@@ -40,7 +40,10 @@ static inline void cpu_register_physical_memory(target_phys_addr_t start_addr,
}
ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr);
+ram_addr_t qemu_ram_map(DeviceState *dev, const char *name,
+ ram_addr_t size, void *host);
ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size);
+void qemu_ram_unmap(ram_addr_t addr);
void qemu_ram_free(ram_addr_t addr);
/* This should only be used for ram local to a device. */
void *qemu_get_ram_ptr(ram_addr_t addr);
@@ -2808,6 +2808,49 @@ static ram_addr_t last_ram_offset(void)
return last;
}
+ram_addr_t qemu_ram_map(DeviceState *dev, const char *name,
+ ram_addr_t size, void *host)
+{
+ RAMBlock *new_block, *block;
+
+ size = TARGET_PAGE_ALIGN(size);
+ new_block = qemu_mallocz(sizeof(*new_block));
+
+ if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
+ char *id = dev->parent_bus->info->get_dev_path(dev);
+ if (id) {
+ snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id);
+ qemu_free(id);
+ }
+ }
+ pstrcat(new_block->idstr, sizeof(new_block->idstr), name);
+
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ if (!strcmp(block->idstr, new_block->idstr)) {
+ fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n",
+ new_block->idstr);
+ abort();
+ }
+ }
+
+ new_block->host = host;
+
+ new_block->offset = find_ram_offset(size);
+ new_block->length = size;
+
+ QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next);
+
+ ram_list.phys_dirty = qemu_realloc(ram_list.phys_dirty,
+ last_ram_offset() >> TARGET_PAGE_BITS);
+ memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
+ 0xff, size >> TARGET_PAGE_BITS);
+
+ if (kvm_enabled())
+ kvm_setup_guest_memory(new_block->host, size);
+
+ return new_block->offset;
+}
+
ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size)
{
RAMBlock *new_block, *block;
@@ -2874,6 +2917,19 @@ ram_addr_t qemu_ram_alloc(DeviceState *dev, const char *name, ram_addr_t size)
return new_block->offset;
}
+void qemu_ram_unmap(ram_addr_t addr)
+{
+ RAMBlock *block;
+
+ QLIST_FOREACH(block, &ram_list.blocks, next) {
+ if (addr == block->offset) {
+ QLIST_REMOVE(block, next);
+ qemu_free(block);
+ return;
+ }
+ }
+}
+
void qemu_ram_free(ram_addr_t addr)
{
RAMBlock *block;
For assigned devices, we want to map the PCI BARs into the VM address space. This is just like mapping an option ROM except the host backing is an mmap area instead of a chunk of vmalloc memory. This allow registration and removal of such areas. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> --- cpu-common.h | 3 +++ exec.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+), 0 deletions(-)