From patchwork Wed Jan 18 02:02:36 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Sun X-Patchwork-Id: 9522485 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 989B96043D for ; Wed, 18 Jan 2017 02:06:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8A5D628544 for ; Wed, 18 Jan 2017 02:06:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7F06428554; Wed, 18 Jan 2017 02:06:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1463728544 for ; Wed, 18 Jan 2017 02:06:51 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cTfc4-0005ud-7U; Wed, 18 Jan 2017 02:04:36 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cTfc2-0005le-6n for xen-devel@lists.xenproject.org; Wed, 18 Jan 2017 02:04:34 +0000 Received: from [85.158.137.68] by server-4.bemta-3.messagelabs.com id 6D/2F-01392-13DCE785; Wed, 18 Jan 2017 02:04:33 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrNLMWRWlGSWpSXmKPExsVywNykQtfwbF2 EwZzZAhbft0xmcmD0OPzhCksAYxRrZl5SfkUCa8auW20sBRNUK2a17WdqYFws3cXIySEkUCmx 6Pd/JhBbQoBX4siyGawQtp/ExqbZbF2MXEA1DYwStyc1sYAk2ATUJR5/7QFrEBFQkri3ajITS BGzQDeTxMqHW8GKhAXCJNav6wKbxCKgKvHk4wGwOK+Ah8Srl98YITbISZw8NhmshhMo3nt+Ni vERe4Sl06vZZvAyLuAkWEVo0ZxalFZapGukZFeUlFmekZJbmJmjq6hgbFebmpxcWJ6ak5iUrF ecn7uJkZgQNQzMDDuYJx6wu8QoyQHk5Iob8fj2gghvqT8lMqMxOKM+KLSnNTiQ4wyHBxKErz3 TtdFCAkWpaanVqRl5gBDEyYtwcGjJMJ7ASTNW1yQmFucmQ6ROsWoy/Fl55mXTEIsefl5qVLiv MdAigRAijJK8+BGwOLkEqOslDAvIwMDgxBPQWpRbmYJqvwrRnEORiVhXskzQFN4MvNK4Da9Aj qCCeiI6zrVIEeUJCKkpBoYDcrDdnzaWL597Tsn3cNXC0IVLh1geLyLz/DDnokx7A0uGZ8nuj1 v9TYR2dobtJ0v6Zr5F9EH68R+3a3V/7vMnNVts/bzY7kcU5f+1Hkd76Y2yaaaM+dTZULmh743 Up/kFvDmbti7jNPg4EeRny98DkYozeNaHrC/Q2J5Wb1PsV/CUoPsD4/klFiKMxINtZiLihMB0 bOV7Y4CAAA= X-Env-Sender: yi.y.sun@linux.intel.com X-Msg-Ref: server-8.tower-31.messagelabs.com!1484705037!81141171!14 X-Originating-IP: [192.55.52.120] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 16150 invoked from network); 18 Jan 2017 02:04:32 -0000 Received: from mga04.intel.com (HELO mga04.intel.com) (192.55.52.120) by server-8.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 18 Jan 2017 02:04:32 -0000 Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP; 17 Jan 2017 18:04:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,247,1477983600"; d="scan'208";a="54503376" Received: from vmmmba-s2600wft.bj.intel.com ([10.240.193.63]) by fmsmga005.fm.intel.com with ESMTP; 17 Jan 2017 18:04:27 -0800 From: Yi Sun To: xen-devel@lists.xenproject.org Date: Wed, 18 Jan 2017 10:02:36 +0800 Message-Id: <1484704967-5609-14-git-send-email-yi.y.sun@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1484704967-5609-1-git-send-email-yi.y.sun@linux.intel.com> References: <1484704967-5609-1-git-send-email-yi.y.sun@linux.intel.com> Cc: wei.liu2@citrix.com, konrad.wilk@oracle.com, andrew.cooper3@citrix.com, dario.faggioli@citrix.com, he.chen@linux.intel.com, ian.jackson@eu.citrix.com, Yi Sun , mengxu@cis.upenn.edu, jbeulich@suse.com, chao.p.peng@linux.intel.com Subject: [Xen-devel] [PATCH v5 13/24] x86: refactor psr: implement CPU init and free flow for CDP. X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch implements the CPU init and free flow for CDP including L3 CDP initialization callback function. Signed-off-by: Yi Sun --- xen/arch/x86/psr.