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=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 3FBF2C4338F for ; Mon, 2 Aug 2021 13:11:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CC0960F6E for ; Mon, 2 Aug 2021 13:11:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233757AbhHBNMA (ORCPT ); Mon, 2 Aug 2021 09:12:00 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:41776 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233686AbhHBNLx (ORCPT ); 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Mon, 2 Aug 2021 13:11:41 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id lsiEKA3vB2EKYQAAGKfGzw (envelope-from ); Mon, 02 Aug 2021 13:11:41 +0000 Subject: Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support To: Joerg Roedel , Dave Hansen Cc: 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, sstabellini@kernel.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, 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> From: Juergen Gross Message-ID: <5badc0cb-3038-2eff-a4bf-022ce8fc51d7@suse.com> Date: Mon, 2 Aug 2021 15:11:40 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="6QoUicHSwDgMfYyEE95G98YrCRDodiK4T" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --6QoUicHSwDgMfYyEE95G98YrCRDodiK4T Content-Type: multipart/mixed; boundary="Q8kndzyNPSJWNnMRXKERSCRNX9KvLdc3e"; protected-headers="v1" From: Juergen Gross To: Joerg Roedel , Dave Hansen Cc: 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, sstabellini@kernel.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, 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 Message-ID: <5badc0cb-3038-2eff-a4bf-022ce8fc51d7@suse.com> Subject: Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support References: <20210728145232.285861-1-ltykernel@gmail.com> <20210728145232.285861-4-ltykernel@gmail.com> In-Reply-To: --Q8kndzyNPSJWNnMRXKERSCRNX9KvLdc3e Content-Type: multipart/mixed; boundary="------------39BD9DF23E5C4BB3D3E4101D" Content-Language: en-US This is a multi-part message in MIME format. --------------39BD9DF23E5C4BB3D3E4101D Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 02.08.21 14:01, Joerg Roedel wrote: > On Wed, Jul 28, 2021 at 08:29:41AM -0700, Dave Hansen wrote: >> __set_memory_enc_dec() is turning into a real mess. SEV, TDX and now >> Hyper-V are messing around in here. >=20 > I was going to suggest a PV_OPS call where the fitting implementation > for the guest environment can be plugged in at boot. There is TDX and a= n > SEV(-SNP) case, a Hyper-V case, and likely more coming up from other > cloud/hypervisor vendors. Hiding all these behind feature checks is not= > going to make things cleaner. As those cases are all mutually exclusive, wouldn't a static_call() be the appropriate solution? 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Mon, 2 Aug 2021 13:11:41 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id lsiEKA3vB2EKYQAAGKfGzw (envelope-from ); Mon, 02 Aug 2021 13:11:41 +0000 Subject: Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support To: Joerg Roedel , Dave Hansen References: <20210728145232.285861-1-ltykernel@gmail.com> <20210728145232.285861-4-ltykernel@gmail.com> Message-ID: <5badc0cb-3038-2eff-a4bf-022ce8fc51d7@suse.com> Date: Mon, 2 Aug 2021 15:11:40 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Cc: linux-hyperv@vger.kernel.org, brijesh.singh@amd.com, david@redhat.com, peterz@infradead.org, dave.hansen@linux.intel.com, vkuznets@redhat.com, hpa@zytor.com, anparri@microsoft.com, kys@microsoft.com, will@kernel.org, boris.ostrovsky@oracle.com, linux-arch@vger.kernel.org, sfr@canb.auug.org.au, wei.liu@kernel.org, sstabellini@kernel.org, sthemmin@microsoft.com, xen-devel@lists.xenproject.org, linux-scsi@vger.kernel.org, aneesh.kumar@linux.ibm.com, x86@kernel.org, decui@microsoft.com, Tianyu Lan , hch@lst.de, michael.h.kelley@microsoft.com, mingo@redhat.com, pgonda@google.com, rientjes@google.com, kuba@kernel.org, jejb@linux.ibm.com, martin.b.radev@gmail.com, thomas.lendacky@amd.com, Tianyu.Lan@microsoft.com, keescook@chromium.org, arnd@arndb.de, konrad.wilk@oracle.com, haiyangz@microsoft.com, bp@alien8.de, luto@kernel.org, krish.sadhukhan@oracle.com, tglx@linutronix.de, akpm@linux-foundation.org, martin.petersen@oracle.com, saravanand@fb.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, kirill.shutemov@linux.intel.com, hannes@cmpxchg.org, ardb@kernel.org, robin.murphy@arm.com, davem@davemloft.net, rppt@kernel.org 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: , From: Juergen Gross via iommu Reply-To: Juergen Gross Content-Type: multipart/mixed; boundary="===============4445147818170214553==" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============4445147818170214553== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="6QoUicHSwDgMfYyEE95G98YrCRDodiK4T" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --6QoUicHSwDgMfYyEE95G98YrCRDodiK4T Content-Type: multipart/mixed; boundary="Q8kndzyNPSJWNnMRXKERSCRNX9KvLdc3e"; protected-headers="v1" From: Juergen Gross To: Joerg Roedel , Dave Hansen Cc: 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, sstabellini@kernel.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, 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 Message-ID: <5badc0cb-3038-2eff-a4bf-022ce8fc51d7@suse.com> Subject: Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support References: <20210728145232.285861-1-ltykernel@gmail.com> <20210728145232.285861-4-ltykernel@gmail.com> In-Reply-To: --Q8kndzyNPSJWNnMRXKERSCRNX9KvLdc3e Content-Type: multipart/mixed; boundary="------------39BD9DF23E5C4BB3D3E4101D" Content-Language: en-US This is a multi-part message in MIME format. --------------39BD9DF23E5C4BB3D3E4101D Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 02.08.21 14:01, Joerg Roedel wrote: > On Wed, Jul 28, 2021 at 08:29:41AM -0700, Dave Hansen wrote: >> __set_memory_enc_dec() is turning into a real mess. SEV, TDX and now >> Hyper-V are messing around in here. >=20 > I was going to suggest a PV_OPS call where the fitting implementation > for the guest environment can be plugged in at boot. There is TDX and a= n > SEV(-SNP) case, a Hyper-V case, and likely more coming up from other > cloud/hypervisor vendors. Hiding all these behind feature checks is not= > going to make things cleaner. As those cases are all mutually exclusive, wouldn't a static_call() be the appropriate solution? 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