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Re: [Qemu-devel] [PATCH 15/30] memory: add address_space_valid

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 15/30] memory: add address_space_valid
Date: Fri, 24 May 2013 15:33:28 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6

Il 24/05/2013 15:27, Peter Maydell ha scritto:
> On 24 May 2013 13:58, Paolo Bonzini <address@hidden> wrote:
>> If it's okay
>> for you, I'll send a pull request up to "memory: clean up phys_page_find"
>> and go on with the next series.
> That's fine with me, but please don't forget to fix up
> the doc comment for memory_region_find() (see comments on
> patch 6/30). You can do that in a patch in the next series,
> though, I guess.

What about this:

 * memory_region_find: translate an address/size relative to a
 * MemoryRegion into a #MemoryRegionSection.
 * Locates the first #MemoryRegion within @mr that overlaps the range
 * given by @addr and @size.
 * Returns a #MemoryRegionSection that describes a contiguous overlap.
 * It will have the following characteristics:
 *    address@hidden = 0 iff no overlap was found
 *    address@hidden is non-%NULL iff an overlap was found
 * Remember that in the return value the @offset_within_region is
 * relative to the returned region (in the address@hidden field), not to the
 * @mr argument.
 * Similarly, the address@hidden is relative to the
 * address space that contains both regions, the passed and the
 * returned one.  However, in the special case where the @mr argument
 * has no parent (and thus is the root of the address space), the
 * following will hold:
 *    address@hidden >= @addr
 *    address@hidden + address@hidden <= @addr + @size
 * @mr: a MemoryRegion within which @addr is a relative address
 * @addr: start of the area within @as to be searched
 * @size: size of the area to be searched


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