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linux/pc: enable IOMMU config for intel fb

Browse Source 
to apply scanout scratch page GTT workaround

drivers/gpu/drm/i915/gt/intel_ggtt.c
 -> gen8_gmch_probe() -> intel_scanout_needs_vtd_wa(i915)

Fixes #4659
This commit is contained in:
Alexander Boettcher 2022-11-01 13:50:21 +01:00 committed by Christian Helmuth
parent bb067f529b
commit 5df68922eb
6 changed files with 68 additions and 2 deletions
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13
repos/pc/src/drivers/framebuffer/intel/pc/dummies.c
View File

@ -577,3 +577,16 @@ int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
{
lx_emul_trace_and_stop(__func__);
}
int pci_enable_msi(struct pci_dev *dev)
{
lx_emul_trace(__func__);
return -ENOSYS;
}
void pci_disable_msi(struct pci_dev *dev)
{
lx_emul_trace(__func__);
}

13
repos/pc/src/drivers/framebuffer/intel/pc/lx_emul.c
View File

@ -17,6 +17,7 @@
#include <linux/dma-fence.h>
#include <linux/fs.h>
#include <linux/intel-iommu.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
@ -31,7 +32,8 @@ struct dma_fence_ops const i915_fence_ops;
pteval_t __default_kernel_pte_mask __read_mostly = ~0;
int acpi_disabled = 0;
int acpi_disabled = 0;
int intel_iommu_gfx_mapped = 0;
void intel_wopcm_init_early(struct intel_wopcm * wopcm)
@ -217,6 +219,15 @@ void intel_gt_init_early(struct intel_gt * gt, struct drm_i915_private * i915)
/* disable panel self refresh (required for FUJITSU S937/S938) */
i915->params.enable_psr = 0;
/*
* Tells driver that IOMMU, e.g. VT-d, is on, so that scratch page
* workaround is applied by Intel display driver:
*
* drivers/gpu/drm/i915/gt/intel_ggtt.c
* -> gen8_gmch_probe() -> intel_scanout_needs_vtd_wa(i915)
*/
intel_iommu_gfx_mapped = 1;
}

1
repos/pc/src/drivers/usb_host/pc/dep.list
View File

@ -29,6 +29,7 @@ drivers/usb/host/xhci-ext-caps.h
drivers/usb/host/xhci-pci.h
drivers/usb/host/xhci-trace.h
drivers/usb/host/xhci.h
include/asm-generic/dma-mapping.h
include/asm-generic/export.h
include/linux/bcd.h
include/linux/extcon.h

23
repos/pc/src/drivers/usb_host/pc/lx_emul.c
View File

@ -85,3 +85,26 @@ int pci_write_config_word(const struct pci_dev * dev,int where,u16 val)
}
lx_emul_trace_and_stop(__func__);
}
int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
unsigned int max_vecs, unsigned int flags,
struct irq_affinity *aff_desc)
{
if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
return 1;
return -ENOSPC;
}
int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
{
if (WARN_ON_ONCE(nr > 0))
return -EINVAL;
return dev->irq;
}
void pci_free_irq_vectors(struct pci_dev *dev)
{
}

15
repos/pc/src/lib/wifi/dummies.c
View File

@ -339,3 +339,18 @@ void synchronize_rcu_expedited(void)
{
lx_emul_trace(__func__);
}
int pci_enable_msi(struct pci_dev *dev)
{
lx_emul_trace(__func__);
return -ENOSYS;
}
int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
int minvec, int maxvec)
{
lx_emul_trace(__func__);
return -ENOSYS;
}

5
repos/pc/src/pc_linux/target.inc
View File

@ -15,7 +15,10 @@ LX_ENABLE += BINFMT_ELF BINFMT_SCRIPT BLK_DEV_INITRD
LX_ENABLE += SERIAL_8250 SERIAL_8250_CONSOLE
# PCI support
LX_ENABLE += PCI
LX_ENABLE += PCI PCI_MSI
# IOMMU support (used by Intel fb to apply scanout scratch page workaround)
LX_ENABLE += IOMMU_SUPPORT INTEL_IOMMU
# ACPI support
LX_ENABLE += ACPI