diff options
Diffstat (limited to 'hw/acpi.c')
| -rw-r--r-- | hw/acpi.c | 359 |
1 files changed, 214 insertions, 145 deletions
@@ -23,10 +23,14 @@ #include "hw/pc.h" #include "hw/acpi.h" #include "monitor/monitor.h" +#include "qemu/config-file.h" +#include "qapi/opts-visitor.h" +#include "qapi/dealloc-visitor.h" +#include "qapi-visit.h" struct acpi_table_header { uint16_t _length; /* our length, not actual part of the hdr */ - /* XXX why we have 2 length fields here? */ + /* allows easier parsing for fw_cfg clients */ char sig[4]; /* ACPI signature (4 ASCII characters) */ uint32_t length; /* Length of table, in bytes, including header */ uint8_t revision; /* ACPI Specification minor version # */ @@ -41,16 +45,29 @@ struct acpi_table_header { #define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header) #define ACPI_TABLE_PFX_SIZE sizeof(uint16_t) /* size of the extra prefix */ -static const char dfl_hdr[ACPI_TABLE_HDR_SIZE] = - "\0\0" /* fake _length (2) */ +static const char unsigned dfl_hdr[ACPI_TABLE_HDR_SIZE - ACPI_TABLE_PFX_SIZE] = "QEMU\0\0\0\0\1\0" /* sig (4), len(4), revno (1), csum (1) */ "QEMUQEQEMUQEMU\1\0\0\0" /* OEM id (6), table (8), revno (4) */ "QEMU\1\0\0\0" /* ASL compiler ID (4), version (4) */ ; -char *acpi_tables; +char unsigned *acpi_tables; size_t acpi_tables_len; +static QemuOptsList qemu_acpi_opts = { + .name = "acpi", + .implied_opt_name = "data", + .head = QTAILQ_HEAD_INITIALIZER(qemu_acpi_opts.head), + .desc = { { 0 } } /* validated with OptsVisitor */ +}; + +static void acpi_register_config(void) +{ + qemu_add_opts(&qemu_acpi_opts); +} + +machine_init(acpi_register_config); + static int acpi_checksum(const uint8_t *data, int len) { int sum, i; @@ -61,184 +78,235 @@ static int acpi_checksum(const uint8_t *data, int len) return (-sum) & 0xff; } -/* XXX fixme: this function uses obsolete argument parsing interface */ -int acpi_table_add(const char *t) -{ - char buf[1024], *p, *f; - unsigned long val; - size_t len, start, allen; - bool has_header; - int changed; - int r; - struct acpi_table_header hdr; - - r = 0; - r |= get_param_value(buf, sizeof(buf), "data", t) ? 1 : 0; - r |= get_param_value(buf, sizeof(buf), "file", t) ? 2 : 0; - switch (r) { - case 0: - buf[0] = '\0'; - /* fallthrough for default behavior */ - case 1: - has_header = false; - break; - case 2: - has_header = true; - break; - default: - fprintf(stderr, "acpitable: both data and file are specified\n"); - return -1; - } - if (!acpi_tables) { - allen = sizeof(uint16_t); - acpi_tables = g_malloc0(allen); +/* Install a copy of the ACPI table specified in @blob. + * + * If @has_header is set, @blob starts with the System Description Table Header + * structure. Otherwise, "dfl_hdr" is prepended. In any case, each header field + * is optionally overwritten from @hdrs. + * + * It is valid to call this function with + * (@blob == NULL && bloblen == 0 && !has_header). + * + * @hdrs->file and @hdrs->data are ignored. + * + * SIZE_MAX is considered "infinity" in this function. + * + * The number of tables that can be installed is not limited, but the 16-bit + * counter at the beginning of "acpi_tables" wraps around after UINT16_MAX. + */ +static void acpi_table_install(const char unsigned *blob, size_t bloblen, + bool has_header, + const struct AcpiTableOptions *hdrs, + Error **errp) +{ + size_t body_start; + const char unsigned *hdr_src; + size_t body_size, acpi_payload_size; + struct acpi_table_header *ext_hdr; + unsigned changed_fields; + + /* Calculate where the ACPI table body starts within the blob, plus where + * to copy the ACPI table header from. + */ + if (has_header) { + /* _length | ACPI header in blob | blob body + * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^ + * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size + * == body_start + * + * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + * acpi_payload_size == bloblen + */ + body_start = sizeof dfl_hdr; + + if (bloblen < body_start) { + error_setg(errp, "ACPI table claiming to have header is too " + "short, available: %zu, expected: %zu", bloblen, + body_start); + return; + } + hdr_src = blob; } else { - allen = acpi_tables_len; + /* _length | ACPI header in template | blob body + * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^ + * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size + * == bloblen + * + * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + * acpi_payload_size + */ + body_start = 0; + hdr_src = dfl_hdr; } + body_size = bloblen - body_start; + acpi_payload_size = sizeof dfl_hdr + body_size; - start = allen; - acpi_tables = g_realloc(acpi_tables, start + ACPI_TABLE_HDR_SIZE); - allen += has_header ? ACPI_TABLE_PFX_SIZE : ACPI_TABLE_HDR_SIZE; + if (acpi_payload_size > UINT16_MAX) { + error_setg(errp, "ACPI table too big, requested: %zu, max: %u", + acpi_payload_size, (unsigned)UINT16_MAX); + return; + } - /* now read in the data files, reallocating buffer as needed */ + /* We won't fail from here on. Initialize / extend the globals. */ + if (acpi_tables == NULL) { + acpi_tables_len = sizeof(uint16_t); + acpi_tables = g_malloc0(acpi_tables_len); + } - for (f = strtok(buf, ":"); f; f = strtok(NULL, ":")) { - int fd = open(f, O_RDONLY | O_BINARY); + acpi_tables = g_realloc(acpi_tables, acpi_tables_len + + ACPI_TABLE_PFX_SIZE + + sizeof dfl_hdr + body_size); - if (fd < 0) { - fprintf(stderr, "can't open file %s: %s\n", f, strerror(errno)); - return -1; - } + ext_hdr = (struct acpi_table_header *)(acpi_tables + acpi_tables_len); + acpi_tables_len += ACPI_TABLE_PFX_SIZE; - for (;;) { - char data[8192]; - r = read(fd, data, sizeof(data)); - if (r == 0) { - break; - } else if (r > 0) { - acpi_tables = g_realloc(acpi_tables, allen + r); - memcpy(acpi_tables + allen, data, r); - allen += r; - } else if (errno != EINTR) { - fprintf(stderr, "can't read file %s: %s\n", - f, strerror(errno)); - close(fd); - return -1; - } - } + memcpy(acpi_tables + acpi_tables_len, hdr_src, sizeof dfl_hdr); + acpi_tables_len += sizeof dfl_hdr; - close(fd); + if (blob != NULL) { + memcpy(acpi_tables + acpi_tables_len, blob + body_start, body_size); + acpi_tables_len += body_size; } - /* now fill in the header fields */ + /* increase number of tables */ + cpu_to_le16wu((uint16_t *)acpi_tables, + le16_to_cpupu((uint16_t *)acpi_tables) + 1u); - f = acpi_tables + start; /* start of the table */ - changed = 0; + /* Update the header fields. The strings need not be NUL-terminated. */ + changed_fields = 0; + ext_hdr->_length = cpu_to_le16(acpi_payload_size); - /* copy the header to temp place to align the fields */ - memcpy(&hdr, has_header ? f : dfl_hdr, ACPI_TABLE_HDR_SIZE); + if (hdrs->has_sig) { + strncpy(ext_hdr->sig, hdrs->sig, sizeof ext_hdr->sig); + ++changed_fields; + } - /* length of the table minus our prefix */ - len = allen - start - ACPI_TABLE_PFX_SIZE; + if (has_header && le32_to_cpu(ext_hdr->length) != acpi_payload_size) { + fprintf(stderr, + "warning: ACPI table has wrong length, header says " + "%" PRIu32 ", actual size %zu bytes\n", + le32_to_cpu(ext_hdr->length), acpi_payload_size); + } + ext_hdr->length = cpu_to_le32(acpi_payload_size); - hdr._length = cpu_to_le16(len); + if (hdrs->has_rev) { + ext_hdr->revision = hdrs->rev; + ++changed_fields; + } - if (get_param_value(buf, sizeof(buf), "sig", t)) { - /* strncpy is justified: the field need not be NUL-terminated. */ - strncpy(hdr.sig, buf, sizeof(hdr.sig)); - ++changed; + ext_hdr->checksum = 0; + + if (hdrs->has_oem_id) { + strncpy(ext_hdr->oem_id, hdrs->oem_id, sizeof ext_hdr->oem_id); + ++changed_fields; + } + if (hdrs->has_oem_table_id) { + strncpy(ext_hdr->oem_table_id, hdrs->oem_table_id, + sizeof ext_hdr->oem_table_id); + ++changed_fields; + } + if (hdrs->has_oem_rev) { + ext_hdr->oem_revision = cpu_to_le32(hdrs->oem_rev); + ++changed_fields; + } + if (hdrs->has_asl_compiler_id) { + strncpy(ext_hdr->asl_compiler_id, hdrs->asl_compiler_id, + sizeof ext_hdr->asl_compiler_id); + ++changed_fields; + } + if (hdrs->has_asl_compiler_rev) { + ext_hdr->asl_compiler_revision = cpu_to_le32(hdrs->asl_compiler_rev); + ++changed_fields; } - /* length of the table including header, in bytes */ - if (has_header) { - /* check if actual length is correct */ - val = le32_to_cpu(hdr.length); - if (val != len) { - fprintf(stderr, - "warning: acpitable has wrong length," - " header says %lu, actual size %zu bytes\n", - val, len); - ++changed; - } + if (!has_header && changed_fields == 0) { + fprintf(stderr, "warning: ACPI table: no headers are specified\n"); } - /* we may avoid putting length here if has_header is true */ - hdr.length = cpu_to_le32(len); - if (get_param_value(buf, sizeof(buf), "rev", t)) { - val = strtoul(buf, &p, 0); - if (val > 255 || *p) { - fprintf(stderr, "acpitable: \"rev=%s\" is invalid\n", buf); - return -1; - } - hdr.revision = (uint8_t)val; - ++changed; + /* recalculate checksum */ + ext_hdr->checksum = acpi_checksum((const char unsigned *)ext_hdr + + ACPI_TABLE_PFX_SIZE, acpi_payload_size); +} + +void acpi_table_add(const QemuOpts *opts, Error **errp) +{ + AcpiTableOptions *hdrs = NULL; + Error *err = NULL; + char **pathnames = NULL; + char **cur; + size_t bloblen = 0; + char unsigned *blob = NULL; + + { + OptsVisitor *ov; + + ov = opts_visitor_new(opts); + visit_type_AcpiTableOptions(opts_get_visitor(ov), &hdrs, NULL, &err); + opts_visitor_cleanup(ov); } - if (get_param_value(buf, sizeof(buf), "oem_id", t)) { - /* strncpy is justified: the field need not be NUL-terminated. */ - strncpy(hdr.oem_id, buf, sizeof(hdr.oem_id)); - ++changed; + if (err) { + goto out; + } + if (hdrs->has_file == hdrs->has_data) { + error_setg(&err, "'-acpitable' requires one of 'data' or 'file'"); + goto out; } - if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) { - /* strncpy is justified: the field need not be NUL-terminated. */ - strncpy(hdr.oem_table_id, buf, sizeof(hdr.oem_table_id)); - ++changed; + pathnames = g_strsplit(hdrs->has_file ? hdrs->file : hdrs->data, ":", 0); + if (pathnames == NULL || pathnames[0] == NULL) { + error_setg(&err, "'-acpitable' requires at least one pathname"); + goto out; } - if (get_param_value(buf, sizeof(buf), "oem_rev", t)) { - val = strtol(buf, &p, 0); - if (*p) { - fprintf(stderr, "acpitable: \"oem_rev=%s\" is invalid\n", buf); - return -1; + /* now read in the data files, reallocating buffer as needed */ + for (cur = pathnames; *cur; ++cur) { + int fd = open(*cur, O_RDONLY | O_BINARY); + + if (fd < 0) { + error_setg(&err, "can't open file %s: %s", *cur, strerror(errno)); + goto out; } - hdr.oem_revision = cpu_to_le32(val); - ++changed; - } - if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) { - /* strncpy is justified: the field need not be NUL-terminated. */ - strncpy(hdr.asl_compiler_id, buf, sizeof(hdr.asl_compiler_id)); - ++changed; - } + for (;;) { + char unsigned data[8192]; + ssize_t r; - if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) { - val = strtol(buf, &p, 0); - if (*p) { - fprintf(stderr, "acpitable: \"%s=%s\" is invalid\n", - "asl_compiler_rev", buf); - return -1; + r = read(fd, data, sizeof data); + if (r == 0) { + break; + } else if (r > 0) { + blob = g_realloc(blob, bloblen + r); + memcpy(blob + bloblen, data, r); + bloblen += r; + } else if (errno != EINTR) { + error_setg(&err, "can't read file %s: %s", + *cur, strerror(errno)); + close(fd); + goto out; + } } - hdr.asl_compiler_revision = cpu_to_le32(val); - ++changed; - } - if (!has_header && !changed) { - fprintf(stderr, "warning: acpitable: no table headers are specified\n"); + close(fd); } + acpi_table_install(blob, bloblen, hdrs->has_file, hdrs, &err); - /* now calculate checksum of the table, complete with the header */ - /* we may as well leave checksum intact if has_header is true */ - /* alternatively there may be a way to set cksum to a given value */ - hdr.checksum = 0; /* for checksum calculation */ +out: + g_free(blob); + g_strfreev(pathnames); - /* put header back */ - memcpy(f, &hdr, sizeof(hdr)); + if (hdrs != NULL) { + QapiDeallocVisitor *dv; - if (changed || !has_header || 1) { - ((struct acpi_table_header *)f)->checksum = - acpi_checksum((uint8_t *)f + ACPI_TABLE_PFX_SIZE, len); + dv = qapi_dealloc_visitor_new(); + visit_type_AcpiTableOptions(qapi_dealloc_get_visitor(dv), &hdrs, NULL, + NULL); + qapi_dealloc_visitor_cleanup(dv); } - /* increase number of tables */ - (*(uint16_t *)acpi_tables) = - cpu_to_le32(le32_to_cpu(*(uint16_t *)acpi_tables) + 1); - - acpi_tables_len = allen; - return 0; - + error_propagate(errp, err); } static void acpi_notify_wakeup(Notifier *notifier, void *data) @@ -472,8 +540,9 @@ static const MemoryRegionOps acpi_pm_cnt_ops = { .endianness = DEVICE_LITTLE_ENDIAN, }; -void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent) +void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent, uint8_t s4_val) { + ar->pm1.cnt.s4_val = s4_val; ar->wakeup.notify = acpi_notify_wakeup; qemu_register_wakeup_notifier(&ar->wakeup); memory_region_init_io(&ar->pm1.cnt.io, &acpi_pm_cnt_ops, ar, "acpi-cnt", 2); |
