diff options
author | Peter Xu <peterx@redhat.com> | 2016-05-17 19:26:10 +0800 |
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committer | Michael S. Tsirkin <mst@redhat.com> | 2016-06-17 03:28:02 +0300 |
commit | 4a94b3aa6d97dfa67a20c7a0315c9773352f0e8e (patch) | |
tree | 9c12a5330bb5d1ed0f3ad4591d56940e45bd8b1c /net/checksum.c | |
parent | 49237b856ae58ee7955be0b959c504c51b014f20 (diff) |
pci: fix pci_requester_id()
This fix SID verification failure when IOMMU IR is enabled with PCI
bridges. Existing pci_requester_id() is more like getting BDF info
only. Renaming it to pci_get_bdf(). Meanwhile, we provide the correct
implementation to get requester ID. VT-d spec 5.1.1 is a good reference
to go, though it talks only about interrupt delivery, the rule works
exactly the same for non-interrupt cases.
Currently, there are three use cases for pci_requester_id():
- PCIX status bits: here we need BDF only, not requester ID. Replacing
with pci_get_bdf().
- PCIe Error injection and MSI delivery: for both these cases, we are
looking for requester IDs. Here we should use the new impl.
To avoid a PCI walk every time we send MSI message, one requester_id
cache field is added to PCIDevice to cache the result when initialize
PCI device.
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'net/checksum.c')
0 files changed, 0 insertions, 0 deletions