Archipelago » qemu

/*

 * QEMU System Emulator

 *

 * Copyright (c) 2003-2008 Fabrice Bellard

 *

 * 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 <stdint.h>

#include <stdarg.h>

#ifndef _WIN32

#include <sys/mman.h>

#endif

#include "config.h"

#include "monitor.h"

#include "sysemu.h"

#include "arch_init.h"

#include "audio/audio.h"

#include "hw/pc.h"

#include "hw/pci.h"

#include "hw/audiodev.h"

#include "kvm.h"

#include "migration.h"

#include "net.h"

#include "gdbstub.h"

#include "hw/smbios.h"

#ifdef TARGET_SPARC

int graphic_width = 1024;

int graphic_height = 768;

int graphic_depth = 8;

#else

int graphic_width = 800;

int graphic_height = 600;

int graphic_depth = 15;

#endif

const char arch_config_name[] = CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf";

#if defined(TARGET_ALPHA)

#define QEMU_ARCH QEMU_ARCH_ALPHA

#elif defined(TARGET_ARM)

#define QEMU_ARCH QEMU_ARCH_ARM

#elif defined(TARGET_CRIS)

#define QEMU_ARCH QEMU_ARCH_CRIS

#elif defined(TARGET_I386)

#define QEMU_ARCH QEMU_ARCH_I386

#elif defined(TARGET_M68K)

#define QEMU_ARCH QEMU_ARCH_M68K

#elif defined(TARGET_MICROBLAZE)

#define QEMU_ARCH QEMU_ARCH_MICROBLAZE

#elif defined(TARGET_MIPS)

#define QEMU_ARCH QEMU_ARCH_MIPS

#elif defined(TARGET_PPC)

#define QEMU_ARCH QEMU_ARCH_PPC

#elif defined(TARGET_S390X)

#define QEMU_ARCH QEMU_ARCH_S390X

#elif defined(TARGET_SH4)

#define QEMU_ARCH QEMU_ARCH_SH4

#elif defined(TARGET_SPARC)

#define QEMU_ARCH QEMU_ARCH_SPARC

#endif

const uint32_t arch_type = QEMU_ARCH;

/***********************************************************/

/* ram save/restore */

#define RAM_SAVE_FLAG_FULL        0x01 /* Obsolete, not used anymore */

#define RAM_SAVE_FLAG_COMPRESS        0x02

#define RAM_SAVE_FLAG_MEM_SIZE        0x04

#define RAM_SAVE_FLAG_PAGE        0x08

#define RAM_SAVE_FLAG_EOS        0x10

static int is_dup_page(uint8_t *page, uint8_t ch)

{

    uint32_t val = ch << 24 | ch << 16 | ch << 8 | ch;

    uint32_t *array = (uint32_t *)page;

    int i;

    for (i = 0; i < (TARGET_PAGE_SIZE / 4); i++) {

        if (array[i] != val) {

            return 0;

        }

    }

    return 1;

}

static int ram_save_block(QEMUFile *f)

{

    static ram_addr_t current_addr = 0;

    ram_addr_t saved_addr = current_addr;

    ram_addr_t addr = 0;

    int found = 0;

    while (addr < last_ram_offset) {

        if (cpu_physical_memory_get_dirty(current_addr, MIGRATION_DIRTY_FLAG)) {

            uint8_t *p;

            cpu_physical_memory_reset_dirty(current_addr,

                                            current_addr + TARGET_PAGE_SIZE,

                                            MIGRATION_DIRTY_FLAG);

            p = qemu_get_ram_ptr(current_addr);

            if (is_dup_page(p, *p)) {

                qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_COMPRESS);

                qemu_put_byte(f, *p);

            } else {

                qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_PAGE);

                qemu_put_buffer(f, p, TARGET_PAGE_SIZE);

            }

            found = 1;

            break;

        }

        addr += TARGET_PAGE_SIZE;

        current_addr = (saved_addr + addr) % last_ram_offset;

    }

    return found;

}

static uint64_t bytes_transferred;

static ram_addr_t ram_save_remaining(void)

{

    ram_addr_t addr;

    ram_addr_t count = 0;

    for (addr = 0; addr < last_ram_offset; addr += TARGET_PAGE_SIZE) {

        if (cpu_physical_memory_get_dirty(addr, MIGRATION_DIRTY_FLAG)) {

            count++;

