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From: Alexandre Chartre <alexandre.chartre@oracle.com>
To: pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de,
	mingo@redhat.com, bp@alien8.de, hpa@zytor.com,
	dave.hansen@linux.intel.com, luto@kernel.org,
	peterz@infradead.org, kvm@vger.kernel.org, x86@kernel.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: konrad.wilk@oracle.com, jan.setjeeilers@oracle.com,
	liran.alon@oracle.com, jwadams@google.com,
	alexandre.chartre@oracle.com
Subject: [RFC KVM 21/27] kvm/isolation: initialize the KVM page table with vmx VM data
Date: Mon, 13 May 2019 16:38:29 +0200	[thread overview]
Message-ID: <1557758315-12667-22-git-send-email-alexandre.chartre@oracle.com> (raw)
In-Reply-To: <1557758315-12667-1-git-send-email-alexandre.chartre@oracle.com>

Map VM data, in particular the kvm structure data.

Signed-off-by: Alexandre Chartre <alexandre.chartre@oracle.com>
---
 arch/x86/kvm/isolation.c |   17 +++++++++++++++++
 arch/x86/kvm/isolation.h |    2 ++
 arch/x86/kvm/vmx/vmx.c   |   31 ++++++++++++++++++++++++++++++-
 arch/x86/kvm/x86.c       |   12 ++++++++++++
 include/linux/kvm_host.h |    1 +
 virt/kvm/arm/arm.c       |    4 ++++
 virt/kvm/kvm_main.c      |    2 +-
 7 files changed, 67 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/isolation.c b/arch/x86/kvm/isolation.c
index cf5ee0d..d3ac014 100644
--- a/arch/x86/kvm/isolation.c
+++ b/arch/x86/kvm/isolation.c
@@ -1222,6 +1222,23 @@ static void kvm_isolation_clear_handlers(void)
 	kvm_set_isolation_exit_handler(NULL);
 }
 
+int kvm_isolation_init_vm(struct kvm *kvm)
+{
+	if (!kvm_isolation())
+		return 0;
+
+	return (kvm_copy_percpu_mapping(kvm->srcu.sda,
+		sizeof(struct srcu_data)));
+}
+
+void kvm_isolation_destroy_vm(struct kvm *kvm)
+{
+	if (!kvm_isolation())
+		return;
+
+	kvm_clear_percpu_mapping(kvm->srcu.sda);
+}
+
 int kvm_isolation_init(void)
 {
 	int r;
diff --git a/arch/x86/kvm/isolation.h b/arch/x86/kvm/isolation.h
index 1f79e28..33e9a87 100644
--- a/arch/x86/kvm/isolation.h
+++ b/arch/x86/kvm/isolation.h
@@ -23,6 +23,8 @@ static inline bool kvm_isolation(void)
 
 extern int kvm_isolation_init(void);
 extern void kvm_isolation_uninit(void);
+extern int kvm_isolation_init_vm(struct kvm *kvm);
+extern void kvm_isolation_destroy_vm(struct kvm *kvm);
 extern void kvm_isolation_enter(void);
 extern void kvm_isolation_exit(void);
 extern void kvm_may_access_sensitive_data(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index f181b3c..5b52e8c 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6523,6 +6523,33 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
 	vmx_complete_interrupts(vmx);
 }
 
+static void vmx_unmap_vm(struct kvm *kvm)
+{
+	struct kvm_vmx *kvm_vmx = to_kvm_vmx(kvm);
+
+	if (!kvm_isolation())
+		return;
+
+	pr_debug("unmapping kvm %p", kvm_vmx);
+	kvm_clear_range_mapping(kvm_vmx);
+}
+
+static int vmx_map_vm(struct kvm *kvm)
+{
+	struct kvm_vmx *kvm_vmx = to_kvm_vmx(kvm);
+
+	if (!kvm_isolation())
+		return 0;
+
+	pr_debug("mapping kvm %p", kvm_vmx);
+	/*
+	 * Only copy kvm_vmx struct mapping because other
+	 * attributes (like kvm->srcu) are not initialized
+	 * yet.
+	 */
+	return kvm_copy_ptes(kvm_vmx, sizeof(struct kvm_vmx));
+}
+
 static struct kvm *vmx_vm_alloc(void)
 {
 	struct kvm_vmx *kvm_vmx = __vmalloc(sizeof(struct kvm_vmx),
@@ -6533,6 +6560,7 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
 
 static void vmx_vm_free(struct kvm *kvm)
 {
+	vmx_unmap_vm(kvm);
 	vfree(to_kvm_vmx(kvm));
 }
 
