* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
*/
#include <sys/mman.h>
#include "hw/pci.h"
+#include "hw/pc.h"
#include "hw/xen_common.h"
#include "hw/xen_backend.h"
+#include "range.h"
#include "xen-mapcache.h"
#include "trace.h"
+#include "exec-memory.h"
#include <xen/hvm/ioreq.h>
#include <xen/hvm/params.h>
+#include <xen/hvm/e820.h>
//#define DEBUG_XEN
do { } while (0)
#endif
+static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi;
+static MemoryRegion *framebuffer;
+
/* Compatibility with older version */
#if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
#define BUFFER_IO_MAX_DELAY 100
+typedef struct XenPhysmap {
+ target_phys_addr_t start_addr;
+ ram_addr_t size;
+ MemoryRegion *mr;
+ target_phys_addr_t phys_offset;
+
+ QLIST_ENTRY(XenPhysmap) list;
+} XenPhysmap;
+
typedef struct XenIOState {
shared_iopage_t *shared_page;
buffered_iopage_t *buffered_io_page;
int send_vcpu;
struct xs_handle *xenstore;
+ MemoryListener memory_listener;
+ QLIST_HEAD(, XenPhysmap) physmap;
+ target_phys_addr_t free_phys_offset;
+ const XenPhysmap *log_for_dirtybit;
Notifier exit;
+ Notifier suspend;
} XenIOState;
/* Xen specific function for piix pci */
}
}
+static void xen_suspend_notifier(Notifier *notifier, void *data)
+{
+ xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3);
+}
+
/* Xen Interrupt Controller */
static void xen_set_irq(void *opaque, int irq, int level)
static void xen_ram_init(ram_addr_t ram_size)
{
- RAMBlock *new_block;
+ MemoryRegion *sysmem = get_system_memory();
ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
+ ram_addr_t block_len;
- new_block = qemu_mallocz(sizeof (*new_block));
- pstrcpy(new_block->idstr, sizeof (new_block->idstr), "xen.ram");
- new_block->host = NULL;
- new_block->offset = 0;
- new_block->length = ram_size;
-
- QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next);
-
- ram_list.phys_dirty = qemu_realloc(ram_list.phys_dirty,
- new_block->length >> TARGET_PAGE_BITS);
- memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
- 0xff, new_block->length >> TARGET_PAGE_BITS);
+ block_len = ram_size;
+ if (ram_size >= HVM_BELOW_4G_RAM_END) {
+ /* Xen does not allocate the memory continuously, and keep a hole at
+ * HVM_BELOW_4G_MMIO_START of HVM_BELOW_4G_MMIO_LENGTH
+ */
+ block_len += HVM_BELOW_4G_MMIO_LENGTH;
+ }
+ memory_region_init_ram(&ram_memory, "xen.ram", block_len);
+ vmstate_register_ram_global(&ram_memory);
- if (ram_size >= 0xe0000000 ) {
- above_4g_mem_size = ram_size - 0xe0000000;
- below_4g_mem_size = 0xe0000000;
+ if (ram_size >= HVM_BELOW_4G_RAM_END) {
+ above_4g_mem_size = ram_size - HVM_BELOW_4G_RAM_END;
+ below_4g_mem_size = HVM_BELOW_4G_RAM_END;
} else {
below_4g_mem_size = ram_size;
}
- cpu_register_physical_memory(0, below_4g_mem_size, new_block->offset);
-#if TARGET_PHYS_ADDR_BITS > 32
+ memory_region_init_alias(&ram_640k, "xen.ram.640k",
+ &ram_memory, 0, 0xa0000);
+ memory_region_add_subregion(sysmem, 0, &ram_640k);
+ /* Skip of the VGA IO memory space, it will be registered later by the VGA
+ * emulated device.
+ *
+ * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
+ * the Options ROM, so it is registered here as RAM.
