On 11/08/2015 10:30 AM, Wei Yang wrote:
This patchset enables EEH on SRIOV VFs. The general idea is to create proper VF edev and VF PE and handle them properly. Different from the Bus PE, VF PE just contain one VF. This introduces the difference of EEH error handling on a VF PE. Generally, it has several differences. First, the VF's removal and re-enumerate rely on its PF. VF has a tight relationship between its PF. This is not proper to enumerate a VF by usual scan procedure. That's why virtfn_add/virtfn_remove are exported in this patch set. Second, the reset/restore of a VF is done in kernel space. FW is not aware of the VF, this means the usual reset function done in FW will not work. One of the patch will imitate the reset/restore function in kernel space. Third, the VF may be removed during the PF's error_detected function. In this case, the original error_detected->slot_reset->resume sequence is not proper to those removed VFs, since they are re-created by PF in a fresh state. A flag in eeh_dev is introduce to mark the eeh_dev is in error state. By doing so, we track whether this device needs to be reset or not. This has been tested both on host and in guest on Power8 with latest kernel version.
This does not apply on top of neither Linus master tree (git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git sha1 ce5c2d2) nor Michael's PPC next tree (git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git sha1 8bdf2023). What did you base your work on?
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