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mips, bpf: Enable eBPF JITs

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This patch enables the new eBPF JITs for 32-bit and 64-bit MIPS. It also
disables the old cBPF JIT to so cBPF programs are converted to use the
new JIT.

Workarounds for R4000 CPU errata are not implemented by the JIT, so the
JIT is disabled if any of those workarounds are configured.

Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211005165408.2305108-7-johan.almbladh@anyfinetworks.com
This commit is contained in:
Johan Almbladh 2021-10-05 18:54:07 +02:00 committed by Andrii Nakryiko
parent 72570224bb
commit 01bdc58e94
3 changed files with 8 additions and 4 deletions
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1
MAINTAINERS
View file

@ -3422,6 +3422,7 @@ S: Supported
F: arch/arm64/net/
BPF JIT for MIPS (32-BIT AND 64-BIT)
M: Johan Almbladh <johan.almbladh@anyfinetworks.com>
M: Paul Burton <paulburton@kernel.org>
L: netdev@vger.kernel.org
L: bpf@vger.kernel.org

6
arch/mips/Kconfig
View file

@ -57,7 +57,6 @@ config MIPS
select HAVE_ARCH_TRACEHOOK
select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES
select HAVE_ASM_MODVERSIONS
select HAVE_CBPF_JIT if !64BIT && !CPU_MICROMIPS
select HAVE_CONTEXT_TRACKING
select HAVE_TIF_NOHZ
select HAVE_C_RECORDMCOUNT
@ -65,7 +64,10 @@ config MIPS
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DMA_CONTIGUOUS
select HAVE_DYNAMIC_FTRACE
select HAVE_EBPF_JIT if 64BIT && !CPU_MICROMIPS && TARGET_ISA_REV >= 2
select HAVE_EBPF_JIT if !CPU_MICROMIPS && \
!CPU_DADDI_WORKAROUNDS && \
!CPU_R4000_WORKAROUNDS && \
!CPU_R4400_WORKAROUNDS
select HAVE_EXIT_THREAD
select HAVE_FAST_GUP
select HAVE_FTRACE_MCOUNT_RECORD

5
arch/mips/net/Makefile
View file

@ -2,9 +2,10 @@
# MIPS networking code
obj-$(CONFIG_MIPS_CBPF_JIT) += bpf_jit.o bpf_jit_asm.o
obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp.o
ifeq ($(CONFIG_32BIT),y)
obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp.o bpf_jit_comp32.o
obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp32.o
else
obj-$(CONFIG_MIPS_EBPF_JIT) += ebpf_jit.o
obj-$(CONFIG_MIPS_EBPF_JIT) += bpf_jit_comp64.o
endif