From: Ricardo Koller ricarkol@google.com

[ Upstream commit 11024a7a0ac26dd31ddfa0f6590e158bdf9ab858 ]

The guest in vgic_irq gets its arguments in a struct. This struct used to fit nicely in a single register so vcpu_args_set() was able to pass it by value by setting x0 with it. Unfortunately, this args struct grew after some commits and some guest args became random (specically kvm_supports_irqfd).

Fix this by passing the guest args as a pointer (after allocating some guest memory for it).

Signed-off-by: Ricardo Koller ricarkol@google.com Reported-by: Reiji Watanabe reijiw@google.com Cc: Andrew Jones drjones@redhat.com Reviewed-by: Andrew Jones drjones@redhat.com Signed-off-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/r/20220127030858.3269036-3-ricarkol@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../testing/selftests/kvm/aarch64/vgic_irq.c | 29 ++++++++++--------- 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/tools/testing/selftests/kvm/aarch64/vgic_irq.c b/tools/testing/selftests/kvm/aarch64/vgic_irq.c index 7eca97799917..7f3afee5cc00 100644 --- a/tools/testing/selftests/kvm/aarch64/vgic_irq.c +++ b/tools/testing/selftests/kvm/aarch64/vgic_irq.c @@ -472,10 +472,10 @@ static void test_restore_active(struct test_args *args, struct kvm_inject_desc * guest_restore_active(args, MIN_SPI, 4, f->cmd); }

-static void guest_code(struct test_args args) +static void guest_code(struct test_args *args) { - uint32_t i, nr_irqs = args.nr_irqs; - bool level_sensitive = args.level_sensitive; + uint32_t i, nr_irqs = args->nr_irqs; + bool level_sensitive = args->level_sensitive; struct kvm_inject_desc *f, *inject_fns;

gic_init(GIC_V3, 1, dist, redist); @@ -484,11 +484,11 @@ static void guest_code(struct test_args args) gic_irq_enable(i);

for (i = MIN_SPI; i < nr_irqs; i++) - gic_irq_set_config(i, !args.level_sensitive); + gic_irq_set_config(i, !level_sensitive);

- gic_set_eoi_split(args.eoi_split); + gic_set_eoi_split(args->eoi_split);

- reset_priorities(&args); + reset_priorities(args); gic_set_priority_mask(CPU_PRIO_MASK);

inject_fns = level_sensitive ? inject_level_fns @@ -497,17 +497,17 @@ static void guest_code(struct test_args args) local_irq_enable();

/* Start the tests. */ - for_each_supported_inject_fn(&args, inject_fns, f) { - test_injection(&args, f); - test_preemption(&args, f); - test_injection_failure(&args, f); + for_each_supported_inject_fn(args, inject_fns, f) { + test_injection(args, f); + test_preemption(args, f); + test_injection_failure(args, f); }

/* Restore the active state of IRQs. This would happen when live * migrating IRQs in the middle of being handled. */ - for_each_supported_activate_fn(&args, set_active_fns, f) - test_restore_active(&args, f); + for_each_supported_activate_fn(args, set_active_fns, f) + test_restore_active(args, f);

GUEST_DONE(); } @@ -739,6 +739,7 @@ static void test_vgic(uint32_t nr_irqs, bool level_sensitive, bool eoi_split) int gic_fd; struct kvm_vm *vm; struct kvm_inject_args inject_args; + vm_vaddr_t args_gva;

struct test_args args = { .nr_irqs = nr_irqs, @@ -757,7 +758,9 @@ static void test_vgic(uint32_t nr_irqs, bool level_sensitive, bool eoi_split) vcpu_init_descriptor_tables(vm, VCPU_ID);

/* Setup the guest args page (so it gets the args). */ - vcpu_args_set(vm, 0, 1, args); + args_gva = vm_vaddr_alloc_page(vm); + memcpy(addr_gva2hva(vm, args_gva), &args, sizeof(args)); + vcpu_args_set(vm, 0, 1, args_gva);

gic_fd = vgic_v3_setup(vm, 1, nr_irqs, GICD_BASE_GPA, GICR_BASE_GPA);