From patchwork Thu Aug 22 10:26:14 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: 11109023 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 54A7A13B1 for ; Thu, 22 Aug 2019 10:26:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 0403E233FD for ; Thu, 22 Aug 2019 10:26:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0403E233FD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E75686B02F5; Thu, 22 Aug 2019 06:26:44 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id E24406B02F6; Thu, 22 Aug 2019 06:26:44 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CC5B96B02F7; Thu, 22 Aug 2019 06:26:44 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0064.hostedemail.com [216.40.44.64]) by kanga.kvack.org (Postfix) with ESMTP id 9F6176B02F5 for ; Thu, 22 Aug 2019 06:26:44 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 536DE8248AAA for ; Thu, 22 Aug 2019 10:26:44 +0000 (UTC) X-FDA: 75849685128.24.tooth23_57dce25bc7e02 X-Spam-Summary: 2,0,0,b631a1a341e30019,d41d8cd98f00b204,bharata@linux.ibm.com,:linuxppc-dev@lists.ozlabs.org:kvm-ppc@vger.kernel.org::paulus@au1.ibm.com:aneesh.kumar@linux.vnet.ibm.com:jglisse@redhat.com:linuxram@us.ibm.com:sukadev@linux.vnet.ibm.com:cclaudio@linux.ibm.com:hch@lst.de:bharata@linux.ibm.com,RULES_HIT:41:327:355:379:541:800:960:966:973:988:989:1260:1261:1311:1314:1345:1359:1431:1437:1515:1605:1730:1747:1777:1792:2196:2198:2199:2200:2393:2538:2559:2562:2693:2897:2901:3138:3139:3140:3141:3142:3865:3866:3867:3868:3870:3871:3874:4250:4321:4385:4398:4605:5007:6117:6119:6261:7875:7903:7904:8568:8603:8660:9036:10004:10954:11026:11473:11657:11658:11914:12043:12291:12296:12297:12438:12555:12895:12986:13148:13230:13869:13894:13972:14093:14394:21080:21324:21433:21451:21627:21796:30003:30005:30036:30054:30067:30070:30079,0,RBL:148.163.158.5:@linux.ibm.com:.lbl8.mailshell.net-62.2.0.100 64.100.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk ,SPF:fp, X-HE-Tag: tooth23_57dce25bc7e02 X-Filterd-Recvd-Size: 22869 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Thu, 22 Aug 2019 10:26:43 +0000 (UTC) Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x7MAMaOI104881 for ; Thu, 22 Aug 2019 06:26:42 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0a-001b2d01.pphosted.com with ESMTP id 2uhrhgsyg3-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 22 Aug 2019 06:26:42 -0400 Received: from localhost by e06smtp01.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) Thu, 22 Aug 2019 11:26:38 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7MAQaHL49217750 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2019 10:26:36 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A88A5AE059; Thu, 22 Aug 2019 10:26:36 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E8C81AE04D; Thu, 22 Aug 2019 10:26:33 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.57.57]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Aug 2019 10:26:33 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Bharata B Rao Subject: [PATCH v7 1/7] kvmppc: Driver to manage pages of secure guest Date: Thu, 22 Aug 2019 15:56:14 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190822102620.21897-1-bharata@linux.ibm.com> References: <20190822102620.21897-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19082210-4275-0000-0000-0000035BD3FA X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19082210-4276-0000-0000-0000386DF9B7 Message-Id: <20190822102620.21897-2-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-22_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 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-1908220112 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: KVMPPC driver to manage page transitions of secure guest via H_SVM_PAGE_IN and H_SVM_PAGE_OUT hcalls. H_SVM_PAGE_IN: Move the content of a normal page to secure page H_SVM_PAGE_OUT: Move the content of a secure page to normal page Private ZONE_DEVICE memory equal to the amount of secure memory available in the platform for running secure guests is created. Whenever a page belonging to the guest becomes secure, a page from this private device memory is used to represent and track that secure page on the HV side. The movement of pages between normal and secure memory is done via migrate_vma_pages() using UV_PAGE_IN and UV_PAGE_OUT ucalls. Signed-off-by: Bharata B Rao --- arch/powerpc/include/asm/hvcall.h | 4 + arch/powerpc/include/asm/kvm_book3s_devm.h | 29 ++ arch/powerpc/include/asm/kvm_host.h | 23 ++ arch/powerpc/include/asm/ultravisor-api.h | 2 + arch/powerpc/include/asm/ultravisor.h | 14 + arch/powerpc/kvm/Makefile | 3 + arch/powerpc/kvm/book3s_hv.c | 19 + arch/powerpc/kvm/book3s_hv_devm.c | 438 +++++++++++++++++++++ 8 files changed, 532 insertions(+) create mode 100644 arch/powerpc/include/asm/kvm_book3s_devm.h create mode 100644 arch/powerpc/kvm/book3s_hv_devm.c diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index 463c63a9fcf1..2f6b952deb0f 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -337,6 +337,10 @@ #define H_TLB_INVALIDATE 0xF808 #define H_COPY_TOFROM_GUEST 0xF80C +/* Platform-specific hcalls used by the Ultravisor */ +#define H_SVM_PAGE_IN 0xEF00 +#define H_SVM_PAGE_OUT 0xEF04 + /* Values for 2nd argument to H_SET_MODE */ #define H_SET_MODE_RESOURCE_SET_CIABR 1 #define H_SET_MODE_RESOURCE_SET_DAWR 2 diff --git a/arch/powerpc/include/asm/kvm_book3s_devm.h b/arch/powerpc/include/asm/kvm_book3s_devm.h new file mode 100644 index 000000000000..9603c2b48d67 --- /dev/null +++ b/arch/powerpc/include/asm/kvm_book3s_devm.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __POWERPC_KVM_PPC_HMM_H__ +#define __POWERPC_KVM_PPC_HMM_H__ + +#ifdef CONFIG_PPC_UV +unsigned long kvmppc_h_svm_page_in(struct kvm *kvm, + unsigned long gra, + unsigned long flags, + unsigned long page_shift); +unsigned long kvmppc_h_svm_page_out(struct kvm *kvm, + unsigned long gra, + unsigned long flags, + unsigned long page_shift); +#else +static inline unsigned long +kvmppc_h_svm_page_in(struct kvm *kvm, unsigned long gra, + unsigned long flags, unsigned long page_shift) +{ + return H_UNSUPPORTED; +} + +static inline unsigned long +kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long gra, + unsigned long flags, unsigned long page_shift) +{ + 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 4bb552d639b8..855d82730f44 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -242,6 +242,17 @@ struct revmap_entry { #define KVMPPC_RMAP_PRESENT 0x100000000ul #define KVMPPC_RMAP_INDEX 0xfffffffful +/* + * Bits 60:56 in the rmap entry will be used to identify the + * different uses/functions of rmap. + */ +#define KVMPPC_RMAP_DEVM_PFN (0x2ULL << 56) + +static inline bool kvmppc_rmap_is_devm_pfn(unsigned long pfn) +{ + return !!