linux.git/include/asm-x86/system.h, branch v2.6.25

x86: remove final FASTCALL() uses

2008-02-04T15:48:03+00:00

A few snuck back in to x86.

Signed-off-by: Harvey Harrison 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: reintroduce volatile keyword in prototype to clflush()

2008-02-04T15:48:00+00:00

The volatile keyword was removed from the clflush() prototype
in commit e34907ae180f4fe6c28bb4516c679c2f81b0c9ed; the comment there
states:

    x86: remove volatile keyword from clflush.

    the p parameter is an explicit memory reference, and is
    enough to prevent gcc to being nasty here. The volatile
    seems completely not needed.

This reflects incorrect understanding of the function of the volatile
keyword there.  The purpose of the volatile keyword is informing gcc
that it is safe to pass a volatile pointer to this function.

Signed-off-by: H. Peter Anvin 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: use _ASM_EXTABLE macro in include/asm-x86/system.h

2008-02-04T15:47:58+00:00

Use the _ASM_EXTABLE macro from , instead of open-coding
__ex_table entires in include/asm-x86/system.h.

Signed-off-by: H. Peter Anvin 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: provide read and write cr8 paravirt hooks

2008-01-30T12:33:19+00:00

Since the cr8 manipulation functions ended up staying in the tree,
they can't be defined just when PARAVIRT is off: In this patch,
those functions are defined for the PARAVIRT case too.

[ mingo@elte.hu: fixes ]

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: introduce rdtsc_barrier()

2008-01-30T12:32:38+00:00

rdtsc_barrier() is a new barrier primitive that stops RDTSC speculation
to avoid races with timer interrupts on other CPUs.

It expands either to LFENCE (for Intel CPUs) or MFENCE (for
AMD CPUs) which stops RDTSC on all currently known microarchitectures
that implement SSE. On CPUs without SSE there is generally no RDTSC
speculation.

[ mingo@elte.hu: renamed it to rdtsc_barrier() and made it x86-only ]

Signed-off-by: Andi Kleen 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: also define AT_VECTOR_SIZE_ARCH

2008-01-30T12:31:24+00:00

The patch introducing this left out x86-64, despite it also having
extra entries.

[ mingo@elte.hu: re-merged this to after the unification patches. ]

Signed-off-by: Jan Beulich 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: unify system.h

2008-01-30T12:31:08+00:00

This patch finishes the unification of system.h file.
i386 needs a constant to be defined, and it is defined inside an ifdef.

Other than that, pretty much nothing but includes are left in the arch
specific headers, and they are deleted.

[ mingo@elte.hu: 64-bit needs the cr8 access inlines. ]

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: move switch_to macro to system.h

2008-01-30T12:31:08+00:00

This patch moves the switch_to() macro to system.h

As those macros are fundamentally different between i386 and x86_64,
they are enclosed around an ifdef.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: unify smp parts of system.h

2008-01-30T12:31:08+00:00

The memory barrier parts of system.h are not very different between
i386 and x86_64, the main difference being the availability of
instructions, which we handle with the use of ifdefs.

They are consolidated in system.h file, and then removed from
the arch-specific headers.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: unify paravirt parts of system.h

2008-01-30T12:31:08+00:00

This patch moves the i386 control registers manipulation functions,
wbinvd, and clts functions to system.h. They are essentially the same
as in x86_64.

With this, system.h paravirt comes for free in x86_64.

[ mingo@elte.hu: reintroduced the cr8 bits - needed for resume images ]

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner