/x86_64/sync_regs_test
/x86_64/vmx_tsc_adjust_test
/x86_64/state_test
-/x86_64/dirty_log_test
+/dirty_log_test
LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/ucall.c lib/sparsebit.c
LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c
+LIBKVM_aarch64 = lib/aarch64/processor.c
TEST_GEN_PROGS_x86_64 = x86_64/platform_info_test
TEST_GEN_PROGS_x86_64 += x86_64/set_sregs_test
TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test
TEST_GEN_PROGS_x86_64 += x86_64/cr4_cpuid_sync_test
TEST_GEN_PROGS_x86_64 += x86_64/state_test
-TEST_GEN_PROGS_x86_64 += x86_64/dirty_log_test
+TEST_GEN_PROGS_x86_64 += dirty_log_test
+
+TEST_GEN_PROGS_aarch64 += dirty_log_test
TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M))
LIBKVM += $(LIBKVM_$(UNAME_M))
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KVM dirty page logging test
+ *
+ * Copyright (C) 2018, Red Hat, Inc.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <pthread.h>
+#include <linux/bitmap.h>
+#include <linux/bitops.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+
+#define DEBUG printf
+
+#define VCPU_ID 1
+
+/* The memory slot index to track dirty pages */
+#define TEST_MEM_SLOT_INDEX 1
+
+/*
+ * GPA offset of the testing memory slot. Must be bigger than the
+ * default vm mem slot, which is DEFAULT_GUEST_PHY_PAGES.
+ */
+#define TEST_MEM_OFFSET (1ul << 30) /* 1G */
+
+/* Size of the testing memory slot */
+#define TEST_MEM_PAGES (1ul << 18) /* 1G for 4K pages */
+
+/* How many pages to dirty for each guest loop */
+#define TEST_PAGES_PER_LOOP 1024
+
+/* How many host loops to run (one KVM_GET_DIRTY_LOG for each loop) */
+#define TEST_HOST_LOOP_N 32
+
+/* Interval for each host loop (ms) */
+#define TEST_HOST_LOOP_INTERVAL 10
+
+/*
+ * Guest/Host shared variables. Ensure addr_gva2hva() and/or
+ * sync_global_to/from_guest() are used when accessing from
+ * the host. READ/WRITE_ONCE() should also be used with anything
+ * that may change.
+ */
+static uint64_t host_page_size;
+static uint64_t guest_page_size;
+static uint64_t random_array[TEST_PAGES_PER_LOOP];
+static uint64_t iteration;
+
+/*
+ * Continuously write to the first 8 bytes of a random pages within
+ * the testing memory region.
+ */
+static void guest_code(void)
+{
+ int i;
+
+ while (true) {
+ for (i = 0; i < TEST_PAGES_PER_LOOP; i++) {
+ uint64_t addr = TEST_MEM_OFFSET;
+ addr += (READ_ONCE(random_array[i]) % TEST_MEM_PAGES)
+ * guest_page_size;
+ addr &= ~(host_page_size - 1);
+ *(uint64_t *)addr = READ_ONCE(iteration);
+ }
+
+ /* Tell the host that we need more random numbers */
+ GUEST_SYNC(1);
+ }
+}
+
+/* Host variables */
+static bool host_quit;
+
+/* Points to the test VM memory region on which we track dirty logs */
+static void *host_test_mem;
+static uint64_t host_num_pages;
+
+/* For statistics only */
+static uint64_t host_dirty_count;
+static uint64_t host_clear_count;
+static uint64_t host_track_next_count;
+
+/*
+ * We use this bitmap to track some pages that should have its dirty
+ * bit set in the _next_ iteration. For example, if we detected the
+ * page value changed to current iteration but at the same time the
+ * page bit is cleared in the latest bitmap, then the system must
+ * report that write in the next get dirty log call.
