From 78410b0969c888bbde7d0111a275dff1c71f2401 Mon Sep 17 00:00:00 2001
From: John Soo <jsoo1@asu.edu>
Date: Sat, 13 Jun 2020 22:52:55 -0700
Subject: gnu: Add linux-libre-with-bpf.

* gnu/packages/linux (%bpf-extra-linux-options): New variable,
(linux-libre-with-bpf): new variable.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
---
 gnu/packages/linux.scm | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index fce6c5037c..94d3b37845 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -75,6 +75,7 @@
   #:use-module (gnu packages bison)
   #:use-module (gnu packages calendar)
   #:use-module (gnu packages check)
+  #:use-module (gnu packages cpio)
   #:use-module (gnu packages crypto)
   #:use-module (gnu packages cryptsetup)
   #:use-module (gnu packages compression)
@@ -619,6 +620,30 @@ for ARCH and optionally VARIANT, or #f if there is no such configuration."
     ("CONFIG_CIFS" . m)
     ("CONFIG_9P_FS" . m)))
 
+;; See https://github.com/iovisor/bcc/blob/master/INSTALL.md#kernel-configuration
+(define %bpf-extra-linux-options
+  `(;; Needed for probes
+    ("CONFIG_UPROBE_EVENTS" . #t)
+    ("CONFIG_KPROBE_EVENTS" . #t)
+    ;; kheaders module also helpful for tracing
+    ("CONFIG_IKHEADERS" . #t)
+    ("CONFIG_BPF" . #t)
+    ("CONFIG_BPF_SYSCALL" . #t)
+    ("CONFIG_BPF_JIT_ALWAYS_ON" . #t)
+    ;; optional, for tc filters
+    ("CONFIG_NET_CLS_BPF" . m)
+    ;; optional, for tc actions
+    ("CONFIG_NET_ACT_BPF" . m)
+    ("CONFIG_BPF_JIT" . #t)
+    ;; for Linux kernel versions 4.1 through 4.6
+    ;; ("CONFIG_HAVE_BPF_JIT" . y)
+    ;; for Linux kernel versions 4.7 and later
+    ("CONFIG_HAVE_EBPF_JIT" . #t)
+    ;; optional, for kprobes
+    ("CONFIG_BPF_EVENTS" . #t)
+    ;; kheaders module
+    ("CONFIG_IKHEADERS" . #t)))
+
 (define (config->string options)
   (string-join (map (match-lambda
                       ((option . 'm)
@@ -937,6 +962,23 @@ It has been modified to remove all non-free binary blobs.")
                      '("riscv64-linux")
                      #:extra-version "riscv64-generic"))
 
+(define-public linux-libre-with-bpf
+  (let ((base-linux-libre
+         (make-linux-libre*
+          linux-libre-5.4-version
+          linux-libre-5.4-source
+          '("x86_64-linux" "i686-linux" "armhf-linux"
+            "aarch64-linux" "riscv64-linux")
+          #:extra-version "bpf"
+          #:configuration-file kernel-config
+          #:extra-options
+          (append %bpf-extra-linux-options
+                  %default-extra-linux-options))))
+    (package
+      (inherit base-linux-libre)
+      (inputs `(("cpio" ,cpio) ,@(package-inputs base-linux-libre))))))
+
+
 
 ;;;
 ;;; Linux kernel modules.
-- 
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