux.alibaba.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
      af89ebaa
    • Al Viro's avatar
      csky: don't let sigreturn play with priveleged bits of status register · fbd63c08
      Al Viro authored 
      csky restore_sigcontext() blindly overwrites regs->sr with the value
it finds in sigcontext.  Attacker can store whatever they want in there,
which includes things like S-bit.  Userland shouldn't be able to set
that, or anything other than C flag (bit 0).

Do the same thing other architectures with protected bits in flags
register do - preserve everything that shouldn't be settable in
user mode, picking the rest from the value saved is sigcontext.
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarGuo Ren <guoren@kernel.org>
Cc: stable@vger.kernel.org
      fbd63c08
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7