        }

    }

    return count;

}

uint64_t ram_bytes_remaining(void)

{

    return ram_save_remaining() * TARGET_PAGE_SIZE;

}

uint64_t ram_bytes_transferred(void)

{

    return bytes_transferred;

}

uint64_t ram_bytes_total(void)

{

    return last_ram_offset;

}

int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)

{

    ram_addr_t addr;

    uint64_t bytes_transferred_last;

    double bwidth = 0;

    uint64_t expected_time = 0;

    if (stage < 0) {

        cpu_physical_memory_set_dirty_tracking(0);

        return 0;

    }

    if (cpu_physical_sync_dirty_bitmap(0, TARGET_PHYS_ADDR_MAX) != 0) {

        qemu_file_set_error(f);

        return 0;

    }

    if (stage == 1) {

        bytes_transferred = 0;

        /* Make sure all dirty bits are set */

        for (addr = 0; addr < last_ram_offset; addr += TARGET_PAGE_SIZE) {

            if (!cpu_physical_memory_get_dirty(addr, MIGRATION_DIRTY_FLAG)) {

                cpu_physical_memory_set_dirty(addr);

            }

        }

        /* Enable dirty memory tracking */

        cpu_physical_memory_set_dirty_tracking(1);

        qemu_put_be64(f, last_ram_offset | RAM_SAVE_FLAG_MEM_SIZE);

    }

    bytes_transferred_last = bytes_transferred;

    bwidth = qemu_get_clock_ns(rt_clock);

    while (!qemu_file_rate_limit(f)) {

        int ret;

        ret = ram_save_block(f);

        bytes_transferred += ret * TARGET_PAGE_SIZE;

        if (ret == 0) { /* no more blocks */

            break;

        }

    }

    bwidth = qemu_get_clock_ns(rt_clock) - bwidth;

    bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;

    /* if we haven't transferred anything this round, force expected_time to a

     * a very high value, but without crashing */

    if (bwidth == 0) {

        bwidth = 0.000001;

    }

    /* try transferring iterative blocks of memory */

    if (stage == 3) {

        /* flush all remaining blocks regardless of rate limiting */

        while (ram_save_block(f) != 0) {

            bytes_transferred += TARGET_PAGE_SIZE;

        }

        cpu_physical_memory_set_dirty_tracking(0);

    }

    qemu_put_be64(f, RAM_SAVE_FLAG_EOS);

    expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;

    return (stage == 2) && (expected_time <= migrate_max_downtime());

}

int ram_load(QEMUFile *f, void *opaque, int version_id)

{

    ram_addr_t addr;

    int flags;

    if (version_id != 3) {

        return -EINVAL;

    }

    do {

        addr = qemu_get_be64(f);

        flags = addr & ~TARGET_PAGE_MASK;

        addr &= TARGET_PAGE_MASK;

        if (flags & RAM_SAVE_FLAG_MEM_SIZE) {

            if (addr != last_ram_offset) {

                return -EINVAL;

            }

        }

        if (flags & RAM_SAVE_FLAG_COMPRESS) {

            uint8_t ch = qemu_get_byte(f);

            memset(qemu_get_ram_ptr(addr), ch, TARGET_PAGE_SIZE);

#ifndef _WIN32

            if (ch == 0 &&

                (!kvm_enabled() || kvm_has_sync_mmu())) {

                madvise(qemu_get_ram_ptr(addr), TARGET_PAGE_SIZE,

                        MADV_DONTNEED);

            }

#endif

        } else if (flags & RAM_SAVE_FLAG_PAGE) {

            qemu_get_buffer(f, qemu_get_ram_ptr(addr), TARGET_PAGE_SIZE);

        }

        if (qemu_file_has_error(f)) {

            return -EIO;

        }

    } while (!(flags & RAM_SAVE_FLAG_EOS));

    return 0;

}

void qemu_service_io(void)

{

    qemu_notify_event();

}

#ifdef HAS_AUDIO

struct soundhw soundhw[] = {

#ifdef HAS_AUDIO_CHOICE

#if defined(TARGET_I386) || defined(TARGET_MIPS)

