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Merge branch 'kvm-arm64/vgic-5.13' into kvmarm-master/next

Browse Source 
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2021-04-13 15:41:33 +01:00
commit c90aad55c5
12 changed files with 712 additions and 51 deletions
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2
Documentation/virt/kvm/devices/arm-vgic-v3.rst
View File

@ -228,7 +228,7 @@ Groups:
KVM_DEV_ARM_VGIC_CTRL_INIT
request the initialization of the VGIC, no additional parameter in
kvm_device_attr.addr.
kvm_device_attr.addr. Must be called after all VCPUs have been created.
KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES
save all LPI pending bits into guest RAM pending tables.

12
arch/arm64/kvm/vgic/vgic-init.c
View File

@ -335,13 +335,14 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm)
kfree(dist->spis);
dist->spis = NULL;
dist->nr_spis = 0;
dist->vgic_dist_base = VGIC_ADDR_UNDEF;
if (kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) {
list_for_each_entry_safe(rdreg, next, &dist->rd_regions, list) {
list_del(&rdreg->list);
kfree(rdreg);
}
if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) {
list_for_each_entry_safe(rdreg, next, &dist->rd_regions, list)
vgic_v3_free_redist_region(rdreg);
INIT_LIST_HEAD(&dist->rd_regions);
} else {
dist->vgic_cpu_base = VGIC_ADDR_UNDEF;
}
if (vgic_has_its(kvm))
@ -362,6 +363,7 @@ void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu)
vgic_flush_pending_lpis(vcpu);
INIT_LIST_HEAD(&vgic_cpu->ap_list_head);
vgic_cpu->rd_iodev.base_addr = VGIC_ADDR_UNDEF;
}
/* To be called with kvm->lock held */

7
arch/arm64/kvm/vgic/vgic-kvm-device.c
View File

@ -87,8 +87,8 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
r = vgic_v3_set_redist_base(kvm, 0, *addr, 0);
goto out;
}
rdreg = list_first_entry(&vgic->rd_regions,
struct vgic_redist_region, list);
rdreg = list_first_entry_or_null(&vgic->rd_regions,
struct vgic_redist_region, list);
if (!rdreg)
addr_ptr = &undef_value;
else
@ -226,6 +226,9 @@ static int vgic_get_common_attr(struct kvm_device *dev,
u64 addr;
unsigned long type = (unsigned long)attr->attr;
if (copy_from_user(&addr, uaddr, sizeof(addr)))
return -EFAULT;
r = kvm_vgic_addr(dev->kvm, type, &addr, false);
if (r)
return (r == -ENODEV) ? -ENXIO : r;

