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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mock_acpi.c (829B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/* Copyright(c) 2021 Intel Corporation. All rights reserved. */
      3
      4#include <linux/platform_device.h>
      5#include <linux/device.h>
      6#include <linux/acpi.h>
      7#include <cxl.h>
      8#include "test/mock.h"
      9
     10struct acpi_device *to_cxl_host_bridge(struct device *host, struct device *dev)
     11{
     12	int index;
     13	struct acpi_device *adev, *found = NULL;
     14	struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
     15
     16	if (ops && ops->is_mock_bridge(dev)) {
     17		found = ACPI_COMPANION(dev);
     18		goto out;
     19	}
     20
     21	if (dev->bus == &platform_bus_type)
     22		goto out;
     23
     24	adev = to_acpi_device(dev);
     25	if (!acpi_pci_find_root(adev->handle))
     26		goto out;
     27
     28	if (strcmp(acpi_device_hid(adev), "ACPI0016") == 0) {
     29		found = adev;
     30		dev_dbg(host, "found host bridge %s\n", dev_name(&adev->dev));
     31	}
     32out:
     33	put_cxl_mock_ops(index);
     34	return found;
     35}