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From: Eric Auger <eric.auger@redhat.com>
To: Ricardo Koller <ricarkol@google.com>,
	kvm@vger.kernel.org, maz@kernel.org,
	kvmarm@lists.cs.columbia.edu, drjones@redhat.com,
	alexandru.elisei@arm.com
Cc: pshier@google.com, Paolo Bonzini <pbonzini@redhat.com>, shuah@kernel.org
Subject: Re: [PATCH v4 08/11] KVM: arm64: selftests: Add some tests for GICv2 in vgic_init
Date: Tue, 5 Oct 2021 10:09:26 +0200	[thread overview]
Message-ID: <9e153c26-005c-d545-67b0-a8505d62ca4f@redhat.com> (raw)
In-Reply-To: <20211005011921.437353-9-ricarkol@google.com>

Ricardo,

On 10/5/21 3:19 AM, Ricardo Koller wrote:
> Add some GICv2 tests: general KVM device tests and DIST/CPUIF overlap
> tests.  Do this by making test_vcpus_then_vgic and test_vgic_then_vcpus
> in vgic_init GIC version agnostic.
>
> Signed-off-by: Ricardo Koller <ricarkol@google.com>

Reviewed-by: Eric Auger <eric.auger@redhat.com>

Thanks

Eric

> ---
>  .../testing/selftests/kvm/aarch64/vgic_init.c | 111 +++++++++++++-----
>  1 file changed, 79 insertions(+), 32 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> index 7521dc80cf23..cb69e195ad1d 100644
> --- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
> +++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
> @@ -79,74 +79,120 @@ static void vm_gic_destroy(struct vm_gic *v)
>  	kvm_vm_free(v->vm);
>  }
>  
> +struct vgic_region_attr {
> +	uint64_t attr;
> +	uint64_t size;
> +	uint64_t alignment;
> +};
> +
> +struct vgic_region_attr gic_v3_dist_region = {
> +	.attr = KVM_VGIC_V3_ADDR_TYPE_DIST,
> +	.size = 0x10000,
> +	.alignment = 0x10000,
> +};
> +
> +struct vgic_region_attr gic_v3_redist_region = {
> +	.attr = KVM_VGIC_V3_ADDR_TYPE_REDIST,
> +	.size = NR_VCPUS * 0x20000,
> +	.alignment = 0x10000,
> +};
> +
> +struct vgic_region_attr gic_v2_dist_region = {
> +	.attr = KVM_VGIC_V2_ADDR_TYPE_DIST,
> +	.size = 0x1000,
> +	.alignment = 0x1000,
> +};
> +
> +struct vgic_region_attr gic_v2_cpu_region = {
> +	.attr = KVM_VGIC_V2_ADDR_TYPE_CPU,
> +	.size = 0x2000,
> +	.alignment = 0x1000,
> +};
> +
>  /**
> - * Helper routine that performs KVM device tests in general and
> - * especially ARM_VGIC_V3 ones. Eventually the ARM_VGIC_V3
> - * device gets created, a legacy RDIST region is set at @0x0
> - * and a DIST region is set @0x60000
> + * Helper routine that performs KVM device tests in general. Eventually the
> + * ARM_VGIC (GICv2 or GICv3) device gets created with an overlapping
> + * DIST/REDIST (or DIST/CPUIF for GICv2). Assumption is 4 vcpus are going to be
> + * used hence the overlap. In the case of GICv3, A RDIST region is set at @0x0
> + * and a DIST region is set @0x70000. The GICv2 case sets a CPUIF @0x0 and a
> + * DIST region @0x1000.
>   */
> -static void subtest_v3_dist_rdist(struct vm_gic *v)
> +static void subtest_dist_rdist(struct vm_gic *v)
>  {
>  	int ret;
>  	uint64_t addr;
> +	struct vgic_region_attr rdist; /* CPU interface in GICv2*/
> +	struct vgic_region_attr dist;
> +
> +	rdist = VGIC_DEV_IS_V3(v->gic_dev_type) ? gic_v3_redist_region
> +						: gic_v2_cpu_region;
> +	dist = VGIC_DEV_IS_V3(v->gic_dev_type) ? gic_v3_dist_region
> +						: gic_v2_dist_region;
>  
>  	/* Check existing group/attributes */
>  	kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -			      KVM_VGIC_V3_ADDR_TYPE_DIST);
> +			      dist.attr);
>  
>  	kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -			      KVM_VGIC_V3_ADDR_TYPE_REDIST);
> +			      rdist.attr);
>  
>  	/* check non existing attribute */
> -	ret = _kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, 0);
> +	ret = _kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, -1);
>  	TEST_ASSERT(ret && errno == ENXIO, "attribute not supported");
>  
>  	/* misaligned DIST and REDIST address settings */
> -	addr = 0x1000;
> +	addr = dist.alignment / 0x10;
>  	ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -				 KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
> -	TEST_ASSERT(ret && errno == EINVAL, "GICv3 dist base not 64kB aligned");
> +				 dist.attr, &addr, true);
> +	TEST_ASSERT(ret && errno == EINVAL, "GIC dist base not aligned");
>  
> +	addr = rdist.alignment / 0x10;