+ */
+static unsigned long *host_bmap_track;
+
+static void generate_random_array(uint64_t *guest_array, uint64_t size)
+{
+ uint64_t i;
+
+ for (i = 0; i < size; i++)
+ guest_array[i] = random();
+}
+
+static void *vcpu_worker(void *data)
+{
+ int ret;
+ struct kvm_vm *vm = data;
+ uint64_t *guest_array;
+ uint64_t pages_count = 0;
+ struct kvm_run *run;
+ struct ucall uc;
+
+ run = vcpu_state(vm, VCPU_ID);
+
+ guest_array = addr_gva2hva(vm, (vm_vaddr_t)random_array);
+ generate_random_array(guest_array, TEST_PAGES_PER_LOOP);
+
+ while (!READ_ONCE(host_quit)) {
+ /* Let the guest dirty the random pages */
+ ret = _vcpu_run(vm, VCPU_ID);
+ if (get_ucall(vm, VCPU_ID, &uc) == UCALL_SYNC) {
+ pages_count += TEST_PAGES_PER_LOOP;
+ generate_random_array(guest_array, TEST_PAGES_PER_LOOP);
+ } else {
+ TEST_ASSERT(false,
+ "Invalid guest sync status: "
+ "exit_reason=%s\n",
+ exit_reason_str(run->exit_reason));
+ }
+ }
+
+ DEBUG("Dirtied %"PRIu64" pages\n", pages_count);
+
+ return NULL;
+}
+
+static void vm_dirty_log_verify(unsigned long *bmap)
+{
+ uint64_t page;
+ uint64_t *value_ptr;
+
+ for (page = 0; page < host_num_pages; page++) {
+ value_ptr = host_test_mem + page * host_page_size;
+
+ /* If this is a special page that we were tracking... */
+ if (test_and_clear_bit(page, host_bmap_track)) {
+ host_track_next_count++;
+ TEST_ASSERT(test_bit(page, bmap),
+ "Page %"PRIu64" should have its dirty bit "
+ "set in this iteration but it is missing",
+ page);
+ }
+
+ if (test_bit(page, bmap)) {
+ host_dirty_count++;
+ /*
+ * If the bit is set, the value written onto
+ * the corresponding page should be either the
+ * previous iteration number or the current one.
+ */
+ TEST_ASSERT(*value_ptr == iteration ||
+ *value_ptr == iteration - 1,
+ "Set page %"PRIu64" value %"PRIu64
+ " incorrect (iteration=%"PRIu64")",
+ page, *value_ptr, iteration);
+ } else {
+ host_clear_count++;
+ /*
+ * If cleared, the value written can be any
+ * value smaller or equals to the iteration
+ * number. Note that the value can be exactly
+ * (iteration-1) if that write can happen
+ * like this:
+ *
+ * (1) increase loop count to "iteration-1"
+ * (2) write to page P happens (with value
+ * "iteration-1")
+ * (3) get dirty log for "iteration-1"; we'll
+ * see that page P bit is set (dirtied),
+ * and not set the bit in host_bmap_track
+ * (4) increase loop count to "iteration"
+ * (which is current iteration)
+ * (5) get dirty log for current iteration,
+ * we'll see that page P is cleared, with
+ * value "iteration-1".
+ */
+ TEST_ASSERT(*value_ptr <= iteration,
+ "Clear page %"PRIu64" value %"PRIu64
+ " incorrect (iteration=%"PRIu64")",
+ page, *value_ptr, iteration);
+ if (*value_ptr == iteration) {
+ /*
+ * This page is _just_ modified; it
+ * should report its dirtyness in the
+ * next run
+ */
+ set_bit(page, host_bmap_track);
+ }
+ }
+ }
+}
+
+static void help(char *name)
+{
+ puts("");
+ printf("usage: %s [-i iterations] [-I interval] [-h]\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);
+ puts("");
+ exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+ pthread_t vcpu_thread;
+ struct kvm_vm *vm;
+ unsigned long iterations = TEST_HOST_LOOP_N;
+ unsigned long interval = TEST_HOST_LOOP_INTERVAL;
+ unsigned long *bmap;
+ int opt;
+
+ while ((opt = getopt(argc, argv, "hi:I:")) != -1) {
+ switch (opt) {
+ case 'i':
+ iterations = strtol(optarg, NULL, 10);
+ break;
+ case 'I':
