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

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

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: selftests: introduce P44V64 for z196 and EC12

2021-07-06T08:05:16+00:00

Older machines like z196 and zEC12 do only support 44 bits of physical
addresses. Make this the default and check via IBC if we are on a later
machine. We then add P47V64 as an additional model.

Reviewed-by: David Hildenbrand 
Reviewed-by: Thomas Huth 
Reviewed-by: Cornelia Huck 
Signed-off-by: Christian Borntraeger 
Link: https://lore.kernel.org/kvm/20210701153853.33063-1-borntraeger@de.ibm.com/
Fixes: 1bc603af73dd ("KVM: selftests: introduce P47V64 for s390x")

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

2021-06-25T15:24:24+00:00

KVM/arm64 updates for v5.14.

- Add MTE support in guests, complete with tag save/restore interface
- Reduce the impact of CMOs by moving them in the page-table code
- Allow device block mappings at stage-2
- Reduce the footprint of the vmemmap in protected mode
- Support the vGIC on dumb systems such as the Apple M1
- Add selftest infrastructure to support multiple configuration
  and apply that to PMU/non-PMU setups
- Add selftests for the debug architecture
- The usual crop of PMU fixes

selftests: kvm: Allows userspace to handle emulation errors.

2021-06-24T22:00:48+00:00

This test exercises the feature KVM_CAP_EXIT_ON_EMULATION_FAILURE.  When
enabled, errors in the in-kernel instruction emulator are forwarded to
userspace with the instruction bytes stored in the exit struct for
KVM_EXIT_INTERNAL_ERROR.  So, when the guest attempts to emulate an
'flds' instruction, which isn't able to be emulated in KVM, instead
of failing, KVM sends the instruction to userspace to handle.

For this test to work properly the module parameter
'allow_smaller_maxphyaddr' has to be set.

Signed-off-by: Aaron Lewis 
Reviewed-by: Jim Mattson 
Message-Id: <20210510144834.658457-3-aaronlewis@google.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Add selftest for KVM statistics data binary interface

2021-06-24T22:00:26+00:00

Add selftest to check KVM stats descriptors validity.

Reviewed-by: David Matlack 
Reviewed-by: Ricardo Koller 
Reviewed-by: Krish Sadhukhan 
Tested-by: Fuad Tabba  #arm64
Signed-off-by: Jing Zhang 
Message-Id: <20210618222709.1858088-7-jingzhangos@google.com>
Signed-off-by: Paolo Bonzini

KVM: sefltests: Add x86-64 test to verify MMU reacts to CPUID updates

2021-06-24T15:47:56+00:00

Add an x86-only test to verify that x86's MMU reacts to CPUID updates
that impact the MMU.  KVM has had multiple bugs where it fails to
reconfigure the MMU after the guest's vCPU model changes.

Sadly, this test is effectively limited to shadow paging because the
hardware page walk handler doesn't support software disabling of GBPAGES
support, and KVM doesn't manually walk the GVA->GPA on faults for
performance reasons (doing so would large defeat the benefits of TDP).

Don't require !TDP for the tests as there is still value in running the
tests with TDP, even though the tests will fail (barring KVM hacks).
E.g. KVM should not completely explode if MAXPHYADDR results in KVM using
4-level vs. 5-level paging for the guest.

Signed-off-by: Sean Christopherson 
Message-Id: <20210622200529.3650424-20-seanjc@google.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Add hugepage support for x86-64

2021-06-24T15:47:55+00:00

Add x86-64 hugepage support in the form of a x86-only variant of
virt_pg_map() that takes an explicit page size.  To keep things simple,
follow the existing logic for 4k pages and disallow creating a hugepage
if the upper-level entry is present, even if the desired pfn matches.

Opportunistically fix a double "beyond beyond" reported by checkpatch.

Signed-off-by: Sean Christopherson 
Message-Id: <20210622200529.3650424-19-seanjc@google.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Add wrapper to allocate page table page

2021-06-24T15:47:49+00:00

Add a helper to allocate a page for use in constructing the guest's page
tables.  All architectures have identical address and memslot
requirements (which appear to be arbitrary anyways).

No functional change intended.

Signed-off-by: Sean Christopherson 
Message-Id: <20210622200529.3650424-15-seanjc@google.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Unconditionally allocate EPT tables in memslot 0

2021-06-24T15:47:48+00:00

Drop the EPTP memslot param from all EPT helpers and shove the hardcoded
'0' down to the vm_phy_page_alloc() calls.

No functional change intended.

Signed-off-by: Sean Christopherson 
Message-Id: <20210622200529.3650424-14-seanjc@google.com>
Signed-off-by: Paolo Bonzini