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Revision f32ab7547161b9fa7ebfbc4f18ea1eb3fd49fe25 authored by =?UTF-8?q?Christian=20K=C3=B6nig?= on 11 January 2018, 13:23:29 UTC, committed by Bjorn Helgaas on 11 January 2018, 17:22:39 UTC 
x86/PCI: Add "pci=big_root_window" option for AMD 64-bit windows
 
Only try to enable a 64-bit window on AMD CPUs when "pci=big_root_window"
is specified.

This taints the kernel because the new 64-bit window uses address space we
don't know anything about, and it may contain unreported devices or memory
that would conflict with the window.

The pci_amd_enable_64bit_bar() quirk that enables the window is specific to
AMD CPUs.  The generic solution would be to have the firmware enable the
window and describe it in the host bridge's _CRS method, or at least
describe it in the _PRS method so the OS would have the option of enabling
it.

Signed-off-by: Christian König <christian.koenig@amd.com>
[bhelgaas: changelog, extend doc, mention taint in dmesg]
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
1 parent 1291a0d
Raw File
module-common.lds 
/*
 * Common module linker script, always used when linking a module.
 * Archs are free to supply their own linker scripts.  ld will
 * combine them automatically.
 */
SECTIONS {
	/DISCARD/ : {
		*(.discard)
		*(.discard.*)
	}

	__ksymtab		0 : { *(SORT(___ksymtab+*)) }
	__ksymtab_gpl		0 : { *(SORT(___ksymtab_gpl+*)) }
	__ksymtab_unused	0 : { *(SORT(___ksymtab_unused+*)) }
	__ksymtab_unused_gpl	0 : { *(SORT(___ksymtab_unused_gpl+*)) }
	__ksymtab_gpl_future	0 : { *(SORT(___ksymtab_gpl_future+*)) }
	__kcrctab		0 : { *(SORT(___kcrctab+*)) }
	__kcrctab_gpl		0 : { *(SORT(___kcrctab_gpl+*)) }
	__kcrctab_unused	0 : { *(SORT(___kcrctab_unused+*)) }
	__kcrctab_unused_gpl	0 : { *(SORT(___kcrctab_unused_gpl+*)) }
	__kcrctab_gpl_future	0 : { *(SORT(___kcrctab_gpl_future+*)) }

	.init_array		0 : ALIGN(8) { *(SORT(.init_array.*)) *(.init_array) }

	__jump_table		0 : ALIGN(8) { KEEP(*(__jump_table)) }
}
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