From patchwork Mon Aug 22 23:26:40 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brijesh Singh X-Patchwork-Id: 9294809 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 2D55A607FF for ; Tue, 23 Aug 2016 00:01:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D32B28A9B for ; Tue, 23 Aug 2016 00:01:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 10E1B28AE3; Tue, 23 Aug 2016 00:01:29 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 684EE28A9B for ; Tue, 23 Aug 2016 00:01:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756723AbcHWABK (ORCPT ); Mon, 22 Aug 2016 20:01:10 -0400 Received: from mail-co1nam03on0044.outbound.protection.outlook.com ([104.47.40.44]:51573 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756683AbcHWABI (ORCPT ); Mon, 22 Aug 2016 20:01:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amdcloud.onmicrosoft.com; s=selector1-amd-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=j58Cv93A4svmHoZAEymVvWlobzS8Zia0eoMaInPOtm4=; b=SS1ZQ0fl8uwV35pVfhXLwMbrz85UJ2+hjdtLn7fPXDkjIe0Jj+GNRcbbULIPBj0MEYw36vL9IHupWUtHlVMdcHdJr4B7l+DGpySWTwTMEbiociBvEvcO9runxpycWZPGdAncH/+h1Hdy0gr2J3C/8u5Cw9yLf0oxwOaNpkwNWVE= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=brijesh.singh@amd.com; Received: from [127.0.1.1] (165.204.77.1) by SN1PR12MB0670.namprd12.prod.outlook.com (10.163.208.28) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P384) id 15.1.549.15; Mon, 22 Aug 2016 23:26:43 +0000 Subject: [RFC PATCH v1 15/28] x86: Unroll string I/O when SEV is active From: Brijesh Singh To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Date: Mon, 22 Aug 2016 19:26:40 -0400 Message-ID: <147190840032.9523.7491479364800390492.stgit@brijesh-build-machine> In-Reply-To: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> References: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: BY2PR21CA0005.namprd21.prod.outlook.com (10.162.74.143) To SN1PR12MB0670.namprd12.prod.outlook.com (10.163.208.28) X-MS-Office365-Filtering-Correlation-Id: e3648293-56dd-4c6a-2e36-08d3cae3c92c X-Microsoft-Exchange-Diagnostics: 1; SN1PR12MB0670; 2:tnDggbBdAyUpqoFA+vZFoXUUuN2B+GBJsFVzgo6dgojJgCNyyQXp85tpqzCMndYY1i9acrodDeVNXmV/XiLgN80QaQejLKLbroGWdyBJ1BSxl1Ww1MDOQEezYfak9hMjks17Nh3YSCapxAmJnUL5aTo+E7/iwE+MTSmnZRTr1GoF6Gn7u9q4Ap1qoBeH73Pe; 3:8ITG4h2pj0BqNpbm0S1tJe/xCvua1MQrmmH1nL00150p1Bk3k5GuJWt0ROFEdPspEXCctF5uQ/8ZyEtnUenkRDwohRVX+MQc8+LfJ1nhcorPoUBlD3TLI3wkdX8ykEfH; 