On 7/17/19 9:52 AM, Paolo Bonzini wrote:
On 17/07/19 14:59, Collin Walling wrote:
On 7/16/19 11:04 AM, Thomas Huth wrote:
On 16/07/2019 15.06, Markus Armbruster wrote:
Paolo Bonzini <pbonz...@redhat.com> writes:
On 15/07/19 18:12, Cornelia Huck wrote:
Is it INTx vs. MSI vs. MSI-X?
I think for s390x we need (INTx || MSI) vs MSI-X...
I think MSI vs MSI-X is just how it's configured, not the actual
behavior, so it should be irrelevant.
My best guesses from confusing information, please correct
misunderstandings:
1. PCI devices need to support MSI or MSI-X to work with s390x.
I think Cornelia mentioned that we might even require MSI-X there ...
Collin (being listed as "S390 PCI" maintainer), can you confirm?
MSI-X is mandatory for PCI devices in the s390 architecture.
How are MSI and MSI-X distinguished?
Paolo
PCI host plugging will check for the MSI-X capability on the
PCI device. If the MSI-X cap is missing, we fail device plugging.
We do not check for MSI. Only MSI-X.
Specifically, the capability is represented by PCI_CAP_ID_MSIX
in pci_regs.h
