From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A6DC64779A7; Mon, 20 Jul 2026 17:46:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784569604; cv=none; b=AWziX5jUt/QP8bj5NHag8ysljeRMHxojGuuzyYERNrJmY5NmPW8+nvkuePdC5yeCW6rEPvXNWFbDQi0EY7dQbmSbGTUkiq3fjo6++qliEz1qFuRHwUGCzw4x4guMAwb16tE0V5ZuhiZJiN/ExmHX7Wok34+1O+qfbGeMUfmlZs8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784569604; c=relaxed/simple; bh=K0a43zC/CH1JRV9XZ9iaXKo0MS6XUMZZHsZPAiQ70Pc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OQafnn/o+AVGLn3NugWzzEHzCaQeac8H4hwOFV9CtUb8Y4sqXiV3VTW2T9F/TuXv5CjxgyKNlLD+AmtlHg9tQRM7PpJ9frA9FwNzoHfm0gSqKwn+Ybs2PeZUuwjLnY4kasKupB6uPOfnYf03dim5aWP1uaLOY1VODkzafV3S7t8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=QxFMMS92; arc=none smtp.client-ip=192.198.163.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="QxFMMS92" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1784569593; x=1816105593; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=K0a43zC/CH1JRV9XZ9iaXKo0MS6XUMZZHsZPAiQ70Pc=; b=QxFMMS92OzfaTeesmu4TgAVNeBmGgJXf5AHr3HZ1j8gxosg2oEJlG9Mu F7wOqRIHxdKCXrVybiJjEJv5DAksjS3VU9ZzMaQeY//5wpcPUT3l89ZOT 41QpdSX6Sxu8hcnOpAFphePmvn9zzS8QNZDE8I4R9vJgWdANaV83s/Z1A bRqlJ7wEJZrx+bGF6gMC7T4ZVeLNjVJjiZuAfoAtR4tVMY1Yr0ivLlzY0 gQIbZhO+Q8cOjkUpRkUTh9emrJLdIaBQhdZAQBLUbq4X8CDkuUwgXZLD2 GFotP260sBMNRBNc3Sl5JGIEslSCll0Pukapjpk6IonoPqDOWh3A1XhAB A==; X-CSE-ConnectionGUID: 2lEmtkh3TM2u1hqDKGDK2Q== X-CSE-MsgGUID: nT7e92vbQ+iEASTJ+hODmA== X-IronPort-AV: E=McAfee;i="6800,10657,11852"; a="72691692" X-IronPort-AV: E=Sophos;i="6.25,175,1779174000"; d="scan'208";a="72691692" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jul 2026 10:46:08 -0700 X-CSE-ConnectionGUID: ma1vnY4ZTpOHzj8lxS7X4A== X-CSE-MsgGUID: BHpi7cttTm+BMXpM8movJA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,175,1779174000"; d="scan'208";a="257575383" Received: from chang-linux-3.sc.intel.com (HELO chang-linux-3) ([172.25.66.174]) by orviesa007.jf.intel.com with ESMTP; 20 Jul 2026 10:46:08 -0700 From: "Chang S. Bae" To: pbonzini@redhat.com, seanjc@google.com Cc: kvm@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, chang.seok.bae@intel.com Subject: [PATCH v5 13/20] KVM: x86: Reject EVEX-prefixed instructions Date: Mon, 20 Jul 2026 17:19:42 +0000 Message-ID: <20260720171949.498680-14-chang.seok.bae@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260720171949.498680-1-chang.seok.bae@intel.com> References: <20260720171949.498680-1-chang.seok.bae@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Explicitly mark EVEX-prefixed opcodes (0x62) as unsupported. Signed-off-by: Chang S. Bae --- arch/x86/kvm/emulate.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index cb075bd74f76..fc7f9f17c1da 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -5045,6 +5045,11 @@ int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len, int if (opcode.flags & ModRM) ctxt->modrm = insn_fetch(u8, ctxt); + /* EVEX-prefixed instructions are not implemented */ + if (ctxt->opcode_len == 1 && ctxt->b == 0x62 && + (mode == X86EMUL_MODE_PROT64 || (ctxt->modrm & 0xc0) == 0xc0)) + opcode.flags = NotImpl; + done_modrm: ctxt->d = opcode.flags; while (ctxt->d & GroupMask) { -- 2.53.0