From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: pgonda@google.com
Subject: [PATCH 11/12] KVM: SEV: do not take kvm->lock when destroying
Date: Mon, 22 Nov 2021 19:50:35 -0500 [thread overview]
Message-ID: <20211123005036.2954379-12-pbonzini@redhat.com> (raw)
In-Reply-To: <20211123005036.2954379-1-pbonzini@redhat.com>
Taking the lock is useless since there are no other references,
and there are already accesses (e.g. to sev->enc_context_owner)
that do not take it. So get rid of it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/svm/sev.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 89a716290fac..bbbf980c7e40 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2048,8 +2048,6 @@ void sev_vm_destroy(struct kvm *kvm)
return;
}
- mutex_lock(&kvm->lock);
-
/*
* Ensure that all guest tagged cache entries are flushed before
* releasing the pages back to the system for use. CLFLUSH will
@@ -2069,8 +2067,6 @@ void sev_vm_destroy(struct kvm *kvm)
}
}
- mutex_unlock(&kvm->lock);
-
sev_unbind_asid(kvm, sev->handle);
sev_asid_free(sev);
}
--
2.27.0
next prev parent reply other threads:[~2021-11-23 0:51 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 0:50 [PATCH 00/12] Fixes for KVM_CAP_VM_MOVE/COPY_ENC_CONTEXT_FROM Paolo Bonzini
2021-11-23 0:50 ` [PATCH 01/12] selftests: fix check for circular KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM Paolo Bonzini
2021-12-01 15:52 ` Peter Gonda
2021-11-23 0:50 ` [PATCH 02/12] selftests: sev_migrate_tests: free all VMs Paolo Bonzini
2021-12-01 15:54 ` Peter Gonda
2021-11-23 0:50 ` [PATCH 03/12] KVM: SEV: expose KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM capability Paolo Bonzini
2021-11-29 22:28 ` Sean Christopherson
2021-12-01 15:55 ` Peter Gonda
2021-11-23 0:50 ` [PATCH 04/12] KVM: SEV: do not use list_replace_init on an empty list Paolo Bonzini
2021-11-29 22:27 ` Sean Christopherson
2021-11-23 0:50 ` [PATCH 05/12] KVM: SEV: cleanup locking for KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM Paolo Bonzini
2021-12-01 16:11 ` Peter Gonda
2021-11-23 0:50 ` [PATCH 06/12] KVM: SEV: initialize regions_list of a mirror VM Paolo Bonzini
2021-11-29 23:00 ` Sean Christopherson
2021-11-23 0:50 ` [PATCH 07/12] KVM: SEV: move mirror status to destination of KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM Paolo Bonzini
2021-11-29 23:02 ` Sean Christopherson
2021-11-23 0:50 ` [PATCH 08/12] selftests: sev_migrate_tests: add tests for KVM_CAP_VM_COPY_ENC_CONTEXT_FROM Paolo Bonzini
2021-12-01 18:09 ` Peter Gonda
2021-12-07 20:11 ` Peter Gonda
2021-11-23 0:50 ` [PATCH 09/12] KVM: SEV: Do COPY_ENC_CONTEXT_FROM with both VMs locked Paolo Bonzini
2021-11-29 23:08 ` Sean Christopherson
2021-11-23 0:50 ` [PATCH 10/12] KVM: SEV: Prohibit migration of a VM that has mirrors Paolo Bonzini
2021-11-29 22:54 ` Sean Christopherson
2021-12-01 18:17 ` Peter Gonda
2021-12-01 18:21 ` Paolo Bonzini
2021-11-23 0:50 ` Paolo Bonzini [this message]
2021-11-29 22:31 ` [PATCH 11/12] KVM: SEV: do not take kvm->lock when destroying Sean Christopherson
2021-11-23 0:50 ` [PATCH 12/12] KVM: SEV: accept signals in sev_lock_two_vms Paolo Bonzini
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