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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iwl-devtrace.h (2766B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/******************************************************************************
      3 *
      4 * Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
      5 * Copyright(C) 2016        Intel Deutschland GmbH
      6 * Copyright(c) 2018        Intel Corporation
      7 *****************************************************************************/
      8
      9#ifndef __IWLWIFI_DEVICE_TRACE
     10#include <linux/skbuff.h>
     11#include <linux/ieee80211.h>
     12#include <net/cfg80211.h>
     13#include "iwl-trans.h"
     14#if !defined(__IWLWIFI_DEVICE_TRACE)
     15static inline bool iwl_trace_data(struct sk_buff *skb)
     16{
     17	struct ieee80211_hdr *hdr = (void *)skb->data;
     18	__le16 fc = hdr->frame_control;
     19	int offs = 24; /* start with normal header length */
     20
     21	if (!ieee80211_is_data(fc))
     22		return false;
     23
     24	/* Try to determine if the frame is EAPOL. This might have false
     25	 * positives (if there's no RFC 1042 header and we compare to some
     26	 * payload instead) but since we're only doing tracing that's not
     27	 * a problem.
     28	 */
     29
     30	if (ieee80211_has_a4(fc))
     31		offs += 6;
     32	if (ieee80211_is_data_qos(fc))
     33		offs += 2;
     34	/* don't account for crypto - these are unencrypted */
     35
     36	/* also account for the RFC 1042 header, of course */
     37	offs += 6;
     38
     39	return skb->len <= offs + 2 ||
     40		*(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE);
     41}
     42
     43static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
     44				      void *rxbuf, size_t len,
     45				      size_t *out_hdr_offset)
     46{
     47	struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32));
     48	struct ieee80211_hdr *hdr = NULL;
     49	size_t hdr_offset;
     50
     51	if (cmd->cmd != trans->rx_mpdu_cmd)
     52		return len;
     53
     54	hdr_offset = sizeof(struct iwl_cmd_header) +
     55		     trans->rx_mpdu_cmd_hdr_size;
     56
     57	if (out_hdr_offset)
     58		*out_hdr_offset = hdr_offset;
     59
     60	hdr = (void *)((u8 *)cmd + hdr_offset);
     61	if (!ieee80211_is_data(hdr->frame_control))
     62		return len;
     63	/* maybe try to identify EAPOL frames? */
     64	return sizeof(__le32) + sizeof(*cmd) + trans->rx_mpdu_cmd_hdr_size +
     65		ieee80211_hdrlen(hdr->frame_control);
     66}
     67#endif
     68
     69#define __IWLWIFI_DEVICE_TRACE
     70
     71#include <linux/tracepoint.h>
     72#include <linux/device.h>
     73
     74
     75#if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
     76#undef TRACE_EVENT
     77#define TRACE_EVENT(name, proto, ...) \
     78static inline void trace_ ## name(proto) {}
     79#undef DECLARE_EVENT_CLASS
     80#define DECLARE_EVENT_CLASS(...)
     81#undef DEFINE_EVENT
     82#define DEFINE_EVENT(evt_class, name, proto, ...) \
     83static inline void trace_ ## name(proto) {}
     84#endif
     85
     86#define DEV_ENTRY	__string(dev, dev_name(dev))
     87#define DEV_ASSIGN	__assign_str(dev, dev_name(dev))
     88
     89#include "iwl-devtrace-io.h"
     90#include "iwl-devtrace-ucode.h"
     91#include "iwl-devtrace-msg.h"
     92#include "iwl-devtrace-data.h"
     93#include "iwl-devtrace-iwlwifi.h"
     94
     95#endif /* __IWLWIFI_DEVICE_TRACE */