*
*/
+#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 <xen/hvm/ioreq.h>
+#include <xen/hvm/params.h>
+
+//#define DEBUG_XEN
+
+#ifdef DEBUG_XEN
+#define DPRINTF(fmt, ...) \
+ do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+ do { } while (0)
+#endif
+
+/* Compatibility with older version */
+#if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
+static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
+{
+ return shared_page->vcpu_iodata[i].vp_eport;
+}
+static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
+{
+ return &shared_page->vcpu_iodata[vcpu].vp_ioreq;
+}
+# define FMT_ioreq_size PRIx64
+#else
+static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
+{
+ return shared_page->vcpu_ioreq[i].vp_eport;
+}
+static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
+{
+ return &shared_page->vcpu_ioreq[vcpu];
+}
+# define FMT_ioreq_size "u"
+#endif
+
+#define BUFFER_IO_MAX_DELAY 100
+
+typedef struct XenPhysmap {
+ target_phys_addr_t start_addr;
+ ram_addr_t size;
+ 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;
+ QEMUTimer *buffered_io_timer;
+ /* the evtchn port for polling the notification, */
+ evtchn_port_t *ioreq_local_port;
+ /* the evtchn fd for polling */
+ XenEvtchn xce_handle;
+ /* which vcpu we are serving */
+ int send_vcpu;
+
+ struct xs_handle *xenstore;
+ CPUPhysMemoryClient client;
+ QLIST_HEAD(, XenPhysmap) physmap;
+ const XenPhysmap *log_for_dirtybit;
+
+ Notifier exit;
+} XenIOState;
+
+/* Xen specific function for piix pci */
+
+int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
+{
+ return irq_num + ((pci_dev->devfn >> 3) << 2);
+}
+
+void xen_piix3_set_irq(void *opaque, int irq_num, int level)
+{
+ xc_hvm_set_pci_intx_level(xen_xc, xen_domid, 0, 0, irq_num >> 2,
+ irq_num & 3, level);
+}
+
+void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
+{
+ int i;
+
+ /* Scan for updates to PCI link routes (0x60-0x63). */
+ for (i = 0; i < len; i++) {
+ uint8_t v = (val >> (8 * i)) & 0xff;
+ if (v & 0x80) {
+ v = 0;
+ }
+ v &= 0xf;
+ if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
+ xc_hvm_set_pci_link_route(xen_xc, xen_domid, address + i - 0x60, v);
+ }
+ }
+}
+
+void xen_cmos_set_s3_resume(void *opaque, int irq, int level)
+{
+ pc_cmos_set_s3_resume(opaque, irq, level);
+ if (level) {
+ 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)
+{
+ xc_hvm_set_isa_irq_level(xen_xc, xen_domid, irq, level);
+}
+
+qemu_irq *xen_interrupt_controller_init(void)
+{
+ return qemu_allocate_irqs(xen_set_irq, NULL, 16);
+}
+
+/* Memory Ops */
+
+static void xen_ram_init(ram_addr_t ram_size)
+{
+ RAMBlock *new_block;
+ ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
+
+ 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);
+
+ if (ram_size >= 0xe0000000 ) {
+ above_4g_mem_size = ram_size - 0xe0000000;
+ below_4g_mem_size = 0xe0000000;
+ } 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
+ if (above_4g_mem_size > 0) {
+ cpu_register_physical_memory(0x100000000ULL, above_4g_mem_size,
+ new_block->offset + below_4g_mem_size);
+ }
+#endif
+}
+
+void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size)
+{
+ unsigned long nr_pfn;
+ xen_pfn_t *pfn_list;
+ int i;
+
+ trace_xen_ram_alloc(ram_addr, size);
+
+ nr_pfn = size >> TARGET_PAGE_BITS;
+ pfn_list = qemu_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);
+ }
+
