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[Qemu-devel] [RFC] AMD IOMMU: emulate multiple devices
From: |
David Kiarie |
Subject: |
[Qemu-devel] [RFC] AMD IOMMU: emulate multiple devices |
Date: |
Sun, 5 Jun 2016 19:54:32 +0300 |
Hello all,
This patch tries to solve a problem whereby real AMD IOMMUs exhibit both PCI
and Platform device properties. AMD IOMMU properties that conflict with
conventional PCI devices' features include the fact that its not a BusMaster
device, reserves MMIO region without a BAR register.
There is some already ongoing work on Intel IOMMU Interrupt remapping with
implements an IOMMU base class, as a platform device(which means the moment I
inherit from this class my device loses it's PCI properties). I am therefore
forced to find a way to combine both PCI and platform features(which I had
previously avoided) into AMD IOMMU.
This patch implements a dummy PCI device which serves to 'steal' PCI config
space while the rest of the device remains a platform device. The platform
device maintains a reference to the PCI and hence the relevant PCI config
space. Please ignore details in this patch and review the design. Also, some of
the changes here are not related to the above issue.
Looking forward to your comments!
David Kiarie (1):
Allow AMD IOMMU to have both SysBusDevice and PCIDevice properties.
hw/acpi/aml-build.c | 2 +-
hw/i386/amd_iommu.c | 1471 +++++++++++++++++++++++++++++++++++++++++++
hw/i386/amd_iommu.h | 348 ++++++++++
hw/i386/kvm/pci-assign.c | 2 +-
hw/i386/pc_q35.c | 1 +
include/hw/acpi/acpi-defs.h | 13 +
include/hw/acpi/aml-build.h | 1 +
include/hw/pci/pci.h | 10 +-
qemu-options.hx | 7 +-
util/qemu-config.c | 8 +-
10 files changed, 1853 insertions(+), 10 deletions(-)
create mode 100644 hw/i386/amd_iommu.c
create mode 100644 hw/i386/amd_iommu.h
--
2.1.4
- [Qemu-devel] [RFC] AMD IOMMU: emulate multiple devices,
David Kiarie <=