linux.git/arch/x86/kernel/smpcommon.c, branch master

x86: initialize per-cpu GDT segment in per-cpu setup

2009-01-27T03:56:48+00:00

Impact: cleanup

Rename init_gdt() to setup_percpu_segment(), and move it to
setup_percpu.c.

Signed-off-by: Brian Gerst 
Signed-off-by: Tejun Heo

x86: move this_cpu_offset

2009-01-27T03:56:48+00:00

Impact: Small cleanup

Define BOOT_PERCPU_OFFSET and use it for this_cpu_offset and
__per_cpu_offset initializers.

Signed-off-by: Brian Gerst 
Signed-off-by: Tejun Heo

x86-64: Move cpu number from PDA to per-cpu and consolidate with 32-bit.

2009-01-18T15:38:58+00:00

tj: moved cpu_number definition out of CONFIG_HAVE_SETUP_PER_CPU_AREA
    for voyager.

Signed-off-by: Brian Gerst 
Signed-off-by: Tejun Heo

x86_64: initialize this_cpu_off to __per_cpu_load

2009-01-16T13:20:58+00:00

On x86_64, if get_per_cpu_var() is used before per cpu area is setup
(if lockdep is turned on, it happens), it needs this_cpu_off to point
to __per_cpu_load.  Initialize accordingly.

Signed-off-by: Tejun Heo

x86: merge 64 and 32 SMP percpu handling

2009-01-16T13:19:58+00:00

Now that pda is allocated as part of percpu, percpu doesn't need to be
accessed through pda.  Unify x86_64 SMP percpu access with x86_32 SMP
one.  Other than the segment register, operand size and the base of
percpu symbols, they behave identical now.

This patch replaces now unnecessary pda->data_offset with a dummy
field which is necessary to keep stack_canary at its place.  This
patch also moves per_cpu_offset initialization out of init_gdt() into
setup_per_cpu_areas().  Note that this change also necessitates
explicit per_cpu_offset initializations in voyager_smp.c.

With this change, x86_OP_percpu()'s are as efficient on x86_64 as on
x86_32 and also x86_64 can use assembly PER_CPU macros.

Signed-off-by: Tejun Heo 
Signed-off-by: Ingo Molnar

x86: change init_gdt to update the gdt via write_gdt, rather than a direct write.

2008-08-15T17:16:05+00:00

By writing directly, a memory access violation can occur whilst
hotplugging a CPU if the entry was previously marked read-only.

Signed-off-by: Alex Nixon 
Cc: Jeremy Fitzhardinge 
Signed-off-by: Ingo Molnar

x86: convert to generic helpers for IPI function calls

2008-06-26T09:21:54+00:00

This converts x86, x86-64, and xen to use the new helpers for
smp_call_function() and friends, and adds support for
smp_call_function_single().

Acked-by: Ingo Molnar 
Acked-by: Jeremy Fitzhardinge 
Signed-off-by: Jens Axboe

x86: create smpcommon.c

2008-04-17T15:40:55+00:00

This patch creates smpcommon.c with functions that are
equal between architectures. The i386-only init_gdt
is ifdef'd.

Note that smpcommon.o figures twice in the Makefile:
this is because sub-architectures like voyager that does
not use the normal smp_$(BITS) files also have to access them

Signed-off-by: Glauber Costa 
Signed-off-by: Ingo Molnar