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From: Fred Gao <fred.gao@intel.com>
To: kvm@vger.kernel.org, intel-gfx@lists.freedesktop.org
Cc: Fred Gao <fred.gao@intel.com>,
	Zhenyu Wang <zhenyuw@linux.intel.com>,
	Xiong Zhang <xiong.y.zhang@intel.com>,
	Hang Yuan <hang.yuan@linux.intel.com>,
	Stuart Summers <stuart.summers@intel.com>
Subject: [PATCH v3] vfio/pci: Bypass IGD init in case of -ENODEV
Date: Tue,  3 Nov 2020 02:01:20 +0800	[thread overview]
Message-ID: <20201102180120.25319-1-fred.gao@intel.com> (raw)
In-Reply-To: <20200929161038.15465-1-fred.gao@intel.com>

Bypass the IGD initialization when -ENODEV returns,
that should be the case if opregion is not available for IGD
or within discrete graphics device's option ROM,
or host/lpc bridge is not found.

Then use of -ENODEV here means no special device resources found
which needs special care for VFIO, but we still allow other normal
device resource access.

Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Xiong Zhang <xiong.y.zhang@intel.com>
Cc: Hang Yuan <hang.yuan@linux.intel.com>
Cc: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Fred Gao <fred.gao@intel.com>
---
 drivers/vfio/pci/vfio_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f634c81998bb..c88cf9937469 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -341,7 +341,7 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
 	    pdev->vendor == PCI_VENDOR_ID_INTEL &&
 	    IS_ENABLED(CONFIG_VFIO_PCI_IGD)) {
 		ret = vfio_pci_igd_init(vdev);
-		if (ret) {
+		if (ret && ret != -ENODEV) {
 			pci_warn(pdev, "Failed to setup Intel IGD regions\n");
 			goto disable_exit;
 		}
-- 
2.24.1.1.gb6d4d82bd5


WARNING: multiple messages have this Message-ID (diff)
From: Fred Gao <fred.gao@intel.com>
To: kvm@vger.kernel.org, intel-gfx@lists.freedesktop.org
Cc: Fred Gao <fred.gao@intel.com>, Hang Yuan <hang.yuan@linux.intel.com>
Subject: [Intel-gfx] [PATCH v3] vfio/pci: Bypass IGD init in case of -ENODEV
Date: Tue,  3 Nov 2020 02:01:20 +0800	[thread overview]
Message-ID: <20201102180120.25319-1-fred.gao@intel.com> (raw)
In-Reply-To: <20200929161038.15465-1-fred.gao@intel.com>

Bypass the IGD initialization when -ENODEV returns,
that should be the case if opregion is not available for IGD
or within discrete graphics device's option ROM,
or host/lpc bridge is not found.

Then use of -ENODEV here means no special device resources found
which needs special care for VFIO, but we still allow other normal
device resource access.

Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Xiong Zhang <xiong.y.zhang@intel.com>
Cc: Hang Yuan <hang.yuan@linux.intel.com>
Cc: Stuart Summers <stuart.summers@intel.com>
Signed-off-by: Fred Gao <fred.gao@intel.com>
---
 drivers/vfio/pci/vfio_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f634c81998bb..c88cf9937469 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -341,7 +341,7 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
 	    pdev->vendor == PCI_VENDOR_ID_INTEL &&
 	    IS_ENABLED(CONFIG_VFIO_PCI_IGD)) {
 		ret = vfio_pci_igd_init(vdev);
-		if (ret) {
+		if (ret && ret != -ENODEV) {
 			pci_warn(pdev, "Failed to setup Intel IGD regions\n");
 			goto disable_exit;
 		}
-- 
2.24.1.1.gb6d4d82bd5

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

  parent reply	other threads:[~2020-11-02 10:06 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-29 16:10 [PATCH v2] vfio/pci: Refine Intel IGD OpRegion support Fred Gao
2020-09-29 16:10 ` [Intel-gfx] " Fred Gao
2020-09-29  8:49 ` Zhenyu Wang
2020-09-29  8:49   ` [Intel-gfx] " Zhenyu Wang
2020-09-29 19:19 ` [Intel-gfx] ✓ Fi.CI.IGT: success for vfio/pci: Refine Intel IGD OpRegion support (rev2) Patchwork
2020-09-29 22:06 ` [PATCH v2] vfio/pci: Refine Intel IGD OpRegion support Alex Williamson
2020-09-29 22:06   ` [Intel-gfx] " Alex Williamson
2020-11-02 11:48 ` [Intel-gfx] ✓ Fi.CI.BAT: success for vfio/pci: Refine Intel IGD OpRegion support (rev3) Patchwork
2020-11-02 16:13 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2020-11-02 18:01 ` Fred Gao [this message]
2020-11-02 18:01   ` [Intel-gfx] [PATCH v3] vfio/pci: Bypass IGD init in case of -ENODEV Fred Gao
2020-11-03 18:21   ` Alex Williamson
2020-11-03 18:21     ` [Intel-gfx] " Alex Williamson

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