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KVM: arm64: selftests: vgic_irq: Add timer deactivation test

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Add a new test case that triggers the HW deactivation emulation path
when trapping ICV_DIR_EL1. This is obviously tied to the way KVM
works now, but the test follows the expected architectural behaviour.

Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-50-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
This commit is contained in:
Marc Zyngier 2025-11-20 17:25:39 +00:00 committed by Oliver Upton
parent 1c9c71ac1b
commit de88423277
1 changed files with 65 additions and 0 deletions
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65
tools/testing/selftests/kvm/arm64/vgic_irq.c
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@ -894,6 +894,70 @@ static void guest_code_group_en(struct test_args *args, int cpuid)
GUEST_DONE();
}
static void guest_code_timer_spi(struct test_args *args, int cpuid)
{
uint32_t intid;
u64 val;
gic_init(GIC_V3, 2);
gic_set_eoi_split(1);
gic_set_priority_mask(CPU_PRIO_MASK);
/* Add a pending SPI so that KVM starts trapping DIR */
gic_set_priority(MIN_SPI + cpuid, IRQ_DEFAULT_PRIO);
gic_irq_set_pending(MIN_SPI + cpuid);
/* Configure the timer with a higher priority, make it pending */
gic_set_priority(27, IRQ_DEFAULT_PRIO - 8);
isb();
val = read_sysreg(cntvct_el0);
write_sysreg(val, cntv_cval_el0);
write_sysreg(1, cntv_ctl_el0);
isb();
GUEST_ASSERT(gic_irq_get_pending(27));
/* Enable both interrupts */
gic_irq_enable(MIN_SPI + cpuid);
gic_irq_enable(27);
/* The timer must fire */
intid = wait_for_and_activate_irq();
GUEST_ASSERT(intid == 27);
/* Check that we can deassert it */
write_sysreg(0, cntv_ctl_el0);
isb();
GUEST_ASSERT(!gic_irq_get_pending(27));
/*
* Priority drop, deactivation -- we expect that the host
* deactivation will have been effective
*/
gic_set_eoi(27);
gic_set_dir(27);
GUEST_ASSERT(!gic_irq_get_active(27));
/* Do it one more time */
isb();
val = read_sysreg(cntvct_el0);
write_sysreg(val, cntv_cval_el0);
write_sysreg(1, cntv_ctl_el0);
isb();
GUEST_ASSERT(gic_irq_get_pending(27));
/* The timer must fire again */
intid = wait_for_and_activate_irq();
GUEST_ASSERT(intid == 27);
GUEST_DONE();
}
static void *test_vcpu_run(void *arg)
{
struct kvm_vcpu *vcpu = arg;
@ -1011,6 +1075,7 @@ int main(int argc, char **argv)
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);
test_vgic_two_cpus(guest_code_timer_spi);
} else {
test_vgic(nr_irqs, level_sensitive, eoi_split);
}