+ qemu_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,
+ target_phys_addr_t phys_offset)
+{
+ unsigned long i = 0;
+ int rc = 0;
+ XenPhysmap *physmap = NULL;
+ target_phys_addr_t pfn, start_gpfn;
+ RAMBlock *block;
+
+ 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. */
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ if (!strcmp(block->idstr, "vga.vram") && block->offset == phys_offset
+ && start_addr > 0xbffff) {
+ goto go_physmap;
+ }
+ }
+ return -1;
+
+go_physmap:
+ DPRINTF("mapping vram to %llx - %llx, from %llx\n",
+ start_addr, start_addr + size, phys_offset);
+
+ 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 = qemu_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,
+ target_phys_addr_t phys_offset)
+{
+ 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_client_set_memory(struct CPUPhysMemoryClient *client,
+ target_phys_addr_t start_addr,
+ ram_addr_t size,
+ ram_addr_t phys_offset,
+ bool log_dirty)
+{
+ XenIOState *state = container_of(client, XenIOState, client);
+ ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
+ hvmmem_type_t mem_type;
+
+ if (!(start_addr != phys_offset
+ && ( (log_dirty && flags < IO_MEM_UNASSIGNED)
+ || (!log_dirty && flags == IO_MEM_UNASSIGNED)))) {
+ return;
+ }
+
+ trace_xen_client_set_memory(start_addr, size, phys_offset, log_dirty);
+
+ start_addr &= TARGET_PAGE_MASK;
+ size = TARGET_PAGE_ALIGN(size);
+ phys_offset &= TARGET_PAGE_MASK;
+
+ switch (flags) {
+ case IO_MEM_RAM:
+ xen_add_to_physmap(state, start_addr, size, phys_offset);
+ break;
+ case IO_MEM_ROM:
+ 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);
+ }
+ break;
+ case IO_MEM_UNASSIGNED:
+ if (xen_remove_from_physmap(state, start_addr, size) < 0) {
+ DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr);
+ }
+ break;
+ }
+}
+
+static int 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;
+ target_phys_addr_t vram_offset = 0;
+ 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 -1;
+ }
+
+ if (state->log_for_dirtybit == NULL) {
+ state->log_for_dirtybit = physmap;
+ } else if (state->log_for_dirtybit != physmap) {
+ return -1;
+ }
+ vram_offset = physmap->phys_offset;
+
+ rc = xc_hvm_track_dirty_vram(xen_xc, xen_domid,
+ start_addr >> TARGET_PAGE_BITS, npages,
+ bitmap);
+ if (rc) {
+ return rc;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(bitmap); i++) {
+ unsigned long map = bitmap[i];
+ while (map != 0) {
+ j = ffsl(map) - 1;
+ map &= ~(1ul << j);
+ cpu_physical_memory_set_dirty(vram_offset + (i * width + j) * TARGET_PAGE_SIZE);
+ };
+ }
+
+ return 0;
+}
+
+static int xen_log_start(CPUPhysMemoryClient *client, target_phys_addr_t phys_addr, ram_addr_t size)
+{
+ XenIOState *state = container_of(client, XenIOState, client);
+
+ return xen_sync_dirty_bitmap(state, phys_addr, size);
+}
+
+static int xen_log_stop(CPUPhysMemoryClient *client, target_phys_addr_t phys_addr, ram_addr_t size)
+{
+ XenIOState *state = container_of(client, XenIOState, client);
+
+ state->log_for_dirtybit = NULL;
+ /* Disable dirty bit tracking */
+ return xc_hvm_track_dirty_vram(xen_xc, xen_domid, 0, 0, NULL);
+}
+
+static int xen_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client,
+ target_phys_addr_t start_addr,
+ target_phys_addr_t end_addr)
+{
+ XenIOState *state = container_of(client, XenIOState, client);
+
+ return xen_sync_dirty_bitmap(state, start_addr, end_addr - start_addr);
+}
+