@@ -6702,7 +6730,8 @@ static int vmx_vm_init(struct kvm *kvm)
 			break;
 		}
 	}
-	return 0;
+
+	return (vmx_map_vm(kvm));
 }
 
 static void __init vmx_check_processor_compat(void *rtn)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1db72c3..e1cc3a6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9207,6 +9207,17 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 	return 0;
 }
 
+void kvm_arch_vm_postcreate(struct kvm *kvm)
+{
+	/*
+	 * The kvm structure is mapped in vmx.c so that the full kvm_vmx
+	 * structure can be mapped. Attributes allocated in the kvm
+	 * structure (like kvm->srcu) are mapped by kvm_isolation_init_vm()
+	 * because they are not initialized when vmx.c maps the kvm structure.
+	 */
+	kvm_isolation_init_vm(kvm);
+}
+
 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
 {
 	vcpu_load(vcpu);
@@ -9320,6 +9331,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
 		x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0);
 		x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0);
 	}
+	kvm_isolation_destroy_vm(kvm);
 	if (kvm_x86_ops->vm_destroy)
 		kvm_x86_ops->vm_destroy(kvm);
 	kvm_pic_destroy(kvm);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 640a036..ad24d9e 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -932,6 +932,7 @@ static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
 
 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
 void kvm_arch_destroy_vm(struct kvm *kvm);
+void kvm_arch_vm_postcreate(struct kvm *kvm);
 void kvm_arch_sync_events(struct kvm *kvm);
 
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index f412ebc..0921cb3 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -156,6 +156,10 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 	return ret;
 }
 
+void kvm_arch_vm_postcreate(struct kvm *kvm)
+{
+}
+
 bool kvm_arch_has_vcpu_debugfs(void)
 {
 	return false;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a704d1f..3c0c3db 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3366,7 +3366,7 @@ static int kvm_dev_ioctl_create_vm(unsigned long type)
 		return -ENOMEM;
 	}
 	kvm_uevent_notify_change(KVM_EVENT_CREATE_VM, kvm);
-
+	kvm_arch_vm_postcreate(kvm);
 	fd_install(r, file);
 	return r;
 
