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Wed, 14 Dec 2022 14:06:41 -0600 From: Michael Roth To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH RFC v7 05/64] KVM: x86: Add 'update_mem_attr' x86 op Date: Wed, 14 Dec 2022 13:39:57 -0600 Message-ID: <20221214194056.161492-6-michael.roth@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221214194056.161492-1-michael.roth@amd.com> References: <20221214194056.161492-1-michael.roth@amd.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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: CO1NAM11FT063:EE_|BN9PR12MB5161:EE_ X-MS-Office365-Filtering-Correlation-Id: 17ec48fb-14f8-41fb-83a8-08dade0eb801 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: 14 Dec 2022 20:06:42.2799 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 17ec48fb-14f8-41fb-83a8-08dade0eb801 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: CO1NAM11FT063.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN9PR12MB5161 This callback will handle any platform-specific handling needed for converting pages between shared/private. Signed-off-by: Michael Roth --- arch/x86/include/asm/kvm-x86-ops.h | 1 + arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/mmu/mmu.c | 10 ++++++++-- 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h index efae987cdce0..52f94a0ba5e9 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -133,6 +133,7 @@ KVM_X86_OP(vcpu_deliver_sipi_vector) KVM_X86_OP_OPTIONAL_RET0(vcpu_get_apicv_inhibit_reasons); KVM_X86_OP_OPTIONAL_RET0(private_mem_enabled); KVM_X86_OP_OPTIONAL_RET0(fault_is_private); +KVM_X86_OP_OPTIONAL_RET0(update_mem_attr) #undef KVM_X86_OP #undef KVM_X86_OP_OPTIONAL diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 92539708f062..13802389f0f9 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1637,6 +1637,8 @@ struct kvm_x86_ops { int root_level); int (*private_mem_enabled)(struct kvm *kvm); int (*fault_is_private)(struct kvm *kvm, gpa_t gpa, u64 error_code, bool *private_fault); + int (*update_mem_attr)(struct kvm_memory_slot *slot, unsigned int attr, + gfn_t start, gfn_t end); bool (*has_wbinvd_exit)(void); diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 61a7c221b966..a0c41d391547 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -7130,7 +7130,7 @@ static void kvm_update_lpage_private_shared_mixed(struct kvm *kvm, { unsigned long pages, mask; gfn_t gfn, gfn_end, first, last; - int level; + int level, ret; bool mixed; /* @@ -7153,7 +7153,7 @@ static void kvm_update_lpage_private_shared_mixed(struct kvm *kvm, linfo_set_mixed(gfn, slot, level, mixed); if (first == last) - return; + goto out; for (gfn = first + pages; gfn < last; gfn += pages) linfo_set_mixed(gfn, slot, level, false); @@ -7166,6 +7166,12 @@ static void kvm_update_lpage_private_shared_mixed(struct kvm *kvm, mixed = mem_attrs_mixed(kvm, slot, level, attrs, gfn, gfn_end); linfo_set_mixed(gfn, slot, level, mixed); } + +out: + ret = static_call(kvm_x86_update_mem_attr)(slot, attrs, start, end); + if (ret) + pr_warn_ratelimited("Failed to update GFN range 0x%llx-0x%llx with attributes 0x%lx. Ret: %d\n", + start, end, attrs, ret); } void kvm_arch_set_memory_attributes(struct kvm *kvm, -- 2.25.1