acb9f95a7c
When HAX is enabled (--enable-hax), GCC 9.2.1 reports issues with
snprintf(). Replacing old snprintf() by g_strdup_printf() fixes the
problem with boundary checks of vm_id and vcpu_id and finally the
warnings produced by GCC.
For more details, one example of warning:
CC i386-softmmu/target/i386/hax-posix.o
qemu/target/i386/hax-posix.c: In function ‘hax_host_open_vm’:
qemu/target/i386/hax-posix.c:124:56: error: ‘%02d’ directive output may be
truncated writing between 2 and 11 bytes into a region of size 3
[-Werror=format-truncation=]
124 | snprintf(name, sizeof HAX_VM_DEVFS, "/dev/hax_vm/vm%02d", vm_id);
| ^~~~
qemu/target/i386/hax-posix.c:124:41: note: directive argument in the range
[-2147483648, 64]
124 | snprintf(name, sizeof HAX_VM_DEVFS, "/dev/hax_vm/vm%02d", vm_id);
| ^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:867,
from qemu/include/qemu/osdep.h:99,
from qemu/target/i386/hax-posix.c:14:
/usr/include/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output
between 17 and 26 bytes into a destination of size 17
67 | return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
68 | __bos (__s), __fmt, __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
466 lines
12 KiB
C
466 lines
12 KiB
C
/*
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* QEMU HAXM support
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*
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* Copyright (c) 2011 Intel Corporation
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* Written by:
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* Jiang Yunhong<yunhong.jiang@intel.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "hax-i386.h"
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/*
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* return 0 when success, -1 when driver not loaded,
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* other negative value for other failure
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*/
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static int hax_open_device(hax_fd *fd)
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{
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uint32_t errNum = 0;
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HANDLE hDevice;
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if (!fd) {
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return -2;
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}
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hDevice = CreateFile("\\\\.\\HAX",
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GENERIC_READ | GENERIC_WRITE,
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0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hDevice == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "Failed to open the HAX device!\n");
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errNum = GetLastError();
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if (errNum == ERROR_FILE_NOT_FOUND) {
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return -1;
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}
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return -2;
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}
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*fd = hDevice;
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return 0;
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}
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/* hax_fd hax_mod_open */
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hax_fd hax_mod_open(void)
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{
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int ret;
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hax_fd fd = NULL;
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ret = hax_open_device(&fd);
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if (ret != 0) {
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fprintf(stderr, "Open HAX device failed\n");
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}
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return fd;
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}
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int hax_populate_ram(uint64_t va, uint64_t size)
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{
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int ret;
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HANDLE hDeviceVM;
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DWORD dSize = 0;
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if (!hax_global.vm || !hax_global.vm->fd) {
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fprintf(stderr, "Allocate memory before vm create?\n");
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return -EINVAL;
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}
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hDeviceVM = hax_global.vm->fd;
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if (hax_global.supports_64bit_ramblock) {
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struct hax_ramblock_info ramblock = {
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.start_va = va,
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.size = size,
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.reserved = 0
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};
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ret = DeviceIoControl(hDeviceVM,
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HAX_VM_IOCTL_ADD_RAMBLOCK,
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&ramblock, sizeof(ramblock), NULL, 0, &dSize,
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(LPOVERLAPPED) NULL);
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} else {
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struct hax_alloc_ram_info info = {
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.size = (uint32_t) size,
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.pad = 0,
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.va = va
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};
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ret = DeviceIoControl(hDeviceVM,
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HAX_VM_IOCTL_ALLOC_RAM,
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&info, sizeof(info), NULL, 0, &dSize,
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(LPOVERLAPPED) NULL);
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}
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if (!ret) {
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fprintf(stderr, "Failed to register RAM block: va=0x%" PRIx64
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", size=0x%" PRIx64 ", method=%s\n", va, size,
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hax_global.supports_64bit_ramblock ? "new" : "legacy");
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return ret;
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}
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return 0;
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}
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int hax_set_ram(uint64_t start_pa, uint32_t size, uint64_t host_va, int flags)
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{
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struct hax_set_ram_info info;
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HANDLE hDeviceVM = hax_global.vm->fd;
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DWORD dSize = 0;
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int ret;
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info.pa_start = start_pa;
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info.size = size;
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info.va = host_va;
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info.flags = (uint8_t) flags;
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ret = DeviceIoControl(hDeviceVM, HAX_VM_IOCTL_SET_RAM,
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&info, sizeof(info), NULL, 0, &dSize,
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(LPOVERLAPPED) NULL);
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if (!ret) {
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return -EFAULT;
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} else {
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return 0;
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}
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}
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int hax_capability(struct hax_state *hax, struct hax_capabilityinfo *cap)
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{
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int ret;
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HANDLE hDevice = hax->fd; /* handle to hax module */
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DWORD dSize = 0;
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DWORD err = 0;
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if (hax_invalid_fd(hDevice)) {
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fprintf(stderr, "Invalid fd for hax device!\n");
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return -ENODEV;
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}
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ret = DeviceIoControl(hDevice, HAX_IOCTL_CAPABILITY, NULL, 0, cap,
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sizeof(*cap), &dSize, (LPOVERLAPPED) NULL);
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if (!ret) {
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err = GetLastError();
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if (err == ERROR_INSUFFICIENT_BUFFER || err == ERROR_MORE_DATA) {
