| commit | 55934c0bd3bb232a9cf902820dd63ad18ed65e49 | |
| author | Jan Kiszka <jan.kiszka@siemens.com> | |
| Mon, 15 Dec 2008 12:52:10 +0000 (15 13:52 +0100) | ||
| committer | Avi Kivity <avi@redhat.com> | |
| Tue, 24 Mar 2009 09:02:49 +0000 (24 11:02 +0200) | ||
| tree | 172644d0cc14e359a8e45a24d247b5180914b968 | treesnapshot (tar.gz zip) |
| parent | d0bfb940ecabf0b44fb1fd80d8d60594e569e5ec | commitdiff |
KVM: VMX: Allow single-stepping when uninterruptible
When single-stepping over STI and MOV SS, we must clear the
corresponding interruptibility bits in the guest state. Otherwise
vmentry fails as it then expects bit 14 (BS) in pending debug exceptions
being set, but that's not correct for the guest debugging case.
Note that clearing those bits is safe as we check for interruptibility
based on the original state and do not inject interrupts or NMIs if
guest interruptibility was blocked.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
When single-stepping over STI and MOV SS, we must clear the
corresponding interruptibility bits in the guest state. Otherwise
vmentry fails as it then expects bit 14 (BS) in pending debug exceptions
being set, but that's not correct for the guest debugging case.
Note that clearing those bits is safe as we check for interruptibility
based on the original state and do not inject interrupts or NMIs if
guest interruptibility was blocked.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| arch/x86/kvm/vmx.c | diffblobblamehistory |