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KVM: selftests: aarch64/vgic-v3 init sequence tests

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The tests exercise the VGIC_V3 device creation including the
associated KVM_DEV_ARM_VGIC_GRP_ADDR group attributes:

- KVM_VGIC_V3_ADDR_TYPE_DIST/REDIST
- KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION

Some other tests dedicate to KVM_DEV_ARM_VGIC_GRP_REDIST_REGS group
and especially the GICR_TYPER read. The goal was to test the case
recently fixed by commit 23bde34771f1
("KVM: arm64: vgic-v3: Drop the reporting of GICR_TYPER.Last for userspace").

The API under test can be found at
Documentation/virt/kvm/devices/arm-vgic-v3.rst

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210405163941.510258-10-eric.auger@redhat.com
This commit is contained in:
Eric Auger 2021-04-05 18:39:41 +02:00 committed by Marc Zyngier
parent 28e9d4bce3
commit dc0e058eef
5 changed files with 672 additions and 0 deletions
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1
tools/testing/selftests/kvm/.gitignore vendored
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@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
/aarch64/get-reg-list
/aarch64/get-reg-list-sve
/aarch64/vgic_init
/s390x/memop
/s390x/resets
/s390x/sync_regs_test

1
tools/testing/selftests/kvm/Makefile
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@ -75,6 +75,7 @@ TEST_GEN_PROGS_x86_64 += steal_time
TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list
TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list-sve
TEST_GEN_PROGS_aarch64 += aarch64/vgic_init
TEST_GEN_PROGS_aarch64 += demand_paging_test
TEST_GEN_PROGS_aarch64 += dirty_log_test
TEST_GEN_PROGS_aarch64 += dirty_log_perf_test

584
tools/testing/selftests/kvm/aarch64/vgic_init.c Normal file
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@ -0,0 +1,584 @@
// 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"
#define NR_VCPUS 4
#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) (((uint64_t)(count) << 52) | \
((uint64_t)((base) >> 16) << 16) | ((uint64_t)(flags) << 12) | index)
#define REG_OFFSET(vcpu, offset) (((uint64_t)vcpu << 32) | offset)
#define GICR_TYPER 0x8
struct vm_gic {
struct kvm_vm *vm;
int gic_fd;
};
int max_ipa_bits;
/* helper to access a redistributor register */
static int access_redist_reg(int gicv3_fd, int vcpu, int offset,
uint32_t *val, bool write)
{
uint64_t attr = REG_OFFSET(vcpu, offset);
return _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS,
attr, val, write);
}
/* 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_vm *vm, uint32_t vcpuid)
{
int ret;
vcpu_args_set(vm, vcpuid, 1);
ret = _vcpu_ioctl(vm, vcpuid, KVM_RUN, NULL);
get_ucall(vm, vcpuid, NULL);
if (ret)
return -errno;
return 0;
}
static struct vm_gic vm_gic_create(void)
{
struct vm_gic v;
v.vm = vm_create_default_with_vcpus(NR_VCPUS, 0, 0, guest_code, NULL);
v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
TEST_ASSERT(v.gic_fd > 0, "GICv3 device created");
return v;
}
static void vm_gic_destroy(struct vm_gic *v)
{
close(v->gic_fd);
kvm_vm_free(v->vm);
}
/**
* 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
*/
static void subtest_dist_rdist(struct vm_gic *v)
{
int ret;
uint64_t addr;
/* Check existing group/attributes */
ret = _kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST);
TEST_ASSERT(!ret, "KVM_DEV_ARM_VGIC_GRP_ADDR/KVM_VGIC_V3_ADDR_TYPE_DIST supported");
ret = _kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST);
TEST_ASSERT(!ret, "KVM_DEV_ARM_VGIC_GRP_ADDR/KVM_VGIC_V3_ADDR_TYPE_REDIST supported");
/* check non existing attribute */
ret = _kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, 0);
TEST_ASSERT(ret == -ENXIO, "attribute not supported");
/* misaligned DIST and REDIST address settings */
addr = 0x1000;
ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
TEST_ASSERT(ret == -EINVAL, "GICv3 dist base not 64kB aligned");
ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
TEST_ASSERT(ret == -EINVAL, "GICv3 redist base not 64kB 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);
TEST_ASSERT(ret == -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);
TEST_ASSERT(ret == -E2BIG, "redist address beyond IPA limit");
}
/* set REDIST base address @0x0*/
addr = 0x00000;
ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
TEST_ASSERT(!ret, "GICv3 redist base set");
/* 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 == -EEXIST, "GICv3 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 == -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;
ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V3_ADDR_TYPE_DIST,
&addr, true);
TEST_ASSERT(!ret, "dist overlapping rdist");
}
/* Test the new REDIST region API */
static void subtest_redist_regions(struct vm_gic *v)
{
uint64_t addr, expected_addr;
int ret;
ret = kvm_device_check_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_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(ret == -EINVAL, "redist region attr value with flags != 0");
addr = REDIST_REGION_ATTR_ADDR(0, 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 == -EINVAL, "redist region attr value with count== 0");
addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);
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 == -EINVAL, "attempt to register the first rdist region with index != 0");
addr = REDIST_REGION_ATTR_ADDR(2, 0x201000, 0, 1);
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 == -EINVAL, "rdist region with misaligned address");
addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 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, "First valid redist region with 2 rdist @ 0x200000, index 0");
addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);
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 == -EINVAL, "register an rdist region with already used index");
addr = REDIST_REGION_ATTR_ADDR(1, 0x210000, 0, 2);
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 == -EINVAL, "register an rdist region overlapping with another one");
addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 2);
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 == -EINVAL, "register redist region with index not +1");
addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);
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, "register valid redist region with 1 rdist @ 0x220000, index 1");
addr = REDIST_REGION_ATTR_ADDR(1, 1ULL << max_ipa_bits, 0, 2);
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 == -E2BIG, "register redist region with base address beyond IPA range");
addr = 0x260000;
ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
TEST_ASSERT(ret == -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_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, false);
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_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, false);
TEST_ASSERT(!ret && addr == expected_addr, "read characteristics of region #1");
addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 2);
ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, false);
TEST_ASSERT(ret == -ENOENT, "read characteristics of non existing region");
addr = 0x260000;
ret = _kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
TEST_ASSERT(!ret, "set dist region");
addr = REDIST_REGION_ATTR_ADDR(1, 0x260000, 0, 2);
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 == -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(void)
{
struct vm_gic v;
int ret, i;
v.vm = vm_create_default(0, 0, guest_code);
v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
TEST_ASSERT(v.gic_fd > 0, "GICv3 device created");
subtest_dist_rdist(&v);
/* Add the rest of the VCPUs */
for (i = 1; i < NR_VCPUS; ++i)
vm_vcpu_add_default(v.vm, i, guest_code);
ucall_init(v.vm, NULL);
ret = run_vcpu(v.vm, 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(void)
{
struct vm_gic v;
int ret;
v = vm_gic_create();
subtest_dist_rdist(&v);
ucall_init(v.vm, NULL);
ret = run_vcpu(v.vm, 3);
TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
vm_gic_destroy(&v);
}
static void test_new_redist_regions(void)
{
void *dummy = NULL;
struct vm_gic v;
uint64_t addr;
int ret;
v = vm_gic_create();
subtest_redist_regions(&v);
ret = _kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
TEST_ASSERT(!ret, "init the vgic");
ucall_init(v.vm, NULL);
ret = run_vcpu(v.vm, 3);
TEST_ASSERT(ret == -ENXIO, "running without sufficient number of rdists");
vm_gic_destroy(&v);
/* step2 */
v = vm_gic_create();
subtest_redist_regions(&v);
addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);
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, "register a third region allowing to cover the 4 vcpus");
ucall_init(v.vm, NULL);
ret = run_vcpu(v.vm, 3);
TEST_ASSERT(ret == -EBUSY, "running without vgic explicit init");