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fprintf(stderr, "hax capability is too long to hold.\n");
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}
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fprintf(stderr, "Failed to get Hax capability:%luu\n", err);
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return -EFAULT;
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} else {
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return 0;
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}
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}
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int hax_mod_version(struct hax_state *hax, struct hax_module_version *version)
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{
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int ret;
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HANDLE hDevice = hax->fd; /* handle to hax module */
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DWORD dSize = 0;
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DWORD err = 0;
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if (hax_invalid_fd(hDevice)) {
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fprintf(stderr, "Invalid fd for hax device!\n");
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return -ENODEV;
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}
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ret = DeviceIoControl(hDevice,
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HAX_IOCTL_VERSION,
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NULL, 0,
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version, sizeof(*version), &dSize,
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(LPOVERLAPPED) NULL);
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if (!ret) {
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err = GetLastError();
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if (err == ERROR_INSUFFICIENT_BUFFER || err == ERROR_MORE_DATA) {
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fprintf(stderr, "hax module verion is too long to hold.\n");
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}
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fprintf(stderr, "Failed to get Hax module version:%lu\n", err);
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return -EFAULT;
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} else {
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return 0;
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}
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}
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static char *hax_vm_devfs_string(int vm_id)
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{
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return g_strdup_printf("/dev/hax_vm/vm%02d", vm_id);
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}
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static char *hax_vcpu_devfs_string(int vm_id, int vcpu_id)
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{
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return g_strdup_printf("/dev/hax_vm%02d/vcpu%02d", vm_id, vcpu_id);
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}
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int hax_host_create_vm(struct hax_state *hax, int *vmid)
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{
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int ret;
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int vm_id = 0;
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DWORD dSize = 0;
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if (hax_invalid_fd(hax->fd)) {
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return -EINVAL;
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}
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if (hax->vm) {
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return 0;
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}
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ret = DeviceIoControl(hax->fd,
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HAX_IOCTL_CREATE_VM,
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NULL, 0, &vm_id, sizeof(vm_id), &dSize,
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(LPOVERLAPPED) NULL);
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if (!ret) {
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fprintf(stderr, "Failed to create VM. Error code: %lu\n",
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GetLastError());
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return -1;
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}
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*vmid = vm_id;
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return 0;
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}
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hax_fd hax_host_open_vm(struct hax_state *hax, int vm_id)
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{
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char *vm_name = NULL;
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hax_fd hDeviceVM;
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vm_name = hax_vm_devfs_string(vm_id);
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if (!vm_name) {
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fprintf(stderr, "Failed to open VM. VM name is null\n");
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return INVALID_HANDLE_VALUE;
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}
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hDeviceVM = CreateFile(vm_name,
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GENERIC_READ | GENERIC_WRITE,
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0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hDeviceVM == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "Open the vm device error:%s, ec:%lu\n",
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vm_name, GetLastError());
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}
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g_free(vm_name);
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return hDeviceVM;
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}
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int hax_notify_qemu_version(hax_fd vm_fd, struct hax_qemu_version *qversion)
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{
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int ret;
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DWORD dSize = 0;
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if (hax_invalid_fd(vm_fd)) {
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return -EINVAL;
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}
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ret = DeviceIoControl(vm_fd,
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HAX_VM_IOCTL_NOTIFY_QEMU_VERSION,
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qversion, sizeof(struct hax_qemu_version),
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NULL, 0, &dSize, (LPOVERLAPPED) NULL);
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if (!ret) {
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fprintf(stderr, "Failed to notify qemu API version\n");
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return -1;
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}
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return 0;
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}
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int hax_host_create_vcpu(hax_fd vm_fd, int vcpuid)
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{
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int ret;
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DWORD dSize = 0;
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ret = DeviceIoControl(vm_fd,
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HAX_VM_IOCTL_VCPU_CREATE,
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&vcpuid, sizeof(vcpuid), NULL, 0, &dSize,
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(LPOVERLAPPED) NULL);
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if (!ret) {
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fprintf(stderr, "Failed to create vcpu %x\n", vcpuid);
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return -1;
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}
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return 0;
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}
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hax_fd hax_host_open_vcpu(int vmid, int vcpuid)
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{
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char *devfs_path = NULL;
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hax_fd hDeviceVCPU;
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devfs_path = hax_vcpu_devfs_string(vmid, vcpuid);
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if (!devfs_path) {
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fprintf(stderr, "Failed to get the devfs\n");
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return INVALID_HANDLE_VALUE;
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}
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hDeviceVCPU = CreateFile(devfs_path,
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GENERIC_READ | GENERIC_WRITE,
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0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
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NULL);
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if (hDeviceVCPU == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "Failed to open the vcpu devfs\n");
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}
