From patchwork Fri Aug 4 03:08:44 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Sun X-Patchwork-Id: 9880363 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 7DC04603F4 for ; Fri, 4 Aug 2017 03:26:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7674F28949 for ; Fri, 4 Aug 2017 03:26:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6B2A628987; Fri, 4 Aug 2017 03:26:36 +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 26E6F28949 for ; Fri, 4 Aug 2017 03:26:34 +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 1ddTDk-0005af-Oy; Fri, 04 Aug 2017 03:24:16 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ddTDj-0005aX-Rx for xen-devel@lists.xenproject.org; Fri, 04 Aug 2017 03:24:15 +0000 Received: from [193.109.254.147] by server-3.bemta-6.messagelabs.com id 3C/10-03044-FD8E3895; Fri, 04 Aug 2017 03:24:15 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrBLMWRWlGSWpSXmKPExsXS1tYhoXvvRXO kwYetihbft0xmcmD0OPzhCksAYxRrZl5SfkUCa8aP7adZC+47Vzy9sImpgbHdqIuRi0NIYDqj xMaW5cxdjJwcEgK8EkeWzWCFsAMkJnw5yQ5R1MAo8fznfHaQBJuAusTjrz1MILaIgJLEvVWTg WwODmYBS4kHU7NAwsICvhJ9t6exg4RZBFQl7k9IAzF5BTwkFm7yh5guJ3Hy2GSwTZwCnhKv+5 4zgthCQCU/NjYzTmDkXcDIsIpRozi1qCy1SNfQQi+pKDM9oyQ3MTNH19DATC83tbg4MT01JzG pWC85P3cTIzAUGIBgB+PNjQGHGCU5mJREeauPNUUK8SXlp1RmJBZnxBeV5qQWH2KU4eBQkuAt fd4cKSRYlJqeWpGWmQMMSpi0BAePkgjv/2dAad7igsTc4sx0iNQpRl2OVxP+f2MSYsnLz0uVE ucNBZkhAFKUUZoHNwIWIZcYZaWEeRmBjhLiKUgtys0sQZV/xSjOwagkDHEJT2ZeCdymV0BHMA Ed8aeuEeSIkkSElFQDozTbdmu5dapF332/agVv2KfJo5HVdz/QTflBXXjrw+bdFfFbp+kXiU3 ambT2gXNM7OflSoevbInVLb3B9PzvS3W5B3/CvLUmfvkhO8f+Y+QMzol3+U5cOvF9dRbbjAcm t/rz7vyYbnim8rdCycGf0dNsP1YXPgy1fJhovyPgy5oDofqBGkIyU5VYijMSDbWYi4oTAZXfM qmLAgAA X-Env-Sender: yi.y.sun@linux.intel.com X-Msg-Ref: server-7.tower-27.messagelabs.com!1501817052!105693264!1 X-Originating-IP: [134.134.136.24] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTM0LjEzNC4xMzYuMjQgPT4gMzkwOTcx\n X-StarScan-Received: X-StarScan-Version: 9.4.25; banners=-,-,- X-VirusChecked: Checked Received: (qmail 38626 invoked from network); 4 Aug 2017 03:24:14 -0000 Received: from mga09.intel.com (HELO mga09.intel.com) (134.134.136.24) by server-7.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 4 Aug 2017 03:24:14 -0000 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Aug 2017 20:24:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.41,319,1498546800"; d="scan'208"; a="1202049847" Received: from vmmmba-s2600wft.bj.intel.com ([10.240.193.80]) by fmsmga002.fm.intel.com with ESMTP; 03 Aug 2017 20:24:10 -0700 From: Yi Sun To: xen-devel@lists.xenproject.org Date: Fri, 4 Aug 2017 11:08:44 +0800 Message-Id: <1501816124-95652-1-git-send-email-yi.y.sun@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1501577334-7431-14-git-send-email-yi.y.sun@linux.intel.com> References: <1501577334-7431-14-git-send-email-yi.y.sun@linux.intel.com> Cc: Yi Sun , jbeulich@suse.com Subject: [Xen-devel] [PATCH v15.2 13/23] x86: refactor psr: CDP: implement CPU init flow. 