61be2998ca
intel_pt_validate_hw_cap() validates whether a given PT capability is supported by the hardware. It checks the PT capability array which reflects the capabilities of the hardware on which the code is executed. For setting up PT for KVM guests this is not correct as the capability array for the guest can be different from the host array. Provide a new function to check against a given capability array. Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Luwei Kang <luwei.kang@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_INTEL_PT_H
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#define _ASM_X86_INTEL_PT_H
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#define PT_CPUID_LEAVES 2
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#define PT_CPUID_REGS_NUM 4 /* number of regsters (eax, ebx, ecx, edx) */
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enum pt_capabilities {
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PT_CAP_max_subleaf = 0,
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PT_CAP_cr3_filtering,
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PT_CAP_psb_cyc,
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PT_CAP_ip_filtering,
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PT_CAP_mtc,
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PT_CAP_ptwrite,
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PT_CAP_power_event_trace,
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PT_CAP_topa_output,
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PT_CAP_topa_multiple_entries,
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PT_CAP_single_range_output,
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PT_CAP_payloads_lip,
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PT_CAP_num_address_ranges,
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PT_CAP_mtc_periods,
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PT_CAP_cycle_thresholds,
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PT_CAP_psb_periods,
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};
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#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
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void cpu_emergency_stop_pt(void);
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extern u32 intel_pt_validate_hw_cap(enum pt_capabilities cap);
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extern u32 intel_pt_validate_cap(u32 *caps, enum pt_capabilities cap);
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#else
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static inline void cpu_emergency_stop_pt(void) {}
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static inline u32 intel_pt_validate_hw_cap(enum pt_capabilities cap) { return 0; }
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static inline u32 intel_pt_validate_cap(u32 *caps, enum pt_capabilities capability) { return 0; }
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#endif
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#endif /* _ASM_X86_INTEL_PT_H */
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