+ interval = strtol(optarg, NULL, 10);
+ break;
+ case 'h':
+ default:
+ help(argv[0]);
+ break;
+ }
+ }
+
+ TEST_ASSERT(iterations > 2, "Iterations must be greater than two");
+ TEST_ASSERT(interval > 0, "Interval must be greater than zero");
+
+ DEBUG("Test iterations: %"PRIu64", interval: %"PRIu64" (ms)\n",
+ iterations, interval);
+
+ srandom(time(0));
+
+ guest_page_size = 4096;
+ host_page_size = getpagesize();
+ host_num_pages = (TEST_MEM_PAGES * guest_page_size) / host_page_size +
+ !!((TEST_MEM_PAGES * guest_page_size) % host_page_size);
+
+ bmap = bitmap_alloc(host_num_pages);
+ host_bmap_track = bitmap_alloc(host_num_pages);
+
+ vm = vm_create_default(VCPU_ID, TEST_MEM_PAGES, guest_code);
+
+ /* Add an extra memory slot for testing dirty logging */
+ vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
+ TEST_MEM_OFFSET,
+ TEST_MEM_SLOT_INDEX,
+ TEST_MEM_PAGES,
+ KVM_MEM_LOG_DIRTY_PAGES);
+
+ /* Do 1:1 mapping for the dirty track memory slot */
+ virt_map(vm, TEST_MEM_OFFSET, TEST_MEM_OFFSET,
+ TEST_MEM_PAGES * guest_page_size, 0);
+
+ /* Cache the HVA pointer of the region */
+ host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)TEST_MEM_OFFSET);
+
+#ifdef __x86_64__
+ vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
+#endif
+#ifdef __aarch64__
+ ucall_init(vm, UCALL_MMIO, NULL);
+#endif
+
+ /* Tell the guest about the page sizes */
+ sync_global_to_guest(vm, host_page_size);
+ sync_global_to_guest(vm, guest_page_size);
+
+ /* Start the iterations */
+ iteration = 1;
+ sync_global_to_guest(vm, iteration);
+
+ pthread_create(&vcpu_thread, NULL, vcpu_worker, vm);
+
+ while (iteration < 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);
+ vm_dirty_log_verify(bmap);
+ iteration++;
+ sync_global_to_guest(vm, iteration);
+ }
+
+ /* Tell the vcpu thread to quit */
+ host_quit = true;
+ pthread_join(vcpu_thread, NULL);
+
+ DEBUG("Total bits checked: dirty (%"PRIu64"), clear (%"PRIu64"), "
+ "track_next (%"PRIu64")\n", host_dirty_count, host_clear_count,
+ host_track_next_count);
+
+ free(bmap);
+ free(host_bmap_track);
+ ucall_uninit(vm);
+ kvm_vm_free(vm);
+
+ return 0;
+}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * KVM dirty page logging test
- *
- * Copyright (C) 2018, Red Hat, Inc.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <time.h>
-#include <pthread.h>
-#include <linux/bitmap.h>
-#include <linux/bitops.h>
-
-#include "test_util.h"
-#include "kvm_util.h"
-#include "processor.h"
-
-#define DEBUG printf
-
-#define VCPU_ID 1
-/* The memory slot index to track dirty pages */
-#define TEST_MEM_SLOT_INDEX 1
-/*
- * GPA offset of the testing memory slot. Must be bigger than the
- * default vm mem slot, which is DEFAULT_GUEST_PHY_PAGES.
- */
-#define TEST_MEM_OFFSET (1ULL << 30) /* 1G */
-/* Size of the testing memory slot */
-#define TEST_MEM_PAGES (1ULL << 18) /* 1G for 4K pages */
-/* How many pages to dirty for each guest loop */
-#define TEST_PAGES_PER_LOOP 1024
-/* How many host loops to run (one KVM_GET_DIRTY_LOG for each loop) */
-#define TEST_HOST_LOOP_N 32
-/* Interval for each host loop (ms) */
-#define TEST_HOST_LOOP_INTERVAL 10
-
-/*
- * Guest variables. We use these variables to share data between host
- * and guest. There are two copies of the variables, one in host memory
- * (which is unused) and one in guest memory. When the host wants to
- * access these variables, it needs to call addr_gva2hva() to access the
- * guest copy.
