From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DBC58C3A5A0 for ; Mon, 20 Apr 2020 12:45:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9CFAC22202 for ; Mon, 20 Apr 2020 12:45:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9CFAC22202 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 4EB428E000D; Mon, 20 Apr 2020 08:45:36 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 49C3E8E0003; Mon, 20 Apr 2020 08:45:36 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3B4248E000D; Mon, 20 Apr 2020 08:45:36 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0197.hostedemail.com [216.40.44.197]) by kanga.kvack.org (Postfix) with ESMTP id 24C598E0003 for ; Mon, 20 Apr 2020 08:45:36 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id DFA0B3D01 for ; Mon, 20 Apr 2020 12:45:35 +0000 (UTC) X-FDA: 76728204630.13.flesh41_6b06107788c18 X-HE-Tag: flesh41_6b06107788c18 X-Filterd-Recvd-Size: 7900 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf39.hostedemail.com (Postfix) with ESMTP for ; Mon, 20 Apr 2020 12:45:35 +0000 (UTC) Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 03KCXXSY039390; Mon, 20 Apr 2020 08:45:31 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 30ggxnsga4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Apr 2020 08:45:30 -0400 Received: from m0098410.ppops.net (m0098410.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 03KCXWLq039378; Mon, 20 Apr 2020 08:45:30 -0400 Received: from ppma01wdc.us.ibm.com (fd.55.37a9.ip4.static.sl-reverse.com [169.55.85.253]) by mx0a-001b2d01.pphosted.com with ESMTP id 30ggxnsg9h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Apr 2020 08:45:30 -0400 Received: from pps.filterd (ppma01wdc.us.ibm.com [127.0.0.1]) by ppma01wdc.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 03KCdtld005947; Mon, 20 Apr 2020 12:45:29 GMT Received: from b03cxnp08026.gho.boulder.ibm.com (b03cxnp08026.gho.boulder.ibm.com [9.17.130.18]) by ppma01wdc.us.ibm.com with ESMTP id 30fs65rj1j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Apr 2020 12:45:29 +0000 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 03KCjRER37290462 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 20 Apr 2020 12:45:27 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BE0FA13604F; Mon, 20 Apr 2020 12:45:27 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F0ABF136051; Mon, 20 Apr 2020 12:45:23 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.51.43]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 20 Apr 2020 12:45:23 +0000 (GMT) From: "Aneesh Kumar K.V" To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org Cc: npiggin@gmail.com, paulus@ozlabs.org, leonardo@linux.ibm.com, kirill@shutemov.name, "Aneesh Kumar K.V" Subject: [PATCH v3 09/22] powerpc/kvm/book3s: Add helper to walk partition scoped linux page table. Date: Mon, 20 Apr 2020 18:14:21 +0530 Message-Id: <20200420124434.47330-10-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.25.3 In-Reply-To: <20200420124434.47330-1-aneesh.kumar@linux.ibm.com> References: <20200420124434.47330-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-20_04:2020-04-20,2020-04-20 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 suspectscore=0 lowpriorityscore=0 mlxlogscore=999 bulkscore=0 priorityscore=1501 spamscore=0 malwarescore=0 adultscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004200110 Content-Transfer-Encoding: quoted-printable 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: The locking rules for walking partition scoped table is different from pr= ocess scoped table. Hence add a helper for secondary linux page table walk and = also add check whether we are holding the right locks. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/kvm_book3s_64.h | 13 +++++++++++++ arch/powerpc/kvm/book3s_64_mmu_radix.c | 12 ++++++------ arch/powerpc/kvm/book3s_hv_nested.c | 2 +- 3 files changed, 20 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/incl= ude/asm/kvm_book3s_64.h index 04b2b927bb5a..2c2635967d6e 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -14,6 +14,7 @@ #include #include #include +#include =20 #ifdef CONFIG_PPC_PSERIES static inline bool kvmhv_on_pseries(void) @@ -634,6 +635,18 @@ extern void kvmhv_remove_nest_rmap_range(struct kvm = *kvm, unsigned long gpa, unsigned long hpa, unsigned long nbytes); =20 +static inline pte_t *find_kvm_secondary_pte(struct kvm *kvm, unsigned lo= ng ea, + unsigned *hshift) +{ + pte_t *pte; + + VM_WARN(!spin_is_locked(&kvm->mmu_lock), + "%s called with kvm mmu_lock not held \n", __func__); + pte =3D __find_linux_pte(kvm->arch.pgtable, ea, NULL, hshift); + + return pte; +} + #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ =20 #endif /* __ASM_KVM_BOOK3S_64_H__ */ diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/bo= ok3s_64_mmu_radix.c index 9f050064d2a2..bf8b72a274fa 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -980,11 +980,11 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_mem= ory_slot *memslot, return 0; } =20 - ptep =3D __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); + ptep =3D find_kvm_secondary_pte(kvm, gpa, &shift); if (ptep && pte_present(*ptep)) kvmppc_unmap_pte(kvm, ptep, gpa, shift, memslot, kvm->arch.lpid); - return 0; =09 + return 0; } =20 /* Called with kvm->mmu_lock held */ @@ -1000,7 +1000,7 @@ int kvm_age_radix(struct kvm *kvm, struct kvm_memor= y_slot *memslot, if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) return ref; =20 - ptep =3D __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); + ptep =3D find_kvm_secondary_pte(kvm, gpa, &shift); if (ptep && pte_present(*ptep) && pte_young(*ptep)) { old =3D kvmppc_radix_update_pte(kvm, ptep, _PAGE_ACCESSED, 0, gpa, shift); @@ -1027,7 +1027,7 @@ int kvm_test_age_radix(struct kvm *kvm, struct kvm_= memory_slot *memslot, if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) return ref; =20 - ptep =3D __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); + ptep =3D find_kvm_secondary_pte(kvm, gpa, &shift); if (ptep && pte_present(*ptep) && pte_young(*ptep)) ref =3D 1; return ref; @@ -1047,7 +1047,7 @@ static int kvm_radix_test_clear_dirty(struct kvm *k= vm, if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) return ret; =20 - ptep =3D __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); + ptep =3D find_kvm_secondary_pte(kvm, gpa, &shift); if (ptep && pte_present(*ptep) && pte_dirty(*ptep)) { ret =3D 1; if (shift) @@ -1108,7 +1108,7 @@ void kvmppc_radix_flush_memslot(struct kvm *kvm, gpa =3D memslot->base_gfn << PAGE_SHIFT; spin_lock(&kvm->mmu_lock); for (n =3D memslot->npages; n; --n) { - ptep =3D __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); + ptep =3D find_kvm_secondary_pte(kvm, gpa, &shift); if (ptep && pte_present(*ptep)) kvmppc_unmap_pte(kvm, ptep, gpa, shift, memslot, kvm->arch.lpid); diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3= s_hv_nested.c index dc97e5be76f6..7f1fc5db13ea 100644 --- a/arch/powerpc/kvm/book3s_hv_nested.c +++ b/arch/powerpc/kvm/book3s_hv_nested.c @@ -1362,7 +1362,7 @@ static long int __kvmhv_nested_page_fault(struct kv= m_run *run, /* See if can find translation in our partition scoped tables for L1 */ pte =3D __pte(0); spin_lock(&kvm->mmu_lock); - pte_p =3D __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); + pte_p =3D find_kvm_secondary_pte(kvm, gpa, &shift); if (!shift) shift =3D PAGE_SHIFT; if (pte_p) --=20 2.25.3