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-rw-r--r--tools/testing/selftests/kvm/Makefile18
-rw-r--r--tools/testing/selftests/kvm/demand_paging_test.c32
-rw-r--r--tools/testing/selftests/kvm/dirty_log_perf_test.c96
-rw-r--r--tools/testing/selftests/kvm/include/kvm_util_base.h1
-rw-r--r--tools/testing/selftests/kvm/include/memstress.h8
-rw-r--r--tools/testing/selftests/kvm/lib/kvm_util.c17
-rw-r--r--tools/testing/selftests/kvm/lib/memstress.c75
-rw-r--r--tools/testing/selftests/kvm/lib/userfaultfd_util.c4
-rw-r--r--tools/testing/selftests/kvm/x86_64/dirty_log_page_splitting_test.c259
-rw-r--r--tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c2
-rw-r--r--tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c22
11 files changed, 416 insertions, 118 deletions
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 74e0a44f9216..c692cc86e7da 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -61,6 +61,7 @@ TEST_PROGS_x86_64 += x86_64/nx_huge_pages_test.sh
# Compiled test targets
TEST_GEN_PROGS_x86_64 = x86_64/cpuid_test
TEST_GEN_PROGS_x86_64 += x86_64/cr4_cpuid_sync_test
+TEST_GEN_PROGS_x86_64 += x86_64/dirty_log_page_splitting_test
TEST_GEN_PROGS_x86_64 += x86_64/get_msr_index_features
TEST_GEN_PROGS_x86_64 += x86_64/exit_on_emulation_failure_test
TEST_GEN_PROGS_x86_64 += x86_64/fix_hypercall_test
@@ -185,6 +186,8 @@ TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(ARCH_DIR))
TEST_GEN_PROGS_EXTENDED += $(TEST_GEN_PROGS_EXTENDED_$(ARCH_DIR))
LIBKVM += $(LIBKVM_$(ARCH_DIR))
+OVERRIDE_TARGETS = 1
+
# lib.mak defines $(OUTPUT), prepends $(OUTPUT)/ to $(TEST_GEN_PROGS), and most
# importantly defines, i.e. overwrites, $(CC) (unless `make -e` or `make CC=`,
# which causes the environment variable to override the makefile).
@@ -199,7 +202,7 @@ else
LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/$(ARCH)/include
endif
CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \
- -Wno-gnu-variable-sized-type-not-at-end \
+ -Wno-gnu-variable-sized-type-not-at-end -MD\
-fno-builtin-memcmp -fno-builtin-memcpy -fno-builtin-memset \
-fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \
-I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \
@@ -226,7 +229,18 @@ LIBKVM_S_OBJ := $(patsubst %.S, $(OUTPUT)/%.o, $(LIBKVM_S))
LIBKVM_STRING_OBJ := $(patsubst %.c, $(OUTPUT)/%.o, $(LIBKVM_STRING))
LIBKVM_OBJS = $(LIBKVM_C_OBJ) $(LIBKVM_S_OBJ) $(LIBKVM_STRING_OBJ)
-EXTRA_CLEAN += $(LIBKVM_OBJS) cscope.*
+TEST_GEN_OBJ = $(patsubst %, %.o, $(TEST_GEN_PROGS))
+TEST_GEN_OBJ += $(patsubst %, %.o, $(TEST_GEN_PROGS_EXTENDED))
+TEST_DEP_FILES = $(patsubst %.o, %.d, $(TEST_GEN_OBJ))
+TEST_DEP_FILES += $(patsubst %.o, %.d, $(LIBKVM_OBJS))
+-include $(TEST_DEP_FILES)
+
+$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): %: %.o
+ $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH) $< $(LIBKVM_OBJS) $(LDLIBS) -o $@
+$(TEST_GEN_OBJ): $(OUTPUT)/%.o: %.c
+ $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c $< -o $@
+
+EXTRA_CLEAN += $(LIBKVM_OBJS) $(TEST_DEP_FILES) $(TEST_GEN_OBJ) cscope.*
x := $(shell mkdir -p $(sort $(dir $(LIBKVM_C_OBJ) $(LIBKVM_S_OBJ))))
$(LIBKVM_C_OBJ): $(OUTPUT)/%.o: %.c
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index 2439c4043fed..09c116a82a84 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -128,6 +128,7 @@ static void prefault_mem(void *alias, uint64_t len)
static void run_test(enum vm_guest_mode mode, void *arg)
{
+ struct memstress_vcpu_args *vcpu_args;
struct test_params *p = arg;
