cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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iosm_ipc_trace.h (1721B)

      1/* SPDX-License-Identifier: GPL-2.0-only
      2 *
      3 * Copyright (C) 2020-2021 Intel Corporation.
      4 */
      5
      6#ifndef IOSM_IPC_TRACE_H
      7#define IOSM_IPC_TRACE_H
      8
      9#include <linux/debugfs.h>
     10#include <linux/relay.h>
     11
     12#include "iosm_ipc_chnl_cfg.h"
     13#include "iosm_ipc_imem_ops.h"
     14
     15/**
     16 * enum trace_ctrl_mode - State of trace channel
     17 * @TRACE_DISABLE:	mode for disable trace
     18 * @TRACE_ENABLE:	mode for enable trace
     19 */
     20enum trace_ctrl_mode {
     21	TRACE_DISABLE = 0,
     22	TRACE_ENABLE,
     23};
     24
     25/**
     26 * struct iosm_trace - Struct for trace interface
     27 * @ipc_rchan:		Pointer to relay channel
     28 * @ctrl_file:		Pointer to trace control file
     29 * @ipc_imem:		Imem instance
     30 * @dev:		Pointer to device struct
     31 * @channel:		Channel instance
     32 * @chl_id:		Channel Indentifier
     33 * @trc_mutex:		Mutex used for read and write mode
     34 * @mode:		Mode for enable and disable trace
     35 */
     36
     37struct iosm_trace {
     38	struct rchan *ipc_rchan;
     39	struct dentry *ctrl_file;
     40	struct iosm_imem *ipc_imem;
     41	struct device *dev;
     42	struct ipc_mem_channel *channel;
     43	enum ipc_channel_id chl_id;
     44	struct mutex trc_mutex;	/* Mutex used for read and write mode */
     45	enum trace_ctrl_mode mode;
     46};
     47
     48#ifdef CONFIG_WWAN_DEBUGFS
     49
     50static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
     51{
     52	return ipc_mem->trace && ipc_mem->trace->chl_id == chl_id;
     53}
     54
     55struct iosm_trace *ipc_trace_init(struct iosm_imem *ipc_imem);
     56void ipc_trace_deinit(struct iosm_trace *ipc_trace);
     57void ipc_trace_port_rx(struct iosm_imem *ipc_imem, struct sk_buff *skb);
     58
     59#else
     60
     61static inline bool ipc_is_trace_channel(struct iosm_imem *ipc_mem, u16 chl_id)
     62{
     63	return false;
     64}
     65
     66static inline void ipc_trace_port_rx(struct iosm_imem *ipc_imem,
     67				     struct sk_buff *skb)
     68{
     69	dev_kfree_skb(skb);
     70}
     71
     72#endif
     73
     74#endif