Commit Graph

306 Commits

Author SHA1 Message Date
Avi Kivity 14a3c10ac8 memory: rename MemoryRegion::has_ram_addr to ::terminates
I/O regions will not have ram_addrs, so this is a better name.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-29 08:25:43 -05:00
Avi Kivity cc31e6e7b3 memory: abstract address space operations
Prepare for multiple address space support by abstracting away the details
of registering a memory range with qemu's flat representation into an
AddressSpace object.

Note operations which are memory specific are not abstracted, since they will
never be called on I/O address spaces anyway.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-29 08:25:42 -05:00
Avi Kivity 1c0ffa58af Internal interfaces for memory API
get_system_memory() provides the root of the memory hierarchy.

This interface is intended to be private between memory.c and exec.c.
If this file is included elsewhere, it should be regarded as a bug (or
TODO item).  However, it will be temporarily needed for the conversion
to hierarchical memory routing.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-29 08:25:42 -05:00
Avi Kivity 3d8e6bf977 memory: merge adjacent segments of a single memory region
Simple implementations of memory routers, for example the Cirrus VGA memory banks
or the 440FX PAM registers can generate adjacent memory regions which are contiguous.
Detect these and merge them; this saves kvm memory slots and shortens lookup times.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-29 08:25:42 -05:00
Avi Kivity 5a58334769 memory: implement dirty tracking
Currently dirty tracking is implemented by passing through
all calls to the underlying cpu_physical_memory_*() calls.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-29 08:25:42 -05:00
Avi Kivity 093bc2cd88 Hierarchical memory region API
The memory API separates the attributes of a memory region (its size, how
reads or writes are handled, dirty logging, and coalescing) from where it
is mapped and whether it is enabled.  This allows a device to configure
a memory region once, then hand it off to its parent bus to map it according
to the bus configuration.

Hierarchical registration also allows a device to compose a region out of
a number of sub-regions with different properties; for example some may be
RAM while others may be MMIO.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-07-29 08:25:42 -05:00