KVM: selftests: Verify KVM preserves userspace writes to "durable" MSRs
Assert that KVM provides "read what you wrote" semantics for all "durable" MSRs (for lack of a better name). The extra coverage is cheap from a runtime performance perspective, and verifying the behavior in the common helper avoids gratuitous copy+paste in individual tests. Note, this affects all tests that set MSRs from userspace! Link: https://lore.kernel.org/r/20230311004618.920745-13-seanjc@google.com Signed-off-by:Sean Christopherson <seanjc@google.com>
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