From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: Eric Auger <eric.auger@redhat.com>,
Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>,
qemu-arm@nongnu.org, qemu-devel@nongnu.org,
peter.maydell@linaro.org, ddutile@redhat.com,
berrange@redhat.com, nathanc@nvidia.com, mochs@nvidia.com,
smostafa@google.com, linuxarm@huawei.com,
wangzhou1@hisilicon.com, jiangkunkun@huawei.com,
jonathan.cameron@huawei.com, zhangfei.gao@linaro.org
Subject: Re: [RFC PATCH v2 03/20] hw/arm/smmuv3-accel: Add initial infrastructure for smmuv3-accel device
Date: Mon, 17 Mar 2025 16:24:53 -0300 [thread overview]
Message-ID: <20250317192453.GR9311@nvidia.com> (raw)
In-Reply-To: <Z9hzmzHfWw18OyGO@Asurada-Nvidia>
On Mon, Mar 17, 2025 at 12:10:19PM -0700, Nicolin Chen wrote:
> Another question: how does an emulated device work with a vSMMUv3?
> I could imagine that all the accel steps would be bypassed since
> !sdev->idev. Yet, the emulated iotlb should cache its translation
> so we will need to flush the iotlb, which will increase complexity
> as the TLBI command dispatching function will need to be aware what
> ASID is for emulated device and what is for vfio device..
I think you should block it. We already expect different vSMMU's
depending on the physical SMMU under the PCI device, it makes sense
that a SW VFIO device would have it's own, non-accelerated, vSMMU
model in the guest.
Jason
next prev parent reply other threads:[~2025-03-17 19:25 UTC|newest]
Thread overview: 172+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-11 14:10 [RFC PATCH v2 00/20] hw/arm/virt: Add support for user-creatable accelerated SMMUv3 Shameer Kolothum via
2025-03-11 14:10 ` [RFC PATCH v2 01/20] backends/iommufd: Introduce iommufd_backend_alloc_viommu Shameer Kolothum via
2025-03-12 15:20 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 02/20] backends/iommufd: Introduce iommufd_vdev_alloc Shameer Kolothum via
2025-03-12 15:25 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 03/20] hw/arm/smmuv3-accel: Add initial infrastructure for smmuv3-accel device Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-11 20:13 ` Nicolin Chen
2025-03-12 15:15 ` Eric Auger
2025-03-17 17:54 ` Nicolin Chen
2025-03-17 18:07 ` Eric Auger
2025-03-17 19:10 ` Nicolin Chen
2025-03-17 19:24 ` Jason Gunthorpe [this message]
2025-03-17 20:19 ` Nicolin Chen
2025-03-18 9:50 ` Shameerali Kolothum Thodi via
2025-03-18 9:50 ` Shameerali Kolothum Thodi via
2025-03-18 18:31 ` Eric Auger
2025-03-18 19:13 ` Nicolin Chen
2025-03-18 21:22 ` Donald Dutile
2025-03-19 0:23 ` Jason Gunthorpe
2025-03-19 2:15 ` Donald Dutile
2025-03-19 17:00 ` Eric Auger
2025-03-19 17:12 ` Shameerali Kolothum Thodi via
2025-03-19 17:12 ` Shameerali Kolothum Thodi via
2025-03-19 17:38 ` Eric Auger
2025-03-21 0:55 ` Donald Dutile
2025-03-19 17:04 ` Eric Auger
2025-03-21 0:54 ` Donald Dutile
2025-03-24 14:52 ` Eric Auger
2025-03-19 0:31 ` Jason Gunthorpe
2025-03-19 5:27 ` Nicolin Chen
2025-03-24 14:08 ` Eric Auger
2025-03-18 21:42 ` Donald Dutile
2025-03-19 16:45 ` Eric Auger
2025-03-19 16:53 ` Shameerali Kolothum Thodi via
2025-03-19 16:53 ` Shameerali Kolothum Thodi via
2025-03-19 17:26 ` Eric Auger
2025-03-19 17:34 ` Jason Gunthorpe
2025-03-19 17:41 ` Eric Auger
2025-03-19 17:14 ` Nicolin Chen
2025-03-19 18:09 ` Eric Auger
2025-03-19 18:34 ` Nicolin Chen
2025-03-24 14:46 ` Eric Auger
2025-03-21 1:26 ` Donald Dutile
2025-03-24 14:59 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 04/20] hw/arm/virt: Add support for smmuv3-accel Shameer Kolothum via
2025-03-11 20:22 ` Nicolin Chen
2025-03-12 9:44 ` Shameerali Kolothum Thodi via
2025-03-12 15:36 ` Eric Auger
2025-03-12 15:46 ` Shameerali Kolothum Thodi via
2025-03-12 15:46 ` Shameerali Kolothum Thodi via
2025-03-12 16:13 ` Eric Auger
2025-03-12 16:22 ` Shameerali Kolothum Thodi via
2025-03-12 16:27 ` Eric Auger
2025-03-12 17:34 ` Shameerali Kolothum Thodi via
2025-03-12 18:30 ` Eric Auger
2025-03-13 8:26 ` Shameerali Kolothum Thodi via
2025-03-13 15:22 ` Eric Auger
2025-03-18 22:49 ` Donald Dutile
2025-03-19 9:28 ` Shameerali Kolothum Thodi via
2025-03-19 9:28 ` Shameerali Kolothum Thodi via
2025-03-11 14:10 ` [RFC PATCH v2 05/20] hw/arm/smmuv3-accel: Associate a pxb-pcie bus Shameer Kolothum via
2025-03-12 16:07 ` Eric Auger
2025-03-12 16:34 ` Shameerali Kolothum Thodi via
2025-03-12 16:34 ` Shameerali Kolothum Thodi via
2025-03-12 16:39 ` Daniel P. Berrangé
2025-03-12 17:28 ` Shameerali Kolothum Thodi via
2025-03-12 17:28 ` Shameerali Kolothum Thodi via
2025-03-13 15:21 ` Eric Auger
2025-03-12 16:42 ` Eric Auger
2025-03-13 8:22 ` Shameerali Kolothum Thodi via
2025-03-13 8:22 ` Shameerali Kolothum Thodi via
2025-03-17 16:57 ` Eric Auger
2025-03-18 22:12 ` Donald Dutile
2025-03-19 9:26 ` Shameerali Kolothum Thodi via
2025-03-19 9:26 ` Shameerali Kolothum Thodi via
2025-03-19 16:21 ` Donald Dutile
2025-03-19 18:21 ` Eric Auger
2025-03-21 0:59 ` Donald Dutile
2025-03-24 14:56 ` Eric Auger
2025-03-24 15:02 ` Daniel P. Berrangé
2025-03-24 21:43 ` Donald Dutile
2025-03-20 17:02 ` Nicolin Chen
2025-03-24 8:19 ` Shameerali Kolothum Thodi via
2025-03-24 8:19 ` Shameerali Kolothum Thodi via
2025-03-24 13:13 ` Eric Auger
2025-03-24 13:55 ` Shameerali Kolothum Thodi via
2025-03-24 13:55 ` Shameerali Kolothum Thodi via
2025-03-24 15:34 ` Eric Auger
2025-03-24 16:01 ` Nicolin Chen
2025-03-24 16:06 ` Shameerali Kolothum Thodi via
2025-03-24 16:06 ` Shameerali Kolothum Thodi via
2025-03-24 15:50 ` Nicolin Chen
2025-03-11 14:10 ` [RFC PATCH v2 06/20] hw/arm/smmu-common: Factor out common helper functions and export Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-12 16:12 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 07/20] hw/arm/smmu-common: Introduce callbacks for PCIIOMMUOps Shameer Kolothum via
2025-03-12 16:23 ` Eric Auger
2025-03-13 8:09 ` Shameerali Kolothum Thodi via
2025-03-13 8:09 ` Shameerali Kolothum Thodi via
2025-03-17 16:52 ` Eric Auger
2025-03-18 9:47 ` Shameerali Kolothum Thodi via
2025-03-12 17:10 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 08/20] hw/arm/smmuv3-accel: Provide get_address_space callback Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-11 20:50 ` Nicolin Chen
2025-03-12 17:14 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 09/20] hw/arm/smmuv3-accel: Add set/unset_iommu_device callback Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-11 21:07 ` Nicolin Chen
2025-03-17 8:38 ` Shameerali Kolothum Thodi via
