From patchwork Tue Aug 14 23:04:09 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 1324271 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id AB4FCDF266 for ; Tue, 14 Aug 2012 23:07:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754225Ab2HNXH1 (ORCPT ); Tue, 14 Aug 2012 19:07:27 -0400 Received: from cantor2.suse.de ([195.135.220.15]:42706 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753437Ab2HNXEt (ORCPT ); Tue, 14 Aug 2012 19:04:49 -0400 Received: from relay1.suse.de (unknown [195.135.220.254]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx2.suse.de (Postfix) with ESMTP id 7C0B8A329E; Wed, 15 Aug 2012 01:04:48 +0200 (CEST) From: Alexander Graf To: kvm-ppc@vger.kernel.org Cc: KVM list , Liu Yu-B13201 , Liu Yu , Stuart Yoder Subject: [PATCH 04/38] KVM: PPC: Add support for ePAPR idle hcall in host kernel Date: Wed, 15 Aug 2012 01:04:09 +0200 Message-Id: <1344985483-7440-5-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1344985483-7440-1-git-send-email-agraf@suse.de> References: <1344985483-7440-1-git-send-email-agraf@suse.de> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Liu Yu-B13201 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 [stuart.yoder@freescale.com: cleanup,fixes for conditions allowing idle] Signed-off-by: Stuart Yoder [agraf: fix typo] Signed-off-by: Alexander Graf --- Documentation/virtual/kvm/api.txt | 7 +++++-- arch/powerpc/include/asm/Kbuild | 1 + arch/powerpc/kvm/powerpc.c | 10 ++++++++-- 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 bf33aaa..a37ec45 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -1190,12 +1190,15 @@ 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 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 4ff2f27..6645cc7 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; @@ -775,6 +779,8 @@ 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 2ce09aa..c03e59e 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -473,6 +473,8 @@ 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 */