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1// SPDX-License-Identifier: GPL-2.02/*3 * vgic init sequence tests4 *5 * Copyright (C) 2020, Red Hat, Inc.6 */7#include <linux/kernel.h>8#include <sys/syscall.h>9#include <asm/kvm.h>10#include <asm/kvm_para.h>11 12#include "test_util.h"13#include "kvm_util.h"14#include "processor.h"15#include "vgic.h"16 17#define NR_VCPUS		418 19#define REG_OFFSET(vcpu, offset) (((uint64_t)vcpu << 32) | offset)20 21#define GICR_TYPER 0x822 23#define VGIC_DEV_IS_V2(_d) ((_d) == KVM_DEV_TYPE_ARM_VGIC_V2)24#define VGIC_DEV_IS_V3(_d) ((_d) == KVM_DEV_TYPE_ARM_VGIC_V3)25 26struct vm_gic {27	struct kvm_vm *vm;28	int gic_fd;29	uint32_t gic_dev_type;30};31 32static uint64_t max_phys_size;33 34/*35 * Helpers to access a redistributor register and verify the ioctl() failed or36 * succeeded as expected, and provided the correct value on success.37 */38static void v3_redist_reg_get_errno(int gicv3_fd, int vcpu, int offset,39				    int want, const char *msg)40{41	uint32_t ignored_val;42	int ret = __kvm_device_attr_get(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS,43					REG_OFFSET(vcpu, offset), &ignored_val);44 45	TEST_ASSERT(ret && errno == want, "%s; want errno = %d", msg, want);46}47 48static void v3_redist_reg_get(int gicv3_fd, int vcpu, int offset, uint32_t want,49			      const char *msg)50{51	uint32_t val;52 53	kvm_device_attr_get(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS,54			    REG_OFFSET(vcpu, offset), &val);55	TEST_ASSERT(val == want, "%s; want '0x%x', got '0x%x'", msg, want, val);56}57 58/* dummy guest code */59static void guest_code(void)60{61	GUEST_SYNC(0);62	GUEST_SYNC(1);63	GUEST_SYNC(2);64	GUEST_DONE();65}66 67/* we don't want to assert on run execution, hence that helper */68static int run_vcpu(struct kvm_vcpu *vcpu)69{70	return __vcpu_run(vcpu) ? -errno : 0;71}72 73static struct vm_gic vm_gic_create_with_vcpus(uint32_t gic_dev_type,74					      uint32_t nr_vcpus,75					      struct kvm_vcpu *vcpus[])76{77	struct vm_gic v;78 79	v.gic_dev_type = gic_dev_type;80	v.vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);81	v.gic_fd = kvm_create_device(v.vm, gic_dev_type);82 83	return v;84}85 86static struct vm_gic vm_gic_create_barebones(uint32_t gic_dev_type)87{88	struct vm_gic v;89 90	v.gic_dev_type = gic_dev_type;91	v.vm = vm_create_barebones();92	v.gic_fd = kvm_create_device(v.vm, gic_dev_type);93 94	return v;95}96 97 98static void vm_gic_destroy(struct vm_gic *v)99{100	close(v->gic_fd);101	kvm_vm_free(v->vm);102}103 104struct vgic_region_attr {105	uint64_t attr;106	uint64_t size;107	uint64_t alignment;108};109 110struct vgic_region_attr gic_v3_dist_region = {111	.attr = KVM_VGIC_V3_ADDR_TYPE_DIST,112	.size = 0x10000,113	.alignment = 0x10000,114};115 116struct vgic_region_attr gic_v3_redist_region = {117	.attr = KVM_VGIC_V3_ADDR_TYPE_REDIST,118	.size = NR_VCPUS * 0x20000,119	.alignment = 0x10000,120};121 122struct vgic_region_attr gic_v2_dist_region = {123	.attr = KVM_VGIC_V2_ADDR_TYPE_DIST,124	.size = 0x1000,125	.alignment = 0x1000,126};127 128struct vgic_region_attr gic_v2_cpu_region = {129	.attr = KVM_VGIC_V2_ADDR_TYPE_CPU,130	.size = 0x2000,131	.alignment = 0x1000,132};133 134/**135 * Helper routine that performs KVM device tests in general. Eventually the136 * ARM_VGIC (GICv2 or GICv3) device gets created with an overlapping137 * DIST/REDIST (or DIST/CPUIF for GICv2). Assumption is 4 vcpus are going to be138 * used hence the overlap. In the case of GICv3, A RDIST region is set at @0x0139 * and a DIST region is set @0x70000. The GICv2 case sets a CPUIF @0x0 and a140 * DIST region @0x1000.141 */142static void subtest_dist_rdist(struct vm_gic *v)143{144	int ret;145	uint64_t addr;146	struct vgic_region_attr rdist; /* CPU interface in GICv2*/147	struct vgic_region_attr dist;148 149	rdist = VGIC_DEV_IS_V3(v->gic_dev_type) ? gic_v3_redist_region150						: gic_v2_cpu_region;151	dist = VGIC_DEV_IS_V3(v->gic_dev_type) ? gic_v3_dist_region152						: gic_v2_dist_region;153 154	/* Check existing group/attributes */155	kvm_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, dist.attr);156 157	kvm_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, rdist.attr);158 159	/* check non existing attribute */160	ret = __kvm_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, -1);161	