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[PATCH v14 1/2] arm/pci: add pci_passhtrough_enabled check to pci_device_reset
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>
- Date: Thu, 24 Jul 2025 09:44:36 +0000
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- Cc: Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Delivery-date: Thu, 24 Jul 2025 09:44:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHb/H+RZz72CuYaAEmAjKB8JLwIEg==
- Thread-topic: [PATCH v14 1/2] arm/pci: add pci_passhtrough_enabled check to pci_device_reset
On Arm without pci-passthrough=on Xen does not know anything about
present PCI devices due to PHYSDEVOP_pci_device_add not executing. This
causes PHYSDEVOP_pci_device_reset to fail when trying to find the device
that is being reset and return ENODEV.
Add explicit is_pci_passthrough_enabled check to return a more
meaningful EOPNOTSUPP code.
This change should not affect x86 behavior as pci-passthrough is always
enabled there.
Signed-off-by: Mykyta Poturai <mykyta_poturai@xxxxxxxx>
---
v13->v14:
* clarify the commit message
v13:
* new patch
---
xen/drivers/pci/physdev.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/xen/drivers/pci/physdev.c b/xen/drivers/pci/physdev.c
index 0161a85e1e..78de67ec64 100644
--- a/xen/drivers/pci/physdev.c
+++ b/xen/drivers/pci/physdev.c
@@ -74,6 +74,9 @@ ret_t pci_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void)
arg)
struct pci_dev *pdev;
pci_sbdf_t sbdf;
+ if ( !is_pci_passthrough_enabled() )
+ return -EOPNOTSUPP;
+
ret = -EFAULT;
if ( copy_from_guest(&dev_reset, arg, 1) != 0 )
break;
--
2.34.1
|
