From patchwork Fri Dec 2 18:36:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kristen Carlson Accardi X-Patchwork-Id: 13063107 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 2F0B1C4332F for ; Fri, 2 Dec 2022 18:38:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234504AbiLBSig (ORCPT ); Fri, 2 Dec 2022 13:38:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234585AbiLBShy (ORCPT ); Fri, 2 Dec 2022 13:37:54 -0500 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E3DDCED687; Fri, 2 Dec 2022 10:37:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1670006247; x=1701542247; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=u7MsvLTiIZvWWxFFWya637LlOY9eT/xkcvSR43Ixrm0=; b=l98QrOd6Zc3kV9pp1e/Y5UDr88q5aOK6i7f0g22DPKMNnUnZO+Sl7Wxt 6fn40zakseUtk0fAs5xblVWio3zuE/Uvq5k7HJr/KXfuFDFicahmpC9aw ijJeAxjf3T8ZuwfhTnu9T4kplj5kgEFBgyehEmU0AuHzl9AwL1GzomRIt xm1r2+Duohts2bkQaOnWEVBIqpMCme6NxZTJd+MfHXUIL8+gNSG5eB4S1 oLIEy5ChH6S0vkt+Y1m57js+gljza/QtMVOvHKw27ZRuNg5+VVI0Eb8Ns FYpqxspTEBU75SMIeCd1YAku84toeAGpzNCyh6LZuM9BRckcZQFefrXFv Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10549"; a="314724635" X-IronPort-AV: E=Sophos;i="5.96,213,1665471600"; d="scan'208";a="314724635" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Dec 2022 10:37:27 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10549"; a="713717549" X-IronPort-AV: E=Sophos;i="5.96,213,1665471600"; d="scan'208";a="713717549" Received: from kcaskeyx-mobl1.amr.corp.intel.com (HELO kcaccard-desk.amr.corp.intel.com) ([10.251.1.207]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Dec 2022 10:37:26 -0800 From: Kristen Carlson Accardi 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: zhiquan1.li@intel.com, Kristen Carlson Accardi , Sean Christopherson Subject: [PATCH v2 12/18] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup Date: Fri, 2 Dec 2022 10:36:48 -0800 Message-Id: <20221202183655.3767674-13-kristen@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221202183655.3767674-1-kristen@linux.intel.com> References: <20221202183655.3767674-1-kristen@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org From: Sean Christopherson Expose the top-level reclaim function as sgx_reclaim_epc_pages() for use by the upcoming EPC cgroup, which will initiate reclaim to enforce changes to high/max limits. Signed-off-by: Sean Christopherson Signed-off-by: Kristen Carlson Accardi Cc: Sean Christopherson --- arch/x86/kernel/cpu/sgx/main.c | 7 ++++--- arch/x86/kernel/cpu/sgx/sgx.h | 1 + 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c index 96399e2016a8..c947b4ae06f3 100644 --- a/arch/x86/kernel/cpu/sgx/main.c +++ b/arch/x86/kernel/cpu/sgx/main.c @@ -281,6 +281,7 @@ static void sgx_reclaimer_write(struct sgx_epc_page *epc_page, /** * sgx_reclaim_pages() - Reclaim EPC pages from the consumers + * sgx_reclaim_epc_pages() - Reclaim EPC pages from the consumers * @nr_to_scan: Number of EPC pages to scan for reclaim * @ignore_age: Reclaim a page even if it is young * @@ -385,7 +386,7 @@ static int __sgx_reclaim_pages(int nr_to_scan, bool ignore_age) return i; } -static int sgx_reclaim_pages(int nr_to_scan, bool ignore_age) +int sgx_reclaim_epc_pages(int nr_to_scan, bool ignore_age) { int ret; @@ -441,7 +442,7 @@ static int ksgxd(void *p) sgx_should_reclaim(SGX_NR_HIGH_PAGES)); if (sgx_should_reclaim(SGX_NR_HIGH_PAGES)) - sgx_reclaim_pages(SGX_NR_TO_SCAN, false); + sgx_reclaim_epc_pages(SGX_NR_TO_SCAN, false); } return 0; @@ -624,7 +625,7 @@ struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim) break; } - sgx_reclaim_pages(SGX_NR_TO_SCAN, false); + sgx_reclaim_epc_pages(SGX_NR_TO_SCAN, false); } if (sgx_should_reclaim(SGX_NR_LOW_PAGES)) diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h index ec8d567cd975..ce859331ddf5 100644 --- a/arch/x86/kernel/cpu/sgx/sgx.h +++ b/arch/x86/kernel/cpu/sgx/sgx.h @@ -206,6 +206,7 @@ void sgx_reclaim_direct(void); void sgx_record_epc_page(struct sgx_epc_page *page, unsigned long flags); int sgx_drop_epc_page(struct sgx_epc_page *page); struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim); +int sgx_reclaim_epc_pages(int nr_to_scan, bool ignore_age); void sgx_ipi_cb(void *info);