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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2011-08-22 19:12:12 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2011-08-22 14:37:03 -0500 |
| commit | 80763888bfcb89dddb2f4eeece8ffc2ed91bde40 (patch) | |
| tree | 2e83ff9249c33705aa57dea82a98db9792688c6e /hw/mst_fpga.c | |
| parent | fe55ff6e6114c7382a68a2cf7230f125d4f3a248 (diff) | |
| download | focaccia-qemu-80763888bfcb89dddb2f4eeece8ffc2ed91bde40.tar.gz focaccia-qemu-80763888bfcb89dddb2f4eeece8ffc2ed91bde40.zip | |
vga: Use linear mapping + dirty logging in chain 4 memory access mode
Most VGA memory access modes require MMIO handling as they demand weird logic to get a byte from or into the video RAM. However, there is one exception: chain 4 mode with all memory planes enabled for writing. This mode actually allows lineary mapping, which can then be combined with dirty logging to accelerate KVM. This patch accelerates specifically VBE accesses like they are used by grub in graphical mode. Not only the standard VGA adapter benefits from this, also vmware and spice in VGA mode. CC: Gerd Hoffmann <kraxel@redhat.com> CC: Avi Kivity <avi@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/mst_fpga.c')
0 files changed, 0 insertions, 0 deletions