+ */
+ memory_region_init_alias(&ram_lo, "xen.ram.lo",
+ &ram_memory, 0xc0000, below_4g_mem_size - 0xc0000);
+ memory_region_add_subregion(sysmem, 0xc0000, &ram_lo);
if (above_4g_mem_size > 0) {
- cpu_register_physical_memory(0x100000000ULL, above_4g_mem_size,
- new_block->offset + below_4g_mem_size);
+ memory_region_init_alias(&ram_hi, "xen.ram.hi",
+ &ram_memory, 0x100000000ULL,
+ above_4g_mem_size);
+ memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi);
}
-#endif
}
-void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size)
+void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
{
unsigned long nr_pfn;
xen_pfn_t *pfn_list;
int i;
+ if (mr == &ram_memory) {
+ return;
+ }
+
trace_xen_ram_alloc(ram_addr, size);
nr_pfn = size >> TARGET_PAGE_BITS;
- pfn_list = qemu_malloc(sizeof (*pfn_list) * nr_pfn);
+ pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn);
for (i = 0; i < nr_pfn; i++) {
pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i;
}
if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) {
- hw_error("xen: failed to populate ram at %lx", ram_addr);
+ hw_error("xen: failed to populate ram at " RAM_ADDR_FMT, ram_addr);
}
- qemu_free(pfn_list);
+ g_free(pfn_list);
}
+static XenPhysmap *get_physmapping(XenIOState *state,
+ target_phys_addr_t start_addr, ram_addr_t size)
+{
+ XenPhysmap *physmap = NULL;
+
+ start_addr &= TARGET_PAGE_MASK;
+
+ QLIST_FOREACH(physmap, &state->physmap, list) {
+ if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) {
+ return physmap;
+ }
+ }
+ return NULL;
+}
+
+#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
+static int xen_add_to_physmap(XenIOState *state,
+ target_phys_addr_t start_addr,
+ ram_addr_t size,
+ MemoryRegion *mr,
+ target_phys_addr_t offset_within_region)
+{
+ unsigned long i = 0;
+ int rc = 0;
+ XenPhysmap *physmap = NULL;
+ target_phys_addr_t pfn, start_gpfn;
+ target_phys_addr_t phys_offset = memory_region_get_ram_addr(mr);
+
+ if (get_physmapping(state, start_addr, size)) {
+ return 0;
+ }
+ if (size <= 0) {
+ return -1;
+ }
+
+ /* Xen can only handle a single dirty log region for now and we want
+ * the linear framebuffer to be that region.
+ * Avoid tracking any regions that is not videoram and avoid tracking
+ * the legacy vga region. */
+ if (mr == framebuffer && start_addr > 0xbffff) {
+ goto go_physmap;
+ }
+ return -1;
+
+go_physmap:
+ DPRINTF("mapping vram to %llx - %llx\n", start_addr, start_addr + size);
+
+ pfn = phys_offset >> TARGET_PAGE_BITS;
+ start_gpfn = start_addr >> TARGET_PAGE_BITS;
+ for (i = 0; i < size >> TARGET_PAGE_BITS; i++) {
+ unsigned long idx = pfn + i;
+ xen_pfn_t gpfn = start_gpfn + i;
+
+ rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
+ if (rc) {
+ DPRINTF("add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
+ PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
+ return -rc;
+ }
+ }
+
+ physmap = g_malloc(sizeof (XenPhysmap));
+
+ physmap->start_addr = start_addr;
+ physmap->size = size;
+ physmap->phys_offset = phys_offset;
+
+ QLIST_INSERT_HEAD(&state->physmap, physmap, list);
+
+ xc_domain_pin_memory_cacheattr(xen_xc, xen_domid,
+ start_addr >> TARGET_PAGE_BITS,
+ (start_addr + size) >> TARGET_PAGE_BITS,
+ XEN_DOMCTL_MEM_CACHEATTR_WB);
+ return 0;
+}
+
+static int xen_remove_from_physmap(XenIOState *state,
+ target_phys_addr_t start_addr,
+ ram_addr_t size)
+{
+ unsigned long i = 0;
+ int rc = 0;
+ XenPhysmap *physmap = NULL;
+ target_phys_addr_t phys_offset = 0;
