Patch "KVM: Provide function for VCPU lookup by id" has been added to the 4.1-stable tree

Patch "KVM: Provide function for VCPU lookup by id" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    KVM: Provide function for VCPU lookup by id

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     kvm-provide-function-for-vcpu-lookup-by-id.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From db27a7a37aa0b1f8b373f8b0fb72a2ccaafb85b7 Mon Sep 17 00:00:00 2001
From: David Hildenbrand <dahi@linux.vnet.ibm.com>
Date: Thu, 5 Nov 2015 09:03:50 +0100
Subject: KVM: Provide function for VCPU lookup by id

From: David Hildenbrand <dahi@linux.vnet.ibm.com>

commit db27a7a37aa0b1f8b373f8b0fb72a2ccaafb85b7 upstream.

Let's provide a function to lookup a VCPU by id.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[split patch from refactoring patch]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/linux/kvm_host.h |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -423,6 +423,17 @@ static inline struct kvm_vcpu *kvm_get_v
 	     (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 	     idx++)
 
+static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
+{
+	struct kvm_vcpu *vcpu;
+	int i;
+
+	kvm_for_each_vcpu(i, vcpu, kvm)
+		if (vcpu->vcpu_id == id)
+			return vcpu;
+	return NULL;
+}
+
 #define kvm_for_each_memslot(memslot, slots)	\
 	for (memslot = &slots->memslots[0];	\
 	      memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\


Patches currently in stable-queue which might be from dahi@linux.vnet.ibm.com are

queue-4.1/kvm-s390-sca-must-not-cross-page-boundaries.patch
queue-4.1/kvm-s390-enable-simd-only-when-no-vcpus-were-created.patch
queue-4.1/kvm-s390-fix-wrong-lookup-of-vcpus-by-array-index.patch
queue-4.1/kvm-provide-function-for-vcpu-lookup-by-id.patch
queue-4.1/kvm-s390-avoid-memory-overwrites-on-emergency-signal-injection.patch