1 files changed, 0 insertions, 173 deletions
diff --git a/tools/testing/selftests/vm/hugepage-mremap.c b/tools/testing/selftests/vm/hugepage-mremap.c
deleted file mode 100644
index 2a7c33631a29..000000000000
--- a/tools/testing/selftests/vm/hugepage-mremap.c
+++ /dev/null
@@ -1,173 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * hugepage-mremap:
- *
- * Example of remapping huge page memory in a user application using the
- * mremap system call.  Code assumes a hugetlbfs filesystem is mounted
- * at './huge'.  The amount of memory used by this test is decided by a command
- * line argument in MBs. If missing, the default amount is 10MB.
- *
- * To make sure the test triggers pmd sharing and goes through the 'unshare'
- * path in the mremap code use 1GB (1024) or more.
- */
-
-#define _GNU_SOURCE
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <errno.h>
-#include <fcntl.h> /* Definition of O_* constants */
-#include <sys/syscall.h> /* Definition of SYS_* constants */
-#include <linux/userfaultfd.h>
-#include <sys/ioctl.h>
-
-#define DEFAULT_LENGTH_MB 10UL
-#define MB_TO_BYTES(x) (x * 1024 * 1024)
-
-#define FILE_NAME "huge/hugepagefile"
-#define PROTECTION (PROT_READ | PROT_WRITE | PROT_EXEC)
-#define FLAGS (MAP_SHARED | MAP_ANONYMOUS)
-
-static void check_bytes(char *addr)
-{
-	printf("First hex is %x\n", *((unsigned int *)addr));
-}
-
-static void write_bytes(char *addr, size_t len)
-{
-	unsigned long i;
-
-	for (i = 0; i < len; i++)
-		*(addr + i) = (char)i;
-}
-
-static int read_bytes(char *addr, size_t len)
-{
-	unsigned long i;
-
-	check_bytes(addr);
-	for (i = 0; i < len; i++)
-		if (*(addr + i) != (char)i) {
-			printf("Mismatch at %lu\n", i);
-			return 1;
-		}
-	return 0;
-}
-
-static void register_region_with_uffd(char *addr, size_t len)
-{
-	long uffd; /* userfaultfd file descriptor */
-	struct uffdio_api uffdio_api;
-	struct uffdio_register uffdio_register;
-
-	/* Create and enable userfaultfd object. */
-
-	uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
-	if (uffd == -1) {
-		perror("userfaultfd");
-		exit(1);
-	}
-
-	uffdio_api.api = UFFD_API;
-	uffdio_api.features = 0;
-	if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) {
-		perror("ioctl-UFFDIO_API");
-		exit(1);
-	}
-
-	/* Create a private anonymous mapping. The memory will be
-	 * demand-zero paged--that is, not yet allocated. When we
-	 * actually touch the memory, it will be allocated via
-	 * the userfaultfd.
-	 */
-
-	addr = mmap(NULL, len, PROT_READ | PROT_WRITE,
-		    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-	if (addr == MAP_FAILED) {
-		perror("mmap");
-		exit(1);
-	}
-
-	printf("Address returned by mmap() = %p\n", addr);
-
-	/* Register the memory range of the mapping we just created for
-	 * handling by the userfaultfd object. In mode, we request to track
-	 * missing pages (i.e., pages that have not yet been faulted in).
-	 */
-
-	uffdio_register.range.start = (unsigned long)addr;
-	uffdio_register.range.len = len;
-	uffdio_register.mode = UFFDIO_REGISTER_MODE_MISSING;
-	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register) == -1) {
-		perror("ioctl-UFFDIO_REGISTER");
-		exit(1);
-	}
-}
-
-int main(int argc, char *argv[])
-{
-	/* Read memory length as the first arg if valid, otherwise fallback to
-	 * the default length. Any additional args are ignored.
-	 */
-	size_t length = argc > 1 ? (size_t)atoi(argv[1]) : 0UL;
-
-	length = length > 0 ? length : DEFAULT_LENGTH_MB;
-	length = MB_TO_BYTES(length);
-
-	int ret = 0;
-
-	int fd = open(FILE_NAME, O_CREAT | O_RDWR, 0755);
-
-	if (fd < 0) {
-		perror("Open failed");
-		exit(1);
-	}
-
-	/* mmap to a PUD aligned address to hopefully trigger pmd sharing. */
-	unsigned long suggested_addr = 0x7eaa40000000;
-	void *haddr = mmap((void *)suggested_addr, length, PROTECTION,
-			   MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);
-	printf("Map haddr: Returned address is %p\n", haddr);
-	if (haddr == MAP_FAILED) {
-		perror("mmap1");
-		exit(1);
-	}
-
-	/* mmap again to a dummy address to hopefully trigger pmd sharing. */
-	suggested_addr = 0x7daa40000000;
-	void *daddr = mmap((void *)suggested_addr, length, PROTECTION,
-			   MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);
-	printf("Map daddr: Returned address is %p\n", daddr);
-	if (daddr == MAP_FAILED) {
-		perror("mmap3");
-		exit(1);
-	}
-
-	suggested_addr = 0x7faa40000000;
-	void *vaddr =
-		mmap((void *)suggested_addr, length, PROTECTION, FLAGS, -1, 0);
-	printf("Map vaddr: Returned address is %p\n", vaddr);
-	if (vaddr == MAP_FAILED) {
-		perror("mmap2");
-		exit(1);
-	}
-
-	register_region_with_uffd(haddr, length);
-
-	void *addr = mremap(haddr, length, length,
-			    MREMAP_MAYMOVE | MREMAP_FIXED, vaddr);
-	if (addr == MAP_FAILED) {
-		perror("mremap");
-		exit(1);
-	}
-
-	printf("Mremap: Returned address is %p\n", addr);
-	check_bytes(addr);
-	write_bytes(addr, length);
-	ret = read_bytes(addr, length);
-
-	munmap(addr, length);
-
-	return ret;
-}