mirror of https://github.com/xemu-project/xemu.git
4b519ef1de
Previously we have per-device system memory aliases when DMAR is disabled by the system. It will slow the system down if there are lots of devices especially when DMAR is disabled, because each of the aliased system address space will contain O(N) slots, and rendering such N address spaces will be O(N^2) complexity. This patch introduces a shared nodmar memory region and for each device we only create an alias to the shared memory region. With the aliasing, QEMU memory core API will be able to detect when devices are sharing the same address space (which is the nodmar address space) when rendering the FlatViews and the total number of FlatViews can be dramatically reduced when there are a lot of devices. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20190313094323.18263-1-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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| .. | ||
| apic-msidef.h | ||
| apic.h | ||
| apic_internal.h | ||
| ich9.h | ||
| intel_iommu.h | ||
| ioapic.h | ||
| ioapic_internal.h | ||
| pc.h | ||
| topology.h | ||
| x86-iommu.h | ||