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| author |   Avi Kivity <avi@redhat.com> | 2010-04-08 18:19:35 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-04-20 12:59:31 +0300 |
| commit | 78ac8b47c566dd6177a3b9b291b756ccb70670b7 (patch) | |
| tree | 46feb3a7845c7e4a3d0c621d17b3f2593e7d756f /virt | |
| parent | KVM: allow bit 10 to be cleared in MSR_IA32_MC4_CTL (diff) | |
| download | linux-dev-78ac8b47c566dd6177a3b9b291b756ccb70670b7.tar.xz linux-dev-78ac8b47c566dd6177a3b9b291b756ccb70670b7.zip | |
KVM: VMX: Save/restore rflags.vm correctly in real mode
Currently we set eflags.vm unconditionally when entering real mode emulation
through virtual-8086 mode, and clear it unconditionally when we enter protected
mode. The means that the following sequence
KVM_SET_REGS (rflags.vm=1)
KVM_SET_SREGS (cr0.pe=1)
Ends up with rflags.vm clear due to KVM_SET_SREGS triggering enter_pmode().
Fix by shadowing rflags.vm (and rflags.iopl) correctly while in real mode:
reads and writes to those bits access a shadow register instead of the actual
register.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions