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authorMarkus Armbruster <armbru@redhat.com>2013-08-16 15:18:30 +0200
committerMichael S. Tsirkin <mst@redhat.com>2013-09-28 23:49:39 +0300
commitec2df8c10a4585ba4641ae482cf2f5f13daa810e (patch)
tree267088957ca75a0d59ff9ae3fedfdf8224d44a43 /hw
parent4f953d2fc806f1ba6fa76f01dfd121fe7d0dc4a7 (diff)
smbios: Improve diagnostics for conflicting entries
We allow either tables or fields for the same type. Makes sense, because SeaBIOS uses fields only when no tables are present. We do this by searching the SMBIOS blob for a previously added table or field. Error messages look like this: qemu-system-x86_64: -smbios type=1,serial=42: SMBIOS type 1 table already defined, cannot add field User needs to know that "table" is defined by -smbios file=..., and "field" by -smbios type=... Instead of searching the blob, record additions of interest, and check that. Simpler, and makes better error messages possible: qemu-system-x86_64: -smbios file=smbios_type_1.bin: Can't mix file= and type= for same type qemu-system-x86_64: -smbios type=1,serial=42,serial=99: This is the conflicting setting Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/i386/smbios.c43
1 files changed, 17 insertions, 26 deletions
diff --git a/hw/i386/smbios.c b/hw/i386/smbios.c
index abfd6f7daa..42635513b8 100644
--- a/hw/i386/smbios.c
+++ b/hw/i386/smbios.c
@@ -48,6 +48,12 @@ static uint8_t *smbios_entries;
static size_t smbios_entries_len;
static int smbios_type4_count = 0;
+static struct {
+ bool seen;
+ int headertype;
+ Location loc;
+} first_opt[2];
+
static QemuOptsList qemu_smbios_opts = {
.name = "smbios",
.head = QTAILQ_HEAD_INITIALIZER(qemu_smbios_opts.head),
@@ -159,35 +165,20 @@ uint8_t *smbios_get_table(size_t *length)
*/
static void smbios_check_collision(int type, int entry)
{
- uint16_t *num_entries = (uint16_t *)smbios_entries;
- struct smbios_header *header;
- char *p;
- int i;
-
- if (!num_entries)
- return;
-
- p = (char *)(num_entries + 1);
-
- for (i = 0; i < *num_entries; i++) {
- header = (struct smbios_header *)p;
- if (entry == SMBIOS_TABLE_ENTRY && header->type == SMBIOS_FIELD_ENTRY) {
- struct smbios_field *field = (void *)header;
- if (type == field->type) {
- error_report("SMBIOS type %d field already defined, "
- "cannot add table", type);
- exit(1);
- }
- } else if (entry == SMBIOS_FIELD_ENTRY &&
- header->type == SMBIOS_TABLE_ENTRY) {
- struct smbios_structure_header *table = (void *)(header + 1);
- if (type == table->type) {
- error_report("SMBIOS type %d table already defined, "
- "cannot add field", type);
+ if (type < ARRAY_SIZE(first_opt)) {
+ if (first_opt[type].seen) {
+ if (first_opt[type].headertype != entry) {
+ error_report("Can't mix file= and type= for same type");
+ loc_push_restore(&first_opt[type].loc);
+ error_report("This is the conflicting setting");
+ loc_pop(&first_opt[type].loc);
exit(1);
}
+ } else {
+ first_opt[type].seen = true;
+ first_opt[type].headertype = entry;
+ loc_save(&first_opt[type].loc);
}
- p += le16_to_cpu(header->length);
}
}