From 40bcbd6c9b4056e47daaca6dcd900cefcdc74fa6 Mon Sep 17 00:00:00 2001
From: mzz2017 <2017@duck.com>
Date: Tue, 21 Mar 2023 16:07:56 +0800
Subject: [PATCH] docs: need CONFIG_BPF_EVENTS for bpf features judging

---
 control/bpf_utils.go           | 2 ++
 docs/getting-started/README.md | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/control/bpf_utils.go b/control/bpf_utils.go
index 7550b88..b940dbf 100644
--- a/control/bpf_utils.go
+++ b/control/bpf_utils.go
@@ -213,6 +213,8 @@ retryLoadBpf:
 			err = fmt.Errorf("%w: you should re-compile linux kernel with BTF configurations; see docs for more information", err)
 		} else if strings.Contains(err.Error(), "unknown func bpf_trace_printk") {
 			err = fmt.Errorf(`%w: please try to compile dae without bpf_printk; example of cross-compilation to arm64: make GOARCH=arm64 CGO_ENABLED=0 CFLAGS="-D__REMOVE_BPF_PRINTK"`, err)
+		} else if strings.Contains(err.Error(), "unknown func bpf_probe_read") {
+			err = fmt.Errorf(`%w: please re-compile linux kernel with CONFIG_BPF_EVENTS=y"`, err)
 		}
 		return err
 	}
diff --git a/docs/getting-started/README.md b/docs/getting-started/README.md
index 5c6710a..11e4e62 100644
--- a/docs/getting-started/README.md
+++ b/docs/getting-started/README.md
@@ -38,6 +38,7 @@ zcat /proc/config.gz || cat /boot/{config,config-$(uname -r)}
 dae needs:
 ```
 CONFIG_DEBUG_INFO_BTF=y
+CONFIG_BPF_EVENTS=y
 CONFIG_NET_CLS_ACT=y
 CONFIG_NET_SCH_INGRESS=m
 CONFIG_NET_INGRESS=y
@@ -46,7 +47,7 @@ CONFIG_NET_EGRESS=y
 Check them using command like:
 
 ```shell
-(zcat /proc/config.gz || cat /boot/{config,config-$(uname -r)}) | grep -E 'CONFIG_(DEBUG_INFO_BTF|NET_CLS_ACT|NET_SCH_INGRESS|NET_INGRESS|NET_EGRESS)='
+(zcat /proc/config.gz || cat /boot/{config,config-$(uname -r)}) | grep -E 'CONFIG_(DEBUG_INFO_BTF|CONFIG_BPF_EVENTS|NET_CLS_ACT|NET_SCH_INGRESS|NET_INGRESS|NET_EGRESS)='
 ```
 
 > **Note**