From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 888888BE0 for ; Thu, 17 Nov 2022 17:31:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668706283; x=1700242283; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=JtQf+wYmqZJM4WTnOnjVIvXY+Y6w+bPb1VhRTxHhJIo=; b=JD35rzMfFfnOsHtcMlCqqfhPbl5cUwAmm8OLPbePyZjKBegU78mMj1O1 neZgMkED2bs3/+QvIJpj0enGBM7rrJrcpYQleWhrvVbYh06D1wlhqqy6U GfM1fDaNqAP+jBcmiMscgrGbK6wXtmMwb3/vX6Wcz1Rq35zeicqilOX3y wupFd1tSPTUoOgoHYstuiAdeQcK41pA9GoAKNhp+xqu2bA+xEQ9fBqN/O Yedgv2qzKzsa3Imy72ZOgbVYEO6tydfghJMEIbntRRdjDaG115OtLGTWE swLPnnC4JnJTADf/7stSJ8KcjRi2wY0wKIp+k9DdyyZdvcZDg9iYSbBgB Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10534"; a="377186531" X-IronPort-AV: E=Sophos;i="5.96,172,1665471600"; d="scan'208";a="377186531" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2022 09:31:22 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10534"; a="745632076" X-IronPort-AV: E=Sophos;i="5.96,172,1665471600"; d="scan'208";a="745632076" Received: from jithujos.sc.intel.com ([172.25.103.66]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2022 09:31:22 -0800 From: Jithu Joseph To: hdegoede@redhat.com, markgross@kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, gregkh@linuxfoundation.org, jithu.joseph@intel.com, ashok.raj@intel.com, tony.luck@intel.com, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, patches@lists.linux.dev, ravi.v.shankar@intel.com, thiago.macieira@intel.com, athenas.jimenez.gonzalez@intel.com, sohil.mehta@intel.com Subject: [PATCH v3 04/16] platform/x86/intel/ifs: Remove memory allocation from load path Date: Thu, 17 Nov 2022 09:29:58 -0800 Message-Id: <20221117172958.4172029-1-jithu.joseph@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <77e9d0f2-12d9-fc7a-2161-c579b7bbd673@redhat.com> References: <77e9d0f2-12d9-fc7a-2161-c579b7bbd673@redhat.com> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit IFS requires tests to be authenticated once for each CPU socket on a system. scan_chunks_sanity_check() was dynamically allocating memory to store the state of whether tests have been authenticated on each socket for every load operation. Move the memory allocation to init path and store the pointer in ifs_data struct. Reviewed-by: Tony Luck Suggested-by: Borislav Petkov Signed-off-by: Jithu Joseph --- - Replaced global pkg_auth pointer to struct ifs_data (Hans) - With this change there are conflicts in patches 11 and 12 (I will post the updated 11 and 12 if this is satisfactory) drivers/platform/x86/intel/ifs/ifs.h | 2 ++ drivers/platform/x86/intel/ifs/core.c | 12 ++++++++++-- drivers/platform/x86/intel/ifs/load.c | 14 ++++---------- 3 files changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h index 3ff1d9aaeaa9..8de1952a1b7b 100644 --- a/drivers/platform/x86/intel/ifs/ifs.h +++ b/drivers/platform/x86/intel/ifs/ifs.h @@ -191,6 +191,7 @@ union ifs_status { * struct ifs_data - attributes related to intel IFS driver * @integrity_cap_bit: MSR_INTEGRITY_CAPS bit enumerating this test * @loaded_version: stores the currently loaded ifs image version. + * @pkg_auth: array of bool storing per package auth status * @loaded: If a valid test binary has been loaded into the memory * @loading_error: Error occurred on another CPU while loading image * @valid_chunks: number of chunks which could be validated. @@ -199,6 +200,7 @@ union ifs_status { */ struct ifs_data { int integrity_cap_bit; + bool *pkg_auth; int loaded_version; bool loaded; bool loading_error; diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c index 5fb7f655c291..6980a31e9786 100644 --- a/drivers/platform/x86/intel/ifs/core.c +++ b/drivers/platform/x86/intel/ifs/core.c @@ -4,6 +4,7 @@ #include #include #include +#include #include @@ -51,8 +52,14 @@ static int __init ifs_init(void) ifs_device.misc.groups = ifs_get_groups(); if ((msrval & BIT(ifs_device.data.integrity_cap_bit)) && - !misc_register(&ifs_device.misc)) - return 0; + !misc_register(&ifs_device.misc)) { + ifs_device.data.pkg_auth = kmalloc_array(topology_max_packages(), + sizeof(bool), GFP_KERNEL); + if (!ifs_device.data.pkg_auth) + return -ENOMEM; + else + return 0; + } return -ENODEV; } @@ -60,6 +67,7 @@ static int __init ifs_init(void) static void __exit ifs_exit(void) { misc_deregister(&ifs_device.misc); + kfree(ifs_device.data.pkg_auth); } module_init(ifs_init); diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c index 89ce265887ea..8423c486d11b 100644 --- a/drivers/platform/x86/intel/ifs/load.c +++ b/drivers/platform/x86/intel/ifs/load.c @@ -3,7 +3,6 @@ #include #include -#include #include #include "ifs.h" @@ -118,16 +117,12 @@ static void copy_hashes_authenticate_chunks(struct work_struct *work) */ static int scan_chunks_sanity_check(struct device *dev) { - int metadata_size, curr_pkg, cpu, ret = -ENOMEM; + int metadata_size, curr_pkg, cpu, ret; struct ifs_data *ifsd = ifs_get_data(dev); - bool *package_authenticated; struct ifs_work local_work; char *test_ptr; - package_authenticated = kcalloc(topology_max_packages(), sizeof(bool), GFP_KERNEL); - if (!package_authenticated) - return ret; - + memset(ifsd->pkg_auth, 0, (topology_max_packages() * sizeof(bool))); metadata_size = ifs_header_ptr->metadata_size; /* Spec says that if the Meta Data Size = 0 then it should be treated as 2000 */ @@ -150,7 +145,7 @@ static int scan_chunks_sanity_check(struct device *dev) cpus_read_lock(); for_each_online_cpu(cpu) { curr_pkg = topology_physical_package_id(cpu); - if (package_authenticated[curr_pkg]) + if (ifsd->pkg_auth[curr_pkg]) continue; reinit_completion(&ifs_done); local_work.dev = dev; @@ -161,12 +156,11 @@ static int scan_chunks_sanity_check(struct device *dev) ret = -EIO; goto out; } - package_authenticated[curr_pkg] = 1; + ifsd->pkg_auth[curr_pkg] = 1; } ret = 0; out: cpus_read_unlock(); - kfree(package_authenticated); return ret; } -- 2.25.1