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multi-process: Synchronize remote memory

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Add ProxyMemoryListener object which is used to keep the view of the RAM
in sync between QEMU and remote process.
A MemoryListener is registered for system-memory AddressSpace. The
listener sends SYNC_SYSMEM message to the remote process when memory
listener commits the changes to memory, the remote process receives
the message and processes it in the handler for SYNC_SYSMEM message.

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 04fe4e6a9ca90d4f11ab6f59be7652f5b086a071.1611938319.git.jag.raman@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jagannathan Raman
2021-01-29 11:46:18 -05:00
committed by Stefan Hajnoczi
parent 7ee3f82384
commit c746b74a7d
7 changed files with 270 additions and 0 deletions
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2
include/hw/remote/proxy.h
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@@ -11,6 +11,7 @@
#include "hw/pci/pci.h"
#include "io/channel.h"
#include "hw/remote/proxy-memory-listener.h"
#define TYPE_PCI_PROXY_DEV "x-pci-proxy-dev"
OBJECT_DECLARE_SIMPLE_TYPE(PCIProxyDev, PCI_PROXY_DEV)
@@ -36,6 +37,7 @@ struct PCIProxyDev {
QemuMutex io_mutex;
QIOChannel *ioc;
Error *migration_blocker;
ProxyMemoryListener proxy_listener;
ProxyMemoryRegion region[PCI_NUM_REGIONS];
};