(pfn & KVMPPC_RMAP_DEVM_PFN); +} + struct kvm_arch_memory_slot { #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE unsigned long *rmap; @@ -849,4 +860,16 @@ static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {} static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {} static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {} +#ifdef CONFIG_PPC_UV +extern int kvmppc_devm_init(void); +extern void kvmppc_devm_free(void); +#else +static inline int kvmppc_devm_init(void) +{ + return 0; +} + +static inline void kvmppc_devm_free(void) {} +#endif /* CONFIG_PPC_UV */ + #endif /* __POWERPC_KVM_HOST_H__ */ diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h index 6a0f9c74f959..1cd1f595fd81 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -25,5 +25,7 @@ /* opcodes */ #define UV_WRITE_PATE 0xF104 #define UV_RETURN 0xF11C +#define UV_PAGE_IN 0xF128 +#define UV_PAGE_OUT 0xF12C #endif /* _ASM_POWERPC_ULTRAVISOR_API_H */ diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h index d7aa97aa7834..0fc4a974b2e8 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -31,4 +31,18 @@ static inline int uv_register_pate(u64 lpid, u64 dw0, u64 dw1) return ucall_norets(UV_WRITE_PATE, lpid, dw0, dw1); } +static inline int uv_page_in(u64 lpid, u64 src_ra, u64 dst_gpa, u64 flags, + u64 page_shift) +{ + return ucall_norets(UV_PAGE_IN, lpid, src_ra, dst_gpa, flags, + page_shift); +} + +static inline int uv_page_out(u64 lpid, u64 dst_ra, u64 src_gpa, u64 flags, + u64 page_shift) +{ + return ucall_norets(UV_PAGE_OUT, lpid, dst_ra, src_gpa, flags, + page_shift); +} + #endif /* _ASM_POWERPC_ULTRAVISOR_H */ diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile index 4c67cc79de7c..16b40590e67c 100644 --- a/arch/powerpc/kvm/Makefile +++ b/arch/powerpc/kvm/Makefile @@ -71,6 +71,9 @@ kvm-hv-y += \ book3s_64_mmu_radix.o \ book3s_hv_nested.o +kvm-hv-$(CONFIG_PPC_UV) += \ + book3s_hv_devm.o + kvm-hv-$(CONFIG_PPC_TRANSACTIONAL_MEM) += \ book3s_hv_tm.o diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index ec1804f822af..00b43ee8b693 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -72,6 +72,8 @@ #include #include #include +#include +#include #include "book3s.h" @@ -1075,6 +1077,18 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) kvmppc_get_gpr(vcpu, 5), kvmppc_get_gpr(vcpu, 6)); break; + case H_SVM_PAGE_IN: + ret = kvmppc_h_svm_page_in(vcpu->kvm, + kvmppc_get_gpr(vcpu, 4), + kvmppc_get_gpr(vcpu, 5), + kvmppc_get_gpr(vcpu, 6)); + break; + case H_SVM_PAGE_OUT: + ret = kvmppc_h_svm_page_out(vcpu->kvm, + kvmppc_get_gpr(vcpu, 4), + kvmppc_get_gpr(vcpu, 5), + kvmppc_get_gpr(vcpu, 6)); + break; default: return RESUME_HOST; } @@ -5510,11 +5524,16 @@ static int kvmppc_book3s_init_hv(void) no_mixing_hpt_and_radix = true; } + r = kvmppc_devm_init(); + if (r < 0) + pr_err("KVM-HV: kvmppc_devm_init failed %d\n", r); + return r; } static void kvmppc_book3s_exit_hv(void) { + kvmppc_devm_free(); kvmppc_free_host_rm_ops(); if (kvmppc_radix_possible()) kvmppc_radix_exit(); diff --git a/arch/powerpc/kvm/book3s_hv_devm.c b/arch/powerpc/kvm/book3s_hv_devm.c new file mode 100644 index 000000000000..13722f27fa7d --- /dev/null +++ b/arch/powerpc/kvm/book3s_hv_devm.c @@ -0,0 +1,438 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver to manage page migration between normal and secure + * memory. + * + * Copyright 2018 Bharata B Rao, IBM Corp. + */ + +/* + * A pseries guest can be run as a secure guest on Ultravisor-enabled + * POWER platforms. On such platforms, this driver will be used to manage + * the movement of guest pages between the normal memory managed by + * hypervisor (HV) and secure memory managed by Ultravisor (UV). + * + * The page-in or page-out requests from UV will come to HV as hcalls and + * HV will call back into UV via ultracalls to satisfy these page requests. + * + * Private ZONE_DEVICE memory equal to the amount of secure memory + * available in the platform for running secure guests is hotplugged. + * Whenever a page belonging to the guest becomes secure, a page from this + * private device memory is used to represent and track that secure page + * on the HV side. + * + * For each page that gets moved into secure memory, a device PFN is used + * on the HV side and migration PTE corresponding to that PFN would be + * populated in the QEMU page tables. Device PFNs are stored in the rmap + * array. Whenever a guest page becomes secure, device PFN allocated for + * the same will be populated in the corresponding slot in the rmap + * array. The overloading of rmap array's usage which otherwise is + * used primarily by HPT guests means that this feature (secure + * guest on PEF platforms) is available only for Radix MMU guests. + * Also since the same rmap array is used differently by nested + * guests, a secure guest can't have further nested guests. + */ + +#include +#include +#include +#include + +static struct dev_pagemap kvmppc_devm_pgmap; +static unsigned long *kvmppc_devm_pfn_bitmap; +static DEFINE_SPINLOCK(kvmppc_devm_pfn_lock); + +struct kvmppc_devm_page_pvt { + unsigned long *rmap; + unsigned int lpid; + unsigned long gpa; +}; + +/* + * Get a free device PFN from the pool + * + * Called when a normal page is moved to secure memory (UV_PAGE_IN). Device + * PFN will be used to keep track of the secure page on HV side. + * + * @rmap here is the slot in the rmap array that corresponds to @gpa. + * Thus a non-zero rmap entry indicates that the corresponding guest + * page has become secure, and is not mapped on the HV side. + * + * NOTE: In this and subsequent functions, we pass around and access + * individual elements of kvm_memory_slot->arch.rmap[] without any + * protection. Should we use lock_rmap() here? + */ +static struct page *kvmppc_devm_get_page(unsigned long *rmap, unsigned long gpa, + unsigned int lpid) +{ + struct page *dpage = NULL; + unsigned long bit, devm_pfn; + unsigned long flags; + struct kvmppc_devm_page_pvt *pvt; + unsigned long pfn_last, pfn_first; + + if (kvmppc_rmap_is_devm_pfn(*rmap)) + return NULL; + + pfn_first = kvmppc_devm_pgmap.res.start >> PAGE_SHIFT; + pfn_last = pfn_first + + (resource_size(&kvmppc_devm_pgmap.res) >> PAGE_SHIFT); + spin_lock_irqsave(&kvmppc_devm_pfn_lock, flags); + bit = find_first_zero_bit(kvmppc_devm_pfn_bitmap, pfn_last - pfn_first); + if (bit >= (pfn_last - pfn_first)) + goto out; + + bitmap_set(kvmppc_devm_pfn_bitmap, bit, 1); + devm_pfn = bit + pfn_first; + dpage = pfn_to_page(devm_pfn); + + if (!trylock_page(dpage)) + goto out_clear; + + *rmap = devm_pfn | KVMPPC_RMAP_DEVM_PFN; + pvt = kzalloc(sizeof(*pvt), GFP_ATOMIC); + if (!pvt) + goto out_unlock; + pvt->rmap = rmap; + pvt->gpa = gpa; + pvt->lpid = lpid; + dpage->zone_device_data = pvt; + spin_unlock_irqrestore(&kvmppc_devm_pfn_lock, flags); + + get_page(dpage); + return dpage; + +out_unlock: + unlock_page(dpage); +out_clear: + bitmap_clear(kvmppc_devm_pfn_bitmap, devm_pfn - pfn_first, 1); +out: + spin_unlock_irqrestore(&kvmppc_devm_pfn_lock, flags); + return NULL; +} + +/* + * Alloc a PFN from private device memory pool and copy page from normal + * memory to secure memory. + */ +static int +kvmppc_devm_migrate_alloc_and_copy(struct migrate_vma *mig, + unsigned long *rmap, unsigned long gpa, + unsigned int lpid, unsigned long page_shift) +{ + struct page *spage = migrate_pfn_to_page(*mig->src); + unsigned long pfn = *mig->src >> MIGRATE_PFN_SHIFT; + struct page *dpage; + + *mig->dst = 0; + if (!spage || !