From patchwork Tue Mar 15 01:02:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Cathy" X-Patchwork-Id: 12780914 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 34C9BC43217 for ; Tue, 15 Mar 2022 01:02:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344094AbiCOBDw (ORCPT ); Mon, 14 Mar 2022 21:03:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344090AbiCOBDv (ORCPT ); Mon, 14 Mar 2022 21:03:51 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F13344751; Mon, 14 Mar 2022 18:02:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647306161; x=1678842161; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=bG75tiB7pTL3Zxa5XwwH6wgiRtXblx45pRj+5lOZYEo=; b=OSUUo+UsP55FjZ87fAkLYkgXebCRzSUigz7f1j9xxTzX08KdvofZUe3q 4RkkTPc/t5JlUNQyIKDRG6xVbL4O/KIBN/K6Agsh5aCCIb7on2jkAakVN bfoakGQnx4MSVZF+UfOd6/b5yh22wZU04jTh/W/LjO+9h8v0ajiLfJL/5 3qry+JPXyvTN+Q/PSUJ1XLC8ps6N6Ra0oQGha1vUypqs9f2Phm7Exrln1 J/75HZ/LijzbVmF6soTn9CysoWbU041FtsGhZpNmHUGdBJJO51dFYyspj Bu2nF9oGl3XZk2xIKC64fN8/d+y7BRiViciN3pMPGkytXcxrVDSBZgrvq Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10286"; a="255912354" X-IronPort-AV: E=Sophos;i="5.90,181,1643702400"; d="scan'208";a="255912354" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Mar 2022 18:02:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,181,1643702400"; d="scan'208";a="515669327" Received: from cathy-vostro-3670.bj.intel.com ([10.238.156.128]) by orsmga006.jf.intel.com with ESMTP; 14 Mar 2022 18:02:39 -0700 From: Cathy Zhang To: linux-sgx@vger.kernel.org, linux-kernel@vger.kernel.org Cc: dave.hansen@intel.com, ashok.raj@intel.com, cathy.zhang@intel.com Subject: [RFC PATCH v2 04/10] x86/sgx: Keep record for SGX VA and Guest page type Date: Tue, 15 Mar 2022 09:02:54 +0800 Message-Id: <20220315010300.10199-5-cathy.zhang@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220315010300.10199-1-cathy.zhang@intel.com> References: <20220315010300.10199-1-cathy.zhang@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org Regular enclave EPC pages have sgx_encl_page as their owner, but SGX VA page and KVM guest EPC page are maintained by different owner structures. SGX CPUSVN update requires to know the EPC page owner's status and then decide how to handle the page. Keep a record of page type for SGX VA and KVM guest page while the other EPC pages already have their type tracked, so that CPUSVN update can get EPC page's owner by type and handle it then. Signed-off-by: Cathy Zhang --- arch/x86/kernel/cpu/sgx/sgx.h | 4 ++++ arch/x86/kernel/cpu/sgx/encl.c | 2 ++ arch/x86/kernel/cpu/sgx/virt.c | 2 ++ 3 files changed, 8 insertions(+) diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h index e627c42a6eec..1dd06899a64c 100644 --- a/arch/x86/kernel/cpu/sgx/sgx.h +++ b/arch/x86/kernel/cpu/sgx/sgx.h @@ -28,6 +28,10 @@ /* Pages on free list */ #define SGX_EPC_PAGE_IS_FREE BIT(1) +/* VA page */ +#define SGX_EPC_PAGE_VA BIT(2) +/* Pages allocated for KVM guest */ +#define SGX_EPC_PAGE_GUEST BIT(3) struct sgx_epc_page { unsigned int section; diff --git a/arch/x86/kernel/cpu/sgx/encl.c b/arch/x86/kernel/cpu/sgx/encl.c index e08c59a049d3..a78428aa4465 100644 --- a/arch/x86/kernel/cpu/sgx/encl.c +++ b/arch/x86/kernel/cpu/sgx/encl.c @@ -1014,6 +1014,8 @@ struct sgx_epc_page *sgx_alloc_va_page(struct sgx_va_page *va_page) return ERR_PTR(-EFAULT); } + epc_page->flags |= SGX_EPC_PAGE_VA; + return epc_page; } diff --git a/arch/x86/kernel/cpu/sgx/virt.c b/arch/x86/kernel/cpu/sgx/virt.c index e953816d7c8b..acdf72769a39 100644 --- a/arch/x86/kernel/cpu/sgx/virt.c +++ b/arch/x86/kernel/cpu/sgx/virt.c @@ -50,6 +50,8 @@ static int __sgx_vepc_fault(struct sgx_vepc *vepc, if (IS_ERR(epc_page)) return PTR_ERR(epc_page); + epc_page->flags |= SGX_EPC_PAGE_GUEST; + ret = xa_err(xa_store(&vepc->page_array, index, epc_page, GFP_KERNEL)); if (ret) goto err_free;