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KVM: selftests: Drop now-redundant checks on PERF_CAPABILITIES writes 

Now that vcpu_set_msr() verifies the expected "read what was wrote"
semantics of all durable MSRs, including PERF_CAPABILITIES, drop the
now-redundant manual checks in the VMX PMU caps test.

Link: https://lore.kernel.org/r/20230311004618.920745-14-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2023-03-10 16:46:10 -08:00
parent f138258565
commit 69713940d2
1 changed files with 0 additions and 6 deletions
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6
tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c
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@ -51,10 +51,7 @@ static void test_basic_perf_capabilities(union perf_capabilities host_cap)
struct kvm_vm *vm = vm_create_with_one_vcpu(&vcpu, NULL);
vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, 0);
ASSERT_EQ(vcpu_get_msr(vcpu, MSR_IA32_PERF_CAPABILITIES), 0);
vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, host_cap.capabilities);
ASSERT_EQ(vcpu_get_msr(vcpu, MSR_IA32_PERF_CAPABILITIES), host_cap.capabilities);
kvm_vm_free(vm);
}
@ -67,9 +64,6 @@ static void test_fungible_perf_capabilities(union perf_capabilities host_cap)
/* testcase 1, set capabilities when we have PDCM bit */
vcpu_set_msr(vcpu, MSR_IA32_PERF_CAPABILITIES, PMU_CAP_FW_WRITES);
/* check capabilities can be retrieved with KVM_GET_MSR */
ASSERT_EQ(vcpu_get_msr(vcpu, MSR_IA32_PERF_CAPABILITIES), PMU_CAP_FW_WRITES);
/* check whatever we write with KVM_SET_MSR is _not_ modified */
vcpu_run(vcpu);
ASSERT_EQ(vcpu_get_msr(vcpu, MSR_IA32_PERF_CAPABILITIES), PMU_CAP_FW_WRITES);