| /* |
| * XEN platform pci device, formerly known as the event channel device |
| * |
| * Copyright (c) 2003-2004 Intel Corp. |
| * Copyright (c) 2006 XenSource |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include <assert.h> |
| |
| #include "hw.h" |
| #include "pc.h" |
| #include "pci.h" |
| #include "irq.h" |
| #include "xen_common.h" |
| #include "net.h" |
| #include "xen_backend.h" |
| #include "trace.h" |
| #include "exec-memory.h" |
| |
| #include <xenguest.h> |
| |
| //#define DEBUG_PLATFORM |
| |
| #ifdef DEBUG_PLATFORM |
| #define DPRINTF(fmt, ...) do { \ |
| fprintf(stderr, "xen_platform: " fmt, ## __VA_ARGS__); \ |
| } while (0) |
| #else |
| #define DPRINTF(fmt, ...) do { } while (0) |
| #endif |
| |
| #define PFFLAG_ROM_LOCK 1 /* Sets whether ROM memory area is RW or RO */ |
| |
| typedef struct PCIXenPlatformState { |
| PCIDevice pci_dev; |
| MemoryRegion fixed_io; |
| MemoryRegion bar; |
| MemoryRegion mmio_bar; |
| uint8_t flags; /* used only for version_id == 2 */ |
| int drivers_blacklisted; |
| uint16_t driver_product_version; |
| |
| /* Log from guest drivers */ |
| char log_buffer[4096]; |
| int log_buffer_off; |
| } PCIXenPlatformState; |
| |
| #define XEN_PLATFORM_IOPORT 0x10 |
| |
| /* Send bytes to syslog */ |
| static void log_writeb(PCIXenPlatformState *s, char val) |
| { |
| if (val == '\n' || s->log_buffer_off == sizeof(s->log_buffer) - 1) { |
| /* Flush buffer */ |
| s->log_buffer[s->log_buffer_off] = 0; |
| trace_xen_platform_log(s->log_buffer); |
| s->log_buffer_off = 0; |
| } else { |
| s->log_buffer[s->log_buffer_off++] = val; |
| } |
| } |
| |
| /* Xen Platform, Fixed IOPort */ |
| #define UNPLUG_ALL_IDE_DISKS 1 |
| #define UNPLUG_ALL_NICS 2 |
| #define UNPLUG_AUX_IDE_DISKS 4 |
| |
| static void unplug_nic(PCIBus *b, PCIDevice *d, void *o) |
| { |
| if (pci_get_word(d->config + PCI_CLASS_DEVICE) == |
| PCI_CLASS_NETWORK_ETHERNET) { |
| /* Until qdev_free includes a call to object_unparent, we call it here |
| */ |
| object_unparent(&d->qdev.parent_obj); |
| qdev_free(&d->qdev); |
| } |
| } |
| |
| static void pci_unplug_nics(PCIBus *bus) |
| { |
| pci_for_each_device(bus, 0, unplug_nic, NULL); |
| } |
| |
| static void unplug_disks(PCIBus *b, PCIDevice *d, void *o) |
| { |
| if (pci_get_word(d->config + PCI_CLASS_DEVICE) == |
| PCI_CLASS_STORAGE_IDE) { |
| qdev_unplug(&(d->qdev), NULL); |
| } |
| } |
| |
| static void pci_unplug_disks(PCIBus *bus) |
| { |
| pci_for_each_device(bus, 0, unplug_disks, NULL); |
| } |
| |
| static void platform_fixed_ioport_writew(void *opaque, uint32_t addr, uint32_t val) |
| { |
| PCIXenPlatformState *s = opaque; |
| |
| switch (addr) { |
| case 0: |
| /* Unplug devices. Value is a bitmask of which devices to |
| unplug, with bit 0 the IDE devices, bit 1 the network |
| devices, and bit 2 the non-primary-master IDE devices. */ |
| if (val & UNPLUG_ALL_IDE_DISKS) { |
| DPRINTF("unplug disks\n"); |
| bdrv_drain_all(); |
| bdrv_flush_all(); |
| pci_unplug_disks(s->pci_dev.bus); |
| } |
| if (val & UNPLUG_ALL_NICS) { |
| DPRINTF("unplug nics\n"); |
| pci_unplug_nics(s->pci_dev.bus); |
| } |
| if (val & UNPLUG_AUX_IDE_DISKS) { |
| DPRINTF("unplug auxiliary disks not supported\n"); |
| } |
| break; |
| case 2: |
| switch (val) { |
| case 1: |
| DPRINTF("Citrix Windows PV drivers loaded in guest\n"); |
| break; |
| case 0: |
| DPRINTF("Guest claimed to be running PV product 0?\n"); |
| break; |
| default: |
