[PATCH v4 48/49] KVM: arm64: selftests: vgic_irq: Add Group-0 enable test

Marc Zyngier
2025-11-20T17:26:08Z

Add a new test case that inject a Group-0 interrupt together
with a bunch of Group-1 interrupts, Ack/EOI the G1 interrupts,
and only then enable G0, expecting to get the G0 interrupt.

Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
tools/testing/selftests/kvm/arm64/vgic_irq.c | 49 ++++++++++++++++++++
1 file changed, 49 insertions(+)

diff --git a/tools/testing/selftests/kvm/arm64/vgic_irq.c b/tools/testing/selftests/kvm/arm64/vgic_irq.c
index a53ab809fe8ae..ff2c75749f5c5 100644
--- a/tools/testing/selftests/kvm/arm64/vgic_irq.c
+++ b/tools/testing/selftests/kvm/arm64/vgic_irq.c
@@ -846,6 +846,54 @@ static void guest_code_asym_dir(struct test_args *args, int cpuid)
GUEST_DONE();
}

+static void guest_code_group_en(struct test_args *args, int cpuid)
+{
+ uint32_t intid;
+
+ gic_init(GIC_V3, 2);
+
+ gic_set_eoi_split(0);
+ gic_set_priority_mask(CPU_PRIO_MASK);
+ /* SGI0 is G0, which is disabled */
+ gic_irq_set_group(0, 0);
+
+ /* Configure all SGIs with decreasing priority */
+ for (intid = 0; intid < MIN_PPI; intid++) {
+ gic_set_priority(intid, (intid + 1) * 8);
+ gic_irq_enable(intid);
+ gic_irq_set_pending(intid);
+ }
+
+ /* Ack and EOI all G1 interrupts */
+ for (int i = 1; i < MIN_PPI; i++) {
+ intid = wait_for_and_activate_irq();
+
+ GUEST_ASSERT(intid < MIN_PPI);
+ gic_set_eoi(intid);
+ isb();
+ }
+
+ /*
+ * Check that SGI0 is still pending, inactive, and that we cannot
+ * ack anything.
+ */
+ GUEST_ASSERT(gic_irq_get_pending(0));
+ GUEST_ASSERT(!gic_irq_get_active(0));
+ GUEST_ASSERT_IAR_EMPTY();
+ GUEST_ASSERT(read_sysreg_s(SYS_ICC_IAR0_EL1) == IAR_SPURIOUS);
+
+ /* Open the G0 gates, and verify we can ack SGI0 */
+ write_sysreg_s(1, SYS_ICC_IGRPEN0_EL1);
+ isb();
+
+ do {
+ intid = read_sysreg_s(SYS_ICC_IAR0_EL1);
+ } while (intid == IAR_SPURIOUS);
+
+ GUEST_ASSERT(intid == 0);
+ GUEST_DONE();
+}
+
static void *test_vcpu_run(void *arg)
{
struct kvm_vcpu *vcpu = arg;
@@ -962,6 +1010,7 @@ int main(int argc, char **argv)
test_vgic(nr_irqs, true /* level */, false /* eoi_split */);
test_vgic(nr_irqs, true /* level */, true /* eoi_split */);
test_vgic_two_cpus(guest_code_asym_dir);
+ test_vgic_two_cpus(guest_code_group_en);
} else {
test_vgic(nr_irqs, level_sensitive, eoi_split);
}
--
2.47.3