Commit 9e60ee0e authored by Piotr Piórkowski's avatar Piotr Piórkowski Committed by Michał Winiarski
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vfio/xe: Notify PF about VF FLR in reset_prepare 



Hook into the PCI error handler reset_prepare() callback to notify
the PF about an upcoming VF FLR before reset_done() is executed.
This enables early FLR_PREPARE signaling and ensures that the PF is
aware of the reset before the completion wait begins.

Signed-off-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
Reviewed-by: default avatarAlex Williamson <alex@shazbot.org>
Link: https://patch.msgid.link/20260309152449.910636-3-piotr.piorkowski@intel.com


Signed-off-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
parent 2de36e3f

drivers/vfio/pci/xe/main.c

+14 −0
Original line number Diff line number Diff line
@@ -85,6 +85,19 @@ static void xe_vfio_pci_state_mutex_unlock(struct xe_vfio_pci_core_device *xe_vd 
	spin_unlock(&xe_vdev->reset_lock);

}



static void xe_vfio_pci_reset_prepare(struct pci_dev *pdev)

{

	struct xe_vfio_pci_core_device *xe_vdev = pci_get_drvdata(pdev);

	int ret;



	if (!pdev->is_virtfn)

		return;



	ret = xe_sriov_vfio_flr_prepare(xe_vdev->xe, xe_vdev->vfid);

	if (ret)

		dev_err(&pdev->dev, "Failed to prepare FLR: %d\n", ret);

}



static void xe_vfio_pci_reset_done(struct pci_dev *pdev)

{

	struct xe_vfio_pci_core_device *xe_vdev = pci_get_drvdata(pdev);
@@ -127,6 +140,7 @@ static void xe_vfio_pci_reset_done(struct pci_dev *pdev) 
}



static const struct pci_error_handlers xe_vfio_pci_err_handlers = {

	.reset_prepare = xe_vfio_pci_reset_prepare,

	.reset_done = xe_vfio_pci_reset_done,

	.error_detected = vfio_pci_core_aer_err_detected,

};