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Shutemov" X-Patchwork-Id: 11068165 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EBF96746 for ; Wed, 31 Jul 2019 15:13:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D6D55201BD for ; Wed, 31 Jul 2019 15:13:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CA82A205F8; Wed, 31 Jul 2019 15:13:52 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2B7132022C for ; Wed, 31 Jul 2019 15:13:52 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 31F3A8E0020; Wed, 31 Jul 2019 11:13:51 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 2CFB88E0005; Wed, 31 Jul 2019 11:13:51 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1BED48E0020; Wed, 31 Jul 2019 11:13:51 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) by kanga.kvack.org (Postfix) with ESMTP id C3E638E0005 for ; Wed, 31 Jul 2019 11:13:50 -0400 (EDT) Received: by mail-ed1-f69.google.com with SMTP id f19so42620124edv.16 for ; Wed, 31 Jul 2019 08:13:50 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:from:to:cc:subject:date :message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=PzedmcWsRc3DhudY/wiWcVyq0AAagaASN0DGAs1EUfk=; b=R8RzN1CKnHaZIhUVqSMMCHTUEMYgB12cMCMfyZr7kFIsClKmm14vKFFQZ8yfOMrzh3 jLXMICM39wOwKmTwf9VG11btw2v2L5vckqUk00oIKkFMggDAPhalYDkaLlcFCwfM26ka npnIfaDo8Npm4FwCyjRL/82obmOI2PctCOyPTnDIxkVBxjQoH8uXNbuWPq7K2WuI7nVH Zl61y1M2ZFDSta1XclRqhoXmYAaBfTkBNxrYh1CwPXxDQfqqeqZX0sVCd2GFpku8lQZM 5isDJSMnbme9/TYCpvEhOSIUc1i8ngDbF3rrX5IUmfqMCdumCQfu9ojAum+OAGLreSG5 g3Nw== X-Gm-Message-State: APjAAAWL7/60RhknERL/4Y3V2CBoaHno4bA1FJ+n9Mzfb3sDsTNxoHXq NFXztp7mc21uC3gpdoKWQ4Q470kqF/Ic8RYAibKO8ZGagA6UZhv9iZmTsQ+DykJPdqV4Aanity6 dVZnIQHynG8av5awiir9O7cpIhwSU43FnEmyqlQ32VriYb61quZwnFd/Oa3IXack= X-Received: by 2002:aa7:dd09:: with SMTP id i9mr109849273edv.193.1564586030332; Wed, 31 Jul 2019 08:13:50 -0700 (PDT) X-Received: by 2002:aa7:dd09:: with SMTP id i9mr109849142edv.193.1564586029040; Wed, 31 Jul 2019 08:13:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1564586029; cv=none; d=google.com; s=arc-20160816; b=tlhCHIilpx/OPSkykDMYCDKW9aLUNlglZTZOfUo7wXdZ+F2YxIhlsmaxgMkc+SF+cm I1PPkbMldDM91hMd1nd5bJPiXHHDHRtPk4shyMCiBXe5rdHVWpvZR2Y2L998fu/oFDTz PZnweN9EQ+LWf22t+M48Xu1aEJfMX51N5XV6GQMjXopVhvHr0QW4MZZ2fTgkIkMg7Mom psYCBeYNQfabKYaE2xf/qZF65WfHVppBBxTjGOlsv3LyD0FhJWlY7Nq4P74k+ehdsPLw xPSIdVzcsjm5Mzlf+UUB91yOHqEZ67CEH+Ryzn4AGGrZZGVc4MxR0EajIRSrxZRYuvoK 2U1A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=PzedmcWsRc3DhudY/wiWcVyq0AAagaASN0DGAs1EUfk=; b=s/Ewn/qepdjFUnS+RiaNb8qj4sQwilpo5C4qioS3QG/zfQaC9HRam64KHbu2Ys408z 0eIHln1moIQ732ccM7O9q5XuFFnKw5cgMmkSrJ9ACUjDHC9i493GZBA3AhaEUmqmUqIy bdOWLTdUJhppuYhgzrUZj06xQ9qDen4wAOE8+foYlIcKHUrD7QB4JB2U2r/+DDXX/YgB 1YG7X+Mei4mxttvaMBlKSa65yknjVJzySJCXDlIdzUCIG1c8e921zqsUyP72L7dxfLDP BjN6/3bYUMRIIQ+KQedzTCGSJYQ2MiJL89KbtRc9lFMikbAXWwuCDkwOlxWNSsHiCC1l f5Pg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@shutemov-name.20150623.gappssmtp.com header.s=20150623 header.b=oLYDLyPe; spf=neutral (google.com: 209.85.220.65 is neither permitted nor denied by best guess record for domain of kirill@shutemov.name) smtp.mailfrom=kirill@shutemov.name Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. 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Shutemov" X-Google-Original-From: "Kirill A. Shutemov" Received: by box.localdomain (Postfix, from userid 1000) id BF3F9103FDC; Wed, 31 Jul 2019 18:08:16 +0300 (+03) To: Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , David Howells Cc: Kees Cook , Dave Hansen , Kai Huang , Jacob Pan , Alison Schofield , linux-mm@kvack.org, kvm@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A . Shutemov" Subject: [PATCHv2 30/59] keys/mktme: Program MKTME keys into the platform hardware Date: Wed, 31 Jul 2019 18:07:44 +0300 Message-Id: <20190731150813.26289-31-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190731150813.26289-1-kirill.shutemov@linux.intel.com> References: <20190731150813.26289-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: X-Virus-Scanned: ClamAV using ClamSMTP From: Alison Schofield Finally, the keys are programmed into the hardware via each lead CPU. Every package has to be programmed successfully. There is no partial success allowed here. Here a retry scheme is included for two errors that may succeed on retry: MKTME_DEVICE_BUSY and MKTME_ENTROPY_ERROR. However, it's not clear if even those errors should be retried at this level. Perhaps they too, should be returned to user space for handling. Signed-off-by: Alison Schofield Signed-off-by: Kirill A. Shutemov --- security/keys/mktme_keys.c | 92 +++++++++++++++++++++++++++++++++++++- 1 file changed, 91 insertions(+), 1 deletion(-) diff --git a/security/keys/mktme_keys.c b/security/keys/mktme_keys.c index 272bff8591b7..3c641f3ee794 100644 --- a/security/keys/mktme_keys.c +++ b/security/keys/mktme_keys.c @@ -83,6 +83,96 @@ static const match_table_t mktme_token = { {OPT_ERROR, NULL} }; +struct mktme_hw_program_info { + struct mktme_key_program *key_program; + int *status; +}; + +struct mktme_err_table { + const char *msg; + bool retry; +}; + +static const struct mktme_err_table mktme_error[] = { +/* MKTME_PROG_SUCCESS */ {"KeyID was successfully programmed", false}, +/* MKTME_INVALID_PROG_CMD */ {"Invalid KeyID programming command", false}, +/* MKTME_ENTROPY_ERROR */ {"Insufficient entropy", true}, +/* MKTME_INVALID_KEYID */ {"KeyID not valid", false}, +/* MKTME_INVALID_ENC_ALG */ {"Invalid encryption algorithm chosen", false}, +/* MKTME_DEVICE_BUSY */ {"Failure to access key table", true}, +}; + +static int mktme_parse_program_status(int status[]) +{ + int cpu, sum = 0; + + /* Success: all CPU(s) programmed all key table(s) */ + for_each_cpu(cpu, mktme_leadcpus) + sum += status[cpu]; + if (!sum) + return MKTME_PROG_SUCCESS; + + /* Invalid Parameters: log the error and return the error. */ + for_each_cpu(cpu, mktme_leadcpus) { + switch (status[cpu]) { + case MKTME_INVALID_KEYID: + case MKTME_INVALID_PROG_CMD: + case MKTME_INVALID_ENC_ALG: + pr_err("mktme: %s\n", mktme_error[status[cpu]].msg); + return status[cpu]; + + default: + break; + } + } + /* + * Device Busy or Insufficient Entropy: do not log the + * error. These will be retried and if retries (time or + * count runs out) caller will log the error. + */ + for_each_cpu(cpu, mktme_leadcpus) { + if (status[cpu] == MKTME_DEVICE_BUSY) + return status[cpu]; + } + return MKTME_ENTROPY_ERROR; +} + +/* Program a single key using one CPU. */ +static void mktme_do_program(void *hw_program_info) +{ + struct mktme_hw_program_info *info = hw_program_info; + int cpu; + + cpu = smp_processor_id(); + info->status[cpu] = mktme_key_program(info->key_program); +} + +static int mktme_program_all_keytables(struct mktme_key_program *key_program) +{ + struct mktme_hw_program_info info; + int err, retries = 10; /* Maybe users should handle retries */ + + info.key_program = key_program; + info.status = kcalloc(num_possible_cpus(), sizeof(info.status[0]), + GFP_KERNEL); + + while (retries--) { + get_online_cpus(); + on_each_cpu_mask(mktme_leadcpus, mktme_do_program, + &info, 1); + put_online_cpus(); + + err = mktme_parse_program_status(info.status); + if (!err) /* Success */ + return err; + else if (!mktme_error[err].retry) /* Error no retry */ + return -ENOKEY; + } + /* Ran out of retries */ + pr_err("mktme: %s\n", mktme_error[err].msg); + return err; +} + /* Copy the payload to the HW programming structure and program this KeyID */ static int mktme_program_keyid(int keyid, u32 payload) { @@ -97,7 +187,7 @@ static int mktme_program_keyid(int keyid, u32 payload) kprog->keyid = keyid; kprog->keyid_ctrl = payload; - ret = MKTME_PROG_SUCCESS; /* Future programming call */ + ret = mktme_program_all_keytables(kprog); kmem_cache_free(mktme_prog_cache, kprog); return ret; }