struct uffd_desc **uffd_descs = NULL;
struct timespec start;
@@ -145,24 +146,24 @@ static void run_test(enum vm_guest_mode mode, void *arg)
"Failed to allocate buffer for guest data pattern");
memset(guest_data_prototype, 0xAB, demand_paging_size);
+ if (p->uffd_mode == UFFDIO_REGISTER_MODE_MINOR) {
+ for (i = 0; i < nr_vcpus; i++) {
+ vcpu_args = &memstress_args.vcpu_args[i];
+ prefault_mem(addr_gpa2alias(vm, vcpu_args->gpa),
+ vcpu_args->pages * memstress_args.guest_page_size);
+ }
+ }
+
if (p->uffd_mode) {
uffd_descs = malloc(nr_vcpus * sizeof(struct uffd_desc *));
TEST_ASSERT(uffd_descs, "Memory allocation failed");
-
for (i = 0; i < nr_vcpus; i++) {
- struct memstress_vcpu_args *vcpu_args;
void *vcpu_hva;
- void *vcpu_alias;
vcpu_args = &memstress_args.vcpu_args[i];
/* Cache the host addresses of the region */
vcpu_hva = addr_gpa2hva(vm, vcpu_args->gpa);
- vcpu_alias = addr_gpa2alias(vm, vcpu_args->gpa);
-
- prefault_mem(vcpu_alias,
- vcpu_args->pages * memstress_args.guest_page_size);
-
/*
* Set up user fault fd to handle demand paging
* requests.
@@ -207,10 +208,11 @@ static void help(char *name)
{
puts("");
printf("usage: %s [-h] [-m vm_mode] [-u uffd_mode] [-d uffd_delay_usec]\n"
- " [-b memory] [-s type] [-v vcpus] [-o]\n", name);
+ " [-b memory] [-s type] [-v vcpus] [-c cpu_list] [-o]\n", name);
guest_modes_help();
printf(" -u: use userfaultfd to handle vCPU page faults. Mode is a\n"
" UFFD registration mode: 'MISSING' or 'MINOR'.\n");
+ kvm_print_vcpu_pinning_help();
printf(" -d: add a delay in usec to the User Fault\n"
" FD handler to simulate demand paging\n"
" overheads. Ignored without -u.\n");
@@ -228,6 +230,7 @@ static void help(char *name)
int main(int argc, char *argv[])
{
int max_vcpus = kvm_check_cap(KVM_CAP_MAX_VCPUS);
+ const char *cpulist = NULL;
struct test_params p = {
.src_type = DEFAULT_VM_MEM_SRC,
.partition_vcpu_memory_access = true,
@@ -236,7 +239,7 @@ int main(int argc, char *argv[])
guest_modes_append_default();
- while ((opt = getopt(argc, argv, "hm:u:d:b:s:v:o")) != -1) {
+ while ((opt = getopt(argc, argv, "hm:u:d:b:s:v:c:o")) != -1) {
switch (opt) {
case 'm':
guest_modes_cmdline(optarg);
@@ -263,6 +266,9 @@ int main(int argc, char *argv[])
TEST_ASSERT(nr_vcpus <= max_vcpus,
"Invalid number of vcpus, must be between 1 and %d", max_vcpus);
break;
+ case 'c':
+ cpulist = optarg;
+ break;
case 'o':
p.partition_vcpu_memory_access = false;
break;
@@ -278,6 +284,12 @@ int main(int argc, char *argv[])
TEST_FAIL("userfaultfd MINOR mode requires shared memory; pick a different -s");
}
+ if (cpulist) {
+ kvm_parse_vcpu_pinning(cpulist, memstress_args.vcpu_to_pcpu,
+ nr_vcpus);
+ memstress_args.pin_vcpus = true;
+ }
+
for_each_guest_mode(run_test, &p);
return 0;
diff --git a/tools/testing/selftests/kvm/dirty_log_perf_test.c b/tools/testing/selftests/kvm/dirty_log_perf_test.c
index e9d6d1aecf89..d374dbcf9a53 100644
--- a/tools/testing/selftests/kvm/dirty_log_perf_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_perf_test.c
@@ -136,77 +136,6 @@ struct test_params {
bool random_access;
};
-static void toggle_dirty_logging(struct kvm_vm *vm, int slots, bool enable)
-{
- int i;
-
- for (i = 0; i < slots; i++) {
- int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
- int flags = enable ? KVM_MEM_LOG_DIRTY_PAGES : 0;
-
- vm_mem_region_set_flags(vm, slot, flags);
- }
-}
-
-static inline void enable_dirty_logging(struct kvm_vm *vm, int slots)
-{
- toggle_dirty_logging(vm, slots, true);
-}
-
-static inline void disable_dirty_logging(struct kvm_vm *vm, int slots)
