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[Qemu-devel] MMIO coalescing of the i82378 bridge

From: Jan Kiszka
Subject: [Qemu-devel] MMIO coalescing of the i82378 bridge
Date: Sat, 23 Jun 2012 11:28:00 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv: Gecko/20080226 SUSE/ Thunderbird/ Mnenhy/

Hi all,

just stumbled over the memory_region_set_coalescing in pci_i82378_init:
What ISA devices are affected by this? It looks a bit strange to me as
the MMIO requests are apparently mapped on PIO requests, and we don't
have PIO coalescing on x86. Depending on the target device on PREP, this
may have some unexpected side effects. Or is only framebuffer memory
addressed this way?


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