vm_gic_destroy(&v);
/* step 3 */
v = vm_gic_create();
subtest_redist_regions(&v);
ret = _kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, dummy, true);
TEST_ASSERT(ret == -EFAULT, "register a third region allowing to cover the 4 vcpus");
addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);
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, "register a third region allowing to cover the 4 vcpus");
ret = _kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
TEST_ASSERT(!ret, "init the vgic");
ucall_init(v.vm, NULL);
ret = run_vcpu(v.vm, 3);
TEST_ASSERT(!ret, "vcpu run");
vm_gic_destroy(&v);
}
static void test_typer_accesses(void)
{
int ret, i, gicv3_fd = -1;
uint64_t addr;
struct kvm_vm *vm;
uint32_t val;
vm = vm_create_default(0, 0, guest_code);
gicv3_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
TEST_ASSERT(gicv3_fd >= 0, "VGIC_V3 device created");
vm_vcpu_add_default(vm, 3, guest_code);
ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(ret == -EINVAL, "attempting to read GICR_TYPER of non created vcpu");
vm_vcpu_add_default(vm, 1, guest_code);
ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(ret == -EBUSY, "read GICR_TYPER before GIC initialized");
vm_vcpu_add_default(vm, 2, guest_code);
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
TEST_ASSERT(!ret, "init the vgic after the vcpu creations");
for (i = 0; i < NR_VCPUS ; i++) {
ret = access_redist_reg(gicv3_fd, 0, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && !val, "read GICR_TYPER before rdist region setting");
}
addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(!ret, "first rdist region with a capacity of 2 rdists");
/* The 2 first rdists should be put there (vcpu 0 and 3) */
ret = access_redist_reg(gicv3_fd, 0, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && !val, "read typer of rdist #0");
ret = access_redist_reg(gicv3_fd, 3, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x310, "read typer of rdist #1");
addr = REDIST_REGION_ATTR_ADDR(10, 0x100000, 0, 1);
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(ret == -EINVAL, "collision with previous rdist region");
ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x100,
"no redist region attached to vcpu #1 yet, last cannot be returned");
ret = access_redist_reg(gicv3_fd, 2, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x200,
"no redist region attached to vcpu #2, last cannot be returned");
addr = REDIST_REGION_ATTR_ADDR(10, 0x20000, 0, 1);
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(!ret, "second rdist region");
ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x100, "read typer of rdist #1");
ret = access_redist_reg(gicv3_fd, 2, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x210,
"read typer of rdist #1, last properly returned");
close(gicv3_fd);
kvm_vm_free(vm);
}
/**
* 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_last_bit_redist_regions(void)
{
uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };
int ret, gicv3_fd;
uint64_t addr;
struct kvm_vm *vm;
uint32_t val;
vm = vm_create_default_with_vcpus(6, 0, 0, guest_code, vcpuids);
gicv3_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
TEST_ASSERT(gicv3_fd >= 0, "VGIC_V3 device created");
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
TEST_ASSERT(!ret, "init the vgic after the vcpu creations");
addr = REDIST_REGION_ATTR_ADDR(2, 0x100000, 0, 0);
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(!ret, "rdist region #0 (2 rdist)");
addr = REDIST_REGION_ATTR_ADDR(2, 0x240000, 0, 1);
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(!ret, "rdist region #1 (1 rdist) contiguous with #2");
addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 2);
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(!ret, "rdist region #2 with a capacity of 2 rdists");
ret = access_redist_reg(gicv3_fd, 0, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x000, "read typer of rdist #0");
ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x100, "read typer of rdist #1");
ret = access_redist_reg(gicv3_fd, 2, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x200, "read typer of rdist #2");
ret = access_redist_reg(gicv3_fd, 3, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x310, "read typer of rdist #3");
ret = access_redist_reg(gicv3_fd, 5, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x500, "read typer of rdist #5");
ret = access_redist_reg(gicv3_fd, 4, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x410, "read typer of rdist #4");
close(gicv3_fd);
kvm_vm_free(vm);
}
/* Test last bit with legacy region */
static void test_last_bit_single_rdist(void)
{
uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };
int ret, gicv3_fd;
uint64_t addr;
struct kvm_vm *vm;
uint32_t val;
vm = vm_create_default_with_vcpus(6, 0, 0, guest_code, vcpuids);
gicv3_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
TEST_ASSERT(gicv3_fd >= 0, "VGIC_V3 device created");
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
TEST_ASSERT(!ret, "init the vgic after the vcpu creations");
addr = 0x10000;
ret = _kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
ret = access_redist_reg(gicv3_fd, 0, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x000, "read typer of rdist #0");
ret = access_redist_reg(gicv3_fd, 3, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x300, "read typer of rdist #1");
ret = access_redist_reg(gicv3_fd, 5, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x500, "read typer of rdist #2");
ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x100, "read typer of rdist #3");
ret = access_redist_reg(gicv3_fd, 2, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x210, "read typer of rdist #3");
close(gicv3_fd);
kvm_vm_free(vm);
}
void test_kvm_device(void)
{
struct vm_gic v;
int ret;
v.vm = vm_create_default_with_vcpus(NR_VCPUS, 0, 0, guest_code, NULL);
/* try to create a non existing KVM device */
ret = _kvm_create_device(v.vm, 0, true);
TEST_ASSERT(ret == -ENODEV, "unsupported device");
/* trial mode with VGIC_V3 device */
ret = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, true);
if (ret) {
print_skip("GICv3 not supported");
exit(KSFT_SKIP);
}
v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
TEST_ASSERT(v.gic_fd, "create the GICv3 device");
ret = _kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
TEST_ASSERT(ret == -EEXIST, "create GICv3 device twice");
ret = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, true);
TEST_ASSERT(!ret, "create GICv3 in test mode while the same already is created");
if (!_kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V2, true)) {
ret = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V2, false);
TEST_ASSERT(ret == -EINVAL, "create GICv2 while v3 exists");
}
vm_gic_destroy(&v);
}
int main(int ac, char **av)
{
max_ipa_bits = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE);
test_kvm_device();
test_vcpus_then_vgic();
test_vgic_then_vcpus();
test_new_redist_regions();
test_typer_accesses();
test_last_bit_redist_regions();
test_last_bit_single_rdist();
return 0;
}

