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memory: per-AddressSpace dispatch

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Currently we use a global radix tree to dispatch memory access.  This only
works with a single address space; to support multiple address spaces we
make the radix tree a member of AddressSpace (via an intermediate structure
AddressSpaceDispatch to avoid exposing too many internals).

A side effect is that address_space_io also gains a dispatch table.  When
we remove all the pre-memory-API I/O registrations, we can use that for
dispatching I/O and get rid of the original I/O dispatch.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-10-03 16:22:53 +02:00
parent 0e8a6d47af
commit ac1970fbe8
6 changed files with 194 additions and 71 deletions
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22
memory-internal.h
View file

@ -22,6 +22,26 @@
#ifndef CONFIG_USER_ONLY
#include "hw/xen.h"
typedef struct PhysPageEntry PhysPageEntry;
struct PhysPageEntry {
uint16_t is_leaf : 1;
/* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */
uint16_t ptr : 15;
};
typedef struct AddressSpaceDispatch AddressSpaceDispatch;
struct AddressSpaceDispatch {
/* This is a multi-level map on the physical address space.
* The bottom level has pointers to MemoryRegionSections.
*/
PhysPageEntry phys_map;
MemoryListener listener;
};
void address_space_init_dispatch(AddressSpace *as);
ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
MemoryRegion *mr);
ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
@ -30,8 +50,6 @@ void qemu_ram_free_from_ptr(ram_addr_t addr);
struct MemoryRegion;
struct MemoryRegionSection;
void cpu_register_physical_memory_log(struct MemoryRegionSection *section,
bool readonly);
void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);
void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size);