Message ID | 20190508144422.13171-40-kirill.shutemov@linux.intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <owner-linux-mm@kvack.org> 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 639ED924 for <patchwork-linux-mm@patchwork.kernel.org>; Wed, 8 May 2019 14:46:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 553412844B for <patchwork-linux-mm@patchwork.kernel.org>; Wed, 8 May 2019 14:46:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4930E28485; Wed, 8 May 2019 14:46:17 +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,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=unavailable 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 D849F2844B for <patchwork-linux-mm@patchwork.kernel.org>; Wed, 8 May 2019 14:46:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 17AF26B0297; Wed, 8 May 2019 10:44:52 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id CBAAE6B02A2; Wed, 8 May 2019 10:44:51 -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 AC2686B029F; Wed, 8 May 2019 10:44:51 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from mail-pl1-f199.google.com (mail-pl1-f199.google.com [209.85.214.199]) by kanga.kvack.org (Postfix) with ESMTP id 0EB796B029D for <linux-mm@kvack.org>; Wed, 8 May 2019 10:44:51 -0400 (EDT) Received: by mail-pl1-f199.google.com with SMTP id u1so7217206plk.10 for <linux-mm@kvack.org>; Wed, 08 May 2019 07:44:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:from:to:cc :subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=C0qd/ZrLjU/aqPZxyXdJXxvU47OZwk6fFZiZPrrOo54=; b=KbprH3MTbTVcuX/91/KixUnU8xCDFHpemYaUEzI7JsiWlREU0JUEf8koBwzHCcvji2 mB3pijdXH90a4DneKit4YsVDOgC1UAeHFmC0I94BFW8VCQAYaPVmTDbUnUQAqRf+aqZv StLq3NijrQH5Hs0oB6WdfA+RcMggPHvzgBQ1im6UNltKo6pSQrr4QPcjja1MjJxn7sVM TADjDjZ4IxbvJUEHei5MJF0PEjNmRKBFcifWBY+ZCaphMo42YGQlyHK/jRY4uUkqirv5 TSpkc2cDIO4Zrvi3C3MZriJajEc5rMUMi42e+931kymbgRgujVAFnepxZXuMeVwU8cvY H2xA== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of kirill.shutemov@linux.intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Gm-Message-State: APjAAAWvqZJlTgmEqyNKf2Kwv2JC2wr0ASXZ0k+ZSGE3CkcEg4Of4Zcp rKMihArZMgXcfhKNw0vJKfeE136EFBLViwBpszw8GWWBc2PVZfUdW9ZGMJRVkgwvxYyV9XDhj1W POIGVz4s8T8an9piH6PnvSv1FU1HCniObYFRZU7VUTkXhWsTjfR+6QXBnp1X78AsY8Q== X-Received: by 2002:a63:d0e:: with SMTP id c14mr7072436pgl.345.1557326690729; Wed, 08 May 2019 07:44:50 -0700 (PDT) X-Google-Smtp-Source: APXvYqzzAn7c9gJqgN7ZlcbBN4ykIcAie7uMNG2JV6/yp/QCr/YiwEP7NeH8kf1sDV6rQ9rZ3EGF X-Received: by 2002:a63:d0e:: with SMTP id c14mr7072295pgl.345.1557326689423; Wed, 08 May 2019 07:44:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1557326689; cv=none; d=google.com; s=arc-20160816; b=CsTqRI33tGNkTfVjSjkzWomn+WY8z8ZKbj2cEADSSSF1z+4hTKqILQoppTGqSTD+nf +jRZyFV8+I0TfhmOSnNZekgcg6EaiodyAiDVgrGLKmr5bRt4YHQdF4N8IDvxMaEUMSWS aV0LUC1elGq/DQl6a/n5xjOBPnlS3/lp/7B2I4wYSpmokZh2tfHfyrEfGftvY8hiDqxr 7DLM5qzPmUGiWhyAYhkTPgBCC1UEWpLLHrqMKffeZ6zdZz3IG0KIDCKtlx73UPsRI2bU a8IHisiyJHKo9577eQHggw/LzVHJI1C/nAWjTvg54zDntlC836HVNhU4bk1/AA2z8eIP zSbw== 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; bh=C0qd/ZrLjU/aqPZxyXdJXxvU47OZwk6fFZiZPrrOo54=; b=w4OefjDvK6sduhk0gpZ20NiO7cKGixX0i0DUeOMTNS7E9YFmUXYVkooaXhurQXuH81 2plUq7foWjTx0oeWhiIEuo5qPue1VCohQHeAGaykMuoUffm05yylrcsWe0ompuBfEbDK OB3PKX2JRDQ80G3G/AclzLHfLCSrRdgfwBlj5qeD6ATaBYFLHJHlP6P5N0ymGOUa7kwM 8djckYTCJ1joMbJRlYNC7tyAQbeRRdq9U6ixdWkHfxbYE3CwH1wWhzbAJA3SYrRpwuiW k5QnmBjp8qNQz1LRbM3QWjgNMnXn1KK3iRp5gpb/qd9ocHuEM0ttnm/wGs3H+Ua8fbZi