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[Qemu-devel] [RFC PATCH v3 00/18] spapr: vfio: Enable Dynamic DMA window
From: |
Alexey Kardashevskiy |
Subject: |
[Qemu-devel] [RFC PATCH v3 00/18] spapr: vfio: Enable Dynamic DMA windows (DDW) |
Date: |
Fri, 29 Aug 2014 20:12:04 +1000 |
At the moment sPAPR PHB supports only a single 32bit window
which is normally 1..2GB which is not enough for high performance devices.
PAPR spec enables creating an additional window(s) to support 64bit
DMA and bigger page sizes.
This patchset adds DDW support for pseries. The host kernel changes are
required, posted earlier today as:
[PATCH 00/13] powerpc/iommu/vfio: Enable Dynamic DMA windows
This was tested on POWER8 system which allows one additional DMA window
which is mapped at 0x800.0000.0000.0000 and supports 16MB pages.
Existing guests check for DDW capabilities in PHB's device tree and if it
is present, they request for an additional window and map entire guest RAM
using H_PUT_TCE/... hypercalls once at boot time and switch to direct DMA
operations.
TCE tables still may be big enough for guests backed with 64K pages but they
are reasonably small for guests backed by 16MB pages.
Please comment. Thanks!
Changes:
v3:
* removed "reset" from API now
* reworked machine versions
* applied multiple comments
* includes David's machine QOM rework as this patchset adds a new machine type
v2:
* tested on emulated PHB
* removed "ddw" machine property, now it is PHB property
* disabled by default
* defined "pseries-2.2" machine which enables DDW by default
* fixed reset() and reference counting
Alexey Kardashevskiy (17):
qom: Make object_child_foreach safe for objects removal
spapr_iommu: Disable in-kernel IOMMU tables for >4GB windows
spapr_pci: Introduce a liobn number generating macros
spapr_vio: Introduce a liobn number generating macros
spapr_pci: Make find_phb()/find_dev() public
spapr_iommu: Make spapr_tce_find_by_liobn() public
spapr_iommu: Implement free_table() helper
spapr_rtas: Reserve DDW RTAS token numbers
spapr_pci: Define DDW callbacks
spapr_pci: Add windows counter
spapr_rtas: Add Dynamic DMA windows (DDW) RTAS calls support
spapr_pci: Enable DDW
spapr_pci_vfio: Call spapr_pci::reset on reset
linux headers update for SPAPR (DDW + EEH)
spapr_pci_vfio: Enable DDW
vfio: Enable DDW ioctls to VFIO IOMMU driver
spapr: Add pseries-2.2 machine
David Gibson (1):
spapr: Make machine naming conventions closer to those for PC
hw/misc/vfio.c | 2 +
hw/ppc/Makefile.objs | 3 +
hw/ppc/spapr.c | 29 +++++-
hw/ppc/spapr_iommu.c | 18 +++-
hw/ppc/spapr_pci.c | 127 +++++++++++++++++++++---
hw/ppc/spapr_pci_vfio.c | 78 ++++++++++++++-
hw/ppc/spapr_rtas_ddw.c | 234 ++++++++++++++++++++++++++++++++++++++++++++
hw/ppc/spapr_vio.c | 2 +-
include/hw/pci-host/spapr.h | 30 ++++++
include/hw/ppc/spapr.h | 13 ++-
linux-headers/linux/vfio.h | 58 ++++++++++-
qom/object.c | 4 +-
trace-events | 3 +
13 files changed, 569 insertions(+), 32 deletions(-)
create mode 100644 hw/ppc/spapr_rtas_ddw.c
--
2.0.0
- [Qemu-devel] [RFC PATCH v3 00/18] spapr: vfio: Enable Dynamic DMA windows (DDW),
Alexey Kardashevskiy <=
- [Qemu-devel] [RFC PATCH v3 01/18] spapr: Make machine naming conventions closer to those for PC, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 05/18] spapr_vio: Introduce a liobn number generating macros, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 03/18] spapr_iommu: Disable in-kernel IOMMU tables for >4GB windows, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 07/18] spapr_iommu: Make spapr_tce_find_by_liobn() public, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 04/18] spapr_pci: Introduce a liobn number generating macros, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 08/18] spapr_iommu: Implement free_table() helper, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 09/18] spapr_rtas: Reserve DDW RTAS token numbers, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 17/18] vfio: Enable DDW ioctls to VFIO IOMMU driver, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 11/18] spapr_pci: Add windows counter, Alexey Kardashevskiy, 2014/08/29
- [Qemu-devel] [RFC PATCH v3 06/18] spapr_pci: Make find_phb()/find_dev() public, Alexey Kardashevskiy, 2014/08/29