From: isaku.yamahata@intel.com
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H . Peter Anvin" <hpa@zytor.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com,
Sean Christopherson <sean.j.christopherson@intel.com>,
Xiaoyao Li <xiaoyao.li@intel.com>
Subject: [RFC PATCH 15/67] KVM: x86: Add vm_type to differentiate legacy VMs from protected VMs
Date: Mon, 16 Nov 2020 10:26:00 -0800 [thread overview]
Message-ID: <e4879f4528d8e282d8b10c3dbc5526fa88b93e62.1605232743.git.isaku.yamahata@intel.com> (raw)
In-Reply-To: <cover.1605232743.git.isaku.yamahata@intel.com>
In-Reply-To: <cover.1605232743.git.isaku.yamahata@intel.com>
From: Sean Christopherson <sean.j.christopherson@intel.com>
Add a capability to effectively allow userspace to query what VM types
are supported by KVM.
Co-developed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/include/asm/kvm_host.h | 2 ++
arch/x86/include/uapi/asm/kvm.h | 4 ++++
arch/x86/kvm/svm/svm.c | 6 ++++++
arch/x86/kvm/vmx/vmx.c | 6 ++++++
arch/x86/kvm/x86.c | 9 ++++++++-
include/uapi/linux/kvm.h | 2 ++
tools/arch/x86/include/uapi/asm/kvm.h | 4 ++++
tools/include/uapi/linux/kvm.h | 2 ++
8 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c2639744ea09..1ff33efd6394 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -897,6 +897,7 @@ enum kvm_irqchip_mode {
#define APICV_INHIBIT_REASON_X2APIC 5
struct kvm_arch {
+ unsigned long vm_type;
unsigned long n_used_mmu_pages;
unsigned long n_requested_mmu_pages;
unsigned long n_max_mmu_pages;
@@ -1090,6 +1091,7 @@ struct kvm_x86_ops {
bool (*has_emulated_msr)(u32 index);
void (*vcpu_after_set_cpuid)(struct kvm_vcpu *vcpu);
+ bool (*is_vm_type_supported)(unsigned long vm_type);
unsigned int vm_size;
int (*vm_init)(struct kvm *kvm);
void (*vm_destroy)(struct kvm *kvm);
diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
index 89e5f3d1bba8..29cdf262e516 100644
--- a/arch/x86/include/uapi/asm/kvm.h
+++ b/arch/x86/include/uapi/asm/kvm.h
@@ -486,4 +486,8 @@ struct kvm_pmu_event_filter {
#define KVM_PMU_EVENT_ALLOW 0
#define KVM_PMU_EVENT_DENY 1
+#define KVM_X86_LEGACY_VM 0
+#define KVM_X86_SEV_ES_VM 1
+#define KVM_X86_TDX_VM 2
+
#endif /* _ASM_X86_KVM_H */
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index e001e3c9e4bc..11ab330a9b55 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4161,6 +4161,11 @@ static void svm_vm_destroy(struct kvm *kvm)
sev_vm_destroy(kvm);
}
+static bool svm_is_vm_type_supported(unsigned long type)
+{
+ return type == KVM_X86_LEGACY_VM;
+}
+
static int svm_vm_init(struct kvm *kvm)
{
if (!pause_filter_count || !pause_filter_thresh)
@@ -4187,6 +4192,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.vcpu_free = svm_free_vcpu,
.vcpu_reset = svm_vcpu_reset,
+ .is_vm_type_supported = svm_is_vm_type_supported,
.vm_size = sizeof(struct kvm_svm),
.vm_init = svm_vm_init,
.vm_destroy = svm_vm_destroy,
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 0703d82e7bad..b3ecdb96789a 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6966,6 +6966,11 @@ static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
return err;
}
+static bool vmx_is_vm_type_supported(unsigned long type)
+{
+ return type == KVM_X86_LEGACY_VM;
+}
+
#define L1TF_MSG_SMT "L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.\n"
#define L1TF_MSG_L1D "L1TF CPU bug present and virtualization mitigation disabled, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.\n"
@@ -7603,6 +7608,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.cpu_has_accelerated_tpr = report_flexpriority,
.has_emulated_msr = vmx_has_emulated_msr,
+ .is_vm_type_supported = vmx_is_vm_type_supported,
.vm_size = sizeof(struct kvm_vmx),
.vm_init = vmx_vm_init,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 19b53aedc6c8..346394d83672 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3771,6 +3771,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_STEAL_TIME:
r = sched_info_on();
break;
+ case KVM_CAP_VM_TYPES:
+ r = BIT(KVM_X86_LEGACY_VM);
+ if (kvm_x86_ops.is_vm_type_supported(KVM_X86_TDX_VM))
+ r |= BIT(KVM_X86_TDX_VM);
+ break;
default:
break;
}
@@ -10249,9 +10254,11 @@ void kvm_arch_free_vm(struct kvm *kvm)
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
- if (type)
+ if (!kvm_x86_ops.is_vm_type_supported(type))
return -EINVAL;
+ kvm->arch.vm_type = type;
+
INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list);
INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages);
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index ca41220b40b8..c603e9a004f1 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1054,6 +1054,8 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_X86_MSR_FILTER 189
#define KVM_CAP_ENFORCE_PV_FEATURE_CPUID 190
+#define KVM_CAP_VM_TYPES 1000
+
#ifdef KVM_CAP_IRQ_ROUTING
struct kvm_irq_routing_irqchip {
diff --git a/tools/arch/x86/include/uapi/asm/kvm.h b/tools/arch/x86/include/uapi/asm/kvm.h
