From 1bd9f1b14d1e9c1498bb03faf4e2bb945cf6542d Mon Sep 17 00:00:00 2001 From: Cai Huoqing Date: Tue, 13 Jul 2021 17:37:43 +0800 Subject: [PATCH] vfio/pci: Add pba_offset PCI quirk for BAIDU KUNLUN AI processor 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 Link: https://lore.kernel.org/r/20210713093743.942-1-caihuoqing@baidu.com [aw: comment & whitespace tuning] Signed-off-by: Alex Williamson --- hw/vfio/pci.c | 8 ++++++++ include/hw/pci/pci_ids.h | 3 +++ 2 files changed, 11 insertions(+) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 971273fd45..e1ea1d8a23 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -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"); diff --git a/include/hw/pci/pci_ids.h b/include/hw/pci/pci_ids.h index 5c14681b82..11abe22d46 100644 --- a/include/hw/pci/pci_ids.h +++ b/include/hw/pci/pci_ids.h @@ -227,6 +227,9 @@ #define PCI_VENDOR_ID_FREESCALE 0x1957 #define PCI_DEVICE_ID_MPC8533E 0x0030 +#define PCI_VENDOR_ID_BAIDU 0x1d22 +#define PCI_DEVICE_ID_KUNLUN_VF 0x3685 + #define PCI_VENDOR_ID_INTEL 0x8086 #define PCI_DEVICE_ID_INTEL_82378 0x0484 #define PCI_DEVICE_ID_INTEL_82441 0x1237 -- 2.11.0