(*mig->src & MIGRATE_PFN_MIGRATE)) + return 0; + + dpage = kvmppc_devm_get_page(rmap, gpa, lpid); + if (!dpage) + return -EINVAL; + + if (spage) + uv_page_in(lpid, pfn << page_shift, gpa, 0, page_shift); + + *mig->dst = migrate_pfn(page_to_pfn(dpage)) | MIGRATE_PFN_LOCKED; + return 0; +} + +/* + * Move page from normal memory to secure memory. + */ +unsigned long +kvmppc_h_svm_page_in(struct kvm *kvm, unsigned long gpa, + unsigned long flags, unsigned long page_shift) +{ + unsigned long addr, end; + unsigned long src_pfn, dst_pfn; + struct migrate_vma mig; + struct vm_area_struct *vma; + int srcu_idx; + unsigned long gfn = gpa >> page_shift; + struct kvm_memory_slot *slot; + unsigned long *rmap; + int ret; + + if (page_shift != PAGE_SHIFT) + return H_P3; + + if (flags) + return H_P2; + + ret = H_PARAMETER; + down_read(&kvm->mm->mmap_sem); + srcu_idx = srcu_read_lock(&kvm->srcu); + slot = gfn_to_memslot(kvm, gfn); + rmap = &slot->arch.rmap[gfn - slot->base_gfn]; + addr = gfn_to_hva(kvm, gpa >> page_shift); + if (kvm_is_error_hva(addr)) + goto out; + + end = addr + (1UL << page_shift); + vma = find_vma_intersection(kvm->mm, addr, end); + if (!vma || vma->vm_start > addr || vma->vm_end < end) + goto out; + + memset(&mig, 0, sizeof(mig)); + mig.vma = vma; + mig.start = addr; + mig.end = end; + mig.src = &src_pfn; + mig.dst = &dst_pfn; + + if (migrate_vma_setup(&mig)) + goto out; + + if (kvmppc_devm_migrate_alloc_and_copy(&mig, rmap, gpa, + kvm->arch.lpid, page_shift)) + goto out_finalize; + + migrate_vma_pages(&mig); + ret = H_SUCCESS; +out_finalize: + migrate_vma_finalize(&mig); +out: + srcu_read_unlock(&kvm->srcu, srcu_idx); + up_read(&kvm->mm->mmap_sem); + return ret; +} + +/* + * Provision a new page on HV side and copy over the contents + * from secure memory. + */ +static int +kvmppc_devm_fault_migrate_alloc_and_copy(struct migrate_vma *mig, + unsigned long page_shift) +{ + struct page *dpage, *spage; + struct kvmppc_devm_page_pvt *pvt; + unsigned long pfn; + int ret; + + spage = migrate_pfn_to_page(*mig->src); + if (!spage || !(*mig->src & MIGRATE_PFN_MIGRATE)) + return 0; + if (!is_zone_device_page(spage)) + return 0; + + dpage = alloc_page_vma(GFP_HIGHUSER, mig->vma, mig->start); + if (!dpage) + return -EINVAL; + lock_page(dpage); + pvt = spage->zone_device_data; + + pfn = page_to_pfn(dpage); + ret = uv_page_out(pvt->lpid, pfn << page_shift, pvt->gpa, 0, + page_shift); + if (ret == U_SUCCESS) + *mig->dst = migrate_pfn(pfn) | MIGRATE_PFN_LOCKED; + else { + unlock_page(dpage); + __free_page(dpage); + } + return ret; +} + +/* + * Fault handler callback when HV touches any page that has been + * moved to secure memory, we ask UV to give back the page by + * issuing a UV_PAGE_OUT uvcall. + * + * This eventually results in dropping of device PFN and the newly + * provisioned page/PFN gets populated in QEMU page tables. + */ +static vm_fault_t kvmppc_devm_migrate_to_ram(struct vm_fault *vmf) +{ + unsigned long src_pfn, dst_pfn = 0; + struct migrate_vma mig; + int ret = 0; + + memset(&mig, 0, sizeof(mig)); + mig.vma = vmf->vma; + mig.start = vmf->address; + mig.end = vmf->address + PAGE_SIZE; + mig.src = &src_pfn; + mig.dst = &dst_pfn; + + if (migrate_vma_setup(&mig)) { + ret = VM_FAULT_SIGBUS; + goto out; + } + + if (kvmppc_devm_fault_migrate_alloc_and_copy(&mig, PAGE_SHIFT)) { + ret = VM_FAULT_SIGBUS; + goto out_finalize; + } + + migrate_vma_pages(&mig); +out_finalize: + migrate_vma_finalize(&mig); +out: + return ret; +} + +/* + * Release the device PFN back to the pool + * + * Gets called when secure page becomes a normal page during UV_PAGE_OUT. + */ +static void kvmppc_devm_page_free(struct page *page) +{ + unsigned long pfn = page_to_pfn(page); + unsigned long flags; + struct kvmppc_devm_page_pvt *pvt; + + spin_lock_irqsave(&kvmppc_devm_pfn_lock, flags); + pvt = page->zone_device_data; + page->zone_device_data = NULL; + + bitmap_clear(kvmppc_devm_pfn_bitmap, + pfn - (kvmppc_devm_pgmap.res.start >> PAGE_SHIFT), 1); + *pvt->rmap = 0; + spin_unlock_irqrestore(&kvmppc_devm_pfn_lock, flags); + kfree(pvt); +} + +static const struct dev_pagemap_ops kvmppc_devm_ops = { + .page_free = kvmppc_devm_page_free, + .migrate_to_ram = kvmppc_devm_migrate_to_ram, +}; + +/* + * Move page from secure memory to normal memory. + */ +unsigned long +kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long gpa, + unsigned long flags, unsigned long page_shift) +{ + struct migrate_vma mig; + unsigned long addr, end; + struct vm_area_struct *vma; + unsigned long src_pfn, dst_pfn = 0; + int srcu_idx; + int ret; + + if (page_shift != PAGE_SHIFT) + return H_P3; + + if (flags) + return H_P2; + + ret = H_PARAMETER; + down_read(&kvm->mm->mmap_sem); + srcu_idx = srcu_read_lock(&kvm->srcu); + addr = gfn_to_hva(kvm, gpa >> page_shift); + if (kvm_is_error_hva(addr)) + goto out; + + end = addr + (1UL << page_shift); + vma = find_vma_intersection(kvm->mm, addr, end); + if (!vma || vma->vm_start > addr || vma->vm_end < end) + goto out; + + memset(&mig, 0, sizeof(mig)); + mig.vma = vma; + mig.start = addr; + mig.end = end; + mig.src = &src_pfn; + mig.dst = &dst_pfn; + if (migrate_vma_setup(&mig)) + goto out; + + ret = kvmppc_devm_fault_migrate_alloc_and_copy(&mig, page_shift); + if (ret) + goto out_finalize; + + migrate_vma_pages(&mig); + ret = H_SUCCESS; +out_finalize: + migrate_vma_finalize(&mig); +out: + srcu_read_unlock(&kvm->srcu, srcu_idx); + up_read(&kvm->mm->mmap_sem); + return ret; +} + +static u64 kvmppc_get_secmem_size(void) +{ + struct device_node *np; + int i, len; + const __be32 *prop; + u64 size = 0; + + np = of_find_compatible_node(NULL, NULL, "ibm,uv-firmware"); + if (!np) + goto out; + + prop = of_get_property(np, "secure-memory-ranges", &len); + if (!prop) + goto out_put; + + for (i = 0; i < len / (sizeof(*prop) * 4); i++) + size += of_read_number(prop + (i * 4) + 2, 2); + +out_put: + of_node_put(np); +out: + return size; +} + +int kvmppc_devm_init(void) +{ + int ret = 0; + unsigned long size; + struct resource *res; + void *addr; + unsigned long pfn_last, pfn_first; + + size = kvmppc_get_secmem_size(); + if (!size) { + ret = -ENODEV; + goto out; + } + + res = request_free_mem_region(&iomem_resource, size, "kvmppc_devm"); + if (IS_ERR(res)) { + ret = PTR_ERR(res); + goto out; + } + + kvmppc_devm_pgmap.type = MEMORY_DEVICE_PRIVATE; + kvmppc_devm_pgmap.res = *res; + kvmppc_devm_pgmap.ops = &kvmppc_devm_ops; + addr = memremap_pages(&kvmppc_devm_pgmap, -1); + if (IS_ERR(addr)) { + ret = PTR_ERR(addr); + goto out_free_region; + } + + pfn_first = res->start >> PAGE_SHIFT; + pfn_last = pfn_first + (resource_size(res) >> PAGE_SHIFT); + kvmppc_devm_pfn_bitmap = kcalloc(BITS_TO_LONGS(pfn_last - pfn_first), + sizeof(unsigned long), GFP_KERNEL); + if (!kvmppc_devm_pfn_bitmap) { + ret = -ENOMEM; + goto out_unmap; + } + + pr_info("KVMPPC-DEVM: Secure Memory size 0x%lx\n", size); + return ret; +out_unmap: + memunmap_pages(&kvmppc_devm_pgmap); +out_free_region: + release_mem_region(res->start, size); +out: + return ret; +} + +void kvmppc_devm_free(void) +{ + memunmap_pages(&kvmppc_devm_pgmap); + release_mem_region(kvmppc_devm_pgmap.res.start, + resource_size(&kvmppc_devm_pgmap.res)); + kfree(kvmppc_devm_pfn_bitmap); +} From patchwork Thu Aug 22 10:26:15 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: 11109025 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3E92114F7 for ; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 22 Aug 2019 11:26:41 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7MAQdxI44564908 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2019 10:26:39 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6D952AE058; Thu, 22 Aug 2019 10:26:39 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1F4B6AE053; Thu, 22 Aug 2019 10:26:37 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.57.57]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Aug 2019 10:26:36 