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Date:   Thu, 23 May 2019 16:34:24 +1000
From:   Paul Mackerras <paulus@ozlabs.org>
To:     kvm@vger.kernel.org
Cc:     kvm-ppc@vger.kernel.org,
        =?iso-8859-1?Q?C=E9dric?= Le Goater <clg@kaod.org>
Subject: [PATCH 0/4] KVM: PPC: Book3S: Fix potential deadlocks
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Recent reports of lockdep splats in the HV KVM code revealed that it
was taking the kvm->lock mutex in several contexts where a vcpu mutex
was already held.  Lockdep has only started warning since I added code
to take the vcpu mutexes in the XIVE device release functions, but
since Documentation/virtual/kvm/locking.txt specifies that the vcpu
mutexes nest inside kvm->lock, it seems that the new code is correct
and it is most of the old uses of kvm->lock that are wrong.

This series should fix the problems, by adding new mutexes that nest
inside the vcpu mutexes and using them instead of kvm->lock.

Paul.