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 93 insertions(+), 5 deletions(-) diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c index b8d3c82..a979128 100644 --- a/xen/arch/x86/psr.c +++ b/xen/arch/x86/psr.c @@ -93,6 +93,7 @@ struct psr_cat_hw_info { struct feat_hw_info { union { struct psr_cat_hw_info l3_cat_info; + struct psr_cat_hw_info l3_cdp_info; }; }; @@ -197,6 +198,21 @@ struct cpuid_leaf_regs { unsigned int ecx; unsigned int edx; }; +/* + * get_data - get DATA COS register value from input COS ID. + * @feat: the feature list entry. + * @cos: the COS ID. + */ +#define get_cdp_data(feat, cos) \ + ( feat->cos_reg_val[cos * 2] ) + +/* + * get_cdp_code - get CODE COS register value from input COS ID. + * @feat: the feature list entry. + * @cos: the COS ID. + */ +#define get_cdp_code(feat, cos) \ + ( feat->cos_reg_val[cos * 2 + 1] ) struct psr_assoc { uint64_t val; @@ -219,6 +235,7 @@ static DEFINE_PER_CPU(struct psr_assoc, psr_assoc); * inserted into feature list in cpu_init_work(). */ static struct feat_node *feat_l3_cat; +static struct feat_node *feat_l3_cdp; /* Common functions. */ static void free_feature(struct psr_socket_info *info) @@ -448,6 +465,61 @@ static const struct feat_ops l3_cat_ops = { .write_msr = l3_cat_write_msr, }; +/* L3 CDP functions implementation. */ +static void l3_cdp_init_feature(struct cpuid_leaf_regs regs, + struct feat_node *feat, + struct psr_socket_info *info) +{ + struct psr_cat_hw_info l3_cdp; + unsigned int socket; + uint64_t val; + + /* No valid value so do not enable feature. */ + if ( !regs.eax || !regs.edx ) + return; + + l3_cdp.cbm_len = (regs.eax & CAT_CBM_LEN_MASK) + 1; + /* Cut half of cos_max when CDP is enabled. */ + l3_cdp.cos_max = min(opt_cos_max, regs.edx & CAT_COS_MAX_MASK) >> 1; + + /* cos=0 is reserved as default cbm(all ones). */ + get_cdp_code(feat, 0) = + (1ull << l3_cdp.cbm_len) - 1; + get_cdp_data(feat, 0) = + (1ull << l3_cdp.cbm_len) - 1; + + /* We only write mask1 since mask0 is always all ones by default. */ + wrmsrl(MSR_IA32_PSR_L3_MASK(1), (1ull << l3_cdp.cbm_len) - 1); + rdmsrl(MSR_IA32_PSR_L3_QOS_CFG, val); + wrmsrl(MSR_IA32_PSR_L3_QOS_CFG, val | (1 << PSR_L3_QOS_CDP_ENABLE_BIT)); + + feat->feature = PSR_SOCKET_L3_CDP; + __set_bit(PSR_SOCKET_L3_CDP, &info->feat_mask); + + feat->info.l3_cdp_info = l3_cdp; + + info->nr_feat++; + + /* Add this feature into list. */ + list_add_tail(&feat->list, &info->feat_list); + + socket = cpu_to_socket(smp_processor_id()); + if ( opt_cpu_info ) + printk(XENLOG_INFO + "L3 CDP: enabled on socket %u, cos_max:%u, cbm_len:%u\n", + socket, feat->info.l3_cdp_info.cos_max, + feat->info.l3_cdp_info.cbm_len); +} + +static unsigned int l3_cdp_get_cos_max(const struct feat_node *feat) +{ + return feat->info.l3_cdp_info.cos_max; +} + +struct feat_ops l3_cdp_ops = { + .get_cos_max = l3_cdp_get_cos_max, +}; + static void __init parse_psr_bool(char *s, char *value, char *feature, unsigned int mask) { @@ -1207,11 +1279,19 @@ static void cpu_init_work(void) cpuid_count(PSR_CPUID_LEVEL_CAT, 1, ®s.eax, ®s.ebx, ®s.ecx, ®s.edx); - feat = feat_l3_cat; - feat_l3_cat = NULL; - feat->ops = l3_cat_ops; - - l3_cat_init_feature(regs, feat, info); + if ( (regs.ecx & PSR_CAT_CDP_CAPABILITY) && (opt_psr & PSR_CDP) && + !test_bit(PSR_SOCKET_L3_CDP, &info->feat_mask) ) + { + feat = feat_l3_cdp; + feat_l3_cdp = NULL; + feat->ops = l3_cdp_ops; + l3_cdp_init_feature(regs, feat, info); + } else { + feat = feat_l3_cat; + feat_l3_cat = NULL; + feat->ops = l3_cat_ops; + l3_cat_init_feature(regs, feat, info); + } } } @@ -1263,6 +1343,14 @@ static int psr_cpu_prepare(unsigned int cpu) (feat_l3_cat = xzalloc(struct feat_node)) == NULL ) return -ENOMEM; + if ( feat_l3_cdp == NULL && + (feat_l3_cdp = xzalloc(struct feat_node)) == NULL ) + { + xfree(feat_l3_cat); + feat_l3_cat = NULL; + return -ENOMEM; + } + return 0; }