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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cfdbgl.c (1496B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright (C) ST-Ericsson AB 2010
      4 * Author:	Sjur Brendeland
      5 */
      6
      7#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
      8
      9#include <linux/stddef.h>
     10#include <linux/slab.h>
     11#include <net/caif/caif_layer.h>
     12#include <net/caif/cfsrvl.h>
     13#include <net/caif/cfpkt.h>
     14
     15#define container_obj(layr) ((struct cfsrvl *) layr)
     16
     17static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt);
     18static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt);
     19
     20struct cflayer *cfdbgl_create(u8 channel_id, struct dev_info *dev_info)
     21{
     22	struct cfsrvl *dbg = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
     23	if (!dbg)
     24		return NULL;
     25	caif_assert(offsetof(struct cfsrvl, layer) == 0);
     26	cfsrvl_init(dbg, channel_id, dev_info, false);
     27	dbg->layer.receive = cfdbgl_receive;
     28	dbg->layer.transmit = cfdbgl_transmit;
     29	snprintf(dbg->layer.name, CAIF_LAYER_NAME_SZ, "dbg%d", channel_id);
     30	return &dbg->layer;
     31}
     32
     33static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt)
     34{
     35	return layr->up->receive(layr->up, pkt);
     36}
     37
     38static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt)
     39{
     40	struct cfsrvl *service = container_obj(layr);
     41	struct caif_payload_info *info;
     42	int ret;
     43
     44	if (!cfsrvl_ready(service, &ret)) {
     45		cfpkt_destroy(pkt);
     46		return ret;
     47	}
     48
     49	/* Add info for MUX-layer to route the packet out */
     50	info = cfpkt_info(pkt);
     51	info->channel_id = service->layer.id;
     52	info->dev_info = &service->dev_info;
     53
     54	return layr->dn->transmit(layr->dn, pkt);
     55}