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Bharata B Rao Subject: [PATCH v7 2/7] kvmppc: Shared pages support for secure guests Date: Thu, 22 Aug 2019 15:56:15 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190822102620.21897-1-bharata@linux.ibm.com> References: <20190822102620.21897-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19082210-0016-0000-0000-000002A16DD8 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19082210-0017-0000-0000-00003301A65C Message-Id: <20190822102620.21897-3-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-22_07:,, 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=752 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908220112 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: A secure guest will share some of its pages with hypervisor (Eg. virtio bounce buffers etc). Support sharing of pages between hypervisor and ultravisor. Once a secure page is converted to shared page, the device page is unmapped from the HV side page tables. Signed-off-by: Bharata B Rao --- arch/powerpc/include/asm/hvcall.h | 3 ++ arch/powerpc/kvm/book3s_hv_devm.c | 70 +++++++++++++++++++++++++++++-- 2 files changed, 69 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index 2f6b952deb0f..05b8536f6653 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -337,6 +337,9 @@ #define H_TLB_INVALIDATE 0xF808 #define H_COPY_TOFROM_GUEST 0xF80C +/* Flags for H_SVM_PAGE_IN */ +#define H_PAGE_IN_SHARED 0x1 + /* Platform-specific hcalls used by the Ultravisor */ #define H_SVM_PAGE_IN 0xEF00 #define H_SVM_PAGE_OUT 0xEF04 diff --git a/arch/powerpc/kvm/book3s_hv_devm.c b/arch/powerpc/kvm/book3s_hv_devm.c index 13722f27fa7d..6a3229b78fed 100644 --- a/arch/powerpc/kvm/book3s_hv_devm.c +++ b/arch/powerpc/kvm/book3s_hv_devm.c @@ -46,6 +46,7 @@ struct kvmppc_devm_page_pvt { unsigned long *rmap; unsigned int lpid; unsigned long gpa; + bool skip_page_out; }; /* @@ -139,6 +140,54 @@ kvmppc_devm_migrate_alloc_and_copy(struct migrate_vma *mig, return 0; } +/* + * Shares the page with HV, thus making it a normal page. + * + * - If the page is already secure, then provision a new page and share + * - If the page is a normal page, share the existing page + * + * In the former case, uses the dev_pagemap_ops migrate_to_ram handler + * to unmap the device page from QEMU's page tables. + */ +static unsigned long +kvmppc_share_page(struct kvm *kvm, unsigned long gpa, unsigned long page_shift) +{ + + int ret = H_PARAMETER; + struct page *devm_page; + struct kvmppc_devm_page_pvt *pvt; + unsigned long pfn; + unsigned long *rmap; + struct kvm_memory_slot *slot; + unsigned long gfn = gpa >> page_shift; + int srcu_idx; + + srcu_idx = srcu_read_lock(&kvm->srcu); + slot = gfn_to_memslot(kvm, gfn); + if (!slot) + goto out; + + rmap = &slot->arch.rmap[gfn - slot->base_gfn]; + if (kvmppc_rmap_is_devm_pfn(*rmap)) { + devm_page = pfn_to_page(*rmap & ~KVMPPC_RMAP_DEVM_PFN); + pvt = (struct kvmppc_devm_page_pvt *) + devm_page->zone_device_data; + pvt->skip_page_out = true; + } + + pfn = gfn_to_pfn(kvm, gpa >> page_shift); + if (is_error_noslot_pfn(pfn)) + goto out; + + ret = uv_page_in(kvm->arch.lpid, pfn << page_shift, gpa, 0, page_shift); + if (ret == U_SUCCESS) + ret = H_SUCCESS; + kvm_release_pfn_clean(pfn); +out: + srcu_read_unlock(&kvm->srcu, srcu_idx); + return ret; +} + /* * Move page from normal memory to secure memory. */ @@ -159,9 +208,12 @@ kvmppc_h_svm_page_in(struct kvm *kvm, unsigned long gpa, if (page_shift != PAGE_SHIFT) return H_P3; - if (flags) + if (flags & ~H_PAGE_IN_SHARED) return H_P2; + if (flags & H_PAGE_IN_SHARED) + return kvmppc_share_page(kvm, gpa, page_shift); + ret = H_PARAMETER; down_read(&kvm->mm->mmap_sem); srcu_idx = srcu_read_lock(&kvm->srcu); @@ -211,7 +263,7 @@ kvmppc_devm_fault_migrate_alloc_and_copy(struct migrate_vma *mig, struct page *dpage, *spage; struct kvmppc_devm_page_pvt *pvt; unsigned long pfn; - int ret; + int ret = U_SUCCESS; spage = migrate_pfn_to_page(*mig->src); if (!spage || !(*mig->src & MIGRATE_PFN_MIGRATE)) @@ -226,8 +278,18 @@ kvmppc_devm_fault_migrate_alloc_and_copy(struct migrate_vma *mig, pvt = spage->zone_device_data; pfn = page_to_pfn(dpage); - ret = uv_page_out(pvt->lpid, pfn << page_shift, pvt->gpa, 0, - page_shift); + + /* + * This same function is used in two cases: + * - When HV touches a secure page, for which we do page-out + * - When a secure page is converted to shared page, we touch + * the page to essentially unmap the device page. In this + * case we skip page-out. + */ + if (!pvt->skip_page_out) + ret = uv_page_out(pvt->lpid, pfn << page_shift, pvt->gpa, 0, + page_shift); + if (ret == U_SUCCESS) *mig->dst = migrate_pfn(pfn) | MIGRATE_PFN_LOCKED; else { From patchwork Thu Aug 22 10:26:16 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: 11109027 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6497F14F7 for ; Thu, 22 Aug 2019 10:26:52 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2BB6E233FD for ; Thu, 22 Aug 2019 10:26:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2BB6E233FD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C31C66B02F8; Thu, 22 Aug 2019 06:26:50 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id B6F876B02F9; Thu, 22 Aug 2019 06:26:50 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A568E6B02FA; Thu, 22 Aug 2019 06:26:50 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0227.hostedemail.com [216.40.44.227]) by kanga.kvack.org (Postfix) with ESMTP id 816906B02F8 for ; Thu, 22 Aug 2019 06:26:50 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 439F0181AC9B4 for ; Thu, 22 Aug 2019 10:26:50 +0000 (UTC) X-FDA: 75849685380.07.crib12_58bd1250fdc2e X-Spam-Summary: 2,0,0,5540acc8ac6baa59,d41d8cd98f00b204,bharata@linux.ibm.com,:linuxppc-dev@lists.ozlabs.org:kvm-ppc@vger.kernel.org::paulus@au1.ibm.com:aneesh.kumar@linux.vnet.ibm.com:jglisse@redhat.com:linuxram@us.ibm.com:sukadev@linux.vnet.ibm.com:cclaudio@linux.ibm.com:hch@lst.de:bharata@linux.ibm.com:paulus@ozlabs.org,RULES_HIT:2:41:355:379:541:800:960:966:973:988:989:1260:1261:1311:1314:1345:1359:1437:1515:1535:1605:1730:1747:1777:1792:2196:2199:2393:2559:2562:2693:3138:3139:3140:3141:3142:3865:3866:3867:3868:3870:3871:3874:4049:4120:4250:4321:4385:4398:4605:5007:6119:6261:6742:7558:7903:7904:8568:8603:8660:8784:10004:11026:11233:11473:11657:11658:11914:12043:12291:12296:12297:12438:12555:12895:12986:13148:13161:13229:13230:13894:13972:14096:14394:21080:21212:21451:21524:21627:30012:30045:30054:30080,0,RBL:error,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: crib12_58bd1250fdc2e X-Filterd-Recvd-Size: 9398 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf21.hostedemail.com (Postfix) with ESMTP for ; Thu, 22 Aug 2019 10:26:49 +0000 (UTC) Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x7MAPE1d083842 for ; Thu, 22 Aug 2019 06:26:48 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2uhs9gg279-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 22 Aug 2019 06:26:48 -0400 Received: from localhost by e06smtp04.