This series introduces the emulation code for ARM SMMUv3.
This is the continuation of Prem's work [1].
This v4 is yet another visibility step as many restrictions apply
to the model at the moment:
- only VMSAv8-64 is supported (no VMSAv8-32)
- only stage 1 has been tested (Block PTE still needs to be
implemented and tested though)
- no integration with VFIO. We are missing some quirks to force
the guest to invalidate TLBs when updating the page tables.
But replay will be easily implemented upon new page table scan.
- stage 2 is not supported. There is partial support when decoding
configuration information but no support at page table walk level.
This is my next step.
- at the moment I don't plan to support nested S1 + S2 as I
understand no SW stack uses it at the moment.
- no support for HYP mappings
- register fine emulation, commands, interrupts and errors were
not accurately tested. Handling is sufficient to run a guest
with a virtio-net-pci device using dma ops.
- At the moment no change to the PCIe instantiation (further
discussions about SMMUv2 TBUs versus SMMUv3 TLBs needed).
- In ACPI mode, the guest must feature the IOMMU probe deferral
series wich fixes streamid multiple lookup
The smmu is instantiated when passing the smmu option to machvirt:
"-M virt-2.10,smmu"
Best Regards
Eric
This series can be found at:
v4: https://github.com/eauger/qemu/tree/v2.9-SMMU-v4
Testing:
- booted a 4.11 guest in dt and acpi mode with an iommu_platform
virtio-net-pci device (using dma ops). Tested with the following
guest combinations: 4K page - 39 bit VA, 4K - 48b, 64K - 39b,
64K - 48b.
- Also Prem's unit test environment was rebased (available upon
demand)
References:
[1] Prem's last iteration:
- https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg03531.html
History:
v3 -> v4 [Eric]:
- page table walk rewritten to allow scan of the page table within a
range of IOVA. This prepares for VFIO integration and replay.
- configuration parsing partially reworked.
- do not advertise unsupported/untested features: S2, S1 + S2, HYP,
PRI, ATS, ..
- added ACPI table generation
- migrated to dynamic traces
- mingw compilation fix
v2 -> v3 [Eric]:
- rebased on 2.9
- mostly code and patch reorganization to ease the review process
- optional patches removed. They may be handled separately. I am currently
working on ACPI enablement.
- optional instantiation of the smmu in mach-virt
- removed [2/9] (fdt functions) since not mandated
- start splitting main patch into base and derived object
- no new function feature added
v1 -> v2 [Prem]:
- Adopted review comments from Eric Auger
- Make SMMU_DPRINTF to internally call qemu_log
(since translation requests are too many, we need control
on the type of log we want)
- SMMUTransCfg modified to suite simplicity
- Change RegInfo to uint64 register array
- Code cleanup
- Test cleanups
- Reshuffled patches
v0 -> v1 [Prem]:
- As per SMMUv3 spec 16.0 (only is_ste_consistant() is noticeable)
- Reworked register access/update logic
- Factored out translation code for
- single point bug fix
- sharing/removal in future
- (optional) Unit tests added, with PCI test device
- S1 with 4k/64k, S1+S2 with 4k/64k
- (S1 or S2) only can be verified by Linux 4.7 driver
- (optional) Priliminary ACPI support
v0 [Prem]:
- Implements SMMUv3 spec 11.0
- Supported for PCIe devices,
- Command Queue and Event Queue supported
- LPAE only, S1 is supported and Tested, S2 not tested
- BE mode Translation not supported
- IRQ support (legacy, no MSI)
- Tested with DPDK and e1000
Eric Auger (2):
hw/arm/smmu-common: smmu base class
hw/arm/virt: Add 2.10 machine type
Prem Mallappa (3):
hw/arm/smmuv3: smmuv3 emulation model
hw/arm/virt: Add SMMUv3 to the virt board
hw/arm/virt-acpi-build: add smmuv3 node in IORT table
default-configs/aarch64-softmmu.mak | 1 +
hw/arm/Makefile.objs | 1 +
hw/arm/smmu-common.c | 419 +++++++++++++
hw/arm/smmu-internal.h | 97 +++
hw/arm/smmuv3-internal.h | 603 +++++++++++++++++++
hw/arm/smmuv3.c | 1134 +++++++++++++++++++++++++++++++++++
hw/arm/trace-events | 44 ++
hw/arm/virt-acpi-build.c | 56 +-
hw/arm/virt.c | 109 +++-
include/hw/acpi/acpi-defs.h | 15 +
include/hw/arm/smmu-common.h | 125 ++++
include/hw/arm/smmuv3.h | 87 +++
include/hw/arm/virt.h | 5 +
13 files changed, 2687 insertions(+), 9 deletions(-)
create mode 100644 hw/arm/smmu-common.c
create mode 100644 hw/arm/smmu-internal.h
create mode 100644 hw/arm/smmuv3-internal.h
create mode 100644 hw/arm/smmuv3.c
create mode 100644 include/hw/arm/smmu-common.h
create mode 100644 include/hw/arm/smmuv3.h
--
2.5.5