From: Felix Fietkau <nbd@nbd.name>
Date: Mon, 20 Dec 2021 23:28:54 +0000 (+0100)
Subject: bpf: add -mcpu=v3 to support 32-bit alu ops
X-Git-Tag: mikrotik~435
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c46202fb34bbf6d1e159c1a1bbdec8a9ec726285;p=openwrt%2Fstaging%2Fchunkeey.git

bpf: add -mcpu=v3 to support 32-bit alu ops

Fixes JIT on 32-bit ARM and improves performance

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/include/bpf.mk b/include/bpf.mk
index 411763c4a2..ce30e24434 100644
--- a/include/bpf.mk
+++ b/include/bpf.mk
@@ -76,7 +76,7 @@ define CompileBPF
 		-c $(1) -o $(patsubst %.c,%.bc,$(1))
 	$(LLVM_OPT) -O2 -mtriple=$(BPF_TARGET) < $(patsubst %.c,%.bc,$(1)) > $(patsubst %.c,%.opt,$(1))
 	$(LLVM_DIS) < $(patsubst %.c,%.opt,$(1)) > $(patsubst %.c,%.S,$(1))
-	$(LLVM_LLC) -march=$(BPF_TARGET) -filetype=obj -o $(patsubst %.c,%.o,$(1)) < $(patsubst %.c,%.S,$(1))
+	$(LLVM_LLC) -march=$(BPF_TARGET) -mcpu=v3 -filetype=obj -o $(patsubst %.c,%.o,$(1)) < $(patsubst %.c,%.S,$(1))
 	$(CP) $(patsubst %.c,%.o,$(1)) $(patsubst %.c,%.debug.o,$(1))
 	$(LLVM_STRIP) --strip-debug $(patsubst %.c,%.o,$(1))
 endef