- */
-uint64_t guest_random_array[TEST_PAGES_PER_LOOP];
-uint64_t guest_iteration;
-uint64_t guest_page_size;
-
-/*
- * Writes to the first byte of a random page within the testing memory
- * region continuously.
- */
-void guest_code(void)
-{
- int i = 0;
- uint64_t volatile *array = guest_random_array;
- uint64_t volatile *guest_addr;
-
- while (true) {
- for (i = 0; i < TEST_PAGES_PER_LOOP; i++) {
- /*
- * Write to the first 8 bytes of a random page
- * on the testing memory region.
- */
- guest_addr = (uint64_t *)
- (TEST_MEM_OFFSET +
- (array[i] % TEST_MEM_PAGES) * guest_page_size);
- *guest_addr = guest_iteration;
- }
- /* Tell the host that we need more random numbers */
- GUEST_SYNC(1);
- }
-}
-
-/*
- * Host variables. These variables should only be used by the host
- * rather than the guest.
- */
-bool host_quit;
-
-/* Points to the test VM memory region on which we track dirty logs */
-void *host_test_mem;
-
-/* For statistics only */
-uint64_t host_dirty_count;
-uint64_t host_clear_count;
-uint64_t host_track_next_count;
-
-/*
- * We use this bitmap to track some pages that should have its dirty
- * bit set in the _next_ iteration. For example, if we detected the
- * page value changed to current iteration but at the same time the
- * page bit is cleared in the latest bitmap, then the system must
- * report that write in the next get dirty log call.
- */
-unsigned long *host_bmap_track;
-
-void generate_random_array(uint64_t *guest_array, uint64_t size)
-{
- uint64_t i;
-
- for (i = 0; i < size; i++) {
- guest_array[i] = random();
- }
-}
-
-void *vcpu_worker(void *data)
-{
- int ret;
- uint64_t loops, *guest_array, pages_count = 0;
- struct kvm_vm *vm = data;
- struct kvm_run *run;
- struct ucall uc;
-
- run = vcpu_state(vm, VCPU_ID);
-
- /* Retrieve the guest random array pointer and cache it */
- guest_array = addr_gva2hva(vm, (vm_vaddr_t)guest_random_array);
-
- DEBUG("VCPU starts\n");
-
- generate_random_array(guest_array, TEST_PAGES_PER_LOOP);
-
- while (!READ_ONCE(host_quit)) {
- /* Let the guest to dirty these random pages */
- ret = _vcpu_run(vm, VCPU_ID);
- if (run->exit_reason == KVM_EXIT_IO &&
- get_ucall(vm, VCPU_ID, &uc) == UCALL_SYNC) {
- pages_count += TEST_PAGES_PER_LOOP;
- generate_random_array(guest_array, TEST_PAGES_PER_LOOP);
- } else {
- TEST_ASSERT(false,
- "Invalid guest sync status: "
- "exit_reason=%s\n",
- exit_reason_str(run->exit_reason));
- }
- }
-
- DEBUG("VCPU exits, dirtied %"PRIu64" pages\n", pages_count);
-
- return NULL;
-}
-
-void vm_dirty_log_verify(unsigned long *bmap, uint64_t iteration)
-{
- uint64_t page;
- uint64_t volatile *value_ptr;
-
- for (page = 0; page < TEST_MEM_PAGES; page++) {
- value_ptr = host_test_mem + page * getpagesize();
-
- /* If this is a special page that we were tracking... */
- if (test_and_clear_bit(page, host_bmap_track)) {
- host_track_next_count++;
- TEST_ASSERT(test_bit(page, bmap),
- "Page %"PRIu64" should have its dirty bit "
- "set in this iteration but it is missing",
- page);
- }
-
- if (test_bit(page, bmap)) {
- host_dirty_count++;
- /*
- * If the bit is set, the value written onto
- * the corresponding page should be either the
- * previous iteration number or the current one.
