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authoraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-02-27 20:12:36 +0000
committeraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-02-27 20:12:36 +0000
commit8a92ea2f2c7b3e185ef6f4d8d3c376b752275ec7 (patch)
tree5697ae67cc99b9478efaa73725b1cbf5e9a79edf /hw/acpi.c
parent680c30692dc9e8f6d63ad0eb6ddb2a9ace0503cf (diff)
Allow additions of ACPI tables from command line (Gleb Natapov)
This is needed to dynamically add SLIC tables with Windows activation keys. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6650 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw/acpi.c')
-rw-r--r--hw/acpi.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/hw/acpi.c b/hw/acpi.c
index 31851585f..52bc43ad5 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -746,3 +746,172 @@ void qemu_system_device_hot_add(int bus, int slot, int state)
qemu_set_irq(pm_state->irq, 0);
}
}
+
+struct acpi_table_header
+{
+ char signature [4]; /* ACPI signature (4 ASCII characters) */
+ uint32_t length; /* Length of table, in bytes, including header */
+ uint8_t revision; /* ACPI Specification minor version # */
+ uint8_t checksum; /* To make sum of entire table == 0 */
+ char oem_id [6]; /* OEM identification */
+ char oem_table_id [8]; /* OEM table identification */
+ uint32_t oem_revision; /* OEM revision number */
+ char asl_compiler_id [4]; /* ASL compiler vendor ID */
+ uint32_t asl_compiler_revision; /* ASL compiler revision number */
+} __attribute__((packed));
+
+char *acpi_tables;
+size_t acpi_tables_len;
+
+static int acpi_checksum(const uint8_t *data, int len)
+{
+ int sum, i;
+ sum = 0;
+ for(i = 0; i < len; i++)
+ sum += data[i];
+ return (-sum) & 0xff;
+}
+
+int acpi_table_add(const char *t)
+{
+ static const char *dfl_id = "QEMUQEMU";
+ char buf[1024], *p, *f;
+ struct acpi_table_header acpi_hdr;
+ unsigned long val;
+ size_t off;
+
+ memset(&acpi_hdr, 0, sizeof(acpi_hdr));
+
+ if (get_param_value(buf, sizeof(buf), "sig", t)) {
+ strncpy(acpi_hdr.signature, buf, 4);
+ } else {
+ strncpy(acpi_hdr.signature, dfl_id, 4);
+ }
+ if (get_param_value(buf, sizeof(buf), "rev", t)) {
+ val = strtoul(buf, &p, 10);
+ if (val > 255 || *p != '\0')
+ goto out;
+ } else {
+ val = 1;
+ }
+ acpi_hdr.revision = (int8_t)val;
+
+ if (get_param_value(buf, sizeof(buf), "oem_id", t)) {
+ strncpy(acpi_hdr.oem_id, buf, 6);
+ } else {
+ strncpy(acpi_hdr.oem_id, dfl_id, 6);
+ }
+
+ if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) {
+ strncpy(acpi_hdr.oem_table_id, buf, 8);
+ } else {
+ strncpy(acpi_hdr.oem_table_id, dfl_id, 8);
+ }
+
+ if (get_param_value(buf, sizeof(buf), "oem_rev", t)) {
+ val = strtol(buf, &p, 10);
+ if(*p != '\0')
+ goto out;
+ } else {
+ val = 1;
+ }
+ acpi_hdr.oem_revision = cpu_to_le32(val);
+
+ if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) {
+ strncpy(acpi_hdr.asl_compiler_id, buf, 4);
+ } else {
+ strncpy(acpi_hdr.asl_compiler_id, dfl_id, 4);
+ }
+
+ if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) {
+ val = strtol(buf, &p, 10);
+ if(*p != '\0')
+ goto out;
+ } else {
+ val = 1;
+ }
+ acpi_hdr.asl_compiler_revision = cpu_to_le32(val);
+
+ if (!get_param_value(buf, sizeof(buf), "data", t)) {
+ buf[0] = '\0';
+ }
+
+ acpi_hdr.length = sizeof(acpi_hdr);
+
+ f = buf;
+ while (buf[0]) {
+ struct stat s;
+ char *n = index(f, ':');
+ if (n)
+ *n = '\0';
+ if(stat(f, &s) < 0) {
+ fprintf(stderr, "Can't stat file '%s': %s\n", f, strerror(errno));
+ goto out;
+ }
+ acpi_hdr.length += s.st_size;
+ if (!n)
+ break;
+ *n = ':';
+ f = n + 1;
+ }
+
+ if (!acpi_tables) {
+ acpi_tables_len = sizeof(uint16_t);
+ acpi_tables = qemu_mallocz(acpi_tables_len);
+ }
+ p = acpi_tables + acpi_tables_len;
+ acpi_tables_len += sizeof(uint16_t) + acpi_hdr.length;
+ acpi_tables = qemu_realloc(acpi_tables, acpi_tables_len);
+
+ acpi_hdr.length = cpu_to_le32(acpi_hdr.length);
+ *(uint16_t*)p = acpi_hdr.length;
+ p += sizeof(uint16_t);
+ memcpy(p, &acpi_hdr, sizeof(acpi_hdr));
+ off = sizeof(acpi_hdr);
+
+ f = buf;
+ while (buf[0]) {
+ struct stat s;
+ int fd;
+ char *n = index(f, ':');
+ if (n)
+ *n = '\0';
+ fd = open(f, O_RDONLY);
+
+ if(fd < 0)
+ goto out;
+ if(fstat(fd, &s) < 0) {
+ close(fd);
+ goto out;
+ }
+
+ do {
+ int r;
+ r = read(fd, p + off, s.st_size);
+ if (r > 0) {
+ off += r;
+ s.st_size -= r;
+ } else if ((r < 0 && errno != EINTR) || r == 0) {
+ close(fd);
+ goto out;
+ }
+ } while(s.st_size);
+
+ close(fd);
+ if (!n)
+ break;
+ f = n + 1;
+ }
+
+ ((struct acpi_table_header*)p)->checksum = acpi_checksum((uint8_t*)p, off);
+ /* increase number of tables */
+ (*(uint16_t*)acpi_tables) =
+ cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables) + 1);
+ return 0;
+out:
+ if (acpi_tables) {
+ free(acpi_tables);
+ acpi_tables = NULL;
+ }
+ return -1;
+}