From: Auger Eric <eric.auger@redhat.com>
To: Liu Yi L <yi.l.liu@intel.com>,
alex.williamson@redhat.com, baolu.lu@linux.intel.com,
joro@8bytes.org
Cc: kevin.tian@intel.com, jacob.jun.pan@linux.intel.com,
ashok.raj@intel.com, jun.j.tian@intel.com, yi.y.sun@intel.com,
jean-philippe@linaro.org, peterx@redhat.com, hao.wu@intel.com,
stefanha@gmail.com, iommu@lists.linux-foundation.org,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 13/15] vfio/pci: Expose PCIe PASID capability to guest
Date: Mon, 20 Jul 2020 14:35:26 +0200 [thread overview]
Message-ID: <63d4c058-246d-1a11-af66-e97fd5ec9bd3@redhat.com> (raw)
In-Reply-To: <1594552870-55687-14-git-send-email-yi.l.liu@intel.com>
Yi,
On 7/12/20 1:21 PM, Liu Yi L wrote:
> This patch exposes PCIe PASID capability to guest for assigned devices.
> Existing vfio_pci driver hides it from guest by setting the capability
> length as 0 in pci_ext_cap_length[].
>
> And this patch only exposes PASID capability for devices which has PCIe
> PASID extended struture in its configuration space. So VFs, will will
s/will//
> not see PASID capability on VFs as VF doesn't implement PASID extended
suggested rewording: VFs will not expose the PASID capability as they do
not implement the PASID extended structure in their config space?
> structure in its configuration space. For VF, it is a TODO in future.
> Related discussion can be found in below link:
>
> https://lkml.org/lkml/2020/4/7/693
>
> Cc: Kevin Tian <kevin.tian@intel.com>
> CC: Jacob Pan <jacob.jun.pan@linux.intel.com>
> Cc: Alex Williamson <alex.williamson@redhat.com>
> Cc: Eric Auger <eric.auger@redhat.com>
> Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
> Cc: Joerg Roedel <joro@8bytes.org>
> Cc: Lu Baolu <baolu.lu@linux.intel.com>
> Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
> ---
> v1 -> v2:
> *) added in v2, but it was sent in a separate patchseries before
> ---
> drivers/vfio/pci/vfio_pci_config.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
> index d98843f..07ff2e6 100644
> --- a/drivers/vfio/pci/vfio_pci_config.c
> +++ b/drivers/vfio/pci/vfio_pci_config.c
> @@ -95,7 +95,7 @@ static const u16 pci_ext_cap_length[PCI_EXT_CAP_ID_MAX + 1] = {
> [PCI_EXT_CAP_ID_LTR] = PCI_EXT_CAP_LTR_SIZEOF,
> [PCI_EXT_CAP_ID_SECPCI] = 0, /* not yet */
> [PCI_EXT_CAP_ID_PMUX] = 0, /* not yet */
> - [PCI_EXT_CAP_ID_PASID] = 0, /* not yet */
> + [PCI_EXT_CAP_ID_PASID] = PCI_EXT_CAP_PASID_SIZEOF,
> };
>
> /*
>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Thanks
Eric
next prev parent reply other threads:[~2020-07-20 12:35 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-12 11:20 [PATCH v5 00/15] vfio: expose virtual Shared Virtual Addressing to VMs Liu Yi L
2020-07-12 11:20 ` [PATCH v5 01/15] vfio/type1: Refactor vfio_iommu_type1_ioctl() Liu Yi L
2020-07-12 11:20 ` [PATCH v5 02/15] iommu: Report domain nesting info Liu Yi L
2020-07-17 16:29 ` Auger Eric
2020-07-20 7:20 ` Liu, Yi L
2020-07-12 11:20 ` [PATCH v5 03/15] iommu/smmu: Report empty " Liu Yi L
2020-07-13 13:14 ` Will Deacon
2020-07-14 10:12 ` Liu, Yi L
2020-07-16 15:39 ` Jean-Philippe Brucker
2020-07-16 20:38 ` Auger Eric
2020-07-17 9:09 ` Jean-Philippe Brucker
2020-07-17 10:28 ` Auger Eric
2020-07-23 9:44 ` Liu, Yi L
2020-07-23 9:40 ` Liu, Yi L
2020-07-17 17:18 ` Auger Eric
2020-07-20 7:26 ` Liu, Yi L
2020-07-12 11:20 ` [PATCH v5 04/15] vfio/type1: Report iommu nesting info to userspace Liu Yi L
2020-07-17 17:34 ` Auger Eric
2020-07-20 7:51 ` Liu, Yi L
2020-07-20 8:33 ` Auger Eric
2020-07-20 8:51 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 05/15] vfio: Add PASID allocation/free support Liu Yi L
2020-07-19 15:38 ` Auger Eric
2020-07-20 8:03 ` Liu, Yi L
2020-07-20 8:26 ` Auger Eric
2020-07-20 8:49 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 06/15] iommu/vt-d: Support setting ioasid set to domain Liu Yi L
2020-07-19 15:38 ` Auger Eric
2020-07-20 8:11 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 07/15] vfio/type1: Add VFIO_IOMMU_PASID_REQUEST (alloc/free) Liu Yi L
2020-07-19 15:38 ` Auger Eric
2020-07-20 8:56 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 08/15] iommu: Pass domain to sva_unbind_gpasid() Liu Yi L
2020-07-19 15:37 ` Auger Eric
2020-07-20 9:06 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 09/15] iommu/vt-d: Check ownership for PASIDs from user-space Liu Yi L
2020-07-19 16:06 ` Auger Eric
2020-07-20 10:18 ` Liu, Yi L
2020-07-20 12:37 ` Auger Eric
2020-07-20 12:55 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 10/15] vfio/type1: Support binding guest page tables to PASID Liu Yi L
2020-07-20 9:37 ` Auger Eric
2020-07-20 10:37 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 11/15] vfio/type1: Allow invalidating first-level/stage IOMMU cache Liu Yi L
2020-07-20 9:41 ` Auger Eric
2020-07-20 10:42 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 12/15] vfio/type1: Add vSVA support for IOMMU-backed mdevs Liu Yi L
2020-07-20 12:22 ` Auger Eric
2020-07-23 12:05 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 13/15] vfio/pci: Expose PCIe PASID capability to guest Liu Yi L
2020-07-20 12:35 ` Auger Eric [this message]
2020-07-20 13:00 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 14/15] vfio: Document dual stage control Liu Yi L
2020-07-18 13:39 ` Auger Eric
2020-07-25 8:54 ` Liu, Yi L
2020-07-12 11:21 ` [PATCH v5 15/15] iommu/vt-d: Support reporting nesting capability info Liu Yi L
2020-07-17 17:14 ` Auger Eric
2020-07-20 13:33 ` Liu, Yi L
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