TEST_ASSERT(ret && errno == ENXIO, "attribute not supported");162 163	/* misaligned DIST and REDIST address settings */164	addr = dist.alignment / 0x10;165	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,166				    dist.attr, &addr);167	TEST_ASSERT(ret && errno == EINVAL, "GIC dist base not aligned");168 169	addr = rdist.alignment / 0x10;170	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,171				    rdist.attr, &addr);172	TEST_ASSERT(ret && errno == EINVAL, "GIC redist/cpu base not aligned");173 174	/* out of range address */175	addr = max_phys_size;176	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,177				    dist.attr, &addr);178	TEST_ASSERT(ret && errno == E2BIG, "dist address beyond IPA limit");179 180	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,181				    rdist.attr, &addr);182	TEST_ASSERT(ret && errno == E2BIG, "redist address beyond IPA limit");183 184	/* Space for half a rdist (a rdist is: 2 * rdist.alignment). */185	addr = max_phys_size - dist.alignment;186	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,187				    rdist.attr, &addr);188	TEST_ASSERT(ret && errno == E2BIG,189			"half of the redist is beyond IPA limit");190 191	/* set REDIST base address @0x0*/192	addr = 0x00000;193	kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,194			    rdist.attr, &addr);195 196	/* Attempt to create a second legacy redistributor region */197	addr = 0xE0000;198	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,199				    rdist.attr, &addr);200	TEST_ASSERT(ret && errno == EEXIST, "GIC redist base set again");201 202	ret = __kvm_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,203				     KVM_VGIC_V3_ADDR_TYPE_REDIST);204	if (!ret) {205		/* Attempt to mix legacy and new redistributor regions */206		addr = REDIST_REGION_ATTR_ADDR(NR_VCPUS, 0x100000, 0, 0);207		ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,208					    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);209		TEST_ASSERT(ret && errno == EINVAL,210			    "attempt to mix GICv3 REDIST and REDIST_REGION");211	}212 213	/*214	 * Set overlapping DIST / REDIST, cannot be detected here. Will be detected215	 * on first vcpu run instead.216	 */217	addr = rdist.size - rdist.alignment;218	kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,219			    dist.attr, &addr);220}221 222/* Test the new REDIST region API */223static void subtest_v3_redist_regions(struct vm_gic *v)224{225	uint64_t addr, expected_addr;226	int ret;227 228	ret = __kvm_has_device_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,229				    KVM_VGIC_V3_ADDR_TYPE_REDIST);230	TEST_ASSERT(!ret, "Multiple redist regions advertised");231 232	addr = REDIST_REGION_ATTR_ADDR(NR_VCPUS, 0x100000, 2, 0);233	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,234				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);235	TEST_ASSERT(ret && errno == EINVAL, "redist region attr value with flags != 0");236 237	addr = REDIST_REGION_ATTR_ADDR(0, 0x100000, 0, 0);238	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,239				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);240	TEST_ASSERT(ret && errno == EINVAL, "redist region attr value with count== 0");241 242	addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);243	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,244				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);245	TEST_ASSERT(ret && errno == EINVAL,246		    "attempt to register the first rdist region with index != 0");247 248	addr = REDIST_REGION_ATTR_ADDR(2, 0x201000, 0, 1);249	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,250				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);251	TEST_ASSERT(ret && errno == EINVAL, "rdist region with misaligned address");252 253	addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);254	kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,255			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);256 257	addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);258	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,259				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);260	TEST_ASSERT(ret && errno == EINVAL, "register an rdist region with already used index");261 262	addr = REDIST_REGION_ATTR_ADDR(1, 0x210000, 0, 2);263	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,264				