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We are going to have multiple DMA windows at different offsets on a PCI bus. For the sake of migration, we will have as many TCE table objects pre-created as many windows supported. So we need a way to map windows dynamically onto a PCI bus when migration of a table is completed but at this stage a TCE table object does not have access to a PHB to ask it to map a DMA window backed by just migrated TCE table. This adds a "root" memory region (UINT64_MAX long) to the TCE object. This new region is mapped on a PCI bus with enabled overlapping as there will be one root MR per TCE table, each of them mapped at 0. The actual IOMMU memory region is a subregion of the root region and a TCE table enables/disables this subregion and maps it at the specific offset inside the root MR which is 1:1 mapping of a PCI address space. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> |
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| block | ||
| crypto | ||
| disas | ||
| exec | ||
| fpu | ||
| hw | ||
| io | ||
| libdecnumber | ||
| migration | ||
| monitor | ||
| net | ||
| qapi | ||
| qemu | ||
| qom | ||
| standard-headers | ||
| sysemu | ||
| ui | ||
| elf.h | ||
| glib-compat.h | ||
| qemu-common.h | ||
| qemu-io.h | ||
| trace-tcg.h | ||
| trace.h | ||