-- 
1.7.1


  parent reply	other threads:[~2019-05-13 14:40 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-13 14:38 [RFC KVM 00/27] KVM Address Space Isolation Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 01/27] kernel: Export memory-management symbols required for KVM address space isolation Alexandre Chartre
2019-05-13 15:15   ` Peter Zijlstra
2019-05-13 15:17     ` Liran Alon
2019-05-13 14:38 ` [RFC KVM 02/27] KVM: x86: Introduce address_space_isolation module parameter Alexandre Chartre
2019-05-13 15:46   ` Andy Lutomirski
2019-05-13 15:55     ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 03/27] KVM: x86: Introduce KVM separate virtual address space Alexandre Chartre
2019-05-13 15:45   ` Andy Lutomirski
2019-05-13 16:04     ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 04/27] KVM: x86: Switch to KVM address space on entry to guest Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 05/27] KVM: x86: Add handler to exit kvm isolation Alexandre Chartre
2019-05-13 15:49   ` Andy Lutomirski
2019-05-13 16:10     ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 06/27] KVM: x86: Exit KVM isolation on IRQ entry Alexandre Chartre
2019-05-13 15:51   ` Andy Lutomirski
2019-05-13 16:28     ` Alexandre Chartre
2019-05-13 18:13       ` Andy Lutomirski
2019-05-14  7:07         ` Peter Zijlstra
2019-05-14  7:58           ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 07/27] KVM: x86: Switch to host address space when may access sensitive data Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 08/27] KVM: x86: Optimize branches which checks if address space isolation enabled Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 09/27] kvm/isolation: function to track buffers allocated for the KVM page table Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 10/27] kvm/isolation: add KVM page table entry free functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 11/27] kvm/isolation: add KVM page table entry offset functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 12/27] kvm/isolation: add KVM page table entry allocation functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 13/27] kvm/isolation: add KVM page table entry set functions Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 14/27] kvm/isolation: functions to copy page table entries for a VA range Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 15/27] kvm/isolation: keep track of VA range mapped in KVM address space Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 16/27] kvm/isolation: functions to clear page table entries for a VA range Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 17/27] kvm/isolation: improve mapping copy when mapping is already present Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 18/27] kvm/isolation: function to copy page table entries for percpu buffer Alexandre Chartre
2019-05-13 18:18   ` Andy Lutomirski
2019-05-14  7:09     ` Peter Zijlstra
2019-05-14  8:25       ` Alexandre Chartre
2019-05-14  8:34         ` Andy Lutomirski
2019-05-14  9:41           ` Alexandre Chartre
2019-05-14 15:23             ` Andy Lutomirski
2019-05-14 16:24               ` Alexandre Chartre
2019-05-14 17:05                 ` Peter Zijlstra
2019-05-14 18:09                   ` Sean Christopherson
2019-05-14 20:33                     ` Andy Lutomirski
2019-05-14 21:06                       ` Sean Christopherson
2019-05-14 21:55                         ` Andy Lutomirski
2019-05-14 22:38                           ` Sean Christopherson
2019-05-18  0:05                             ` Jonathan Adams
2019-05-14 20:27                   ` Andy Lutomirski
2019-05-13 14:38 ` [RFC KVM 19/27] kvm/isolation: initialize the KVM page table with core mappings Alexandre Chartre
2019-05-13 15:50   ` Dave Hansen
2019-05-13 16:00     ` Andy Lutomirski
2019-05-13 17:00       ` Alexandre Chartre
2019-05-13 16:46     ` Sean Christopherson
2019-05-13 16:47     ` Alexandre Chartre
2019-05-14 10:26       ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 20/27] kvm/isolation: initialize the KVM page table with vmx specific data Alexandre Chartre
2019-05-13 14:38 ` Alexandre Chartre [this message]
2019-05-13 14:38 ` [RFC KVM 22/27] kvm/isolation: initialize the KVM page table with vmx cpu data Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 23/27] kvm/isolation: initialize the KVM page table with the vcpu tasks Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 24/27] kvm/isolation: KVM page fault handler Alexandre Chartre
2019-05-13 15:15   ` Peter Zijlstra
2019-05-13 21:25     ` Liran Alon
2019-05-14  2:02       ` Andy Lutomirski
2019-05-14  7:21         ` Peter Zijlstra
2019-05-14 15:36           ` Alexandre Chartre
2019-05-14 15:43             ` Andy Lutomirski
2019-05-13 16:02   ` Andy Lutomirski
2019-05-13 16:21     ` Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 25/27] kvm/isolation: implement actual KVM isolation enter/exit Alexandre Chartre
2019-05-13 15:16   ` Peter Zijlstra
2019-05-13 16:01   ` Andy Lutomirski
2019-05-13 14:38 ` [RFC KVM 26/27] kvm/isolation: initialize the KVM page table with KVM memslots Alexandre Chartre
2019-05-13 14:38 ` [RFC KVM 27/27] kvm/isolation: initialize the KVM page table with KVM buses Alexandre Chartre
2019-05-13 16:42 ` [RFC KVM 00/27] KVM Address Space Isolation Liran Alon
2019-05-13 18:17 ` Andy Lutomirski
2019-05-13 21:08   ` Liran Alon
2019-05-14  2:07     ` Andy Lutomirski
2019-05-14  7:37       ` Peter Zijlstra
2019-05-14 21:32         ` Jan Setje-Eilers
2019-05-14  8:05       ` Liran Alon
2019-05-14  7:29     ` Peter Zijlstra
2019-05-14  7:57       ` Liran Alon
2019-05-14  8:33     ` Alexandre Chartre
2019-05-13 19:31 ` Nakajima, Jun
2019-05-13 21:16   ` Liran Alon
     [not found]     ` <D07C8F51-F2DF-4C8B-AB3B-0DFABD5F4C33@intel.com>
2019-05-13 21:53       ` Liran Alon
2019-05-15 12:52 ` Alexandre Chartre

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