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

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Date:	Fri, 9 Oct 2009 16:08:24 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>
CC:	Alexander Graf <agraf@...e.de>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/9 v3] KVM: Nested SVM fixes and tracepoint conversion

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


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