mips, bpf: Enable eBPF JITs

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

diff --git a/MAINTAINERS b/MAINTAINERS
index 76e0fdc..407cd42 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -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

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 771ca53..38468f4 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -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

diff --git a/arch/mips/net/Makefile b/arch/mips/net/Makefile
index e057ee4..602bf24 100644 (file)
--- a/arch/mips/net/Makefile
+++ b/arch/mips/net/Makefile
@@ -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