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- From: Gabor Juhos <[email protected]>
- Subject: debloat: add kernel config option to disabling common PCI quirks
- Signed-off-by: Gabor Juhos <[email protected]>
- ---
- drivers/pci/Kconfig | 6 ++++++
- drivers/pci/quirks.c | 6 ++++++
- 2 files changed, 12 insertions(+)
- --- a/drivers/pci/Kconfig
- +++ b/drivers/pci/Kconfig
- @@ -113,6 +113,13 @@ config XEN_PCIDEV_FRONTEND
- The PCI device frontend driver allows the kernel to import arbitrary
- PCI devices from a PCI backend to support PCI driver domains.
-
- +config PCI_DISABLE_COMMON_QUIRKS
- + bool "PCI disable common quirks"
- + depends on PCI
- + help
- + If you don't know what to do here, say N.
- +
- +
- config PCI_ATS
- bool
-
- --- a/drivers/pci/quirks.c
- +++ b/drivers/pci/quirks.c
- @@ -300,6 +300,7 @@ static void quirk_mmio_always_on(struct
- DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_ANY_ID, PCI_ANY_ID,
- PCI_CLASS_BRIDGE_HOST, 8, quirk_mmio_always_on);
-
- +#ifndef CONFIG_PCI_DISABLE_COMMON_QUIRKS
- /*
- * The Mellanox Tavor device gives false positive parity errors. Disable
- * parity error reporting.
- @@ -3488,6 +3489,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_I
- DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f9, quirk_intel_mc_errata);
- DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65fa, quirk_intel_mc_errata);
-
- +#endif /* !CONFIG_PCI_DISABLE_COMMON_QUIRKS */
- +
- /*
- * Ivytown NTB BAR sizes are misreported by the hardware due to an erratum.
- * To work around this, query the size it should be configured to by the
- @@ -3513,6 +3516,8 @@ static void quirk_intel_ntb(struct pci_d
- DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e08, quirk_intel_ntb);
- DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e0d, quirk_intel_ntb);
-
- +#ifndef CONFIG_PCI_DISABLE_COMMON_QUIRKS
- +
- /*
- * Some BIOS implementations leave the Intel GPU interrupts enabled, even
- * though no one is handling them (e.g., if the i915 driver is never
- @@ -3551,6 +3556,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
- DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
- DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0152, disable_igfx_irq);
-
- +#endif /* !CONFIG_PCI_DISABLE_COMMON_QUIRKS */
- +
- /*
- * PCI devices which are on Intel chips can skip the 10ms delay
- * before entering D3 mode.
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