aboutsummaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/kvm/dirty_log_test.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/kvm/dirty_log_test.c')
-rw-r--r--tools/testing/selftests/kvm/dirty_log_test.c165
1 files changed, 108 insertions, 57 deletions
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index aeff95a91b15..4715cfba20dc 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -51,10 +51,17 @@ static uint64_t random_array[TEST_PAGES_PER_LOOP];
static uint64_t iteration;
/*
- * GPA offset of the testing memory slot. Must be bigger than
- * DEFAULT_GUEST_PHY_PAGES.
+ * Guest physical memory offset of the testing memory slot.
+ * This will be set to the topmost valid physical address minus
+ * the test memory size.
*/
-static uint64_t guest_test_mem = DEFAULT_GUEST_TEST_MEM;
+static uint64_t guest_test_phys_mem;
+
+/*
+ * Guest virtual memory offset of the testing memory slot.
+ * Must not conflict with identity mapped test code.
+ */
+static uint64_t guest_test_virt_mem = DEFAULT_GUEST_TEST_MEM;
/*
* Continuously write to the first 8 bytes of a random pages within
@@ -66,7 +73,7 @@ static void guest_code(void)
while (true) {
for (i = 0; i < TEST_PAGES_PER_LOOP; i++) {
- uint64_t addr = guest_test_mem;
+ uint64_t addr = guest_test_virt_mem;
addr += (READ_ONCE(random_array[i]) % guest_num_pages)
* guest_page_size;
addr &= ~(host_page_size - 1);
@@ -209,12 +216,14 @@ static void vm_dirty_log_verify(unsigned long *bmap)
}
static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid,
- uint64_t extra_mem_pages, void *guest_code)
+ uint64_t extra_mem_pages, void *guest_code,
+ unsigned long type)
{
struct kvm_vm *vm;
uint64_t extra_pg_pages = extra_mem_pages / 512 * 2;
- vm = vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
+ vm = _vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages,
+ O_RDWR, type);
kvm_vm_elf_load(vm, program_invocation_name, 0, 0);
#ifdef __x86_64__
vm_create_irqchip(vm);
@@ -224,13 +233,14 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid,
}
static void run_test(enum vm_guest_mode mode, unsigned long iterations,
- unsigned long interval, bool top_offset)
+ unsigned long interval, uint64_t phys_offset)
{
unsigned int guest_pa_bits, guest_page_shift;
pthread_t vcpu_thread;
struct kvm_vm *vm;
uint64_t max_gfn;
unsigned long *bmap;
+ unsigned long type = 0;
switch (mode) {
case VM_MODE_P52V48_4K:
@@ -241,6 +251,14 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
guest_pa_bits = 52;
guest_page_shift = 16;
break;
+ case VM_MODE_P48V48_4K:
+ guest_pa_bits = 48;
+ guest_page_shift = 12;
+ break;
+ case VM_MODE_P48V48_64K:
+ guest_pa_bits = 48;
+ guest_page_shift = 16;
+ break;
case VM_MODE_P40V48_4K:
guest_pa_bits = 40;
guest_page_shift = 12;
@@ -255,6 +273,19 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
DEBUG("Testing guest mode: %s\n", vm_guest_mode_string(mode));
+#ifdef __x86_64__
+ /*
+ * FIXME
+ * The x86_64 kvm selftests framework currently only supports a
+ * single PML4 which restricts the number of physical address
+ * bits we can change to 39.
