diff options
| author | Liu Yu-B13201 <Yu.Liu@freescale.com> | 2012-07-03 05:48:52 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2012-10-05 23:38:37 +0200 |
| commit | 9202e07636f0c4858ba6c30773a3f160b2b5659a (patch) | |
| tree | 8dc71ab432097c3cfbad47157d66788e02d1f219 | |
| parent | 784bafac79e7646e56f40998a6dde0e1ed5595f8 (diff) | |
KVM: PPC: Add support for ePAPR idle hcall in host kernel
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.liu@freescale.com>
[stuart.yoder@freescale.com: cleanup,fixes for conditions allowing idle]
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
[agraf: fix typo]
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 7 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 10 | ||||
| -rw-r--r-- | include/linux/kvm.h | 2 |
4 files changed, 16 insertions, 4 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index f6ec3a92e621..170afb1fbc2e 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -1194,12 +1194,15 @@ struct kvm_ppc_pvinfo { This ioctl fetches PV specific information that need to be passed to the guest using the device tree or other means from vm context. -For now the only implemented piece of information distributed here is an array -of 4 instructions that make up a hypercall. +The hcall array defines 4 instructions that make up a hypercall. If any additional field gets added to this structure later on, a bit for that additional piece of information will be set in the flags bitmap. +The flags bitmap is defined as: + + /* the host supports the ePAPR idle hcall + #define KVM_PPC_PVINFO_FLAGS_EV_IDLE (1<<0) 4.48 KVM_ASSIGN_PCI_DEVICE diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild index 7e313f1ed183..13d6b7bf3b69 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 a478e662b2bc..dbf56e173c25 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_IDLE): + r = EV_SUCCESS; + kvm_vcpu_block(vcpu); + clear_bit(KVM_REQ_UNHALT, &vcpu->requests); + break; default: r = EV_UNIMPLEMENTED; break; @@ -779,6 +783,8 @@ static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) 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 0a6d6ba44c85..4cb3761bebae 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -477,6 +477,8 @@ struct kvm_ppc_smmu_info { struct kvm_ppc_one_seg_page_size sps[KVM_PPC_PAGE_SIZES_MAX_SZ]; }; +#define KVM_PPC_PVINFO_FLAGS_EV_IDLE (1<<0) + #define KVMIO 0xAE /* machine type bits, to be used as argument to KVM_CREATE_VM */ |