93
arch/arm64/kvm/vgic/vgic-mmio-v3.c
View File

@ -251,45 +251,52 @@ static void vgic_mmio_write_v3r_ctlr(struct kvm_vcpu *vcpu,
vgic_enable_lpis(vcpu);
}
static bool vgic_mmio_vcpu_rdist_is_last(struct kvm_vcpu *vcpu)
{
struct vgic_dist *vgic = &vcpu->kvm->arch.vgic;
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_redist_region *iter, *rdreg = vgic_cpu->rdreg;
if (!rdreg)
return false;
if (vgic_cpu->rdreg_index < rdreg->free_index - 1) {
return false;
} else if (rdreg->count && vgic_cpu->rdreg_index == (rdreg->count - 1)) {
struct list_head *rd_regions = &vgic->rd_regions;
gpa_t end = rdreg->base + rdreg->count * KVM_VGIC_V3_REDIST_SIZE;
/*
* the rdist is the last one of the redist region,
* check whether there is no other contiguous rdist region
*/
list_for_each_entry(iter, rd_regions, list) {
if (iter->base == end && iter->free_index > 0)
return false;
}
}
return true;
}
static unsigned long vgic_mmio_read_v3r_typer(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
unsigned long mpidr = kvm_vcpu_get_mpidr_aff(vcpu);
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_redist_region *rdreg = vgic_cpu->rdreg;
int target_vcpu_id = vcpu->vcpu_id;
gpa_t last_rdist_typer = rdreg->base + GICR_TYPER +
(rdreg->free_index - 1) * KVM_VGIC_V3_REDIST_SIZE;
u64 value;
value = (u64)(mpidr & GENMASK(23, 0)) << 32;
value |= ((target_vcpu_id & 0xffff) << 8);
if (addr == last_rdist_typer)
if (vgic_has_its(vcpu->kvm))
value |= GICR_TYPER_PLPIS;
if (vgic_mmio_vcpu_rdist_is_last(vcpu))
value |= GICR_TYPER_LAST;
if (vgic_has_its(vcpu->kvm))
value |= GICR_TYPER_PLPIS;
return extract_bytes(value, addr & 7, len);
}
static unsigned long vgic_uaccess_read_v3r_typer(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
unsigned long mpidr = kvm_vcpu_get_mpidr_aff(vcpu);
int target_vcpu_id = vcpu->vcpu_id;
u64 value;
value = (u64)(mpidr & GENMASK(23, 0)) << 32;
value |= ((target_vcpu_id & 0xffff) << 8);
if (vgic_has_its(vcpu->kvm))
value |= GICR_TYPER_PLPIS;
/* reporting of the Last bit is not supported for userspace */
return extract_bytes(value, addr & 7, len);
}
static unsigned long vgic_mmio_read_v3r_iidr(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
@ -612,7 +619,7 @@ static const struct vgic_register_region vgic_v3_rd_registers[] = {
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH_UACCESS(GICR_TYPER,
vgic_mmio_read_v3r_typer, vgic_mmio_write_wi,
vgic_uaccess_read_v3r_typer, vgic_mmio_uaccess_write_wi, 8,
NULL, vgic_mmio_uaccess_write_wi, 8,
VGIC_ACCESS_64bit | VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH(GICR_WAKER,
vgic_mmio_read_raz, vgic_mmio_write_wi, 4,
@ -714,6 +721,7 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu)
return -EINVAL;
vgic_cpu->rdreg = rdreg;
vgic_cpu->rdreg_index = rdreg->free_index;
rd_base = rdreg->base + rdreg->free_index * KVM_VGIC_V3_REDIST_SIZE;
@ -768,7 +776,7 @@ static int vgic_register_all_redist_iodevs(struct kvm *kvm)
}
/**
* vgic_v3_insert_redist_region - Insert a new redistributor region
* vgic_v3_alloc_redist_region - Allocate a new redistributor region
*
* Performs various checks before inserting the rdist region in the list.
* Those tests depend on whether the size of the rdist region is known
@ -782,8 +790,8 @@ static int vgic_register_all_redist_iodevs(struct kvm *kvm)
*
* Return 0 on success, < 0 otherwise
*/
static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index,
gpa_t base, uint32_t count)
static int vgic_v3_alloc_redist_region(struct kvm *kvm, uint32_t index,
gpa_t base, uint32_t count)
{
struct vgic_dist *d = &kvm->arch.vgic;
struct vgic_redist_region *rdreg;
@ -791,10 +799,6 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index,
size_t size = count * KVM_VGIC_V3_REDIST_SIZE;
int ret;
/* single rdist region already set ?*/
if (!count && !list_empty(rd_regions))
return -EINVAL;
/* cross the end of memory ? */
if (base + size < base)
return -EINVAL;
@ -805,11 +809,15 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index,
} else {
rdreg = list_last_entry(rd_regions,
struct vgic_redist_region, list);
if (index != rdreg->index + 1)
/* Don't mix single region and discrete redist regions */
if (!count && rdreg->count)
return -EINVAL;
/* Cannot add an explicitly sized regions after legacy region */
if (!rdreg->count)
if (!count)
return -EEXIST;
if (index != rdreg->index + 1)
return -EINVAL;
}
@ -848,11 +856,17 @@ free:
return ret;
}
void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg)
{
list_del(&rdreg->list);
kfree(rdreg);
}
int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count)
{
int ret;
ret = vgic_v3_insert_redist_region(kvm, index, addr, count);
ret = vgic_v3_alloc_redist_region(kvm, index, addr, count);
if (ret)
return ret;
@ -861,8 +875,13 @@ int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count)
* afterwards will register the iodevs when needed.
*/
ret = vgic_register_all_redist_iodevs(kvm);
if (ret)
if (ret) {
struct vgic_redist_region *rdreg;
rdreg = vgic_v3_rdist_region_from_index(kvm, index);
vgic_v3_free_redist_region(rdreg);
return ret;
}
return 0;
}

