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Commit f381bf6d authored by David Daney's avatar David Daney Committed by Ralf Baechle
Browse files

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: default avatarDavid 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: default avatarRalf Baechle <ralf@linux-mips.org>
parent dc190129

arch/mips/Kconfig

+11 −1
Original line number Diff line number Diff line
@@ -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

arch/mips/net/Makefile

+2 −1
Original line number Diff line number Diff line 
# 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