vQuw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of kirill.shutemov@linux.intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from mga06.intel.com (mga06.intel.com. [134.134.136.31]) by mx.google.com with ESMTPS id e61si23294206plb.123.2019.05.08.07.44.49 for <linux-mm@kvack.org> (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 08 May 2019 07:44:49 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of kirill.shutemov@linux.intel.com designates 134.134.136.31 as permitted sender) client-ip=134.134.136.31; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of kirill.shutemov@linux.intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 May 2019 07:44:49 -0700 X-ExtLoop1: 1 Received: from black.fi.intel.com ([10.237.72.28]) by FMSMGA003.fm.intel.com with ESMTP; 08 May 2019 07:44:44 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 9F78EC1D; Wed, 8 May 2019 17:44:30 +0300 (EEST) From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> To: Andrew Morton <akpm@linux-foundation.org>, x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, Borislav Petkov <bp@alien8.de>, Peter Zijlstra <peterz@infradead.org>, Andy Lutomirski <luto@amacapital.net>, David Howells <dhowells@redhat.com> Cc: Kees Cook <keescook@chromium.org>, Dave Hansen <dave.hansen@intel.com>, Kai Huang <kai.huang@linux.intel.com>, Jacob Pan <jacob.jun.pan@linux.intel.com>, Alison Schofield <alison.schofield@intel.com>, linux-mm@kvack.org, kvm@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Subject: [PATCH, RFC 39/62] keys/mktme: Find new PCONFIG targets during memory hotplug Date: Wed, 8 May 2019 17:43:59 +0300 Message-Id: <20190508144422.13171-40-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190508144422.13171-1-kirill.shutemov@linux.intel.com> References: <20190508144422.13171-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
Intel MKTME enabling
|
expand
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diff --git a/security/keys/mktme_keys.c b/security/keys/mktme_keys.c index 3dfc0647f1e5..2c975c48fe44 100644 --- a/security/keys/mktme_keys.c +++ b/security/keys/mktme_keys.c @@ -543,6 +543,45 @@ static int mktme_cpu_teardown(unsigned int cpu) return ret; } +static int mktme_get_new_pconfig_target(void) +{ + unsigned long *prev_map, *tmp_map; + int new_target; /* New PCONFIG target to program */ + + /* Save the current mktme_target_map bitmap */ + prev_map = bitmap_alloc(topology_max_packages(), GFP_KERNEL); + bitmap_copy(prev_map, mktme_target_map, sizeof(mktme_target_map)); + + /* Update the global targets - includes mktme_target_map */ + mktme_update_pconfig_targets(); + + /* Nothing to do if the target bitmap is unchanged */ + if (bitmap_equal(prev_map, mktme_target_map, sizeof(prev_map))) { + new_target = -1; + goto free_prev; + } + + /* Find the change in the target bitmap */ + tmp_map = bitmap_alloc(topology_max_packages(), GFP_KERNEL); + bitmap_andnot(tmp_map, prev_map, mktme_target_map, + sizeof(prev_map)); + + /* There should only be one new target */ + if (bitmap_weight(tmp_map, sizeof(tmp_map)) != 1) { + pr_err("%s: expected %d new target, got %d\n", __func__, 1, + bitmap_weight(tmp_map, sizeof(tmp_map))); + new_target = -1; + goto free_tmp; + } + new_target = find_first_bit(tmp_map, sizeof(tmp_map)); + +free_tmp: + bitmap_free(tmp_map); +free_prev: + bitmap_free(prev_map); + return new_target; +} + static int __init init_mktme(void) { int ret, cpuhp;