linux.git/tools/testing/selftests/kvm/include, branch v6.3-rc2

Merge tag 'kvm-x86-selftests-6.3' of https://github.com/kvm-x86/linux into HEAD

2023-02-15T13:34:32+00:00

KVM selftests changes for 6.3:

 - Cache the CPU vendor (AMD vs. Intel) and use the info to emit the correct
   hypercall instruction instead of relying on KVM to patch in VMMCALL

 - A variety of one-off cleanups and fixes

KVM: selftests: Test Hyper-V extended hypercall enablement

2023-02-01T21:46:24+00:00

Test Hyper-V extended hypercall, HV_EXT_CALL_QUERY_CAPABILITIES
(0x8001), access denied and invalid parameter cases.

Access is denied if CPUID.0x40000003.EBX BIT(20) is not set.
Invalid parameter if call has fast bit set.

Signed-off-by: Vipin Sharma 
Link: https://lore.kernel.org/r/20221212183720.4062037-11-vipinsh@google.com
Signed-off-by: Sean Christopherson

KVM: selftests: x86: Cache host CPU vendor (AMD vs. Intel)

2023-01-24T18:06:32+00:00

Cache the host CPU vendor for userspace and share it with guest code.

All the current callers of this_cpu* actually care about host cpu so
they are updated to check host_cpu_is*.

Suggested-by: Sean Christopherson 
Reviewed-by: David Matlack 
Signed-off-by: Vishal Annapurve 
Link: https://lore.kernel.org/r/20230111004445.416840-3-vannapurve@google.com
Signed-off-by: Sean Christopherson

KVM: selftests: x86: Use "this_cpu" prefix for cpu vendor queries

2023-01-24T18:06:31+00:00

Replace is_intel/amd_cpu helpers with this_cpu_* helpers to better
convey the intent of querying vendor of the current cpu.

Suggested-by: Sean Christopherson 
Reviewed-by: David Matlack 
Signed-off-by: Vishal Annapurve 
Link: https://lore.kernel.org/r/20230111004445.416840-2-vannapurve@google.com
Signed-off-by: Sean Christopherson

KVM: selftests: Fix a typo in the vcpu_msrs_set assert

2023-01-24T18:06:31+00:00

The assert incorrectly identifies the ioctl being called.  Switch it
from KVM_GET_MSRS to KVM_SET_MSRS.

Fixes: 6ebfef83f03f ("KVM: selftest: Add proper helpers for x86-specific save/restore ioctls")
Signed-off-by: Aaron Lewis 
Reviewed-by: Jim Mattson 
Reviewed-by: Sean Christopherson 
Link: https://lore.kernel.org/r/20221209201326.2781950-1-aaronlewis@google.com
Signed-off-by: Sean Christopherson

KVM: selftests: Test Hyper-V invariant TSC control

2022-12-29T20:33:33+00:00

Add a test for the newly introduced Hyper-V invariant TSC control feature:
- HV_X64_MSR_TSC_INVARIANT_CONTROL is not available without
 HV_ACCESS_TSC_INVARIANT CPUID bit set and available with it.
- BIT(0) of HV_X64_MSR_TSC_INVARIANT_CONTROL controls the filtering of
architectural invariant TSC (CPUID.80000007H:EDX[8]) bit.

Signed-off-by: Vitaly Kuznetsov 
Reviewed-by: Sean Christopherson 
Message-Id: <20221013095849.705943-8-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini

KVM: selftests: Convert hyperv_features test to using KVM_X86_CPU_FEATURE()

2022-12-29T20:33:31+00:00

hyperv_features test needs to set certain CPUID bits in Hyper-V feature
leaves but instead of open coding this, common KVM_X86_CPU_FEATURE()
infrastructure can be used.

Signed-off-by: Vitaly Kuznetsov 
Reviewed-by: Sean Christopherson 
Message-Id: <20221013095849.705943-6-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini

Merge remote-tracking branch 'kvm/queue' into HEAD

2022-12-12T20:54:07+00:00

x86 Xen-for-KVM:

* Allow the Xen runstate information to cross a page boundary

* Allow XEN_RUNSTATE_UPDATE flag behaviour to be configured

* add support for 32-bit guests in SCHEDOP_poll

x86 fixes:

* One-off fixes for various emulation flows (SGX, VMXON, NRIPS=0).

