aboutsummaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/kvm/aarch64/vgic_init.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--tools/testing/selftests/kvm/aarch64/vgic_init.c718
1 files changed, 718 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
new file mode 100644
index 000000000000..9c131d977a1b
--- /dev/null
+++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
@@ -0,0 +1,718 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * vgic init sequence tests
+ *
+ * Copyright (C) 2020, Red Hat, Inc.
+ */
+#define _GNU_SOURCE
+#include <linux/kernel.h>
+#include <sys/syscall.h>
+#include <asm/kvm.h>
+#include <asm/kvm_para.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+#include "vgic.h"
+
+#define NR_VCPUS 4
+
+#define REG_OFFSET(vcpu, offset) (((uint64_t)vcpu << 32) | offset)
+
+#define GICR_TYPER 0x8
+
+#define VGIC_DEV_IS_V2(_d) ((_d) == KVM_DEV_TYPE_ARM_VGIC_V2)
+#define VGIC_DEV_IS_V3(_d) ((_d) == KVM_DEV_TYPE_ARM_VGIC_V3)
+
+struct vm_gic {
+ struct kvm_vm *vm;
+ int gic_fd;
+ uint32_t gic_dev_type;
+};
+
+static uint64_t max_phys_size;
+
+/*
+ * Helpers to access a redistributor register and verify the ioctl() failed or
+ * succeeded as expected, and provided the correct value on success.
+ */
+static void v3_redist_reg_get_errno(int gicv3_fd, int vcpu, int offset,
+ int want, const char *msg)
+{
+ uint32_t ignored_val;
+ int ret = __kvm_device_attr_get(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS,
+ REG_OFFSET(vcpu, offset), &ignored_val);
+
+ TEST_ASSERT(ret && errno == want, "%s; want errno = %d", msg, want);
+}
+
+static void v3_redist_reg_get(int gicv3_fd, int vcpu, int offset, uint32_t want,
+ const char *msg)
+{
+ uint32_t val;
+
+ kvm_device_attr_get(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS,
+ REG_OFFSET(vcpu, offset), &val);
+ TEST_ASSERT(val == want, "%s; want '0x%x', got '0x%x'", msg, want, val);
+}
+
+/* dummy guest code */
+static void guest_code(void)
+{
+ GUEST_SYNC(0);
+ GUEST_SYNC(1);
+ GUEST_SYNC(2);
+ GUEST_DONE();
+}
+
+/* we don't want to assert on run execution, hence that helper */
+static int run_vcpu(struct kvm_vcpu *vcpu)
+{
+ ucall_init(vcpu->vm, NULL);
+
+ return __vcpu_run(vcpu) ? -errno : 0;
+}
+
+static struct vm_gic vm_gic_create_with_vcpus(uint32_t gic_dev_type,
+ uint32_t nr_vcpus,
+ struct kvm_vcpu *vcpus[])
+{
+ struct vm_gic v;
+
+ v.gic_dev_type = gic_dev_type;
+ v.vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);
+ v.gic_fd = kvm_create_device(v.vm, gic_dev_type);
+
+ return v;
+}
+
+static void vm_gic_destroy(struct vm_gic *v)
+{
+ close(v->gic_fd);
+ 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. 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_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_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, dist.attr);
+
+ kvm_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, rdist.attr);
+
+ /* check non existing attribute */
+ ret = __kvm_has_device_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 = dist.alignment / 0x10;
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ dist.attr, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "GIC dist base not aligned");
+
+ addr = rdist.alignment / 0x10;
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ rdist.attr, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "GIC redist/cpu base not aligned");
+
+ /* out of range address */
+ addr = max_phys_size;
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ dist.attr, &addr);
+ TEST_ASSERT(ret && errno == E2BIG, "dist address beyond IPA limit");
+
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ rdist.attr, &addr);
+ TEST_ASSERT(ret && errno == E2BIG, "redist address beyond IPA limit");
+
+ /* Space for half a rdist (a rdist is: 2 * rdist.alignment). */
+ addr = max_phys_size - dist.alignment;
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ rdist.attr, &addr);
+ TEST_ASSERT(ret && errno == E2BIG,
+ "half of the redist is beyond IPA limit");
+
+ /* set REDIST base address @0x0*/
+ addr = 0x00000;
+ kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ rdist.attr, &addr);
+
+ /* Attempt to create a second legacy redistributor region */
+ addr = 0xE0000;
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ rdist.attr, &addr);
+ TEST_ASSERT(ret && errno == EEXIST, "GIC redist base set again");
+
+ ret = __kvm_has_device_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_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ 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 = rdist.size - rdist.alignment;
+ kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ dist.attr, &addr);
+}
+
+/* Test the new REDIST region API */
+static void subtest_v3_redist_regions(struct vm_gic *v)
+{
+ uint64_t addr, expected_addr;
+ int ret;
+
+ ret = __kvm_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST);
+ TEST_ASSERT(!ret, "Multiple redist regions advertised");
+
+ addr = REDIST_REGION_ATTR_ADDR(NR_VCPUS, 0x100000, 2, 0);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "redist region attr value with flags != 0");
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0x100000, 0, 0);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "redist region attr value with count== 0");
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL,
+ "attempt to register the first rdist region with index != 0");
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x201000, 0, 1);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "rdist region with misaligned address");
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
+ kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "register an rdist region with already used index");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x210000, 0, 2);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL,
+ "register an rdist region overlapping with another one");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 2);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "register redist region with index not +1");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);
+ kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ addr = REDIST_REGION_ATTR_ADDR(1, max_phys_size, 0, 2);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == E2BIG,
+ "register redist region with base address beyond IPA range");
+
+ /* The last redist is above the pa range. */
+ addr = REDIST_REGION_ATTR_ADDR(2, max_phys_size - 0x30000, 0, 2);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == E2BIG,
+ "register redist region with top address beyond IPA range");
+
+ addr = 0x260000;
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr);
+ TEST_ASSERT(ret && errno == EINVAL,
+ "Mix KVM_VGIC_V3_ADDR_TYPE_REDIST and REDIST_REGION");
+
+ /*
+ * Now there are 2 redist regions:
+ * region 0 @ 0x200000 2 redists
+ * region 1 @ 0x240000 1 redist
+ * Attempt to read their characteristics
+ */
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 0);
+ expected_addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
+ ret = __kvm_device_attr_get(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(!ret && addr == expected_addr, "read characteristics of region #0");
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 1);
+ expected_addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);
+ ret = __kvm_device_attr_get(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(!ret && addr == expected_addr, "read characteristics of region #1");
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 2);
+ ret = __kvm_device_attr_get(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == ENOENT, "read characteristics of non existing region");
+
+ addr = 0x260000;
+ kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_DIST, &addr);
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x260000, 0, 2);
+ ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "register redist region colliding with dist");
+}
+
+/*
+ * VGIC KVM device is created and initialized before the secondary CPUs
+ * get created
+ */
+static void test_vgic_then_vcpus(uint32_t gic_dev_type)
+{
+ struct kvm_vcpu *vcpus[NR_VCPUS];
+ struct vm_gic v;
+ int ret, i;
+
+ v = vm_gic_create_with_vcpus(gic_dev_type, 1, vcpus);
+
+ subtest_dist_rdist(&v);
+
+ /* Add the rest of the VCPUs */
+ for (i = 1; i < NR_VCPUS; ++i)
+ vcpus[i] = vm_vcpu_add(v.vm, i, guest_code);
+
+ ret = run_vcpu(vcpus[3]);
+ TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
+
+ vm_gic_destroy(&v);
+}
+
+/* All the VCPUs are created before the VGIC KVM device gets initialized */
+static void test_vcpus_then_vgic(uint32_t gic_dev_type)
+{
+ struct kvm_vcpu *vcpus[NR_VCPUS];
+ struct vm_gic v;
+ int ret;
+
+ v = vm_gic_create_with_vcpus(gic_dev_type, NR_VCPUS, vcpus);
+
+ subtest_dist_rdist(&v);
+
+ ret = run_vcpu(vcpus[3]);
+ TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
+
+ vm_gic_destroy(&v);
+}
+
+static void test_v3_new_redist_regions(void)
+{
+ struct kvm_vcpu *vcpus[NR_VCPUS];
+ void *dummy = NULL;
+ struct vm_gic v;
+ uint64_t addr;
+ int ret;
+
