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KVM: selftests: Rework platform_info_test to actually verify #GP
Rework platform_info_test to actually handle and verify the expected #GP on RDMSR when the associated KVM capability is disabled. Currently, the test _deliberately_ doesn't handle the #GP, and instead lets it escalated to a triple fault shutdown. In addition to verifying that KVM generates the correct fault, handling the #GP will be necessary (without even more shenanigans) when a future change to the core KVM selftests library configures the IDT and exception handlers by default (the test subtly relies on the IDT limit being '0'). Link: https://lore.kernel.org/r/20240314232637.2538648-7-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
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