Merge tag 'acpi-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...

[linux-2.6-microblaze.git] / include / linux / filter.h

diff --git a/include/linux/filter.h b/include/linux/filter.h
index 472f970..83b8960 100644 (file)
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -73,6 +73,11 @@ struct ctl_table_header;
 /* unused opcode to mark call to interpreter with arguments */
 #define BPF_CALL_ARGS  0xe0
 
+/* unused opcode to mark speculation barrier for mitigating
+ * Speculative Store Bypass
+ */
+#define BPF_NOSPEC     0xc0
+
 /* As per nm, we expose JITed images as text (code) section for
  * kallsyms. That way, tools like perf can find it to match
  * addresses.
@@ -390,6 +395,16 @@ static inline bool insn_is_zext(const struct bpf_insn *insn)
                .off   = 0,                                     \
                .imm   = 0 })
 
+/* Speculation barrier */
+
+#define BPF_ST_NOSPEC()                                                \
+       ((struct bpf_insn) {                                    \
+               .code  = BPF_ST | BPF_NOSPEC,                   \
+               .dst_reg = 0,                                   \
+               .src_reg = 0,                                   \
+               .off   = 0,                                     \
+               .imm   = 0 })
+
 /* Internal classic blocks for direct assignment */
 
 #define __BPF_STMT(CODE, K)                                    \