Re: [PATCH v4 2/3] KVM: PPC: epapr: Add idle hcall support for host

And add a new flag definition in kvm_ppc_pvinfo to indicate
whether host support EV_IDLE hcall.
=20
Signed-off-by: Liu Yu <redacted>
---
v4:
no change
=20
arch/powerpc/include/asm/kvm_para.h |   14 ++++++++++++--
arch/powerpc/kvm/powerpc.c          |    8 ++++++++
include/linux/kvm.h                 |    2 ++
3 files changed, 22 insertions(+), 2 deletions(-)
=20

diff --git a/arch/powerpc/include/asm/kvm_para.h b/arch/powerpc/include/as=

index 7b754e7..81a34c9 100644

--- a/arch/powerpc/include/asm/kvm_para.h
+++ b/arch/powerpc/include/asm/kvm_para.h

@@ -75,9 +75,19 @@ struct kvm_vcpu_arch_shared {

};
=20
#define KVM_SC_MAGIC_R0        0x4b564d21 /* "KVM!" */
-#define HC_VENDOR_KVM        (42 << 16)
+
+#include <asm/epapr_hcalls.h>
+
+/* ePAPR Hypercall Vendor ID */
+#define HC_VENDOR_EPAPR        (EV_EPAPR_VENDOR_ID << 16)
+#define HC_VENDOR_KVM        (EV_KVM_VENDOR_ID << 16)
+
+/* ePAPR Hypercall Token */
+#define HC_EV_IDLE        EV_IDLE
+
+/* ePAPR Hypercall Return Codes */
#define HC_EV_SUCCESS        0
-#define HC_EV_UNIMPLEMENTED    12
+#define HC_EV_UNIMPLEMENTED    EV_UNIMPLEMENTED
=20
#define KVM_FEATURE_MAGIC_PAGE    1
=20

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 0e21d15..03ebd5d 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c

@@ -81,6 +81,10 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)

=20
       /* Second return value is in r4 */
       break;
+    case HC_VENDOR_EPAPR | HC_EV_IDLE:
+        r =3D HC_EV_SUCCESS;
+        kvm_vcpu_block(vcpu);
+        break;
   default:
       r =3D HC_EV_UNIMPLEMENTED;
       break;

@@ -746,6 +750,10 @@ static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvi=

+    pvinfo->flags |=3D KVM_PPC_PVINFO_FLAGS_EV_IDLE;
+#endif
+
   return 0;
}
=20

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index acbe429..6b2c70e 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h

@@ -449,6 +449,8 @@ struct kvm_ppc_pvinfo {
   __u8  pad[108];

};
=20
+#define KVM_PPC_PVINFO_FLAGS_EV_IDLE   (1<<0)
+
#define KVMIO 0xAE
=20
/* machine type bits, to be used as argument to KVM_CREATE_VM */
--=20
1.7.0.4
=20
=20
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