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) Thu, 22 Aug 2019 11:26:44 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7MAQg6O43647024 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2019 10:26:42 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B0B53AE055; Thu, 22 Aug 2019 10:26:42 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA245AE05A; Thu, 22 Aug 2019 10:26:39 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.57.57]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Aug 2019 10:26:39 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Bharata B Rao , Paul Mackerras Subject: [PATCH v7 3/7] kvmppc: H_SVM_INIT_START and H_SVM_INIT_DONE hcalls Date: Thu, 22 Aug 2019 15:56:16 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190822102620.21897-1-bharata@linux.ibm.com> References: <20190822102620.21897-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19082210-0016-0000-0000-000002A16DDA X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19082210-0017-0000-0000-00003301A65D Message-Id: <20190822102620.21897-4-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-22_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 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-1908220112 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 9603c2b48d67..fc924ef00b91 100644 --- a/arch/powerpc/include/asm/kvm_book3s_devm.h +++ b/arch/powerpc/include/asm/kvm_book3s_devm.h @@ -11,6 +11,8 @@ unsigned long kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long gra, unsigned long flags, unsigned long page_shift); +unsigned long kvmppc_h_svm_init_start(struct kvm *kvm); +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 855d82730f44..66e5cc8c9759 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -272,6 +272,10 @@ 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 0fc4a974b2e8..58ccf5e2d6bb 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -45,4 +45,11 @@ 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 6a3229b78fed..494495806407 100644 --- a/arch/powerpc/kvm/book3s_hv_devm.c +++ b/arch/powerpc/kvm/book3s_hv_devm.c @@ -49,6 +49,40 @@ struct kvmppc_devm_page_pvt { bool skip_page_out; }; +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; +} + /* * Get a free device PFN from the pool * From patchwork Thu Aug 22 10:26:17 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: 11109029 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 74D2513B1 for ; Thu, 22 Aug 2019 10:26:58 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4B9C7233A2 for ; Thu, 22 Aug 2019 10:26:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B9C7233A2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 22 Aug 2019 11:26:47 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7MAQkSp46072182 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2019 10:26:46 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 09F5DAE055; Thu, 22 Aug 2019 10:26:46 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 28FB0AE056; Thu, 22 Aug 2019 10:26:43 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.57.57]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Aug 2019 10:26:42 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Bharata B Rao , Paul Mackerras Subject: [PATCH v7 4/7] kvmppc: Handle memory plug/unplug to secure VM Date: Thu, 22 Aug 2019 15:56:17 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190822102620.21897-1-bharata@linux.ibm.com> References: <20190822102620.21897-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19082210-0012-0000-0000-000003416D3F X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19082210-0013-0000-0000-0000217B97F3 Message-Id: <20190822102620.21897-5-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-22_07:,, 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=773 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908220112 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Register the new memslot with UV during plug and unregister the memslot during unplug. Signed-off-by: Bharata B Rao Acked-by: Paul Mackerras --- arch/powerpc/include/asm/ultravisor-api.h | 1 + arch/powerpc/include/asm/ultravisor.h | 5 +++++ arch/powerpc/kvm/book3s_hv.c | 17 +++++++++++++++++ 3 files changed, 23 insertions(+) diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h index c578d9b13a56..46b1ee381695 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -26,6 +26,7 @@ #define UV_WRITE_PATE 0xF104 #define UV_RETURN 0xF11C #define UV_REGISTER_MEM_SLOT 0xF120 +#define UV_UNREGISTER_MEM_SLOT 0xF124 #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 58ccf5e2d6bb..719c0c3930b9 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -52,4 +52,9 @@ static inline int uv_register_mem_slot(u64 lpid, u64 start_gpa, u64 size, size, flags, slotid); } +static inline int uv_unregister_mem_slot(u64 lpid, u64 slotid) +{ + return ucall_norets(UV_UNREGISTER_MEM_SLOT, lpid, slotid); +} + #endif /* _ASM_POWERPC_ULTRAVISOR_H */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 33b8ebffbef0..57f8b0b1c703 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -74,6 +74,7 @@ #include #include #include +#include #include "book3s.h" @@ -4504,6 +4505,22 @@ static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, if (change == KVM_MR_FLAGS_ONLY && kvm_is_radix(kvm) && ((new->flags ^ old->flags) & KVM_MEM_LOG_DIRTY_PAGES)) kvmppc_radix_flush_memslot(kvm, old); + /* + * If UV hasn't yet called H_SVM_INIT_START, don't register memslots. + */ + if (!kvm->arch.secure_guest) + return; + + /* + * TODO: Handle KVM_MR_MOVE + */ + if (change == KVM_MR_CREATE) { + uv_register_mem_slot(kvm->arch.lpid, + new->base_gfn << PAGE_SHIFT, + new->npages * PAGE_SIZE, + 0, new->id); + } else if (change == KVM_MR_DELETE) + uv_unregister_mem_slot(kvm->arch.lpid, old->id); } /* From patchwork Thu Aug 22 10:26:18 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: 11109031 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9A6BC13B1 for ; Thu, 22 Aug 2019 10:27:00 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 63F11233FE for ; Thu, 22 Aug 2019 10:27:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 63F11233FE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 995916B02FC; Thu, 22 Aug 2019 06:26:57 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 96BF76B02FD; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 22 Aug 2019 11:26:50 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7MAQnHJ45285380 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2019 10:26:49 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DE24FAE051; Thu, 22 Aug 2019 10:26:48 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5E09DAE058; Thu, 22 Aug 2019 10:26:46 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.57.57]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Aug 2019 10:26:46 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Bharata B Rao Subject: [PATCH v7 5/7] kvmppc: Radix changes for secure guest Date: Thu, 22 Aug 2019 15:56:18 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190822102620.21897-1-bharata@linux.ibm.com> References: <20190822102620.21897-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19082210-0016-0000-0000-000002A16DE1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19082210-0017-0000-0000-00003301A665 Message-Id: <20190822102620.21897-6-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-22_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 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-1908220112 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: - After the guest becomes secure, when we handle a page fault of a page belonging to SVM in HV, send that page to UV via UV_PAGE_IN. - Whenever a page is unmapped on the