1 files changed, 0 insertions, 289 deletions
diff --git a/tools/testing/selftests/kvm/max_guest_memory_test.c b/tools/testing/selftests/kvm/max_guest_memory_test.c
deleted file mode 100644
index 0b9678858b6d..000000000000
--- a/tools/testing/selftests/kvm/max_guest_memory_test.c
+++ /dev/null
@@ -1,289 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <stdio.h>
-#include <stdlib.h>
-#include <pthread.h>
-#include <semaphore.h>
-#include <sys/types.h>
-#include <signal.h>
-#include <errno.h>
-#include <linux/bitmap.h>
-#include <linux/bitops.h>
-#include <linux/atomic.h>
-#include <linux/sizes.h>
-
-#include "kvm_util.h"
-#include "test_util.h"
-#include "guest_modes.h"
-#include "processor.h"
-
-static void guest_code(uint64_t start_gpa, uint64_t end_gpa, uint64_t stride)
-{
-	uint64_t gpa;
-
-	for (;;) {
-		for (gpa = start_gpa; gpa < end_gpa; gpa += stride)
-			*((volatile uint64_t *)gpa) = gpa;
-		GUEST_SYNC(0);
-	}
-}
-
-struct vcpu_info {
-	struct kvm_vcpu *vcpu;
-	uint64_t start_gpa;
-	uint64_t end_gpa;
-};
-
-static int nr_vcpus;
-static atomic_t rendezvous;
-
-static void rendezvous_with_boss(void)
-{
-	int orig = atomic_read(&rendezvous);
-
-	if (orig > 0) {
-		atomic_dec_and_test(&rendezvous);
-		while (atomic_read(&rendezvous) > 0)
-			cpu_relax();
-	} else {
-		atomic_inc(&rendezvous);
-		while (atomic_read(&rendezvous) < 0)
-			cpu_relax();
-	}
-}
-
-static void run_vcpu(struct kvm_vcpu *vcpu)
-{
-	vcpu_run(vcpu);
-	TEST_ASSERT_EQ(get_ucall(vcpu, NULL), UCALL_SYNC);
-}
-
-static void *vcpu_worker(void *data)
-{
-	struct vcpu_info *info = data;
-	struct kvm_vcpu *vcpu = info->vcpu;
-	struct kvm_vm *vm = vcpu->vm;
-	struct kvm_sregs sregs;
-
-	vcpu_args_set(vcpu, 3, info->start_gpa, info->end_gpa, vm->page_size);
-
-	rendezvous_with_boss();
-
-	run_vcpu(vcpu);
-	rendezvous_with_boss();
-	vcpu_sregs_get(vcpu, &sregs);
-#ifdef __x86_64__
-	/* Toggle CR0.WP to trigger a MMU context reset. */
-	sregs.cr0 ^= X86_CR0_WP;
-#endif
-	vcpu_sregs_set(vcpu, &sregs);
-	rendezvous_with_boss();
-
-	run_vcpu(vcpu);
-	rendezvous_with_boss();
-
-	return NULL;
-}
-
-static pthread_t *spawn_workers(struct kvm_vm *vm, struct kvm_vcpu **vcpus,
-				uint64_t start_gpa, uint64_t end_gpa)
-{
-	struct vcpu_info *info;
-	uint64_t gpa, nr_bytes;
-	pthread_t *threads;
-	int i;
-
-	threads = malloc(nr_vcpus * sizeof(*threads));
-	TEST_ASSERT(threads, "Failed to allocate vCPU threads");
-
-	info = malloc(nr_vcpus * sizeof(*info));
