kvm: selftests: support high GPAs in dirty_log_test
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrew Jones
Paolo Bonzini
parent
e28934e661
commit
5b8ee8792f
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@ -26,11 +26,8 @@
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/* The memory slot index to track dirty pages */
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#define TEST_MEM_SLOT_INDEX 1
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/*
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* GPA offset of the testing memory slot. Must be bigger than the
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* default vm mem slot, which is DEFAULT_GUEST_PHY_PAGES.
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*/
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#define TEST_MEM_OFFSET (1ul << 30) /* 1G */
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/* Default guest test memory offset, 1G */
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#define DEFAULT_GUEST_TEST_MEM 0x40000000
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/* How many pages to dirty for each guest loop */
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#define TEST_PAGES_PER_LOOP 1024
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@ -53,6 +50,12 @@ static uint64_t guest_num_pages;
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static uint64_t random_array[TEST_PAGES_PER_LOOP];
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static uint64_t iteration;
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/*
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* GPA offset of the testing memory slot. Must be bigger than
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* DEFAULT_GUEST_PHY_PAGES.
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*/
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static uint64_t guest_test_mem = DEFAULT_GUEST_TEST_MEM;
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/*
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* Continuously write to the first 8 bytes of a random pages within
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* the testing memory region.
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@ -63,7 +66,7 @@ static void guest_code(void)
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while (true) {
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for (i = 0; i < TEST_PAGES_PER_LOOP; i++) {
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uint64_t addr = TEST_MEM_OFFSET;
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uint64_t addr = guest_test_mem;
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addr += (READ_ONCE(random_array[i]) % guest_num_pages)
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* guest_page_size;
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addr &= ~(host_page_size - 1);
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@ -221,20 +224,29 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid,
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}
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static void run_test(enum vm_guest_mode mode, unsigned long iterations,
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unsigned long interval)
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unsigned long interval, bool top_offset)
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{
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unsigned int guest_page_shift;
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unsigned int guest_pa_bits, guest_page_shift;
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pthread_t vcpu_thread;
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struct kvm_vm *vm;
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uint64_t max_gfn;
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unsigned long *bmap;
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switch (mode) {
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case VM_MODE_P52V48_4K:
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case VM_MODE_P40V48_4K:
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guest_pa_bits = 52;
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guest_page_shift = 12;
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break;
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case VM_MODE_P52V48_64K:
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guest_pa_bits = 52;
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guest_page_shift = 16;
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break;
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case VM_MODE_P40V48_4K:
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guest_pa_bits = 40;
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guest_page_shift = 12;
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break;
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case VM_MODE_P40V48_64K:
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guest_pa_bits = 40;
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guest_page_shift = 16;
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break;
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default:
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@ -243,6 +255,7 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
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DEBUG("Testing guest mode: %s\n", vm_guest_mode_string(mode));
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max_gfn = (1ul << (guest_pa_bits - guest_page_shift)) - 1;
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guest_page_size = (1ul << guest_page_shift);
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/* 1G of guest page sized pages */
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guest_num_pages = (1ul << (30 - guest_page_shift));
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@ -250,6 +263,13 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
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host_num_pages = (guest_num_pages * guest_page_size) / host_page_size +
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!!((guest_num_pages * guest_page_size) % host_page_size);
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if (top_offset) {
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guest_test_mem = (max_gfn - guest_num_pages) * guest_page_size;
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guest_test_mem &= ~(host_page_size - 1);
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}
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DEBUG("guest test mem offset: 0x%lx\n", guest_test_mem);
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bmap = bitmap_alloc(host_num_pages);
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host_bmap_track = bitmap_alloc(host_num_pages);
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@ -257,17 +277,17 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
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/* Add an extra memory slot for testing dirty logging */
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vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
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TEST_MEM_OFFSET,
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guest_test_mem,
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TEST_MEM_SLOT_INDEX,
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guest_num_pages,
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KVM_MEM_LOG_DIRTY_PAGES);
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/* Do 1:1 mapping for the dirty track memory slot */
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virt_map(vm, TEST_MEM_OFFSET, TEST_MEM_OFFSET,
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virt_map(vm, guest_test_mem, guest_test_mem,
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guest_num_pages * guest_page_size, 0);
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/* Cache the HVA pointer of the region */
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host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)TEST_MEM_OFFSET);
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host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)guest_test_mem);
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#ifdef __x86_64__
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vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
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@ -279,6 +299,7 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
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/* Export the shared variables to the guest */
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sync_global_to_guest(vm, host_page_size);
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sync_global_to_guest(vm, guest_page_size);
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sync_global_to_guest(vm, guest_test_mem);
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sync_global_to_guest(vm, guest_num_pages);
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/* Start the iterations */
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@ -337,12 +358,17 @@ static void help(char *name)
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int i;
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puts("");
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printf("usage: %s [-h] [-i iterations] [-I interval] [-m mode]\n", name);
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printf("usage: %s [-h] [-i iterations] [-I interval] "
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"[-o offset] [-t] [-m mode]\n", name);
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puts("");
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printf(" -i: specify iteration counts (default: %"PRIu64")\n",
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TEST_HOST_LOOP_N);
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printf(" -I: specify interval in ms (default: %"PRIu64" ms)\n",
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TEST_HOST_LOOP_INTERVAL);
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printf(" -o: guest test memory offset (default: 0x%lx)\n",
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DEFAULT_GUEST_TEST_MEM);
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printf(" -t: map guest test memory at the top of the allowed "
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"physical address range\n");
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printf(" -m: specify the guest mode ID to test "
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"(default: test all supported modes)\n"
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" This option may be used multiple times.\n"
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@ -362,10 +388,11 @@ int main(int argc, char *argv[])
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unsigned long iterations = TEST_HOST_LOOP_N;
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unsigned long interval = TEST_HOST_LOOP_INTERVAL;
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bool mode_selected = false;
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bool top_offset = false;
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unsigned int mode;
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int opt, i;
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while ((opt = getopt(argc, argv, "hi:I:m:")) != -1) {
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while ((opt = getopt(argc, argv, "hi:I:o:tm:")) != -1) {
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switch (opt) {
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case 'i':
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iterations = strtol(optarg, NULL, 10);
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@ -373,6 +400,12 @@ int main(int argc, char *argv[])
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case 'I':
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interval = strtol(optarg, NULL, 10);
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break;
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case 'o':
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guest_test_mem = strtoull(optarg, NULL, 0);
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break;
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case 't':
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top_offset = true;
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break;
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case 'm':
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if (!mode_selected) {
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for (i = 0; i < NUM_VM_MODES; ++i)
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@ -393,6 +426,8 @@ int main(int argc, char *argv[])
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TEST_ASSERT(iterations > 2, "Iterations must be greater than two");
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TEST_ASSERT(interval > 0, "Interval must be greater than zero");
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TEST_ASSERT(!top_offset || guest_test_mem == DEFAULT_GUEST_TEST_MEM,
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"Cannot use both -o [offset] and -t at the same time");
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DEBUG("Test iterations: %"PRIu64", interval: %"PRIu64" (ms)\n",
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iterations, interval);
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@ -406,7 +441,7 @@ int main(int argc, char *argv[])
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"Guest mode ID %d (%s) not supported.",
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vm_guest_modes[i].mode,
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vm_guest_mode_string(vm_guest_modes[i].mode));
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run_test(vm_guest_modes[i].mode, iterations, interval);
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run_test(vm_guest_modes[i].mode, iterations, interval, top_offset);
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}
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return 0;
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