Hi Avi, Marcelo,
this series of patches contains bugfixes for the Nested SVM code and the
conversion of Nested SVM debugging to tracepoints. The fixes are:
1) A patch Alex already sent (1/9) but which was not yet
applied. It fixes a lost event_inj problem when we emulate
a vmrun and a vmexit without entering the guest in
the meantime.
2) The patch 2/9 fixes a schedule() while atomic bug in the
Nested SVM code. The KVM interrupt injection code runs
with preemtion and interrupts disabled. But the
enable_irq_window() function from SVM may emulate a
#vmexit. This emulation migth sleep which causes the
schedule() while atomic() bug.
These fixes (patches 1 and 2) should also be considered for -stable
backporting.
The patches 3 to 8 convert the old printk based debugging for Nested SVM
to tracepoints. Patch 9 removes the nsvm_printk code. Please review
and/or consider to apply these changes.
Thanks,
Joerg
Changes to v1:
* Fixed typo on comment in patch
"KVM: SVM: Notify nested hypervisor of lost event injections"
* Made the fix for the schedule()-while-atomic bug out of the generic
code. It touches only SVM code now.
diffstat:
arch/x86/kvm/svm.c | 107 +++++++++++++++++++++-----------
arch/x86/kvm/trace.h | 165 ++++++++++++++++++++++++++++++++++++++++++++++++++
arch/x86/kvm/x86.c | 6 ++
3 files changed, 242 insertions(+), 36 deletions(-)
shortlog:
Alexander Graf (1):
KVM: SVM: Notify nested hypervisor of lost event injections
Joerg Roedel (8):
KVM: SVM: Move INTR vmexit out of atomic code
KVM: SVM: Add tracepoint for nested vmrun
KVM: SVM: Add tracepoint for nested #vmexit
KVM: SVM: Add tracepoint for injected #vmexit
KVM: SVM: Add tracepoint for #vmexit because intr pending
KVM: SVM: Add tracepoint for invlpga instruction
KVM: SVM: Add tracepoint for skinit instruction
KVM: SVM: Remove nsvm_printk debugging code
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