25:zX7wdd3N3IohOwmhyFtcaedDMvnWYTENJepdxCRB8k8gSjgaqWknuML46Kd/RGvXXStv99EHct2n4Yo7PMxJa9xvytyZXDqkj41k2V1P/5NJH8hQoYJ9A3+NQF/ICJBfx1I788ZxlXvCslxl5TrKSZ+W9LgG8Im8W/+gsqKc9cajfRyZaOhzmQcjnl1RnyNutyALDCRlfr2I4C7aEmJku77wIpdVYoJSo3dPu8R5p7Un+nI7onJa879dE2OZUOd/KJe5OYGMuz9kkn+kRXu6fMZ6NSslxor1dR6aBZmLPtVNVXAG75BkKT0Qfra+kJ1LuCBDkbpFfaLuX9XsBgB5nVkzH5TfKKUY2ZE0BUcJmUns6axxHBNnuamc2rT/kIlqaAjKwCbaHUnPD+enHbn+aDZPhTNg3j7yLOFcI0s7Wso= X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:SN1PR12MB0670; X-Microsoft-Exchange-Diagnostics: 1; SN1PR12MB0670; 31:g4ZYIPOw0RRvG2/8SCWgkqKT82hWvGm97UwkcuHwvbNi/46RT5LsrEQ+6MH7ErxN/5YWBGDoWbi0xAYYl5arxRGydOA4eaF57adwMaZGYdZzKpJc/VyNW86gUslTopRplH5q0hyRGXkK3SotO5fUtQfuJTa2sDltkhTFxnb51CdM+vETxlJnuez2h7ht0GRZXdxuBT3MFuXygmDlwwWri/jWUbXJhFc7cNHDrfb7Kro=; 20:CxkbsqF5CQQFgxz6qxFrzhpypVyzqPGm2uyomPxiSg0QMUOR9qt1Y7hKaFQgggy4jRZYTXorHMdXjieLkwdc1UpzLFaWh/zj/iVQrCJfrbGF4+5faGyklPR0B9edJy0lxninyP/5g3kqq5qBeUyolAMoYACcwT2K/rTe5c7bpQdXruqM1VNb5cnjegiB0C+vFE/mk8Gq5Dz4w1uH3i/ShtIixuGChPKrW6jLTW7K2ViVjyfTkk/NSCGCswz8//gS/nYIzVeHbds+eU2A6Bf8R079C9Mnb+r+7QyKa2pwKXpPhSpUbdgoZRPe8efiFhSuLSo0qi5DEIs1UAXjGZLZsyr9Y1/1DoWrkX1utb9D754ghk91wIhKwtIF0u3SY+eCdxXaJrdvbNCoFGf/eeyJzSVQdv8RuC9MAXwc2XoP/1+N/s9Mw3xi7y5N1DU8G9IZ/RSxSa1xHH6eFflTRxpe24kDTixnWJacOEz4K7HvWHoxuZ3O3LeLtKuGvxLlvWsO X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:(767451399110); X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(6040176)(601004)(2401047)(5005006)(8121501046)(3002001)(10201501046)(6055026); SRVR:SN1PR12MB0670; BCL:0; PCL:0; RULEID:; SRVR:SN1PR12MB0670; X-Microsoft-Exchange-Diagnostics: 1; SN1PR12MB0670; 4:Vtn1AYf5CStAKF+r6nlsUefSERP2eiDSTVx95J4/0lvS59XTRzKsZP86kqkcEu+BnN50fqZxVKutgK0Zi5Da3pnyJiQ0aJjXkjmFiNCNPK+EWL7tocqU/NSHWHSgte/uf6kwgydclj2kG4SGvreM0vSneOd/20NCmEZCE378OXMVlfSN9mEF+dUIbkHg1cY+5ShdbZ6cqvQQQ5+JqPrZuEsvfbpee0AwHafHJiNhvm0gjVzdub9068FBRpRw3LqZNBT8EwijvXcmKb9v+L74zvgNqyd2PyP5A9E+EyrVYa7O2uBua7H9DzjNlXnzTgQlhjLrlkT3faeUWnpgWgZznOhBSMrUZRnNSN6cQacMjDfjJGMUDsZe1j5moV75NBA6vZZnc6XM9JZVw2+7Oc8eOSRufoOrAnW3YgNlahydLXpiqaTEEg1yySddFSPJZill X-Forefront-PRVS: 00429279BA X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10009020)(4630300001)(6009001)(6049001)(7916002)(189002)(199003)(92566002)(83506001)(50466002)(4001350100001)(19580405001)(97736004)(19580395003)(107886002)(189998001)(5001770100001)(305945005)(7846002)(7736002)(101416001)(66066001)(33646002)(2201001)(50986999)(23676002)(86362001)(229853001)(47776003)(106356001)(7416002)(54356999)(7406005)(76176999)(5660300001)(9686002)(81156014)(586003)(81166006)(8676002)(230700001)(2906002)(3846002)(42186005)(2950100001)(68736007)(6116002)(77096005)(33716001)(105586002)(103116003)(921003)(217873001)(1121003)(83996005)(2101003); DIR:OUT; SFP:1101; SCL:1; SRVR:SN1PR12MB0670; H:[127.0.1.1]; FPR:; SPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) X-Microsoft-Exchange-Diagnostics: =?utf-8?B?MTtTTjFQUjEyTUIwNjcwOzIzOkhOcURZU08wSlRLb0VCeGJzSG1yb0pmVFhK?