-	TEST_ASSERT(info, "Failed to allocate vCPU gpa ranges");
-
-	nr_bytes = ((end_gpa - start_gpa) / nr_vcpus) &
-			~((uint64_t)vm->page_size - 1);
-	TEST_ASSERT(nr_bytes, "C'mon, no way you have %d CPUs", nr_vcpus);
-
-	for (i = 0, gpa = start_gpa; i < nr_vcpus; i++, gpa += nr_bytes) {
-		info[i].vcpu = vcpus[i];
-		info[i].start_gpa = gpa;
-		info[i].end_gpa = gpa + nr_bytes;
-		pthread_create(&threads[i], NULL, vcpu_worker, &info[i]);
-	}
-	return threads;
-}
-
-static void rendezvous_with_vcpus(struct timespec *time, const char *name)
-{
-	int i, rendezvoused;
-
-	pr_info("Waiting for vCPUs to finish %s...\n", name);
-
-	rendezvoused = atomic_read(&rendezvous);
-	for (i = 0; abs(rendezvoused) != 1; i++) {
-		usleep(100);
-		if (!(i & 0x3f))
-			pr_info("\r%d vCPUs haven't rendezvoused...",
-				abs(rendezvoused) - 1);
-		rendezvoused = atomic_read(&rendezvous);
-	}
-
-	clock_gettime(CLOCK_MONOTONIC, time);
-
-	/* Release the vCPUs after getting the time of the previous action. */
-	pr_info("\rAll vCPUs finished %s, releasing...\n", name);
-	if (rendezvoused > 0)
-		atomic_set(&rendezvous, -nr_vcpus - 1);
-	else
-		atomic_set(&rendezvous, nr_vcpus + 1);
-}
-
-static void calc_default_nr_vcpus(void)
-{
-	cpu_set_t possible_mask;
-	int r;
-
-	r = sched_getaffinity(0, sizeof(possible_mask), &possible_mask);
-	TEST_ASSERT(!r, "sched_getaffinity failed, errno = %d (%s)",
-		    errno, strerror(errno));
-
-	nr_vcpus = CPU_COUNT(&possible_mask) * 3/4;
-	TEST_ASSERT(nr_vcpus > 0, "Uh, no CPUs?");
-}
-
-int main(int argc, char *argv[])
-{
-	/*
-	 * Skip the first 4gb and slot0.  slot0 maps <1gb and is used to back
-	 * the guest's code, stack, and page tables.  Because selftests creates
-	 * an IRQCHIP, a.k.a. a local APIC, KVM creates an internal memslot
-	 * just below the 4gb boundary.  This test could create memory at
-	 * 1gb-3gb,but it's simpler to skip straight to 4gb.
-	 */
-	const uint64_t start_gpa = SZ_4G;
-	const int first_slot = 1;
-
-	struct timespec time_start, time_run1, time_reset, time_run2;
-	uint64_t max_gpa, gpa, slot_size, max_mem, i;
-	int max_slots, slot, opt, fd;
-	bool hugepages = false;
-	struct kvm_vcpu **vcpus;
-	pthread_t *threads;
-	struct kvm_vm *vm;
-	void *mem;
-
-	/*
-	 * Default to 2gb so that maxing out systems with MAXPHADDR=46, which
-	 * are quite common for x86, requires changing only max_mem (KVM allows
-	 * 32k memslots, 32k * 2gb == ~64tb of guest memory).