-{
- toggle_dirty_logging(vm, slots, false);
-}
-
-static void get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots)
-{
- int i;
-
- for (i = 0; i < slots; i++) {
- int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
-
- kvm_vm_get_dirty_log(vm, slot, bitmaps[i]);
- }
-}
-
-static void clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[],
- int slots, uint64_t pages_per_slot)
-{
- int i;
-
- for (i = 0; i < slots; i++) {
- int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
-
- kvm_vm_clear_dirty_log(vm, slot, bitmaps[i], 0, pages_per_slot);
- }
-}
-
-static unsigned long **alloc_bitmaps(int slots, uint64_t pages_per_slot)
-{
- unsigned long **bitmaps;
- int i;
-
- bitmaps = malloc(slots * sizeof(bitmaps[0]));
- TEST_ASSERT(bitmaps, "Failed to allocate bitmaps array.");
-
- for (i = 0; i < slots; i++) {
- bitmaps[i] = bitmap_zalloc(pages_per_slot);
- TEST_ASSERT(bitmaps[i], "Failed to allocate slot bitmap.");
- }
-
- return bitmaps;
-}
-
-static void free_bitmaps(unsigned long *bitmaps[], int slots)
-{
- int i;
-
- for (i = 0; i < slots; i++)
- free(bitmaps[i]);
-
- free(bitmaps);
-}
-
static void run_test(enum vm_guest_mode mode, void *arg)
{
struct test_params *p = arg;
@@ -236,7 +165,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
host_num_pages = vm_num_host_pages(mode, guest_num_pages);
pages_per_slot = host_num_pages / p->slots;
- bitmaps = alloc_bitmaps(p->slots, pages_per_slot);
+ bitmaps = memstress_alloc_bitmaps(p->slots, pages_per_slot);
if (dirty_log_manual_caps)
vm_enable_cap(vm, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2,
@@ -277,7 +206,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
/* Enable dirty logging */
clock_gettime(CLOCK_MONOTONIC, &start);
- enable_dirty_logging(vm, p->slots);
+ memstress_enable_dirty_logging(vm, p->slots);
ts_diff = timespec_elapsed(start);
pr_info("Enabling dirty logging time: %ld.%.9lds\n\n",
ts_diff.tv_sec, ts_diff.tv_nsec);
@@ -306,7 +235,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
iteration, ts_diff.tv_sec, ts_diff.tv_nsec);
clock_gettime(CLOCK_MONOTONIC, &start);
- get_dirty_log(vm, bitmaps, p->slots);
+ memstress_get_dirty_log(vm, bitmaps, p->slots);
ts_diff = timespec_elapsed(start);
get_dirty_log_total = timespec_add(get_dirty_log_total,
ts_diff);
@@ -315,7 +244,8 @@ static void run_test(enum vm_guest_mode mode, void *arg)
if (dirty_log_manual_caps) {
clock_gettime(CLOCK_MONOTONIC, &start);
- clear_dirty_log(vm, bitmaps, p->slots, pages_per_slot);
+ memstress_clear_dirty_log(vm, bitmaps, p->slots,
+ pages_per_slot);
ts_diff = timespec_elapsed(start);
clear_dirty_log_total = timespec_add(clear_dirty_log_total,
ts_diff);
@@ -334,7 +264,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
/* Disable dirty logging */
clock_gettime(CLOCK_MONOTONIC, &start);
- disable_dirty_logging(vm, p->slots);
+ memstress_disable_dirty_logging(vm, p->slots);
ts_diff = timespec_elapsed(start);
pr_info("Disabling dirty logging time: %ld.%.9lds\n",
ts_diff.tv_sec, ts_diff.tv_nsec);
@@ -359,7 +289,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
clear_dirty_log_total.tv_nsec, avg.tv_sec, avg.tv_nsec);
}
- free_bitmaps(bitmaps, p->slots);
+ memstress_free_bitmaps(bitmaps, p->slots);
arch_cleanup_vm(vm);
memstress_destroy_vm(vm);
}
@@ -402,17 +332,7 @@ static void help(char *name)
" so -w X means each page has an X%% chance of writing\n"
" and a (100-X)%% chance of reading.\n"
" (default: 100 i.e. all pages are written to.)\n");