= =?utf-8?B?MHZTM3c0SzFNZHZjcWREREgxWGR3R3hQb0xNeFBRQ0RHKzI0bTRFZk1OQnVl?= =?utf-8?B?ZHpFNXFMSzh2eVJSaHkwKy9qOE1UL1EzN3ZuR1JYUDJFZkxzWDdtZzlka2tl?= =?utf-8?B?Q0dHNmV5ZG1tMEw5dXZIWjFIa0dGSGZtSk00TnVweG5kR0RrR3hpQmF5bFVn?= =?utf-8?B?YmNkejNxSklMbkZtLytTVWZZYjVHWnZnOFEvUlFYci9MRXZmYjh4b3BCbDlR?= =?utf-8?B?RWNoMXEwWFZFYTZWdzdsVDdJZUt0dlhIVXprUFZkeC92TllTR2owalEwemw2?= =?utf-8?B?NDgxL2JhRWRCakdIN3JIQ3FaN0l5MUlldlQ3R21vRVo0QUxyTVY1UVRnZU5j?= =?utf-8?B?RzBGNzVUNGtLNm5Dc0s4SW53a1VDd1BkZ2hLNDNwS1VXaTZWWEh2ZEVZNDV0?= =?utf-8?B?TXNkRytiVWNCNGVPQmdSWUZOVGxvZW5vLzNhODVsVzNybVNhL09QaWtMWVRP?= =?utf-8?B?MU5lUVBMc0VFY3ZYT0M3MTkwQWRkVU9QM3lzdUZKdVkxSnM1WVZMOGM4QnlJ?= =?utf-8?B?VVo5VDNnY1BlVXlVcFRmZnVwc1VUdFIweUdkTER5RUtYTityc1A4Z3E5cThB?= =?utf-8?B?VTNPTnByZHVpZ3Q5OWRSQVYrYU5xTGZOeVBUR0hIYkpRNWo2bnZ3MzN3aXVV?= =?utf-8?B?MUk0YlFzOWxmdWpFY29xR25Ub2gyeHh5M25pN0NkN2Q1M3h4aDhxcmM5Q2ZX?= =?utf-8?B?M3UxODVsVWlaYnV3eERNOG9Gd29pOUE1MzFoYlNYaS9BVzZSZnRPN1o4a0xj?= =?utf-8?B?bytVNXhIUWlTSmMvOXhTN01RQVNIalg4R0pKbHoxT3JDTWRNRlRuQitGSE02?= =?utf-8?B?QlJ0OXJuaDZxem9sTkpPUjFzMzNYdGd4ZXFTQ1o0WTJyNkt4RStYTVBXb1JB?= =?utf-8?B?RTdqcE1rd0VodU80b1Bud2RLSW9Ba1h0WDdOUzJrdFFpY0RhRXJEZVkzVjgy?= =?utf-8?B?Vm0wR0VxK3pxeXFwUUl6b3VkRFExaW5yL2xhc0VKSTloekFxbHVDQ3N4bWdw?= =?utf-8?B?RHNLajhSeU1lYkJtZVhjRmU5ejVuOTBpTzArNVVQbnFPWU0yaHp3N2VLaXF5?= =?utf-8?B?NVBUOEs5V0p4SkdLSUp4ZXozK1VwZU9zNXVQUlpSUHIweWIzaitjUURCUUVK?= =?utf-8?B?Z3JIZjBuOHdyOFBBWWFhUmZIcmh0UFUzMzNELzB1bGxKUE1tdlVCTTYzT3Vq?= =?utf-8?B?U2tRaEhXZTRFZG9seTRhemhmbE9yR1Z1U0FnUFEvUDk4M2JBSDROY3duVVRD?= =?utf-8?B?VG9KcTgxZzRTR0w0YXR4b3FJYk1xcCtJMU5qNm5FUUhPa1VEbmIvRUxweVlR?= =?utf-8?B?UUs1dlBkYkdWMkpiUVY4QjFIWGdwbllGM3JjR3BoOWp3UlVtSjF0Ulp0REQx?= =?utf-8?B?SU9ER1hjdHRxNEdoQTVhMXdYUW9BVk8wdFA2VlBSemFHWjJteS9US2I4b053?= =?utf-8?B?OVMzZVYyNFU0QVpFU1pkK2ZVT045bXlpY0RHSTAwT1J0UE5NREN6cGQvbXB1?= =?utf-8?B?K21yaTVHUFdiSE9Jb2NWUEhxNzhwa1loRlVlM3Nmd0JpMEhEb2xiZFJoOGRt?= =?utf-8?B?U0t4YnBmTTJ5cEwzVVNZcXh3b2VGaUtZNkJudVcwaFEyM1VaWW1KUUo0b3ZV?= =?utf-8?B?TVhtMDB0d1FYenE2SkYrVkZhek03Y1doQ1FFcEpVWWs3cTY1aytzOUlDdmNM?= =?utf-8?B?MXAxcGdiUnQrc1J4aWFjUEJsYm9Pc1ErZ2EyVENtaysrdks5clN6cFlIQk9j?= =?utf-8?Q?DWp+sohh7ZQZ2?