| DPRINTF("Unknown PV product %d loaded in guest\n", val); |
| break; |
| } |
| s->driver_product_version = val; |
| break; |
| } |
| } |
| |
| static void platform_fixed_ioport_writel(void *opaque, uint32_t addr, |
| uint32_t val) |
| { |
| switch (addr) { |
| case 0: |
| /* PV driver version */ |
| break; |
| } |
| } |
| |
| static void platform_fixed_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
| { |
| PCIXenPlatformState *s = opaque; |
| |
| switch (addr) { |
| case 0: /* Platform flags */ { |
| hvmmem_type_t mem_type = (val & PFFLAG_ROM_LOCK) ? |
| HVMMEM_ram_ro : HVMMEM_ram_rw; |
| if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type, 0xc0, 0x40)) { |
| DPRINTF("unable to change ro/rw state of ROM memory area!\n"); |
| } else { |
| s->flags = val & PFFLAG_ROM_LOCK; |
| DPRINTF("changed ro/rw state of ROM memory area. now is %s state.\n", |
| (mem_type == HVMMEM_ram_ro ? "ro":"rw")); |
| } |
| break; |
| } |
| case 2: |
| log_writeb(s, val); |
| break; |
| } |
| } |
| |
| static uint32_t platform_fixed_ioport_readw(void *opaque, uint32_t addr) |
| { |
| PCIXenPlatformState *s = opaque; |
| |
| switch (addr) { |
| case 0: |
| if (s->drivers_blacklisted) { |
| /* The drivers will recognise this magic number and refuse |
| * to do anything. */ |
| return 0xd249; |
| } else { |
| /* Magic value so that you can identify the interface. */ |
| return 0x49d2; |
| } |
| default: |
| return 0xffff; |
| } |
| } |
| |
| static uint32_t platform_fixed_ioport_readb(void *opaque, uint32_t addr) |
| { |
| PCIXenPlatformState *s = opaque; |
| |
| switch (addr) { |
| case 0: |
| /* Platform flags */ |
| return s->flags; |
| case 2: |
| /* Version number */ |
| return 1; |
| default: |
| return 0xff; |
| } |
| } |
| |
| static void platform_fixed_ioport_reset(void *opaque) |
| { |
| PCIXenPlatformState *s = opaque; |
| |
| platform_fixed_ioport_writeb(s, 0, 0); |
| } |
| |
| const MemoryRegionPortio xen_platform_ioport[] = { |
| { 0, 16, 4, .write = platform_fixed_ioport_writel, }, |
| { 0, 16, 2, .write = platform_fixed_ioport_writew, }, |
| { 0, 16, 1, .write = platform_fixed_ioport_writeb, }, |
| { 0, 16, 2, .read = platform_fixed_ioport_readw, }, |
| { 0, 16, 1, .read = platform_fixed_ioport_readb, }, |
| PORTIO_END_OF_LIST() |
| }; |
| |
| static const MemoryRegionOps platform_fixed_io_ops = { |
| .old_portio = xen_platform_ioport, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static void platform_fixed_ioport_init(PCIXenPlatformState* s) |
| { |
| memory_region_init_io(&s->fixed_io, &platform_fixed_io_ops, s, |
| "xen-fixed", 16); |
| memory_region_add_subregion(get_system_io(), XEN_PLATFORM_IOPORT, |
| &s->fixed_io); |
| } |
| |
| /* Xen Platform PCI Device */ |
| |
| static uint32_t xen_platform_ioport_readb(void *opaque, uint32_t addr) |
| { |
| if (addr == 0) { |
| return platform_fixed_ioport_readb(opaque, 0); |
| } else { |
| return ~0u; |
| } |
| } |
| |
| static void xen_platform_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
| { |
| PCIXenPlatformState *s = opaque; |
| |
| switch (addr) { |
| case 0: /* Platform flags */ |
| platform_fixed_ioport_writeb(opaque, 0, val); |
| break; |
| case 8: |
| log_writeb(s, val); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static MemoryRegionPortio xen_pci_portio[] = { |
| { 0, 0x100, 1, .read = xen_platform_ioport_readb, }, |
| { 0, 0x100, 1, .write = xen_platform_ioport_writeb, }, |
| PORTIO_END_OF_LIST() |
| }; |
| |
