On 05.07.2016 16:21, Valentine Sinitsyn wrote:
Hi all,
I faced a strange issue regarding MSI-X on my board.
A USB host (xchi_hcd) enables 5 MSI-X vectors out of 8.
The problem is other three vectors remain unmasked (at least, according
to dev->msi_vectors in Jailhouse), even if they store all-zeros. The PCI
spec says all vectors must be masked on reset (which sounds sane).
What's this? A bug in the kernel/driver? A config issue? Has anyone
tested Jailhouse in conjunction with MSI-X?
Just looked into the MSI-X table. It really has all vectors unmasked
even before Jailhouse gets into play.
Looks like a BIOS/hardware issue to me. If it is so, shall we work
around it in the Jailhouse somehow?
Valentine
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