- printf(" -c: Pin tasks to physical CPUs. Takes a list of comma separated\n"
- " values (target pCPU), one for each vCPU, plus an optional\n"
- " entry for the main application task (specified via entry\n"
- " <nr_vcpus + 1>). If used, entries must be provided for all\n"
- " vCPUs, i.e. pinning vCPUs is all or nothing.\n\n"
- " E.g. to create 3 vCPUs, pin vCPU0=>pCPU22, vCPU1=>pCPU23,\n"
- " vCPU2=>pCPU24, and pin the application task to pCPU50:\n\n"
- " ./dirty_log_perf_test -v 3 -c 22,23,24,50\n\n"
- " To leave the application task unpinned, drop the final entry:\n\n"
- " ./dirty_log_perf_test -v 3 -c 22,23,24\n\n"
- " (default: no pinning)\n");
+ kvm_print_vcpu_pinning_help();
puts("");
exit(0);
}
diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index a089c356f354..07732a157ccd 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -733,6 +733,7 @@ static inline struct kvm_vm *vm_create_with_one_vcpu(struct kvm_vcpu **vcpu,
struct kvm_vcpu *vm_recreate_with_one_vcpu(struct kvm_vm *vm);
void kvm_pin_this_task_to_pcpu(uint32_t pcpu);
+void kvm_print_vcpu_pinning_help(void);
void kvm_parse_vcpu_pinning(const char *pcpus_string, uint32_t vcpu_to_pcpu[],
int nr_vcpus);
diff --git a/tools/testing/selftests/kvm/include/memstress.h b/tools/testing/selftests/kvm/include/memstress.h
index 72e3e358ef7b..ce4e603050ea 100644
--- a/tools/testing/selftests/kvm/include/memstress.h
+++ b/tools/testing/selftests/kvm/include/memstress.h
@@ -72,4 +72,12 @@ void memstress_guest_code(uint32_t vcpu_id);
uint64_t memstress_nested_pages(int nr_vcpus);
void memstress_setup_nested(struct kvm_vm *vm, int nr_vcpus, struct kvm_vcpu *vcpus[]);
+void memstress_enable_dirty_logging(struct kvm_vm *vm, int slots);
+void memstress_disable_dirty_logging(struct kvm_vm *vm, int slots);
+void memstress_get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots);
+void memstress_clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[],
+ int slots, uint64_t pages_per_slot);
+unsigned long **memstress_alloc_bitmaps(int slots, uint64_t pages_per_slot);
+void memstress_free_bitmaps(unsigned long *bitmaps[], int slots);
+
#endif /* SELFTEST_KVM_MEMSTRESS_H */
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 298c4372fb1a..9741a7ff6380 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -494,6 +494,23 @@ static uint32_t parse_pcpu(const char *cpu_str, const cpu_set_t *allowed_mask)
return pcpu;
}
+void kvm_print_vcpu_pinning_help(void)
+{
+ const char *name = program_invocation_name;
+
+ printf(" -c: Pin tasks to physical CPUs. Takes a list of comma separated\n"
+ " values (target pCPU), one for each vCPU, plus an optional\n"
+ " entry for the main application task (specified via entry\n"
+ " <nr_vcpus + 1>). If used, entries must be provided for all\n"
+ " vCPUs, i.e. pinning vCPUs is all or nothing.\n\n"
+ " E.g. to create 3 vCPUs, pin vCPU0=>pCPU22, vCPU1=>pCPU23,\n"
+ " vCPU2=>pCPU24, and pin the application task to pCPU50:\n\n"
+ " %s -v 3 -c 22,23,24,50\n\n"
+ " To leave the application task unpinned, drop the final entry:\n\n"
+ " %s -v 3 -c 22,23,24\n\n"
+ " (default: no pinning)\n", name, name);
+}
+
void kvm_parse_vcpu_pinning(const char *pcpus_string, uint32_t vcpu_to_pcpu[],
int nr_vcpus)
{
diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
index 5f1d3173c238..df457452d146 100644
--- a/tools/testing/selftests/kvm/lib/memstress.c
+++ b/tools/testing/selftests/kvm/lib/memstress.c
@@ -5,6 +5,7 @@
#define _GNU_SOURCE
#include <inttypes.h>
