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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fbdev.c (874B)

      1/*
      2 * Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com>
      3 *
      4 * This file is subject to the terms and conditions of the GNU General Public
      5 * License.  See the file COPYING in the main directory of this archive
      6 * for more details.
      7 *
      8 */
      9#include <linux/fb.h>
     10#include <linux/pci.h>
     11#include <linux/module.h>
     12#include <linux/vgaarb.h>
     13
     14int fb_is_primary_device(struct fb_info *info)
     15{
     16	struct device *device = info->device;
     17	struct pci_dev *default_device = vga_default_device();
     18	struct pci_dev *pci_dev;
     19	struct resource *res;
     20
     21	if (!device || !dev_is_pci(device))
     22		return 0;
     23
     24	pci_dev = to_pci_dev(device);
     25
     26	if (default_device) {
     27		if (pci_dev == default_device)
     28			return 1;
     29		return 0;
     30	}
     31
     32	res = pci_dev->resource + PCI_ROM_RESOURCE;
     33
     34	if (res->flags & IORESOURCE_ROM_SHADOW)
     35		return 1;
     36
     37	return 0;
     38}
     39EXPORT_SYMBOL(fb_is_primary_device);
     40MODULE_LICENSE("GPL");