Hi Drew,
On Tue, Oct 5, 2021 at 6:45 AM Andrew Jones <drjones@xxxxxxxxxx> wrote:
>
> On Thu, Sep 23, 2021 at 07:16:09PM +0000, Oliver Upton wrote:
> > Split up the current test into several helpers that will be useful to
> > subsequent test cases added to the PSCI test suite.
> >
> > Signed-off-by: Oliver Upton <oupton@xxxxxxxxxx>
> > ---
> > .../testing/selftests/kvm/aarch64/psci_test.c | 68 ++++++++++++-------
> > 1 file changed, 45 insertions(+), 23 deletions(-)
> >
> > diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
> > index 8d043e12b137..90312be335da 100644
> > --- a/tools/testing/selftests/kvm/aarch64/psci_test.c
> > +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
> > @@ -45,7 +45,7 @@ static uint64_t psci_affinity_info(uint64_t target_affinity,
> > return res.a0;
> > }
> >
> > -static void guest_main(uint64_t target_cpu)
> > +static void guest_test_cpu_on(uint64_t target_cpu)
> > {
> > GUEST_ASSERT(!psci_cpu_on(target_cpu, CPU_ON_ENTRY_ADDR, CPU_ON_CONTEXT_ID));
> > uint64_t target_state;
> > @@ -69,12 +69,10 @@ static void vcpu_power_off(struct kvm_vm *vm, uint32_t vcpuid)
> > vcpu_set_mp_state(vm, vcpuid, &mp_state);
> > }
> >
> > -int main(void)
> > +static struct kvm_vm *setup_vm(void *guest_code)
> > {
> > - uint64_t target_mpidr, obs_pc, obs_x0;
> > struct kvm_vcpu_init init;
> > struct kvm_vm *vm;
> > - struct ucall uc;
> >
> > vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
> > kvm_vm_elf_load(vm, program_invocation_name);
> > @@ -83,31 +81,28 @@ int main(void)
> > vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &init);
> > 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);
> > + aarch64_vcpu_add_default(vm, VCPU_ID_SOURCE, &init, guest_code);
> > + aarch64_vcpu_add_default(vm, VCPU_ID_TARGET, &init, guest_code);
> >
> > - /*
> > - * make sure the target is already off when executing the test.
> > - */
> > - vcpu_power_off(vm, VCPU_ID_TARGET);
> > + return vm;
> > +}
> >
> > - get_reg(vm, VCPU_ID_TARGET, ARM64_SYS_REG(MPIDR_EL1), &target_mpidr);
> > - vcpu_args_set(vm, VCPU_ID_SOURCE, 1, target_mpidr & MPIDR_HWID_BITMASK);
> > - vcpu_run(vm, VCPU_ID_SOURCE);
> > +static void enter_guest(struct kvm_vm *vm, uint32_t vcpuid)
> > +{
> > + struct ucall uc;
> >
> > - switch (get_ucall(vm, VCPU_ID_SOURCE, &uc)) {
> > - case UCALL_DONE:
> > - break;
> > - case UCALL_ABORT:
> > + vcpu_run(vm, vcpuid);
> > + if (get_ucall(vm, vcpuid, &uc) == UCALL_ABORT)
> > TEST_FAIL("%s at %s:%ld", (const char *)uc.args[0], __FILE__,
> > uc.args[1]);
> > - break;
> > - default:
> > - TEST_FAIL("Unhandled ucall: %lu", uc.cmd);
> > - }
> > +}
> >
> > - get_reg(vm, VCPU_ID_TARGET, ARM64_CORE_REG(regs.pc), &obs_pc);
> > - get_reg(vm, VCPU_ID_TARGET, ARM64_CORE_REG(regs.regs[0]), &obs_x0);
> > +static void assert_vcpu_reset(struct kvm_vm *vm, uint32_t vcpuid)
> > +{
> > + uint64_t obs_pc, obs_x0;
> > +
> > + get_reg(vm, vcpuid, ARM64_CORE_REG(regs.pc), &obs_pc);
> > + get_reg(vm, vcpuid, ARM64_CORE_REG(regs.regs[0]), &obs_x0);
> >
> > TEST_ASSERT(obs_pc == CPU_ON_ENTRY_ADDR,
> > "unexpected target cpu pc: %lx (expected: %lx)",
> > @@ -115,7 +110,34 @@ int main(void)
> > TEST_ASSERT(obs_x0 == CPU_ON_CONTEXT_ID,
> > "unexpected target context id: %lx (expected: %lx)",
> > obs_x0, CPU_ON_CONTEXT_ID);
> > +}
> >
> > +static void host_test_cpu_on(void)
> > +{
> > + uint64_t target_mpidr;
> > + struct kvm_vm *vm;
> > + struct ucall uc;
> > +
> > + vm = setup_vm(guest_test_cpu_on);
> > +
> > + /*
> > + * make sure the target is already off when executing the test.
> > + */
> > + vcpu_power_off(vm, VCPU_ID_TARGET);
> > +
> > + get_reg(vm, VCPU_ID_TARGET, ARM64_SYS_REG(MPIDR_EL1), &target_mpidr);
> > + vcpu_args_set(vm, VCPU_ID_SOURCE, 1, target_mpidr & MPIDR_HWID_BITMASK);
> > + enter_guest(vm, VCPU_ID_SOURCE);
> > +
> > + if (get_ucall(vm, VCPU_ID_SOURCE, &uc) != UCALL_DONE)
> > + TEST_FAIL("Unhandled ucall: %lu", uc.cmd);
> > +
> > + assert_vcpu_reset(vm, VCPU_ID_TARGET);
> > kvm_vm_free(vm);
> > +}
> > +
> > +int main(void)
> > +{
> > + host_test_cpu_on();
> > return 0;
> > }
> > --
> > 2.33.0.685.g46640cef36-goog
> >
>
> Hard to read diff, but I think the refactoring comes out right.
Yeah, this one's nasty, sorry about that. Thanks for parsing it out, heh.
> Please do this refactoring before adding the new test in the next revision, though.
>
This is 10/11 in the series, and the test is 11/11. I'm not seeing any
context belonging to the last patch, but perhaps I'm missing something
obvious.
> Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
Thanks!
--
Best,
Oliver
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