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-rw-r--r--tools/testing/selftests/kvm/Makefile2
-rw-r--r--tools/testing/selftests/kvm/lib/kvm_util.c141
-rw-r--r--tools/testing/selftests/kvm/lib/kvm_util_internal.h15
-rw-r--r--tools/testing/selftests/kvm/lib/rbtree.c1
4 files changed, 124 insertions, 35 deletions
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index e439d027939d..a8c30f888d40 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -33,7 +33,7 @@ ifeq ($(ARCH),s390)
UNAME_M := s390x
endif
-LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c
+LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c
LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S
LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c
LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 12d953d8ee35..1255744758e3 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -203,7 +203,9 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
TEST_ASSERT(vm != NULL, "Insufficient Memory");
INIT_LIST_HEAD(&vm->vcpus);
- INIT_LIST_HEAD(&vm->userspace_mem_regions);
+ vm->regions.gpa_tree = RB_ROOT;
+ vm->regions.hva_tree = RB_ROOT;
+ hash_init(vm->regions.slot_hash);
vm->mode = mode;
vm->type = 0;
@@ -355,13 +357,14 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
*/
void kvm_vm_restart(struct kvm_vm *vmp, int perm)
{
+ int ctr;
struct userspace_mem_region *region;
vm_open(vmp, perm);
if (vmp->has_irqchip)
vm_create_irqchip(vmp);
- list_for_each_entry(region, &vmp->userspace_mem_regions, list) {
+ hash_for_each(vmp->regions.slot_hash, ctr, region, slot_node) {
int ret = ioctl(vmp->fd, KVM_SET_USER_MEMORY_REGION, &region->region);
TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION IOCTL failed,\n"
" rc: %i errno: %i\n"
@@ -424,14 +427,21 @@ uint32_t kvm_vm_reset_dirty_ring(struct kvm_vm *vm)
static struct userspace_mem_region *
userspace_mem_region_find(struct kvm_vm *vm, uint64_t start, uint64_t end)
{
- struct userspace_mem_region *region;
+ struct rb_node *node;
- list_for_each_entry(region, &vm->userspace_mem_regions, list) {
+ for (node = vm->regions.gpa_tree.rb_node; node; ) {
+ struct userspace_mem_region *region =
+ container_of(node, struct userspace_mem_region, gpa_node);
uint64_t existing_start = region->region.guest_phys_addr;
uint64_t existing_end = region->region.guest_phys_addr
+ region->region.memory_size - 1;
if (start <= existing_end && end >= existing_start)
return region;
+
+ if (start < existing_start)
+ node = node->rb_left;
+ else
+ node = node->rb_right;
}
return NULL;
@@ -546,11 +556,16 @@ void kvm_vm_release(struct kvm_vm *vmp)
}
static void __vm_mem_region_delete(struct kvm_vm *vm,
- struct userspace_mem_region *region)
+ struct userspace_mem_region *region,
+ bool unlink)
{
int ret;
- list_del(&region->list);
+ if (unlink) {
+ rb_erase(&region->gpa_node, &vm->regions.gpa_tree);
+ rb_erase(&region->hva_node, &vm->regions.hva_tree);
+ hash_del(&region->slot_node);
+ }
region->region.memory_size = 0;
ret = ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION, &region->region);
@@ -569,14 +584,16 @@ static void __vm_mem_region_delete(struct kvm_vm *vm,
*/
void kvm_vm_free(struct kvm_vm *vmp)
{
- struct userspace_mem_region *region, *tmp;
+ int ctr;
+ struct hlist_node *node;
+ struct userspace_mem_region *region;
if (vmp == NULL)
return;
/* Free userspace_mem_regions. */
- list_for_each_entry_safe(region, tmp, &vmp->userspace_mem_regions, list)
- __vm_mem_region_delete(vmp, region);
+ hash_for_each_safe(vmp->regions.slot_hash, ctr, node, region, slot_node)
