kernel/linux.git/tools/testing/selftests/kvm/include/x86/processor.h, branch v6.19.12

KVM: selftests: Change VM_MODE_PXXV48_4K to VM_MODE_PXXVYY_4K

2025-11-21T00:19:59+00:00

Use 57-bit addresses with 5-level paging on hardware that supports LA57. Continue to use 48-bit addresses with 4-level paging on hardware that doesn't support LA57. Suggested-by: Sean Christopherson Signed-off-by: Jim Mattson Link: https://patch.msgid.link/20251028225827.2269128-4-jmattson@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Add an MSR test to exercise guest/host and read/write

2025-09-23T16:51:56+00:00

Add a selftest to verify reads and writes to various MSRs, from both the guest and host, and expect success/failure based on whether or not the vCPU supports the MSR according to supported CPUID. Note, this test is extremely similar to KVM-Unit-Test's "msr" test, but provides more coverage with respect to host accesses, and will be extended to provide addition testing of CPUID-based features, save/restore lists, and KVM_{G,S}ET_ONE_REG, all which are extremely difficult to validate in KUT. If kvm.ignore_msrs=true, skip the unsupported and reserved testcases as KVM's ABI is a mess; what exactly is supposed to be ignored, and when, varies wildly. Reviewed-by: Chao Gao Link: https://lore.kernel.org/r/20250919223258.1604852-46-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Add ex_str() to print human friendly name of exception vectors

2025-09-23T15:39:02+00:00

Steal exception_mnemonic() from KVM-Unit-Tests as ex_str() (to keep line lengths reasonable) and use it in assert messages that currently print the raw vector number. Co-developed-by: Chao Gao Signed-off-by: Chao Gao Link: https://lore.kernel.org/r/20250919223258.1604852-45-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Validate more arch-events in pmu_counters_test

2025-09-23T15:38:59+00:00

Add support for 5 new architectural events (4 topdown level 1 metrics events and LBR inserts event) that will first show up in Intel's Clearwater Forest CPUs. Detailed info about the new events can be found in SDM section 21.2.7 "Pre-defined Architectural Performance Events". Signed-off-by: Dapeng Mi Tested-by: Yi Lai [sean: drop "unavailable_mask" changes] Tested-by: Dapeng Mi Link: https://lore.kernel.org/r/20250919214648.1585683-5-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Add support for #DE exception fixup

2025-09-11T15:55:44+00:00

Add support for handling #DE (divide error) exceptions in KVM selftests so that the fastops test can verify KVM correctly handles #DE when emulating DIV or IDIV on behalf of the guest. Morph #DE to 0xff (i.e. to -1) as a mostly-arbitrary vector to indicate #DE, so that '0' (the real #DE vector) can still be used to indicate "no exception". Link: https://lore.kernel.org/r/20250909202835.333554-2-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Move Intel and AMD module param helpers to x86/processor.h

2025-08-19T15:00:29+00:00

Move the x86 specific helpers for getting kvm_{amd,intel} module params to x86 where they belong. Expose the module-agnostic helpers globally, there is nothing secret about the logic. Link: https://lore.kernel.org/r/20250806225159.1687326-1-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Verify KVM is loaded when getting a KVM module param

2025-06-20T20:39:10+00:00

Probe /dev/kvm when getting a KVM module param so that attempting to load a module param super early in a selftest generates a SKIP message about KVM not being loaded/enabled, versus some random parameter not existing. E.g. KVM x86's unconditional retrieval of force_emulation_prefix during kvm_selftest_arch_init() generates a rather confusing error message that takes far too much triage to understand. Link: https://lore.kernel.org/r/20250516215909.2551628-2-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: SEV-SNP test for KVM_SEV_INIT2

2025-05-02T19:32:32+00:00

Add the X86_FEATURE_SEV_SNP CPU feature to the architectural definition for the SEV-SNP VM type to exercise the KVM_SEV_INIT2 call. Ensure that the SNP test is skipped in scenarios where CPUID supports it but KVM does not, preventing reporting of failure in such cases. Reviewed-by: Nikunj A Dadhania Signed-off-by: Pratik R. Sampat Link: https://lore.kernel.org/r/20250305230000.231025-3-prsampat@amd.com [sean: use the same pattern as SEV and SEV-ES] Signed-off-by: Sean Christopherson

Merge tag 'kvm-x86-selftests-6.15' of https://github.com/kvm-x86/linux into HEAD

2025-03-19T13:05:34+00:00

KVM selftests changes for 6.15, part 2 - Fix a variety of flaws, bugs, and false failures/passes dirty_log_test, and improve its coverage by collecting all dirty entries on each iteration. - Fix a few minor bugs related to handling of stats FDs. - Add infrastructure to make vCPU and VM stats FDs available to tests by default (open the FDs during VM/vCPU creation). - Relax an assertion on the number of HLT exits in the xAPIC IPI test when running on a CPU that supports AMD's Idle HLT (which elides interception of HLT if a virtual IRQ is pending and unmasked). - Misc cleanups and fixes.

Merge tag 'kvm-x86-selftests_6.15-1' of https://github.com/kvm-x86/linux into HEAD

2025-03-19T13:05:22+00:00

KVM selftests changes for 6.15, part 1 - Misc cleanups and prep work. - Annotate _no_printf() with "printf" so that pr_debug() statements are checked by the compiler for default builds (and pr_info() when QUIET). - Attempt to whack the last LLC references/misses mole in the Intel PMU counters test by adding a data load and doing CLFLUSH{OPT} on the data instead of the code being executed. The theory is that modern Intel CPUs have learned new code prefetching tricks that bypass the PMU counters. - Fix a flaw in the Intel PMU counters test where it asserts that an event is counting correctly without actually knowing what the event counts on the underlying hardware.