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vfio/pci: Add pba_offset PCI quirk for BAIDU KUNLUN AI processor

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Fix pba_offset initialization value for BAIDU KUNLUN Virtual
Function device. The KUNLUN hardware returns an incorrect
value for the VF PBA offset, and add a quirk to instead
return a hardcoded value of 0xb400.

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Link: https://lore.kernel.org/r/20210713093743.942-1-caihuoqing@baidu.com
[aw: comment & whitespace tuning]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Cai Huoqing 2021-07-13 17:37:43 +08:00 • committed by Alex Williamson
parent 936555bc4f
commit 1bd9f1b14d
2 changed files with 11 additions and 0 deletions
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8
hw/vfio/pci.c
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@ -1499,6 +1499,14 @@ static void vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
if (vdev->vendor_id == PCI_VENDOR_ID_CHELSIO &&
(vdev->device_id & 0xff00) == 0x5800) {
msix->pba_offset = 0x1000;
/*
* BAIDU KUNLUN Virtual Function devices for KUNLUN AI processor
* return an incorrect value of 0x460000 for the VF PBA offset while
* the BAR itself is only 0x10000. The correct value is 0xb400.
*/
} else if (vfio_pci_is(vdev, PCI_VENDOR_ID_BAIDU,
PCI_DEVICE_ID_KUNLUN_VF)) {
msix->pba_offset = 0xb400;
} else if (vdev->msix_relo == OFF_AUTOPCIBAR_OFF) {
error_setg(errp, "hardware reports invalid configuration, "
"MSIX PBA outside of specified BAR");