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Hyper-V TLFS specifies this enlightenment as: "NoNonArchitecturalCoreSharing - Indicates that a virtual processor will never share a physical core with another virtual processor, except for virtual processors that are reported as sibling SMT threads. This can be used as an optimization to avoid the performance overhead of STIBP". However, STIBP is not the only implication. It was found that Hyper-V on KVM doesn't pass MD_CLEAR bit to its guests if it doesn't see NoNonArchitecturalCoreSharing bit. KVM reports NoNonArchitecturalCoreSharing in KVM_GET_SUPPORTED_HV_CPUID to indicate that SMT on the host is impossible (not supported of forcefully disabled). Implement NoNonArchitecturalCoreSharing support in QEMU as tristate: 'off' - the feature is disabled (default) 'on' - the feature is enabled. This is only safe if vCPUS are properly pinned and correct topology is exposed. As CPU pinning is done outside of QEMU the enablement decision will be made on a higher level. 'auto' - copy KVM setting. As during live migration SMT settings on the source and destination host may differ this requires us to add a migration blocker. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20191018163908.10246-1-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
165 lines
6.4 KiB
C
165 lines
6.4 KiB
C
/*
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* Definitions for Hyper-V guest/hypervisor interaction - x86-specific part
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*
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* Copyright (c) 2017-2018 Virtuozzo International GmbH.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef TARGET_I386_HYPERV_PROTO_H
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#define TARGET_I386_HYPERV_PROTO_H
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#include "hw/hyperv/hyperv-proto.h"
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#define HV_CPUID_VENDOR_AND_MAX_FUNCTIONS 0x40000000
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#define HV_CPUID_INTERFACE 0x40000001
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#define HV_CPUID_VERSION 0x40000002
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#define HV_CPUID_FEATURES 0x40000003
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#define HV_CPUID_ENLIGHTMENT_INFO 0x40000004
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#define HV_CPUID_IMPLEMENT_LIMITS 0x40000005
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#define HV_CPUID_NESTED_FEATURES 0x4000000A
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#define HV_CPUID_MIN 0x40000005
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#define HV_CPUID_MAX 0x4000ffff
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#define HV_HYPERVISOR_PRESENT_BIT 0x80000000
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/*
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* HV_CPUID_FEATURES.EAX bits
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*/
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#define HV_VP_RUNTIME_AVAILABLE (1u << 0)
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#define HV_TIME_REF_COUNT_AVAILABLE (1u << 1)
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#define HV_SYNIC_AVAILABLE (1u << 2)
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#define HV_SYNTIMERS_AVAILABLE (1u << 3)
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#define HV_APIC_ACCESS_AVAILABLE (1u << 4)
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#define HV_HYPERCALL_AVAILABLE (1u << 5)
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#define HV_VP_INDEX_AVAILABLE (1u << 6)
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#define HV_RESET_AVAILABLE (1u << 7)
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#define HV_REFERENCE_TSC_AVAILABLE (1u << 9)
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#define HV_ACCESS_FREQUENCY_MSRS (1u << 11)
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#define HV_ACCESS_REENLIGHTENMENTS_CONTROL (1u << 13)
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/*
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* HV_CPUID_FEATURES.EDX bits
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*/
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#define HV_MWAIT_AVAILABLE (1u << 0)
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#define HV_GUEST_DEBUGGING_AVAILABLE (1u << 1)
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#define HV_PERF_MONITOR_AVAILABLE (1u << 2)
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#define HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE (1u << 3)
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#define HV_HYPERCALL_PARAMS_XMM_AVAILABLE (1u << 4)
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#define HV_GUEST_IDLE_STATE_AVAILABLE (1u << 5)
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#define HV_FREQUENCY_MSRS_AVAILABLE (1u << 8)
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#define HV_GUEST_CRASH_MSR_AVAILABLE (1u << 10)
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#define HV_STIMER_DIRECT_MODE_AVAILABLE (1u << 19)
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/*
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* HV_CPUID_ENLIGHTMENT_INFO.EAX bits
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*/
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#define HV_AS_SWITCH_RECOMMENDED (1u << 0)
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#define HV_LOCAL_TLB_FLUSH_RECOMMENDED (1u << 1)
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#define HV_REMOTE_TLB_FLUSH_RECOMMENDED (1u << 2)
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#define HV_APIC_ACCESS_RECOMMENDED (1u << 3)
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#define HV_SYSTEM_RESET_RECOMMENDED (1u << 4)
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#define HV_RELAXED_TIMING_RECOMMENDED (1u << 5)
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#define HV_CLUSTER_IPI_RECOMMENDED (1u << 10)
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#define HV_EX_PROCESSOR_MASKS_RECOMMENDED (1u << 11)
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#define HV_ENLIGHTENED_VMCS_RECOMMENDED (1u << 14)
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#define HV_NO_NONARCH_CORESHARING (1u << 18)
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/*
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* Basic virtualized MSRs
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*/
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#define HV_X64_MSR_GUEST_OS_ID 0x40000000
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#define HV_X64_MSR_HYPERCALL 0x40000001
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#define HV_X64_MSR_VP_INDEX 0x40000002
