MIPS: Add support for eBPF JIT.

Since the eBPF machine has 64-bit registers, we only support this in
64-bit kernels.  As of the writing of this commit log test-bpf is showing:

  test_bpf: Summary: 316 PASSED, 0 FAILED, [308/308 JIT'ed]

All current test cases are successfully compiled.

Many examples in samples/bpf are usable, specifically tracex5 which
uses tail calls works.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16369/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 0b15978c0f88a2e4d859f831a5c4ae5a939b9940..9891a1285f25eb3e37e0d317f7f5ad958b006467 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -33,7 +33,8 @@ config MIPS
        select HAVE_ARCH_SECCOMP_FILTER
        select HAVE_ARCH_TRACEHOOK
        select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES && 64BIT
-       select HAVE_CBPF_JIT if !CPU_MICROMIPS
+       select HAVE_CBPF_JIT if (!64BIT && !CPU_MICROMIPS)
+       select HAVE_EBPF_JIT if (64BIT && !CPU_MICROMIPS)
        select HAVE_CC_STACKPROTECTOR
        select HAVE_CONTEXT_TRACKING
        select HAVE_COPY_THREAD_TLS
@@ -1178,6 +1179,15 @@ config SYS_SUPPORTS_RELOCATABLE
         The platform must provide plat_get_fdt() if it selects CONFIG_USE_OF
         to allow access to command line and entropy sources.
 
+config MIPS_CBPF_JIT
+       def_bool y
+       depends on BPF_JIT && HAVE_CBPF_JIT
+
+config MIPS_EBPF_JIT
+       def_bool y
+       depends on BPF_JIT && HAVE_EBPF_JIT
+
+
 #
 # Endianness selection.  Sufficiently obscure so many users don't know what to
 # answer,so we try hard to limit the available choices.  Also the use of a

diff --git a/arch/mips/net/Makefile b/arch/mips/net/Makefile
index 8c2771401f545ab37fd643ad5dcd2683f7f63b0d..47d678416715e1213af52d0e3341423783e6b6f8 100644 (file)
--- a/arch/mips/net/Makefile
+++ b/arch/mips/net/Makefile
@@ -1,3 +1,4 @@
 # MIPS networking code
 
-obj-$(CONFIG_BPF_JIT) += bpf_jit.o bpf_jit_asm.o
+obj-$(CONFIG_MIPS_CBPF_JIT) += bpf_jit.o bpf_jit_asm.o
+obj-$(CONFIG_MIPS_EBPF_JIT) += ebpf_jit.o