On 2021/2/18 17:33, David Marchand wrote:
On Fri, Jan 29, 2021 at 4:19 AM 谢华伟(此时此刻) <huawei....@alibaba-inc.com> wrote:
From: "huawei.xhw" <huawei....@alibaba-inc.com>

Currently virtio PMD asssumes legacy device uses PIO bar.
There are three ways to get PIO(PortIO) address for virtio legacy device.
     under igb_uio, get pio address from uio/uio# sysfs attribute
     under uio_pci_generic:
         for X86, get PIO address from /proc/ioport
         for other ARCH, get PIO address from standard PCI sysfs attribute

Actually, igb_uio sysfs attribute exports exactly the same thing as standard 
PCI sysfs, i.e,
     pci_dev->resource[]

This patch fixes these messy things, and uses standard PCI sysfs attribute.
I can not find what is being fixed.
Could you elaborate?

Maybe i wrongly use the word fix?  With this patch, different drivers use the same way to get IO address for virtio device.

Previously different driver get IO address with different method.


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