Paul Mackerras 1659e27d2b KVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list ... Currently the Book 3S KVM code uses kvm->lock to synchronize access to the kvm->arch.rtas_tokens list. Because this list is scanned inside kvmppc_rtas_hcall(), which is called with the vcpu mutex held, taking kvm->lock cause a lock inversion problem, which could lead to a deadlock. To fix this, we add a new mutex, kvm->arch.rtas_token_lock, which nests inside the vcpu mutexes, and use that instead of kvm->lock when accessing the rtas token list. This removes the lockdep_assert_held() in kvmppc_rtas_tokens_free(). At this point we don't hold the new mutex, but that is OK because kvmppc_rtas_tokens_free() is only called when the whole VM is being destroyed, and at that point nothing can be looking up a token in the list. Signed-off-by: Paul Mackerras <paulus@ozlabs.org>		2019-05-29 13:44:36 +10:00
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asm	KVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list	2019-05-29 13:44:36 +10:00
uapi/asm	KVM: PPC: Book3S HV: XIVE: Add a mapping for the source ESB pages	2019-04-30 19:35:16 +10:00