KVM: selftests: Extend PMU counters test to validate RDPMC after WRMSR
Extend the read/write PMU counters subtest to verify that RDPMC also reads back the written value. Opportunsitically verify that attempting to use the "fast" mode of RDPMC fails, as the "fast" flag is only supported by non-architectural PMUs, which KVM doesn't virtualize. Tested-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Link: https://lore.kernel.org/r/20240109230250.424295-30-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
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