From patchwork Wed Mar 9 10:40:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Cathy" X-Patchwork-Id: 12774907 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 ABDCCC4332F for ; Wed, 9 Mar 2022 10:40:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230490AbiCIKl1 (ORCPT ); Wed, 9 Mar 2022 05:41:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38212 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230493AbiCIKl1 (ORCPT ); Wed, 9 Mar 2022 05:41:27 -0500 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B551437BF6 for ; Wed, 9 Mar 2022 02:40:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646822428; x=1678358428; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=bG75tiB7pTL3Zxa5XwwH6wgiRtXblx45pRj+5lOZYEo=; b=bfnkWspN/FCDBLb0QKhC0BCLgrnyxOVFhTefzQnbai3wwnVMBhhecCBL UvjPJYBqROuEtykVaf6NJ2nv7uty/NhormmDsIYnqQOAuDTZU56ToujV/ W2+XuJNeSFSjo2u1a17GFIaH2hF9i1BFDzMS8KAyGdbuMg+E4VEVOlxDj dMTexKKxSDEMggbRIjTgrKBeCxPMgt6qhriOFJf6rtncFrienFTgnkvAi kSXXmw1AN4pSxYKemSAUe2FQa5xf5yuE7B7QJzF5HVauq5H/yxoz4FPiC M5z7VxkIBjrgbBQC6JaVbGYOkjpl6W6Az5f4cOEbfaRTKimRknvbA4MOS g==; X-IronPort-AV: E=McAfee;i="6200,9189,10280"; a="341373556" X-IronPort-AV: E=Sophos;i="5.90,167,1643702400"; d="scan'208";a="341373556" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2022 02:40:28 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,167,1643702400"; d="scan'208";a="547582879" Received: from cathy-vostro-3670.bj.intel.com ([10.238.156.128]) by fmsmga007.fm.intel.com with ESMTP; 09 Mar 2022 02:40:27 -0800 From: Cathy Zhang To: linux-sgx@vger.kernel.org, x86@kernel.org Cc: dave.hansen@intel.com, cathy.zhang@intel.com Subject: [RFC PATCH 04/11] x86/sgx: Keep record for SGX VA and Guest page type Date: Wed, 9 Mar 2022 18:40:43 +0800 Message-Id: <20220309104050.18207-5-cathy.zhang@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220309104050.18207-1-cathy.zhang@intel.com> References: <20220309104050.18207-1-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;