linux.git/tools/testing/selftests/kvm/Makefile, branch v5.12

selftests: kvm: add set_boot_cpu_id test

2021-03-18T17:55:14+00:00

Test for the KVM_SET_BOOT_CPU_ID ioctl.
Check that it correctly allows to change the BSP vcpu.

Signed-off-by: Emanuele Giuseppe Esposito 
Message-Id: <20210318151624.490861-2-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini

selftests: kvm: add get_msr_index_features

2021-03-18T17:30:49+00:00

Test the KVM_GET_MSR_FEATURE_INDEX_LIST
and KVM_GET_MSR_INDEX_LIST ioctls.

Signed-off-by: Emanuele Giuseppe Esposito 
Message-Id: <20210318145629.486450-1-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini

selftests: kvm: Add basic Hyper-V clocksources tests

2021-03-18T15:38:58+00:00

Introduce a new selftest for Hyper-V clocksources (MSR-based reference TSC
and TSC page). As a starting point, test the following:
1) Reference TSC is 1Ghz clock.
2) Reference TSC and TSC page give the same reading.
3) TSC page gets updated upon KVM_SET_CLOCK call.
4) TSC page does not get updated when guest opted for reenlightenment.
5) Disabled TSC page doesn't get updated.

Signed-off-by: Vitaly Kuznetsov 
Message-Id: <20210318140949.1065740-1-vkuznets@redhat.com>
[Add a host-side test using TSC + KVM_GET_MSR too. - Paolo]
Signed-off-by: Paolo Bonzini

selftests: kvm: add hardware_disable test

2021-02-15T16:42:36+00:00

This test launches 512 VMs in serial and kills them after a random
amount of time.

The test was original written to exercise KVM user notifiers in
the context of1650b4ebc99d:
- KVM: Disable irq while unregistering user notifier
- https://lore.kernel.org/kvm/CACXrx53vkO=HKfwWwk+fVpvxcNjPrYmtDZ10qWxFvVX_PTGp3g@mail.gmail.com/

Recently, this test piqued my interest because it proved useful to
for AMD SNP in exercising the "in-use" pages, described in APM section
15.36.12, "Running SNP-Active Virtual Machines".

Signed-off-by: Ignacio Alvarado 
Signed-off-by: Marc Orr 
Message-Id: <20210213001452.1719001-1-marcorr@google.com>
Signed-off-by: Paolo Bonzini

KVM: x86: declare Xen HVM shared info capability and add test case

2021-02-04T14:19:39+00:00

Instead of adding a plethora of new KVM_CAP_XEN_FOO capabilities, just
add bits to the return value of KVM_CAP_XEN_HVM.

Signed-off-by: David Woodhouse

KVM: x86/xen: intercept xen hypercalls if enabled

2021-02-04T14:18:45+00:00

Add a new exit reason for emulator to handle Xen hypercalls.

Since this means KVM owns the ABI, dispense with the facility for the
VMM to provide its own copy of the hypercall pages; just fill them in
directly using VMCALL/VMMCALL as we do for the Hyper-V hypercall page.

This behaviour is enabled by a new INTERCEPT_HCALL flag in the
KVM_XEN_HVM_CONFIG ioctl structure, and advertised by the same flag
being returned from the KVM_CAP_XEN_HVM check.

Rename xen_hvm_config() to kvm_xen_write_hypercall_page() and move it
to the nascent xen.c while we're at it, and add a test case.

Signed-off-by: Joao Martins 
Signed-off-by: David Woodhouse

selftest: kvm: x86: test KVM_GET_CPUID2 and guest visible CPUIDs against KVM_GET_SUPPORTED_CPUID

2021-02-04T10:27:36+00:00

Commit 181f494888d5 ("KVM: x86: fix CPUID entries returned by
KVM_GET_CPUID2 ioctl") revealed that we're not testing KVM_GET_CPUID2
ioctl at all. Add a test for it and also check that from inside the guest
visible CPUIDs are equal to it's output.

Signed-off-by: Vitaly Kuznetsov 
Message-Id: <20210129161821.74635-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini

selftests: kvm/x86: add test for pmu msr MSR_IA32_PERF_CAPABILITIES

2021-02-04T10:27:27+00:00

This test will check the effect of various CPUID settings on the
MSR_IA32_PERF_CAPABILITIES MSR, check that whatever user space writes
with KVM_SET_MSR is _not_ modified from the guest and can be retrieved
with KVM_GET_MSR, and check that invalid LBR formats are rejected.

Signed-off-by: Like Xu 
Message-Id: <20210201051039.255478-12-like.xu@linux.intel.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Add memslot modification stress test

2021-02-04T10:27:19+00:00

Add a memslot modification stress test in which a memslot is repeatedly
created and removed while vCPUs access memory in another memslot. Most
userspaces do not create or remove memslots on running VMs which makes
it hard to test races in adding and removing memslots without a
dedicated test. Adding and removing a memslot also has the effect of
tearing down the entire paging structure, which leads to more page
faults and pressure on the page fault handling path than a one-and-done
memory population test.

Reviewed-by: Jacob Xu 

Signed-off-by: Ben Gardon 
Message-Id: <20210112214253.463999-7-bgardon@google.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Test IPI to halted vCPU in xAPIC while backing page moves

2021-02-04T10:27:17+00:00

When a guest is using xAPIC KVM allocates a backing page for the required
EPT entry for the APIC access address set in the VMCS. If mm decides to
move that page the KVM mmu notifier will update the VMCS with the new
HPA. This test induces a page move to test that APIC access continues to
work correctly. It is a directed test for
commit e649b3f0188f "KVM: x86: Fix APIC page invalidation race".

Tested: ran for 1 hour on a skylake, migrating backing page every 1ms

Depends on patch "selftests: kvm: Add exception handling to selftests"
from aaronlewis@google.com that has not yet been queued.

Signed-off-by: Peter Shier 
Reviewed-by: Jim Mattson 
Reviewed-by: Ricardo Koller 
Message-Id: <20201105223823.850068-1-pshier@google.com>
Signed-off-by: Paolo Bonzini