+
+ physmap = get_physmapping(state, start_addr, size);
+ if (physmap == NULL) {
+ return -1;
+ }
+
+ phys_offset = physmap->phys_offset;
+ size = physmap->size;
+
+ DPRINTF("unmapping vram to %llx - %llx, from %llx\n",
+ phys_offset, phys_offset + size, start_addr);
+
+ size >>= TARGET_PAGE_BITS;
+ start_addr >>= TARGET_PAGE_BITS;
+ phys_offset >>= TARGET_PAGE_BITS;
+ for (i = 0; i < size; i++) {
+ unsigned long idx = start_addr + i;
+ xen_pfn_t gpfn = phys_offset + i;
+
+ rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
+ if (rc) {
+ fprintf(stderr, "add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
+ PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
+ return -rc;
+ }
+ }
+
+ QLIST_REMOVE(physmap, list);
+ if (state->log_for_dirtybit == physmap) {
+ state->log_for_dirtybit = NULL;
+ }
+ free(physmap);
+
+ return 0;
+}
+
+#else
+static int xen_add_to_physmap(XenIOState *state,
+ target_phys_addr_t start_addr,
+ ram_addr_t size,
+ MemoryRegion *mr,
+ target_phys_addr_t offset_within_region)
+{
+ return -ENOSYS;
+}
+
+static int xen_remove_from_physmap(XenIOState *state,
+ target_phys_addr_t start_addr,
+ ram_addr_t size)
+{
+ return -ENOSYS;
+}
+#endif
+
+static void xen_set_memory(struct MemoryListener *listener,
+ MemoryRegionSection *section,
+ bool add)
+{
+ XenIOState *state = container_of(listener, XenIOState, memory_listener);
+ target_phys_addr_t start_addr = section->offset_within_address_space;
+ ram_addr_t size = section->size;
+ bool log_dirty = memory_region_is_logging(section->mr);
+ hvmmem_type_t mem_type;
+
+ if (!memory_region_is_ram(section->mr)) {
+ return;
+ }
+
+ if (!(section->mr != &ram_memory
+ && ( (log_dirty && add) || (!log_dirty && !add)))) {
+ return;
+ }
+
+ trace_xen_client_set_memory(start_addr, size, log_dirty);
+
+ start_addr &= TARGET_PAGE_MASK;
+ size = TARGET_PAGE_ALIGN(size);
+
+ if (add) {
+ if (!memory_region_is_rom(section->mr)) {
+ xen_add_to_physmap(state, start_addr, size,
+ section->mr, section->offset_within_region);
+ } else {
+ mem_type = HVMMEM_ram_ro;
+ if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type,
+ start_addr >> TARGET_PAGE_BITS,
+ size >> TARGET_PAGE_BITS)) {
+ DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx"\n",
+ start_addr);
+ }
+ }
+ } else {
+ if (xen_remove_from_physmap(state, start_addr, size) < 0) {
+ DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr);
+ }
+ }
+}
+
+static void xen_region_add(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ xen_set_memory(listener, section, true);
+}
+
+static void xen_region_del(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ xen_set_memory(listener, section, false);
+}
+
+static void xen_sync_dirty_bitmap(XenIOState *state,
+ target_phys_addr_t start_addr,
+ ram_addr_t size)
+{
+ target_phys_addr_t npages = size >> TARGET_PAGE_BITS;
+ const int width = sizeof(unsigned long) * 8;
+ unsigned long bitmap[(npages + width - 1) / width];
+ int rc, i, j;
+ const XenPhysmap *physmap = NULL;
+
+ physmap = get_physmapping(state, start_addr, size);
+ if (physmap == NULL) {
+ /* not handled */
+ return;
+ }
+
+ if (state->log_for_dirtybit == NULL) {
+ state->log_for_dirtybit = physmap;
+ } else if (state->log_for_dirtybit != physmap) {
+ /* Only one range for dirty bitmap can be tracked. */
+ return;
+ }
+
+ rc = xc_hvm_track_dirty_vram(xen_xc, xen_domid,
+ start_addr >> TARGET_PAGE_BITS, npages,
+ bitmap);
+ if (rc < 0) {