>  	ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -				 KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
> -	TEST_ASSERT(ret && errno == EINVAL, "GICv3 redist base not 64kB aligned");
> +				 rdist.attr, &addr, true);
> +	TEST_ASSERT(ret && errno == EINVAL, "GIC redist/cpu base not aligned");
>  
>  	/* out of range address */
>  	if (max_ipa_bits) {
>  		addr = 1ULL << max_ipa_bits;
>  		ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -					 KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
> +					 dist.attr, &addr, true);
>  		TEST_ASSERT(ret && errno == E2BIG, "dist address beyond IPA limit");
>  
>  		ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -					 KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
> +					 rdist.attr, &addr, true);
>  		TEST_ASSERT(ret && errno == E2BIG, "redist address beyond IPA limit");
>  	}
>  
>  	/* set REDIST base address @0x0*/
>  	addr = 0x00000;
>  	kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -			  KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
> +			  rdist.attr, &addr, true);
>  
>  	/* Attempt to create a second legacy redistributor region */
>  	addr = 0xE0000;
>  	ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -				 KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
> -	TEST_ASSERT(ret && errno == EEXIST, "GICv3 redist base set again");
> +				 rdist.attr, &addr, true);
> +	TEST_ASSERT(ret && errno == EEXIST, "GIC redist base set again");
>  
> -	/* Attempt to mix legacy and new redistributor regions */
> -	addr = REDIST_REGION_ATTR_ADDR(NR_VCPUS, 0x100000, 0, 0);
> -	ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> -				 KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
> -	TEST_ASSERT(ret && errno == EINVAL, "attempt to mix GICv3 REDIST and REDIST_REGION");
> +	ret = _kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +				     KVM_VGIC_V3_ADDR_TYPE_REDIST);
> +	if (!ret) {
> +		/* Attempt to mix legacy and new redistributor regions */
> +		addr = REDIST_REGION_ATTR_ADDR(NR_VCPUS, 0x100000, 0, 0);
> +		ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +					 KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION,
> +					 &addr, true);
> +		TEST_ASSERT(ret && errno == EINVAL,
> +			    "attempt to mix GICv3 REDIST and REDIST_REGION");
> +	}
>  
>  	/*
>  	 * Set overlapping DIST / REDIST, cannot be detected here. Will be detected
>  	 * on first vcpu run instead.
>  	 */
> -	addr = 3 * 2 * 0x10000;
> -	kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V3_ADDR_TYPE_DIST,
> -			  &addr, true);
> +	addr = rdist.size - rdist.alignment;
> +	kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
> +			  dist.attr, &addr, true);
>  }
>  
>  /* Test the new REDIST region API */
> @@ -254,14 +300,14 @@ static void subtest_v3_redist_regions(struct vm_gic *v)
>   * VGIC KVM device is created and initialized before the secondary CPUs
>   * get created
>   */
> -static void test_v3_vgic_then_vcpus(uint32_t gic_dev_type)
> +static void test_vgic_then_vcpus(uint32_t gic_dev_type)
>  {
>  	struct vm_gic v;
>  	int ret, i;
>  
>  	v = vm_gic_create_with_vcpus(gic_dev_type, 1);
>  
> -	subtest_v3_dist_rdist(&v);
> +	subtest_dist_rdist(&v);
>  
>  	/* Add the rest of the VCPUs */
>  	for (i = 1; i < NR_VCPUS; ++i)
> @@ -274,14 +320,14 @@ static void test_v3_vgic_then_vcpus(uint32_t gic_dev_type)
>  }
>  
>  /* All the VCPUs are created before the VGIC KVM device gets initialized */
> -static void test_v3_vcpus_then_vgic(uint32_t gic_dev_type)
> +static void test_vcpus_then_vgic(uint32_t gic_dev_type)
>  {
>  	struct vm_gic v;
>  	int ret;
>  
>  	v = vm_gic_create_with_vcpus(gic_dev_type, NR_VCPUS);
>  
> -	subtest_v3_dist_rdist(&v);
> +	subtest_dist_rdist(&v);
>  
>  	ret = run_vcpu(v.vm, 3);
>  	TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
> @@ -550,9 +596,10 @@ int test_kvm_device(uint32_t gic_dev_type)
>  
>  void run_tests(uint32_t gic_dev_type)
>  {
> +	test_vcpus_then_vgic(gic_dev_type);
> +	test_vgic_then_vcpus(gic_dev_type);
> +
>  	if (VGIC_DEV_IS_V3(gic_dev_type)) {
> -		test_v3_vcpus_then_vgic(gic_dev_type);
> -		test_v3_vgic_then_vcpus(gic_dev_type);
>  		test_v3_new_redist_regions();
>  		test_v3_typer_accesses();
>  		test_v3_last_bit_redist_regions();

