| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // N.B. This is ideally temporary. It is used by Intel PT support, and is a |
| // stopgap until "resources" can be used to read/write x86 MSRs. |
| // "mtrace" == "zircon trace": the idea being to be a generalization of |
| // ktrace. It's all temporary, but there may be other uses before the stopgap |
| // is no longer necessary. |
| |
| #pragma once |
| |
| __BEGIN_CDECLS |
| |
| // mtrace_control() can operate on a range of features, for now just IPT. |
| // It's an abstraction that doesn't mean much, and will likely be replaced |
| // before it's useful; it's here in the interests of hackability in the |
| // interim. |
| #define MTRACE_KIND_IPT 0 |
| |
| // Actions for perf_control |
| |
| // Set the trace mode. |
| #define MTRACE_IPT_SET_MODE 0 |
| |
| // Stage all trace buffer data for a CPU. |
| #define MTRACE_IPT_STAGE_CPU_DATA 1 |
| |
| // Fetch trace buffer data (MSRs) for a CPU. |
| #define MTRACE_IPT_GET_CPU_DATA 2 |
| |
| // CPU-based tracing commands |
| #define MTRACE_IPT_CPU_MODE_ALLOC 3 |
| #define MTRACE_IPT_CPU_MODE_START 4 |
| #define MTRACE_IPT_CPU_MODE_STOP 5 |
| #define MTRACE_IPT_CPU_MODE_FREE 6 |
| |
| // Encode/decode options values for mtrace_control(). |
| // At present we just encode the cpu number here. |
| // We only support 32 cpus at the moment, the extra bit is for magic values. |
| #define MTRACE_IPT_OPTIONS_CPU_MASK 0x3f |
| #define MTRACE_IPT_OPTIONS(cpu) (((cpu) & MTRACE_IPT_OPTIONS_CPU_MASK) + 0) |
| |
| #define MTRACE_IPT_ALL_CPUS 32 |
| |
| #define MTRACE_IPT_OPTIONS_CPU(options) ((options) & MTRACE_IPT_OPTIONS_CPU_MASK) |
| |
| __END_CDECLS |