* Reinstate IBPB on emulated VM-Exit that was incorrectly dropped a few
   years back when eliminating unnecessary barriers when switching between
   vmcs01 and vmcs02.

* Clean up the MSR filter docs.

* Clean up vmread_error_trampoline() to make it more obvious that params
  must be passed on the stack, even for x86-64.

* Let userspace set all supported bits in MSR_IA32_FEAT_CTL irrespective
  of the current guest CPUID.

* Fudge around a race with TSC refinement that results in KVM incorrectly
  thinking a guest needs TSC scaling when running on a CPU with a
  constant TSC, but no hardware-enumerated TSC frequency.

* Advertise (on AMD) that the SMM_CTL MSR is not supported

* Remove unnecessary exports

Selftests:

* Fix an inverted check in the access tracking perf test, and restore
  support for asserting that there aren't too many idle pages when
  running on bare metal.

* Fix an ordering issue in the AMX test introduced by recent conversions
  to use kvm_cpu_has(), and harden the code to guard against similar bugs
  in the future.  Anything that tiggers caching of KVM's supported CPUID,
  kvm_cpu_has() in this case, effectively hides opt-in XSAVE features if
  the caching occurs before the test opts in via prctl().

* Fix build errors that occur in certain setups (unsure exactly what is
  unique about the problematic setup) due to glibc overriding
  static_assert() to a variant that requires a custom message.

* Introduce actual atomics for clear/set_bit() in selftests

Documentation:

* Remove deleted ioctls from documentation

* Various fixes

KVM: arm64: selftests: Align VA space allocator with TTBR0

2022-12-09T08:13:35+00:00

An interesting feature of the Arm architecture is that the stage-1 MMU
supports two distinct VA regions, controlled by TTBR{0,1}_EL1. As KVM
selftests on arm64 only uses TTBR0_EL1, the VA space is constrained to
[0, 2^(va_bits-1)). This is different from other architectures that
allow for addressing low and high regions of the VA space from a single
page table.

KVM selftests' VA space allocator presumes the valid address range is
split between low and high memory based the MSB, which of course is a
poor match for arm64's TTBR0 region.

Allow architectures to override the default VA space layout. Make use of
the override to align vpages_valid with the behavior of TTBR0 on arm64.

Signed-off-by: Oliver Upton 
Message-Id: <20221207214809.489070-4-oliver.upton@linux.dev>
Signed-off-by: Paolo Bonzini

Merge tag 'kvmarm-6.2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2022-12-09T08:12:12+00:00

KVM/arm64 updates for 6.2

- Enable the per-vcpu dirty-ring tracking mechanism, together with an
  option to keep the good old dirty log around for pages that are
  dirtied by something other than a vcpu.

- Switch to the relaxed parallel fault handling, using RCU to delay
  page table reclaim and giving better performance under load.

- Relax the MTE ABI, allowing a VMM to use the MAP_SHARED mapping
  option, which multi-process VMMs such as crosvm rely on.

- Merge the pKVM shadow vcpu state tracking that allows the hypervisor
  to have its own view of a vcpu, keeping that state private.

- Add support for the PMUv3p5 architecture revision, bringing support
  for 64bit counters on systems that support it, and fix the
  no-quite-compliant CHAIN-ed counter support for the machines that
  actually exist out there.

- Fix a handful of minor issues around 52bit VA/PA support (64kB pages
  only) as a prefix of the oncoming support for 4kB and 16kB pages.

- Add/Enable/Fix a bunch of selftests covering memslots, breakpoints,
  stage-2 faults and access tracking. You name it, we got it, we
  probably broke it.

- Pick a small set of documentation and spelling fixes, because no
  good merge window would be complete without those.

As a side effect, this tag also drags:

- The 'kvmarm-fixes-6.1-3' tag as a dependency to the dirty-ring
  series

- A shared branch with the arm64 tree that repaints all the system
  registers to match the ARM ARM's naming, and resulting in
  interesting conflicts