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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F62AC433E6 for ; Wed, 6 Jan 2021 01:57:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F2612246B for ; Wed, 6 Jan 2021 01:57:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725868AbhAFB5U (ORCPT ); Tue, 5 Jan 2021 20:57:20 -0500 Received: from mga12.intel.com ([192.55.52.136]:49046 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725836AbhAFB5U (ORCPT ); Tue, 5 Jan 2021 20:57:20 -0500 IronPort-SDR: Rs0A+4k3xDDDyk2SqCey+px7rK2CIFqgfhl448+jZl79D32Ov399Na5x8yLZwo1iQ2dvviHlpP X83SWYSCneKQ== X-IronPort-AV: E=McAfee;i="6000,8403,9855"; a="156402867" X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="156402867" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 17:56:39 -0800 IronPort-SDR: nPffuQJ1S3sA6uulqUmQVkNs9U+3SdFLAs5rCc5BI2RBqLUxtDjbw/V1GQtSUJccFU1NePRkAp R5JNjHHSmGKg== X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="421993352" Received: from zhuoxuan-mobl.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.251.29.237]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 17:56:36 -0800 From: Kai Huang To: linux-sgx@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org Cc: seanjc@google.com, jarkko@kernel.org, luto@kernel.org, dave.hansen@intel.com, haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, Kai Huang Subject: [RFC PATCH 10/23] x86/sgx: Add helper to update SGX_LEPUBKEYHASHn MSRs Date: Wed, 6 Jan 2021 14:56:19 +1300 Message-Id: <04d9ce405377c9f679dd8b3b8118f3a16aa4742e.1609890536.git.kai.huang@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org Add a helper to update SGX_LEPUBKEYHASHn MSRs. SGX virtualization also needs to update those MSRs based on guest's "virtual" SGX_LEPUBKEYHASHn before EINIT from guest. Signed-off-by: Kai Huang --- arch/x86/kernel/cpu/sgx/ioctl.c | 5 ++--- arch/x86/kernel/cpu/sgx/main.c | 8 ++++++++ arch/x86/kernel/cpu/sgx/sgx.h | 2 ++ 3 files changed, 12 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c index e5977752c7be..1bae754268d1 100644 --- a/arch/x86/kernel/cpu/sgx/ioctl.c +++ b/arch/x86/kernel/cpu/sgx/ioctl.c @@ -495,7 +495,7 @@ static int sgx_encl_init(struct sgx_encl *encl, struct sgx_sigstruct *sigstruct, void *token) { u64 mrsigner[4]; - int i, j, k; + int i, j; void *addr; int ret; @@ -544,8 +544,7 @@ static int sgx_encl_init(struct sgx_encl *encl, struct sgx_sigstruct *sigstruct, preempt_disable(); - for (k = 0; k < 4; k++) - wrmsrl(MSR_IA32_SGXLEPUBKEYHASH0 + k, mrsigner[k]); + sgx_update_lepubkeyhash(mrsigner); ret = __einit(sigstruct, token, addr); diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c index 9ad6ab6d4310..fd77b5775bc4 100644 --- a/arch/x86/kernel/cpu/sgx/main.c +++ b/arch/x86/kernel/cpu/sgx/main.c @@ -714,6 +714,14 @@ static bool __init sgx_page_cache_init(void) return true; } +void sgx_update_lepubkeyhash(u64 *lepubkeyhash) +{ + int i; + + for (i = 0; i < 4; i++) + wrmsrl(MSR_IA32_SGXLEPUBKEYHASH0 + i, lepubkeyhash[i]); +} + static void __init sgx_init(void) { int ret; diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h index 1a3312acbcd9..ca741577fea5 100644 --- a/arch/x86/kernel/cpu/sgx/sgx.h +++ b/arch/x86/kernel/cpu/sgx/sgx.h @@ -84,4 +84,6 @@ void sgx_mark_page_reclaimable(struct sgx_epc_page *page); int sgx_unmark_page_reclaimable(struct sgx_epc_page *page); struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim); +void sgx_update_lepubkeyhash(u64 *lepubkeyhash); + #endif /* _X86_SGX_H */ -- 2.29.2