+ if (rc != -ENODATA) {
+ fprintf(stderr, "xen: track_dirty_vram failed (0x" TARGET_FMT_plx
+ ", 0x" TARGET_FMT_plx "): %s\n",
+ start_addr, start_addr + size, strerror(-rc));
+ }
+ return;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(bitmap); i++) {
+ unsigned long map = bitmap[i];
+ while (map != 0) {
+ j = ffsl(map) - 1;
+ map &= ~(1ul << j);
+ memory_region_set_dirty(framebuffer,
+ (i * width + j) * TARGET_PAGE_SIZE,
+ TARGET_PAGE_SIZE);
+ };
+ }
+}
+
+static void xen_log_start(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ XenIOState *state = container_of(listener, XenIOState, memory_listener);
+
+ xen_sync_dirty_bitmap(state, section->offset_within_address_space,
+ section->size);
+}
+
+static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section)
+{
+ XenIOState *state = container_of(listener, XenIOState, memory_listener);
+
+ state->log_for_dirtybit = NULL;
+ /* Disable dirty bit tracking */
+ xc_hvm_track_dirty_vram(xen_xc, xen_domid, 0, 0, NULL);
+}
+
+static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section)
+{
+ XenIOState *state = container_of(listener, XenIOState, memory_listener);
+
+ xen_sync_dirty_bitmap(state, section->offset_within_address_space,
+ section->size);
+}
+
+static void xen_log_global_start(MemoryListener *listener)
+{
+}
+
+static void xen_log_global_stop(MemoryListener *listener)
+{
+}
+
+static MemoryListener xen_memory_listener = {
+ .region_add = xen_region_add,
+ .region_del = xen_region_del,
+ .log_start = xen_log_start,
+ .log_stop = xen_log_stop,
+ .log_sync = xen_log_sync,
+ .log_global_start = xen_log_global_start,
+ .log_global_stop = xen_log_global_stop,
+};
/* VCPU Operations, MMIO, IO ring ... */
}
}
} else {
- target_ulong tmp;
+ uint64_t tmp;
if (req->dir == IOREQ_READ) {
for (i = 0; i < req->count; i++) {
case IOREQ_TYPE_TIMEOFFSET:
break;
case IOREQ_TYPE_INVALIDATE:
- qemu_invalidate_map_cache();
+ xen_invalidate_map_cache();
break;
default:
hw_error("Invalid ioreq type 0x%x\n", req->type);
* guest resumes and does a hlt with interrupts disabled which
* causes Xen to powerdown the domain.
*/
- if (vm_running) {
+ if (runstate_is_running()) {
if (qemu_shutdown_requested_get()) {
destroy_hvm_domain();
}
if (qemu_reset_requested_get()) {
- qemu_system_reset();
+ qemu_system_reset(VMRESET_REPORT);
}
}
}
}
-static void xenstore_record_dm_state(XenIOState *s, const char *state)
+static int store_dev_info(int domid, CharDriverState *cs, const char *string)
+{
+ struct xs_handle *xs = NULL;
+ char *path = NULL;
+ char *newpath = NULL;
+ char *pts = NULL;
+ int ret = -1;
+
+ /* Only continue if we're talking to a pty. */
+ if (strncmp(cs->filename, "pty:", 4)) {
+ return 0;
+ }
+ pts = cs->filename + 4;
+
+ /* We now have everything we need to set the xenstore entry. */
+ xs = xs_open(0);
+ if (xs == NULL) {
+ fprintf(stderr, "Could not contact XenStore\n");
+ goto out;
+ }
+
+ path = xs_get_domain_path(xs, domid);
+ if (path == NULL) {
+ fprintf(stderr, "xs_get_domain_path() error\n");
+ goto out;
+ }
+ newpath = realloc(path, (strlen(path) + strlen(string) +
+ strlen("/tty") + 1));
+ if (newpath == NULL) {
+ fprintf(stderr, "realloc error\n");
+ goto out;
+ }
+ path = newpath;
+
+ strcat(path, string);
+ strcat(path, "/tty");
+ if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
+ fprintf(stderr, "xs_write for '%s' fail", string);
+ goto out;
+ }
+ ret = 0;
+
+out:
+ free(path);
+ xs_close(xs);
+
+ return ret;
+}
+
