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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acpi.c (2005B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Intel(R) Trace Hub ACPI driver
      4 *
      5 * Copyright (C) 2017 Intel Corporation.
      6 */
      7
      8#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
      9
     10#include <linux/types.h>
     11#include <linux/module.h>
     12#include <linux/device.h>
     13#include <linux/sysfs.h>
     14#include <linux/platform_device.h>
     15#include <linux/acpi.h>
     16
     17#include "intel_th.h"
     18
     19#define DRIVER_NAME "intel_th_acpi"
     20
     21static const struct intel_th_drvdata intel_th_acpi_pch = {
     22	.host_mode_only	= 1,
     23};
     24
     25static const struct intel_th_drvdata intel_th_acpi_uncore = {
     26	.host_mode_only	= 1,
     27};
     28
     29static const struct acpi_device_id intel_th_acpi_ids[] = {
     30	{ "INTC1000",	(kernel_ulong_t)&intel_th_acpi_uncore },
     31	{ "INTC1001",	(kernel_ulong_t)&intel_th_acpi_pch },
     32	{ "",		0 },
     33};
     34
     35MODULE_DEVICE_TABLE(acpi, intel_th_acpi_ids);
     36
     37static int intel_th_acpi_probe(struct platform_device *pdev)
     38{
     39	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
     40	struct resource resource[TH_MMIO_END];
     41	const struct acpi_device_id *id;
     42	struct intel_th *th;
     43	int i, r;
     44
     45	id = acpi_match_device(intel_th_acpi_ids, &pdev->dev);
     46	if (!id)
     47		return -ENODEV;
     48
     49	for (i = 0, r = 0; i < pdev->num_resources && r < TH_MMIO_END; i++)
     50		if (pdev->resource[i].flags &
     51		    (IORESOURCE_IRQ | IORESOURCE_MEM))
     52			resource[r++] = pdev->resource[i];
     53
     54	th = intel_th_alloc(&pdev->dev, (void *)id->driver_data, resource, r);
     55	if (IS_ERR(th))
     56		return PTR_ERR(th);
     57
     58	adev->driver_data = th;
     59
     60	return 0;
     61}
     62
     63static int intel_th_acpi_remove(struct platform_device *pdev)
     64{
     65	struct intel_th *th = platform_get_drvdata(pdev);
     66
     67	intel_th_free(th);
     68
     69	return 0;
     70}
     71
     72static struct platform_driver intel_th_acpi_driver = {
     73	.probe		= intel_th_acpi_probe,
     74	.remove		= intel_th_acpi_remove,
     75	.driver		= {
     76		.name			= DRIVER_NAME,
     77		.acpi_match_table	= intel_th_acpi_ids,
     78	},
     79};
     80
     81module_platform_driver(intel_th_acpi_driver);
     82
     83MODULE_LICENSE("GPL v2");
     84MODULE_DESCRIPTION("Intel(R) Trace Hub ACPI controller driver");
     85MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");