| Message ID | 20200131100205.74720-7-frankja@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: s390: Add new reset vcpu API | expand |
On Fri, 31 Jan 2020 05:02:05 -0500 Janosch Frank <frankja@linux.ibm.com> wrote: > From: Pierre Morel <pmorel@linux.ibm.com> > > Local IRQs are reset by a normal cpu reset. The initial cpu reset and > the clear cpu reset, as superset of the normal reset, both clear the > IRQs too. > > Let's inject an interrupt to a vCPU before calling a reset and see if > it is gone after the reset. > > We choose to inject only an emergency interrupt at this point and can > extend the test to other types of IRQs later. > > Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> > Signed-off-by: Janosch Frank <frankja@linux.ibm.com>[minor fixups] I usually keep a blank between the email address and any annotations (not sure if that might trip some scripts). > --- > tools/testing/selftests/kvm/s390x/resets.c | 42 ++++++++++++++++++++++ > 1 file changed, 42 insertions(+) Reviewed-by: Cornelia Huck <cohuck@redhat.com>
On 31/01/2020 11.02, Janosch Frank wrote: > From: Pierre Morel <pmorel@linux.ibm.com> > > Local IRQs are reset by a normal cpu reset. The initial cpu reset and > the clear cpu reset, as superset of the normal reset, both clear the > IRQs too. > > Let's inject an interrupt to a vCPU before calling a reset and see if > it is gone after the reset. > > We choose to inject only an emergency interrupt at this point and can > extend the test to other types of IRQs later. > > Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> > Signed-off-by: Janosch Frank <frankja@linux.ibm.com>[minor fixups] > --- > tools/testing/selftests/kvm/s390x/resets.c | 42 ++++++++++++++++++++++ > 1 file changed, 42 insertions(+) Reviewed-by: Thomas Huth <thuth@redhat.com>
On 31.01.20 11:02, Janosch Frank wrote: > From: Pierre Morel <pmorel@linux.ibm.com> > > Local IRQs are reset by a normal cpu reset. The initial cpu reset and > the clear cpu reset, as superset of the normal reset, both clear the > IRQs too. > > Let's inject an interrupt to a vCPU before calling a reset and see if > it is gone after the reset. > > We choose to inject only an emergency interrupt at this point and can > extend the test to other types of IRQs later. > > Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> > Signed-off-by: Janosch Frank <frankja@linux.ibm.com>[minor fixups] thanks applied.
diff --git a/tools/testing/selftests/kvm/s390x/resets.c b/tools/testing/selftests/kvm/s390x/resets.c index fb8e976943a9..1485bc6c8999 100644 --- a/tools/testing/selftests/kvm/s390x/resets.c +++ b/tools/testing/selftests/kvm/s390x/resets.c @@ -14,6 +14,9 @@ #include "kvm_util.h" #define VCPU_ID 3 +#define LOCAL_IRQS 32 + +struct kvm_s390_irq buf[VCPU_ID + LOCAL_IRQS]; struct kvm_vm *vm; struct kvm_run *run; @@ -53,6 +56,23 @@ static void test_one_reg(uint64_t id, uint64_t value) TEST_ASSERT(eval_reg == value, "value == %s", value); } +static void assert_noirq(void) +{ + struct kvm_s390_irq_state irq_state; + int irqs; + + irq_state.len = sizeof(buf); + irq_state.buf = (unsigned long)buf; + irqs = _vcpu_ioctl(vm, VCPU_ID, KVM_S390_GET_IRQ_STATE, &irq_state); + /* + * irqs contains the number of retrieved interrupts. Any interrupt + * (notably, the emergency call interrupt we have injected) should + * be cleared by the resets, so this should be 0. + */ + TEST_ASSERT(irqs >= 0, "Could not fetch IRQs: errno %d\n", errno); + TEST_ASSERT(!irqs, "IRQ pending"); +} + static void assert_clear(void) { struct kvm_sregs sregs; @@ -94,6 +114,22 @@ static void assert_initial(void) static void assert_normal(void) { test_one_reg(KVM_REG_S390_PFTOKEN, KVM_S390_PFAULT_TOKEN_INVALID); + assert_noirq(); +} + +static void inject_irq(int cpu_id) +{ + struct kvm_s390_irq_state irq_state; + struct kvm_s390_irq *irq = &buf[0]; + int irqs; + + /* Inject IRQ */ + irq_state.len = sizeof(struct kvm_s390_irq); + irq_state.buf = (unsigned long)buf; + irq->type = KVM_S390_INT_EMERGENCY; + irq->u.emerg.code = cpu_id; + irqs = _vcpu_ioctl(vm, cpu_id, KVM_S390_SET_IRQ_STATE, &irq_state); + TEST_ASSERT(irqs >= 0, "Error injecting EMERGENCY IRQ errno %d\n", errno); } static void test_normal(void) @@ -106,6 +142,8 @@ static void test_normal(void) vcpu_run(vm, VCPU_ID); + inject_irq(VCPU_ID); + vcpu_ioctl(vm, VCPU_ID, KVM_S390_NORMAL_RESET, 0); assert_normal(); kvm_vm_free(vm); @@ -120,6 +158,8 @@ static void test_initial(void) vcpu_run(vm, VCPU_ID); + inject_irq(VCPU_ID); + vcpu_ioctl(vm, VCPU_ID, KVM_S390_INITIAL_RESET, 0); assert_normal(); assert_initial(); @@ -135,6 +175,8 @@ static void test_clear(void) vcpu_run(vm, VCPU_ID); + inject_irq(VCPU_ID); + vcpu_ioctl(vm, VCPU_ID, KVM_S390_CLEAR_RESET, 0); assert_normal(); assert_initial();