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Re: [Qemu-devel] [RFC 1/4] Allocate non-RAM MemoryRegion from user point

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [RFC 1/4] Allocate non-RAM MemoryRegion from user pointer
Date: Wed, 30 Apr 2014 12:23:13 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

Il 17/04/2014 19:29, Alvise Rigo ha scritto:
+void memory_region_init_ptr(MemoryRegion *mr,
+                                Object *owner,
+                                const char *name,
+                                uint64_t size,
+                                void *ptr)
+    memory_region_init(mr, owner, name, size);
+    mr->terminates = true;
+    mr->destructor = memory_region_destructor_ram_from_ptr;
+    mr->ram_addr = qemu_ram_alloc_from_ptr(size, ptr, mr);
+    mr->alloc_from_ptr = true;

I don't understand. How is this different from memory_region_init_ram_ptr, and why should the IOMMU be bypassed?


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