From patchwork Fri Aug 9 08:41:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharata B Rao X-Patchwork-Id: 1144518 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 464f7V40Cxz9sND for ; Fri, 9 Aug 2019 18:49:42 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 464f7S5GkyzDr0d for ; Fri, 9 Aug 2019 18:49:40 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=bharata@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 464dy701tGzDqQf for ; Fri, 9 Aug 2019 18:41:34 +1000 (AEST) Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x798bc0O063090 for ; Fri, 9 Aug 2019 04:41:32 -0400 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0a-001b2d01.pphosted.com with ESMTP id 2u94f62e6x-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 09 Aug 2019 04:41:31 -0400 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 9 Aug 2019 09:41:25 +0100 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x798fN4M41091198 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 9 Aug 2019 08:41:23 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BC1B0A4065; Fri, 9 Aug 2019 08:41:23 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A1344A4054; Fri, 9 Aug 2019 08:41:21 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.85.95.61]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 9 Aug 2019 08:41:21 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v6 3/7] kvmppc: H_SVM_INIT_START and H_SVM_INIT_DONE hcalls Date: Fri, 9 Aug 2019 14:11:04 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190809084108.30343-1-bharata@linux.ibm.com> References: <20190809084108.30343-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19080908-0028-0000-0000-0000038DA5B0 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19080908-0029-0000-0000-0000244FAAD1 Message-Id: <20190809084108.30343-4-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-08-09_02:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908090089 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxram@us.ibm.com, cclaudio@linux.ibm.com, kvm-ppc@vger.kernel.org, Bharata B Rao , linux-mm@kvack.org, jglisse@redhat.com, aneesh.kumar@linux.vnet.ibm.com, paulus@au1.ibm.com, sukadev@linux.vnet.ibm.com, hch@lst.de Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" H_SVM_INIT_START: Initiate securing a VM H_SVM_INIT_DONE: Conclude securing a VM As part of H_SVM_INIT_START, register all existing memslots with the UV. H_SVM_INIT_DONE call by UV informs HV that transition of the guest to secure mode is complete. These two states (transition to secure mode STARTED and transition to secure mode COMPLETED) are recorded in kvm->arch.secure_guest. Setting these states will cause the assembly code that enters the guest to call the UV_RETURN ucall instead of trying to enter the guest directly. Signed-off-by: Bharata B Rao Acked-by: Paul Mackerras --- arch/powerpc/include/asm/hvcall.h | 2 ++ arch/powerpc/include/asm/kvm_book3s_devm.h | 12 ++++++++ arch/powerpc/include/asm/kvm_host.h | 4 +++ arch/powerpc/include/asm/ultravisor-api.h | 1 + arch/powerpc/include/asm/ultravisor.h | 7 +++++ arch/powerpc/kvm/book3s_hv.c | 7 +++++ arch/powerpc/kvm/book3s_hv_devm.c | 34 ++++++++++++++++++++++ 7 files changed, 67 insertions(+) diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index 05b8536f6653..fa7695928e30 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -343,6 +343,8 @@ /* Platform-specific hcalls used by the Ultravisor */ #define H_SVM_PAGE_IN 0xEF00 #define H_SVM_PAGE_OUT 0xEF04 +#define H_SVM_INIT_START 0xEF08 +#define H_SVM_INIT_DONE 0xEF0C /* Values for 2nd argument to H_SET_MODE */ #define H_SET_MODE_RESOURCE_SET_CIABR 1 diff --git a/arch/powerpc/include/asm/kvm_book3s_devm.h b/arch/powerpc/include/asm/kvm_book3s_devm.h index 21f3de5f2acb..8c7aacabb2e0 100644 --- a/arch/powerpc/include/asm/kvm_book3s_devm.h +++ b/arch/powerpc/include/asm/kvm_book3s_devm.h @@ -11,6 +11,8 @@ extern unsigned long kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long gra, unsigned long flags, unsigned long page_shift); +extern unsigned long kvmppc_h_svm_init_start(struct kvm *kvm); +extern unsigned long kvmppc_h_svm_init_done(struct kvm *kvm); #else static inline unsigned long kvmppc_h_svm_page_in(struct kvm *kvm, unsigned long gra, @@ -25,5 +27,15 @@ kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long gra, { return H_UNSUPPORTED; } + +static inline unsigned long kvmppc_h_svm_init_start(struct kvm *kvm) +{ + return H_UNSUPPORTED; +} + +static inline unsigned long kvmppc_h_svm_init_done(struct kvm *kvm) +{ + return H_UNSUPPORTED; +} #endif /* CONFIG_PPC_UV */ #endif /* __POWERPC_KVM_PPC_HMM_H__ */ diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 86bbe607ad7e..1827c22909cd 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -261,6 +261,10 @@ struct kvm_hpt_info { struct kvm_resize_hpt; +/* Flag values for kvm_arch.secure_guest */ +#define KVMPPC_SECURE_INIT_START 0x1 /* H_SVM_INIT_START has been called */ +#define KVMPPC_SECURE_INIT_DONE 0x2 /* H_SVM_INIT_DONE completed */ + struct kvm_arch { unsigned int lpid; unsigned int smt_mode; /* # vcpus per virtual core */ diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h index 1cd1f595fd81..c578d9b13a56 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -25,6 +25,7 @@ /* opcodes */ #define UV_WRITE_PATE 0xF104 #define UV_RETURN 0xF11C +#define UV_REGISTER_MEM_SLOT 0xF120 #define UV_PAGE_IN 0xF128 #define UV_PAGE_OUT 0xF12C diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h index d668a59e099b..8a722c575c56 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -33,4 +33,11 @@ static inline int uv_page_out(u64 lpid, u64 dst_ra, u64 src_gpa, u64 flags, page_shift); } +static inline int uv_register_mem_slot(u64 lpid, u64 start_gpa, u64 size, + u64 flags, u64 slotid) +{ + return ucall_norets(UV_REGISTER_MEM_SLOT, lpid, start_gpa, + size, flags, slotid); +} + #endif /* _ASM_POWERPC_ULTRAVISOR_H */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 00b43ee8b693..33b8ebffbef0 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1089,6 +1089,13 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) kvmppc_get_gpr(vcpu, 5), kvmppc_get_gpr(vcpu, 6)); break; + case H_SVM_INIT_START: + ret = kvmppc_h_svm_init_start(vcpu->kvm); + break; + case H_SVM_INIT_DONE: + ret = kvmppc_h_svm_init_done(vcpu->kvm); + break; + default: return RESUME_HOST; } diff --git a/arch/powerpc/kvm/book3s_hv_devm.c b/arch/powerpc/kvm/book3s_hv_devm.c index c9189e58401d..c55bb5f57928 100644 --- a/arch/powerpc/kvm/book3s_hv_devm.c +++ b/arch/powerpc/kvm/book3s_hv_devm.c @@ -65,6 +65,40 @@ struct kvmppc_devm_copy_args { unsigned long page_shift; }; +unsigned long kvmppc_h_svm_init_start(struct kvm *kvm) +{ + struct kvm_memslots *slots; + struct kvm_memory_slot *memslot; + int ret = H_SUCCESS; + int srcu_idx; + + srcu_idx = srcu_read_lock(&kvm->srcu); + slots = kvm_memslots(kvm); + kvm_for_each_memslot(memslot, slots) { + ret = uv_register_mem_slot(kvm->arch.lpid, + memslot->base_gfn << PAGE_SHIFT, + memslot->npages * PAGE_SIZE, + 0, memslot->id); + if (ret < 0) { + ret = H_PARAMETER; + goto out; + } + } + kvm->arch.secure_guest |= KVMPPC_SECURE_INIT_START; +out: + srcu_read_unlock(&kvm->srcu, srcu_idx); + return ret; +} + +unsigned long kvmppc_h_svm_init_done(struct kvm *kvm) +{ + if (!(kvm->arch.secure_guest & KVMPPC_SECURE_INIT_START)) + return H_UNSUPPORTED; + + kvm->arch.secure_guest |= KVMPPC_SECURE_INIT_DONE; + return H_SUCCESS; +} + /* * Bits 60:56 in the rmap entry will be used to identify the * different uses/functions of rmap. This definition with move