bpf: Support new unconditional bswap instruction

[platform/kernel/linux-rpi.git] / kernel / bpf / core.c

diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index c37c454..ad58697 100644 (file)
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -1524,6 +1524,7 @@ EXPORT_SYMBOL_GPL(__bpf_call_base);
        INSN_3(ALU64, DIV,  X),                 \
        INSN_3(ALU64, MOD,  X),                 \
        INSN_2(ALU64, NEG),                     \
+       INSN_3(ALU64, END, TO_LE),              \
        /*   Immediate based. */                \
        INSN_3(ALU64, ADD,  K),                 \
        INSN_3(ALU64, SUB,  K),                 \
@@ -1848,6 +1849,19 @@ select_insn:
                        break;
                }
                CONT;
+       ALU64_END_TO_LE:
+               switch (IMM) {
+               case 16:
+                       DST = (__force u16) __swab16(DST);
+                       break;
+               case 32:
+                       DST = (__force u32) __swab32(DST);
+                       break;
+               case 64:
+                       DST = (__force u64) __swab64(DST);
+                       break;
+               }
+               CONT;
 
        /* CALL */
        JMP_CALL: