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Thu, 18 Jun 2020 09:19:43 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1A95F42049; Thu, 18 Jun 2020 09:19:41 +0000 (GMT) Received: from oc0525413822.ibm.com (unknown [9.211.71.42]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 18 Jun 2020 09:19:40 +0000 (GMT) From: Ram Pai To: kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 4/4] KVM: PPC: Book3S HV: migrate hot plugged memory Date: Thu, 18 Jun 2020 02:19:05 -0700 Message-Id: <1592471945-24786-5-git-send-email-linuxram@us.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1592471945-24786-1-git-send-email-linuxram@us.ibm.com> References: <1592471945-24786-1-git-send-email-linuxram@us.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-18_04:2020-06-17, 2020-06-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 priorityscore=1501 cotscore=-2147483648 mlxscore=0 clxscore=1015 suspectscore=2 mlxlogscore=999 malwarescore=0 bulkscore=0 adultscore=0 spamscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006180065 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: ldufour@linux.ibm.com, linuxram@us.ibm.com, cclaudio@linux.ibm.com, bharata@linux.ibm.com, sathnaga@linux.vnet.ibm.com, aneesh.kumar@linux.ibm.com, sukadev@linux.vnet.ibm.com, bauerman@linux.ibm.com, david@gibson.dropbear.id.au Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Laurent Dufour When a memory slot is hot plugged to a SVM, PFNs associated with the GFNs in that slot must be migrated to the secure-PFNs, aka device-PFNs. kvmppc_uv_migrate_mem_slot() is called to accomplish this. UV_PAGE_IN ucall is skipped, since the ultravisor does not trust the content of those pages and hence ignores it. Signed-off-by: Ram Pai [resolved conflicts, and modified the commit log] Signed-off-by: Laurent Dufour --- arch/powerpc/include/asm/kvm_book3s_uvmem.h | 2 ++ arch/powerpc/kvm/book3s_hv.c | 10 ++++++---- arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +- 3 files changed, 9 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_book3s_uvmem.h b/arch/powerpc/include/asm/kvm_book3s_uvmem.h index f0c5708..05ae789 100644 --- a/arch/powerpc/include/asm/kvm_book3s_uvmem.h +++ b/arch/powerpc/include/asm/kvm_book3s_uvmem.h @@ -23,6 +23,8 @@ unsigned long kvmppc_h_svm_page_out(struct kvm *kvm, void kvmppc_uvmem_drop_pages(const struct kvm_memory_slot *free, struct kvm *kvm, bool skip_page_out, bool purge_gfn); +int kvmppc_uv_migrate_mem_slot(struct kvm *kvm, + const struct kvm_memory_slot *memslot); #else static inline int kvmppc_uvmem_init(void) { diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 6cf80e5..bf7324d 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4531,10 +4531,12 @@ static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, case KVM_MR_CREATE: if (kvmppc_uvmem_slot_init(kvm, new)) return; - uv_register_mem_slot(kvm->arch.lpid, - new->base_gfn << PAGE_SHIFT, - new->npages * PAGE_SIZE, - 0, new->id); + if (uv_register_mem_slot(kvm->arch.lpid, + new->base_gfn << PAGE_SHIFT, + new->npages * PAGE_SIZE, + 0, new->id)) + return; + kvmppc_uv_migrate_mem_slot(kvm, new); break; case KVM_MR_DELETE: uv_unregister_mem_slot(kvm->arch.lpid, old->id); diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 78f8580..4d8f5bc 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -451,7 +451,7 @@ static int kvmppc_svm_migrate_page(struct vm_area_struct *vma, return ret; } -static int kvmppc_uv_migrate_mem_slot(struct kvm *kvm, +int kvmppc_uv_migrate_mem_slot(struct kvm *kvm, const struct kvm_memory_slot *memslot) { unsigned long gfn = memslot->base_gfn; -- 1.8.3.1