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  reply	other threads:[~2021-10-05  8:09 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-05  1:19 [PATCH v4 00/11] KVM: arm64: vgic: Missing checks for REDIST/CPU and ITS regions above the VM IPA size Ricardo Koller
2021-10-05  1:19 ` [PATCH v4 01/11] kvm: arm64: vgic: Introduce vgic_check_iorange Ricardo Koller
2021-10-05  1:19 ` [PATCH v4 02/11] KVM: arm64: vgic-v3: Check redist region is not above the VM IPA size Ricardo Koller
2021-10-05  1:19 ` [PATCH v4 03/11] KVM: arm64: vgic-v2: Check cpu interface " Ricardo Koller
2021-10-05  1:19 ` [PATCH v4 04/11] KVM: arm64: vgic-v3: Check ITS " Ricardo Koller
2021-10-05  1:19 ` [PATCH v4 05/11] KVM: arm64: vgic: Drop vgic_check_ioaddr() Ricardo Koller
2021-10-05  7:56   ` Eric Auger
2021-10-05  1:19 ` [PATCH v4 06/11] KVM: arm64: selftests: Make vgic_init gic version agnostic Ricardo Koller
2021-10-06  9:46   ` Andrew Jones
2021-10-05  1:19 ` [PATCH v4 07/11] KVM: arm64: selftests: Make vgic_init/vm_gic_create " Ricardo Koller
2021-10-06  9:47   ` Andrew Jones
2021-10-05  1:19 ` [PATCH v4 08/11] KVM: arm64: selftests: Add some tests for GICv2 in vgic_init Ricardo Koller
2021-10-05  8:09   ` Eric Auger [this message]
2021-10-06  9:52   ` Andrew Jones
2021-10-05  1:19 ` [PATCH v4 09/11] KVM: arm64: selftests: Add tests for GIC redist/cpuif partially above IPA range Ricardo Koller
2021-10-05  8:12   ` Eric Auger
2021-10-06 10:07   ` Andrew Jones
2021-10-05  1:19 ` [PATCH v4 10/11] KVM: arm64: selftests: Add test for legacy GICv3 REDIST base " Ricardo Koller
2021-10-06 10:12   ` Andrew Jones
2021-10-05  1:19 ` [PATCH v4 11/11] KVM: arm64: selftests: Add init ITS device test Ricardo Koller
2021-10-05  8:06   ` Eric Auger
2021-10-06 10:13   ` Andrew Jones
2021-10-11  8:43 ` [PATCH v4 00/11] KVM: arm64: vgic: Missing checks for REDIST/CPU and ITS regions above the VM IPA size Marc Zyngier

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