From 210d18674a34bb43bd05cdd68d24fd03e161ff3d Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 9 Jun 2020 14:23:21 +0200 Subject: [PATCH] armv7m: Delete unused "ARM,bitband-memory" devices MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit These devices are optional, and enabled by property "enable-bitband". armv7m_instance_init() creates them unconditionally, because the property has not been set then. armv7m_realize() realizes them only when the property is true. Works, although it leaves unrealized devices hanging around in the QOM composition tree. Affects machines microbit, mps2-an505, mps2-an521, musca-a, and musca-b1. Delete the unused devices by making armv7m_realize() unparent them. Visible in "info qom-tree"; here's the change for microbit: /machine (microbit-machine) /microbit.twi (microbit.i2c) /microbit.twi[0] (qemu:memory-region) /nrf51 (nrf51-soc) /armv6m (armv7m) /armv7m-container[0] (qemu:memory-region) - /bitband[0] (ARM,bitband-memory) - /bitband[0] (qemu:memory-region) - /bitband[1] (ARM,bitband-memory) - /bitband[0] (qemu:memory-region) /cpu (cortex-m0-arm-cpu) Cc: Peter Maydell Cc: qemu-arm@nongnu.org Signed-off-by: Markus Armbruster Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Peter Maydell Message-Id: <20200609122339.937862-7-armbru@redhat.com> --- hw/arm/armv7m.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c index 7da57f56d3..f930619f53 100644 --- a/hw/arm/armv7m.c +++ b/hw/arm/armv7m.c @@ -245,8 +245,8 @@ static void armv7m_realize(DeviceState *dev, Error **errp) memory_region_add_subregion(&s->container, 0xe000e000, sysbus_mmio_get_region(sbd, 0)); - if (s->enable_bitband) { - for (i = 0; i < ARRAY_SIZE(s->bitband); i++) { + for (i = 0; i < ARRAY_SIZE(s->bitband); i++) { + if (s->enable_bitband) { Object *obj = OBJECT(&s->bitband[i]); SysBusDevice *sbd = SYS_BUS_DEVICE(&s->bitband[i]); @@ -265,6 +265,8 @@ static void armv7m_realize(DeviceState *dev, Error **errp) memory_region_add_subregion(&s->container, bitband_output_addr[i], sysbus_mmio_get_region(sbd, 0)); + } else { + object_unparent(OBJECT(&s->bitband[i])); } } } -- 2.30.2