Commit 80c2b6d8 authored by Sean Christopherson's avatar Sean Christopherson
Browse files

KVM: selftests: Add KVM_{G,S}ET_ONE_REG coverage to MSRs test 



When KVM_{G,S}ET_ONE_REG are supported, verify that MSRs can be accessed
via ONE_REG and through the dedicated MSR ioctls.  For simplicity, run
the test twice, e.g. instead of trying to get MSR values into the exact
right state when switching write methods.

Reviewed-by: default avatarChao Gao <chao.gao@intel.com>
Link: https://lore.kernel.org/r/20250919223258.1604852-49-seanjc@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent a8b9cca9

tools/testing/selftests/kvm/x86/msrs_test.c

+21 −1
Original line number Diff line number Diff line
@@ -200,6 +200,9 @@ static void guest_main(void) 
	}

}



static bool has_one_reg;

static bool use_one_reg;



static void host_test_msr(struct kvm_vcpu *vcpu, u64 guest_val)

{

	u64 reset_val = msrs[idx].reset_val;
@@ -213,11 +216,21 @@ static void host_test_msr(struct kvm_vcpu *vcpu, u64 guest_val) 
	TEST_ASSERT(val == guest_val, "Wanted 0x%lx from get_msr(0x%x), got 0x%lx",

		    guest_val, msr, val);



	if (use_one_reg)

		vcpu_set_reg(vcpu, KVM_X86_REG_MSR(msr), reset_val);

	else

		vcpu_set_msr(vcpu, msr, reset_val);



	val = vcpu_get_msr(vcpu, msr);

	TEST_ASSERT(val == reset_val, "Wanted 0x%lx from get_msr(0x%x), got 0x%lx",

		    reset_val, msr, val);



	if (!has_one_reg)

		return;



	val = vcpu_get_reg(vcpu, KVM_X86_REG_MSR(msr));

	TEST_ASSERT(val == reset_val, "Wanted 0x%lx from get_reg(0x%x), got 0x%lx",

		    reset_val, msr, val);

}



static void do_vcpu_run(struct kvm_vcpu *vcpu)
@@ -357,5 +370,12 @@ static void test_msrs(void) 


int main(void)

{

	has_one_reg = kvm_has_cap(KVM_CAP_ONE_REG);



	test_msrs();



	if (has_one_reg) {

		use_one_reg = true;

		test_msrs();

	}

}