+static int xen_client_migration_log(struct CPUPhysMemoryClient *client,
+ int enable)
+{
+ return 0;
+}
+
+static CPUPhysMemoryClient xen_cpu_phys_memory_client = {
+ .set_memory = xen_client_set_memory,
+ .sync_dirty_bitmap = xen_client_sync_dirty_bitmap,
+ .migration_log = xen_client_migration_log,
+ .log_start = xen_log_start,
+ .log_stop = xen_log_stop,
+};
+
+/* VCPU Operations, MMIO, IO ring ... */
+
+static void xen_reset_vcpu(void *opaque)
+{
+ CPUState *env = opaque;
+
+ env->halted = 1;
+}
+
+void xen_vcpu_init(void)
+{
+ CPUState *first_cpu;
+
+ if ((first_cpu = qemu_get_cpu(0))) {
+ qemu_register_reset(xen_reset_vcpu, first_cpu);
+ xen_reset_vcpu(first_cpu);
+ }
+}
+
+/* get the ioreq packets from share mem */
+static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu)
+{
+ ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu);
+
+ if (req->state != STATE_IOREQ_READY) {
+ DPRINTF("I/O request not ready: "
+ "%x, ptr: %x, port: %"PRIx64", "
+ "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
+ req->state, req->data_is_ptr, req->addr,
+ req->data, req->count, req->size);
+ return NULL;
+ }
+
+ xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
+
+ req->state = STATE_IOREQ_INPROCESS;
+ return req;
+}
+
+/* use poll to get the port notification */
+/* ioreq_vec--out,the */
+/* retval--the number of ioreq packet */
+static ioreq_t *cpu_get_ioreq(XenIOState *state)
+{
+ int i;
+ evtchn_port_t port;
+
+ port = xc_evtchn_pending(state->xce_handle);
+ if (port != -1) {
+ for (i = 0; i < smp_cpus; i++) {
+ if (state->ioreq_local_port[i] == port) {
+ break;
+ }
+ }
+
+ if (i == smp_cpus) {
+ hw_error("Fatal error while trying to get io event!\n");
+ }
+
+ /* unmask the wanted port again */
+ xc_evtchn_unmask(state->xce_handle, port);
+
+ /* get the io packet from shared memory */
+ state->send_vcpu = i;
+ return cpu_get_ioreq_from_shared_memory(state, i);
+ }
+
+ /* read error or read nothing */
+ return NULL;
+}
+
+static uint32_t do_inp(pio_addr_t addr, unsigned long size)
+{
+ switch (size) {
+ case 1:
+ return cpu_inb(addr);
+ case 2:
+ return cpu_inw(addr);
+ case 4:
+ return cpu_inl(addr);
+ default:
+ hw_error("inp: bad size: %04"FMT_pioaddr" %lx", addr, size);
+ }
+}
+
+static void do_outp(pio_addr_t addr,
+ unsigned long size, uint32_t val)
+{
+ switch (size) {
+ case 1:
+ return cpu_outb(addr, val);
+ case 2:
+ return cpu_outw(addr, val);
+ case 4:
+ return cpu_outl(addr, val);
+ default:
+ hw_error("outp: bad size: %04"FMT_pioaddr" %lx", addr, size);
+ }
+}
+
+static void cpu_ioreq_pio(ioreq_t *req)
+{
+ int i, sign;
+
+ sign = req->df ? -1 : 1;
+
+ if (req->dir == IOREQ_READ) {
+ if (!req->data_is_ptr) {
+ req->data = do_inp(req->addr, req->size);
+ } else {
+ uint32_t tmp;
+
+ for (i = 0; i < req->count; i++) {
+ tmp = do_inp(req->addr, req->size);
+ cpu_physical_memory_write(req->data + (sign * i * req->size),
+ (uint8_t *) &tmp, req->size);
+ }
+ }
+ } else if (req->dir == IOREQ_WRITE) {
+ if (!req->data_is_ptr) {
+ do_outp(req->addr, req->size, req->data);
+ } else {
+ for (i = 0; i < req->count; i++) {
+ uint32_t tmp = 0;
+
+ cpu_physical_memory_read(req->data + (sign * i * req->size),
+ (uint8_t*) &tmp, req->size);
+ do_outp(req->addr, req->size, tmp);
+ }
+ }
+ }
+}
+
+static void cpu_ioreq_move(ioreq_t *req)
+{
+ int i, sign;
+
+ sign = req->df ? -1 : 1;
+
+ if (!req->data_is_ptr) {
