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selftests: KVM: Use KVM_SET_MP_STATE to power off vCPU in psci_test

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Setting a vCPU's MP state to KVM_MP_STATE_STOPPED has the effect of
powering off the vCPU. Rather than using the vCPU init feature flag, use
the KVM_SET_MP_STATE ioctl to power off the target vCPU.

Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220504032446.4133305-11-oupton@google.com
This commit is contained in:
Oliver Upton 2022-05-04 03:24:44 +00:00 committed by Marc Zyngier
parent 694e3dcc47
commit d135399a97
1 changed files with 11 additions and 2 deletions
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13
tools/testing/selftests/kvm/aarch64/psci_test.c
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@ -60,6 +60,15 @@ static void guest_main(uint64_t target_cpu)
GUEST_DONE();
}
static void vcpu_power_off(struct kvm_vm *vm, uint32_t vcpuid)
{
struct kvm_mp_state mp_state = {
.mp_state = KVM_MP_STATE_STOPPED,
};
vcpu_set_mp_state(vm, vcpuid, &mp_state);
}
int main(void)
{
uint64_t target_mpidr, obs_pc, obs_x0;
@ -75,12 +84,12 @@ int main(void)
init.features[0] |= (1 << KVM_ARM_VCPU_PSCI_0_2);
aarch64_vcpu_add_default(vm, VCPU_ID_SOURCE, &init, guest_main);
aarch64_vcpu_add_default(vm, VCPU_ID_TARGET, &init, guest_main);
/*
* make sure the target is already off when executing the test.
*/
init.features[0] |= (1 << KVM_ARM_VCPU_POWER_OFF);
aarch64_vcpu_add_default(vm, VCPU_ID_TARGET, &init, guest_main);
vcpu_power_off(vm, VCPU_ID_TARGET);
get_reg(vm, VCPU_ID_TARGET, KVM_ARM64_SYS_REG(SYS_MPIDR_EL1), &target_mpidr);
vcpu_args_set(vm, VCPU_ID_SOURCE, 1, target_mpidr & MPIDR_HWID_BITMASK);