index 0780f97c1850..44313ac967dd 100644
--- a/tools/arch/x86/include/uapi/asm/kvm.h
+++ b/tools/arch/x86/include/uapi/asm/kvm.h
@@ -466,4 +466,8 @@ struct kvm_pmu_event_filter {
#define KVM_PMU_EVENT_ALLOW 0
#define KVM_PMU_EVENT_DENY 1
+#define KVM_X86_LEGACY_VM 0
+#define KVM_X86_SEV_ES_VM 1
+#define KVM_X86_TDX_VM 2
+
#endif /* _ASM_X86_KVM_H */
diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h
index 7d8eced6f459..b043b01f0d87 100644
--- a/tools/include/uapi/linux/kvm.h
+++ b/tools/include/uapi/linux/kvm.h
@@ -1038,6 +1038,8 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_S390_DIAG318 186
#define KVM_CAP_STEAL_TIME 187
+#define KVM_CAP_VM_TYPES 1000
+
#ifdef KVM_CAP_IRQ_ROUTING
struct kvm_irq_routing_irqchip {
--
2.17.1
next prev parent reply other threads:[~2020-11-16 18:33 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-16 18:25 [RFC PATCH 00/67] KVM: X86: TDX support isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 01/67] x86/cpufeatures: Add synthetic feature flag for TDX (in host) isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 02/67] x86/msr-index: Define MSR_IA32_MKTME_KEYID_PART used by TDX isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 03/67] x86/cpu: Move get_builtin_firmware() common code (from microcode only) isaku.yamahata
2020-11-25 22:09 ` Borislav Petkov
2020-11-26 0:18 ` Sean Christopherson
2020-11-26 10:12 ` Borislav Petkov
2020-11-30 19:18 ` Sean Christopherson
2020-11-16 18:25 ` [RFC PATCH 04/67] KVM: Export kvm_io_bus_read for use by TDX for PV MMIO isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 05/67] KVM: Enable hardware before doing arch VM initialization isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 06/67] KVM: x86: Split core of hypercall emulation to helper function isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 07/67] KVM: x86: Export kvm_mmio tracepoint for use by TDX for PV MMIO isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 08/67] KVM: x86/mmu: Zap only leaf SPTEs for deleted/moved memslot by default isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 09/67] KVM: Add infrastructure and macro to mark VM as bugged isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 10/67] KVM: Export kvm_make_all_cpus_request() for use in marking VMs " isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 11/67] KVM: x86: Use KVM_BUG/KVM_BUG_ON to handle bugs that are fatal to the VM isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 12/67] KVM: x86/mmu: Mark VM as bugged if page fault returns RET_PF_INVALID isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 13/67] KVM: VMX: Explicitly check for hv_remote_flush_tlb when loading pgd() isaku.yamahata
2020-11-16 18:25 ` [RFC PATCH 14/67] KVM: Add max_vcpus field in common 'struct kvm' isaku.yamahata
2020-11-16 18:26 ` isaku.yamahata [this message]
2020-11-16 18:26 ` [RFC PATCH 16/67] KVM: x86: Hoist kvm_dirty_regs check out of sync_regs() isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 17/67] KVM: x86: Introduce "protected guest" concept and block disallowed ioctls isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 18/67] KVM: x86: Add per-VM flag to disable direct IRQ injection isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 19/67] KVM: x86: Add flag to disallow #MC injection / KVM_X86_SETUP_MCE isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 20/67] KVM: x86: Make KVM_CAP_X86_SMM a per-VM capability isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 21/67] KVM: x86: Add flag to mark TSC as immutable (for TDX) isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 22/67] KVM: Add per-VM flag to mark read-only memory as unsupported isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 23/67] KVM: Add per-VM flag to disable dirty logging of memslots for TDs isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 24/67] KVM: x86: Add per-VM flag to disable in-kernel I/O APIC and level routes isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 25/67] KVM: x86: Allow host-initiated WRMSR to set X2APIC regardless of CPUID isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 26/67] KVM: x86: Add kvm_x86_ops .cache_gprs() and .flush_gprs() isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 27/67] KVM: x86: Add support for vCPU and device-scoped KVM_MEMORY_ENCRYPT_OP isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 28/67] KVM: x86: Introduce vm_teardown() hook in kvm_arch_vm_destroy() isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 29/67] KVM: x86: Add a switch_db_regs flag to handle TDX's auto-switched behavior isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 30/67] KVM: x86: Check for pending APICv interrupt in kvm_vcpu_has_events() isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 31/67] KVM: x86: Add option to force