2016-10-14 20:40+0800, Peter Xu:
> This series is adding simplest test cases for VT-d.
>
> The series contains some conflict with Alex's PCI framework
> enhancement, so I am marking it as RFC, I can rebase to Alex's work
> after it's merged. Besides the conflict, the codes is workable, and
> passed smoke test.
>
> Currently only a very small test scope is covered:
>
> * VT-d init
> * DMAR: 4 bytes copy
> * IR: MSI
>
> However this series could be a base point to add more test cases for
> VT-d.
The size already scared away reviewers, so slowly extending it is a good
idea. :)
> The problem is, there are many IOMMU error conditions which are
> very hard to be triggered in a real guest (IOMMU has merely no
> interface for guest user, and it's totally running in the background).
I gracefully skipped most of VT-d error handling ... how many of those
errors are not a result of a misconfiguration?
> This piece of work can be a start point if we want to do more
> complicated things and play around with Intel IOMMU devices (also for
> IOMMU regression tests).
>
> Please review. Thanks,
>
> =================
>
> To run the test:
>
> ./x86/run ./x86/intel-iommu.flat \
> -M q35,kernel-irqchip=split -global ioapic.version=0x20 \
> -device intel-iommu,intremap=on -device edu
This command line deserved an entry in x86/unittests.cfg, it will run
the test automatically with ./run_tests.sh and serve as a refererence
for manual execution.
Thanks.
>
> Sample output:
>
> pxdev:kvm-unit-tests [new-iommu-ut]# ./iommu_run.sh
> /root/git/qemu/bin/x86_64-softmmu/qemu-system-x86_64 -enable-kvm -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -kernel ./x86/intel-iommu.flat -M q35,kernel-irqchip=split -global ioapic.version=0x20 -device intel-iommu,intremap=on -device edu
> enabling apic
> paging enabled
> cr0 = 80010011
> cr3 = 7fff000
> cr4 = 20
> VT-d version: 0x10
> cap: 0x0012008c22260206
> ecap: 0x0000000000f00f1a
> PASS: init status check
> PASS: fault status check
> PASS: QI enablement
> DMAR table address: 0x0000000007ff9000
> PASS: DMAR table setup
> IR table address: 0x0000000007ff8000
> PASS: IR table setup
> PASS: DMAR enablement
> PASS: IR enablement
> PASS: DMAR support 39 bits address width
> PASS: DMAR support huge pages
> PCI: init dev 0x0020 BAR 0 [MEM] addr 0xfea00000
> PCI detected cap 0x5
> Detected MSI for device 0x20 offset 0x40
> allocated vt-d root entry for PCI bus 0
> allocated vt-d context entry for devfn 0x20
> map 4K page IOVA 0x0 to 0x7ff7000 (sid=0x0020)
> edu device DMA start TO addr 0x0 size 0x4 off 0x0
> edu device DMA start FROM addr 0x4 size 0x4 off 0x0
> PASS: DMAR 4B memcpy test
> INTR: setup IRTE index 0
> MSI: dev 0x20 init 64bit address: addr=0xfee00010, data=0x0
> PASS: EDU factorial INTR test
>
> SUMMARY: 11 tests
>
> =================
>
> Peter Xu (14):
> x86: vm: allow multiple init for vm setup
> x86: smp: allow multiple init for smp setup
> x86: intel-iommu: add vt-d init test
> pci: refactor init process to pci_dev_init()
> page: add page alignment checker
> util: move MAX/MIN macro into util.h
> vm/page: provide PGDIR_OFFSET() macro
> x86: pci: add pci_config_{read|write}[bw]() helpers
> pci: provide pci_set_master()
> pci: add bdf helpers
> pci: edu: introduce pci-edu helpers
> x86: intel-iommu: add dmar test
> pci: add msi support for 32/64bit address
> x86: intel-iommu: add IR test
>
> lib/alloc.c | 3 -
> lib/asm-generic/page.h | 5 +
> lib/pci-edu.c | 140 +++++++++++++++++++
> lib/pci-edu.h | 36 +++++
> lib/pci.c | 143 +++++++++++++++----
> lib/pci.h | 37 ++++-
> lib/util.h | 3 +
> lib/x86/asm/page.h | 3 +
> lib/x86/asm/pci.h | 37 ++++-
> lib/x86/intel-iommu.c | 363 +++++++++++++++++++++++++++++++++++++++++++++++++
> lib/x86/intel-iommu.h | 130 ++++++++++++++++++
> lib/x86/smp.c | 6 +
> lib/x86/vm.c | 11 +-
> x86/Makefile.common | 1 +
> x86/Makefile.x86_64 | 2 +
> x86/intel-iommu.c | 138 +++++++++++++++++++
> x86/vmexit.c | 22 +--
> 17 files changed, 1026 insertions(+), 54 deletions(-)
> create mode 100644 lib/pci-edu.c
> create mode 100644 lib/pci-edu.h
> create mode 100644 lib/x86/intel-iommu.c
> create mode 100644 lib/x86/intel-iommu.h
> create mode 100644 x86/intel-iommu.c
>
> --
> 2.7.4
>
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