linux-toradex.git/include/asm-i386/alternative.h, branch v2.6.22.6

i386: work around miscompilation of alternatives code

2007-05-11T15:29:32+00:00

A recent change makes my Dell 1501 hang on boot.  It's an AMD MK-36.  I use
an x86_64 kernel.  It is 100% reproducible.

I debugged this problem a bit and my compiler[1]interprets the =A constraint
as %rax instead of %edx:%eax on x86_64 which causes the problem.  The appended
patch provides a workaround for this and fixed the hang on my machine.

[1] gcc version 4.1.3 20070429 (prerelease) (Debian 4.1.2-5)

Signed-off-by: Joerg Roedel 
Cc: Andi Kleen 
Cc: Benny Halevy 
Cc: Pete Zaitcev 
Cc: "Joerg Roedel" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] i386: Implement alternative_io for i386

2007-05-02T17:27:20+00:00

Ported from x86-64.

Signed-off-by: Andi Kleen

[PATCH] x86: PARAVIRT: Jeremy Fitzhardinge

2007-05-02T17:27:16+00:00

The other symbols used to delineate the alt-instructions sections have the
form __foo/__foo_end.  Rename parainstructions to match.

Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Andi Kleen 
Cc: Andi Kleen 
Cc: Rusty Russell 
Signed-off-by: Andrew Morton

[PATCH] i386: PARAVIRT: rename struct paravirt_patch to paravirt_patch_site for clarity

2007-05-02T17:27:14+00:00

Rename struct paravirt_patch to paravirt_patch_site, so that it
clearly refers to a callsite, and not the patch which may be applied
to that callsite.

Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Andi Kleen 
Cc: Rusty Russell 
Cc: Zachary Amsden

[PATCH] i386: Remove smp_alt_instructions

2007-05-02T17:27:13+00:00

The .smp_altinstructions section and its corresponding symbols are
completely unused, so remove them.

Also, remove stray #ifdef __KENREL__ in asm-i386/alternative.h

Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Andi Kleen 
Cc: Andi Kleen

[PATCH] i386: Clean up asm-i386/bugs.h

2007-05-02T17:27:12+00:00

Most of asm-i386/bugs.h is code which should be in a C file, so put it there.

Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Andi Kleen 
Cc: Linus Torvalds

[PATCH] paravirt: Patch inline replacements for paravirt intercepts

2006-12-07T01:14:08+00:00

It turns out that the most called ops, by several orders of magnitude,
are the interrupt manipulation ops.  These are obvious candidates for
patching, so mark them up and create infrastructure for it.

The method used is that the ops structure has a patch function, which
is called for each place which needs to be patched: this returns a
number of instructions (the rest are NOP-padded).

Usually we can spare a register (%eax) for the binary patched code to
use, but in a couple of critical places in entry.S we can't: we make
the clobbers explicit at the call site, and manually clobber the
allowed registers in debug mode as an extra check.

And:

Don't abuse CONFIG_DEBUG_KERNEL, add CONFIG_DEBUG_PARAVIRT.

And:

AK:  Fix warnings in x86-64 alternative.c build

And:

AK: Fix compilation with defconfig

And:

^From: Andrew Morton 

Some binutlises still like to emit references to __stop_parainstructions and
__start_parainstructions.

And:

AK: Fix warnings about unused variables when PARAVIRT is disabled.

Signed-off-by: Rusty Russell 
Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Chris Wright 
Signed-off-by: Zachary Amsden 
Signed-off-by: Andi Kleen 
Signed-off-by: Andrew Morton

[PATCH] i386: Remove alternative_smp

2006-08-30T23:05:15+00:00

The .fill causes miscompilations with some binutils version.

Instead just patch the lock prefix in the lock constructs. That is the
majority of the cost and should be good enough.

Cc: Gerd Hoffmann 
Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] x86: fix x86 cpuid keys used in alternative_smp()

2006-08-30T23:05:15+00:00

By hard-coding the cpuid keys for alternative_smp() rather than using
the symbolic constant it turned out that incorrect values were used on
both i386 (0x68 instead of 0x69) and x86-64 (0x66 instead of 0x68).

Signed-off-by: Jan Beulich 
Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] SMP alternatives: skip with UP kernels

2006-07-01T16:56:02+00:00

Hide the magic in alternative.h and provide some dummy inline functions
for the UP case (gcc should manage to optimize away these calls).  No
changes in module.c.

Cc: Dave Jones 
Cc: Andi Kleen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds