From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
Maxim Levitsky <mlevitsk@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Michael Kelley <mikelley@microsoft.com>,
Siddharth Chandrasekaran <sidcha@amazon.de>,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 22/37] KVM: x86: Expose Hyper-V L2 TLB flush feature
Date: Wed, 25 May 2022 11:01:18 +0200 [thread overview]
Message-ID: <20220525090133.1264239-23-vkuznets@redhat.com> (raw)
In-Reply-To: <20220525090133.1264239-1-vkuznets@redhat.com>
With both nSVM and nVMX implementations in place, KVM can now expose
Hyper-V L2 TLB flush feature to userspace.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/hyperv.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 9a41835ff4bc..7cdad050a5b7 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -2774,6 +2774,7 @@ int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
case HYPERV_CPUID_NESTED_FEATURES:
ent->eax = evmcs_ver;
+ ent->eax |= HV_X64_NESTED_DIRECT_FLUSH;
ent->eax |= HV_X64_NESTED_MSR_BITMAP;
break;
--
2.35.3
next prev parent reply other threads:[~2022-05-25 9:05 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-25 9:00 [PATCH v4 00/37] KVM: x86: hyper-v: Fine-grained TLB flush + L2 TLB flush features Vitaly Kuznetsov
2022-05-25 9:00 ` [PATCH v4 01/37] KVM: x86: Rename 'enable_direct_tlbflush' to 'enable_l2_tlb_flush' Vitaly Kuznetsov
2022-05-25 9:00 ` [PATCH v4 02/37] KVM: x86: hyper-v: Resurrect dedicated KVM_REQ_HV_TLB_FLUSH flag Vitaly Kuznetsov
2022-05-27 3:00 ` Yuan Yao
2022-05-25 9:00 ` [PATCH v4 03/37] KVM: x86: hyper-v: Introduce TLB flush fifo Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 04/37] KVM: x86: hyper-v: Add helper to read hypercall data for array Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 05/37] KVM: x86: hyper-v: Handle HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} calls gently Vitaly Kuznetsov
2022-05-27 8:39 ` Yuan Yao
2022-05-27 11:43 ` Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 06/37] KVM: x86: hyper-v: Expose support for extended gva ranges for flush hypercalls Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 07/37] KVM: x86: Prepare kvm_hv_flush_tlb() to handle L2's GPAs Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 08/37] x86/hyperv: Introduce HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK constants Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 09/37] KVM: x86: hyper-v: Use HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK instead of raw '64' Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 10/37] KVM: x86: hyper-v: Don't use sparse_set_to_vcpu_mask() in kvm_hv_send_ipi() Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 11/37] KVM: x86: hyper-v: Create a separate fifo for L2 TLB flush Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 12/37] KVM: x86: hyper-v: Use preallocated buffer in 'struct kvm_vcpu_hv' instead of on-stack 'sparse_banks' Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 13/37] KVM: nVMX: Keep track of hv_vm_id/hv_vp_id when eVMCS is in use Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 14/37] KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 15/37] KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush() nested hook Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 16/37] KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 17/37] KVM: x86: hyper-v: L2 TLB flush Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 18/37] KVM: x86: hyper-v: Introduce fast guest_hv_cpuid_has_l2_tlb_flush() check Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 19/37] x86/hyperv: Fix 'struct hv_enlightened_vmcs' definition Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 20/37] KVM: nVMX: hyper-v: Enable L2 TLB flush Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 21/37] KVM: nSVM: " Vitaly Kuznetsov
2022-05-25 9:01 ` Vitaly Kuznetsov [this message]
2022-05-25 9:01 ` [PATCH v4 23/37] KVM: selftests: Better XMM read/write helpers Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 24/37] KVM: selftests: Move HYPERV_LINUX_OS_ID definition to a common header Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 25/37] KVM: selftests: Move the function doing Hyper-V hypercall " Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 26/37] KVM: selftests: Hyper-V PV IPI selftest Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 27/37] KVM: selftests: Fill in vm->vpages_mapped bitmap in virt_map() too Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 28/37] KVM: selftests: Export vm_vaddr_unused_gap() to make it possible to request unmapped ranges Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 29/37] KVM: selftests: Export _vm_get_page_table_entry() and struct pageTableEntry/pageUpperEntry definitions Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 30/37] KVM: selftests: Hyper-V PV TLB flush selftest Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 31/37] KVM: selftests: Sync 'struct hv_enlightened_vmcs' definition with hyperv-tlfs.h Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 32/37] KVM: selftests: nVMX: Allocate Hyper-V partition assist page Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 33/37] KVM: selftests: nSVM: Allocate Hyper-V partition assist and VP assist pages Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 34/37] KVM: selftests: Sync 'struct hv_vp_assist_page' definition with hyperv-tlfs.h Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 35/37] KVM: selftests: evmcs_test: Introduce L2 TLB flush test Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 36/37] KVM: selftests: Move Hyper-V VP assist page enablement out of evmcs.h Vitaly Kuznetsov
2022-05-25 9:01 ` [PATCH v4 37/37] KVM: selftests: hyperv_svm_test: Introduce L2 TLB flush test Vitaly Kuznetsov
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