-	 */
-	slot_size = SZ_2G;
-
-	max_slots = kvm_check_cap(KVM_CAP_NR_MEMSLOTS);
-	TEST_ASSERT(max_slots > first_slot, "KVM is broken");
-
-	/* All KVM MMUs should be able to survive a 128gb guest. */
-	max_mem = 128ull * SZ_1G;
-
-	calc_default_nr_vcpus();
-
-	while ((opt = getopt(argc, argv, "c:h:m:s:H")) != -1) {
-		switch (opt) {
-		case 'c':
-			nr_vcpus = atoi_positive("Number of vCPUs", optarg);
-			break;
-		case 'm':
-			max_mem = 1ull * atoi_positive("Memory size", optarg) * SZ_1G;
-			break;
-		case 's':
-			slot_size = 1ull * atoi_positive("Slot size", optarg) * SZ_1G;
-			break;
-		case 'H':
-			hugepages = true;
-			break;
-		case 'h':
-		default:
-			printf("usage: %s [-c nr_vcpus] [-m max_mem_in_gb] [-s slot_size_in_gb] [-H]\n", argv[0]);
-			exit(1);
-		}
-	}
-
-	vcpus = malloc(nr_vcpus * sizeof(*vcpus));
-	TEST_ASSERT(vcpus, "Failed to allocate vCPU array");
-
-	vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);
-
-	max_gpa = vm->max_gfn << vm->page_shift;
-	TEST_ASSERT(max_gpa > (4 * slot_size), "MAXPHYADDR <4gb ");
-
-	fd = kvm_memfd_alloc(slot_size, hugepages);
-	mem = mmap(NULL, slot_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-	TEST_ASSERT(mem != MAP_FAILED, "mmap() failed");
-
-	TEST_ASSERT(!madvise(mem, slot_size, MADV_NOHUGEPAGE), "madvise() failed");
-
-	/* Pre-fault the memory to avoid taking mmap_sem on guest page faults. */
-	for (i = 0; i < slot_size; i += vm->page_size)
-		((uint8_t *)mem)[i] = 0xaa;
-
-	gpa = 0;
-	for (slot = first_slot; slot < max_slots; slot++) {
-		gpa = start_gpa + ((slot - first_slot) * slot_size);
-		if (gpa + slot_size > max_gpa)
-			break;
-
-		if ((gpa - start_gpa) >= max_mem)
-			break;
-
-		vm_set_user_memory_region(vm, slot, 0, gpa, slot_size, mem);
-
-#ifdef __x86_64__
-		/* Identity map memory in the guest using 1gb pages. */
-		for (i = 0; i < slot_size; i += SZ_1G)
-			__virt_pg_map(vm, gpa + i, gpa + i, PG_LEVEL_1G);
-#else
-		for (i = 0; i < slot_size; i += vm->page_size)
-			virt_pg_map(vm, gpa + i, gpa + i);
-#endif
-	}
-
-	atomic_set(&rendezvous, nr_vcpus + 1);
-	threads = spawn_workers(vm, vcpus, start_gpa, gpa);
-
-	free(vcpus);
-	vcpus = NULL;
-
-	pr_info("Running with %lugb of guest memory and %u vCPUs\n",
-		(gpa - start_gpa) / SZ_1G, nr_vcpus);
-
-	rendezvous_with_vcpus(&time_start, "spawning");
-	rendezvous_with_vcpus(&time_run1, "run 1");
-	rendezvous_with_vcpus(&time_reset, "reset");
-	rendezvous_with_vcpus(&time_run2, "run 2");
-
-	time_run2  = timespec_sub(time_run2,   time_reset);
-	time_reset = timespec_sub(time_reset, time_run1);
-	time_run1  = timespec_sub(time_run1,   time_start);
-
-	pr_info("run1 = %ld.%.9lds, reset = %ld.%.9lds, run2 =  %ld.%.9lds\n",
-		time_run1.tv_sec, time_run1.tv_nsec,
-		time_reset.tv_sec, time_reset.tv_nsec,
-		time_run2.tv_sec, time_run2.tv_nsec);
-
-	/*
-	 * Delete even numbered slots (arbitrary) and unmap the first half of
-	 * the backing (also arbitrary) to verify KVM correctly drops all
-	 * references to the removed regions.
-	 */
-	for (slot = (slot - 1) & ~1ull; slot >= first_slot; slot -= 2)
-		vm_set_user_memory_region(vm, slot, 0, 0, 0, NULL);
-
-	munmap(mem, slot_size / 2);
-
-	/* Sanity check that the vCPUs actually ran. */
-	for (i = 0; i < nr_vcpus; i++)
-		pthread_join(threads[i], NULL);
-
-	/*
-	 * Deliberately exit without deleting the remaining memslots or closing
-	 * kvm_fd to test cleanup via mmu_notifier.release.
-	 */
-}