[PATCH 0/4] Xen: Add Q35 initial support for HVM guests

["Thierry Escande" <thierry.escande@xxxxxxxxxx>]

This patch series introduces Q35 chipset support for Xen HVM guests. This is
based on the work from Alexey Gerasimenko (See patchset [1] for reference).

This series does not implement device passthrough as this will need more work
on the Xen side to support multiple PCI buses. Since Q35 chipset does not
support device hotplugging and with current Xen mechanism for device
passthrough, they have to be plugged to a new PCIe root port, i.e. not the PCI
bus 0.

As a first step for Q35 guests support, this series implements:
- Legacy interrupt routing for the ICH9 LPC bridge (i.e. not IOAPIC)
- Xen HVM machine initialization in pc_q35_init()
- Access to PCIe Extended Config Space
- Fix for incorrect values and usage for PCIEXBAR masks

The corresponding patchset for the Xen Project has been posted at [2].

[1] https://lore.kernel.org/xen-devel/cover.1520867740.git.x1917x@xxxxxxxxx/
[2] 
https://lore.kernel.org/xen-devel/20260313163455.790692-1-thierry.escande@xxxxxxxxxx/

Alexey Gerasimenko (2):
  pc/xen: Xen Q35 support: provide IRQ handling for PCI devices
  q35: Fix incorrect values for PCIEXBAR masks

Thierry Escande (2):
  q35/xen: Add Xen support for Q35
  xen: Handle PCIe config space size in cpu_ioreq_config()

 hw/i386/pc_piix.c         |  2 --
 hw/i386/pc_q35.c          | 12 +++++++++++-
 hw/i386/xen/xen-hvm.c     | 38 ++++++++++++++++++++++++++++++++++++++
 hw/isa/lpc_ich9.c         | 16 +++++++++++++---
 hw/pci-host/q35.c         |  6 +++---
 hw/xen/xen-hvm-common.c   | 11 +++++++----
 include/hw/pci-host/q35.h |  4 ++--
 include/hw/xen/xen.h      |  5 +++++
 stubs/xen-hw-stub.c       |  4 ++++
 9 files changed, 83 insertions(+), 15 deletions(-)

-- 
2.51.0



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Thierry Escande | Vates XCP-ng Developer

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