#include <unistd.h>
#include "cpu.h"
+#if defined(USE_KQEMU)
+#include "vl.h"
+#endif
#if defined(__i386__) && !defined(CONFIG_SOFTMMU) && !defined(CONFIG_USER_ONLY)
#else
+#ifdef _WIN32
+#include <windows.h>
+#elif defined(_BSD)
+#include <stdlib.h>
+#else
#include <malloc.h>
+#endif
int qemu_write(int fd, const void *buf, size_t n)
{
return malloc(size);
}
+#if defined(_WIN32)
+
+void *qemu_vmalloc(size_t size)
+{
+ /* FIXME: this is not exactly optimal solution since VirtualAlloc
+ has 64Kb granularity, but at least it guarantees us that the
+ memory is page aligned. */
+ return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
+}
+
+void qemu_vfree(void *ptr)
+{
+ VirtualFree(ptr, 0, MEM_RELEASE);
+}
+
+#else
+
#if defined(USE_KQEMU)
+#include <sys/vfs.h>
#include <sys/mman.h>
#include <fcntl.h>
-void *qemu_vmalloc(size_t size)
+void *kqemu_vmalloc(size_t size)
{
static int phys_ram_fd = -1;
static int phys_ram_size = 0;
const char *tmpdir;
char phys_ram_file[1024];
void *ptr;
+ struct statfs stfs;
if (phys_ram_fd < 0) {
tmpdir = getenv("QEMU_TMPDIR");
if (!tmpdir)
tmpdir = "/dev/shm";
+ if (statfs(tmpdir, &stfs) == 0) {
+ int64_t free_space;
+ int ram_mb;
+
+ extern int ram_size;
+ free_space = (int64_t)stfs.f_bavail * stfs.f_bsize;
+ if ((ram_size + 8192 * 1024) >= free_space) {
+ ram_mb = (ram_size / (1024 * 1024));
+ fprintf(stderr,
+ "You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
+ tmpdir, ram_mb);
+ if (strcmp(tmpdir, "/dev/shm") == 0) {
+ fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
+ "umount /dev/shm\n"
+ "mount -t tmpfs -o size=%dm none /dev/shm\n",
+ ram_mb + 16);
+ } else {
+ fprintf(stderr,
+ "Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
+ "QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
+ "temporary RAM file will be opened.\n");
+ }
+ fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
+ exit(1);
+ }
+ }
snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
tmpdir);
if (mkstemp(phys_ram_file) < 0) {
return ptr;
}
-void qemu_vfree(void *ptr)
+void kqemu_vfree(void *ptr)
{
/* may be useful some day, but currently we do not need to free */
}
-#else
+#endif
/* alloc shared memory pages */
void *qemu_vmalloc(size_t size)
{
+#if defined(USE_KQEMU)
+ if (kqemu_allowed)
+ return kqemu_vmalloc(size);
+#endif
#ifdef _BSD
return valloc(size);
#else
void qemu_vfree(void *ptr)
{
+#if defined(USE_KQEMU)
+ if (kqemu_allowed)
+ kqemu_vfree(ptr);
+#endif
free(ptr);
}