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Proxy device object implements handler for PCI BAR writes and reads. The handler uses BAR_WRITE/BAR_READ message to communicate to the remote process with the BAR address and value to be written/read. The remote process implements handler for BAR_WRITE/BAR_READ message. Signed-off-by: Jagannathan Raman <jag.raman@oracle.com> Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com> Signed-off-by: John G Johnson <john.g.johnson@oracle.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: a8b76714a9688be5552c4c92d089bc9e8a4707ff.1611938319.git.jag.raman@oracle.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
43 lines
943 B
C
43 lines
943 B
C
/*
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* Copyright © 2018, 2021 Oracle and/or its affiliates.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef PROXY_H
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#define PROXY_H
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#include "hw/pci/pci.h"
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#include "io/channel.h"
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#define TYPE_PCI_PROXY_DEV "x-pci-proxy-dev"
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OBJECT_DECLARE_SIMPLE_TYPE(PCIProxyDev, PCI_PROXY_DEV)
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typedef struct ProxyMemoryRegion {
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PCIProxyDev *dev;
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MemoryRegion mr;
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bool memory;
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bool present;
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uint8_t type;
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} ProxyMemoryRegion;
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struct PCIProxyDev {
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PCIDevice parent_dev;
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char *fd;
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/*
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* Mutex used to protect the QIOChannel fd from
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* the concurrent access by the VCPUs since proxy
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* blocks while awaiting for the replies from the
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* process remote.
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*/
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QemuMutex io_mutex;
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QIOChannel *ioc;
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Error *migration_blocker;
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ProxyMemoryRegion region[PCI_NUM_REGIONS];
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};
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#endif /* PROXY_H */
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