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);265	TEST_ASSERT(ret && errno == EINVAL,266		    "register an rdist region overlapping with another one");267 268	addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 2);269	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,270				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);271	TEST_ASSERT(ret && errno == EINVAL, "register redist region with index not +1");272 273	addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);274	kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,275			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);276 277	addr = REDIST_REGION_ATTR_ADDR(1, max_phys_size, 0, 2);278	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,279				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);280	TEST_ASSERT(ret && errno == E2BIG,281		    "register redist region with base address beyond IPA range");282 283	/* The last redist is above the pa range. */284	addr = REDIST_REGION_ATTR_ADDR(2, max_phys_size - 0x30000, 0, 2);285	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,286				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);287	TEST_ASSERT(ret && errno == E2BIG,288		    "register redist region with top address beyond IPA range");289 290	addr = 0x260000;291	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,292				    KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr);293	TEST_ASSERT(ret && errno == EINVAL,294		    "Mix KVM_VGIC_V3_ADDR_TYPE_REDIST and REDIST_REGION");295 296	/*297	 * Now there are 2 redist regions:298	 * region 0 @ 0x200000 2 redists299	 * region 1 @ 0x240000 1 redist300	 * Attempt to read their characteristics301	 */302 303	addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 0);304	expected_addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);305	ret = __kvm_device_attr_get(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,306				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);307	TEST_ASSERT(!ret && addr == expected_addr, "read characteristics of region #0");308 309	addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 1);310	expected_addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);311	ret = __kvm_device_attr_get(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,312				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);313	TEST_ASSERT(!ret && addr == expected_addr, "read characteristics of region #1");314 315	addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 2);316	ret = __kvm_device_attr_get(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,317				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);318	TEST_ASSERT(ret && errno == ENOENT, "read characteristics of non existing region");319 320	addr = 0x260000;321	kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,322			    KVM_VGIC_V3_ADDR_TYPE_DIST, &addr);323 324	addr = REDIST_REGION_ATTR_ADDR(1, 0x260000, 0, 2);325	ret = __kvm_device_attr_set(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,326				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);327	TEST_ASSERT(ret && errno == EINVAL, "register redist region colliding with dist");328}329 330/*331 * VGIC KVM device is created and initialized before the secondary CPUs332 * get created333 */334static void test_vgic_then_vcpus(uint32_t gic_dev_type)335{336	struct kvm_vcpu *vcpus[NR_VCPUS];337	struct vm_gic v;338	int ret, i;339 340	v = vm_gic_create_with_vcpus(gic_dev_type, 1, vcpus);341 342	subtest_dist_rdist(&v);343 344	/* Add the rest of the VCPUs */345	for (i = 1; i < NR_VCPUS; ++i)346		vcpus[i] = vm_vcpu_add(v.vm, i, guest_code);347 348	ret = run_vcpu(vcpus[3]);349	TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");350 351	vm_gic_destroy(&v);352}353 354/* All the VCPUs are created before the VGIC KVM device gets initialized */355static void test_vcpus_then_vgic(uint32_t gic_dev_type)356{357	struct kvm_vcpu *vcpus[NR_VCPUS];358	struct vm_gic v;359	int ret;360 361	v = vm_gic_create_with_vcpus(gic_dev_type, NR_VCPUS, vcpus);362 363	subtest_dist_rdist(&v);364 365	ret = run_vcpu(vcpus[3]);366	TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");367 368	vm_gic_destroy(&v);369}370 371#define KVM_VGIC_V2_ATTR(offset, cpu) \372	(FIELD_PREP(KVM_DEV_ARM_VGIC_OFFSET_MASK, offset) | \373	 