From patchwork Thu Mar 19 03:55:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aneesh Kumar K V X-Patchwork-Id: 1257909 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48jY5H74yXz9sSr for ; Thu, 19 Mar 2020 14:57:23 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727223AbgCSD5T (ORCPT ); Wed, 18 Mar 2020 23:57:19 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:4896 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726623AbgCSD5S (ORCPT ); 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Thu, 19 Mar 2020 03:57:02 +0000 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02J3v1J325493916 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 19 Mar 2020 03:57:01 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 59426112064; Thu, 19 Mar 2020 03:57:01 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 00A79112062; Thu, 19 Mar 2020 03:56:58 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.34.213]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Thu, 19 Mar 2020 03:56:57 +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 v2 11/22] powerpc/kvm/book3s: Use kvm helpers to walk shadow or secondary table Date: Thu, 19 Mar 2020 09:25:58 +0530 Message-Id: <20200319035609.158654-12-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200319035609.158654-1-aneesh.kumar@linux.ibm.com> References: <20200319035609.158654-1-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, 18.0.645 definitions=2020-03-18_10:2020-03-18,2020-03-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 mlxscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 adultscore=0 spamscore=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003190013 Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org update kvmppc_hv_handle_set_rc to use find_kvm_nested_guest_pte and find_kvm_secondary_pte Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/include/asm/kvm_book3s.h | 2 +- arch/powerpc/include/asm/kvm_book3s_64.h | 3 +++ arch/powerpc/kvm/book3s_64_mmu_radix.c | 18 +++++++++--------- arch/powerpc/kvm/book3s_hv_nested.c | 13 ++++++------- 4 files changed, 19 insertions(+), 17 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index 506e4df2d730..37c8b50cb505 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -198,7 +198,7 @@ extern void kvmppc_unmap_pte(struct kvm *kvm, pte_t *pte, unsigned long gpa, unsigned int shift, const struct kvm_memory_slot *memslot, unsigned int lpid); -extern bool kvmppc_hv_handle_set_rc(struct kvm *kvm, pgd_t *pgtable, +extern bool kvmppc_hv_handle_set_rc(struct kvm *kvm, bool nested, bool writing, unsigned long gpa, unsigned int lpid); extern int kvmppc_book3s_instantiate_page(struct kvm_vcpu *vcpu, diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index 2c2635967d6e..2860521992b6 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -647,6 +647,9 @@ static inline pte_t *find_kvm_secondary_pte(struct kvm *kvm, unsigned long ea, return pte; } +extern pte_t *find_kvm_nested_guest_pte(struct kvm *kvm, unsigned long lpid, + unsigned long ea, unsigned *hshift); + #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ #endif /* __ASM_KVM_BOOK3S_64_H__ */ diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index d769d7e31047..f0b021052e33 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -735,7 +735,7 @@ int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte, return ret; } -bool kvmppc_hv_handle_set_rc(struct kvm *kvm, pgd_t *pgtable, bool writing, +bool kvmppc_hv_handle_set_rc(struct kvm *kvm, bool nested, bool writing, unsigned long gpa, unsigned int lpid) { unsigned long pgflags; @@ -750,12 +750,12 @@ bool kvmppc_hv_handle_set_rc(struct kvm *kvm, pgd_t *pgtable, bool writing, pgflags = _PAGE_ACCESSED; if (writing) pgflags |= _PAGE_DIRTY; - /* - * We are walking the secondary (partition-scoped) page table here. - * We can do this without disabling irq because the Linux MM - * subsystem doesn't do THP splits and collapses on this tree. - */ - ptep = __find_linux_pte(pgtable, gpa, NULL, &shift); + + if (nested) + ptep = find_kvm_nested_guest_pte(kvm, lpid, gpa, &shift); + else + ptep = find_kvm_secondary_pte(kvm, gpa, &shift); + if (ptep && pte_present(*ptep) && (!writing || pte_write(*ptep))) { kvmppc_radix_update_pte(kvm, ptep, 0, pgflags, gpa, shift); return true; @@ -948,8 +948,8 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, /* Failed to set the reference/change bits */ if (dsisr & DSISR_SET_RC) { spin_lock(&kvm->mmu_lock); - if (kvmppc_hv_handle_set_rc(kvm, kvm->arch.pgtable, - writing, gpa, kvm->arch.lpid)) + if (kvmppc_hv_handle_set_rc(kvm, false, writing, + gpa, kvm->arch.lpid)) dsisr &= ~DSISR_SET_RC; spin_unlock(&kvm->mmu_lock); diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3s_hv_nested.c index b2cc3eaec618..99011f1b772a 100644 --- a/arch/powerpc/kvm/book3s_hv_nested.c +++ b/arch/powerpc/kvm/book3s_hv_nested.c @@ -750,8 +750,8 @@ static struct kvm_nested_guest *kvmhv_find_nested(struct kvm *kvm, int lpid) return kvm->arch.nested_guests[lpid]; } -static pte_t *find_kvm_nested_guest_pte(struct kvm *kvm, unsigned long lpid, - unsigned long ea, unsigned *hshift) +pte_t *find_kvm_nested_guest_pte(struct kvm *kvm, unsigned long lpid, + unsigned long ea, unsigned *hshift) { struct kvm_nested_guest *gp; pte_t *pte; @@ -767,7 +767,6 @@ static pte_t *find_kvm_nested_guest_pte(struct kvm *kvm, unsigned long lpid, return pte; } - static inline bool kvmhv_n_rmap_is_equal(u64 rmap_1, u64 rmap_2) { return !((rmap_1 ^ rmap_2) & (RMAP_NESTED_LPID_MASK | @@ -1226,16 +1225,16 @@ static long kvmhv_handle_nested_set_rc(struct kvm_vcpu *vcpu, spin_lock(&kvm->mmu_lock); /* Set the rc bit in the pte of our (L0) pgtable for the L1 guest */ - ret = kvmppc_hv_handle_set_rc(kvm, kvm->arch.pgtable, writing, - gpte.raddr, kvm->arch.lpid); + ret = kvmppc_hv_handle_set_rc(kvm, false, writing, + gpte.raddr, kvm->arch.lpid); if (!ret) { ret = -EINVAL; goto out_unlock; } /* Set the rc bit in the pte of the shadow_pgtable for the nest guest */ - ret = kvmppc_hv_handle_set_rc(kvm, gp->shadow_pgtable, writing, n_gpa, - gp->shadow_lpid); + ret = kvmppc_hv_handle_set_rc(kvm, true, writing, + n_gpa, gp->shadow_lpid); if (!ret) ret = -EINVAL; else