Re: [PATCH v14 3/6] KVM: s390: pv: add KVM_CAP_S390_PROTECTED_ASYNC_DISABLE
From: Janosch Frank
Date: Mon Oct 10 2022 - 09:10:49 EST
On 10/10/22 14:15, Claudio Imbrenda wrote:
On Mon, 10 Oct 2022 13:45:54 +0200
Janosch Frank <frankja@xxxxxxxxxxxxx> wrote:
On 9/30/22 16:01, Claudio Imbrenda wrote:
Add KVM_CAP_S390_PROTECTED_ASYNC_DISABLE to signal that the
KVM_PV_ASYNC_DISABLE and KVM_PV_ASYNC_DISABLE_PREPARE commands for the
KVM_S390_PV_COMMAND ioctl are available.
Signed-off-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Reviewed-by: Nico Boehr <nrb@xxxxxxxxxxxxx>
---
arch/s390/kvm/kvm-s390.c | 3 +++
include/uapi/linux/kvm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index d0027964a6f5..7a3bd68efd85 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -618,6 +618,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_BPB:
r = test_facility(82);
break;
+ case KVM_CAP_S390_PROTECTED_ASYNC_DISABLE:
+ r = async_destroy && is_prot_virt_host();
+ break;
case KVM_CAP_S390_PROTECTED:
r = is_prot_virt_host();
break;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 02602c5c1975..9afe0084b2c5 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1177,6 +1177,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_VM_DISABLE_NX_HUGE_PAGES 220
#define KVM_CAP_S390_ZPCI_OP 221
#define KVM_CAP_S390_CPU_TOPOLOGY 222
+#define KVM_CAP_S390_PROTECTED_ASYNC_DISABLE 225
I can see 223 in Paolo's next, is there a 224 that I've missed?
no, I set this to an arbitrarily high value to avoid conficts
seems like I got it more or less right :)
feel free to change the value of the macro when merging, so it's
contiguous.
Reviewed-by: Janosch Frank <frankja@xxxxxxxxxxxxx>