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From: "Liu, Yi L" <yi.l.liu@intel.com>
To: alex.williamson@redhat.com, eric.auger@redhat.com
Cc: kevin.tian@intel.com, jacob.jun.pan@linux.intel.com,
	joro@8bytes.org, ashok.raj@intel.com, yi.l.liu@intel.com,
	jun.j.tian@intel.com, yi.y.sun@intel.com,
	jean-philippe.brucker@arm.com, peterx@redhat.com,
	iommu@lists.linux-foundation.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org
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


WARNING: multiple messages have this Message-ID (diff)
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

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  reply	other threads:[~2020-01-29 12:13 UTC|newest]

Thread overview: 8+ 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
2020-01-29 12:18 ` Liu, Yi L [this message]
2020-01-29 12:18   ` [RFC v1 1/2] vfio/pci: Expose PCIe PASID capability to guest Liu, Yi L
2020-01-29 12:18 ` [RFC v1 2/2] vfio/pci: Emulate PASID/PRI capability for VFs Liu, Yi L
2020-01-29 12:18   ` Liu, Yi L
2020-02-08  7:46 ` [RFC v1 0/2] vfio/pci: expose device's PASID capability to VMs Liu, Yi L
2020-02-08  7:46   ` Liu, Yi L

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