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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL02EPF0001A0FB.mail.protection.outlook.com (10.167.242.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6838.22 via Frontend Transport; Mon, 16 Oct 2023 13:40:52 +0000 Received: from localhost (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Mon, 16 Oct 2023 08:40:51 -0500 From: Michael Roth To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Brijesh Singh Subject: [PATCH v10 34/50] KVM: x86: Export the kvm_zap_gfn_range() for the SNP use Date: Mon, 16 Oct 2023 08:28:03 -0500 Message-ID: <20231016132819.1002933-35-michael.roth@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231016132819.1002933-1-michael.roth@amd.com> References: <20231016132819.1002933-1-michael.roth@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A0FB:EE_|CH2PR12MB4889:EE_ X-MS-Office365-Filtering-Correlation-Id: 44cacf42-17ce-4f79-9279-08dbce4d83cc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Oct 2023 13:40:52.1457 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 44cacf42-17ce-4f79-9279-08dbce4d83cc X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A0FB.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4889 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Brijesh Singh While resolving the RMP page fault, there may be cases where the page level between the RMP entry and TDP does not match and the 2M RMP entry must be split into 4K RMP entries. Or a 2M TDP page need to be broken into multiple of 4K pages. To keep the RMP and TDP page level in sync, zap the gfn range after splitting the pages in the RMP entry. The zap should force the TDP to gets rebuilt with the new page level. Signed-off-by: Brijesh Singh Signed-off-by: Ashish Kalra --- arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/mmu.h | 2 -- arch/x86/kvm/mmu/mmu.c | 1 + 3 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a3983271ea28..b9e783d34e94 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1872,6 +1872,8 @@ void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm, const struct kvm_memory_slot *memslot); void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen); void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages); +void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); + int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 253fb2093d5d..40111f4dae9e 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -237,8 +237,6 @@ static inline u8 permission_fault(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, return -(u32)fault & errcode; } -void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); - int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu); int kvm_mmu_post_init_vm(struct kvm *kvm); diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 10c323e2faa4..8c78807e0f45 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -6702,6 +6702,7 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm, return need_tlb_flush; } +EXPORT_SYMBOL_GPL(kvm_zap_gfn_range); static void kvm_rmap_zap_collapsible_sptes(struct kvm *kvm, const struct kvm_memory_slot *slot) -- 2.25.1