From patchwork Wed Jul 12 23:01:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haitao Huang X-Patchwork-Id: 119385 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:a6b2:0:b0:3e4:2afc:c1 with SMTP id c18csp1470829vqm; Wed, 12 Jul 2023 16:12:31 -0700 (PDT) X-Google-Smtp-Source: APBJJlFdK5Vb3VvpF61WSQv5dj4nKvWJW13VKcZvE4hDRa2A8oRZ7rr08COIapMDT+gHXHQqIwTb X-Received: by 2002:a05:6808:2388:b0:3a4:1c0b:85d0 with SMTP id bp8-20020a056808238800b003a41c0b85d0mr6636477oib.55.1689203550854; Wed, 12 Jul 2023 16:12:30 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1689203550; cv=none; d=google.com; s=arc-20160816; b=nju4zjZnINytzabNUxRE1Mi68VqXA11cmAW1r5LYaW1zVnmIt6tPtubuShXu6/HiBm 5e5y0K+qhqIFJ0NQb5p5FYoN4sECgf6CJmAcj1fHNEOZJD2RCSb2nxcE667EBV+fybA0 /m+4qOfu6nV2NDwnZDrzRHunX4IMDKc/8rfo3Ky4eK83XmP/Ottxl/qQVdAE69HlzRzj 5XI4mGLPmfmi9fBouhaumgObs+qA43TLroFRd9Euip7ipdzqPY03t3+K4WIgy7mK0fO0 Kw+LltEy/gVmqKnPRA/8qXdyD0+PwnTFYJ368gAg9sIR8uuI4HpwQXcJyjYwTcaNQPQP swCQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=r3IiiiWagHJsOQ3M/VksCyE3D/NVlKL04GAltjpmPH8=; fh=sp9Fy9uDTUYbTQiOiWOfY01qY8ktdO/xQ5V81goPrjk=; b=jf09JdGNFPe9Vatx2JVkX4afHT0LBdYFrQ7t5KV1w06rSH9v6I/zK4rMMC9o+2z7Y7 I2/m6HSSCCbF3c2pEnwz02+14WNj3gUdPT8TAXWWxaDnYH+V3KXtg9RxRRi1/mPeXohi r4KKEcghYx53LeaIVYuAKc0aKO6ugBV+N8VB7mNvO7AIdCcys7HWTdp19VukQO7Sqwqu Cm2RgtDwy5HXtmB6ue8WSPy444VPcO9gb7YUq06js3NF8ZN+eSqPfc+9sdsJsn4TWGQv KzmtCQwlsqhCzueF8qayyWobgOe/a0przMOSAH/AmKUkwem6JeiOeu16rwp5kes300D9 FkOQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=DBICTo6I; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id 10-20020a63124a000000b0053f163363c0si3500550pgs.95.2023.07.12.16.12.17; Wed, 12 Jul 2023 16:12:30 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=DBICTo6I; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232841AbjGLXCX (ORCPT + 99 others); Wed, 12 Jul 2023 19:02:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231461AbjGLXCI (ORCPT ); Wed, 12 Jul 2023 19:02:08 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7B5819B; Wed, 12 Jul 2023 16:02:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1689202926; x=1720738926; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=I7lZHiacZcvp7bKbGNbGwMPQS1s/EpOcXyFib1sY4o0=; b=DBICTo6IJ+C9g9UaUIyGtYk2G28gm5YT97MVsWZBkSh5HM+Mq1DyHFFx DCQD+ctJvrT3vP60cd+NZVNIDjMRgtwporF8egGsrYk/VGm1hLSScNMrQ rkh1peCMmUwwYKwjMKnZxY9ElA8yvBjlSBjwOw/dHbiyebdrfhyGCKHwL Ai3NkXdoIwvWMDr6c8W+VvNtpcxZymLm7UoCYrAbT+kLLNr0zASfgN3oR 0qhmqB5UqdXuEd4JQY7MM/TLPm6zsdJtSb+dWyfWnNal3NHmE7jjGUdmc bRjTvGALwCHzzVXxhPCzF64uVB5YDmOcMVAZ248dEysnGfR96eCbkj5j8 w==; X-IronPort-AV: E=McAfee;i="6600,9927,10769"; a="428773872" X-IronPort-AV: E=Sophos;i="6.01,200,1684825200"; d="scan'208";a="428773872" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2023 16:02:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10769"; a="835338589" X-IronPort-AV: E=Sophos;i="6.01,200,1684825200"; d="scan'208";a="835338589" Received: from b4969161e530.jf.intel.com ([10.165.56.46]) by fmsmga002.fm.intel.com with ESMTP; 12 Jul 2023 16:02:04 -0700 From: Haitao Huang To: jarkko@kernel.org, dave.hansen@linux.intel.com, tj@kernel.org, linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org, cgroups@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" Cc: kai.huang@intel.com, reinette.chatre@intel.com, Kristen Carlson Accardi , zhiquan1.li@intel.com, seanjc@google.com Subject: [PATCH v3 03/28] x86/sgx: Add 'struct sgx_epc_lru_lists' to encapsulate lru list(s) Date: Wed, 12 Jul 2023 16:01:37 -0700 Message-Id: <20230712230202.47929-4-haitao.huang@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230712230202.47929-1-haitao.huang@linux.intel.com> References: <20230712230202.47929-1-haitao.huang@linux.intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1771258302584221217 X-GMAIL-MSGID: 1771258302584221217 From: Kristen Carlson Accardi Introduce a data structure to wrap the existing reclaimable list and its spinlock in a struct to minimize the code changes needed to handle multiple LRUs as well as reclaimable and non-reclaimable lists. The new structure will be used in a following set of patches to implement SGX EPC cgroups. The changes to the structure needed for unreclaimable lists will be added in later patches. Signed-off-by: Sean Christopherson Signed-off-by: Kristen Carlson Accardi Signed-off-by: Haitao Huang Cc: Sean Christopherson V3: Removed the helper functions and revised commit messages --- arch/x86/kernel/cpu/sgx/sgx.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h index f6e3c5810eef..77fceba73a25 100644 --- a/arch/x86/kernel/cpu/sgx/sgx.h +++ b/arch/x86/kernel/cpu/sgx/sgx.h @@ -92,6 +92,23 @@ static inline void *sgx_get_epc_virt_addr(struct sgx_epc_page *page) return section->virt_addr + index * PAGE_SIZE; } +/* + * This data structure wraps a list of reclaimable EPC pages, and a list of + * non-reclaimable EPC pages and is used to implement a LRU policy during + * reclamation. + */ +struct sgx_epc_lru_lists { + /* Must acquire this lock to access */ + spinlock_t lock; + struct list_head reclaimable; +}; + +static inline void sgx_lru_init(struct sgx_epc_lru_lists *lrus) +{ + spin_lock_init(&lrus->lock); + INIT_LIST_HEAD(&lrus->reclaimable); +} + struct sgx_epc_page *__sgx_alloc_epc_page(void); void sgx_free_epc_page(struct sgx_epc_page *page);