[PATCH v2 0/4] KVM: selftests: Add LoongArch support

Tianrui Zhao
2023-08-07T06:51:53Z

This patch series base on the Linux LoongArch KVM patch:
Based-on: <20230803022138.2736430-1-zhaotianrui@loongson.cn>

We add LoongArch support into KVM selftests and there are some KVM
test cases we have passed:
kvm_create_max_vcpus
demand_paging_test
kvm_page_table_test
set_memory_region_test
memslot_modification_stress_test
memslot_perf_test
kvm_binary_stats_test

The test results:
1..7
selftests: kvm: kvm_create_max_vcpus
KVM_CAP_MAX_VCPU_ID: 256
KVM_CAP_MAX_VCPUS: 256
Testing creating 256 vCPUs, with IDs 0...255.
ok 1 selftests: kvm: kvm_create_max_vcpus

selftests: kvm: demand_paging_test
Testing guest mode: PA-bits:36, VA-bits:47, 16K pages
guest physical test memory: [0xfbfffc000, 0xfffffc000)
Finished creating vCPUs and starting uffd threads
Started all vCPUs
All vCPU threads joined
Total guest execution time: 0.787727423s
Overall demand paging rate: 83196.291111 pgs/sec
ok 2 selftests: kvm: demand_paging_test

selftests: kvm: kvm_page_table_test
Testing guest mode: PA-bits:36, VA-bits:47, 16K pages
Testing memory backing src type: anonymous
Testing memory backing src granularity: 0x4000
Testing memory size(aligned): 0x40000000
Guest physical test memory offset: 0xfbfffc000
Host virtual test memory offset: 0xffb011c000
Number of testing vCPUs: 1
Started all vCPUs successfully
KVM_CREATE_MAPPINGS: total execution time: -3.-672213074s
KVM_UPDATE_MAPPINGS: total execution time: -4.-381650744s
KVM_ADJUST_MAPPINGS: total execution time: -4.-434860241s
ok 3 selftests: kvm: kvm_page_table_test

selftests: kvm: set_memory_region_test
Allowed number of memory slots: 256
Adding slots 0..255, each memory region with 2048K size
ok 4 selftests: kvm: set_memory_region_test

selftests: kvm: memslot_modification_stress_test
Testing guest mode: PA-bits:36, VA-bits:47, 16K pages
guest physical test memory: [0xfbfffc000, 0xfffffc000)
Finished creating vCPUs
Started all vCPUs
All vCPU threads joined
ok 5 selftests: kvm: memslot_modification_stress_test

selftests: kvm: memslot_perf_test
Testing map performance with 1 runs, 5 seconds each
Test took 0.003797735s for slot setup + 5.012294023s all iterations
Done 369 iterations, avg 0.013583452s each
Best runtime result was 0.013583452s per iteration (with 369 iterations)

Testing unmap performance with 1 runs, 5 seconds each
Test took 0.003841196s for slot setup + 5.001802893s all iterations
Done 341 iterations, avg 0.014668043s each
Best runtime result was 0.014668043s per iteration (with 341 iterations)

Testing unmap chunked performance with 1 runs, 5 seconds each
Test took 0.003784356s for slot setup + 5.000265398s all iterations
Done 7376 iterations, avg 0.000677910s each
Best runtime result was 0.000677910s per iteration (with 7376 iterations)

Testing move active area performance with 1 runs, 5 seconds each
Test took 0.003828075s for slot setup + 5.000021760s all iterations
Done 85449 iterations, avg 0.000058514s each
Best runtime result was 0.000058514s per iteration (with 85449 iterations)

Testing move inactive area performance with 1 runs, 5 seconds each
Test took 0.003809146s for slot setup + 5.000024149s all iterations
Done 181908 iterations, avg 0.000027486s each
Best runtime result was 0.000027486s per iteration (with 181908 iterations)

Testing RW performance with 1 runs, 5 seconds each
Test took 0.003780596s for slot setup + 5.001116175s all iterations
Done 391 iterations, avg 0.012790578s each
Best runtime result was 0.012790578s per iteration (with 391 iterations)
Best slot setup time for the whole test area was 0.003780596s
ok 6 selftests: kvm: memslot_perf_test

selftests: kvm: kvm_binary_stats_test
TAP version 13
1..4
ok 1 vm0
ok 2 vm1
ok 3 vm2
ok 4 vm3
Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0
ok 7 selftests: kvm: kvm_binary_stats_test

Changes for v2:
1. We should use ".balign 4096" to align the assemble code with 4K in
exception.S instead of "align 12".
2. LoongArch only supports 3 or 4 levels page tables, so we remove the
hanlders for 2-levels page table.
3. Remove the DEFAULT_LOONGARCH_GUEST_STACK_VADDR_MIN and use the common
DEFAULT_GUEST_STACK_VADDR_MIN to allocate stack memory in guest.
4. Reorganize the test cases supported by LoongArch.
5. Fix some code comments.
6. Add kvm_binary_stats_test test case into LoongArch KVM selftests.

changes for v1:
1. Add kvm selftests header files for LoongArch.
2. Add processor tests for LoongArch KVM.
3. Add ucall tests for LoongArch KVM.
4. Add LoongArch tests into makefile.

Tianrui Zhao (4):
KVM: selftests: Add KVM selftests header files for LoongArch
KVM: selftests: Add core KVM selftests support for LoongArch
KVM: selftests: Add ucall test support for LoongArch
KVM: selftests: Add test cases supported by LoongArch into makefile

tools/testing/selftests/kvm/Makefile | 12 +
.../selftests/kvm/include/kvm_util_base.h | 5 +
.../kvm/include/loongarch/processor.h | 107 ++++++
.../selftests/kvm/lib/loongarch/exception.S | 27 ++
.../selftests/kvm/lib/loongarch/processor.c | 356 ++++++++++++++++++
.../selftests/kvm/lib/loongarch/ucall.c | 43 +++
6 files changed, 550 insertions(+)
create mode 100644 tools/testing/selftests/kvm/include/loongarch/processor.h
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/exception.S
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/processor.c
create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c

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2.39.1