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 flow for CDP. The flow is almost same as L3 CAT. Signed-off-by: Yi Sun --- v15: - refine process in 'psr_cpu_init' to remove the 'goto' and merge two if()s. (suggested by Jan Beulich) v14: - remove the 'Notes' in commit message because a stub function is implemented to avoid potential issue. (suggested by Jan Beulich) - remove 'feat_l3_cdp' because it can be replaced by 'feat_l3'. (suggested by Jan Beulich) - implement stub callback functions for CDP to avoid system crash if not full CDP patches applied. (suggested by Jan Beulich) - directly assign correct value to 'alt_type' of CDP. (suggested by Jan Beulich) - goto L3 CAT init process if CDP init fails. (suggested by Jan Beulich) v13: - add commit message. (suggested by Jan Beulich) - fix comment issue. (suggested by Jan Beulich) - set CDP default value before enabling it. (suggested by Jan Beulich) - remove unnecessary check. (suggested by Jan Beulich) - set 'alt_type' for CDP. (suggested by Jan Beulich) - check 'cos_max' and substract 1 before right shift it to get correct value. (suggested by Jan Beulich) v12: - move 'type[]' assignment into l3_cdp_props declaration to make it be 'const'. (suggested by Jan Beulich) - remove "L2 CAT" indication in printk. (suggested by Jan Beulich) - fix coding style issue. (suggested by Jan Beulich) - change 'val' type to uint64_t. (suggested by Jan Beulich) - use 1ull. (suggested by Jan Beulich) - restore mask(0) MSR to default value. (suggested by Jan Beulich) v11: - changes about 'feat_props'. (suggested by Jan Beulich) - remove MSR restore action which is unnecessary. (suggested by Jan Beulich) - modify commit message. v10: - fix comment. (suggested by Jan Beulich) - use swith in 'cat_init_feature' to handle different feature types. (suggested by Jan Beulich) - changes about 'props'. (suggested by Jan Beulich) - restore MSRs to default value when cpu online. (suggested by Jan Beulich) - remove feat_mask. (suggested by Jan Beulich) v9: - modify commit message to describe flow clearer. - handle cpu offline and online again case to read MSRs registers values back and save them into cos array to make user can get real data. - modify error handling process in 'psr_cpu_prepare' to reduce redundant codes. - modify 'get_cdp_data' and 'get_cdp_code' to make them standard. (suggested by Roger Pau and Jan Beulich) - encapsulate CDP operations into 'cat_init_feature' to reduce redundant codes. (suggested by Roger Pau) - reuse 'cat_get_cos_max' for CDP. (suggested by Roger Pau) - handle 'PSR_CDP' in psr_presmp_init to make init work can be done when there is only 'psr=cdp' in cmdline. - remove unnecessary comment. (suggested by Jan Beulich) - move CDP related codes in 'cpu_init_work' into 'psr_cpu_init'. (suggested by Jan Beulich) - add codes to handle CDP's 'cos_num'. (suggested by Jan Beulich) - fix coding style issue. (suggested by Jan Beulich) - do not free resources when allocation fails in 'psr_cpu_prepare'. (suggested by Jan Beulich) - changes about 'uint64_t' to 'uint32_t'. (suggested by Jan Beulich) v7: - initialize 'l3_cdp'. (suggested by Konrad Rzeszutek Wilk) v6: - use 'cpuid_leaf'. (suggested by Konrad Rzeszutek Wilk and Jan Beulich) v5: - remove codes to free 'feat_l3_cdp' in 'free_feature'. (suggested by Jan Beulich) - encapsulate cpuid registers into 'struct cpuid_leaf_regs'. (suggested by Jan Beulich) - print socket info when 'opt_cpu_info' is true. (suggested by Jan Beulich) - rename 'l3_cdp_get_max_cos_max' to 'l3_cdp_get_cos_max'. (suggested by Jan Beulich) - rename 'dat[]' to 'data[]'. (suggested by Jan Beulich) - move 'cpu_prepare_work' contents into 'psr_cpu_prepare'. (suggested by Jan Beulich) v4: - create this patch to make codes easier to understand. (suggested by Jan Beulich) --- xen/arch/x86/psr.