[Qemu-devel] phys_page_find bug?

[Artyom Tarasenko <atar4qemu@googlemail.com>]

phys_page_find (exec.c) returns sometimes a page for addresses where
nothing is connected.

One example, done with qemu-system-sparc -M SS-20

ok f13ffff0 2f spacec@ .

// The address translates correctly, in cpu_physical_memory_rw
// addr== 0xff13ffff0 (where nothing is connected)
// but then phys_page_find returns a nonzero and produces

Unassigned mem read access of 1 byte to 0000000ff15ffff0 from xxxxx

(note the "5" in the line above where "3" is expected)

I wonder if this is only true for non-wired addresses, or whether
phys_page_find can also
find wrong pages for the addresses where something is connected?

Or is my assumption is wrong and phys_page_find can return a page for
not-connected
addresses and the bug is actually in cpu_physical_memory_rw ?

Is the qemu algorithm of working with the physical address space
described somewhere?

-- 
Regards,
Artyom Tarasenko

solaris/sparc under qemu blog: http://tyom.blogspot.com/