    {

        "pcspk",

        "PC speaker",

        0,

        1,

        { .init_isa = pcspk_audio_init }

    },

#endif

#ifdef CONFIG_SB16

    {

        "sb16",

        "Creative Sound Blaster 16",

        0,

        1,

        { .init_isa = SB16_init }

    },

#endif

#ifdef CONFIG_CS4231A

    {

        "cs4231a",

        "CS4231A",

        0,

        1,

        { .init_isa = cs4231a_init }

    },

#endif

#ifdef CONFIG_ADLIB

    {

        "adlib",

#ifdef HAS_YMF262

        "Yamaha YMF262 (OPL3)",

#else

        "Yamaha YM3812 (OPL2)",

#endif

        0,

        1,

        { .init_isa = Adlib_init }

    },

#endif

#ifdef CONFIG_GUS

    {

        "gus",

        "Gravis Ultrasound GF1",

        0,

        1,

        { .init_isa = GUS_init }

    },

#endif

#ifdef CONFIG_AC97

    {

        "ac97",

        "Intel 82801AA AC97 Audio",

        0,

        0,

        { .init_pci = ac97_init }

    },

#endif

#ifdef CONFIG_ES1370

    {

        "es1370",

        "ENSONIQ AudioPCI ES1370",

        0,

        0,

        { .init_pci = es1370_init }

    },

#endif

#endif /* HAS_AUDIO_CHOICE */

    { NULL, NULL, 0, 0, { NULL } }

};

void select_soundhw(const char *optarg)

{

    struct soundhw *c;

    if (*optarg == '?') {

    show_valid_cards:

        printf("Valid sound card names (comma separated):\n");

        for (c = soundhw; c->name; ++c) {

            printf ("%-11s %s\n", c->name, c->descr);

        }

        printf("\n-soundhw all will enable all of the above\n");

        exit(*optarg != '?');

    }

    else {

        size_t l;

        const char *p;

        char *e;

        int bad_card = 0;

        if (!strcmp(optarg, "all")) {

            for (c = soundhw; c->name; ++c) {

                c->enabled = 1;

            }

            return;

        }

        p = optarg;

        while (*p) {

            e = strchr(p, ',');

            l = !e ? strlen(p) : (size_t) (e - p);

            for (c = soundhw; c->name; ++c) {

                if (!strncmp(c->name, p, l) && !c->name[l]) {

                    c->enabled = 1;

                    break;

                }

            }

            if (!c->name) {

                if (l > 80) {

                    fprintf(stderr,

                            "Unknown sound card name (too big to show)\n");

                }

                else {

                    fprintf(stderr, "Unknown sound card name `%.*s'\n",

                            (int) l, p);

                }

                bad_card = 1;

            }

            p += l + (e != NULL);

        }

        if (bad_card) {

            goto show_valid_cards;

        }

    }

}

#else

void select_soundhw(const char *optarg)

{

}

#endif

int qemu_uuid_parse(const char *str, uint8_t *uuid)

{

    int ret;

    if (strlen(str) != 36) {

        return -1;

    }

    ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],

                 &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],

                 &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],

                 &uuid[15]);

    if (ret != 16) {

        return -1;

    }

#ifdef TARGET_I386

    smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);

#endif

    return 0;

}

void do_acpitable_option(const char *optarg)

{

#ifdef TARGET_I386

    if (acpi_table_add(optarg) < 0) {

        fprintf(stderr, "Wrong acpi table provided\n");

        exit(1);

    }

#endif

}

void do_smbios_option(const char *optarg)

{

#ifdef TARGET_I386

    if (smbios_entry_add(optarg) < 0) {

        fprintf(stderr, "Wrong smbios provided\n");

        exit(1);

    }

#endif

}

void cpudef_init(void)

{

#if defined(cpudef_setup)

    cpudef_setup(); /* parse cpu definitions in target config file */

#endif

}

int audio_available(void)

{

#ifdef HAS_AUDIO

    return 1;

#else

    return 0;

#endif

}

int kvm_available(void)

{

#ifdef CONFIG_KVM

    return 1;

#else

    return 0;

#endif

}

int xen_available(void)

{

#ifdef CONFIG_XEN

    return 1;

#else

    return 0;

#endif

}