2025-03-17 8:38 ` Shameerali Kolothum Thodi via
2025-03-17 18:19 ` Nicolin Chen
2025-03-12 12:52 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 10/20] hw/arm/smmuv3-accel: Support nested STE install/uninstall support Shameer Kolothum via
2025-03-25 18:08 ` Eric Auger
2025-03-25 19:33 ` Nicolin Chen
2025-03-11 14:10 ` [RFC PATCH v2 11/20] hw/arm/smmuv3-accel: Allocate a vDEVICE object for device Shameer Kolothum via
2025-03-18 23:30 ` Donald Dutile
2025-03-25 18:13 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 12/20] hw/arm/smmuv3-accel: Return sysmem if stage-1 is bypassed Shameer Kolothum via
2025-03-25 18:47 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 13/20] hw/arm/smmuv3-accel: Introduce helpers to batch and issue cache invalidations Shameer Kolothum via
2025-03-19 1:31 ` Donald Dutile
2025-03-19 9:48 ` Shameerali Kolothum Thodi via
2025-03-19 9:48 ` Shameerali Kolothum Thodi via
2025-03-19 16:24 ` Donald Dutile
2025-03-19 16:48 ` Nicolin Chen
2025-03-26 13:38 ` Eric Auger
2025-03-26 19:16 ` Nicolin Chen
2025-03-27 7:46 ` Shameerali Kolothum Thodi via
2025-03-27 8:00 ` Eric Auger
2025-03-26 13:59 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 14/20] hw/arm/smmuv3: Install nested ste for CFGI_STE Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-26 13:39 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 15/20] hw/arm/smmuv3: Forward invalidation commands to hw Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-26 14:16 ` Eric Auger
2025-03-26 19:27 ` Nicolin Chen
2025-03-27 8:03 ` Eric Auger
2025-03-26 14:18 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 16/20] hw/arm/smmuv3-accel: Read host SMMUv3 device info Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-19 2:45 ` Donald Dutile
2025-03-26 14:57 ` Eric Auger
2025-03-11 14:10 ` [RFC PATCH v2 17/20] hw/arm/smmuv3: Check idr registers for STE_S1CDMAX and STE_S1STALLD Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-26 17:18 ` Eric Auger
2025-03-26 19:46 ` Nicolin Chen
2025-03-27 7:54 ` Shameerali Kolothum Thodi via
2025-03-27 7:54 ` Shameerali Kolothum Thodi via
2025-03-27 9:11 ` Eric Auger
2025-03-27 13:05 ` Jason Gunthorpe
2025-03-11 14:10 ` [RFC PATCH v2 18/20] hw/arm/smmu-common: Bypass emulated IOTLB for a accel SMMUv3 Shameer Kolothum via
2025-03-19 2:52 ` Donald Dutile
2025-03-26 17:40 ` Eric Auger
2025-03-26 19:57 ` Nicolin Chen
2025-03-11 14:10 ` [RFC PATCH v2 19/20] hw/arm/virt-acpi-build: Update IORT with multiple smmuv3-accel nodes Shameer Kolothum via
2025-03-26 18:14 ` Eric Auger
2025-03-26 18:50 ` Nicolin Chen
2025-03-27 9:26 ` Shameerali Kolothum Thodi via
2025-03-27 9:26 ` Shameerali Kolothum Thodi via
2025-03-11 14:10 ` [RFC PATCH v2 20/20] hw/arm/smmuv3-accel: Enable smmuv3-accel creation Shameer Kolothum via
2025-03-11 14:10 ` Shameer Kolothum via
2025-03-19 16:40 ` [RFC PATCH v2 00/20] hw/arm/virt: Add support for user-creatable accelerated SMMUv3 Philippe Mathieu-Daudé
2025-03-19 17:13 ` Eric Auger
2025-03-25 14:42 ` Eric Auger
2025-03-25 15:43 ` Shameerali Kolothum Thodi via
2025-03-25 18:26 ` Nicolin Chen via
2025-03-25 18:26 ` Nicolin Chen via
2025-03-25 18:52 ` Eric Auger
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