[PATCH 0/9] powerpc/bpf: Various fixes

[Johan Almbladh]

On Fri, Oct 1, 2021 at 11:15 PM Naveen N. Rao
<naveen.n.rao at linux.vnet.ibm.com> wrote:
>
> Various fixes to the eBPF JIT for powerpc, thanks to some new tests
> added by Johan. This series fixes all failures in test_bpf on powerpc64.
> There are still some failures on powerpc32 to be looked into.

Great work! I have tested it on powerpc64 in QEMU, which is the same
setup that previously triggered an illegal instruction, and all tests
pass now. On powerpc32 there are still some issues left as you say.

Thanks!
Johan


>
> - Naveen
>
>
> Naveen N. Rao (8):
>   powerpc/lib: Add helper to check if offset is within conditional
>     branch range
>   powerpc/bpf: Validate branch ranges
>   powerpc/bpf: Handle large branch ranges with BPF_EXIT
>   powerpc/bpf: Fix BPF_MOD when imm == 1
>   powerpc/bpf: Fix BPF_SUB when imm == 0x80000000
>   powerpc/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06
>   powerpc/security: Add a helper to query stf_barrier type
>   powerpc/bpf: Emit stf barrier instruction sequences for BPF_NOSPEC
>
> Ravi Bangoria (1):
>   powerpc/bpf: Remove unused SEEN_STACK
>
>  arch/powerpc/include/asm/code-patching.h     |   1 +
>  arch/powerpc/include/asm/ppc-opcode.h        |   1 +
>  arch/powerpc/include/asm/security_features.h |   5 +
>  arch/powerpc/kernel/security.c               |   5 +
>  arch/powerpc/lib/code-patching.c             |   7 +-
>  arch/powerpc/net/bpf_jit.h                   |  39 ++++---
>  arch/powerpc/net/bpf_jit64.h                 |   8 +-
>  arch/powerpc/net/bpf_jit_comp.c              |  28 ++++-
>  arch/powerpc/net/bpf_jit_comp32.c            |  10 +-
>  arch/powerpc/net/bpf_jit_comp64.c            | 113 ++++++++++++++-----
>  10 files changed, 167 insertions(+), 50 deletions(-)
>
>
> base-commit: 044c2d99d9f43c6d6fde8bed00672517dd9a5a57
> --
> 2.33.0
>