From: Marcelo Tosatti <mtosa...@redhat.com>
Which allows drivers to register an mmap region into ram block mappings.
To be used by device assignment driver.
Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>
Signed-off-by: Avi Kivity <a...@redhat.com>
diff --git a/cpu-common.h b/cpu-common.h
index 29b4ea5..4b0ba60 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -40,6 +40,7 @@ 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(ram_addr_t size, void *host);
ram_addr_t qemu_ram_alloc(ram_addr_t);
void qemu_ram_free(ram_addr_t addr);
/* This should only be used for ram local to a device. */
diff --git a/exec.c b/exec.c
index 9748496..4f94e87 100644
--- a/exec.c
+++ b/exec.c
@@ -2805,6 +2805,34 @@ static void *file_ram_alloc(ram_addr_t memory, const
char *path)
}
#endif
+ram_addr_t qemu_ram_map(ram_addr_t size, void *host)
+{
+ RAMBlock *new_block;
+
+ size = TARGET_PAGE_ALIGN(size);
+ new_block = qemu_malloc(sizeof(*new_block));
+
+ new_block->host = host;
+
+ new_block->offset = last_ram_offset;
+ new_block->length = size;
+
+ new_block->next = ram_blocks;
+ ram_blocks = new_block;
+
+ phys_ram_dirty = qemu_realloc(phys_ram_dirty,
+ (last_ram_offset + size) >> TARGET_PAGE_BITS);
+ memset(phys_ram_dirty + (last_ram_offset >> TARGET_PAGE_BITS),
+ 0xff, size >> TARGET_PAGE_BITS);
+
+ last_ram_offset += size;
+
+ if (kvm_enabled())
+ kvm_setup_guest_memory(new_block->host, size);
+
+ return new_block->offset;
+}
+
ram_addr_t qemu_ram_alloc(ram_addr_t size)
{
RAMBlock *new_block;
--
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