10
arch/arm64/kvm/vgic/vgic-mmio.c
View File

@ -938,10 +938,9 @@ vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
return region;
}
static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
gpa_t addr, u32 *val)
{
struct vgic_io_device *iodev = kvm_to_vgic_iodev(dev);
const struct vgic_register_region *region;
struct kvm_vcpu *r_vcpu;
@ -960,10 +959,9 @@ static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
return 0;
}
static int vgic_uaccess_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
static int vgic_uaccess_write(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
gpa_t addr, const u32 *val)
{
struct vgic_io_device *iodev = kvm_to_vgic_iodev(dev);
const struct vgic_register_region *region;
struct kvm_vcpu *r_vcpu;
@ -986,9 +984,9 @@ int vgic_uaccess(struct kvm_vcpu *vcpu, struct vgic_io_device *dev,
bool is_write, int offset, u32 *val)
{
if (is_write)
return vgic_uaccess_write(vcpu, &dev->dev, offset, val);
return vgic_uaccess_write(vcpu, dev, offset, val);
else
return vgic_uaccess_read(vcpu, &dev->dev, offset, val);
return vgic_uaccess_read(vcpu, dev, offset, val);
}
static int dispatch_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,

1
arch/arm64/kvm/vgic/vgic.h
View File

@ -293,6 +293,7 @@ vgic_v3_rd_region_size(struct kvm *kvm, struct vgic_redist_region *rdreg)
struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm,
u32 index);
void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg);
bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size);

1
include/kvm/arm_vgic.h
View File

@ -322,6 +322,7 @@ struct vgic_cpu {
*/
struct vgic_io_device rd_iodev;
struct vgic_redist_region *rdreg;
u32 rdreg_index;
/* Contains the attributes and gpa of the LPI pending tables. */
u64 pendbaser;

