acpi: Permit OEM ID and OEM table ID fields to be changed

Qemu's ACPI table generation sets the fields OEM ID and OEM table ID
to "BOCHS " and "BXPCxxxx" where "xxxx" is replaced by the ACPI
table name.

Some games like Red Dead Redemption 2 seem to check the ACPI OEM ID
and OEM table ID for the strings "BOCHS" and "BXPC" and if they are
found, the game crashes(this may be an intentional detection
mechanism to prevent playing the game in a virtualized environment).

This patch allows you to override these default values.

The feature can be used in this manner:
qemu -machine oem-id=ABCDEF,oem-table-id=GHIJKLMN

The oem-id string can be up to 6 bytes in size, and the
oem-table-id string can be up to 8 bytes in size. If the string are
smaller than their respective sizes they will be padded with space.
If either of these parameters is not set, the current default values
will be used for the one missing.

Note that the the OEM Table ID field will not be extended with the
name of the table, but will use either the default name or the user
provided one.

This does not affect the -acpitable option (for user-defined ACPI
tables), which has precedence over -machine option.

Signed-off-by: Marian Postevca <posteuca@mutex.one>
Message-Id: <20210119003216.17637-3-posteuca@mutex.one>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

5 files changed, 11 insertions, 7 deletions

diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index 38a42f4..cf9f442 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -41,7 +41,7 @@ enum {
 };
 
 typedef struct AcpiRsdpData {
-    uint8_t oem_id[6] QEMU_NONSTRING; /* OEM identification */
+    char *oem_id;                     /* OEM identification */
     uint8_t revision;                 /* Must be 0 for 1.0, 2 for 2.0 */
 
     unsigned *rsdt_tbl_offset;
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 54a5aec..380d3e3 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -8,7 +8,7 @@
 #define ACPI_BUILD_TABLE_MAX_SIZE         0x200000
 
 #define ACPI_BUILD_APPNAME6 "BOCHS "
-#define ACPI_BUILD_APPNAME4 "BXPC"
+#define ACPI_BUILD_APPNAME8 "BXPC    "
 
 #define ACPI_BUILD_TABLE_FILE "etc/acpi/tables"
 #define ACPI_BUILD_RSDP_FILE "etc/acpi/rsdp"
@@ -459,10 +459,12 @@ Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set, uint32_t io_offset,
 void build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base,
                        uint64_t len, int node, MemoryAffinityFlags flags);
 
-void build_slit(GArray *table_data, BIOSLinker *linker, MachineState *ms);
+void build_slit(GArray *table_data, BIOSLinker *linker, MachineState *ms,
+                const char *oem_id, const char *oem_table_id);
 
 void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f,
                 const char *oem_id, const char *oem_table_id);
 
-void build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog);
+void build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
+                const char *oem_id, const char *oem_table_id);
 #endif
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 4ad025e..2ae8bc1 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -67,7 +67,8 @@ typedef struct AcpiGhesState {
 } AcpiGhesState;
 
 void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker);
-void acpi_build_hest(GArray *table_data, BIOSLinker *linker);
+void acpi_build_hest(GArray *table_data, BIOSLinker *linker,
+                     const char *oem_id, const char *oem_table_id);
 void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
                           GArray *hardware_errors);
 int acpi_ghes_record_errors(uint8_t notify, uint64_t error_physical_addr);
diff --git a/include/hw/acpi/pci.h b/include/hw/acpi/pci.h
index bf2a3ed..e514f17 100644
--- a/include/hw/acpi/pci.h
+++ b/include/hw/acpi/pci.h
@@ -33,5 +33,6 @@ typedef struct AcpiMcfgInfo {
     uint32_t size;
 } AcpiMcfgInfo;
 
-void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info);
+void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info,
+                const char *oem_id, const char *oem_table_id);
 #endif
diff --git a/include/hw/acpi/vmgenid.h b/include/hw/acpi/vmgenid.h
index cb4ad37..dc8bb34 100644
--- a/include/hw/acpi/vmgenid.h
+++ b/include/hw/acpi/vmgenid.h
@@ -31,7 +31,7 @@ static inline Object *find_vmgenid_dev(void)
 }
 
 void vmgenid_build_acpi(VmGenIdState *vms, GArray *table_data, GArray *guid,
-                        BIOSLinker *linker);
+                        BIOSLinker *linker, const char *oem_id);
 void vmgenid_add_fw_cfg(VmGenIdState *vms, FWCfgState *s, GArray *guid);
 
 #endif