From: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
To: mpe@ellerman.id.au, paulus@samba.org
Cc: ravi.bangoria@linux.ibm.com, mikey@neuling.org,
npiggin@gmail.com, leobras.c@gmail.com, pbonzini@redhat.com,
christophe.leroy@c-s.fr, jniethe5@gmail.com, kvm@vger.kernel.org,
kvm-ppc@vger.kernel.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 4/4] KVM: PPC: Introduce new capability for 2nd DAWR
Date: Tue, 24 Nov 2020 16:29:53 +0530 [thread overview]
Message-ID: <20201124105953.39325-5-ravi.bangoria@linux.ibm.com> (raw)
In-Reply-To: <20201124105953.39325-1-ravi.bangoria@linux.ibm.com>
Introduce KVM_CAP_PPC_DAWR1 which can be used by Qemu to query whether
kvm supports 2nd DAWR or not.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
arch/powerpc/kvm/powerpc.c | 3 +++
include/uapi/linux/kvm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 13999123b735..48763fe59fc5 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -679,6 +679,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
!kvmppc_hv_ops->enable_svm(NULL);
break;
#endif
+ case KVM_CAP_PPC_DAWR1:
+ r = cpu_has_feature(CPU_FTR_DAWR1);
+ break;
default:
r = 0;
break;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index f6d86033c4fa..0f32d6cbabc2 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1035,6 +1035,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_LAST_CPU 184
#define KVM_CAP_SMALLER_MAXPHYADDR 185
#define KVM_CAP_S390_DIAG318 186
+#define KVM_CAP_PPC_DAWR1 187
#ifdef KVM_CAP_IRQ_ROUTING
--
2.26.2
next prev parent reply other threads:[~2020-11-24 11:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-24 10:59 [PATCH v2 0/4] KVM: PPC: Power10 2nd DAWR enablement Ravi Bangoria
2020-11-24 10:59 ` [PATCH v2 1/4] KVM: PPC: Allow nested guest creation when L0 hv_guest_state > L1 Ravi Bangoria
2020-12-09 14:25 ` Fabiano Rosas
2020-11-24 10:59 ` [PATCH v2 2/4] KVM: PPC: Rename current DAWR macros and variables Ravi Bangoria
2020-11-24 10:59 ` [PATCH v2 3/4] KVM: PPC: Add infrastructure to support 2nd DAWR Ravi Bangoria
2020-11-24 10:59 ` Ravi Bangoria [this message]
2020-12-09 4:36 ` [PATCH v2 4/4] KVM: PPC: Introduce new capability for " Paul Mackerras
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