+ if (req->dir == IOREQ_READ) {
+ for (i = 0; i < req->count; i++) {
+ cpu_physical_memory_read(req->addr + (sign * i * req->size),
+ (uint8_t *) &req->data, req->size);
+ }
+ } else if (req->dir == IOREQ_WRITE) {
+ for (i = 0; i < req->count; i++) {
+ cpu_physical_memory_write(req->addr + (sign * i * req->size),
+ (uint8_t *) &req->data, req->size);
+ }
+ }
+ } else {
+ target_ulong tmp;
+
+ if (req->dir == IOREQ_READ) {
+ for (i = 0; i < req->count; i++) {
+ cpu_physical_memory_read(req->addr + (sign * i * req->size),
+ (uint8_t*) &tmp, req->size);
+ cpu_physical_memory_write(req->data + (sign * i * req->size),
+ (uint8_t*) &tmp, req->size);
+ }
+ } else if (req->dir == IOREQ_WRITE) {
+ for (i = 0; i < req->count; i++) {
+ cpu_physical_memory_read(req->data + (sign * i * req->size),
+ (uint8_t*) &tmp, req->size);
+ cpu_physical_memory_write(req->addr + (sign * i * req->size),
+ (uint8_t*) &tmp, req->size);
+ }
+ }
+ }
+}
+
+static void handle_ioreq(ioreq_t *req)
+{
+ if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
+ (req->size < sizeof (target_ulong))) {
+ req->data &= ((target_ulong) 1 << (8 * req->size)) - 1;
+ }
+
+ switch (req->type) {
+ case IOREQ_TYPE_PIO:
+ cpu_ioreq_pio(req);
+ break;
+ case IOREQ_TYPE_COPY:
+ cpu_ioreq_move(req);
+ break;
+ case IOREQ_TYPE_TIMEOFFSET:
+ break;
+ case IOREQ_TYPE_INVALIDATE:
+ xen_invalidate_map_cache();
+ break;
+ default:
+ hw_error("Invalid ioreq type 0x%x\n", req->type);
+ }
+}
+
+static void handle_buffered_iopage(XenIOState *state)
+{
+ buf_ioreq_t *buf_req = NULL;
+ ioreq_t req;
+ int qw;
+
+ if (!state->buffered_io_page) {
+ return;
+ }
+
+ while (state->buffered_io_page->read_pointer != state->buffered_io_page->write_pointer) {
+ buf_req = &state->buffered_io_page->buf_ioreq[
+ state->buffered_io_page->read_pointer % IOREQ_BUFFER_SLOT_NUM];
+ req.size = 1UL << buf_req->size;
+ req.count = 1;
+ req.addr = buf_req->addr;
+ req.data = buf_req->data;
+ req.state = STATE_IOREQ_READY;
+ req.dir = buf_req->dir;
+ req.df = 1;
+ req.type = buf_req->type;
+ req.data_is_ptr = 0;
+ qw = (req.size == 8);
+ if (qw) {
+ buf_req = &state->buffered_io_page->buf_ioreq[
+ (state->buffered_io_page->read_pointer + 1) % IOREQ_BUFFER_SLOT_NUM];
+ req.data |= ((uint64_t)buf_req->data) << 32;
+ }
+
+ handle_ioreq(&req);
+
+ xen_mb();
+ state->buffered_io_page->read_pointer += qw ? 2 : 1;
+ }
+}
+
+static void handle_buffered_io(void *opaque)
+{
+ XenIOState *state = opaque;
+
+ handle_buffered_iopage(state);
+ qemu_mod_timer(state->buffered_io_timer,
+ BUFFER_IO_MAX_DELAY + qemu_get_clock_ms(rt_clock));
+}
+
+static void cpu_handle_ioreq(void *opaque)
+{
+ XenIOState *state = opaque;
+ ioreq_t *req = cpu_get_ioreq(state);
+
+ handle_buffered_iopage(state);
+ if (req) {
+ handle_ioreq(req);
+
+ if (req->state != STATE_IOREQ_INPROCESS) {
+ fprintf(stderr, "Badness in I/O request ... not in service?!: "
+ "%x, ptr: %x, port: %"PRIx64", "
+ "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
+ req->state, req->data_is_ptr, req->addr,
+ req->data, req->count, req->size);
+ destroy_hvm_domain();
+ return;
+ }
+
+ xen_wmb(); /* Update ioreq contents /then/ update state. */
+
+ /*
+ * We do this before we send the response so that the tools
+ * have the opportunity to pick up on the reset before the
+ * guest resumes and does a hlt with interrupts disabled which
+ * causes Xen to powerdown the domain.
