Matt Fleming 5a17dae422 efi: Add efi= parameter parsing to the EFI boot stub ... We need a way to customize the behaviour of the EFI boot stub, in particular, we need a way to disable the "chunking" workaround, used when reading files from the EFI System Partition. One of my machines doesn't cope well when reading files in 1MB chunks to a buffer above the 4GB mark - it appears that the "chunking" bug workaround triggers another firmware bug. This was only discovered with commit 4bf7111f50 ("x86/efi: Support initrd loaded above 4G"), and that commit is perfectly valid. The symptom I observed was a corrupt initrd rather than any kind of crash. efi= is now used to specify EFI parameters in two very different execution environments, the EFI boot stub and during kernel boot. There is also a slight performance optimization by enabling efi=nochunk, but that's offset by the fact that you're more likely to run into firmware issues, at least on x86. This is the rationale behind leaving the workaround enabled by default. Also provide some documentation for EFI_READ_CHUNK_SIZE and why we're using the current value of 1MB. Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Roy Franz <roy.franz@linaro.org> Cc: Maarten Lankhorst <m.b.lankhorst@gmail.com> Cc: Leif Lindholm <leif.lindholm@linaro.org> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Matt Fleming <matt.fleming@intel.com>		2014-10-03 18:40:57 +01:00
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ce4100	x86: ce4100, irq: Do not set legacy_pic to null_legacy_pic	2014-06-21 23:05:42 +02:00
efi	efi: Add efi= parameter parsing to the EFI boot stub	2014-10-03 18:40:57 +01:00
geode	x86/geode: Fix incorrect placement of __initdata tag	2013-10-01 13:21:27 +02:00
goldfish	goldfish: platform device for x86	2013-01-21 12:09:19 -08:00
intel-mid	x86: intel-mid: Use the new io_apic interfaces	2014-07-14 20:17:09 +02:00
iris	x86: Delete non-required instances of include <linux/init.h>	2014-01-06 21:25:18 -08:00
olpc	asmlinkage, x86: Add explicit __visible to arch/x86/*	2014-05-05 16:07:44 -07:00
scx200	X86: drivers: remove __dev* attributes.	2013-01-03 15:57:04 -08:00
sfi	x86, irq, SFI: Use common irqdomain map interface to program IOAPIC pins	2014-06-21 23:05:43 +02:00
ts5500	x86/platform/ts5500: Add support for TS-5400 boards	2014-07-16 21:17:42 +02:00
uv	arch/x86: replace strict_strto calls	2014-08-08 15:57:28 -07:00
Makefile	x86, platforms: Remove SGI Visual Workstation	2014-02-27 08:07:39 -08:00