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 75 insertions(+), 6 deletions(-) diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c index ce5b5b8..c2586af 100644 --- a/xen/arch/x86/psr.c +++ b/xen/arch/x86/psr.c @@ -62,6 +62,7 @@ enum psr_feat_type { FEAT_TYPE_L3_CAT, + FEAT_TYPE_L3_CDP, FEAT_TYPE_NUM, FEAT_TYPE_UNKNOWN, }; @@ -163,6 +164,22 @@ static struct feat_node *feat_l3; #define cat_default_val(len) (0xffffffff >> (32 - (len))) /* + * get_cdp_data - get DATA COS register value from input COS ID. + * @feat: the feature node. + * @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 node. + * @cos: the COS ID. + */ +#define get_cdp_code(feat, cos) \ + ((feat)->cos_reg_val[(cos) * 2 + 1]) + +/* * Use this function to check if any allocation feature has been enabled * in cmdline. */ @@ -262,6 +279,29 @@ static int cat_init_feature(const struct cpuid_leaf *regs, break; + case FEAT_TYPE_L3_CDP: + { + uint64_t val; + + if ( feat->cos_max < 3 ) + return -ENOENT; + + /* Cut half of cos_max when CDP is enabled. */ + feat->cos_max = (feat->cos_max - 1) >> 1; + + /* We reserve cos=0 as default cbm (all bits within cbm_len are 1). */ + get_cdp_code(feat, 0) = cat_default_val(feat->cbm_len); + get_cdp_data(feat, 0) = cat_default_val(feat->cbm_len); + + wrmsrl(MSR_IA32_PSR_L3_MASK(0), cat_default_val(feat->cbm_len)); + wrmsrl(MSR_IA32_PSR_L3_MASK(1), cat_default_val(feat->cbm_len)); + rdmsrl(MSR_IA32_PSR_L3_QOS_CFG, val); + wrmsrl(MSR_IA32_PSR_L3_QOS_CFG, + val | (1ull << PSR_L3_QOS_CDP_ENABLE_BIT)); + + break; + } + default: return -ENOENT; } @@ -272,7 +312,8 @@ static int cat_init_feature(const struct cpuid_leaf *regs, if ( !opt_cpu_info ) return 0; - printk(XENLOG_INFO "CAT: enabled on socket %u, cos_max:%u, cbm_len:%u\n", + printk(XENLOG_INFO "%s: enabled on socket %u, cos_max:%u, cbm_len:%u\n", + ((type == FEAT_TYPE_L3_CDP) ? "L3 CDP" : "L3 CAT"), cpu_to_socket(smp_processor_id()), feat->cos_max, feat->cbm_len); return 0; @@ -305,6 +346,26 @@ static const struct feat_props l3_cat_props = { .write_msr = l3_cat_write_msr, }; +/* L3 CDP props */ +static bool l3_cdp_get_feat_info(const struct feat_node *feat, + uint32_t data[], uint32_t array_len) +{ + return false; +} + +static void l3_cdp_write_msr(unsigned int cos, uint32_t val, enum cbm_type type) +{ +} + +static const struct feat_props l3_cdp_props = { + .cos_num = 2, + .type[0] = PSR_CBM_TYPE_L3_DATA, + .type[1] = PSR_CBM_TYPE_L3_CODE, + .alt_type = PSR_CBM_TYPE_L3, + .get_feat_info = l3_cdp_get_feat_info, + .write_msr = l3_cdp_write_msr, +}; + static void __init parse_psr_bool(char *s, char *value, char *feature, unsigned int mask) { @@ -1281,10 +1342,18 @@ static void psr_cpu_init(void) feat = feat_l3; feat_l3 = NULL; - if ( !cat_init_feature(®s, feat, info, FEAT_TYPE_L3_CAT) ) - feat_props[FEAT_TYPE_L3_CAT] = &l3_cat_props; - else - feat_l3 = feat; + /* If CDP init fails, try to work as L3 CAT. */ + if ( (regs.c & PSR_CAT_CDP_CAPABILITY) && (opt_psr & PSR_CDP) && + !cat_init_feature(®s, feat, info, FEAT_TYPE_L3_CDP) ) + feat_props[FEAT_TYPE_L3_CDP] = &l3_cdp_props; + + if ( !feat_props[FEAT_TYPE_L3_CDP] ) + { + if ( !cat_init_feature(®s, feat, info, FEAT_TYPE_L3_CAT) ) + feat_props[FEAT_TYPE_L3_CAT] = &l3_cat_props; + else + feat_l3 = feat; + } } info->feat_init = true; @@ -1346,7 +1415,7 @@ static int __init psr_presmp_init(void) if ( (opt_psr & PSR_CMT) && opt_rmid_max ) init_psr_cmt(opt_rmid_max); - if ( opt_psr & PSR_CAT ) + if ( opt_psr & (PSR_CAT | PSR_CDP) ) init_psr(); if ( psr_cpu_prepare() )