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authorGerd Hoffmann <kraxel@redhat.com>2011-10-14 18:05:48 +0200
committerGerd Hoffmann <kraxel@redhat.com>2012-02-28 17:20:15 +0100
commit6f2b175a090f367c3aab2226c4741b439671307a (patch)
tree156f47bfa8b9839fe159ef464770df705dd18bba /ui
parent81fb6f1504fb9ef71f2382f44af34756668296e8 (diff)
qxl: add optinal 64bit vram bar
This patch adds an 64bit pci bar for vram. It is turned off by default. It can be enabled by setting the size of the 64bit bar to be larger than the 32bit bar. Both 32bit and 64bit bar refer to the same memory. Only the first part of the memory is available via 32bit bar. The intention is to allow large vram sizes for 64bit guests, by allowing the vram bar being mapped above 4G, so we don't have to squeeze it into the pci I/O window below 4G. With vram_size_mb=16 and vram64_size_mb=256 it looks like this: 00:02.0 VGA compatible controller: Red Hat, Inc. Device 0100 (rev 02) (prog-if 00 [VGA controller]) Subsystem: Red Hat, Inc Device 1100 Physical Slot: 2 Flags: fast devsel, IRQ 10 Memory at f8000000 (32-bit, non-prefetchable) [size=64M] Memory at fc000000 (32-bit, non-prefetchable) [size=16M] Memory at fd020000 (32-bit, non-prefetchable) [size=8K] I/O ports at c5a0 [size=32] Memory at ffe0000000 (64-bit, prefetchable) [size=256M] Expansion ROM at fd000000 [disabled] [size=64K] [ mapping above 4G needs patched seabios: http://www.kraxel.org/cgit/seabios/commit/?h=pci64 ]
Diffstat (limited to 'ui')
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