+#include <linux/bitmap.h>
#include "kvm_util.h"
#include "memstress.h"
@@ -64,6 +65,9 @@ void memstress_guest_code(uint32_t vcpu_idx)
GUEST_ASSERT(vcpu_args->vcpu_idx == vcpu_idx);
while (true) {
+ for (i = 0; i < sizeof(memstress_args); i += args->guest_page_size)
+ (void) *((volatile char *)args + i);
+
for (i = 0; i < pages; i++) {
if (args->random_access)
page = guest_random_u32(&rand_state) % pages;
@@ -320,3 +324,74 @@ void memstress_join_vcpu_threads(int nr_vcpus)
for (i = 0; i < nr_vcpus; i++)
pthread_join(vcpu_threads[i].thread, NULL);
}
+
+static void toggle_dirty_logging(struct kvm_vm *vm, int slots, bool enable)
+{
+ int i;
+
+ for (i = 0; i < slots; i++) {
+ int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
+ int flags = enable ? KVM_MEM_LOG_DIRTY_PAGES : 0;
+
+ vm_mem_region_set_flags(vm, slot, flags);
+ }
+}
+
+void memstress_enable_dirty_logging(struct kvm_vm *vm, int slots)
+{
+ toggle_dirty_logging(vm, slots, true);
+}
+
+void memstress_disable_dirty_logging(struct kvm_vm *vm, int slots)
+{
+ toggle_dirty_logging(vm, slots, false);
+}
+
+void memstress_get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots)
+{
+ int i;
+
+ for (i = 0; i < slots; i++) {
+ int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
+
+ kvm_vm_get_dirty_log(vm, slot, bitmaps[i]);
+ }
+}
+
+void memstress_clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[],
+ int slots, uint64_t pages_per_slot)
+{
+ int i;
+
+ for (i = 0; i < slots; i++) {
+ int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
+
+ kvm_vm_clear_dirty_log(vm, slot, bitmaps[i], 0, pages_per_slot);
+ }
+}
+
+unsigned long **memstress_alloc_bitmaps(int slots, uint64_t pages_per_slot)
+{
+ unsigned long **bitmaps;
+ int i;
+
+ bitmaps = malloc(slots * sizeof(bitmaps[0]));
+ TEST_ASSERT(bitmaps, "Failed to allocate bitmaps array.");
+
+ for (i = 0; i < slots; i++) {
+ bitmaps[i] = bitmap_zalloc(pages_per_slot);
+ TEST_ASSERT(bitmaps[i], "Failed to allocate slot bitmap.");
+ }
+
+ return bitmaps;
+}
+
+void memstress_free_bitmaps(unsigned long *bitmaps[], int slots)
+{
+ int i;
+
+ for (i = 0; i < slots; i++)
+ free(bitmaps[i]);
+
+ free(bitmaps);
+}
diff --git a/tools/testing/selftests/kvm/lib/userfaultfd_util.c b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
index 92cef20902f1..271f63891581 100644
--- a/tools/testing/selftests/kvm/lib/userfaultfd_util.c
+++ b/tools/testing/selftests/kvm/lib/userfaultfd_util.c
@@ -70,7 +70,7 @@ static void *uffd_handler_thread_fn(void *arg)
r = read(pollfd[1].fd, &tmp_chr, 1);
TEST_ASSERT(r == 1,
"Error reading pipefd in UFFD thread\n");
- return NULL;
+ break;
}
if (!(pollfd[0].revents & POLLIN))
@@ -103,7 +103,7 @@ static void *uffd_handler_thread_fn(void *arg)
ts_diff = timespec_elapsed(start);
PER_VCPU_DEBUG("userfaulted %ld pages over %ld.%.9lds. (%f/sec)\n",
pages, ts_diff.tv_sec, ts_diff.tv_nsec,
- pages / ((double)ts_diff.tv_sec + (double)ts_diff.tv_nsec / 100000000.0));
+ pages / ((double)ts_diff.tv_sec + (double)ts_diff.tv_nsec / NSEC_PER_SEC));
return NULL;
}
diff --git a/tools/testing/selftests/kvm/x86_64/dirty_log_page_splitting_test.c b/tools/testing/selftests/kvm/x86_64/dirty_log_page_splitting_test.c
new file mode 100644
index 000000000000..beb7e2c10211
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/dirty_log_page_splitting_test.c
@@ -0,0 +1,259 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KVM dirty logging page splitting test
+ *
+ * Based on dirty_log_perf.c
+ *
+ * Copyright (C) 2018, Red Hat, Inc.
