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pci-v5.17-fixes-1

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Merge tag 'pci-v5.17-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull pci fix from Bjorn Helgaas:

 - Reserve "stolen memory" for integrated Intel GPU, even if it's not
   the first GPU to be enumerated (Lucas De Marchi)

* tag 'pci-v5.17-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  x86/gpu: Reserve stolen memory for first integrated Intel GPU
This commit is contained in:
Linus Torvalds 2022-01-21 09:10:46 +02:00
commit 4141a5e694
1 changed files with 9 additions and 1 deletions
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10
arch/x86/kernel/early-quirks.c
View File

@ -515,6 +515,7 @@ static const struct intel_early_ops gen11_early_ops __initconst = {
.stolen_size = gen9_stolen_size,
};
/* Intel integrated GPUs for which we need to reserve "stolen memory" */
static const struct pci_device_id intel_early_ids[] __initconst = {
INTEL_I830_IDS(&i830_early_ops),
INTEL_I845G_IDS(&i845_early_ops),
@ -592,6 +593,13 @@ static void __init intel_graphics_quirks(int num, int slot, int func)
u16 device;
int i;
/*
* Reserve "stolen memory" for an integrated GPU. If we've already
* found one, there's nothing to do for other (discrete) GPUs.
*/
if (resource_size(&intel_graphics_stolen_res))
return;
device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);
for (i = 0; i < ARRAY_SIZE(intel_early_ids); i++) {
@ -704,7 +712,7 @@ static struct chipset early_qrk[] __initdata = {
{ PCI_VENDOR_ID_INTEL, 0x3406, PCI_CLASS_BRIDGE_HOST,
PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA, PCI_ANY_ID,
QFLAG_APPLY_ONCE, intel_graphics_quirks },
0, intel_graphics_quirks },
/*
* HPET on the current version of the Baytrail platform has accuracy
* problems: it will halt in deep idle state - so we disable it.