[PATCH seccomp v2 0/8] seccomp: add bitmap cache support on remaining arches and report cache in procfs

[YiFei Zhu]

From: YiFei Zhu <yifeifz2 at illinois.edu>

This patch series enables bitmap cache for the remaining arches with
SECCOMP_FILTER, other than MIPS.

I was unable to find any of the arches having subarch-specific NR_syscalls
macros, so generic NR_syscalls is used. SH's syscall_get_arch seems to
only have the 32-bit subarch implementation. I'm not sure if this is
expected.

This series has not been tested; I have not built all the cross compilers
necessary to build test, let alone run the kernel or benchmark the
performance, so help on making sure the bitmap cache works as expected
(selftests/seccomp/{seccomp_benchmark,seccomp_bpf}) would be appreciated.
The series applies on top of Kees's for-next/seccomp branch.

v1 -> v2:
* ppc, sh: s/__SECCOMP_ARCH_LE_BIT/__SECCOMP_ARCH_LE/
* ppc: add "le" suffix to arch name when the arch is little endian.
* ppc: add explanation of why __LITTLE_ENDIAN__ is used to commit message.

YiFei Zhu (8):
  csky: Enable seccomp architecture tracking
  parisc: Enable seccomp architecture tracking
  powerpc: Enable seccomp architecture tracking
  riscv: Enable seccomp architecture tracking
  s390: Enable seccomp architecture tracking
  sh: Enable seccomp architecture tracking
  xtensa: Enable seccomp architecture tracking
  seccomp/cache: Report cache data through /proc/pid/seccomp_cache

 arch/Kconfig                       | 15 ++++++++
 arch/csky/include/asm/Kbuild       |  1 -
 arch/csky/include/asm/seccomp.h    | 11 ++++++
 arch/parisc/include/asm/Kbuild     |  1 -
 arch/parisc/include/asm/seccomp.h  | 22 +++++++++++
 arch/powerpc/include/asm/seccomp.h | 23 ++++++++++++
 arch/riscv/include/asm/seccomp.h   | 10 +++++
 arch/s390/include/asm/seccomp.h    |  9 +++++
 arch/sh/include/asm/seccomp.h      | 10 +++++
 arch/xtensa/include/asm/Kbuild     |  1 -
 arch/xtensa/include/asm/seccomp.h  | 11 ++++++
 fs/proc/base.c                     |  6 +++
 include/linux/seccomp.h            |  7 ++++
 kernel/seccomp.c                   | 59 ++++++++++++++++++++++++++++++
 14 files changed, 183 insertions(+), 3 deletions(-)
 create mode 100644 arch/csky/include/asm/seccomp.h
 create mode 100644 arch/parisc/include/asm/seccomp.h
 create mode 100644 arch/xtensa/include/asm/seccomp.h


base-commit: 38c37e8fd3d2590c4234d8cfbc22158362f0eb04
--
2.29.2