linux.git/tools/testing/selftests/kvm, branch v5.14

KVM: selftests: fix hyperv_clock test

2021-08-04T13:43:03+00:00

The test was mistakenly using addr_gpa2hva on a gva and that happened
to work accidentally.  Commit 106a2e766eae ("KVM: selftests: Lower the
min virtual address for misc page allocations") revealed this bug.

Fixes: 2c7f76b4c42b ("selftests: kvm: Add basic Hyper-V clocksources tests", 2021-03-18)
Signed-off-by: Maxim Levitsky 
Message-Id: <20210804112057.409498-1-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Test access to XMM fast hypercalls

2021-08-03T10:16:40+00:00

Check that #UD is raised if bit 16 is clear in
HYPERV_CPUID_FEATURES.EDX and an 'XMM fast' hypercall is issued.

Signed-off-by: Vitaly Kuznetsov 
Reviewed-by: Siddharth Chandrasekaran 
Signed-off-by: Paolo Bonzini 
Message-Id: <20210730122625.112848-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Introduce access_tracking_perf_test

2021-07-27T20:59:00+00:00

This test measures the performance effects of KVM's access tracking.
Access tracking is driven by the MMU notifiers test_young, clear_young,
and clear_flush_young. These notifiers do not have a direct userspace
API, however the clear_young notifier can be triggered by marking a
pages as idle in /sys/kernel/mm/page_idle/bitmap. This test leverages
that mechanism to enable access tracking on guest memory.

To measure performance this test runs a VM with a configurable number of
vCPUs that each touch every page in disjoint regions of memory.
Performance is measured in the time it takes all vCPUs to finish
touching their predefined region.

Example invocation:

  $ ./access_tracking_perf_test -v 8
  Testing guest mode: PA-bits:ANY, VA-bits:48,  4K pages
  guest physical test memory offset: 0xffdfffff000

  Populating memory             : 1.337752570s
  Writing to populated memory   : 0.010177640s
  Reading from populated memory : 0.009548239s
  Mark memory idle              : 23.973131748s
  Writing to idle memory        : 0.063584496s
  Mark memory idle              : 24.924652964s
  Reading from idle memory      : 0.062042814s

Breaking down the results:

 * "Populating memory": The time it takes for all vCPUs to perform the
   first write to every page in their region.

 * "Writing to populated memory" / "Reading from populated memory": The
   time it takes for all vCPUs to write and read to every page in their
   region after it has been populated. This serves as a control for the
   later results.

 * "Mark memory idle": The time it takes for every vCPU to mark every
   page in their region as idle through page_idle.

 * "Writing to idle memory" / "Reading from idle memory": The time it
   takes for all vCPUs to write and read to every page in their region
   after it has been marked idle.

This test should be portable across architectures but it is only enabled
for x86_64 since that's all I have tested.

Reviewed-by: Ben Gardon 
Signed-off-by: David Matlack 
Message-Id: <20210713220957.3493520-7-dmatlack@google.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Fix missing break in dirty_log_perf_test arg parsing

2021-07-27T20:58:59+00:00

There is a missing break statement which causes a fallthrough to the
next statement where optarg will be null and a segmentation fault will
be generated.

Fixes: 9e965bb75aae ("KVM: selftests: Add backing src parameter to dirty_log_perf_test")
Reviewed-by: Ben Gardon 
Signed-off-by: David Matlack 
Message-Id: <20210713220957.3493520-6-dmatlack@google.com>
Signed-off-by: Paolo Bonzini

Merge tag 'kvmarm-fixes-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2021-07-19T14:05:40+00:00

KVM/arm64 fixes for 5.14, take #1

- Fix MTE shared page detection

- Fix selftest use of obsolete pthread_yield() in favour of sched_yield()

- Enable selftest's use of PMU registers when asked to

KVM: selftests: smm_test: Test SMM enter from L2

2021-07-15T14:19:44+00:00

Two additional tests are added:
- SMM triggered from L2 does not currupt L1 host state.
- Save/restore during SMM triggered from L2 does not corrupt guest/host
  state.

Signed-off-by: Vitaly Kuznetsov 
Message-Id: <20210628104425.391276-7-vkuznets@redhat.com>
Reviewed-by: Maxim Levitsky 
Signed-off-by: Paolo Bonzini

KVM: selftests: Address extra memslot parameters in vm_vaddr_alloc

2021-07-15T14:19:41+00:00

Commit a75a895e6457 ("KVM: selftests: Unconditionally use memslot 0 for
vaddr allocations") removed the memslot parameters from vm_vaddr_alloc.
It addressed all callers except one under lib/aarch64/, due to a race
with commit e3db7579ef35 ("KVM: selftests: Add exception handling
support for aarch64")

Fix the vm_vaddr_alloc call in lib/aarch64/processor.c.

Reported-by: Zenghui Yu 
Signed-off-by: Ricardo Koller 
Message-Id: <20210702201042.4036162-1-ricarkol@google.com>
Reviewed-by: Eric Auger 
Signed-off-by: Paolo Bonzini

KVM: selftests: x86: Address missing vm_install_exception_handler conversions

2021-07-14T16:15:05+00:00

Commit b78f4a59669 ("KVM: selftests: Rename vm_handle_exception")
raced with a couple of new x86 tests, missing two vm_handle_exception
to vm_install_exception_handler conversions.

Help the two broken tests to catch up with the new world.

Cc: Andrew Jones 
CC: Ricardo Koller 
Cc: Paolo Bonzini 
Signed-off-by: Marc Zyngier 
Message-Id: <20210701071928.2971053-1-maz@kernel.org>
Reviewed-by: Andrew Jones 
Reviewed-by: Ricardo Koller 
Signed-off-by: Paolo Bonzini

Merge tag 'kvm-s390-master-5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

2021-07-14T16:14:27+00:00

KVM: selftests: Fixes

- provide memory model for  IBM z196 and zEC12
- do not require 64GB of memory

KVM: arm64: selftests: get-reg-list: actually enable pmu regs in pmu sublist

2021-07-14T10:55:18+00:00

We reworked get-reg-list to make it easier to enable optional register
sublists by parametrizing their vcpu feature flags as well as making
other generalizations. That was all to make sure we enable the PMU
registers when we want to test them. Somehow we forgot to actually
include the PMU feature flag in the PMU sublist description though!
Do that now.

Fixes: 313673bad871 ("KVM: arm64: selftests: get-reg-list: Split base and pmu registers")
Signed-off-by: Andrew Jones 
Signed-off-by: Marc Zyngier 
Link: https://lore.kernel.org/r/20210713203742.29680-3-drjones@redhat.com