@@ -26,11 +26,8 @@
/* 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 */
+/* Default guest test memory offset, 1G */
+#define DEFAULT_GUEST_TEST_MEM 0x40000000
/* How many pages to dirty for each guest loop */
#define TEST_PAGES_PER_LOOP 1024
@@ -53,6 +50,12 @@ static uint64_t guest_num_pages;
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.
+ */
+static uint64_t guest_test_mem = DEFAULT_GUEST_TEST_MEM;
+
/*
* Continuously write to the first 8 bytes of a random pages within
* the testing memory region.
@@ -63,7 +66,7 @@ static void guest_code(void)
while (true) {
for (i = 0; i < TEST_PAGES_PER_LOOP; i++) {
- uint64_t addr = TEST_MEM_OFFSET;
+ uint64_t addr = guest_test_mem;
addr += (READ_ONCE(random_array[i]) % guest_num_pages)
* guest_page_size;
addr &= ~(host_page_size - 1);
@@ -221,20 +224,29 @@ 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)
+ unsigned long interval, bool top_offset)
{
- unsigned int guest_page_shift;
+ unsigned int guest_pa_bits, guest_page_shift;
pthread_t vcpu_thread;
struct kvm_vm *vm;
+ uint64_t max_gfn;
unsigned long *bmap;
switch (mode) {
case VM_MODE_P52V48_4K:
- case VM_MODE_P40V48_4K:
+ guest_pa_bits = 52;
guest_page_shift = 12;
break;
case VM_MODE_P52V48_64K:
+ guest_pa_bits = 52;
+ guest_page_shift = 16;
+ break;
+ case VM_MODE_P40V48_4K:
+ guest_pa_bits = 40;
+ guest_page_shift = 12;
+ break;
case VM_MODE_P40V48_64K:
+ guest_pa_bits = 40;
guest_page_shift = 16;
break;
default:
@@ -243,6 +255,7 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
DEBUG("Testing guest mode: %s\n", vm_guest_mode_string(mode));
+ max_gfn = (1ul << (guest_pa_bits - guest_page_shift)) - 1;
guest_page_size = (1ul << guest_page_shift);
/* 1G of guest page sized pages */
guest_num_pages = (1ul << (30 - guest_page_shift));
@@ -250,6 +263,13 @@ 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);
+ }
+
+ DEBUG("guest test mem offset: 0x%lx\n", guest_test_mem);
+
bmap = bitmap_alloc(host_num_pages);
host_bmap_track = bitmap_alloc(host_num_pages);
@@ -257,17 +277,17 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
/* Add an extra memory slot for testing dirty logging */
vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
- TEST_MEM_OFFSET,
+ guest_test_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, TEST_MEM_OFFSET, TEST_MEM_OFFSET,
+ virt_map(vm, guest_test_mem, guest_test_mem,
guest_num_pages * guest_page_size, 0);
/* Cache the HVA pointer of the region */
- host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)TEST_MEM_OFFSET);
+ host_test_mem = addr_gpa2hva(vm, (vm_paddr_t)guest_test_mem);
#ifdef __x86_64__
vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
@@ -279,6 +299,7 @@ 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_num_pages);
/* Start the iterations */
@@ -337,12 +358,17 @@ static void help(char *name)
int i;
puts("");
- printf("usage: %s [-h] [-i iterations] [-I interval] [-m mode]\n", name);
+ printf("usage: %s [-h] [-i iterations] [-I interval] "
+ "[-o offset] [-t] [-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(" -m: specify the guest mode ID to test "
"(default: test all supported modes)\n"
" This option may be used multiple times.\n"
@@ -362,10 +388,11 @@ 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;
int opt, i;
- while ((opt = getopt(argc, argv, "hi:I:m:")) != -1) {
+ while ((opt = getopt(argc, argv, "hi:I:o:tm:")) != -1) {
switch (opt) {
case 'i':
iterations = strtol(optarg, NULL, 10);
@@ -373,6 +400,12 @@ 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;
+ break;
case 'm':
if (!mode_selected) {
for (i = 0; i < NUM_VM_MODES; ++i)
@@ -393,6 +426,8 @@ 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);
@@ -406,7 +441,7 @@ int main(int argc, char *argv[])
"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);
+ run_test(vm_guest_modes[i].mode, iterations, interval, top_offset);
}
return 0;
Signed-off-by: Andrew Jones <drjones@redhat.com> --- tools/testing/selftests/kvm/dirty_log_test.c | 65 +++++++++++++++----- 1 file changed, 50 insertions(+), 15 deletions(-)