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pcie_root_port: Allow ACS to be disabled

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ACS was added in 4.0 unconditionally, this breaks migration
compatibility.
Allow ACS to be disabled by adding a property that's
checked by pcie_root_port.

Unfortunately pcie-root-port doesn't have any instance data,
so there's no where for that flag to live, so stuff it into
PCIESlot.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190730093719.12958-2-dgilbert@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2019-07-30 10:37:18 +01:00 • committed by Michael S. Tsirkin
parent 22235bb609
commit a58dfba201
2 changed files with 4 additions and 1 deletions
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2
include/hw/pci/pcie_port.h
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@ -53,6 +53,8 @@ struct PCIESlot {
PCIExpLinkSpeed speed;
PCIExpLinkWidth width;
/* Disable ACS (really for a pcie_root_port) */
bool disable_acs;
QLIST_ENTRY(PCIESlot) next;
};