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#define HV_X64_MSR_RESET 0x40000003
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#define HV_X64_MSR_VP_RUNTIME 0x40000010
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#define HV_X64_MSR_TIME_REF_COUNT 0x40000020
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#define HV_X64_MSR_REFERENCE_TSC 0x40000021
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#define HV_X64_MSR_TSC_FREQUENCY 0x40000022
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#define HV_X64_MSR_APIC_FREQUENCY 0x40000023
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/*
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* Virtual APIC MSRs
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*/
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#define HV_X64_MSR_EOI 0x40000070
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#define HV_X64_MSR_ICR 0x40000071
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#define HV_X64_MSR_TPR 0x40000072
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#define HV_X64_MSR_APIC_ASSIST_PAGE 0x40000073
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/*
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* Synthetic interrupt controller MSRs
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*/
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#define HV_X64_MSR_SCONTROL 0x40000080
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#define HV_X64_MSR_SVERSION 0x40000081
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#define HV_X64_MSR_SIEFP 0x40000082
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#define HV_X64_MSR_SIMP 0x40000083
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#define HV_X64_MSR_EOM 0x40000084
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#define HV_X64_MSR_SINT0 0x40000090
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#define HV_X64_MSR_SINT1 0x40000091
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#define HV_X64_MSR_SINT2 0x40000092
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#define HV_X64_MSR_SINT3 0x40000093
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#define HV_X64_MSR_SINT4 0x40000094
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#define HV_X64_MSR_SINT5 0x40000095
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#define HV_X64_MSR_SINT6 0x40000096
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#define HV_X64_MSR_SINT7 0x40000097
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#define HV_X64_MSR_SINT8 0x40000098
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#define HV_X64_MSR_SINT9 0x40000099
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#define HV_X64_MSR_SINT10 0x4000009A
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#define HV_X64_MSR_SINT11 0x4000009B
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#define HV_X64_MSR_SINT12 0x4000009C
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#define HV_X64_MSR_SINT13 0x4000009D
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#define HV_X64_MSR_SINT14 0x4000009E
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#define HV_X64_MSR_SINT15 0x4000009F
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/*
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* Synthetic timer MSRs
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*/
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#define HV_X64_MSR_STIMER0_CONFIG 0x400000B0
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#define HV_X64_MSR_STIMER0_COUNT 0x400000B1
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#define HV_X64_MSR_STIMER1_CONFIG 0x400000B2
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#define HV_X64_MSR_STIMER1_COUNT 0x400000B3
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#define HV_X64_MSR_STIMER2_CONFIG 0x400000B4
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#define HV_X64_MSR_STIMER2_COUNT 0x400000B5
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#define HV_X64_MSR_STIMER3_CONFIG 0x400000B6
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#define HV_X64_MSR_STIMER3_COUNT 0x400000B7
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/*
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* Guest crash notification MSRs
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*/
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#define HV_X64_MSR_CRASH_P0 0x40000100
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#define HV_X64_MSR_CRASH_P1 0x40000101
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#define HV_X64_MSR_CRASH_P2 0x40000102
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#define HV_X64_MSR_CRASH_P3 0x40000103
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#define HV_X64_MSR_CRASH_P4 0x40000104
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#define HV_CRASH_PARAMS (HV_X64_MSR_CRASH_P4 - HV_X64_MSR_CRASH_P0 + 1)
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#define HV_X64_MSR_CRASH_CTL 0x40000105
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#define HV_CRASH_CTL_NOTIFY (1ull << 63)
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/*
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* Reenlightenment notification MSRs
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*/
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#define HV_X64_MSR_REENLIGHTENMENT_CONTROL 0x40000106
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#define HV_X64_MSR_TSC_EMULATION_CONTROL 0x40000107
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#define HV_X64_MSR_TSC_EMULATION_STATUS 0x40000108
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/*
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* Hypercall MSR bits
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*/
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#define HV_HYPERCALL_ENABLE (1u << 0)
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/*
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* Synthetic interrupt controller definitions
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*/
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#define HV_SYNIC_VERSION 1
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#define HV_SYNIC_ENABLE (1u << 0)
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#define HV_SIMP_ENABLE (1u << 0)
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#define HV_SIEFP_ENABLE (1u << 0)
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#define HV_SINT_MASKED (1u << 16)
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#define HV_SINT_AUTO_EOI (1u << 17)
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#define HV_SINT_VECTOR_MASK 0xff
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#define HV_STIMER_COUNT 4
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#endif
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