Linus Torvalds 8ccb3dcd1f x86: Fix booting with "no387 nofxsr" ...

Jesper Juhl reported that testing the software math-emulation by forcing
"no387" doesn't work on modern CPU's.

The reason was two-fold:
 - you also need to pass in "nofxsr" to make sure that we not only don't
   touch the old i387 legacy hardware, it also needs to disable the
   modern XMM/FXSR sequences
 - "nofxsr" didn't actually clear the capability bits immediately,
   leaving the early boot sequence still using FXSR until we got to
   the identify_cpu() stage.

This fixes the "nofxsr" flag to take effect immediately on the boot CPU.

Debugging by Randy Dunlap

Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Jesper Juhl <jesper.juhl@gmail.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-10-03 09:47:14 -07:00

..

boot

[PATCH] Some config.h removals

2006-10-01 00:39:34 -07:00

crypto

[CRYPTO] api: Get rid of flags argument to setkey

2006-09-21 11:41:02 +10:00

kernel

x86: Fix booting with "no387 nofxsr"

2006-10-03 09:47:14 -07:00

lib

[PATCH] Some config.h removals

2006-10-01 00:39:34 -07:00

mach-default

[PATCH] irq-flags: i386: Use the new IRQF_ constants

2006-07-02 13:58:47 -07:00

mach-es7000

[PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386)

2006-03-23 07:38:04 -08:00

mach-generic

[PATCH] i386: Replace i386 open-coded cmdline parsing with

2006-09-26 10:52:32 +02:00

mach-visws

[PATCH] irq-flags: i386: Use the new IRQF_ constants

2006-07-02 13:58:47 -07:00

mach-voyager

[PATCH] stack overflow safe kdump: safe_smp_processor_id(): voyager

2006-10-01 00:39:31 -07:00

math-emu

[PATCH] i386: inline assembler: cleanup and encapsulate descriptor and task register management

2005-09-05 00:06:11 -07:00

mm

[PATCH] paravirt: update pte hook

2006-10-01 00:39:34 -07:00

oprofile

[PATCH] oprofile: ppro: need to enable/disable all the counters

2006-09-29 09:18:11 -07:00

pci

[PATCH] arch/i386/pci/mmconfig.c tweaks

2006-10-01 00:39:18 -07:00

power

[PATCH] Change the name of pagedir_nosave

2006-09-26 08:49:01 -07:00

defconfig

[PATCH] i386: Update defconfig

2006-09-30 01:47:55 +02:00

Kconfig

[PATCH] Kprobes: Make kprobe modules more portable

2006-10-02 07:57:16 -07:00

Kconfig.cpu

i386: Trivial typo fixes

2006-06-26 18:47:15 +02:00

Kconfig.debug

[PATCH] lockdep: irqtrace subsystem, i386 support

2006-07-03 15:27:03 -07:00

Makefile

[PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder

2006-09-26 10:52:41 +02:00

Makefile.cpu

[PATCH] x86-64: Use -mtune=generic for generic kernels

2006-03-25 09:10:52 -08:00