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| author | Luca Tettamanti <kronos.it@gmail.com> | 2007-06-19 22:41:20 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-07-16 12:05:48 +0300 |
| commit | 02c03a326a5df825cc01de426f72e160db2b9538 (patch) | |
| tree | 6b6e765fbe03832a7fd68c4c28e7f105875d40ed /README | |
| parent | 74906345ff9f84f2b3b772d368c7e49f4ba27456 (diff) | |
| download | talos-op-linux-02c03a326a5df825cc01de426f72e160db2b9538.tar.gz talos-op-linux-02c03a326a5df825cc01de426f72e160db2b9538.zip | |
KVM: Fix x86 emulator writeback
When the old value and new one are the same the emulator skips the
write; this is undesirable when the destination is a MMIO area and the
write shall be performed regardless of the previous value. This
optimization breaks e.g. a Linux guest APIC compiled without
X86_GOOD_APIC.
Remove the check and perform the writeback stage in the emulation unless
it's explicitly disabled (currently push and some 2 bytes instructions
may disable the writeback).
Signed-Off-By: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions
