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[79.182.31.92]) by smtp.gmail.com with ESMTPSA id x7sm10933520wrr.72.2020.07.02.06.12.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Jul 2020 06:12:46 -0700 (PDT) Date: Thu, 2 Jul 2020 09:12:43 -0400 From: "Michael S. Tsirkin" To: Auger Eric Subject: Re: [PATCH v7 0/5] VIRTIO-IOMMU probe request support and MSI bypass on ARM Message-ID: <20200702091222-mutt-send-email-mst@kernel.org> References: <20200629070404.10969-1-eric.auger@redhat.com> <20200702072655-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=207.211.31.120; envelope-from=mst@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/02 03:23:40 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, jean-philippe@linaro.org, armbru@redhat.com, peterx@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, pbonzini@redhat.com, bbhushan2@marvell.com, eric.auger.pro@gmail.com Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: IO22KhbPlxHA On Thu, Jul 02, 2020 at 02:01:46PM +0200, Auger Eric wrote: > Hi Michael, > > On 7/2/20 1:28 PM, Michael S. Tsirkin wrote: > > On Mon, Jun 29, 2020 at 09:03:59AM +0200, Eric Auger wrote: > >> By default the virtio-iommu translates MSI transactions. This > >> behavior is inherited from ARM SMMU. However the virt machine > >> code knows where the MSI doorbells are, so we can easily > >> declare those regions as VIRTIO_IOMMU_RESV_MEM_T_MSI. With that > >> setting the guest iommu subsystem will not need to map MSIs. > >> This setup will simplify the VFIO integration. > >> > >> In this series, the ITS or GICV2M doorbells are declared as > >> HW MSI regions to be bypassed by the VIRTIO-IOMMU. > >> > >> This also paves the way to the x86 integration where the MSI > >> region, [0xFEE00000,0xFEEFFFFF], will be exposed by the q35 > >> machine. However this will be handled in a separate series > >> when not-DT support gets resolved. > > > > > > virtio things: > > > > Reviewed-by: Michael S. Tsirkin > > > > > > ARM tree makes sense for this, right? > > Yes I think so. > > Thanks > > Eric Okay. Feel free to merge through ARM tree pls. Reviewed-by: Michael S. Tsirkin > > > > > >> Best Regards > >> > >> Eric > >> > >> This series can be found at: > >> https://github.com/eauger/qemu/tree/v5.0.0-virtio-iommu-msi-bypass-v7 > >> > >> History: > >> > >> v6 -> v7: > >> - fix the hint message > >> - put the assert again on probe request > >> > >> v5 -> v6: > >> - do not hardcode start/end addresses of doorbells > >> - check reserved region type on realize() > >> > >> v4 -> v5: > >> - Take into account some additional comments from Markus: > >> - reserved region type becomes an unsigned + some comment/desc > >> rewording > >> - assert if the type is not RESERVED or MSI > >> > >> v3 -> v4: > >> - collected Jean and markus's R-bs > >> - tool into account all Markus' comments in [1/5] (except removal of > >> goto) > >> - use ':' as delimitor instead of commas > >> - add example in 4/5 commit message as suggested by Markus > >> > >> v2 -> v3: > >> - Introduce VIRT_MSI_CTRL_NONE in VirtMSIControllerType > >> - do not fill the remainder of the probe buffer > >> > >> v1 -> v2: > >> - check which MSI controller is in use and advertise the > >> corresponding MSI doorbell > >> - managed for both ITS and GICv2M > >> - various fixes spotted by Peter and Jean-Philippe, see > >> individual logs > >> > >> v1: Most of those patches were respinned from > >> [PATCH for-5.0 v11 00/20] VIRTIO-IOMMU device > >> except the last one which is new > >> > >> > >> Eric Auger (5): > >> qdev: Introduce DEFINE_PROP_RESERVED_REGION > >> virtio-iommu: Implement RESV_MEM probe request > >> virtio-iommu: Handle reserved regions in the translation process > >> virtio-iommu-pci: Add array of Interval properties > >> hw/arm/virt: Let the virtio-iommu bypass MSIs > >> > >> include/exec/memory.h | 6 ++ > >> include/hw/arm/virt.h | 7 ++ > >> include/hw/qdev-properties.h | 3 + > >> include/hw/virtio/virtio-iommu.h | 2 + > >> include/qemu/typedefs.h | 1 + > >> hw/arm/virt.c | 30 ++++++++ > >> hw/core/qdev-properties.c | 89 ++++++++++++++++++++++++ > >> hw/virtio/virtio-iommu-pci.c | 11 +++ > >> hw/virtio/virtio-iommu.c | 114 +++++++++++++++++++++++++++++-- > >> hw/virtio/trace-events | 1 + > >> 10 files changed, 260 insertions(+), 4 deletions(-) > >> > >> -- > >> 2.20.1 > > > >