FIELD_PREP(KVM_DEV_ARM_VGIC_CPUID_MASK, cpu))374 375#define GIC_CPU_CTRL	0x00376 377static void test_v2_uaccess_cpuif_no_vcpus(void)378{379	struct vm_gic v;380	u64 val = 0;381	int ret;382 383	v = vm_gic_create_barebones(KVM_DEV_TYPE_ARM_VGIC_V2);384	subtest_dist_rdist(&v);385 386	ret = __kvm_has_device_attr(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CPU_REGS,387				    KVM_VGIC_V2_ATTR(GIC_CPU_CTRL, 0));388	TEST_ASSERT(ret && errno == EINVAL,389		    "accessed non-existent CPU interface, want errno: %i",390		    EINVAL);391	ret = __kvm_device_attr_get(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CPU_REGS,392				    KVM_VGIC_V2_ATTR(GIC_CPU_CTRL, 0), &val);393	TEST_ASSERT(ret && errno == EINVAL,394		    "accessed non-existent CPU interface, want errno: %i",395		    EINVAL);396	ret = __kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CPU_REGS,397				    KVM_VGIC_V2_ATTR(GIC_CPU_CTRL, 0), &val);398	TEST_ASSERT(ret && errno == EINVAL,399		    "accessed non-existent CPU interface, want errno: %i",400		    EINVAL);401 402	vm_gic_destroy(&v);403}404 405static void test_v3_new_redist_regions(void)406{407	struct kvm_vcpu *vcpus[NR_VCPUS];408	void *dummy = NULL;409	struct vm_gic v;410	uint64_t addr;411	int ret;412 413	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);414	subtest_v3_redist_regions(&v);415	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,416			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);417 418	ret = run_vcpu(vcpus[3]);419	TEST_ASSERT(ret == -ENXIO, "running without sufficient number of rdists");420	vm_gic_destroy(&v);421 422	/* step2 */423 424	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);425	subtest_v3_redist_regions(&v);426 427	addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);428	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,429			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);430 431	ret = run_vcpu(vcpus[3]);432	TEST_ASSERT(ret == -EBUSY, "running without vgic explicit init");433 434	vm_gic_destroy(&v);435 436	/* step 3 */437 438	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);439	subtest_v3_redist_regions(&v);440 441	ret = __kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,442				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, dummy);443	TEST_ASSERT(ret && errno == EFAULT,444		    "register a third region allowing to cover the 4 vcpus");445 446	addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);447	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,448			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);449 450	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,451			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);452 453	ret = run_vcpu(vcpus[3]);454	TEST_ASSERT(!ret, "vcpu run");455 456	vm_gic_destroy(&v);457}458 459static void test_v3_typer_accesses(void)460{461	struct vm_gic v;462	uint64_t addr;463	int ret, i;464 465	v.vm = vm_create(NR_VCPUS);466	(void)vm_vcpu_add(v.vm, 0, guest_code);467 468	v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);469 470	(void)vm_vcpu_add(v.vm, 3, guest_code);471 472	v3_redist_reg_get_errno(v.gic_fd, 1, GICR_TYPER, EINVAL,473				"attempting to read GICR_TYPER of non created vcpu");474 475	(void)vm_vcpu_add(v.vm, 1, guest_code);476 477	v3_redist_reg_get_errno(v.gic_fd, 1, GICR_TYPER, EBUSY,478				"read GICR_TYPER before GIC initialized");479 480	(void)vm_vcpu_add(v.vm, 2, guest_code);481 482	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,483			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);484 485	for (i = 0; i < NR_VCPUS ; i++) {486		v3_redist_reg_get(v.gic_fd, i, GICR_TYPER, i * 0x100,487				  "read GICR_TYPER before rdist region setting");488	}489 490	addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);491	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,492			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);493 494	/* The 2 first rdists should be put there (vcpu 0 and 3) */495	v3_redist_reg_get(v.gic_fd, 0, GICR_TYPER, 0x0, "read typer of rdist #0");496	v3_redist_reg_get(v.gic_fd, 3, GICR_TYPER, 0x310, "read typer of rdist #1");497 498	addr = REDIST_REGION_ATTR_ADDR(10, 0x100000, 0, 1);499	ret = __kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,500				    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);501	TEST_ASSERT(ret && errno == EINVAL, "collision with previous rdist region");502 503	v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100,504			  "no redist region attached to vcpu #1 yet, last cannot be returned");505	v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x200,506			  "no redist region attached to vcpu #2, last cannot be returned");507 508	addr = REDIST_REGION_ATTR_ADDR(10, 0x20000, 0, 1);509	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,510			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);511 512	v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100, "read typer of rdist #1");513	v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x210,514			  "read typer of rdist #1, last properly returned");515 516	vm_gic_destroy(&v);517}518 519static struct vm_gic vm_gic_v3_create_with_vcpuids(int nr_vcpus,520						   uint32_t vcpuids[])521{522	struct vm_gic v;523	int i;524 525	v.vm = vm_create(nr_vcpus);526	for (i = 0; i < nr_vcpus; i++)527		vm_vcpu_add(v.vm, vcpuids[i], guest_code);528 529	v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);530 531	return v;532}533 534/**535 * Test GICR_TYPER last bit with new redist regions536 * rdist regions #1 and #2 are contiguous537 * rdist region #0 @0x100000 2 rdist capacity538 *     rdists: 0, 3 (Last)539 * rdist region #1 @0x240000 2 rdist capacity540 *     rdists:  5, 4 (Last)541 * rdist region #2 @0x200000 2 rdist capacity542 *     rdists: 1, 2543 */544static void test_v3_last_bit_redist_regions(void)545{546	uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };547	struct vm_gic v;548	uint64_t addr;549 550	v = vm_gic_v3_create_with_vcpuids(ARRAY_SIZE(vcpuids), vcpuids);551 552	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,553			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);554 555	addr = REDIST_REGION_ATTR_ADDR(2, 0x100000, 0, 0);556	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,557			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);558 559	addr = REDIST_REGION_ATTR_ADDR(2, 0x240000, 0, 1);560	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,561			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);562 563	addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 2);564	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,565			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);566 567	v3_redist_reg_get(v.gic_fd, 0, GICR_TYPER, 0x000, "read typer of rdist #0");568	v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100, "read typer of rdist #1");569	v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x200, "read typer of rdist #2");570	v3_redist_reg_get(v.gic_fd, 3, GICR_TYPER, 0x310, "read typer of rdist #3");571	v3_redist_reg_get(v.gic_fd, 5, GICR_TYPER, 0x500, "read typer of rdist #5");572	v3_redist_reg_get(v.gic_fd, 4, GICR_TYPER, 0x410, "read typer of rdist #4");573 574	vm_gic_destroy(&v);575}576 577/* Test last bit with legacy region */578static void test_v3_last_bit_single_rdist(void)579{580	uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };581	struct vm_gic v;582	uint64_t addr;583 584	v = vm_gic_v3_create_with_vcpuids(ARRAY_SIZE(vcpuids), vcpuids);585 586	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,587			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);588 589	addr = 0x10000;590	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,591			    KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr);592 593	v3_redist_reg_get(v.gic_fd, 0, GICR_TYPER, 0x000, "read typer of rdist #0");594	v3_redist_reg_get(v.gic_fd, 3, GICR_TYPER, 0x300, "read typer of rdist #1");595	v3_redist_reg_get(v.gic_fd, 5, GICR_TYPER, 0x500, "read typer of rdist #2");596	v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, 0x100, "read typer of rdist #3");597	v3_redist_reg_get(v.gic_fd, 2, GICR_TYPER, 0x210, "read typer of rdist #3");598 599	vm_gic_destroy(&v);600}601 602/* Uses the legacy REDIST region API. */603static void test_v3_redist_ipa_range_check_at_vcpu_run(void)604{605	struct kvm_vcpu *vcpus[NR_VCPUS];606	struct vm_gic v;607	int ret, i;608	uint64_t addr;609 610	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, 1, vcpus);611 612	/* Set space for 3 redists, we have 1 vcpu, so this succeeds. */613	addr = max_phys_size - (3 * 2 * 0x10000);614	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,615			    KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr);616 617	addr = 0x00000;618	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,619			    KVM_VGIC_V3_ADDR_TYPE_DIST, &addr);620 621	/* Add the rest of the VCPUs */622	for (i = 1; i < NR_VCPUS; ++i)623		vcpus[i] = vm_vcpu_add(v.vm, i, guest_code);624 625	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,626			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);627 628	/* Attempt to run a vcpu without enough redist space. */629	ret = run_vcpu(vcpus[2]);630	TEST_ASSERT(ret && errno == EINVAL,631		"redist base+size above PA range detected on 1st vcpu run");632 633	vm_gic_destroy(&v);634}635 636static void test_v3_its_region(void)637{638	struct kvm_vcpu *vcpus[NR_VCPUS];639	struct vm_gic v;640	uint64_t addr;641	int its_fd, ret;642 643	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);644	its_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_ITS);645 646	addr = 0x401000;647	ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,648				    KVM_VGIC_ITS_ADDR_TYPE, &addr);649	TEST_ASSERT(ret && errno == EINVAL,650		"ITS region with misaligned address");651 652	addr = max_phys_size;653	ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,654				    KVM_VGIC_ITS_ADDR_TYPE, &addr);655	TEST_ASSERT(ret && errno == E2BIG,656		"register ITS region with base address beyond IPA range");657 658	addr = max_phys_size - 0x10000;659	ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,660				    KVM_VGIC_ITS_ADDR_TYPE, &addr);661	TEST_ASSERT(ret && errno == E2BIG,662		"Half of ITS region is beyond IPA range");663 664	/* This one succeeds setting the ITS base */665	addr = 0x400000;666	kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,667			    KVM_VGIC_ITS_ADDR_TYPE, &addr);668 669	addr = 0x300000;670	ret = __kvm_device_attr_set(its_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,671				    KVM_VGIC_ITS_ADDR_TYPE, &addr);672	TEST_ASSERT(ret && errno == EEXIST, "ITS base set again");673 674	close(its_fd);675	vm_gic_destroy(&v);676}677 678/*679 * Returns 0 if it's possible to create GIC device of a given type (V2 or V3).680 */681int test_kvm_device(uint32_t gic_dev_type)682{683	struct kvm_vcpu *vcpus[NR_VCPUS];684	struct vm_gic v;685	uint32_t other;686	int ret;687 688	v.vm = vm_create_with_vcpus(NR_VCPUS, guest_code, vcpus);689 690	/* try to create a non existing KVM device */691	ret = __kvm_test_create_device(v.vm, 0);692	TEST_ASSERT(ret && errno == ENODEV, "unsupported device");693 694	/* trial mode */695	ret = __kvm_test_create_device(v.vm, gic_dev_type);696	if (ret)697		return ret;698	v.gic_fd = kvm_create_device(v.vm, gic_dev_type);699 700	ret = __kvm_create_device(v.vm, gic_dev_type);701	TEST_ASSERT(ret < 0 && errno == EEXIST, "create GIC device twice");702 703	/* try to create the other gic_dev_type */704	other = VGIC_DEV_IS_V2(gic_dev_type) ? KVM_DEV_TYPE_ARM_VGIC_V3705					     : KVM_DEV_TYPE_ARM_VGIC_V2;706 707	if (!__kvm_test_create_device(v.vm, other)) {708		ret = __kvm_create_device(v.vm, other);709		TEST_ASSERT(ret < 0 && (errno == EINVAL || errno == EEXIST),710				"create GIC device while other version exists");711	}712 713	vm_gic_destroy(&v);714 715	return 0;716}717 718void run_tests(uint32_t gic_dev_type)719{720	test_vcpus_then_vgic(gic_dev_type);721	test_vgic_then_vcpus(gic_dev_type);722 723	if (VGIC_DEV_IS_V2(gic_dev_type))724		test_v2_uaccess_cpuif_no_vcpus();725 726	if (VGIC_DEV_IS_V3(gic_dev_type)) {727		test_v3_new_redist_regions();728		test_v3_typer_accesses();729		test_v3_last_bit_redist_regions();730		test_v3_last_bit_single_rdist();731		test_v3_redist_ipa_range_check_at_vcpu_run();732		test_v3_its_region();733	}734}735 736int main(int ac, char **av)737{738	int ret;739	int pa_bits;740	int cnt_impl = 0;741 742	pa_bits = vm_guest_mode_params[VM_MODE_DEFAULT].pa_bits;743	max_phys_size = 1ULL << pa_bits;744 745	ret = test_kvm_device(KVM_DEV_TYPE_ARM_VGIC_V3);746	if (!ret) {747		pr_info("Running GIC_v3 tests.\n");748		run_tests(KVM_DEV_TYPE_ARM_VGIC_V3);749		cnt_impl++;750	}751 752	ret = test_kvm_device(KVM_DEV_TYPE_ARM_VGIC_V2);753	if (!ret) {754		pr_info("Running GIC_v2 tests.\n");755		run_tests(KVM_DEV_TYPE_ARM_VGIC_V2);756		cnt_impl++;757	}758 759	if (!cnt_impl) {760		print_skip("No GICv2 nor GICv3 support");761		exit(KSFT_SKIP);762	}763	return 0;764}765