From: Liu Yu-B13201 <yu....@freescale.com>
And add a new flag definition in kvm_ppc_pvinfo to indicate
whether the host supports the EV_IDLE hcall.
Signed-off-by: Liu Yu <yu....@freescale.com>
[stuart.yo...@freescale.com: cleanup,fixes for conditions allowing idle]
Signed-off-by: Stuart Yoder <stuart.yo...@freescale.com>
---
-v10:
-ePAPR definitions now addressed in separate patch
-move clearing of KVM_REQ_UNHALT after kvm_vcpu_block() call
arch/powerpc/include/asm/Kbuild | 1 +
arch/powerpc/kvm/powerpc.c | 20 +++++++++++++++++---
include/linux/kvm.h | 2 ++
3 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild
index 7e313f1..13d6b7b 100644
--- a/arch/powerpc/include/asm/Kbuild
+++ b/arch/powerpc/include/asm/Kbuild
@@ -34,5 +34,6 @@ header-y += termios.h
header-y += types.h
header-y += ucontext.h
header-y += unistd.h
+header-y += epapr_hcalls.h
generic-y += rwsem.h
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index d738626..7c4e5cc 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -38,8 +38,7 @@
int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
- return !(v->arch.shared->msr & MSR_WE) ||
- !!(v->arch.pending_exceptions) ||
+ return !!(v->arch.pending_exceptions) ||
v->requests;
}
@@ -86,6 +85,11 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
/* Second return value is in r4 */
break;
+ case _EV_HCALL_TOKEN(EV_EPAPR_VENDOR_ID, EV_IDLE):
+ r = 0; /* success */
+ kvm_vcpu_block(vcpu);
+ clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
+ break;
default:
r = EV_UNIMPLEMENTED;
break;
@@ -732,9 +736,16 @@ int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct
vm_fault *vmf)
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
+ u32 inst_nop = 0x60000000;
+#ifdef CONFIG_KVM_BOOKE_HV
+ u32 inst_sc1 = 0x44000022;
+ pvinfo->hcall[0] = inst_sc1;
+ pvinfo->hcall[1] = inst_nop;
+ pvinfo->hcall[2] = inst_nop;
+ pvinfo->hcall[3] = inst_nop;
+#else
u32 inst_lis = 0x3c000000;
u32 inst_ori = 0x60000000;
- u32 inst_nop = 0x60000000;
u32 inst_sc = 0x44000002;
u32 inst_imm_mask = 0xffff;
@@ -751,6 +762,9 @@ static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo
*pvinfo)
pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
pvinfo->hcall[2] = inst_sc;
pvinfo->hcall[3] = inst_nop;
+#endif
+
+ pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
return 0;
}
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 7a9dd4b..640ec5a 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -449,6 +449,8 @@ struct kvm_ppc_pvinfo {
__u8 pad[108];
};
+#define KVM_PPC_PVINFO_FLAGS_EV_IDLE (1<<0)
+
#define KVMIO 0xAE
/* machine type bits, to be used as argument to KVM_CREATE_VM */
--
1.7.3.4
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