+ */
+ guest_pa_bits = 39;
+#endif
+#ifdef __aarch64__
+ if (guest_pa_bits != 40)
+ type = KVM_VM_TYPE_ARM_IPA_SIZE(guest_pa_bits);
+#endif
max_gfn = (1ul << (guest_pa_bits - guest_page_shift)) - 1;
guest_page_size = (1ul << guest_page_shift);
/* 1G of guest page sized pages */
@@ -263,31 +294,41 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
host_num_pages = (guest_num_pages * guest_page_size) / host_page_size +
!!((guest_num_pages * guest_page_size) % host_page_size);
- if (top_offset) {
- guest_test_mem = (max_gfn - guest_num_pages) * guest_page_size;
- guest_test_mem &= ~(host_page_size - 1);
+ if (!phys_offset) {
+ guest_test_phys_mem = (max_gfn - guest_num_pages) * guest_page_size;
+ guest_test_phys_mem &= ~(host_page_size - 1);
+ } else {
+ guest_test_phys_mem = phys_offset;
}
- DEBUG("guest test mem offset: 0x%lx\n", guest_test_mem);
+ DEBUG("guest physical test memory offset: 0x%lx\n", guest_test_phys_mem);
bmap = bitmap_alloc(host_num_pages);
host_bmap_track = bitmap_alloc(host_num_pages);
- vm = create_vm(mode, VCPU_ID, guest_num_pages, guest_code);
+ vm = create_vm(mode, VCPU_ID, guest_num_pages, guest_code, type);
+
+#ifdef USE_CLEAR_DIRTY_LOG
+ struct kvm_enable_cap cap = {};
+
+ cap.cap = KVM_CAP_MANUAL_DIRTY_LOG_PROTECT;
+ cap.args[0] = 1;
+ vm_enable_cap(vm, &cap);
+#endif
/* Add an extra memory slot for testing dirty logging */
vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
- guest_test_mem,
+ guest_test_phys_mem,
TEST_MEM_SLOT_INDEX,
guest_num_pages,
KVM_MEM_LOG_DIRTY_PAGES);
- /* Do 1:1 mapping for the dirty track memory slot */
- virt_map(vm, guest_test_mem, guest_test_mem,
+ /* Do mapping for the dirty track memory slot */
+ virt_map(vm, guest_test_virt_mem, guest_test_phys_mem,
guest_num_pages * guest_page_size, 0);
/* Cache the HVA pointer of the region */
- host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)guest_test_mem);
+ host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)guest_test_phys_mem);
#ifdef __x86_64__
vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
@@ -299,7 +340,7 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
/* Export the shared variables to the guest */
sync_global_to_guest(vm, host_page_size);
sync_global_to_guest(vm, guest_page_size);
- sync_global_to_guest(vm, guest_test_mem);
+ sync_global_to_guest(vm, guest_test_virt_mem);
sync_global_to_guest(vm, guest_num_pages);
/* Start the iterations */
@@ -316,6 +357,10 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
/* Give the vcpu thread some time to dirty some pages */
usleep(interval * 1000);
kvm_vm_get_dirty_log(vm, TEST_MEM_SLOT_INDEX, bmap);
+#ifdef USE_CLEAR_DIRTY_LOG
+ kvm_vm_clear_dirty_log(vm, TEST_MEM_SLOT_INDEX, bmap, 0,
+ DIV_ROUND_UP(host_num_pages, 64) * 64);
+#endif
vm_dirty_log_verify(bmap);
iteration++;
sync_global_to_guest(vm, iteration);
@@ -335,23 +380,16 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
kvm_vm_free(vm);
}
-static struct vm_guest_modes {
- enum vm_guest_mode mode;
+struct vm_guest_mode_params {
bool supported;
bool enabled;
-} vm_guest_modes[NUM_VM_MODES] = {
-#if defined(__x86_64__)
- { VM_MODE_P52V48_4K, 1, 1, },
- { VM_MODE_P52V48_64K, 0, 0, },
- { VM_MODE_P40V48_4K, 0, 0, },
- { VM_MODE_P40V48_64K, 0, 0, },
-#elif defined(__aarch64__)
- { VM_MODE_P52V48_4K, 0, 0, },
- { VM_MODE_P52V48_64K, 0, 0, },
- { VM_MODE_P40V48_4K, 1, 1, },
- { VM_MODE_P40V48_64K, 1, 1, },
-#endif
};
+struct vm_guest_mode_params vm_guest_mode_params[NUM_VM_MODES];
+
+#define vm_guest_mode_params_init(mode, supported, enabled) \
+({ \
+ vm_guest_mode_params[mode] = (struct vm_guest_mode_params){ supported, enabled }; \
+})
static void help(char *name)
{
@@ -359,25 +397,21 @@ static void help(char *name)
puts("");
printf("usage: %s [-h] [-i iterations] [-I interval] "
- "[-o offset] [-t] [-m mode]\n", name);
+ "[-p offset] [-m mode]\n", name);