1
tools/testing/selftests/kvm/.gitignore vendored
View File

@ -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
View File

@ -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

551
tools/testing/selftests/kvm/aarch64/vgic_init.c Normal file
View File

@ -0,0 +1,551 @@
// 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;
};
static 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)
{
ucall_init(vm, NULL);
int ret = _vcpu_ioctl(vm, vcpuid, KVM_RUN, 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);
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 */
kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST);
kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST);
/* check non existing attribute */
ret = _kvm_device_check_attr(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, 0);
TEST_ASSERT(ret && errno == 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 && errno == 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 && errno == 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 && 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);
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);
/* 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");
/* 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);
}
/* 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 && errno == 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 && errno == 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 && errno == 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 && errno == EINVAL, "rdist region with misaligned address");
addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
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 && errno == 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 && errno == 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 && errno == EINVAL, "register redist region with index not +1");
addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);
kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
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 && errno == 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 && 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_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 && errno == ENOENT, "read characteristics of non existing region");
addr = 0x260000;
kvm_device_access(v->gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
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 && 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(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);
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);
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);
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);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
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);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
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);
_kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, dummy, true);
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_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
ret = run_vcpu(v.vm, 3);
TEST_ASSERT(!ret, "vcpu run");
vm_gic_destroy(&v);
}
static void test_typer_accesses(void)
{
struct vm_gic v;
uint64_t addr;
uint32_t val;
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);
vm_vcpu_add_default(v.vm, 3, guest_code);
ret = access_redist_reg(v.gic_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(ret && errno == EINVAL, "attempting to read GICR_TYPER of non created vcpu");
vm_vcpu_add_default(v.vm, 1, guest_code);
ret = access_redist_reg(v.gic_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(ret && errno == EBUSY, "read GICR_TYPER before GIC initialized");
vm_vcpu_add_default(v.vm, 2, guest_code);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
for (i = 0; i < NR_VCPUS ; i++) {
ret = access_redist_reg(v.gic_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);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
/* The 2 first rdists should be put there (vcpu 0 and 3) */
ret = access_redist_reg(v.gic_fd, 0, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && !val, "read typer of rdist #0");
ret = access_redist_reg(v.gic_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(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
TEST_ASSERT(ret && errno == EINVAL, "collision with previous rdist region");
ret = access_redist_reg(v.gic_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(v.gic_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);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
ret = access_redist_reg(v.gic_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x100, "read typer of rdist #1");
ret = access_redist_reg(v.gic_fd, 2, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x210,
"read typer of rdist #1, last properly returned");
vm_gic_destroy(&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_last_bit_redist_regions(void)
{
uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };
struct vm_gic v;
uint64_t addr;
uint32_t val;
int ret;
v.vm = vm_create_default_with_vcpus(6, 0, 0, guest_code, vcpuids);
v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
addr = REDIST_REGION_ATTR_ADDR(2, 0x100000, 0, 0);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
addr = REDIST_REGION_ATTR_ADDR(2, 0x240000, 0, 1);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 2);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
ret = access_redist_reg(v.gic_fd, 0, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x000, "read typer of rdist #0");
ret = access_redist_reg(v.gic_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x100, "read typer of rdist #1");
ret = access_redist_reg(v.gic_fd, 2, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x200, "read typer of rdist #2");
ret = access_redist_reg(v.gic_fd, 3, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x310, "read typer of rdist #3");
ret = access_redist_reg(v.gic_fd, 5, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x500, "read typer of rdist #5");
ret = access_redist_reg(v.gic_fd, 4, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x410, "read typer of rdist #4");
vm_gic_destroy(&v);
}
/* Test last bit with legacy region */
static void test_last_bit_single_rdist(void)
{
uint32_t vcpuids[] = { 0, 3, 5, 4, 1, 2 };
struct vm_gic v;
uint64_t addr;
uint32_t val;
int ret;
v.vm = vm_create_default_with_vcpus(6, 0, 0, guest_code, vcpuids);
v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
addr = 0x10000;
kvm_device_access(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
ret = access_redist_reg(v.gic_fd, 0, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x000, "read typer of rdist #0");
ret = access_redist_reg(v.gic_fd, 3, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x300, "read typer of rdist #1");
ret = access_redist_reg(v.gic_fd, 5, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x500, "read typer of rdist #2");
ret = access_redist_reg(v.gic_fd, 1, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x100, "read typer of rdist #3");
ret = access_redist_reg(v.gic_fd, 2, GICR_TYPER, &val, false);
TEST_ASSERT(!ret && val == 0x210, "read typer of rdist #3");
vm_gic_destroy(&v);
}
void test_kvm_device(void)
{
struct vm_gic v;
int ret, fd;
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, &fd);
TEST_ASSERT(ret && errno == ENODEV, "unsupported device");
/* trial mode with VGIC_V3 device */
ret = _kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, true, &fd);
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);
ret = _kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, false, &fd);
TEST_ASSERT(ret && errno == EEXIST, "create GICv3 device twice");
kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3, true);
if (!_kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V2, true, &fd)) {
ret = _kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V2, false, &fd);
TEST_ASSERT(ret && errno == 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 *fd);
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);

75
tools/testing/selftests/kvm/lib/kvm_util.c
View File

@ -1728,6 +1728,81 @@ 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,
};
return ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute);
}
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, rc: %i errno: %i", ret, errno);
return ret;
}
int _kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test, int *fd)
{
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);
*fd = create_dev.fd;
return ret;
}
int kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test)
{
int fd, ret;
ret = _kvm_create_device(vm, type, test, &fd);
if (!test) {
TEST_ASSERT(ret >= 0,
"KVM_CREATE_DEVICE IOCTL failed, rc: %i errno: %i", ret, errno);
return fd;
}
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);
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, rc: %i errno: %i", ret, errno);
return ret;
}
/*
* VM Dump
*