LAPIC expiration wait isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 32/67] KVM: x86: Add guest_supported_xss placholder isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 33/67] KVM: Export kvm_is_reserved_pfn() for use by TDX isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 34/67] KVM: x86: Add infrastructure for stolen GPA bits isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 35/67] KVM: x86/mmu: Explicitly check for MMIO spte in fast page fault isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 36/67] KVM: x86/mmu: Track shadow MMIO value on a per-VM basis isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 37/67] KVM: x86/mmu: Ignore bits 63 and 62 when checking for "present" SPTEs isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 38/67] KVM: x86/mmu: Allow non-zero init value for shadow PTE isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 39/67] KVM: x86/mmu: Refactor shadow walk in __direct_map() to reduce indentation isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 40/67] KVM: x86/mmu: Return old SPTE from mmu_spte_clear_track_bits() isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 41/67] KVM: x86/mmu: Frame in support for private/inaccessible shadow pages isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 42/67] KVM: x86/mmu: Move 'pfn' variable to caller of direct_page_fault() isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 43/67] KVM: x86/mmu: Introduce kvm_mmu_map_tdp_page() for use by TDX isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 44/67] KVM: VMX: Modify NMI and INTR handlers to take intr_info as param isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 45/67] KVM: VMX: Move NMI/exception handler to common helper isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 46/67] KVM: VMX: Split out guts of EPT violation to common/exposed function isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 47/67] KVM: VMX: Define EPT Violation architectural bits isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 48/67] KVM: VMX: Define VMCS encodings for shared EPT pointer isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 49/67] KVM: VMX: Add 'main.c' to wrap VMX and TDX isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 50/67] KVM: VMX: Move setting of EPT MMU masks to common VT-x code isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 51/67] KVM: VMX: Move register caching logic to common code isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 52/67] KVM: TDX: Add TDX "architectural" error codes isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 53/67] KVM: TDX: Add architectural definitions for structures and values isaku.yamahata
2021-06-11 2:25 ` Erdem Aktas
2020-11-16 18:26 ` [RFC PATCH 54/67] KVM: TDX: Define TDCALL exit reason isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 55/67] KVM: TDX: Add SEAMRR related MSRs macro definition isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 56/67] KVM: TDX: Add macro framework to wrap TDX SEAMCALLs isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 57/67] KVM: TDX: Stub in tdx.h with structs, accessors, and VMCS helpers isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 58/67] KVM: VMX: Add macro framework to read/write VMCS for VMs and TDs isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 59/67] KVM: VMX: Move AR_BYTES encoder/decoder helpers to common.h isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 60/67] KVM: VMX: MOVE GDT and IDT accessors to common code isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 61/67] KVM: VMX: Move .get_interrupt_shadow() implementation to common VMX code isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 62/67] KVM: TDX: Load and init TDX-SEAM module during boot isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 63/67] cpu/hotplug: Document that TDX also depends on booting CPUs once isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 64/67] KVM: TDX: Add "basic" support for building and running Trust Domains isaku.yamahata
[not found] ` <CAAYXXYwHp-wiAsSjfsLngriGZpdQHUVY6o7zdGrN2fNm_RJZAQ@mail.gmail.com>
2021-06-11 15:22 ` Sean Christopherson
[not found] ` <CAAYXXYxX_ns-D_OJCOkA+jgzSV6Hb=oHyLDb5fYMwF-2X5QAgQ@mail.gmail.com>
2021-06-15 1:10 ` Isaku Yamahata
2020-11-16 18:26 ` [RFC PATCH 65/67] KVM: x86: Mark the VM (TD) as bugged if non-coherent DMA is detected isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 66/67] fixup! KVM: TDX: Add "basic" support for building and running Trust Domains isaku.yamahata
2020-11-16 18:26 ` [RFC PATCH 67/67] KVM: X86: not for review: add dummy file for TDX-SEAM module isaku.yamahata
2021-05-19 16:37 ` [RFC PATCH 00/67] KVM: X86: TDX support Connor Kuehl
2021-05-20 9:31 ` Isaku Yamahata
2021-05-21 14:09 ` Connor Kuehl
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