Message ID | 20220214031956.3726764-4-penny.zheng@arm.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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direct-map memory map
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Hi, On 14/02/2022 03:19, Penny Zheng wrote: > From: Stefano Stabellini <sstabellini@kernel.org> > > At the moment, we are only supporting device-passthrough when Xen has > enabled the IOMMU. There are some use cases where it is not possible to > use the IOMMU (e.g. doesn't exist, hardware limitation, performance) yet > it would be OK to assign a device to trusted domain so long they are > direct-mapped or the device doesn't do DMA. > > Note that when the IOMMU is disabled, it will be necessary to add > xen,force-assign-without-iommu for every device that needs to be assigned. > > Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com> > Signed-off-by: Penny Zheng <penny.zheng@arm.com> > Tested-by: Stefano Stabellini <sstabellini@kernel.org> Acked-by: Julien Grall <jgrall@amazon.com> Cheers,
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 6467e8ee32..c1e8c99f64 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -3047,7 +3047,8 @@ void __init create_domUs(void) panic("Missing property 'cpus' for domain %s\n", dt_node_name(node)); - if ( dt_find_compatible_node(node, NULL, "multiboot,device-tree") ) + if ( dt_find_compatible_node(node, NULL, "multiboot,device-tree") && + iommu_enabled ) d_cfg.flags |= XEN_DOMCTL_CDF_iommu; if ( !dt_property_read_u32(node, "nr_spis", &d_cfg.arch.nr_spis) )