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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vbios_quirk.c (719B)

      1// SPDX-License-Identifier: GPL-2.0+
      2
      3#include <linux/pci.h>
      4#include <loongson.h>
      5
      6static void pci_fixup_video(struct pci_dev *pdev)
      7{
      8	struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
      9
     10	if (res->start)
     11		return;
     12
     13	if (!loongson_sysconf.vgabios_addr)
     14		return;
     15
     16	pci_disable_rom(pdev);
     17	if (res->parent)
     18		release_resource(res);
     19
     20	res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr);
     21	res->end   = res->start + 256*1024 - 1;
     22	res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
     23		     IORESOURCE_PCI_FIXED;
     24
     25	dev_info(&pdev->dev, "Video device with shadowed ROM at %pR\n", res);
     26}
     27DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_ATI, 0x9615,
     28			       PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);