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-rw-r--r--include/linux/bpf.h1
-rw-r--r--include/uapi/linux/bpf.h1
-rw-r--r--kernel/bpf/core.c1
-rw-r--r--kernel/bpf/helpers.c12
-rw-r--r--net/core/filter.c2
5 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 50bf95e29a96..30bfd331882a 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -155,5 +155,6 @@ extern const struct bpf_func_proto bpf_map_update_elem_proto;
extern const struct bpf_func_proto bpf_map_delete_elem_proto;
extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
+extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
#endif /* _LINUX_BPF_H */
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 1c2ca2b477c8..de1f63668daf 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -166,6 +166,7 @@ enum bpf_func_id {
BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
BPF_FUNC_get_prandom_u32, /* u32 prandom_u32(void) */
+ BPF_FUNC_get_smp_processor_id, /* u32 raw_smp_processor_id(void) */
__BPF_FUNC_MAX_ID,
};
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index c1dbbb5d289b..4139a0f8b558 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -662,6 +662,7 @@ const struct bpf_func_proto bpf_map_update_elem_proto __weak;
const struct bpf_func_proto bpf_map_delete_elem_proto __weak;
const struct bpf_func_proto bpf_get_prandom_u32_proto __weak;
+const struct bpf_func_proto bpf_get_smp_processor_id_proto __weak;
/* To execute LD_ABS/LD_IND instructions __bpf_prog_run() may call
* skb_copy_bits(), so provide a weak definition of it for NET-less config.
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 95eb59a045ea..bd7f5988ed9c 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -12,6 +12,7 @@
#include <linux/bpf.h>
#include <linux/rcupdate.h>
#include <linux/random.h>
+#include <linux/smp.h>
/* If kernel subsystem is allowing eBPF programs to call this function,
* inside its own verifier_ops->get_func_proto() callback it should return
@@ -99,3 +100,14 @@ const struct bpf_func_proto bpf_get_prandom_u32_proto = {
.gpl_only = false,
.ret_type = RET_INTEGER,
};
+
+static u64 bpf_get_smp_processor_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
+{
+ return raw_smp_processor_id();
+}
+
+const struct bpf_func_proto bpf_get_smp_processor_id_proto = {
+ .func = bpf_get_smp_processor_id,
+ .gpl_only = false,
+ .ret_type = RET_INTEGER,
+};
diff --git a/net/core/filter.c b/net/core/filter.c
index 4344db39af2e..33310eee6134 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1141,6 +1141,8 @@ sk_filter_func_proto(enum bpf_func_id func_id)
return &bpf_map_delete_elem_proto;
case BPF_FUNC_get_prandom_u32:
return &bpf_get_prandom_u32_proto;
+ case BPF_FUNC_get_smp_processor_id:
+ return &bpf_get_smp_processor_id_proto;
default:
return NULL;
}