Displaying 3 results from an estimated 3 matches for "debug_state_latch".
2009 May 11
9
vmx_update_guest_cr() losing EXCEPTION_BITMAP setting
Running a heavily modified xen-unstable changset 19590:f80cf52a4fb6 with debugger_attached set, I was seeing the debug traps getting lost from the EXCEPTION_BITMAP in vmx_update_guest_cr() when transitioning from real to protected mode. In my codebase, I could fix this trivially by clearing the debug_state_latch and letting vmx_do_resume() reapply the setting. However, while it looks like a valid issue in the unmodified codebase, I''m not sure. So maybe someone might test/examine it and decide if it is real and whether some more complex fix is required?
John Byrne
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2010 Aug 05
6
[PATCH 10/14] Nested Virtualization: svm specific implementation
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
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2010 Dec 15
5
[PATCH] svm: support VMCB cleanbits
Hi,
Attached patch implements the VMCB cleanbits SVM feature.
Upcoming AMD CPUs introduce them and they are basically hints
for the CPU which vmcb values can be re-used from the previous
VMRUN instruction.
Each bit represents a certain set of fields in the VMCB.
Setting a bit tells the cpu it can re-use the cached value
from the previous VMRUN.
Clearing a bit tells the cpu to reload the values