| static const MemoryRegionOps xen_pci_io_ops = { |
| .old_portio = xen_pci_portio, |
| }; |
| |
| static void platform_ioport_bar_setup(PCIXenPlatformState *d) |
| { |
| memory_region_init_io(&d->bar, &xen_pci_io_ops, d, "xen-pci", 0x100); |
| } |
| |
| static uint64_t platform_mmio_read(void *opaque, target_phys_addr_t addr, |
| unsigned size) |
| { |
| DPRINTF("Warning: attempted read from physical address " |
| "0x" TARGET_FMT_plx " in xen platform mmio space\n", addr); |
| |
| return 0; |
| } |
| |
| static void platform_mmio_write(void *opaque, target_phys_addr_t addr, |
| uint64_t val, unsigned size) |
| { |
| DPRINTF("Warning: attempted write of 0x%"PRIx64" to physical " |
| "address 0x" TARGET_FMT_plx " in xen platform mmio space\n", |
| val, addr); |
| } |
| |
| static const MemoryRegionOps platform_mmio_handler = { |
| .read = &platform_mmio_read, |
| .write = &platform_mmio_write, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static void platform_mmio_setup(PCIXenPlatformState *d) |
| { |
| memory_region_init_io(&d->mmio_bar, &platform_mmio_handler, d, |
| "xen-mmio", 0x1000000); |
| } |
| |
| static int xen_platform_post_load(void *opaque, int version_id) |
| { |
| PCIXenPlatformState *s = opaque; |
| |
| platform_fixed_ioport_writeb(s, 0, s->flags); |
| |
| return 0; |
| } |
| |
| static const VMStateDescription vmstate_xen_platform = { |
| .name = "platform", |
| .version_id = 4, |
| .minimum_version_id = 4, |
| .minimum_version_id_old = 4, |
| .post_load = xen_platform_post_load, |
| .fields = (VMStateField []) { |
| VMSTATE_PCI_DEVICE(pci_dev, PCIXenPlatformState), |
| VMSTATE_UINT8(flags, PCIXenPlatformState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static int xen_platform_initfn(PCIDevice *dev) |
| { |
| PCIXenPlatformState *d = DO_UPCAST(PCIXenPlatformState, pci_dev, dev); |
| uint8_t *pci_conf; |
| |
| pci_conf = d->pci_dev.config; |
| |
| pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY); |
| |
| pci_config_set_prog_interface(pci_conf, 0); |
| |
| pci_conf[PCI_INTERRUPT_PIN] = 1; |
| |
| platform_ioport_bar_setup(d); |
| pci_register_bar(&d->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->bar); |
| |
| /* reserve 16MB mmio address for share memory*/ |
| platform_mmio_setup(d); |
| pci_register_bar(&d->pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH, |
| &d->mmio_bar); |
| |
| platform_fixed_ioport_init(d); |
| |
| return 0; |
| } |
| |
| static void platform_reset(DeviceState *dev) |
| { |
| PCIXenPlatformState *s = DO_UPCAST(PCIXenPlatformState, pci_dev.qdev, dev); |
| |
| platform_fixed_ioport_reset(s); |
| } |
| |
| static void xen_platform_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| k->init = xen_platform_initfn; |
| k->vendor_id = PCI_VENDOR_ID_XEN; |
| k->device_id = PCI_DEVICE_ID_XEN_PLATFORM; |
| k->class_id = PCI_CLASS_OTHERS << 8 | 0x80; |
| k->subsystem_vendor_id = PCI_VENDOR_ID_XEN; |
| k->subsystem_id = PCI_DEVICE_ID_XEN_PLATFORM; |
| k->revision = 1; |
| dc->desc = "XEN platform pci device"; |
| dc->reset = platform_reset; |
| dc->vmsd = &vmstate_xen_platform; |
| } |
| |
| static TypeInfo xen_platform_info = { |
| .name = "xen-platform", |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PCIXenPlatformState), |
| .class_init = xen_platform_class_init, |
| }; |
| |
| static void xen_platform_register_types(void) |
| { |
| type_register_static(&xen_platform_info); |
| } |
| |
| type_init(xen_platform_register_types) |