HV side, inform UV via UV_PAGE_INVAL. - Ensure all those routines that walk the secondary page tables of the guest don't do so in case of secure VM. For secure guest, the active secondary page tables are in secure memory and the secondary page tables in HV are freed when guest becomes secure. Signed-off-by: Bharata B Rao --- arch/powerpc/include/asm/kvm_host.h | 12 ++++++++++++ arch/powerpc/include/asm/ultravisor-api.h | 1 + arch/powerpc/include/asm/ultravisor.h | 5 +++++ arch/powerpc/kvm/book3s_64_mmu_radix.c | 22 ++++++++++++++++++++++ arch/powerpc/kvm/book3s_hv_devm.c | 20 ++++++++++++++++++++ 5 files changed, 60 insertions(+) diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 66e5cc8c9759..29333e8de1c4 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -867,6 +867,8 @@ static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {} #ifdef CONFIG_PPC_UV extern int kvmppc_devm_init(void); extern void kvmppc_devm_free(void); +extern bool kvmppc_is_guest_secure(struct kvm *kvm); +extern int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gpa); #else static inline int kvmppc_devm_init(void) { @@ -874,6 +876,16 @@ static inline int kvmppc_devm_init(void) } static inline void kvmppc_devm_free(void) {} + +static inline bool kvmppc_is_guest_secure(struct kvm *kvm) +{ + return false; +} + +static inline int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gpa) +{ + return -EFAULT; +} #endif /* CONFIG_PPC_UV */ #endif /* __POWERPC_KVM_HOST_H__ */ diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h index 46b1ee381695..cf200d4ce703 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -29,5 +29,6 @@ #define UV_UNREGISTER_MEM_SLOT 0xF124 #define UV_PAGE_IN 0xF128 #define UV_PAGE_OUT 0xF12C +#define UV_PAGE_INVAL 0xF138 #endif /* _ASM_POWERPC_ULTRAVISOR_API_H */ diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h index 719c0c3930b9..b333241bbe4c 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -57,4 +57,9 @@ static inline int uv_unregister_mem_slot(u64 lpid, u64 slotid) return ucall_norets(UV_UNREGISTER_MEM_SLOT, lpid, slotid); } +static inline int uv_page_inval(u64 lpid, u64 gpa, u64 page_shift) +{ + return ucall_norets(UV_PAGE_INVAL, lpid, gpa, page_shift); +} + #endif /* _ASM_POWERPC_ULTRAVISOR_H */ diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index 2d415c36a61d..93ad34e63045 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -19,6 +19,8 @@ #include #include #include +#include +#include /* * Supported radix tree geometry. @@ -915,6 +917,9 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, if (!(dsisr & DSISR_PRTABLE_FAULT)) gpa |= ea & 0xfff; + if (kvmppc_is_guest_secure(kvm)) + return kvmppc_send_page_to_uv(kvm, gpa & PAGE_MASK); + /* Get the corresponding memslot */ memslot = gfn_to_memslot(kvm, gfn); @@ -972,6 +977,11 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, unsigned long gpa = gfn << PAGE_SHIFT; unsigned int shift; + if (kvmppc_is_guest_secure(kvm)) { + uv_page_inval(kvm->arch.lpid, gpa, PAGE_SIZE); + return 0; + } + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep)) kvmppc_unmap_pte(kvm, ptep, gpa, shift, memslot, @@ -989,6 +999,9 @@ int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, int ref = 0; unsigned long old, *rmapp; + if (kvmppc_is_guest_secure(kvm)) + return ref; + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep) && pte_young(*ptep)) { old = kvmppc_radix_update_pte(kvm, ptep, _PAGE_ACCESSED, 0, @@ -1013,6 +1026,9 @@ int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, unsigned int shift; int ref = 0; + if (kvmppc_is_guest_secure(kvm)) + return ref; + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep) && pte_young(*ptep)) ref = 1; @@ -1030,6 +1046,9 @@ static int kvm_radix_test_clear_dirty(struct kvm *kvm, int ret = 0; unsigned long old, *rmapp; + if (kvmppc_is_guest_secure(kvm)) + return ret; + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep) && pte_dirty(*ptep)) { ret = 1; @@ -1082,6 +1101,9 @@ void kvmppc_radix_flush_memslot(struct kvm *kvm, unsigned long gpa; unsigned int shift; + if (kvmppc_is_guest_secure(kvm)) + return; + gpa = memslot->base_gfn << PAGE_SHIFT; spin_lock(&kvm->mmu_lock); for (n = memslot->npages; n; --n) { diff --git a/arch/powerpc/kvm/book3s_hv_devm.c b/arch/powerpc/kvm/book3s_hv_devm.c index 494495806407..19cfad340a51 100644 --- a/arch/powerpc/kvm/book3s_hv_devm.c +++ b/arch/powerpc/kvm/book3s_hv_devm.c @@ -49,6 +49,11 @@ struct kvmppc_devm_page_pvt { bool skip_page_out; }; +bool kvmppc_is_guest_secure(struct kvm *kvm) +{ + return !!(kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE); +} + unsigned long kvmppc_h_svm_init_start(struct kvm *kvm) { struct kvm_memslots *slots; @@ -453,6 +458,21 @@ kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long gpa, return ret; } +int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gpa) +{ + unsigned long pfn; + int ret; + + pfn = gfn_to_pfn(kvm, gpa >> PAGE_SHIFT); + if (is_error_noslot_pfn(pfn)) + return -EFAULT; + + ret = uv_page_in(kvm->arch.lpid, pfn << PAGE_SHIFT, gpa, 0, PAGE_SHIFT); + kvm_release_pfn_clean(pfn); + + return (ret == U_SUCCESS) ? RESUME_GUEST : -EFAULT; +} + static u64 kvmppc_get_secmem_size(void) { struct device_node *np; From patchwork Thu Aug 22 10:26:19 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: 11109033 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 27A9614F7 for ; Thu, 22 Aug 2019 10:27:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D7BCB23405 for ; Thu, 22 Aug 2019 10:27:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D7BCB23405 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id EC6AE6B02FE; Thu, 22 Aug 2019 06:27:00 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id E27B46B02FF; Thu, 22 Aug 2019 06:27:00 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D1B426B0300; Thu, 22 Aug 2019 06:27:00 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0199.hostedemail.com [216.40.44.199]) by kanga.kvack.org (Postfix) with ESMTP id 9C2C36B02FE for ; Thu, 22 Aug 2019 06:27:00 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 538CD181AC9B4 for ; Thu, 22 Aug 2019 10:27:00 +0000 (UTC) X-FDA: 75849685800.06.mist68_5a2ee1cb27808 X-Spam-Summary: 2,0,0,4364d7c309064e3c,d41d8cd98f00b204,bharata@linux.ibm.com,:linuxppc-dev@lists.ozlabs.org:kvm-ppc@vger.kernel.org::paulus@au1.ibm.com:aneesh.kumar@linux.vnet.ibm.com:jglisse@redhat.com:linuxram@us.ibm.com:sukadev@linux.vnet.ibm.com:cclaudio@linux.ibm.com:hch@lst.de:bharata@linux.ibm.com,RULES_HIT:4:41:69:355:379:541:800:960:966:973:988:989:1260:1261:1311:1314:1345:1359:1431:1437:1515:1605:1730:1747:1777:1792:2196:2199:2393:2559:2562:2638:2693:2898:3138:3139:3140:3141:3142:3865:3866:3867:3868:3870:3871:3874:4250:4321:4385:4398:4605:5007:6119:6261:7558:7875:7903:7904:8568:8603:8660:9036:10004:11026:11232:11473:11657:11658:11914:12043:12291:12296:12297:12438:12555:12663:12895:12986:13141:13148:13161:13229:13230:13894:14093:14096:14394:21080:21433:21451:21627:30054:30070,0,RBL:148.163.156.1:@linux.ibm.com:.lbl8.mailshell.net-62.2.0.100 64.100.