9
tools/testing/selftests/kvm/include/kvm_util.h
View File

@ -223,6 +223,15 @@ int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
#endif
void *vcpu_map_dirty_ring(struct kvm_vm *vm, uint32_t vcpuid);
int _kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr);
int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr);
int _kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test);
int kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test);
int _kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
void *val, bool write);
int kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
void *val, bool write);
const char *exit_reason_str(unsigned int exit_reason);
void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot);

77
tools/testing/selftests/kvm/lib/kvm_util.c
View File

@ -1728,6 +1728,83 @@ int _kvm_ioctl(struct kvm_vm *vm, unsigned long cmd, void *arg)
return ioctl(vm->kvm_fd, cmd, arg);
}
/*
* Device Ioctl
*/
int _kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr)
{
struct kvm_device_attr attribute = {
.group = group,
.attr = attr,
.flags = 0,
};
int ret = ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute);
if (ret == -1)
return -errno;
return 0;
}
int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr)
{
int ret = _kvm_device_check_attr(dev_fd, group, attr);
TEST_ASSERT(ret >= 0, "KVM_HAS_DEVICE_ATTR failed, errno: %i", errno);
return ret;
}
int _kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test)
{
struct kvm_create_device create_dev;
int ret;
create_dev.type = type;
create_dev.fd = -1;
create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
ret = ioctl(vm_get_fd(vm), KVM_CREATE_DEVICE, &create_dev);
if (ret == -1)
return -errno;
return test ? 0 : create_dev.fd;
}
int kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test)
{
int ret = _kvm_create_device(vm, type, test);
TEST_ASSERT(ret >= 0, "KVM_CREATE_DEVICE IOCTL failed,\n"
" errno: %i", errno);
return ret;
}
int _kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
void *val, bool write)
{
struct kvm_device_attr kvmattr = {
.group = group,
.attr = attr,
.flags = 0,
.addr = (uintptr_t)val,
};
int ret;
ret = ioctl(dev_fd, write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR,
&kvmattr);
if (ret < 0)
return -errno;
return ret;
}
int kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
void *val, bool write)
{
int ret = _kvm_device_access(dev_fd, group, attr, val, write);
TEST_ASSERT(ret >= 0, "KVM_SET|GET_DEVICE_ATTR IOCTL failed,\n"
" errno: %i", errno);
return ret;
}
/*
* VM Dump
*