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hw/acpi: move object_resolve_type_unambiguous to core QOM 

object_resolve_type_unambiguous provides a useful functionality, that
is currently emulated for example by usb_bus_find().  Move it to core
code and add error reporting for increased generality.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240223124406.234509-2-pbonzini@redhat.com>
[PMD: Fixed style]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
master
Paolo Bonzini 2024-02-23 13:43:57 +01:00 committed by Philippe Mathieu-Daudé
parent 31ae8bb15d
commit ee3b34cd48
3 changed files with 34 additions and 15 deletions
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20
hw/i386/acpi-build.c
View File

@ -192,21 +192,10 @@ static void init_common_fadt_data(MachineState *ms, Object *o,
*data = fadt;
}
static Object *object_resolve_type_unambiguous(const char *typename)
{
bool ambig;
Object *o = object_resolve_path_type("", typename, &ambig);
if (ambig || !o) {
return NULL;
}
return o;
}
static void acpi_get_pm_info(MachineState *machine, AcpiPmInfo *pm)
{
Object *piix = object_resolve_type_unambiguous(TYPE_PIIX4_PM);
Object *lpc = object_resolve_type_unambiguous(TYPE_ICH9_LPC_DEVICE);
Object *piix = object_resolve_type_unambiguous(TYPE_PIIX4_PM, NULL);
Object *lpc = object_resolve_type_unambiguous(TYPE_ICH9_LPC_DEVICE, NULL);
Object *obj = piix ? piix : lpc;
QObject *o;
pm->cpu_hp_io_base = 0;
@ -1428,8 +1417,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
AcpiPmInfo *pm, AcpiMiscInfo *misc,
Range *pci_hole, Range *pci_hole64, MachineState *machine)
{
Object *i440fx = object_resolve_type_unambiguous(TYPE_I440FX_PCI_HOST_BRIDGE);
Object *q35 = object_resolve_type_unambiguous(TYPE_Q35_HOST_DEVICE);
Object *i440fx = object_resolve_type_unambiguous(TYPE_I440FX_PCI_HOST_BRIDGE,
NULL);
Object *q35 = object_resolve_type_unambiguous(TYPE_Q35_HOST_DEVICE, NULL);
CrsRangeEntry *entry;
Aml *dsdt, *sb_scope, *scope, *dev, *method, *field, *pkg, *crs;
CrsRangeSet crs_range_set;

13
include/qom/object.h
View File

@ -1550,6 +1550,19 @@ Object *object_resolve_path(const char *path, bool *ambiguous);
Object *object_resolve_path_type(const char *path, const char *typename,
bool *ambiguous);
/**
* object_resolve_type_unambiguous:
* @typename: the type to look for
* @errp: pointer to error object
*
* Return the only object in the QOM tree of type @typename.
* If no match or more than one match is found, an error is
* returned.
*
* Returns: The matched object or NULL on path lookup failure.
*/
Object *object_resolve_type_unambiguous(const char *typename, Error **errp);
/**
* object_resolve_path_at:
* @parent: the object in which to resolve the path

16
qom/object.c
View File

@ -2229,6 +2229,22 @@ Object *object_resolve_path_at(Object *parent, const char *path)
return object_resolve_abs_path(parent, parts, TYPE_OBJECT);
}
Object *object_resolve_type_unambiguous(const char *typename, Error **errp)
{
bool ambig;
Object *o = object_resolve_path_type("", typename, &ambig);
if (ambig) {
error_setg(errp, "More than one object of type %s", typename);
return NULL;
}
if (!o) {
error_setg(errp, "No object found of type %s", typename);
return NULL;
}
return o;
}
typedef struct StringProperty
{
char *(*get)(Object *, Error **);