+ __vm_mem_region_delete(vmp, region, false);
/* Free sparsebit arrays. */
sparsebit_free(&vmp->vpages_valid);
@@ -658,6 +675,57 @@ int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, vm_vaddr_t gva, size_t len)
return 0;
}
+static void vm_userspace_mem_region_gpa_insert(struct rb_root *gpa_tree,
+ struct userspace_mem_region *region)
+{
+ struct rb_node **cur, *parent;
+
+ for (cur = &gpa_tree->rb_node, parent = NULL; *cur; ) {
+ struct userspace_mem_region *cregion;
+
+ cregion = container_of(*cur, typeof(*cregion), gpa_node);
+ parent = *cur;
+ if (region->region.guest_phys_addr <
+ cregion->region.guest_phys_addr)
+ cur = &(*cur)->rb_left;
+ else {
+ TEST_ASSERT(region->region.guest_phys_addr !=
+ cregion->region.guest_phys_addr,
+ "Duplicate GPA in region tree");
+
+ cur = &(*cur)->rb_right;
+ }
+ }
+
+ rb_link_node(&region->gpa_node, parent, cur);
+ rb_insert_color(&region->gpa_node, gpa_tree);
+}
+
+static void vm_userspace_mem_region_hva_insert(struct rb_root *hva_tree,
+ struct userspace_mem_region *region)
+{
+ struct rb_node **cur, *parent;
+
+ for (cur = &hva_tree->rb_node, parent = NULL; *cur; ) {
+ struct userspace_mem_region *cregion;
+
+ cregion = container_of(*cur, typeof(*cregion), hva_node);
+ parent = *cur;
+ if (region->host_mem < cregion->host_mem)
+ cur = &(*cur)->rb_left;
+ else {
+ TEST_ASSERT(region->host_mem !=
+ cregion->host_mem,
+ "Duplicate HVA in region tree");
+
+ cur = &(*cur)->rb_right;
+ }
+ }
+
+ rb_link_node(&region->hva_node, parent, cur);
+ rb_insert_color(&region->hva_node, hva_tree);
+}
+
/*
* VM Userspace Memory Region Add
*
@@ -722,7 +790,8 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
(uint64_t) region->region.memory_size);
/* Confirm no region with the requested slot already exists. */
- list_for_each_entry(region, &vm->userspace_mem_regions, list) {
+ hash_for_each_possible(vm->regions.slot_hash, region, slot_node,
+ slot) {
if (region->region.slot != slot)
continue;
@@ -793,8 +862,10 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
ret, errno, slot, flags,
guest_paddr, (uint64_t) region->region.memory_size);
- /* Add to linked-list of memory regions. */
- list_add(&region->list, &vm->userspace_mem_regions);
+ /* Add to quick lookup data structures */
+ vm_userspace_mem_region_gpa_insert(&vm->regions.gpa_tree, region);
+ vm_userspace_mem_region_hva_insert(&vm->regions.hva_tree, region);
+ hash_add(vm->regions.slot_hash, &region->slot_node, slot);
}
/*
@@ -817,10 +888,10 @@ memslot2region(struct kvm_vm *vm, uint32_t memslot)
{
struct userspace_mem_region *region;
- list_for_each_entry(region, &vm->userspace_mem_regions, list) {
+ hash_for_each_possible(vm->regions.slot_hash, region, slot_node,
+ memslot)
if (region->region.slot == memslot)
return region;
- }
fprintf(stderr, "No mem region with the requested slot found,\n"
" requested slot: %u\n", memslot);
@@ -905,7 +976,7 @@ void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa)
*/
void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot)
{
- __vm_mem_region_delete(vm, memslot2region(vm, slot));
+ __vm_mem_region_delete(vm, memslot2region(vm, slot), true);
}
/*
@@ -1176,16 +1247,14 @@ void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa)
{
struct userspace_mem_region *region;
- list_for_each_entry(region, &vm->userspace_mem_regions, list) {
- if ((gpa >= region->region.guest_phys_addr)
- && (gpa <= (region->region.guest_phys_addr
- + region->region.memory_size - 1)))
- return (void *) ((uintptr_t) region->host_mem
- + (gpa - region->region.guest_phys_addr));
