linux-kernel - [PATCH 0/10] KVM: Nested SVM fixes and tracepoint conversion

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Date:	Wed, 7 Oct 2009 16:31:18 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/10] 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 (1/10) 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 patches 2/10 and 3/10 fixing 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 to 3) should also be considered for -stable
backporting.

The patches 3 to 9 convert the old printk based debugging for Nested
SVM to tracepoints. Patch 10 removes the nsvm_printk code. Please review
and/or consider to apply these changes.

Thanks,

	Joerg

diffstat:

 arch/x86/include/asm/kvm_host.h |    1 +
 arch/x86/kvm/svm.c              |   98 +++++++++++++++---------
 arch/x86/kvm/trace.h            |  165 +++++++++++++++++++++++++++++++++++++++
 arch/x86/kvm/x86.c              |   23 ++++++
 include/linux/kvm_host.h        |    1 +
 5 files changed, 252 insertions(+), 36 deletions(-)

shortlog:

Alexander Graf (1):
      KVM: SVM: Notify nested hypervisor of lost event injections

Joerg Roedel (9):
      KVM: X86: Add KVM_REQ_VMEXIT to trigger a nested #vmexit
      KVM: SVM: Move nested INTR #vmexit into preemtible 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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