Commit 88209c10 authored by Ricardo Koller's avatar Ricardo Koller Committed by Marc Zyngier
Browse files

KVM: selftests: Add IRQ GSI routing library functions 



Add an architecture independent wrapper function for creating and
writing IRQ GSI routing tables. Also add a function to add irqchip
entries.

Signed-off-by: default avatarRicardo Koller <ricarkol@google.com>
Acked-by: default avatarAndrew Jones <drjones@redhat.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211109023906.1091208-15-ricarkol@google.com
parent 90f50aca

tools/testing/selftests/kvm/include/kvm_util.h

+8 −0
Original line number Diff line number Diff line
@@ -252,6 +252,14 @@ int _vcpu_access_device_attr(struct kvm_vm *vm, uint32_t vcpuid, uint32_t group, 
int vcpu_access_device_attr(struct kvm_vm *vm, uint32_t vcpuid, uint32_t group,

			 uint64_t attr, void *val, bool write);



#define KVM_MAX_IRQ_ROUTES		4096



struct kvm_irq_routing *kvm_gsi_routing_create(void);

void kvm_gsi_routing_irqchip_add(struct kvm_irq_routing *routing,

		uint32_t gsi, uint32_t pin);

int _kvm_gsi_routing_write(struct kvm_vm *vm, struct kvm_irq_routing *routing);

void kvm_gsi_routing_write(struct kvm_vm *vm, struct kvm_irq_routing *routing);



const char *exit_reason_str(unsigned int exit_reason);



void virt_pgd_alloc(struct kvm_vm *vm);

tools/testing/selftests/kvm/lib/kvm_util.c

+51 −0
Original line number Diff line number Diff line
@@ -2107,6 +2107,57 @@ void kvm_irq_line(struct kvm_vm *vm, uint32_t irq, int level) 
	TEST_ASSERT(ret >= 0, "KVM_IRQ_LINE failed, rc: %i errno: %i", ret, errno);

}



struct kvm_irq_routing *kvm_gsi_routing_create(void)

{

	struct kvm_irq_routing *routing;

	size_t size;



	size = sizeof(struct kvm_irq_routing);

	/* Allocate space for the max number of entries: this wastes 196 KBs. */

	size += KVM_MAX_IRQ_ROUTES * sizeof(struct kvm_irq_routing_entry);

	routing = calloc(1, size);

	assert(routing);



	return routing;

}



void kvm_gsi_routing_irqchip_add(struct kvm_irq_routing *routing,

		uint32_t gsi, uint32_t pin)

{

	int i;



	assert(routing);

	assert(routing->nr < KVM_MAX_IRQ_ROUTES);



	i = routing->nr;

	routing->entries[i].gsi = gsi;

	routing->entries[i].type = KVM_IRQ_ROUTING_IRQCHIP;

	routing->entries[i].flags = 0;

	routing->entries[i].u.irqchip.irqchip = 0;

	routing->entries[i].u.irqchip.pin = pin;

	routing->nr++;

}



int _kvm_gsi_routing_write(struct kvm_vm *vm, struct kvm_irq_routing *routing)

{

	int ret;



	assert(routing);

	ret = ioctl(vm_get_fd(vm), KVM_SET_GSI_ROUTING, routing);

	free(routing);



	return ret;

}



void kvm_gsi_routing_write(struct kvm_vm *vm, struct kvm_irq_routing *routing)

{

	int ret;



	ret = _kvm_gsi_routing_write(vm, routing);

	TEST_ASSERT(ret == 0, "KVM_SET_GSI_ROUTING failed, rc: %i errno: %i",

				ret, errno);

}



/*

 * VM Dump

 *