linux-kernel - [PATCH 3/7] powerpc/watchpoint/kvm: Introduce new capability for 2nd DAWR

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Date:   Thu, 23 Jul 2020 15:50:54 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
To:     mpe@...erman.id.au, paulus@...ba.org
Cc:     ravi.bangoria@...ux.ibm.com, mikey@...ling.org, npiggin@...il.com,
        pbonzini@...hat.com, christophe.leroy@....fr, jniethe5@...il.com,
        pedromfc@...ibm.com, rogealve@...ibm.com, kvm@...r.kernel.org,
        kvm-ppc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kselftest@...r.kernel.org
Subject: [PATCH 3/7] powerpc/watchpoint/kvm: Introduce new capability for 2nd DAWR

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@...ux.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 dd7d141e33e8..f38380fd1fe9 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -676,6 +676,9 @@ 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 4fdf30316582..2c3713d6526a 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1031,6 +1031,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_PPC_SECURE_GUEST 181
 #define KVM_CAP_HALT_POLL 182
 #define KVM_CAP_ASYNC_PF_INT 183
+#define KVM_CAP_PPC_DAWR1 184
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
2.26.2