From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B264CC432BE for ; Thu, 29 Jul 2021 16:07:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9528660F46 for ; Thu, 29 Jul 2021 16:07:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231222AbhG2QIA (ORCPT ); Thu, 29 Jul 2021 12:08:00 -0400 Received: from mga02.intel.com ([134.134.136.20]:36019 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234601AbhG2QHI (ORCPT ); Thu, 29 Jul 2021 12:07:08 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10060"; a="200094052" X-IronPort-AV: E=Sophos;i="5.84,278,1620716400"; d="scan'208";a="200094052" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jul 2021 09:05:41 -0700 X-IronPort-AV: E=Sophos;i="5.84,278,1620716400"; d="scan'208";a="476455054" Received: from lixi1-mobl.amr.corp.intel.com (HELO [10.212.184.150]) ([10.212.184.150]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jul 2021 09:05:36 -0700 Subject: Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support To: Tianyu Lan , kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org, Tianyu.Lan@microsoft.com, rientjes@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, rppt@kernel.org, kirill.shutemov@linux.intel.com, aneesh.kumar@linux.ibm.com, krish.sadhukhan@oracle.com, saravanand@fb.com, xen-devel@lists.xenproject.org, pgonda@google.com, david@redhat.com, keescook@chromium.org, hannes@cmpxchg.org, sfr@canb.auug.org.au, michael.h.kelley@microsoft.com Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, anparri@microsoft.com References: <20210728145232.285861-1-ltykernel@gmail.com> <20210728145232.285861-4-ltykernel@gmail.com> <0d956a05-7d24-57a0-f4a9-dccc849b52fc@gmail.com> <8df2845d-ee90-56d0-1228-adebb103ec37@gmail.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <8df2845d-ee90-56d0-1228-adebb103ec37@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/29/21 8:02 AM, Tianyu Lan wrote: >> > > There is x86_hyper_type to identify hypervisor type and we may check > this variable after checking X86_FEATURE_HYPERVISOR. > > static inline bool hv_is_isolation_supported(void) > { >     if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) >         return 0; > >         if (x86_hyper_type != X86_HYPER_MS_HYPERV) >                 return 0; > >     // out of line function call: >     return __hv_is_isolation_supported(); > }    Looks fine. You just might want to use this existing helper: static inline bool hypervisor_is_type(enum x86_hypervisor_type type) { return x86_hyper_type == type; } From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB1F3C4338F for ; Thu, 29 Jul 2021 16:05:46 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6A32760F4A for ; Thu, 29 Jul 2021 16:05:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 6A32760F4A Authentication-Results: mail.kernel.org; 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29 Jul 2021 09:05:36 -0700 Subject: Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support To: Tianyu Lan , kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org, Tianyu.Lan@microsoft.com, rientjes@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, rppt@kernel.org, kirill.shutemov@linux.intel.com, aneesh.kumar@linux.ibm.com, krish.sadhukhan@oracle.com, saravanand@fb.com, xen-devel@lists.xenproject.org, pgonda@google.com, david@redhat.com, keescook@chromium.org, hannes@cmpxchg.org, sfr@canb.auug.org.au, michael.h.kelley@microsoft.com References: <20210728145232.285861-1-ltykernel@gmail.com> <20210728145232.285861-4-ltykernel@gmail.com> <0d956a05-7d24-57a0-f4a9-dccc849b52fc@gmail.com> <8df2845d-ee90-56d0-1228-adebb103ec37@gmail.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <8df2845d-ee90-56d0-1228-adebb103ec37@gmail.com> Content-Language: en-US Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, anparri@microsoft.com, vkuznets@redhat.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gNy8yOS8yMSA4OjAyIEFNLCBUaWFueXUgTGFuIHdyb3RlOgo+Pgo+IAo+IFRoZXJlIGlzIHg4 Nl9oeXBlcl90eXBlIHRvIGlkZW50aWZ5IGh5cGVydmlzb3IgdHlwZSBhbmQgd2UgbWF5IGNoZWNr Cj4gdGhpcyB2YXJpYWJsZSBhZnRlciBjaGVja2luZyBYODZfRkVBVFVSRV9IWVBFUlZJU09SLgo+ IAo+IHN0YXRpYyBpbmxpbmUgYm9vbCBodl9pc19pc29sYXRpb25fc3VwcG9ydGVkKHZvaWQpCj4g ewo+IMKgwqDCoMKgaWYgKCFjcHVfZmVhdHVyZV9lbmFibGVkKFg4Nl9GRUFUVVJFX0hZUEVSVklT T1IpKQo+IMKgwqDCoMKgwqDCoMKgIHJldHVybiAwOwo+IAo+IMKgwqDCoMKgwqDCoMKgIGlmICh4 ODZfaHlwZXJfdHlwZSAhPSBYODZfSFlQRVJfTVNfSFlQRVJWKQo+IMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoCByZXR1cm4gMDsKPiAKPiDCoMKgwqDCoC8vIG91dCBvZiBsaW5lIGZ1bmN0 aW9uIGNhbGw6Cj4gwqDCoMKgwqByZXR1cm4gX19odl9pc19pc29sYXRpb25fc3VwcG9ydGVkKCk7 Cj4gfcKgwqDCoAoKTG9va3MgZmluZS4gIFlvdSBqdXN0IG1pZ2h0IHdhbnQgdG8gdXNlIHRoaXMg ZXhpc3RpbmcgaGVscGVyOgoKc3RhdGljIGlubGluZSBib29sIGh5cGVydmlzb3JfaXNfdHlwZShl bnVtIHg4Nl9oeXBlcnZpc29yX3R5cGUgdHlwZSkKewogICAgICAgIHJldHVybiB4ODZfaHlwZXJf dHlwZSA9PSB0eXBlOwp9CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5v cmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9t bXU=