From: "Liu, Yi L" <yi.l.liu@intel.com>
To: alex.williamson@redhat.com, eric.auger@redhat.com
Cc: kevin.tian@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org,
jean-philippe.brucker@arm.com, jun.j.tian@intel.com,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
yi.y.sun@intel.com
Subject: [RFC v1 1/2] vfio/pci: Expose PCIe PASID capability to guest
Date: Wed, 29 Jan 2020 04:18:44 -0800 [thread overview]
Message-ID: <1580300325-86259-2-git-send-email-yi.l.liu@intel.com> (raw)
In-Reply-To: <1580300325-86259-1-git-send-email-yi.l.liu@intel.com>
From: Liu Yi L <yi.l.liu@intel.com>
This patch exposes PCIe PASID capability to guest. Existing vfio_pci
driver hides it from guest by setting the capability length as 0 in
pci_ext_cap_length[].
This capability is required for vSVA enabling on pass-through PCIe
devices.
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.brucker@arm.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
---
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 90c0b80..4b9af99 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,
};
/*
--
2.7.4
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-01-29 12:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-29 12:18 [RFC v1 0/2] vfio/pci: expose device's PASID capability to VMs Liu, Yi L
2020-01-29 12:18 ` Liu, Yi L [this message]
2020-01-29 12:18 ` [RFC v1 2/2] vfio/pci: Emulate PASID/PRI capability for VFs Liu, Yi L
2020-02-08 7:46 ` [RFC v1 0/2] vfio/pci: expose device's PASID capability to VMs Liu, Yi L
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1580300325-86259-2-git-send-email-yi.l.liu@intel.com \
--to=yi.l.liu@intel.com \
--cc=alex.williamson@redhat.com \
--cc=ashok.raj@intel.com \
--cc=eric.auger@redhat.com \
--cc=iommu@lists.linux-foundation.org \
--cc=jean-philippe.brucker@arm.com \
--cc=jun.j.tian@intel.com \
--cc=kevin.tian@intel.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=yi.y.sun@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).