KVM: selftests: Add and use helper to set vCPU's CPUID maxphyaddr

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Add a helper to set a vCPU's guest.MAXPHYADDR, and use it in the test
that verifies the emulator returns an error on an unknown instruction
when KVM emulates in response to an EPT violation with a GPA that is
legal in hardware but illegal with respect to the guest's MAXPHYADDR.

Add a helper even though there's only a single user at this time.  Before
its removal, mmu_role_test also stuffed guest.MAXPHYADDR, and the helper
provides a small amount of clarity.

More importantly, this eliminates a set_cpuid() user and an instance of
modifying kvm_get_supported_cpuid()'s static "cpuid".

Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220614200707.3315957-25-seanjc@google.com

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Sean Christopherson 2022-06-14 20:06:49 +00:00

parent 7af7161d87

commit 1940af0b81

3 changed files with 11 additions and 9 deletions

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2

tools/testing/selftests/kvm/include/x86_64/processor.h

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tools/testing/selftests/kvm/lib/x86_64/processor.c

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tools/testing/selftests/kvm/x86_64/emulator_error_test.c

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