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:none,Custom_rules :0:0:0,L X-HE-Tag: mist68_5a2ee1cb27808 X-Filterd-Recvd-Size: 15671 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Thu, 22 Aug 2019 10:26:59 +0000 (UTC) Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x7MAN1sT052163 for ; Thu, 22 Aug 2019 06:26:58 -0400 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0a-001b2d01.pphosted.com with ESMTP id 2uhqx6ubr9-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 22 Aug 2019 06:26:58 -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) Thu, 22 Aug 2019 11:26:53 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7MAQpFY60293126 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2019 10:26:51 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9E9C1AE058; Thu, 22 Aug 2019 10:26:51 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4C643AE053; Thu, 22 Aug 2019 10:26:49 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.57.57]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Aug 2019 10:26:49 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Bharata B Rao Subject: [PATCH v7 6/7] kvmppc: Support reset of secure guest Date: Thu, 22 Aug 2019 15:56:19 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190822102620.21897-1-bharata@linux.ibm.com> References: <20190822102620.21897-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19082210-0028-0000-0000-000003926BDC X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19082210-0029-0000-0000-000024549685 Message-Id: <20190822102620.21897-7-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-22_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 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-1908220112 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add support for reset of secure guest via a new ioctl KVM_PPC_SVM_OFF. This ioctl will be issued by QEMU during reset and includes the the following steps: - Ask UV to terminate the guest via UV_SVM_TERMINATE ucall - Unpin the VPA pages so that they can be migrated back to secure side when guest becomes secure again. This is required because pinned pages can't be migrated. - Reinitialize guest's partitioned scoped page tables. These are freed when guest becomes secure (H_SVM_INIT_DONE) - Release all device pages of the secure guest. After these steps, guest is ready to issue UV_ESM call once again to switch to secure mode. Signed-off-by: Bharata B Rao Signed-off-by: Sukadev Bhattiprolu [Implementation of uv_svm_terminate() and its call from guest shutdown path] Signed-off-by: Ram Pai [Unpinning of VPA pages] --- Documentation/virtual/kvm/api.txt | 19 ++++++ arch/powerpc/include/asm/kvm_book3s_devm.h | 6 ++ arch/powerpc/include/asm/kvm_ppc.h | 2 + arch/powerpc/include/asm/ultravisor-api.h | 1 + arch/powerpc/include/asm/ultravisor.h | 5 ++ arch/powerpc/kvm/book3s_hv.c | 70 ++++++++++++++++++++++ arch/powerpc/kvm/book3s_hv_devm.c | 60 +++++++++++++++++++ arch/powerpc/kvm/powerpc.c | 12 ++++ include/uapi/linux/kvm.h | 1 + 9 files changed, 176 insertions(+) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index e54a3f51ddc5..531562e01343 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -4111,6 +4111,25 @@ Valid values for 'action': #define KVM_PMU_EVENT_ALLOW 0 #define KVM_PMU_EVENT_DENY 1 +4.121 KVM_PPC_SVM_OFF + +Capability: basic +Architectures: powerpc +Type: vm ioctl +Parameters: none +Returns: 0 on successful completion, +Errors: + EINVAL: if ultravisor failed to terminate the secure guest + ENOMEM: if hypervisor failed to allocate new radix page tables for guest + +This ioctl is used to turn off the secure mode of the guest or transition +the guest from secure mode to normal mode. This is invoked when the guest +is reset. This has no effect if called for a normal guest. + +This ioctl issues an ultravisor call to terminate the secure guest, +unpins the VPA pages, reinitializes guest's partition scoped page +tables and releases all the device pages that are used to track the +secure pages by hypervisor. 5. The kvm_run structure ------------------------ diff --git a/arch/powerpc/include/asm/kvm_book3s_devm.h b/arch/powerpc/include/asm/kvm_book3s_devm.h index fc924ef00b91..62e1992cbac7 100644 --- a/arch/powerpc/include/asm/kvm_book3s_devm.h +++ b/arch/powerpc/include/asm/kvm_book3s_devm.h @@ -13,6 +13,7 @@ unsigned long kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long page_shift); unsigned long kvmppc_h_svm_init_start(struct kvm *kvm); unsigned long kvmppc_h_svm_init_done(struct kvm *kvm); +void kvmppc_devm_free_memslot_pfns(struct kvm *kvm, struct kvm_memslots *slots); #else static inline unsigned long kvmppc_h_svm_page_in(struct kvm *kvm, unsigned long gra, @@ -37,5 +38,10 @@ static inline unsigned long kvmppc_h_svm_init_done(struct kvm *kvm) { return H_UNSUPPORTED; } + +static inline void kvmppc_devm_free_memslot_pfns(struct kvm *kvm, + struct kvm_memslots *slots) +{ +} #endif /* CONFIG_PPC_UV */ #endif /* __POWERPC_KVM_PPC_HMM_H__ */ diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 2484e6a8f5ca..e4093d067354 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -177,6 +177,7 @@ extern void kvm_spapr_tce_release_iommu_group(struct kvm *kvm, extern int kvmppc_switch_mmu_to_hpt(struct kvm *kvm); extern int kvmppc_switch_mmu_to_radix(struct kvm *kvm); extern void kvmppc_setup_partition_table(struct kvm *kvm); +extern int kvmppc_reinit_partition_table(struct kvm *kvm); extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, struct kvm_create_spapr_tce_64 *args); @@ -321,6 +322,7 @@ struct kvmppc_ops { int size); int (*store_to_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr, int size); + int (*svm_off)(struct kvm *kvm); }; extern struct kvmppc_ops *kvmppc_hv_ops; diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h index cf200d4ce703..3a27a0c0be05 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -30,5 +30,6 @@ #define UV_PAGE_IN 0xF128 #define UV_PAGE_OUT 0xF12C #define UV_PAGE_INVAL 0xF138 +#define UV_SVM_TERMINATE 0xF13C #endif /* _ASM_POWERPC_ULTRAVISOR_API_H */ diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h index b333241bbe4c..754a37de646d 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -62,4 +62,9 @@ static inline int uv_page_inval(u64 lpid, u64 gpa, u64 page_shift) return ucall_norets(UV_PAGE_INVAL, lpid, gpa, page_shift); } +static inline int uv_svm_terminate(u64 lpid) +{ + return ucall_norets(UV_SVM_TERMINATE, lpid); +} + #endif /* _ASM_POWERPC_ULTRAVISOR_H */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 57f8b0b1c703..4d16121fda86 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -2433,6 +2433,15 @@ static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) vpa->dirty); } +static void unpin_vpa_reset(struct kvm *kvm, struct kvmppc_vpa *vpa) +{ + unpin_vpa(kvm, vpa); + vpa->gpa = 0; + vpa->pinned_addr = NULL; + vpa->dirty = false; + vpa->update_pending = 0; +} + static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) { spin_lock(&vcpu->arch.vpa_update_lock); @@ -4576,6 +4585,22 @@ void kvmppc_setup_partition_table(struct kvm *kvm) kvmhv_set_ptbl_entry(kvm->arch.lpid, dw0, dw1); } +/* + * Called from KVM_PPC_SVM_OFF ioctl at guest reset time when secure + * guest is converted back to normal guest. + */ +int kvmppc_reinit_partition_table(struct kvm *kvm) +{ + int ret; + + ret = kvmppc_init_vm_radix(kvm); + if (ret) + return ret; + + kvmppc_setup_partition_table(kvm); + return 0; +} + /* * Set up HPT (hashed page table) and RMA (real-mode area). * Must be called with kvm->arch.mmu_setup_lock held. @@ -4963,6 +4988,7 @@ static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) if (nesting_enabled(kvm)) kvmhv_release_all_nested(kvm); kvm->arch.process_table = 0; + uv_svm_terminate(kvm->arch.lpid); kvmhv_set_ptbl_entry(kvm->arch.lpid, 0, 0); } kvmppc_free_lpid(kvm->arch.lpid); @@ -5404,6 +5430,49 @@ static int kvmhv_store_to_eaddr(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr, return rc; } +/* + * IOCTL handler to turn off secure mode of guest + * + * - Issue ucall to terminate the guest on the UV side + * - Unpin the VPA pages (Enables these pages to be migrated back + * when VM becomes secure again) + * - Recreate partition table as the guest is transitioning back to + * normal mode + * - Release all device pages + */ +static int kvmhv_svm_off(struct kvm *kvm) +{ + struct kvm_vcpu *vcpu; + int ret = 0; + int i; + + if (kvmppc_is_guest_secure(kvm)) { + ret = uv_svm_terminate(kvm->arch.lpid); + if (ret != U_SUCCESS) { + ret = -EINVAL; + goto out; + } + + kvm_for_each_vcpu(i, vcpu, kvm) { + spin_lock(&vcpu->arch.vpa_update_lock); + unpin_vpa_reset(kvm, &vcpu->arch.dtl); + unpin_vpa_reset(kvm, &vcpu->arch.slb_shadow); + unpin_vpa_reset(kvm, &vcpu->arch.vpa); + spin_unlock(&vcpu->arch.vpa_update_lock); + } + + ret = kvmppc_reinit_partition_table(kvm); + if (ret) + goto out; + kvm->arch.secure_guest = 0; + for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) + kvmppc_devm_free_memslot_pfns(kvm, + __kvm_memslots(kvm, i)); + } +out: + return ret; +} + static struct kvmppc_ops kvm_ops_hv = { .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, @@ -5446,6 +5515,7 @@ static struct kvmppc_ops kvm_ops_hv = { .enable_nested = kvmhv_enable_nested, .load_from_eaddr = kvmhv_load_from_eaddr, .store_to_eaddr = kvmhv_store_to_eaddr, + .svm_off = kvmhv_svm_off, }; static int kvm_init_subcore_bitmap(void) diff --git a/arch/powerpc/kvm/book3s_hv_devm.c b/arch/powerpc/kvm/book3s_hv_devm.c index 19cfad340a51..6509caf9b926 100644 --- a/arch/powerpc/kvm/book3s_hv_devm.c +++ b/arch/powerpc/kvm/book3s_hv_devm.c @@ -37,6 +37,7 @@ #include #include #include +#include static struct dev_pagemap kvmppc_devm_pgmap; static unsigned long *kvmppc_devm_pfn_bitmap; @@ -85,9 +86,68 @@ unsigned long kvmppc_h_svm_init_done(struct kvm *kvm) return H_UNSUPPORTED; kvm->arch.secure_guest |= KVMPPC_SECURE_INIT_DONE; + if (kvm_is_radix(kvm)) { + pr_info("LPID %d went secure, freeing HV side radix pgtables\n", + kvm->arch.lpid); + kvmppc_free_radix(kvm); + } + return H_SUCCESS; } +/* + * Drop device pages that we maintain for the secure guest + * + * We first mark the pages to be skipped from UV_PAGE_OUT when there + * is HV side fault on these pages. Next we *get* these pages, forcing + * fault on them, do fault time migration to replace the device PTEs in + * QEMU page table with normal PTEs from newly allocated pages. + */ +static void kvmppc_devm_drop_pages(struct kvm_memory_slot *free, + struct kvm *kvm) +{ + int i; + struct kvmppc_devm_page_pvt *pvt; + unsigned long pfn; + + for (i = 0; i < free->npages; i++) { + unsigned long *rmap = &free->arch.rmap[i]; + struct page *devm_page; + + if (kvmppc_rmap_is_devm_pfn(*rmap)) { + devm_page = pfn_to_page(*rmap & ~KVMPPC_RMAP_DEVM_PFN); + pvt = (struct kvmppc_devm_page_pvt *) + devm_page->zone_device_data; + pvt->skip_page_out = true; + + pfn = gfn_to_pfn(kvm, pvt->gpa >> PAGE_SHIFT); + if (is_error_noslot_pfn(pfn)) + continue; + kvm_release_pfn_clean(pfn); + } + } +} + +/* + * Called from KVM_PPC_SVM_OFF ioctl when secure guest is reset + * + * UV has already cleaned up the guest, we release any device pages + * that we maintain + */ +void kvmppc_devm_free_memslot_pfns(struct kvm *kvm, struct kvm_memslots *slots) +{ + struct kvm_memory_slot *memslot; + int srcu_idx; + + if (!slots) + return; + + srcu_idx = srcu_read_lock(&kvm->srcu); + kvm_for_each_memslot(memslot, slots) + kvmppc_devm_drop_pages(memslot, kvm); + srcu_read_unlock(&kvm->srcu, srcu_idx); +} + /* * Get a free device PFN from the pool * diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 0dba7eb24f92..77dceaa8fb55 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -31,6 +31,8 @@ #include #include #endif +#include +#include #include "timing.h" #include "irq.h" @@ -2415,6 +2417,16 @@ long kvm_arch_vm_ioctl(struct file *filp, r = -EFAULT; break; } + case KVM_PPC_SVM_OFF: { + struct kvm *kvm = filp->private_data; + + r = 0; + if (!kvm->arch.kvm_ops->svm_off) + goto out; + + r = kvm->arch.kvm_ops->svm_off(kvm); + break; + } default: { struct kvm *kvm = filp->private_data; r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg); diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index a7c19540ce21..07041a64e21f 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1332,6 +1332,7 @@ struct kvm_s390_ucas_mapping { #define KVM_PPC_GET_CPU_CHAR _IOR(KVMIO, 0xb1, struct kvm_ppc_cpu_char) /* Available with KVM_CAP_PMU_EVENT_FILTER */ #define KVM_SET_PMU_EVENT_FILTER _IOW(KVMIO, 0xb2, struct kvm_pmu_event_filter) +#define KVM_PPC_SVM_OFF _IO(KVMIO, 0xb3) /* ioctl for vm fd */ #define KVM_CREATE_DEVICE _IOWR(KVMIO, 0xe0, struct kvm_create_device) From patchwork Thu Aug 22 10:26:20 2019 Content-Type: text/plain; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 22 Aug 2019 11:26:56 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7MAQY5d42270978 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2019 10:26:34 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id ABC14AE059; Thu, 22 Aug 2019 10:26:54 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EE236AE058; Thu, 22 Aug 2019 10:26:51 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.57.57]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 22 Aug 2019 10:26:51 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, cclaudio@linux.ibm.com, hch@lst.de, Anshuman Khandual , Bharata B Rao Subject: [PATCH v7 7/7] KVM: PPC: Ultravisor: Add PPC_UV config option Date: Thu, 22 Aug 2019 15:56:20 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190822102620.21897-1-bharata@linux.ibm.com> References: <20190822102620.21897-1-bharata@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19082210-4275-0000-0000-0000035BD40F X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19082210-4276-0000-0000-0000386DF9CA Message-Id: <20190822102620.21897-8-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-22_07:,, 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-1908220112 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Anshuman Khandual CONFIG_PPC_UV adds support for ultravisor. Signed-off-by: Anshuman Khandual Signed-off-by: Bharata B Rao Signed-off-by: Ram Pai [ Update config help and commit message ] Signed-off-by: Claudio Carvalho --- arch/powerpc/Kconfig | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index d8dcd8820369..044838794112 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -448,6 +448,23 @@ config PPC_TRANSACTIONAL_MEM help Support user-mode Transactional Memory on POWERPC. +config PPC_UV + bool "Ultravisor support" + depends on KVM_BOOK3S_HV_POSSIBLE + select ZONE_DEVICE + select DEV_PAGEMAP_OPS + select DEVICE_PRIVATE + select MEMORY_HOTPLUG + select MEMORY_HOTREMOVE + default n + help + This option paravirtualizes the kernel to run in POWER platforms that + supports the Protected Execution Facility (PEF). On such platforms, + the ultravisor firmware runs at a privilege level above the + hypervisor. + + If unsure, say "N". + config LD_HEAD_STUB_CATCH bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT depends on PPC64