Re: [PATCH v4 11/11] KVM: arm64: selftests: Add init ITS device test

[Eric Auger <eric.auger@redhat.com>]

On 10/5/21 3:19 AM, Ricardo Koller wrote:
> Add some ITS device init tests: general KVM device tests (address not
> defined already, address aligned) and tests for the ITS region being
> within the addressable IPA range.
>
> Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>

Eric
> ---
>  .../testing/selftests/kvm/aarch64/vgic_init.c | 42 +++++++++++++++++++
>  1 file changed, 42 insertions(+)
>
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index 80be1940d2ad..c563489ff760 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -598,6 +598,47 @@ static void test_v3_redist_ipa_range_check_at_vcpu_run(void)
>  	vm_gic_destroy(&v);
>  }
>  
> +static void test_v3_its_region(void)
> +{
> +	struct vm_gic v;
> +	uint64_t addr;
> +	int its_fd, ret;
> +
> +	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS);
> +	its_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_ITS, false);
> +
> +	addr = 0x401000;
> +	ret = _kvm_device_access(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +			  KVM_VGIC_ITS_ADDR_TYPE, &addr, true);
> +	TEST_ASSERT(ret && errno == EINVAL,
> +		"ITS region with misaligned address");
> +
> +	addr = max_phys_size;
> +	ret = _kvm_device_access(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +			  KVM_VGIC_ITS_ADDR_TYPE, &addr, true);
> +	TEST_ASSERT(ret && errno == E2BIG,
> +		"register ITS region with base address beyond IPA range");
> +
> +	addr = max_phys_size - 0x10000;
> +	ret = _kvm_device_access(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +			  KVM_VGIC_ITS_ADDR_TYPE, &addr, true);
> +	TEST_ASSERT(ret && errno == E2BIG,
> +		"Half of ITS region is beyond IPA range");
> +
> +	/* This one succeeds setting the ITS base */
> +	addr = 0x400000;
> +	kvm_device_access(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +			  KVM_VGIC_ITS_ADDR_TYPE, &addr, true);
> +
> +	addr = 0x300000;
> +	ret = _kvm_device_access(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +			  KVM_VGIC_ITS_ADDR_TYPE, &addr, true);
> +	TEST_ASSERT(ret && errno == EEXIST, "ITS base set again");
> +
> +	close(its_fd);
> +	vm_gic_destroy(&v);
> +}
> +
>  /*
>   * Returns 0 if it's possible to create GIC device of a given type (V2 or V3).
>   */
> @@ -650,6 +691,7 @@ void run_tests(uint32_t gic_dev_type)
>  		test_v3_last_bit_redist_regions();
>  		test_v3_last_bit_single_rdist();
>  		test_v3_redist_ipa_range_check_at_vcpu_run();
> +		test_v3_its_region();
>  	}
>  }
>