From patchwork Wed May 3 08:44:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Sun X-Patchwork-Id: 9709007 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 73F6860385 for ; Wed, 3 May 2017 08:56:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 54E8C28604 for ; Wed, 3 May 2017 08:56:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4832C28609; Wed, 3 May 2017 08:56:24 +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 A501328604 for ; Wed, 3 May 2017 08:56:23 +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 1d5q2r-0000aM-PB; Wed, 03 May 2017 08:54:01 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1d5q2q-0000Yp-02 for xen-devel@lists.xenproject.org; Wed, 03 May 2017 08:54:00 +0000 Received: from [85.158.139.211] by server-15.bemta-5.messagelabs.com id 62/DE-01730-7AA99095; Wed, 03 May 2017 08:53:59 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrLLMWRWlGSWpSXmKPExsXS1tYhobtsFme kQcdKbYvvWyYzOTB6HP5whSWAMYo1My8pvyKBNWN1A2fBaZeKXbd3sTUwvjHsYuTiEBKYzihx edFbli5GTg4JAV6JI8tmsHYxcgDZ/hLtN6shahoYJT4vvcIGUsMmoC7x+GsPE4gtIqAkcW/VZ CaQImaBnUwS605/ZwZJCAM1P3q0GcxmEVCVWLF1OtgCXgEPiTs/LjFDLJOTOHlsMiuIzSngKf H8y0Z2EFsIqObQs/dMExh5FzAyrGJUL04tKkst0jXWSyrKTM8oyU3MzNE1NDDVy00tLk5MT81 JTCrWS87P3cQIDAYGINjBuPef0yFGSQ4mJVFe9VfskUJ8SfkplRmJxRnxRaU5qcWHGGU4OJQk eB/O5IwUEixKTU+tSMvMAYYlTFqCg0dJhLcLJM1bXJCYW5yZDpE6xagoJc47HSQhAJLIKM2Da 4PFwiVGWSlhXkagQ4R4ClKLcjNLUOVfMYpzMCoJ8yaDTOHJzCuBm/4KaDET0OJmWQ6QxSWJCC mpBsbKt7qc67b3ftuetvXWqRUTuXuvxhkXTM8WrZNdHnug5+pPJ544KQWD2UtT3+d6iIidETy 0/nTRvs0lh1OKDAM/N3+dt+P69kBZL72GCX/l+60WNhyw8rC4kl7CWJ0wvy9rVf/twEjxr1mP +w99M1Q6Ky6r4MvyOHhFZa+TXGIDg/76BYz5dkosxRmJhlrMRcWJAFyzGaKAAgAA X-Env-Sender: yi.y.sun@linux.intel.com X-Msg-Ref: server-2.tower-206.messagelabs.com!1493801620!75519330!8 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: 9.4.12; banners=-,-,- X-VirusChecked: Checked Received: (qmail 8622 invoked from network); 3 May 2017 08:53:58 -0000 Received: from mga09.intel.com (HELO mga09.intel.com) (134.134.136.24) by server-2.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 3 May 2017 08:53:58 -0000 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 May 2017 01:53:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,283,1491289200"; d="scan'208";a="852347566" Received: from vmmmba-s2600wft.bj.intel.com ([10.240.193.39]) by FMSMGA003.fm.intel.com with ESMTP; 03 May 2017 01:53:55 -0700 From: Yi Sun To: xen-devel@lists.xenproject.org Date: Wed, 3 May 2017 16:44:07 +0800 Message-Id: <1493801063-38513-8-git-send-email-yi.y.sun@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1493801063-38513-1-git-send-email-yi.y.sun@linux.intel.com> References: <1493801063-38513-1-git-send-email-yi.y.sun@linux.intel.com> Cc: kevin.tian@intel.com, wei.liu2@citrix.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, roger.pau@citrix.com Subject: [Xen-devel] [PATCH v11 07/23] x86: refactor psr: L3 CAT: implement get value 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 There is an interface in user space to show feature value of domains. This patch implements get value flow in hypervisor. It also changes domctl interface to make it more general. With this patch, 'psr-cat-show' can work for L3 CAT but not for L3 code/data which is implemented in CDP related patches. Signed-off-by: Yi Sun --- v11: - declare a 'switch()' wide variable 'val32' in domctl. (suggested by Jan Beulich) - remove 'get_val' callback function which is replaced