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g_free(devfs_path);
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return hDeviceVCPU;
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}
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int hax_host_setup_vcpu_channel(struct hax_vcpu_state *vcpu)
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{
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hax_fd hDeviceVCPU = vcpu->fd;
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int ret;
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struct hax_tunnel_info info;
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DWORD dSize = 0;
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_IOCTL_SETUP_TUNNEL,
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NULL, 0, &info, sizeof(info), &dSize,
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(LPOVERLAPPED) NULL);
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if (!ret) {
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fprintf(stderr, "Failed to setup the hax tunnel\n");
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return -1;
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}
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if (!valid_hax_tunnel_size(info.size)) {
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fprintf(stderr, "Invalid hax tunnel size %x\n", info.size);
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ret = -EINVAL;
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return ret;
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}
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vcpu->tunnel = (struct hax_tunnel *) (intptr_t) (info.va);
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vcpu->iobuf = (unsigned char *) (intptr_t) (info.io_va);
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return 0;
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}
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int hax_vcpu_run(struct hax_vcpu_state *vcpu)
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{
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int ret;
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HANDLE hDeviceVCPU = vcpu->fd;
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DWORD dSize = 0;
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_IOCTL_RUN,
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NULL, 0, NULL, 0, &dSize, (LPOVERLAPPED) NULL);
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if (!ret) {
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return -EFAULT;
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} else {
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return 0;
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}
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}
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int hax_sync_fpu(CPUArchState *env, struct fx_layout *fl, int set)
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{
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int ret;
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hax_fd fd;
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HANDLE hDeviceVCPU;
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DWORD dSize = 0;
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fd = hax_vcpu_get_fd(env);
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if (hax_invalid_fd(fd)) {
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return -1;
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}
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hDeviceVCPU = fd;
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if (set) {
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_IOCTL_SET_FPU,
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fl, sizeof(*fl), NULL, 0, &dSize,
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(LPOVERLAPPED) NULL);
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} else {
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_IOCTL_GET_FPU,
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NULL, 0, fl, sizeof(*fl), &dSize,
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(LPOVERLAPPED) NULL);
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}
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if (!ret) {
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return -EFAULT;
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} else {
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return 0;
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}
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}
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int hax_sync_msr(CPUArchState *env, struct hax_msr_data *msrs, int set)
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{
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int ret;
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hax_fd fd;
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HANDLE hDeviceVCPU;
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DWORD dSize = 0;
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fd = hax_vcpu_get_fd(env);
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if (hax_invalid_fd(fd)) {
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return -1;
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}
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hDeviceVCPU = fd;
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if (set) {
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_IOCTL_SET_MSRS,
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msrs, sizeof(*msrs),
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msrs, sizeof(*msrs), &dSize, (LPOVERLAPPED) NULL);
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} else {
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_IOCTL_GET_MSRS,
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msrs, sizeof(*msrs),
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msrs, sizeof(*msrs), &dSize, (LPOVERLAPPED) NULL);
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}
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if (!ret) {
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return -EFAULT;
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} else {
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return 0;
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}
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}
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int hax_sync_vcpu_state(CPUArchState *env, struct vcpu_state_t *state, int set)
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{
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int ret;
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hax_fd fd;
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HANDLE hDeviceVCPU;
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DWORD dSize;
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fd = hax_vcpu_get_fd(env);
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if (hax_invalid_fd(fd)) {
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return -1;
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}
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hDeviceVCPU = fd;
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if (set) {
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_SET_REGS,
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state, sizeof(*state),
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NULL, 0, &dSize, (LPOVERLAPPED) NULL);
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} else {
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_GET_REGS,
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NULL, 0,
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state, sizeof(*state), &dSize,
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(LPOVERLAPPED) NULL);
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}
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if (!ret) {
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return -EFAULT;
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} else {
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return 0;
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}
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}
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int hax_inject_interrupt(CPUArchState *env, int vector)
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{
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int ret;
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hax_fd fd;
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HANDLE hDeviceVCPU;
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DWORD dSize;
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fd = hax_vcpu_get_fd(env);
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if (hax_invalid_fd(fd)) {
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return -1;
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}
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hDeviceVCPU = fd;
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ret = DeviceIoControl(hDeviceVCPU,
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HAX_VCPU_IOCTL_INTERRUPT,
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&vector, sizeof(vector), NULL, 0, &dSize,
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(LPOVERLAPPED) NULL);
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if (!ret) {
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return -EFAULT;
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} else {
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return 0;
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}
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}
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