[Qemu-devel] [for-4.0 PATCH v3 7/9] vfio/pci: Remove PCIe Link Status emulation

Alex Williamson posted 9 patches 7 years ago
There is a newer version of this series
[Qemu-devel] [for-4.0 PATCH v3 7/9] vfio/pci: Remove PCIe Link Status emulation
Posted by Alex Williamson 7 years ago
Now that the downstream port will virtually negotiate itself to the
link status of the downstream devie, we can remove this emulation.
It's not clear that it was every terribly useful anyway.

Tested-by: Geoffrey McRae <geoff@hostfission.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
 hw/vfio/pci.c |    6 ------
 1 file changed, 6 deletions(-)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 74f9a46b4be0..c0cb1ec28908 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -1901,12 +1901,6 @@ static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size,
                            QEMU_PCI_EXP_LNKCAP_MLS(QEMU_PCI_EXP_LNK_2_5GT), ~0);
             vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
         }
-
-        /* Mark the Link Status bits as emulated to allow virtual negotiation */
-        vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA,
-                               pci_get_word(vdev->pdev.config + pos +
-                                            PCI_EXP_LNKSTA),
-                               PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
     }
 
     /*


Re: [Qemu-devel] [for-4.0 PATCH v3 7/9] vfio/pci: Remove PCIe Link Status emulation
Posted by Auger Eric 7 years ago
Hi
On 12/4/18 5:27 PM, Alex Williamson wrote:
> Now that the downstream port will virtually negotiate itself to the
> link status of the downstream devie, we can remove this emulation.
s/devie/device
> It's not clear that it was every terribly useful anyway.
> 
> Tested-by: Geoffrey McRae <geoff@hostfission.com>
> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

> ---
>  hw/vfio/pci.c |    6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
> index 74f9a46b4be0..c0cb1ec28908 100644
> --- a/hw/vfio/pci.c
> +++ b/hw/vfio/pci.c
> @@ -1901,12 +1901,6 @@ static int vfio_setup_pcie_cap(VFIOPCIDevice *vdev, int pos, uint8_t size,
>                             QEMU_PCI_EXP_LNKCAP_MLS(QEMU_PCI_EXP_LNK_2_5GT), ~0);
>              vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
>          }
> -
> -        /* Mark the Link Status bits as emulated to allow virtual negotiation */
> -        vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA,
> -                               pci_get_word(vdev->pdev.config + pos +
> -                                            PCI_EXP_LNKSTA),
> -                               PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);

Reviewed-by: Eric Auger <eric.auger@redhat.com>

Thanks

Eric
>      }
>  
>      /*
> 
>