[PATCH 0/9 v3] KVM: Nested SVM fixes and tracepoint conversion

[Joerg Roedel <joerg.roedel@amd.com>]

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 might 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 v2:

* Fixed typo in trace_printk message for invlpga
* Converted "key=value" strings into "key: value"

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