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spoof: SMBIOS type 8 (ports) + type 9 (slots) defaults (patch 0025)

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Phase 1. Real boards expose port connectors and expansion slots; QEMU emits none, so a
guest dmidecode looks conspicuously empty. Inject a plausible desktop default set
(USB/LAN/audio ports + PCIe/M.2 slots) via the existing type8/type9 build path when none
were configured. Inert without a seed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Gregory Lirent
2026-06-11 23:20:51 +03:00
parent ec27a8f4e5
commit 4998af9cd1
2 changed files with 64 additions and 0 deletions
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patches/0025-smbios-ports-slots.patch
+63
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@@ -0,0 +1,63 @@
qemu-spoof: SMBIOS type 8 (ports) + type 9 (slots) defaults
Real boards expose port connectors (type 8: USB/LAN/audio jacks) and expansion slots
(type 9: PCIe/M.2). QEMU emits none, so a guest dmidecode shows a conspicuously empty
machine. Inject a plausible desktop default set (via the existing type8/type9 build
path) when the operator configured none. Inert without a seed. (spoof.h include added
by 0015-smbios-vm-bit.)
diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c
index 7d71418..140b42a 100644
--- a/hw/smbios/smbios.c
+++ b/hw/smbios/smbios.c
@@ -1040,6 +1040,51 @@ void smbios_set_defaults(const char *manufacturer, const char *product,
SMBIOS_SET_DEFAULT(type4.version, version);
SMBIOS_SET_DEFAULT(type17.loc_pfx, "DIMM");
SMBIOS_SET_DEFAULT(type17.manufacturer, manufacturer);
+
+ /* qemu-spoof: real boards expose port connectors (type 8) and expansion slots
+ * (type 9); QEMU emits none, so dmidecode is conspicuously empty. Inject a
+ * plausible desktop default set when none were configured. Inert without a seed. */
+ if (spoof_on() && QTAILQ_EMPTY(&type8)) {
+ static const struct { const char *intr, *extr; uint8_t ct, pt; } sp_ports[] = {
+ { "JUSB1", "USB1", 0x12, 0x10 }, /* Access Bus (USB) / USB */
+ { "JUSB2", "USB2", 0x12, 0x10 },
+ { "JUSB3", "USB3", 0x12, 0x10 },
+ { "JRJ45", "LAN", 0x0B, 0x1F }, /* RJ-45 / Network */
+ { "JAUD1", "Line Out", 0x1D, 0x1C }, /* Mini Jack / Audio */
+ { "JAUD2", "Mic In", 0x1D, 0x1C },
+ };
+ size_t i;
+ for (i = 0; i < ARRAY_SIZE(sp_ports); i++) {
+ struct type8_instance *t8 = g_new0(struct type8_instance, 1);
+ t8->internal_reference = g_strdup(sp_ports[i].intr);
+ t8->external_reference = g_strdup(sp_ports[i].extr);
+ t8->connector_type = sp_ports[i].ct;
+ t8->port_type = sp_ports[i].pt;
+ QTAILQ_INSERT_TAIL(&type8, t8, next);
+ }
+ }
+ if (spoof_on() && QTAILQ_EMPTY(&type9)) {
+ static const struct {
+ const char *desig; uint8_t type, width, usage, length; uint16_t id;
+ } sp_slots[] = {
+ { "PCIEX16", 0xB6, 0x0D, 0x03, 0x04, 0x01 }, /* PCIe gen3 x16, available */
+ { "PCIEX1_1", 0xB5, 0x0A, 0x03, 0x03, 0x02 }, /* PCIe gen3 x1 */
+ { "M2_1", 0xB6, 0x0D, 0x04, 0x03, 0x03 }, /* M.2, in use */
+ };
+ size_t i;
+ for (i = 0; i < ARRAY_SIZE(sp_slots); i++) {
+ struct type9_instance *t9 = g_new0(struct type9_instance, 1);
+ t9->slot_designation = g_strdup(sp_slots[i].desig);
+ t9->slot_type = sp_slots[i].type;
+ t9->slot_data_bus_width = sp_slots[i].width;
+ t9->current_usage = sp_slots[i].usage;
+ t9->slot_length = sp_slots[i].length;
+ t9->slot_id = sp_slots[i].id;
+ t9->slot_characteristics1 = 0x04; /* PME# supported */
+ t9->slot_characteristics2 = 0x01;
+ QTAILQ_INSERT_TAIL(&type9, t9, next);
+ }
+ }
}
static void smbios_entry_point_setup(SmbiosEntryPointType ep_type)
patches/README.md
+1
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@@ -26,6 +26,7 @@ match exactly. Naming: `0002` = infra, `0010+` = one aspect each.
| 0022-storage-extra | IDE WWN + rotation rate; NVMe EUI-64 + NGUID |
| 0023-cpu-microcode | CPU microcode revision (IA32_UCODE_REV), vendor-positioned |
| 0024-smbios-bios-type0 | SMBIOS type0 BIOS vendor/version/date + type1 system manufacturer/product (real-OEM or Hyper-V persona) |
| 0025-smbios-ports-slots | SMBIOS type 8 (port connectors) + type 9 (expansion slots) default set |
## The PCI-id problem (why 0018 is careful)