+void xenstore_store_pv_console_info(int i, CharDriverState *chr)
+{
+ if (i == 0) {
+ store_dev_info(xen_domid, chr, "/console");
+ } else {
+ char buf[32];
+ snprintf(buf, sizeof(buf), "/device/console/%d", i);
+ store_dev_info(xen_domid, chr, buf);
+ }
+}
+
+static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
{
char path[50];
+ if (xs == NULL) {
+ fprintf(stderr, "xenstore connection not initialized\n");
+ exit(1);
+ }
+
snprintf(path, sizeof (path), "/local/domain/0/device-model/%u/state", xen_domid);
- if (!xs_write(s->xenstore, XBT_NULL, path, state, strlen(state))) {
+ if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
fprintf(stderr, "error recording dm state\n");
exit(1);
}
if (evtchn_fd != -1) {
qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state);
}
-
- /* record state running */
- xenstore_record_dm_state(state, "running");
}
/* Initialise Xen */
-static void xen_vm_change_state_handler(void *opaque, int running, int reason)
+static void xen_change_state_handler(void *opaque, int running,
+ RunState state)
{
- XenIOState *state = opaque;
if (running) {
- xen_main_loop_prepare(state);
+ /* record state running */
+ xenstore_record_dm_state(xenstore, "running");
}
}
-static void xen_exit_notifier(Notifier *n)
+static void xen_hvm_change_state_handler(void *opaque, int running,
+ RunState rstate)
+{
+ XenIOState *xstate = opaque;
+ if (running) {
+ xen_main_loop_prepare(xstate);
+ }
+}
+
+static void xen_exit_notifier(Notifier *n, void *data)
{
XenIOState *state = container_of(n, XenIOState, exit);
xen_be_printf(NULL, 0, "can't open xen interface\n");
return -1;
}
+ qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
return 0;
}
unsigned long ioreq_pfn;
XenIOState *state;
- state = qemu_mallocz(sizeof (XenIOState));
+ state = g_malloc0(sizeof (XenIOState));
state->xce_handle = xen_xc_evtchn_open(NULL, 0);
if (state->xce_handle == XC_HANDLER_INITIAL_VALUE) {
state->exit.notify = xen_exit_notifier;
qemu_add_exit_notifier(&state->exit);
+ state->suspend.notify = xen_suspend_notifier;
+ qemu_register_suspend_notifier(&state->suspend);
+
xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_IOREQ_PFN, &ioreq_pfn);
DPRINTF("shared page at pfn %lx\n", ioreq_pfn);
state->shared_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
hw_error("map buffered IO page returned error %d", errno);
}
- state->ioreq_local_port = qemu_mallocz(smp_cpus * sizeof (evtchn_port_t));
+ state->ioreq_local_port = g_malloc0(smp_cpus * sizeof (evtchn_port_t));
/* FIXME: how about if we overflow the page here? */
for (i = 0; i < smp_cpus; i++) {
}
/* Init RAM management */
- qemu_map_cache_init();
+ xen_map_cache_init();
xen_ram_init(ram_size);
- qemu_add_vm_change_state_handler(xen_vm_change_state_handler, state);
+ qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);
+
+ state->memory_listener = xen_memory_listener;
+ QLIST_INIT(&state->physmap);
+ memory_listener_register(&state->memory_listener);
+ state->log_for_dirtybit = NULL;
+
+ /* Initialize backend core & drivers */
+ if (xen_be_init() != 0) {
+ fprintf(stderr, "%s: xen backend core setup failed\n", __FUNCTION__);
+ exit(1);
+ }
+ xen_be_register("console", &xen_console_ops);
+ xen_be_register("vkbd", &xen_kbdmouse_ops);
+ xen_be_register("qdisk", &xen_blkdev_ops);
return 0;
}
xc_interface_close(xc_handle);
}
}
+
+void xen_register_framebuffer(MemoryRegion *mr)
+{
+ framebuffer = mr;
+}
projects / qemu.git / blobdiff