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- From: Gabor Juhos <juhosg@openwrt.org>
- Subject: debloat: add kernel config option to disabling common PCI quirks
- Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
- ---
- drivers/pci/Kconfig | 6 ++++++
- drivers/pci/quirks.c | 6 ++++++
- 2 files changed, 12 insertions(+)
- --- a/drivers/pci/Kconfig
- +++ b/drivers/pci/Kconfig
- @@ -71,6 +71,12 @@ 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 HT_IRQ
- bool "Interrupts on hypertransport devices"
- default y
- --- a/drivers/pci/quirks.c
- +++ b/drivers/pci/quirks.c
- @@ -44,6 +44,7 @@ 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
- * Mark this device with a broken_parity_status, to allow
- * PCI scanning code to "skip" this now blacklisted device.
- @@ -3095,6 +3096,7 @@ 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
- @@ -3151,6 +3153,8 @@ static void fixup_debug_report(struct pc
- }
- }
-
- +#ifndef CONFIG_PCI_DISABLE_COMMON_QUIRKS
- +
- /*
- * Some BIOS implementations leave the Intel GPU interrupts enabled,
- * even though no one is handling them (f.e. i915 driver is never loaded).
- @@ -3189,6 +3193,8 @@ 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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