lkml.org 
[lkml]   [2021]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 2/2] s390:kvm: Topology expose TOPOLOGY facility
Date
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
\
 
 \ /
  Last update: 2021-07-22 19:36    [W:0.092 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site