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[Qemu-devel] [PATCH 0/7] s390x/pci: Improve zPCI to cover more cases
From: |
Pierre Morel |
Subject: |
[Qemu-devel] [PATCH 0/7] s390x/pci: Improve zPCI to cover more cases |
Date: |
Tue, 7 Nov 2017 18:24:32 +0100 |
Right now the PCI support is very limited (e.g. pass through of a
host vfio device)
To enable features like virtio-pci several modifications needs to be
done.
Virtio-PCI uses subregions, which may eventually be discontinuous
inside bars instead of a single flat region.
The address offset being formerly calculated from the BAR base address
must be adapted to the subregions instead of to the single region.
This patch provides the new calculation for the three kind of BAR
access, zPCI STORE, zPCI LOAD and zPCI STORE BLOCK.
We use the opportunity to
- enhance the fault detection for zPCI STORE and LOAD,
- enhance the fault detection and to provide the maximum STORE BLOCK
block size, maxstbl, for zPCI STORE BLOCK
- factor out part of the code used to calculate the offset and
access the BARs,
- factor out the code for endianess conversion.
Pierre Morel (7):
s390x/pci: factor out endianess conversion
s390x/pci: rework PCI STORE
s390x/pci: rework PCI LOAD
s390x/pci: rework PCI STORE BLOCK
s390x/pci: move the memory region read from pcilg
s390x/pci: move the memory region write from pcistg
s390x/pci: search for subregion inside the BARs
hw/s390x/s390-pci-bus.h | 1 +
hw/s390x/s390-pci-inst.c | 250 ++++++++++++++++++++++++++++-------------------
hw/s390x/s390-pci-inst.h | 2 +-
3 files changed, 153 insertions(+), 100 deletions(-)
--
2.7.4
- [Qemu-devel] [PATCH 0/7] s390x/pci: Improve zPCI to cover more cases,
Pierre Morel <=
[Qemu-devel] [PATCH 1/7] s390x/pci: factor out endianess conversion, Pierre Morel, 2017/11/07