= X-Microsoft-Exchange-Diagnostics: 1; SN1PR12MB0670; 6:iguhbZbGGwdLC/+4xzpvjMQRGTVL1OaEqtk+NJ/5Vs8cbzbnB2nBBz8KznTGX5X25tGRdi6eADrvvavteg3xmQTrpbv9WCr02/fvh7+XIe3XFyIK/ADig8oFjBS12YMGAEf8VQ9aCMXZsUtcXRwRmNNqxvGLZEwupBzKtUmKl235cUGweLqcfJAmYWtNbBxninKU2l/BxF001bO8FmVsSMavi+bSjvBL6WJSXdhkVLMQpbpSlTcfTmvUxgXbgftjv3M5fFj5wLswwuetYh0iz6A4/1Tzm7elzDTSV8QImZ7/dioKPZQJo1UJCayZ00+65lZdNSbxwu4mZKzr29VgCg==; 5:eZRX1oJMuD/+Yw6pBGjSfSq4gdfVjEBXDPCFFaDTuiunOXyRrdT93gpmFZ5vGc0WjjdIFVZKJyTgqEI+oGEK5UmgzplniudjXLJBKXQDXn5DhdTUagzB6zP0CqSuEHvoxPu8S8jfGImSi75m4nzOxw==; 24:eljOwRVRU/FCHE7UYiR7Zu+Jz5SRh0ywB9foz0v4mMQH8HL3qOVqhmSWq6YAE9qzsrrtPJrNvkBM3cZXKXWBzaemNfom3MyGEuDh3PHqd4Y=; 7:zyJZf2QR0Ql5kMt381/Z9xFd37nSQHGSb8dujuBBDB4P3WMhP4icg9w4neRosVynIe//upi9v0DRHuZH6bny8joLPCc+7Jaa9x2253joLF1QYAQnxgT/3WOPTWNdN6zdsFebfmx/uzaltH4D+n9w7f6GQCJdr4GyYE3A0NFLp3JE1u601SGQl4BodTi9d2RuAXQGQ7hQdG33K2Wd3ArtWeudYBLF9o/jYUdPn885boRiD4a+8ca3hEoU0W58ODpZ SpamDiagnosticOutput: 1:99 SpamDiagnosticMetadata: NSPM X-Microsoft-Exchange-Diagnostics: 1; SN1PR12MB0670; 20:xXajXRgVL8w+IRgkJqSeNlUBSMS+7Q06N9zwAQSlrz7HCsMsCfQEfegjnntr62QVh5EXSwhSMdqAauRnqJTsBANvQfNEH/2K0ilZxfTEP+psTyFtAqvSqOScAzGiNy6fGGyLtWDwT4mq8VDRbEG3E2FkAajmXahRZtQuC6CIiKcjHwXdUmXsbRqO70zJjSoe+QMSmnOhERHFrTm21kFmYmXxvHazZY/vjKAS1u7+pi2O1UrBxBinHPm8ftumcuZ/ X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Aug 2016 23:26:43.2874 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR12MB0670 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tom Lendacky Secure Encrypted Virtualization (SEV) does not support string I/O, so unroll the string I/O operation into a loop operating on one element at a time. Signed-off-by: Tom Lendacky --- arch/x86/include/asm/io.h | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index de25aad..130b3e2 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -303,14 +303,32 @@ static inline unsigned type in##bwl##_p(int port) \ \ static inline void outs##bwl(int port, const void *addr, unsigned long count) \ { \ - asm volatile("rep; outs" #bwl \ - : "+S"(addr), "+c"(count) : "d"(port)); \ + if (sev_active) { \ + unsigned type *value = (unsigned type *)addr; \ + while (count) { \ + out##bwl(*value, port); \ + value++; \ + count--; \ + } \ + } else { \ + asm volatile("rep; outs" #bwl \ + : "+S"(addr), "+c"(count) : "d"(port)); \ + } \ } \ \ static inline void ins##bwl(int port, void *addr, unsigned long count) \ { \ - asm volatile("rep; ins" #bwl \ - : "+D"(addr), "+c"(count) : "d"(port)); \ + if (sev_active) { \ + unsigned type *value = (unsigned type *)addr; \ + while (count) { \ + *value = in##bwl(port); \ + value++; \ + count--; \ + } \ + } else { \ + asm volatile("rep; ins" #bwl \ + : "+D"(addr), "+c"(count) : "d"(port)); \ + } \ } BUILDIO(b, b, char)