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hw/core/sysbus: Introduce sysbus_mmio_map_name() helper

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Some sysbus devices have conditional mmio regions. This
happens for instance with the hw/acpi/ged device. In that case
it becomes difficult to predict which index a specific MMIO
region corresponds to when one needs to mmio map the region.
Introduce a new helper that takes the name of the region instead
of its index. If the region is not found this returns -1.
Otherwise it maps the corresponding index and returns this latter.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20250714080639.2525563-31-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eric Auger
2025-07-14 10:05:14 +02:00
committed by Michael S. Tsirkin
parent 745315784d
commit 1a10285665
2 changed files with 12 additions and 0 deletions
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11
hw/core/sysbus.c
View File

@ -151,6 +151,17 @@ void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr)
sysbus_mmio_map_common(dev, n, addr, false, 0);
}
int sysbus_mmio_map_name(SysBusDevice *dev, const char *name, hwaddr addr)
{
for (int i = 0; i < dev->num_mmio; i++) {
if (!strcmp(dev->mmio[i].memory->name, name)) {
sysbus_mmio_map(dev, i, addr);
return i;
}
}
return -1;
}
void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
int priority)
{

1
include/hw/sysbus.h
View File

@ -82,6 +82,7 @@ void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
bool sysbus_is_irq_connected(SysBusDevice *dev, int n);
qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n);
void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr);
int sysbus_mmio_map_name(SysBusDevice *dev, const char*name, hwaddr addr);
void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
int priority);