[PATCH RESEND v2 0/3] To add HMP interface to dump PCI MSI-X table/PBA

[Dongli Zhang]

I have just rebased the v2 patchset on top of most recent qemu to resend.

This patch is to introduce the new HMP command to dump the MSI-X table/PBA.

Here is the RFC v1:

https://lists.gnu.org/archive/html/qemu-devel/2021-04/msg04673.html

The idea was inspired by below discussion:

https://lists.gnu.org/archive/html/qemu-devel/2021-03/msg09020.html


(qemu) info msix -d /machine/peripheral/vscsi0
Msg L.Addr Msg U.Addr Msg Data   Vect Ctrl
0xfee00000 0x00000000 0x00004041 0x00000000
0xfee00000 0x00000000 0x00004051 0x00000000
0xfee00000 0x00000000 0x00004061 0x00000000
0xfee00000 0x00000000 0x00004071 0x00000000
0xfee01000 0x00000000 0x000040b1 0x00000000
0xfee02000 0x00000000 0x000040c1 0x00000000
0xfee03000 0x00000000 0x000040d1 0x00000000

MSI-X PBA
0 0 0 0 0 0 0

virtio pci vector info:
config: 0
queue 0: 1
queue 1: 2
queue 2: 3
queue 3: 4
queue 4: 5
queue 5: 6


Changed since RFC v1:
  - Add heading to MSI-X table (suggested by David Alan Gilbert)
  - Add device specific interface, e.g., to dump virtio-pci queue-to-vector
    mapping (Suggested By Jason)


 hmp-commands-info.hx       | 14 +++++++++
 hw/pci/msix.c              | 63 +++++++++++++++++++++++++++++++++++++++++
 hw/virtio/virtio-pci.c     | 22 ++++++++++++++
 hw/virtio/virtio.c         | 10 +++++++
 include/hw/pci/msix.h      |  2 ++
 include/hw/pci/pci.h       |  3 ++
 include/hw/virtio/virtio.h |  2 ++
 include/monitor/hmp.h      |  1 +
 softmmu/qdev-monitor.c     | 36 +++++++++++++++++++++++
 9 files changed, 153 insertions(+)

Thank you very much!

Dongli Zhang