Commit dd50828e authored by Peter Xu's avatar Peter Xu Committed by wenzhiwei
Browse files

KVM: selftests: Introduce after_vcpu_run hook for dirty log test 

mainline inclusion
from mainline-v5.11-rc1
commit 60f644fb
category: performance
bugzilla: https://gitee.com/openeuler/kernel/issues/I9BPVF
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.11.y&id=60f644fb519831edff38c79755f7970c475e2ece



--------------------------------

Provide a hook for the checks after vcpu_run() completes.  Preparation
for the dirty ring test because we'll need to take care of another
exit reason.

Reviewed-by: default avatarAndrew Jones <drjones@redhat.com>
Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Message-Id: <20201001012235.6063-1-peterx@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent a4a35ced

tools/testing/selftests/kvm/dirty_log_test.c

+24 −12
Original line number Diff line number Diff line
@@ -178,6 +178,15 @@ static void clear_log_collect_dirty_pages(struct kvm_vm *vm, int slot, 
	kvm_vm_clear_dirty_log(vm, slot, bitmap, 0, num_pages);

}



static void default_after_vcpu_run(struct kvm_vm *vm)

{

	struct kvm_run *run = vcpu_state(vm, VCPU_ID);



	TEST_ASSERT(get_ucall(vm, VCPU_ID, NULL) == UCALL_SYNC,

		    "Invalid guest sync status: exit_reason=%s\n",

		    exit_reason_str(run->exit_reason));

}



struct log_mode {

	const char *name;

	/* Return true if this mode is supported, otherwise false */
@@ -187,16 +196,20 @@ struct log_mode { 
	/* Hook to collect the dirty pages into the bitmap provided */

	void (*collect_dirty_pages) (struct kvm_vm *vm, int slot,

				     void *bitmap, uint32_t num_pages);

	/* Hook to call when after each vcpu run */

	void (*after_vcpu_run)(struct kvm_vm *vm);

} log_modes[LOG_MODE_NUM] = {

	{

		.name = "dirty-log",

		.collect_dirty_pages = dirty_log_collect_dirty_pages,

		.after_vcpu_run = default_after_vcpu_run,

	},

	{

		.name = "clear-log",

		.supported = clear_log_supported,

		.create_vm_done = clear_log_create_vm_done,

		.collect_dirty_pages = clear_log_collect_dirty_pages,

		.after_vcpu_run = default_after_vcpu_run,

	},

};
@@ -247,6 +260,14 @@ static void log_mode_collect_dirty_pages(struct kvm_vm *vm, int slot, 
	mode->collect_dirty_pages(vm, slot, bitmap, num_pages);

}



static void log_mode_after_vcpu_run(struct kvm_vm *vm)

{

	struct log_mode *mode = &log_modes[host_log_mode];



	if (mode->after_vcpu_run)

		mode->after_vcpu_run(vm);

}



static void generate_random_array(uint64_t *guest_array, uint64_t size)

{

	uint64_t i;
@@ -261,25 +282,16 @@ static void *vcpu_worker(void *data) 
	struct kvm_vm *vm = data;

	uint64_t *guest_array;

	uint64_t pages_count = 0;

	struct kvm_run *run;



	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)) {

		generate_random_array(guest_array, TEST_PAGES_PER_LOOP);

		pages_count += TEST_PAGES_PER_LOOP;

		/* Let the guest dirty the random pages */

		ret = _vcpu_run(vm, VCPU_ID);

		TEST_ASSERT(ret == 0, "vcpu_run failed: %d\n", ret);

		if (get_ucall(vm, VCPU_ID, NULL) == UCALL_SYNC) {

			pages_count += TEST_PAGES_PER_LOOP;

			generate_random_array(guest_array, TEST_PAGES_PER_LOOP);

		} else {

			TEST_FAIL("Invalid guest sync status: "

				  "exit_reason=%s\n",

				  exit_reason_str(run->exit_reason));

		}

		log_mode_after_vcpu_run(vm);

	}



	pr_info("Dirtied %"PRIu64" pages\n", pages_count);