puts("");
printf(" -i: specify iteration counts (default: %"PRIu64")\n",
TEST_HOST_LOOP_N);
printf(" -I: specify interval in ms (default: %"PRIu64" ms)\n",
TEST_HOST_LOOP_INTERVAL);
- printf(" -o: guest test memory offset (default: 0x%lx)\n",
- DEFAULT_GUEST_TEST_MEM);
- printf(" -t: map guest test memory at the top of the allowed "
- "physical address range\n");
+ printf(" -p: specify guest physical test memory offset\n"
+ " Warning: a low offset can conflict with the loaded test code.\n");
printf(" -m: specify the guest mode ID to test "
"(default: test all supported modes)\n"
" This option may be used multiple times.\n"
" Guest mode IDs:\n");
for (i = 0; i < NUM_VM_MODES; ++i) {
- printf(" %d: %s%s\n",
- vm_guest_modes[i].mode,
- vm_guest_mode_string(vm_guest_modes[i].mode),
- vm_guest_modes[i].supported ? " (supported)" : "");
+ printf(" %d: %s%s\n", i, vm_guest_mode_string(i),
+ vm_guest_mode_params[i].supported ? " (supported)" : "");
}
puts("");
exit(0);
@@ -388,11 +422,34 @@ int main(int argc, char *argv[])
unsigned long iterations = TEST_HOST_LOOP_N;
unsigned long interval = TEST_HOST_LOOP_INTERVAL;
bool mode_selected = false;
- bool top_offset = false;
- unsigned int mode;
+ uint64_t phys_offset = 0;
+ unsigned int mode, host_ipa_limit;
int opt, i;
- while ((opt = getopt(argc, argv, "hi:I:o:tm:")) != -1) {
+#ifdef USE_CLEAR_DIRTY_LOG
+ if (!kvm_check_cap(KVM_CAP_MANUAL_DIRTY_LOG_PROTECT)) {
+ fprintf(stderr, "KVM_CLEAR_DIRTY_LOG not available, skipping tests\n");
+ exit(KSFT_SKIP);
+ }
+#endif
+
+#ifdef __x86_64__
+ vm_guest_mode_params_init(VM_MODE_P52V48_4K, true, true);
+#endif
+#ifdef __aarch64__
+ vm_guest_mode_params_init(VM_MODE_P40V48_4K, true, true);
+ vm_guest_mode_params_init(VM_MODE_P40V48_64K, true, true);
+
+ host_ipa_limit = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE);
+ if (host_ipa_limit >= 52)
+ vm_guest_mode_params_init(VM_MODE_P52V48_64K, true, true);
+ if (host_ipa_limit >= 48) {
+ vm_guest_mode_params_init(VM_MODE_P48V48_4K, true, true);
+ vm_guest_mode_params_init(VM_MODE_P48V48_64K, true, true);
+ }
+#endif
+
+ while ((opt = getopt(argc, argv, "hi:I:p:m:")) != -1) {
switch (opt) {
case 'i':
iterations = strtol(optarg, NULL, 10);
@@ -400,22 +457,19 @@ int main(int argc, char *argv[])
case 'I':
interval = strtol(optarg, NULL, 10);
break;
- case 'o':
- guest_test_mem = strtoull(optarg, NULL, 0);
- break;
- case 't':
- top_offset = true;
+ case 'p':
+ phys_offset = strtoull(optarg, NULL, 0);
break;
case 'm':
if (!mode_selected) {
for (i = 0; i < NUM_VM_MODES; ++i)
- vm_guest_modes[i].enabled = 0;
+ vm_guest_mode_params[i].enabled = false;
mode_selected = true;
}
mode = strtoul(optarg, NULL, 10);
TEST_ASSERT(mode < NUM_VM_MODES,
"Guest mode ID %d too big", mode);
- vm_guest_modes[mode].enabled = 1;
+ vm_guest_mode_params[mode].enabled = true;
break;
case 'h':
default:
@@ -426,8 +480,6 @@ int main(int argc, char *argv[])
TEST_ASSERT(iterations > 2, "Iterations must be greater than two");
TEST_ASSERT(interval > 0, "Interval must be greater than zero");
- TEST_ASSERT(!top_offset || guest_test_mem == DEFAULT_GUEST_TEST_MEM,
- "Cannot use both -o [offset] and -t at the same time");
DEBUG("Test iterations: %"PRIu64", interval: %"PRIu64" (ms)\n",
iterations, interval);
@@ -435,13 +487,12 @@ int main(int argc, char *argv[])
srandom(time(0));
for (i = 0; i < NUM_VM_MODES; ++i) {
- if (!vm_guest_modes[i].enabled)
+ if (!vm_guest_mode_params[i].enabled)
continue;
- TEST_ASSERT(vm_guest_modes[i].supported,
+ TEST_ASSERT(vm_guest_mode_params[i].supported,
"Guest mode ID %d (%s) not supported.",
- vm_guest_modes[i].mode,
- vm_guest_mode_string(vm_guest_modes[i].mode));
- run_test(vm_guest_modes[i].mode, iterations, interval, top_offset);
+ i, vm_guest_mode_string(i));
+ run_test(i, iterations, interval, phys_offset);
}
return 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.