From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10830C6FD1C for ; Sun, 12 Mar 2023 09:58:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230261AbjCLJ6j (ORCPT ); Sun, 12 Mar 2023 05:58:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37606 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230263AbjCLJ6A (ORCPT ); Sun, 12 Mar 2023 05:58:00 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B17656785 for ; Sun, 12 Mar 2023 01:57:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678615047; x=1710151047; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8GeyfmjA2v6m5gyxDArFiKnkdq1a+4Fmk3OZAtrfGkw=; b=ZLauv/1/IBAJxR542U74zMgqIspDSOT3VDntxmfmmCkbQspmlYXhUjgL FCRuqa7bM89yLZnsCLMGQFgbuSzbXs2+QPeA0FiAgQ6FXynik/8Z6umgw v9lMxaKAbnL13m2DRQh/7ZSyC5Bb0od3jmAm4owtEhVPv/d/9RW+W8YjG voISDdGKbVXGHW2J6XDV0mUO/8Pj42ZPwpKZ+qdtdHqeH7TW42IJQF91T 2r2qyxl5+b4+plVsEOvlVc3hR6KNEKOvO9U2j3eZ/059p2CyNEXK1p3ZL kU5Qm6Lc1u6SL+Kt/istRJXwemf7kAAvLza0EYVfgZ5r/yUkUXLbkhkHF A==; X-IronPort-AV: E=McAfee;i="6500,9779,10646"; a="336998091" X-IronPort-AV: E=Sophos;i="5.98,254,1673942400"; d="scan'208";a="336998091" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Mar 2023 01:56:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10646"; a="680677643" X-IronPort-AV: E=Sophos;i="5.98,254,1673942400"; d="scan'208";a="680677643" Received: from jiechen-ubuntu-dev.sh.intel.com ([10.239.154.150]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Mar 2023 01:56:09 -0800 From: Jason Chen CJ To: kvm@vger.kernel.org Cc: Jason Chen CJ Subject: [RFC PATCH part-5 01/22] pkvm: x86: Add memcpy lib Date: Mon, 13 Mar 2023 02:02:42 +0800 Message-Id: <20230312180303.1778492-2-jason.cj.chen@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230312180303.1778492-1-jason.cj.chen@intel.com> References: <20230312180303.1778492-1-jason.cj.chen@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org pKVM need its own memcpy library, it cannot directly use arch/x86/lib/memcpy_64.S as it's based on ALTERNATIVE section which pKVM does not support yet. Signed-off-by: Jason Chen CJ --- arch/x86/kvm/vmx/pkvm/hyp/Makefile | 1 + arch/x86/kvm/vmx/pkvm/hyp/lib/memcpy_64.S | 26 +++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/arch/x86/kvm/vmx/pkvm/hyp/Makefile b/arch/x86/kvm/vmx/pkvm/hyp/Makefile index fe852bd43a7e..9c410ec96f45 100644 --- a/arch/x86/kvm/vmx/pkvm/hyp/Makefile +++ b/arch/x86/kvm/vmx/pkvm/hyp/Makefile @@ -17,6 +17,7 @@ pkvm-hyp-y := vmx_asm.o vmexit.o memory.o early_alloc.o pgtable.o mmu.o pkvm.o \ ifndef CONFIG_PKVM_INTEL_DEBUG lib-dir := lib pkvm-hyp-y += $(lib-dir)/memset_64.o +pkvm-hyp-y += $(lib-dir)/memcpy_64.o pkvm-hyp-$(CONFIG_RETPOLINE) += $(lib-dir)/retpoline.o pkvm-hyp-$(CONFIG_DEBUG_LIST) += $(lib-dir)/list_debug.o endif diff --git a/arch/x86/kvm/vmx/pkvm/hyp/lib/memcpy_64.S b/arch/x86/kvm/vmx/pkvm/hyp/lib/memcpy_64.S new file mode 100644 index 000000000000..b976f646d352 --- /dev/null +++ b/arch/x86/kvm/vmx/pkvm/hyp/lib/memcpy_64.S @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright 2002 Andi Kleen */ + +#include + +/* + * memcpy - Copy a memory block. + * + * Input: + * rdi destination + * rsi source + * rdx count + * + * Output: + * rax original destination + * + * This is enhanced fast string memcpy. It is faster and + * simpler than old memcpy. + */ + +SYM_FUNC_START(memcpy) + movq %rdi, %rax + movq %rdx, %rcx + rep movsb + RET +SYM_FUNC_END(memcpy) -- 2.25.1