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hw/i386: Add a default_bus_bypass_iommu pc machine option

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Add a default_bus_bypass_iommu pc machine option to enable/disable
bypass_iommu for default root bus. The option is disabled by default
and can be enabled with:
$QEMU -machine q35,default_bus_bypass_iommu=true

Signed-off-by: Xingang Wang <wangxingang5@huawei.com>
Message-Id: <1625748919-52456-5-git-send-email-wangxingang5@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xingang Wang 2021-07-08 12:55:14 +00:00 • committed by Michael S. Tsirkin
parent 6d7a85483a
commit c9e96b04fc
3 changed files with 23 additions and 0 deletions
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20
hw/i386/pc.c
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@ -1524,6 +1524,21 @@ static void pc_machine_set_hpet(Object *obj, bool value, Error **errp)
pcms->hpet_enabled = value;
}
static bool pc_machine_get_default_bus_bypass_iommu(Object *obj, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
return pcms->default_bus_bypass_iommu;
}
static void pc_machine_set_default_bus_bypass_iommu(Object *obj, bool value,
Error **errp)
{
PCMachineState *pcms = PC_MACHINE(obj);
pcms->default_bus_bypass_iommu = value;
}
static void pc_machine_get_max_ram_below_4g(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
@ -1623,6 +1638,7 @@ static void pc_machine_initfn(Object *obj)
#ifdef CONFIG_HPET
pcms->hpet_enabled = true;
#endif
pcms->default_bus_bypass_iommu = false;
pc_system_flash_create(pcms);
pcms->pcspk = isa_new(TYPE_PC_SPEAKER);
@ -1747,6 +1763,10 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
object_class_property_add_bool(oc, "hpet",
pc_machine_get_hpet, pc_machine_set_hpet);
object_class_property_add_bool(oc, "default_bus_bypass_iommu",
pc_machine_get_default_bus_bypass_iommu,
pc_machine_set_default_bus_bypass_iommu);
object_class_property_add(oc, PC_MACHINE_MAX_FW_SIZE, "size",
pc_machine_get_max_fw_size, pc_machine_set_max_fw_size,
NULL, NULL);