From patchwork Thu Dec 3 18:19:32 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 552405 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id C1B7A1402C0 for ; Fri, 4 Dec 2015 05:19:49 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=sfs-ml-4.v29.ch3.sourceforge.com) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1a4YTp-0001JH-7q; Thu, 03 Dec 2015 18:19:45 +0000 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1a4YTn-0001J9-Vk for tpmdd-devel@lists.sourceforge.net; Thu, 03 Dec 2015 18:19:43 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of obsidianresearch.com designates 184.70.90.242 as permitted sender) client-ip=184.70.90.242; envelope-from=jgunthorpe@obsidianresearch.com; helo=quartz.orcorp.ca; Received: from quartz.orcorp.ca ([184.70.90.242]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:AES128-SHA:128) (Exim 4.76) id 1a4YTm-0007RL-Jo for tpmdd-devel@lists.sourceforge.net; Thu, 03 Dec 2015 18:19:43 +0000 Received: from [10.0.0.160] (helo=jggl.edm.orcorp.ca) by quartz.orcorp.ca with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84) (envelope-from ) id 1a4YTc-0007or-8l; Thu, 03 Dec 2015 11:19:32 -0700 Received: from jgg by jggl.edm.orcorp.ca with local (Exim 4.84) (envelope-from ) id 1a4YTc-0004Zt-5L; Thu, 03 Dec 2015 11:19:32 -0700 Date: Thu, 3 Dec 2015 11:19:32 -0700 From: Jason Gunthorpe To: Jarkko Sakkinen Message-ID: <20151203181932.GA22973@obsidianresearch.com> References: <1448996309-15220-1-git-send-email-jgunthorpe@obsidianresearch.com> <20151201213351.GC5071@intel.com> <20151202182726.GB30972@obsidianresearch.com> <20151202191155.GA2832@obsidianresearch.com> <20151203060042.GB10359@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20151203060042.GB10359@intel.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Broken-Reverse-DNS: no host name found for IP address 10.0.0.160 X-Spam-Score: -1.1 (-) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.5 AWL AWL: Adjusted score from AWL reputation of From: address X-Headers-End: 1a4YTm-0007RL-Jo Cc: Martin Wilck , tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= Subject: Re: [tpmdd-devel] [PATCH v2 0/3] tpm_tis: Clean up force module parameter X-BeenThere: tpmdd-devel@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Tpm Device Driver maintainance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tpmdd-devel-bounces@lists.sourceforge.net On Thu, Dec 03, 2015 at 08:00:42AM +0200, Jarkko Sakkinen wrote: > I guess it'd be more realiable. In my NUC the current fix works and the > people who tested it. If you supply me a fix that changes it to use that > I can test it and this will give also coverage to the people who tested > my original fix. Here is the updated series: https://github.com/jgunthorpe/linux/commits/for-jarkko What does your dmesg say? It really isn't OK to hardwire an address for acpi devices, so I've added something like this. Just completely guessing that control_pa is where the BIOS is hiding the base address. Maybe it is cca->cmd_pa ? >From c9f7c0465008657f7fc7880496f68f4a1b3b4a26 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Thu, 3 Dec 2015 10:58:56 -0700 Subject: [PATCH 3/5] tpm_tis: Do not fall back to a hardcoded address for TPM2 If the ACPI tables do not declare a memory resource for the TPM2 then do not just fall back to the x86 default base address. WIP: Guess that the control_address is the base address for the TIS 1.2 memory mapped interface. Signed-off-by: Jason Gunthorpe --- drivers/char/tpm/tpm_tis.c | 50 +++++++++++++++++++--------------------------- 1 file changed, 20 insertions(+), 30 deletions(-) diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index fecd27b45fd1..6b28f8003425 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -122,39 +122,11 @@ static inline int is_itpm(struct acpi_device *dev) { return has_hid(dev, "INTC0102"); } - -static inline int is_fifo(struct acpi_device *dev) -{ - struct acpi_table_tpm2 *tbl; - acpi_status st; - - /* TPM 1.2 FIFO */ - if (!has_hid(dev, "MSFT0101")) - return 1; - - st = acpi_get_table(ACPI_SIG_TPM2, 1, - (struct acpi_table_header **) &tbl); - if (ACPI_FAILURE(st)) { - dev_err(&dev->dev, "failed to get TPM2 ACPI table\n"); - return 0; - } - - if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED) - return 0; - - /* TPM 2.0 FIFO */ - return 1; -} #else static inline int is_itpm(struct acpi_device *dev) { return 0; } - -static inline int is_fifo(struct acpi_device *dev) -{ - return 1; -} #endif /* Before we attempt to access the TPM we must see that the valid bit is set. @@ -980,11 +952,21 @@ static int tpm_check_resource(struct acpi_resource *ares, void *data) static int tpm_tis_acpi_init(struct acpi_device *acpi_dev) { + struct acpi_table_tpm2 *tbl; + acpi_status st; struct list_head resources; - struct tpm_info tpm_info = tis_default_info; + struct tpm_info tpm_info = {}; int ret; - if (!is_fifo(acpi_dev)) + st = acpi_get_table(ACPI_SIG_TPM2, 1, + (struct acpi_table_header **) &tbl); + if (ACPI_FAILURE(st)) { + dev_err(&acpi_dev->dev, + FW_BUG "failed to get TPM2 ACPI table\n"); + return -ENODEV; + } + + if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED) return -ENODEV; INIT_LIST_HEAD(&resources); @@ -996,6 +978,14 @@ static int tpm_tis_acpi_init(struct acpi_device *acpi_dev) acpi_dev_free_resource_list(&resources); + if (tpm_info.start == 0 && tpm_info.len == 0) { + tpm_info.start = tbl->control_address; + tpm_info.len = TIS_MEM_LEN; + dev_err(&acpi_dev->dev, + FW_BUG "TPM2 ACPI table does not define a memory resource, using 0x%lx instead\n", + tpm_info.start); + } + if (is_itpm(acpi_dev)) itpm = true;