+ * Copyright (C) 2023, Google, Inc.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <linux/bitmap.h>
+
+#include "kvm_util.h"
+#include "test_util.h"
+#include "memstress.h"
+#include "guest_modes.h"
+
+#define VCPUS 2
+#define SLOTS 2
+#define ITERATIONS 2
+
+static uint64_t guest_percpu_mem_size = DEFAULT_PER_VCPU_MEM_SIZE;
+
+static enum vm_mem_backing_src_type backing_src = VM_MEM_SRC_ANONYMOUS_HUGETLB;
+
+static u64 dirty_log_manual_caps;
+static bool host_quit;
+static int iteration;
+static int vcpu_last_completed_iteration[KVM_MAX_VCPUS];
+
+struct kvm_page_stats {
+ uint64_t pages_4k;
+ uint64_t pages_2m;
+ uint64_t pages_1g;
+ uint64_t hugepages;
+};
+
+static void get_page_stats(struct kvm_vm *vm, struct kvm_page_stats *stats, const char *stage)
+{
+ stats->pages_4k = vm_get_stat(vm, "pages_4k");
+ stats->pages_2m = vm_get_stat(vm, "pages_2m");
+ stats->pages_1g = vm_get_stat(vm, "pages_1g");
+ stats->hugepages = stats->pages_2m + stats->pages_1g;
+
+ pr_debug("\nPage stats after %s: 4K: %ld 2M: %ld 1G: %ld huge: %ld\n",
+ stage, stats->pages_4k, stats->pages_2m, stats->pages_1g,
+ stats->hugepages);
+}
+
+static void run_vcpu_iteration(struct kvm_vm *vm)
+{
+ int i;
+
+ iteration++;
+ for (i = 0; i < VCPUS; i++) {
+ while (READ_ONCE(vcpu_last_completed_iteration[i]) !=
+ iteration)
+ ;
+ }
+}
+
+static void vcpu_worker(struct memstress_vcpu_args *vcpu_args)
+{
+ struct kvm_vcpu *vcpu = vcpu_args->vcpu;
+ int vcpu_idx = vcpu_args->vcpu_idx;
+
+ while (!READ_ONCE(host_quit)) {
+ int current_iteration = READ_ONCE(iteration);
+
+ vcpu_run(vcpu);
+
+ ASSERT_EQ(get_ucall(vcpu, NULL), UCALL_SYNC);
+
+ vcpu_last_completed_iteration[vcpu_idx] = current_iteration;
+
+ /* Wait for the start of the next iteration to be signaled. */
+ while (current_iteration == READ_ONCE(iteration) &&
+ READ_ONCE(iteration) >= 0 &&
+ !READ_ONCE(host_quit))
+ ;
+ }
+}
+
+static void run_test(enum vm_guest_mode mode, void *unused)
+{
+ struct kvm_vm *vm;
+ unsigned long **bitmaps;
+ uint64_t guest_num_pages;
+ uint64_t host_num_pages;
+ uint64_t pages_per_slot;
+ int i;
+ uint64_t total_4k_pages;
+ struct kvm_page_stats stats_populated;
+ struct kvm_page_stats stats_dirty_logging_enabled;
+ struct kvm_page_stats stats_dirty_pass[ITERATIONS];
+ struct kvm_page_stats stats_clear_pass[ITERATIONS];
+ struct kvm_page_stats stats_dirty_logging_disabled;
+ struct kvm_page_stats stats_repopulated;
+
+ vm = memstress_create_vm(mode, VCPUS, guest_percpu_mem_size,
+ SLOTS, backing_src, false);
+
+ guest_num_pages = (VCPUS * guest_percpu_mem_size) >> vm->page_shift;
+ guest_num_pages = vm_adjust_num_guest_pages(mode, guest_num_pages);
+ host_num_pages = vm_num_host_pages(mode, guest_num_pages);
+ pages_per_slot = host_num_pages / SLOTS;
+
