Re: [PATCH v7 16/17] KVM: s390: pv: add KVM_CAP_S390_PROT_REBOOT_ASYNC
From: Janosch Frank
Date: Mon Feb 07 2022 - 10:44:41 EST
On 2/7/22 16:19, Claudio Imbrenda wrote:
On Mon, 7 Feb 2022 15:37:48 +0100
Janosch Frank <frankja@xxxxxxxxxxxxx> wrote:
On 2/4/22 16:53, Claudio Imbrenda wrote:
Add KVM_CAP_S390_PROT_REBOOT_ASYNC 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>
---
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 f7952cef1309..1e696202a569 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -608,6 +608,9 @@ 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_PROT_REBOOT_ASYNC:
+ r = lazy_destroy && is_prot_virt_host();
While reboot might be the best use-case for the async disable I don't
think we should name the capability this way.
KVM_CAP_S390_PROTECTED_ASYNC_DESTR ?
then maybe
KVM_CAP_S390_PROTECTED_ASYNC_DISABLE ?
Sounds good to me
It's a bit long but the initial capability didn't abbreviate the
protected part so it is what it is.
+ 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 7f574c87a6ba..c41c108f6b14 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1134,6 +1134,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_VM_GPA_BITS 207
#define KVM_CAP_XSAVE2 208
#define KVM_CAP_SYS_ATTRIBUTES 209
+#define KVM_CAP_S390_PROT_REBOOT_ASYNC 215
#ifdef KVM_CAP_IRQ_ROUTING