- */
- TEST_ASSERT(*value_ptr == iteration ||
- *value_ptr == iteration - 1,
- "Set page %"PRIu64" value %"PRIu64
- " incorrect (iteration=%"PRIu64")",
- page, *value_ptr, iteration);
- } else {
- host_clear_count++;
- /*
- * If cleared, the value written can be any
- * value smaller or equals to the iteration
- * number. Note that the value can be exactly
- * (iteration-1) if that write can happen
- * like this:
- *
- * (1) increase loop count to "iteration-1"
- * (2) write to page P happens (with value
- * "iteration-1")
- * (3) get dirty log for "iteration-1"; we'll
- * see that page P bit is set (dirtied),
- * and not set the bit in host_bmap_track
- * (4) increase loop count to "iteration"
- * (which is current iteration)
- * (5) get dirty log for current iteration,
- * we'll see that page P is cleared, with
- * value "iteration-1".
- */
- TEST_ASSERT(*value_ptr <= iteration,
- "Clear page %"PRIu64" value %"PRIu64
- " incorrect (iteration=%"PRIu64")",
- page, *value_ptr, iteration);
- if (*value_ptr == iteration) {
- /*
- * This page is _just_ modified; it
- * should report its dirtyness in the
- * next run
- */
- set_bit(page, host_bmap_track);
- }
- }
- }
-}
-
-void help(char *name)
-{
- puts("");
- printf("usage: %s [-i iterations] [-I interval] [-h]\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);
- puts("");
- exit(0);
-}
-
-int main(int argc, char *argv[])
-{
- pthread_t vcpu_thread;
- struct kvm_vm *vm;
- uint64_t volatile *psize, *iteration;
- unsigned long *bmap, iterations = TEST_HOST_LOOP_N,
- interval = TEST_HOST_LOOP_INTERVAL;
- int opt;
-
- while ((opt = getopt(argc, argv, "hi:I:")) != -1) {
- switch (opt) {
- case 'i':
- iterations = strtol(optarg, NULL, 10);
- break;
- case 'I':
- interval = strtol(optarg, NULL, 10);
- break;
- case 'h':
- default:
- help(argv[0]);
- break;
- }
- }
-
- TEST_ASSERT(iterations > 2, "Iteration must be bigger than zero\n");
- TEST_ASSERT(interval > 0, "Interval must be bigger than zero");
-
- DEBUG("Test iterations: %"PRIu64", interval: %"PRIu64" (ms)\n",
- iterations, interval);
-
- srandom(time(0));
-
- bmap = bitmap_alloc(TEST_MEM_PAGES);
- host_bmap_track = bitmap_alloc(TEST_MEM_PAGES);
-
- vm = vm_create_default(VCPU_ID, TEST_MEM_PAGES, guest_code);
-
- /* Add an extra memory slot for testing dirty logging */
- vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
- TEST_MEM_OFFSET,
- TEST_MEM_SLOT_INDEX,
- TEST_MEM_PAGES,
- KVM_MEM_LOG_DIRTY_PAGES);
- /* Cache the HVA pointer of the region */
- host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)TEST_MEM_OFFSET);
-
- /* Do 1:1 mapping for the dirty track memory slot */
- virt_map(vm, TEST_MEM_OFFSET, TEST_MEM_OFFSET,
- TEST_MEM_PAGES * getpagesize(), 0);
-
- vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
-
- /* Tell the guest about the page size on the system */
- psize = addr_gva2hva(vm, (vm_vaddr_t)&guest_page_size);
- *psize = getpagesize();
-
- /* Start the iterations */
- iteration = addr_gva2hva(vm, (vm_vaddr_t)&guest_iteration);
- *iteration = 1;
-
- /* Start dirtying pages */
- pthread_create(&vcpu_thread, NULL, vcpu_worker, vm);
-
- while (*iteration < 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);
- vm_dirty_log_verify(bmap, *iteration);
- (*iteration)++;
- }
-
- /* Tell the vcpu thread to quit */
- host_quit = true;
- pthread_join(vcpu_thread, NULL);
-
- DEBUG("Total bits checked: dirty (%"PRIu64"), clear (%"PRIu64"), "
- "track_next (%"PRIu64")\n", host_dirty_count, host_clear_count,
- host_track_next_count);
-
- free(bmap);
- free(host_bmap_track);
- kvm_vm_free(vm);
-
- return 0;
-}