+ bitmaps = memstress_alloc_bitmaps(SLOTS, pages_per_slot);
+
+ if (dirty_log_manual_caps)
+ vm_enable_cap(vm, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2,
+ dirty_log_manual_caps);
+
+ /* Start the iterations */
+ iteration = -1;
+ host_quit = false;
+
+ for (i = 0; i < VCPUS; i++)
+ vcpu_last_completed_iteration[i] = -1;
+
+ memstress_start_vcpu_threads(VCPUS, vcpu_worker);
+
+ run_vcpu_iteration(vm);
+ get_page_stats(vm, &stats_populated, "populating memory");
+
+ /* Enable dirty logging */
+ memstress_enable_dirty_logging(vm, SLOTS);
+
+ get_page_stats(vm, &stats_dirty_logging_enabled, "enabling dirty logging");
+
+ while (iteration < ITERATIONS) {
+ run_vcpu_iteration(vm);
+ get_page_stats(vm, &stats_dirty_pass[iteration - 1],
+ "dirtying memory");
+
+ memstress_get_dirty_log(vm, bitmaps, SLOTS);
+
+ if (dirty_log_manual_caps) {
+ memstress_clear_dirty_log(vm, bitmaps, SLOTS, pages_per_slot);
+
+ get_page_stats(vm, &stats_clear_pass[iteration - 1], "clearing dirty log");
+ }
+ }
+
+ /* Disable dirty logging */
+ memstress_disable_dirty_logging(vm, SLOTS);
+
+ get_page_stats(vm, &stats_dirty_logging_disabled, "disabling dirty logging");
+
+ /* Run vCPUs again to fault pages back in. */
+ run_vcpu_iteration(vm);
+ get_page_stats(vm, &stats_repopulated, "repopulating memory");
+
+ /*
+ * Tell the vCPU threads to quit. No need to manually check that vCPUs
+ * have stopped running after disabling dirty logging, the join will
+ * wait for them to exit.
+ */
+ host_quit = true;
+ memstress_join_vcpu_threads(VCPUS);
+
+ memstress_free_bitmaps(bitmaps, SLOTS);
+ memstress_destroy_vm(vm);
+
+ /* Make assertions about the page counts. */
+ total_4k_pages = stats_populated.pages_4k;
+ total_4k_pages += stats_populated.pages_2m * 512;
+ total_4k_pages += stats_populated.pages_1g * 512 * 512;
+
+ /*
+ * Check that all huge pages were split. Since large pages can only
+ * exist in the data slot, and the vCPUs should have dirtied all pages
+ * in the data slot, there should be no huge pages left after splitting.
+ * Splitting happens at dirty log enable time without
+ * KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 and after the first clear pass
+ * with that capability.
+ */
+ if (dirty_log_manual_caps) {
+ ASSERT_EQ(stats_clear_pass[0].hugepages, 0);
+ ASSERT_EQ(stats_clear_pass[0].pages_4k, total_4k_pages);
+ ASSERT_EQ(stats_dirty_logging_enabled.hugepages, stats_populated.hugepages);
+ } else {
+ ASSERT_EQ(stats_dirty_logging_enabled.hugepages, 0);
+ ASSERT_EQ(stats_dirty_logging_enabled.pages_4k, total_4k_pages);
+ }
+
+ /*
+ * Once dirty logging is disabled and the vCPUs have touched all their
+ * memory again, the page counts should be the same as they were
+ * right after initial population of memory.
