target/linux/generic/backport-5.4/071-v5.16-05-mips-bpf-Enable-eBPF-JITs.patch

   1 From: Johan Almbladh <johan.almbladh@anyfinetworks.com>
   2 Date: Tue, 5 Oct 2021 18:54:07 +0200
   3 Subject: [PATCH] mips: bpf: Enable eBPF JITs
   4
   5 This patch enables the new eBPF JITs for 32-bit and 64-bit MIPS. It also
   6 disables the old cBPF JIT to so cBPF programs are converted to use the
   7 new JIT.
   8
   9 Workarounds for R4000 CPU errata are not implemented by the JIT, so the
  10 JIT is disabled if any of those workarounds are configured.
  11
  12 Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
  13 ---
  14
  15 --- a/MAINTAINERS
  16 +++ b/MAINTAINERS
  17 @@ -3099,6 +3099,7 @@ S:        Supported
  18  F:     arch/arm64/net/
  19
  20  BPF JIT for MIPS (32-BIT AND 64-BIT)
  21 +M:     Johan Almbladh <johan.almbladh@anyfinetworks.com>
  22  M:     Paul Burton <paulburton@kernel.org>
  23  L:     netdev@vger.kernel.org
  24  L:     bpf@vger.kernel.org
  25 --- a/arch/mips/Kconfig
  26 +++ b/arch/mips/Kconfig
  27 @@ -46,8 +46,10 @@ config MIPS
  28         select HAVE_ARCH_TRACEHOOK
  29         select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES
  30         select HAVE_ASM_MODVERSIONS
  31 -       select HAVE_CBPF_JIT if !64BIT && !CPU_MICROMIPS
  32 -       select HAVE_EBPF_JIT if 64BIT && !CPU_MICROMIPS && TARGET_ISA_REV >= 2
  33 +       select HAVE_EBPF_JIT if !CPU_MICROMIPS && \
  34 +                               !CPU_DADDI_WORKAROUNDS && \
  35 +                               !CPU_R4000_WORKAROUNDS && \
  36 +                               !CPU_R4400_WORKAROUNDS
  37         select HAVE_CONTEXT_TRACKING
  38         select HAVE_COPY_THREAD_TLS
  39         select HAVE_C_RECORDMCOUNT
  40 --- a/arch/mips/net/Makefile
  41 +++ b/arch/mips/net/Makefile
  42 @@ -2,9 +2,10 @@
  43  # MIPS networking code
  44
  45  obj-$(CONFIG_MIPS_CBPF_JIT) += bpf_jit.o bpf_jit_asm.o
  46 +obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp.o
  47
  48  ifeq ($(CONFIG_32BIT),y)
  49 -        obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp.o bpf_jit_comp32.o
  50 +        obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp32.o
  51  else
  52 -        obj-$(CONFIG_MIPS_EBPF_JIT) += ebpf_jit.o
  53 +        obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp64.o
  54  endif