Explicitly mark EVEX-prefixed opcodes (0x62) as unsupported, clarifying current decoding behavior. While new prefixes like REX2 extend GPR handling, EVEX emulation should be addressed separately once after VEX support is implemented. Signed-off-by: Chang S. Bae --- arch/x86/kvm/emulate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 03f8e007b14e..9bd61ea496e5 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -4952,8 +4952,8 @@ int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len, int if (ctxt->d & ModRM) ctxt->modrm = insn_fetch(u8, ctxt); - /* vex-prefix instructions are not implemented */ - if (ctxt->opcode_len == 1 && (ctxt->b == 0xc5 || ctxt->b == 0xc4) && + /* VEX and EVEX-prefixed instructions are not implemented */ + if (ctxt->opcode_len == 1 && (ctxt->b == 0xc5 || ctxt->b == 0xc4 || ctxt->b == 0x62) && (mode == X86EMUL_MODE_PROT64 || (ctxt->modrm & 0xc0) == 0xc0)) { ctxt->d = NotImpl; } -- 2.51.0