cpuid.c (073350da0aa2aead9df7927a1c1046ebf5cdd816) cpuid.c (968635abd5f5986f3cb6f15602d365cf1b551c5d)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Kernel-based Virtual Machine driver for Linux
4 * cpuid support routines
5 *
6 * derived from arch/x86/kvm/x86.c
7 *
8 * Copyright 2011 Red Hat, Inc. and/or its affiliates.

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863 entry->ebx = 0;
864 entry->ecx = 0;
865 entry->edx = 0;
866 }
867 break;
868 case 9:
869 break;
870 case 0xa: { /* Architectural Performance Monitoring */
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Kernel-based Virtual Machine driver for Linux
4 * cpuid support routines
5 *
6 * derived from arch/x86/kvm/x86.c
7 *
8 * Copyright 2011 Red Hat, Inc. and/or its affiliates.

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863 entry->ebx = 0;
864 entry->ecx = 0;
865 entry->edx = 0;
866 }
867 break;
868 case 9:
869 break;
870 case 0xa: { /* Architectural Performance Monitoring */
871 struct x86_pmu_capability cap;
872 union cpuid10_eax eax;
873 union cpuid10_edx edx;
874
875 if (!static_cpu_has(X86_FEATURE_ARCH_PERFMON)) {
876 entry->eax = entry->ebx = entry->ecx = entry->edx = 0;
877 break;
878 }
879
871 union cpuid10_eax eax;
872 union cpuid10_edx edx;
873
874 if (!static_cpu_has(X86_FEATURE_ARCH_PERFMON)) {
875 entry->eax = entry->ebx = entry->ecx = entry->edx = 0;
876 break;
877 }
878
880 perf_get_x86_pmu_capability(&cap);
879 eax.split.version_id = kvm_pmu_cap.version;
880 eax.split.num_counters = kvm_pmu_cap.num_counters_gp;
881 eax.split.bit_width = kvm_pmu_cap.bit_width_gp;
882 eax.split.mask_length = kvm_pmu_cap.events_mask_len;
883 edx.split.num_counters_fixed = kvm_pmu_cap.num_counters_fixed;
884 edx.split.bit_width_fixed = kvm_pmu_cap.bit_width_fixed;
881
885
882 /*
883 * The guest architecture pmu is only supported if the architecture
884 * pmu exists on the host and the module parameters allow it.
885 */
886 if (!cap.version || !enable_pmu)
887 memset(&cap, 0, sizeof(cap));
888
889 eax.split.version_id = min(cap.version, 2);
890 eax.split.num_counters = cap.num_counters_gp;
891 eax.split.bit_width = cap.bit_width_gp;
892 eax.split.mask_length = cap.events_mask_len;
893
894 edx.split.num_counters_fixed =
895 min(cap.num_counters_fixed, KVM_PMC_MAX_FIXED);
896 edx.split.bit_width_fixed = cap.bit_width_fixed;
897 if (cap.version)
886 if (kvm_pmu_cap.version)
898 edx.split.anythread_deprecated = 1;
899 edx.split.reserved1 = 0;
900 edx.split.reserved2 = 0;
901
902 entry->eax = eax.full;
887 edx.split.anythread_deprecated = 1;
888 edx.split.reserved1 = 0;
889 edx.split.reserved2 = 0;
890
891 entry->eax = eax.full;
903 entry->ebx = cap.events_mask;
892 entry->ebx = kvm_pmu_cap.events_mask;
904 entry->ecx = 0;
905 entry->edx = edx.full;
906 break;
907 }
908 /*
909 * Per Intel's SDM, the 0x1f is a superset of 0xb,
910 * thus they can be handled by common code.
911 */

--- 546 unchanged lines hidden --- 		893 entry->ecx = 0;
894 entry->edx = edx.full;
895 break;
896 }
897 /*
898 * Per Intel's SDM, the 0x1f is a superset of 0xb,
899 * thus they can be handled by common code.
900 */

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