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>,
Lucas De Marchi <lucas.demarchi@intel.com>
Subject: [Intel-gfx] [PATCH v2] vfio/pci: Refine Intel IGD OpRegion support
Date: Wed, 30 Sep 2020 00:10:38 +0800 [thread overview]
Message-ID: <20200929161038.15465-1-fred.gao@intel.com> (raw)
Bypass the IGD initialization for Intel's dgfx devices with own expansion
ROM and the host/LPC bridge config space are no longer accessed.
v2: simply test if discrete or integrated gfx device
with root bus. (Alex Williamson)
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: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Fred Gao <fred.gao@intel.com>
---
drivers/vfio/pci/vfio_pci.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f634c81998bb..9258ccfadb79 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -336,10 +336,11 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
if (!vfio_vga_disabled() && vfio_pci_is_vga(pdev))
vdev->has_vga = true;
-
+ /* Intel's dgfx should not appear on root bus */
if (vfio_pci_is_vga(pdev) &&
pdev->vendor == PCI_VENDOR_ID_INTEL &&
- IS_ENABLED(CONFIG_VFIO_PCI_IGD)) {
+ IS_ENABLED(CONFIG_VFIO_PCI_IGD) &&
+ pci_is_root_bus(pdev->bus)) {
ret = vfio_pci_igd_init(vdev);
if (ret) {
pci_warn(pdev, "Failed to setup Intel IGD regions\n");
--
2.24.1.1.gb6d4d82bd5
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next reply other threads:[~2020-09-29 8:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 16:10 Fred Gao [this message]
2020-09-29 8:49 ` [Intel-gfx] [PATCH v2] vfio/pci: Refine Intel IGD OpRegion support 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 ` [Intel-gfx] [PATCH v2] vfio/pci: Refine Intel IGD OpRegion support 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 ` [Intel-gfx] [PATCH v3] vfio/pci: Bypass IGD init in case of -ENODEV Fred Gao
2020-11-03 18:21 ` Alex Williamson
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=20200929161038.15465-1-fred.gao@intel.com \
--to=fred.gao@intel.com \
--cc=hang.yuan@linux.intel.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=kvm@vger.kernel.org \
--cc=lucas.demarchi@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