by generic codes. (suggested by Jan Beulich) - fix coding style issue. (suggested by Jan Beulich) - do not 'ASSERT' domain pointer. (suggested by Jan Beulich) - modify commit message. v10: - use an intermediate variable to get value and avoid cast in domctl. (suggested by Jan Beulich) - remove 'type' in 'get_val' parameters and will add it back when implementing CDP. (suggested by Jan Beulich) - remove unnecessary variable and return error about 'info' in 'psr_get_feat'. (suggested by Jan Beulich) - use 'ASSERT' to check input parameter in 'psr_get_val'. (suggested by Jan Beulich) - changes about 'feat_props'. (suggested by Jan Beulich) v9: - add commit message to explain there is an user space interface. - rename 'l3_cat_get_val' to 'cat_get_val' to cover all L3/L2 CAT features. (suggested by Roger Pau) - replace feature list handling to feature array handling. (suggested by Roger Pau) - change parameter of 'psr_get'. Use 'psr_cos_ids' directly to replace domain. Also declare it to 'const'. (suggested by Jan Beulich) - change code flow to remove 'psr_get' but add 'psr_get_feat' to make codes more reasonable. (suggested by Jan Beulich) - modify patch title to indicate 'L3 CAT'. (suggested by Jan Beulich) - move cos check into common function because this check is required by all features. (suggested by Jan Beulich) - fix coding style issue. (suggested by Jan Beulich) - changes about 'uint64_t' to 'uint32_t'. (suggested by Jan Beulich) v7: - rename '__psr_get' to 'psr_get'. (suggested by Wei Liu) v6: - modify commit message to make it clearer. (suggested by Konrad Rzeszutek Wilk) - remove one extra space in code. (suggested by Konrad Rzeszutek Wilk) - remove unnecessary comment. (suggested by Konrad Rzeszutek Wilk) - write a helper function to move get info and get val functions into it. Because most codes of 'get_info' and 'get_val' are same. (suggested by Konrad Rzeszutek Wilk) v5: - rename 'dat[]' to 'data[]' (suggested by Jan Beulich) - modify variables names to make them better, e.g. 'feat_tmp' to 'feat'. (suggested by Jan Beulich) - check if feature type match in caller of feature callback function. (suggested by Jan Beulich) v4: - create this patch to make codes easier to understand. (suggested by Jan Beulich) --- xen/arch/x86/domctl.c | 20 +++++++++------- xen/arch/x86/psr.c | 60 +++++++++++++++++++++++++++++++++++++++-------- xen/include/asm-x86/psr.h | 4 ++-- 3 files changed, 63 insertions(+), 21 deletions(-) diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c index 1220224..5b62c5c 100644 --- a/xen/arch/x86/domctl.c +++ b/xen/arch/x86/domctl.c @@ -1408,6 +1408,8 @@ long arch_do_domctl( case XEN_DOMCTL_psr_cat_op: switch ( domctl->u.psr_cat_op.cmd ) { + uint32_t val32; + case XEN_DOMCTL_PSR_CAT_OP_SET_L3_CBM: ret = psr_set_l3_cbm(d, domctl->u.psr_cat_op.target, domctl->u.psr_cat_op.data, @@ -1427,23 +1429,23 @@ long arch_do_domctl( break; case XEN_DOMCTL_PSR_CAT_OP_GET_L3_CBM: - ret = psr_get_l3_cbm(d, domctl->u.psr_cat_op.target, - &domctl->u.psr_cat_op.data, - PSR_CBM_TYPE_L3); + ret = psr_get_val(d, domctl->u.psr_cat_op.target, + &val32, PSR_CBM_TYPE_L3); + domctl->u.psr_cat_op.data = val32; copyback = 1; break; case XEN_DOMCTL_PSR_CAT_OP_GET_L3_CODE: - ret = psr_get_l3_cbm(d, domctl->u.psr_cat_op.target, - &domctl->u.psr_cat_op.data, - PSR_CBM_TYPE_L3_CODE); + ret = psr_get_val(d, domctl->u.psr_cat_op.target, + &val32, PSR_CBM_TYPE_L3_CODE); + domctl->u.psr_cat_op.data = val32; copyback = 1; break; case XEN_DOMCTL_PSR_CAT_OP_GET_L3_DATA: - ret = psr_get_l3_cbm(d, domctl->u.psr_cat_op.target, - &domctl->u.psr_cat_op.data, - PSR_CBM_TYPE_L3_DATA); + ret = psr_get_val(d, domctl->u.psr_cat_op.target, + &val32, PSR_CBM_TYPE_L3_DATA); + domctl->u.psr_cat_op.data = val32; copyback = 1; break; diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c index 2e6595d..1b781e1 100644 --- a/xen/arch/x86/psr.c +++ b/xen/arch/x86/psr.c @@ -476,23 +476,34 @@ static struct psr_socket_info *get_socket_info(unsigned int socket) return socket_info + socket; } +static struct feat_node *psr_get_feat_and_type(unsigned int socket, + enum cbm_type type, + enum psr_feat_type *feat_type) +{ + const struct psr_socket_info *info = get_socket_info(socket); + + if ( IS_ERR(info) ) + return ERR_PTR(PTR_ERR(info)); + + *feat_type = psr_cbm_type_to_feat_type(type); + if ( *feat_type >= ARRAY_SIZE(info->features) ) + return NULL; + + return info->features[*feat_type]; +} + int psr_get_info(unsigned int socket, enum cbm_type type, uint32_t data[], unsigned int array_len) { - const struct psr_socket_info *info = get_socket_info(socket); const struct feat_node *feat; enum psr_feat_type feat_type; ASSERT(data); - if ( IS_ERR(info) ) - return PTR_ERR(info); - - feat_type = psr_cbm_type_to_feat_type(type); - if ( feat_type >= ARRAY_SIZE(info->features) ) - return -ENOENT; + feat = psr_get_feat_and_type(socket, type, &feat_type); + if ( IS_ERR(feat) ) + return PTR_ERR(feat); - feat = info->features[feat_type]; if ( !feat || !feat_props[feat_type] ) return -ENOENT; @@ -502,9 +513,38 @@ int psr_get_info(unsigned int socket, enum cbm_type type, return -EINVAL; } -int psr_get_l3_cbm(struct domain *d, unsigned int socket, - uint64_t *cbm, enum cbm_type type) +int psr_get_val(struct domain *d, unsigned int socket, + uint32_t *val, enum cbm_type type) { + const struct feat_node *feat; + enum psr_feat_type feat_type; + unsigned int cos, i; + + ASSERT(val); + + feat = psr_get_feat_and_type(socket, type, &feat_type); + if ( IS_ERR(feat) ) + return PTR_ERR(feat); + + if ( !feat || !feat_props[feat_type] ) + return -ENOENT; + + cos = d->arch.psr_cos_ids[socket]; + /* + * If input cos exceeds current feature's cos_max, we should return its + * default value which is stored in cos 0. This case only happens + * when more than two features enabled concurrently and at least one + * features's cos_max is bigger than others. When a domain's working cos + * id is bigger than some features' cos_max, HW automatically works as + * default value for those features which cos_max is smaller. + */ + if ( cos > feat->cos_max ) + cos = 0; + + for ( i = 0; i < feat_props[feat_type]->cos_num; i++ ) + if ( type == feat_props[feat_type]->type[i] ) + *val = feat->cos_reg_val[cos * feat_props[feat_type]->cos_num + i]; + return 0; } diff --git a/xen/include/asm-x86/psr.h b/xen/include/asm-x86/psr.h index af3a465..7c6d38a 100644 --- a/xen/include/asm-x86/psr.h +++ b/xen/include/asm-x86/psr.h @@ -71,8 +71,8 @@ void psr_ctxt_switch_to(struct domain *d); int psr_get_info(unsigned int socket, enum cbm_type type, uint32_t data[], unsigned int array_len); -int psr_get_l3_cbm(struct domain *d, unsigned int socket, - uint64_t *cbm, enum cbm_type type); +int psr_get_val(struct domain *d, unsigned int socket, + uint32_t *val, enum cbm_type type); int psr_set_l3_cbm(struct domain *d, unsigned int socket, uint64_t cbm, enum cbm_type type);