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KVM: selftests: Move platform_info_test's main assert into guest code

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As a first step toward gracefully handling the expected #GP on RDMSR in
platform_info_test, move the test's assert on the non-faulting RDMSR
result into the guest itself.  This will allow using a unified flow for
the host userspace side of things.

Link: https://lore.kernel.org/r/20240314232637.2538648-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2024-03-14 16:26:24 -07:00
parent 0d95817e07
commit 53635ec253
1 changed files with 12 additions and 8 deletions
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20
tools/testing/selftests/kvm/x86_64/platform_info_test.c
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@@ -27,7 +27,9 @@ static void guest_code(void)
for (;;) {
msr_platform_info = rdmsr(MSR_PLATFORM_INFO);
GUEST_SYNC(msr_platform_info);
GUEST_ASSERT_EQ(msr_platform_info & MSR_PLATFORM_INFO_MAX_TURBO_RATIO,
MSR_PLATFORM_INFO_MAX_TURBO_RATIO);
GUEST_SYNC(0);
asm volatile ("inc %r11");
}
}
@@ -40,13 +42,15 @@ static void test_msr_platform_info_enabled(struct kvm_vcpu *vcpu)
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
get_ucall(vcpu, &uc);
TEST_ASSERT(uc.cmd == UCALL_SYNC,
"Received ucall other than UCALL_SYNC: %lu", uc.cmd);
TEST_ASSERT((uc.args[1] & MSR_PLATFORM_INFO_MAX_TURBO_RATIO) ==
MSR_PLATFORM_INFO_MAX_TURBO_RATIO,
"Expected MSR_PLATFORM_INFO to have max turbo ratio mask: %i.",
MSR_PLATFORM_INFO_MAX_TURBO_RATIO);
switch (get_ucall(vcpu, &uc)) {
case UCALL_SYNC:
break;
case UCALL_ABORT:
REPORT_GUEST_ASSERT(uc);
default:
TEST_FAIL("Unexpected ucall %lu", uc.cmd);
break;
}
}
static void test_msr_platform_info_disabled(struct kvm_vcpu *vcpu)