+ v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);
+ subtest_v3_redist_regions(&v);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
+
+ ret = run_vcpu(vcpus[3]);
+ TEST_ASSERT(ret == -ENXIO, "running without sufficient number of rdists");
+ vm_gic_destroy(&v);
+
+ /* step2 */
+
+ v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);
+ subtest_v3_redist_regions(&v);
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ ret = run_vcpu(vcpus[3]);
+ TEST_ASSERT(ret == -EBUSY, "running without vgic explicit init");
+
+ vm_gic_destroy(&v);
+
+ /* step 3 */
+
+ v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);
+ subtest_v3_redist_regions(&v);
+
+ ret = __kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, dummy);
+ TEST_ASSERT(ret && errno == EFAULT,
+ "register a third region allowing to cover the 4 vcpus");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
+
+ ret = run_vcpu(vcpus[3]);
+ TEST_ASSERT(!ret, "vcpu run");
+
+ vm_gic_destroy(&v);
+}
+
+static void test_v3_typer_accesses(void)
+{
+ struct vm_gic v;
+ uint64_t addr;
+ int ret, i;
+
+ v.vm = vm_create(NR_VCPUS);
+ (void)vm_vcpu_add(v.vm, 0, guest_code);
+
+ v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);
+
+ (void)vm_vcpu_add(v.vm, 3, guest_code);
+
+ v3_redist_reg_get_errno(v.gic_fd, 1, GICR_TYPER, EINVAL,
+ "attempting to read GICR_TYPER of non created vcpu");
+
+ (void)vm_vcpu_add(v.vm, 1, guest_code);
+
+ v3_redist_reg_get_errno(v.gic_fd, 1, GICR_TYPER, EBUSY,
+ "read GICR_TYPER before GIC initialized");
+
+ (void)vm_vcpu_add(v.vm, 2, guest_code);
+
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
+
+ for (i = 0; i < NR_VCPUS ; i++) {
+ v3_redist_reg_get(v.gic_fd, i, GICR_TYPER, i * 0x100,
+ "read GICR_TYPER before rdist region setting");
+ }
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ /* The 2 first rdists should be put there (vcpu 0 and 3) */
+ v3_redist_reg_get(v.gic_fd, 0, GICR_TYPER, 0x0, "read typer of rdist #0");
+ v3_redist_reg_get(v.gic_fd, 3, GICR_TYPER, 0x310, "read typer of rdist #1");
+
+ addr = REDIST_REGION_ATTR_ADDR(10, 0x100000, 0, 1);
+ ret = __kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+ TEST_ASSERT(ret && errno == EINVAL, "collision with previous rdist region");
+
+ v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100,
+ "no redist region attached to vcpu #1 yet, last cannot be returned");
+ v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x200,
+ "no redist region attached to vcpu #2, last cannot be returned");
+
+ addr = REDIST_REGION_ATTR_ADDR(10, 0x20000, 0, 1);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100, "read typer of rdist #1");
+ v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x210,
+ "read typer of rdist #1, last properly returned");
+
+ vm_gic_destroy(&v);
+}
+
+static struct vm_gic vm_gic_v3_create_with_vcpuids(int nr_vcpus,
+ uint32_t vcpuids[])
+{
+ struct vm_gic v;
+ int i;
+
+ v.vm = vm_create(nr_vcpus);
+ for (i = 0; i < nr_vcpus; i++)
+ vm_vcpu_add(v.vm, vcpuids[i], guest_code);
+
+ v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);
+
+ return v;
+}
+
+/**
+ * Test GICR_TYPER last bit with new redist regions
+ * rdist regions #1 and #2 are contiguous
+ * rdist region #0 @0x100000 2 rdist capacity
+ * rdists: 0, 3 (Last)
+ * rdist region #1 @0x240000 2 rdist capacity
+ * rdists: 5, 4 (Last)
+ * rdist region #2 @0x200000 2 rdist capacity
+ * rdists: 1, 2
+ */
+static void test_v3_last_bit_redist_regions(void)
+{
+ uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };
+ struct vm_gic v;
+ uint64_t addr;
+
+ v = vm_gic_v3_create_with_vcpuids(ARRAY_SIZE(vcpuids), vcpuids);
+
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x100000, 0, 0);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x240000, 0, 1);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 2);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
+
+ v3_redist_reg_get(v.gic_fd, 0, GICR_TYPER, 0x000, "read typer of rdist #0");
+ v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100, "read typer of rdist #1");
+ v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x200, "read typer of rdist #2");
+ v3_redist_reg_get(v.gic_fd, 3, GICR_TYPER, 0x310, "read typer of rdist #3");
+ v3_redist_reg_get(v.gic_fd, 5, GICR_TYPER, 0x500, "read typer of rdist #5");
+ v3_redist_reg_get(v.gic_fd, 4, GICR_TYPER, 0x410, "read typer of rdist #4");
+
+ vm_gic_destroy(&v);
+}
+
+/* Test last bit with legacy region */
+static void test_v3_last_bit_single_rdist(void)
+{
+ uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };
