From: Pierre Morel <pmorel@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
borntraeger@de.ibm.com, frankja@linux.ibm.com, cohuck@redhat.com,
david@redhat.com, thuth@redhat.com, imbrenda@linux.ibm.com,
hca@linux.ibm.com, gor@linux.ibm.com, pmorel@linux.ibm.com
Subject: [PATCH v2 2/2] s390:kvm: Topology expose TOPOLOGY facility
Date: Thu, 22 Jul 2021 19:02:33 +0200 [thread overview]
Message-ID: <1626973353-17446-3-git-send-email-pmorel@linux.ibm.com> (raw)
In-Reply-To: <1626973353-17446-1-git-send-email-pmorel@linux.ibm.com>
We add a KVM extension KVM_CAP_S390_CPU_TOPOLOGY to tell the
userland hypervisor it is safe to activate the CPU Topology facility.
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
---
arch/s390/kvm/kvm-s390.c | 1 +
include/uapi/linux/kvm.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index b655a7d82bf0..8c695ee79612 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -568,6 +568,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_VCPU_RESETS:
case KVM_CAP_SET_GUEST_DEBUG:
case KVM_CAP_S390_DIAG318:
+ case KVM_CAP_S390_CPU_TOPOLOGY:
r = 1;
break;
case KVM_CAP_SET_GUEST_DEBUG2:
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index d9e4aabcb31a..081ce0cd44b9 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1112,6 +1112,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_BINARY_STATS_FD 203
#define KVM_CAP_EXIT_ON_EMULATION_FAILURE 204
#define KVM_CAP_ARM_MTE 205
+#define KVM_CAP_S390_CPU_TOPOLOGY 206
#ifdef KVM_CAP_IRQ_ROUTING
--
2.25.1
next prev parent reply other threads:[~2021-07-22 17:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-22 17:02 [PATCH v2 0/2] s390x: KVM: CPU Topology Pierre Morel
2021-07-22 17:02 ` [PATCH v2 1/2] s390x: KVM: accept STSI for CPU topology information Pierre Morel
2021-07-23 8:34 ` Christian Borntraeger
2021-07-22 17:02 ` Pierre Morel [this message]
2021-07-23 8:14 ` [PATCH v2 2/2] s390:kvm: Topology expose TOPOLOGY facility Christian Borntraeger
2021-07-23 8:55 ` Cornelia Huck
2021-07-23 9:28 ` Christian Borntraeger
2021-07-23 10:10 ` Pierre Morel
2021-07-23 10:24 ` Christian Borntraeger
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