+ */
+ ASSERT_EQ(stats_populated.pages_4k, stats_repopulated.pages_4k);
+ ASSERT_EQ(stats_populated.pages_2m, stats_repopulated.pages_2m);
+ ASSERT_EQ(stats_populated.pages_1g, stats_repopulated.pages_1g);
+}
+
+static void help(char *name)
+{
+ puts("");
+ printf("usage: %s [-h] [-b vcpu bytes] [-s mem type]\n",
+ name);
+ puts("");
+ printf(" -b: specify the size of the memory region which should be\n"
+ " dirtied by each vCPU. e.g. 10M or 3G.\n"
+ " (default: 1G)\n");
+ backing_src_help("-s");
+ puts("");
+}
+
+int main(int argc, char *argv[])
+{
+ int opt;
+
+ TEST_REQUIRE(get_kvm_param_bool("eager_page_split"));
+ TEST_REQUIRE(get_kvm_param_bool("tdp_mmu"));
+
+ while ((opt = getopt(argc, argv, "b:hs:")) != -1) {
+ switch (opt) {
+ case 'b':
+ guest_percpu_mem_size = parse_size(optarg);
+ break;
+ case 'h':
+ help(argv[0]);
+ exit(0);
+ case 's':
+ backing_src = parse_backing_src_type(optarg);
+ break;
+ default:
+ help(argv[0]);
+ exit(1);
+ }
+ }
+
+ if (!is_backing_src_hugetlb(backing_src)) {
+ pr_info("This test will only work reliably with HugeTLB memory. "
+ "It can work with THP, but that is best effort.\n");
+ }
+
+ guest_modes_append_default();
+
+ dirty_log_manual_caps = 0;
+ for_each_guest_mode(run_test, NULL);
+
+ dirty_log_manual_caps =
+ kvm_check_cap(KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2);
+
+ if (dirty_log_manual_caps) {
+ dirty_log_manual_caps &= (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE |
+ KVM_DIRTY_LOG_INITIALLY_SET);
+ for_each_guest_mode(run_test, NULL);
+ } else {
+ pr_info("Skipping testing with MANUAL_PROTECT as it is not supported");
+ }
+
+ return 0;
+}
diff --git a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
index 251794f83719..7f36c32fa760 100644
--- a/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
+++ b/tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c
@@ -226,7 +226,7 @@ static void help(char *name)
puts("");
printf("usage: %s [-h] [-p period_ms] [-t token]\n", name);
puts("");
- printf(" -p: The NX reclaim period in miliseconds.\n");
+ printf(" -p: The NX reclaim period in milliseconds.\n");
printf(" -t: The magic token to indicate environment setup is done.\n");
printf(" -r: The test has reboot permissions and can disable NX huge pages.\n");
puts("");
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c b/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
index fa03c8d1ce4e..e710b6e7fb38 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c
@@ -116,29 +116,21 @@ static void l1_guest_code(struct vmx_pages *vmx_pages)
GUEST_DONE();
}
-static void stable_tsc_check_supported(void)
+static bool system_has_stable_tsc(void)
{
+ bool tsc_is_stable;
FILE *fp;
char buf[4];
fp = fopen("/sys/devices/system/clocksource/clocksource0/current_clocksource", "r");
if (fp == NULL)
- goto skip_test;
+ return false;
- if (fgets(buf, sizeof(buf), fp) == NULL)
- goto close_fp;
+ tsc_is_stable = fgets(buf, sizeof(buf), fp) &&
+ !strncmp(buf, "tsc", sizeof(buf));
- if (strncmp(buf, "tsc", sizeof(buf)))
- goto close_fp;
-
- fclose(fp);
- return;
-
-close_fp:
fclose(fp);
-skip_test:
- print_skip("Kernel does not use TSC clocksource - assuming that host TSC is not stable");
- exit(KSFT_SKIP);
+ return tsc_is_stable;
}
int main(int argc, char *argv[])
@@ -156,7 +148,7 @@ int main(int argc, char *argv[])
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
TEST_REQUIRE(kvm_has_cap(KVM_CAP_TSC_CONTROL));
- stable_tsc_check_supported();
+ TEST_REQUIRE(system_has_stable_tsc());
/*
* We set L1's scale factor to be a random number from 2 to 10.
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-29 15:14:23 +0000