+ region = userspace_mem_region_find(vm, gpa, gpa);
+ if (!region) {
+ TEST_FAIL("No vm physical memory at 0x%lx", gpa);
+ return NULL;
}
- TEST_FAIL("No vm physical memory at 0x%lx", gpa);
- return NULL;
+ return (void *)((uintptr_t)region->host_mem
+ + (gpa - region->region.guest_phys_addr));
}
/*
@@ -1207,15 +1276,22 @@ void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa)
*/
vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva)
{
- struct userspace_mem_region *region;
+ struct rb_node *node;
+
+ for (node = vm->regions.hva_tree.rb_node; node; ) {
+ struct userspace_mem_region *region =
+ container_of(node, struct userspace_mem_region, hva_node);
+
+ if (hva >= region->host_mem) {
+ if (hva <= (region->host_mem
+ + region->region.memory_size - 1))
+ return (vm_paddr_t)((uintptr_t)
+ region->region.guest_phys_addr
+ + (hva - (uintptr_t)region->host_mem));
- list_for_each_entry(region, &vm->userspace_mem_regions, list) {
- if ((hva >= region->host_mem)
- && (hva <= (region->host_mem
- + region->region.memory_size - 1)))
- return (vm_paddr_t) ((uintptr_t)
- region->region.guest_phys_addr
- + (hva - (uintptr_t) region->host_mem));
+ node = node->rb_right;
+ } else
+ node = node->rb_left;
}
TEST_FAIL("No mapping to a guest physical address, hva: %p", hva);
@@ -1821,6 +1897,7 @@ int kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
*/
void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent)
{
+ int ctr;
struct userspace_mem_region *region;
struct vcpu *vcpu;
@@ -1828,7 +1905,7 @@ void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent)
fprintf(stream, "%*sfd: %i\n", indent, "", vm->fd);
fprintf(stream, "%*spage_size: 0x%x\n", indent, "", vm->page_size);
fprintf(stream, "%*sMem Regions:\n", indent, "");
- list_for_each_entry(region, &vm->userspace_mem_regions, list) {
+ hash_for_each(vm->regions.slot_hash, ctr, region, slot_node) {
fprintf(stream, "%*sguest_phys: 0x%lx size: 0x%lx "
"host_virt: %p\n", indent + 2, "",
(uint64_t) region->region.guest_phys_addr,
diff --git a/tools/testing/selftests/kvm/lib/kvm_util_internal.h b/tools/testing/selftests/kvm/lib/kvm_util_internal.h
index 91ce1b5d480b..b30e8c7b119b 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util_internal.h
+++ b/tools/testing/selftests/kvm/lib/kvm_util_internal.h
@@ -8,6 +8,9 @@
#ifndef SELFTEST_KVM_UTIL_INTERNAL_H
#define SELFTEST_KVM_UTIL_INTERNAL_H
+#include "linux/hashtable.h"
+#include "linux/rbtree.h"
+
#include "sparsebit.h"
struct userspace_mem_region {
@@ -18,7 +21,9 @@ struct userspace_mem_region {
void *host_mem;
void *mmap_start;
size_t mmap_size;
- struct list_head list;
+ struct rb_node gpa_node;
+ struct rb_node hva_node;
+ struct hlist_node slot_node;
};
struct vcpu {
@@ -31,6 +36,12 @@ struct vcpu {
uint32_t dirty_gfns_count;
};
+struct userspace_mem_regions {
+ struct rb_root gpa_tree;
+ struct rb_root hva_tree;
+ DECLARE_HASHTABLE(slot_hash, 9);
+};
+
struct kvm_vm {
int mode;
unsigned long type;
@@ -43,7 +54,7 @@ struct kvm_vm {
unsigned int va_bits;
uint64_t max_gfn;
struct list_head vcpus;
- struct list_head userspace_mem_regions;
+ struct userspace_mem_regions regions;
struct sparsebit *vpages_valid;
struct sparsebit *vpages_mapped;
bool has_irqchip;
diff --git a/tools/testing/selftests/kvm/lib/rbtree.c b/tools/testing/selftests/kvm/lib/rbtree.c
new file mode 100644
index 000000000000..a703f0194ea3
--- /dev/null
+++ b/tools/testing/selftests/kvm/lib/rbtree.c
@@ -0,0 +1 @@
+#include "../../../../lib/rbtree.c"
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 19:31:46 +0000