+ struct vm_gic v;
+ uint64_t addr;
+
+ v = vm_gic_v3_create_with_vcpuids(ARRAY_SIZE(vcpuids), vcpuids);
+
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
+
+ addr = 0x10000;
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr);
+
+ v3_redist_reg_get(v.gic_fd, 0, GICR_TYPER, 0x000, "read typer of rdist #0");
+ v3_redist_reg_get(v.gic_fd, 3, GICR_TYPER, 0x300, "read typer of rdist #1");
+ v3_redist_reg_get(v.gic_fd, 5, GICR_TYPER, 0x500, "read typer of rdist #2");
+ v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100, "read typer of rdist #3");
+ v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x210, "read typer of rdist #3");
+
+ vm_gic_destroy(&v);
+}
+
+/* Uses the legacy REDIST region API. */
+static void test_v3_redist_ipa_range_check_at_vcpu_run(void)
+{
+ struct kvm_vcpu *vcpus[NR_VCPUS];
+ struct vm_gic v;
+ int ret, i;
+ uint64_t addr;
+
+ v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, 1, vcpus);
+
+ /* Set space for 3 redists, we have 1 vcpu, so this succeeds. */
+ addr = max_phys_size - (3 * 2 * 0x10000);
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr);
+
+ addr = 0x00000;
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_DIST, &addr);
+
+ /* Add the rest of the VCPUs */
+ for (i = 1; i < NR_VCPUS; ++i)
+ vcpus[i] = vm_vcpu_add(v.vm, i, guest_code);
+
+ kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
+
+ /* Attempt to run a vcpu without enough redist space. */
+ ret = run_vcpu(vcpus[2]);
+ TEST_ASSERT(ret && errno == EINVAL,
+ "redist base+size above PA range detected on 1st vcpu run");
+
+ vm_gic_destroy(&v);
+}
+
+static void test_v3_its_region(void)
+{
+ struct kvm_vcpu *vcpus[NR_VCPUS];
+ 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, vcpus);
+ its_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_ITS);
+
+ addr = 0x401000;
+ ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_ITS_ADDR_TYPE, &addr);
+ TEST_ASSERT(ret && errno == EINVAL,
+ "ITS region with misaligned address");
+
+ addr = max_phys_size;
+ ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_ITS_ADDR_TYPE, &addr);
+ TEST_ASSERT(ret && errno == E2BIG,
+ "register ITS region with base address beyond IPA range");
+
+ addr = max_phys_size - 0x10000;
+ ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_ITS_ADDR_TYPE, &addr);
+ TEST_ASSERT(ret && errno == E2BIG,
+ "Half of ITS region is beyond IPA range");
+
+ /* This one succeeds setting the ITS base */
+ addr = 0x400000;
+ kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_ITS_ADDR_TYPE, &addr);
+
+ addr = 0x300000;
+ ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_ITS_ADDR_TYPE, &addr);
+ 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).
+ */
+int test_kvm_device(uint32_t gic_dev_type)
+{
+ struct kvm_vcpu *vcpus[NR_VCPUS];
+ struct vm_gic v;
+ uint32_t other;
+ int ret;
+
+ v.vm = vm_create_with_vcpus(NR_VCPUS, guest_code, vcpus);
+
+ /* try to create a non existing KVM device */
+ ret = __kvm_test_create_device(v.vm, 0);
+ TEST_ASSERT(ret && errno == ENODEV, "unsupported device");
+
+ /* trial mode */
+ ret = __kvm_test_create_device(v.vm, gic_dev_type);
+ if (ret)
+ return ret;
+ v.gic_fd = kvm_create_device(v.vm, gic_dev_type);
+
+ ret = __kvm_create_device(v.vm, gic_dev_type);
+ TEST_ASSERT(ret < 0 && errno == EEXIST, "create GIC device twice");
+
+ /* try to create the other gic_dev_type */
+ other = VGIC_DEV_IS_V2(gic_dev_type) ? KVM_DEV_TYPE_ARM_VGIC_V3
+ : KVM_DEV_TYPE_ARM_VGIC_V2;
+
+ if (!__kvm_test_create_device(v.vm, other)) {
+ ret = __kvm_create_device(v.vm, other);
+ TEST_ASSERT(ret < 0 && (errno == EINVAL || errno == EEXIST),
+ "create GIC device while other version exists");
+ }
+
+ vm_gic_destroy(&v);
+
+ return 0;
+}
+
+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_new_redist_regions();
+ test_v3_typer_accesses();
+ 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();
+ }
+}
+
+int main(int ac, char **av)
+{
+ int ret;
+ int pa_bits;
+ int cnt_impl = 0;
+
+ pa_bits = vm_guest_mode_params[VM_MODE_DEFAULT].pa_bits;
+ max_phys_size = 1ULL << pa_bits;
+
+ ret = test_kvm_device(KVM_DEV_TYPE_ARM_VGIC_V3);
+ if (!ret) {
+ pr_info("Running GIC_v3 tests.\n");
+ run_tests(KVM_DEV_TYPE_ARM_VGIC_V3);
+ cnt_impl++;
+ }
+
+ ret = test_kvm_device(KVM_DEV_TYPE_ARM_VGIC_V2);
+ if (!ret) {
+ pr_info("Running GIC_v2 tests.\n");
+ run_tests(KVM_DEV_TYPE_ARM_VGIC_V2);
+ cnt_impl++;
+ }
+
+ if (!cnt_impl) {
+ print_skip("No GICv2 nor GICv3 support");
+ exit(KSFT_SKIP);
+ }
+ return 0;
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.