aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--tools/testing/selftests/kvm/.gitignore2
-rw-r--r--tools/testing/selftests/kvm/Makefile5
-rw-r--r--tools/testing/selftests/kvm/dirty_log_test.c (renamed from tools/testing/selftests/kvm/x86_64/dirty_log_test.c)163
3 files changed, 90 insertions, 80 deletions
diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore
index e0aa5411cf9b..552b0d9a49f4 100644
--- a/tools/testing/selftests/kvm/.gitignore
+++ b/tools/testing/selftests/kvm/.gitignore
@@ -4,4 +4,4 @@
/x86_64/sync_regs_test
/x86_64/vmx_tsc_adjust_test
/x86_64/state_test
-/x86_64/dirty_log_test
+/dirty_log_test
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 959be146f789..5e23f97ec46f 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -5,6 +5,7 @@ UNAME_M := $(shell uname -m)
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
@@ -12,7 +13,9 @@ TEST_GEN_PROGS_x86_64 += x86_64/sync_regs_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))
diff --git a/tools/testing/selftests/kvm/x86_64/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index 395a6e07d37c..d90f1091f687 100644
--- a/tools/testing/selftests/kvm/x86_64/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -17,75 +17,75 @@
#include "kvm_util.h"
#include "processor.h"
-#define DEBUG printf
+#define DEBUG printf
+
+#define VCPU_ID 1
-#define VCPU_ID 1
/* The memory slot index to track dirty pages */
-#define TEST_MEM_SLOT_INDEX 1
+#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 */
+#define TEST_MEM_OFFSET (1ul << 30) /* 1G */
+
/* Size of the testing memory slot */
-#define TEST_MEM_PAGES (1ULL << 18) /* 1G for 4K pages */
+#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
+#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
+#define TEST_HOST_LOOP_N 32
+
/* Interval for each host loop (ms) */
-#define TEST_HOST_LOOP_INTERVAL 10
+#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.
+ * 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.
*/
-uint64_t guest_random_array[TEST_PAGES_PER_LOOP];
-uint64_t guest_iteration;
-uint64_t guest_page_size;
+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;
/*
- * Writes to the first byte of a random page within the testing memory
- * region continuously.
+ * Continuously write to the first 8 bytes of a random pages within
+ * the testing memory region.
*/
-void guest_code(void)
+static void guest_code(void)
{
- int i = 0;
- uint64_t volatile *array = guest_random_array;
- uint64_t volatile *guest_addr;
+ int i;
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;
+ 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. These variables should only be used by the host
- * rather than the guest.
- */
-bool host_quit;
+/* Host variables */
+static bool host_quit;
/* Points to the test VM memory region on which we track dirty logs */
-void *host_test_mem;
+static void *host_test_mem;
+static uint64_t host_num_pages;
/* For statistics only */
-uint64_t host_dirty_count;
-uint64_t host_clear_count;
-uint64_t host_track_next_count;
+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
@@ -94,39 +94,34 @@ uint64_t host_track_next_count;
* 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;
+static unsigned long *host_bmap_track;
-void generate_random_array(uint64_t *guest_array, uint64_t size)
+static void generate_random_array(uint64_t *guest_array, uint64_t size)
{
uint64_t i;
- for (i = 0; i < size; i++) {
+ for (i = 0; i < size; i++)
guest_array[i] = random();
- }
}
-void *vcpu_worker(void *data)
+static void *vcpu_worker(void *data)
{
int ret;
- uint64_t loops, *guest_array, pages_count = 0;
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);
- /* Retrieve the guest random array pointer and cache it */
- guest_array = addr_gva2hva(vm, (vm_vaddr_t)guest_random_array);
-
- DEBUG("VCPU starts\n");
-
+ 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 to dirty these random pages */
+ /* Let the guest dirty the random pages */
ret = _vcpu_run(vm, VCPU_ID);
- if (run->exit_reason == KVM_EXIT_IO &&
- get_ucall(vm, VCPU_ID, &uc) == UCALL_SYNC) {
+ 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 {
@@ -137,18 +132,18 @@ void *vcpu_worker(void *data)
}
}
- DEBUG("VCPU exits, dirtied %"PRIu64" pages\n", pages_count);
+ DEBUG("Dirtied %"PRIu64" pages\n", pages_count);
return NULL;
}
-void vm_dirty_log_verify(unsigned long *bmap, uint64_t iteration)
+static void vm_dirty_log_verify(unsigned long *bmap)
{
uint64_t page;
- uint64_t volatile *value_ptr;
+ uint64_t *value_ptr;
- for (page = 0; page < TEST_MEM_PAGES; page++) {
- value_ptr = host_test_mem + page * getpagesize();
+ 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)) {
@@ -208,7 +203,7 @@ void vm_dirty_log_verify(unsigned long *bmap, uint64_t iteration)
}
}
-void help(char *name)
+static void help(char *name)
{
puts("");
printf("usage: %s [-i iterations] [-I interval] [-h]\n", name);
@@ -225,9 +220,9 @@ 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;
+ 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) {
@@ -245,16 +240,21 @@ int main(int argc, char *argv[])
}
}
- TEST_ASSERT(iterations > 2, "Iteration must be bigger than zero\n");
- TEST_ASSERT(interval > 0, "Interval must be bigger than zero");
+ 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));
- bmap = bitmap_alloc(TEST_MEM_PAGES);
- host_bmap_track = bitmap_alloc(TEST_MEM_PAGES);
+ 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);
@@ -264,32 +264,38 @@ int main(int argc, char *argv[])
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);
+ 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 size on the system */
- psize = addr_gva2hva(vm, (vm_vaddr_t)&guest_page_size);
- *psize = getpagesize();
+ /* 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 = addr_gva2hva(vm, (vm_vaddr_t)&guest_iteration);
- *iteration = 1;
+ iteration = 1;
+ sync_global_to_guest(vm, iteration);
- /* Start dirtying pages */
pthread_create(&vcpu_thread, NULL, vcpu_worker, vm);
- while (*iteration < iterations) {
+ 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)++;
+ vm_dirty_log_verify(bmap);
+ iteration++;
+ sync_global_to_guest(vm, iteration);
}
/* Tell the vcpu thread to quit */
@@ -302,6 +308,7 @@ int main(int argc, char *argv[])
free(bmap);
free(host_bmap_track);
+ ucall_uninit(vm);
kvm_vm_free(vm);
return 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.