+ */
+ if (vm_running) {
+ if (qemu_shutdown_requested_get()) {
+ destroy_hvm_domain();
+ }
+ if (qemu_reset_requested_get()) {
+ qemu_system_reset(VMRESET_REPORT);
+ }
+ }
+
+ req->state = STATE_IORESP_READY;
+ xc_evtchn_notify(state->xce_handle, state->ioreq_local_port[state->send_vcpu]);
+ }
+}
+
+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(XenIOState *s, const char *state)
+{
+ char path[50];
+
+ snprintf(path, sizeof (path), "/local/domain/0/device-model/%u/state", xen_domid);
+ if (!xs_write(s->xenstore, XBT_NULL, path, state, strlen(state))) {
+ fprintf(stderr, "error recording dm state\n");
+ exit(1);
+ }
+}
+
+static void xen_main_loop_prepare(XenIOState *state)
+{
+ int evtchn_fd = -1;
+
+ if (state->xce_handle != XC_HANDLER_INITIAL_VALUE) {
+ evtchn_fd = xc_evtchn_fd(state->xce_handle);
+ }
+
+ state->buffered_io_timer = qemu_new_timer_ms(rt_clock, handle_buffered_io,
+ state);
+ qemu_mod_timer(state->buffered_io_timer, qemu_get_clock_ms(rt_clock));
+
+ 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)
+{
+ XenIOState *state = opaque;
+ if (running) {
+ xen_main_loop_prepare(state);
+ }
+}
+
+static void xen_exit_notifier(Notifier *n)
+{
+ XenIOState *state = container_of(n, XenIOState, exit);
+
+ xc_evtchn_close(state->xce_handle);
+ xs_daemon_close(state->xenstore);
+}
+
int xen_init(void)
{
xen_xc = xen_xc_interface_open(0, 0, 0);
return 0;
}
+
+int xen_hvm_init(void)
+{
+ int i, rc;
+ unsigned long ioreq_pfn;
+ XenIOState *state;
+
+ state = qemu_mallocz(sizeof (XenIOState));
+
+ state->xce_handle = xen_xc_evtchn_open(NULL, 0);
+ if (state->xce_handle == XC_HANDLER_INITIAL_VALUE) {
+ perror("xen: event channel open");
+ return -errno;
+ }
+
+ state->xenstore = xs_daemon_open();
+ if (state->xenstore == NULL) {
+ perror("xen: xenstore open");
+ return -errno;
+ }
+
+ state->exit.notify = xen_exit_notifier;
+ qemu_add_exit_notifier(&state->exit);
+
+ 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,
+ PROT_READ|PROT_WRITE, ioreq_pfn);
+ if (state->shared_page == NULL) {
+ hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT,
+ errno, xen_xc);
+ }
+
+ xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_PFN, &ioreq_pfn);
+ DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn);
+ state->buffered_io_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
+ PROT_READ|PROT_WRITE, ioreq_pfn);
+ if (state->buffered_io_page == NULL) {
+ hw_error("map buffered IO page returned error %d", errno);
+ }
+
+ state->ioreq_local_port = qemu_mallocz(smp_cpus * sizeof (evtchn_port_t));
+
+ /* FIXME: how about if we overflow the page here? */
+ for (i = 0; i < smp_cpus; i++) {
+ rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
+ xen_vcpu_eport(state->shared_page, i));
+ if (rc == -1) {
+ fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
+ return -1;
+ }
+ state->ioreq_local_port[i] = rc;
+ }
+
+ /* Init RAM management */
+ xen_map_cache_init();
+ xen_ram_init(ram_size);
+
+ qemu_add_vm_change_state_handler(xen_vm_change_state_handler, state);
+
+ state->client = xen_cpu_phys_memory_client;
+ QLIST_INIT(&state->physmap);
+ cpu_register_phys_memory_client(&state->client);
+ 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;
+}
+
+void destroy_hvm_domain(void)
+{
+ XenXC xc_handle;
+ int sts;
+
+ xc_handle = xen_xc_interface_open(0, 0, 0);
+ if (xc_handle == XC_HANDLER_INITIAL_VALUE) {
+ fprintf(stderr, "Cannot acquire xenctrl handle\n");
+ } else {
+ sts = xc_domain_shutdown(xc_handle, xen_domid, SHUTDOWN_poweroff);
+ if (sts != 0) {
+ fprintf(stderr, "? xc_domain_shutdown failed to issue poweroff, "
+ "sts %d, %s\n", sts, strerror(errno));
+ } else {
+ fprintf(stderr, "Issued domain %d poweroff\n", xen_domid);
+ }
+ xc_interface_close(xc_handle);
+ }
+}
projects / qemu.git / blobdiff