Commit Graph

1066 Commits

Author SHA1 Message Date
Roland McGrath
a31f8dd7ee x86: ptrace vs -ENOSYS
When we're stopped at syscall entry tracing, ptrace can change the %rax
value from -ENOSYS to something else.  If no system call is actually made
because the syscall number (now in orig_rax) is bad, then we now always
reset %rax to -ENOSYS again.

This changes it to leave the return value alone after entry tracing.
That way, the %rax value set by ptrace is there to be seen in user mode
(or in syscall exit tracing).  This is consistent with what the 32-bit
kernel does.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:13 +02:00
Adrian Bunk
ede1389f8a x86: remove the write-only timer_uses_ioapic_pin_0
This patch removes the write-only timer_uses_ioapic_pin_0
(gsi can't be <= 15 in the line of it's fake usage in mpparse_32.c).

Spotted by the GNU C compiler.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:13 +02:00
Ingo Molnar
6542fe80e6 x86: vsmp fix x86 vsmp fix is vsmp box cleanup
code got a bit smaller:

arch/x86/kernel/vsmp_64.o:

   text	   data	    bss	    dec	    hex	filename
    205	      4	      0	    209	     d1	vsmp_64.o.before
    181	      4	      0	    185	     b9	vsmp_64.o.after

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Ravikiran G Thirumalai
1cb68487f5 x86: apic_is_clustered_box to indicate unsynched TSC's on multiboard vSMP systems
Indicate TSCs are unreliable as time sources if the platform is
a multi chassi ScaleMP vSMPowered machine.

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Ravikiran G Thirumalai
9f6d8552a9 x86: vSMP: use pvops only if platform has the capability to support it
Re-arrange set_vsmp_pv_ops so that pv_ops are set only if
the platform has capability to support paravirtualized irq ops

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Ravikiran G Thirumalai
aa7d8e25ec x86: fix build breakage when PCI is define and PARAVIRT is not
- Fix the the build breakage when PARAVIRT is defined
  but PCI is not
  This fixes problem reported at:
	http://marc.info/?l=linux-kernel&m=120525966600698&w=2
- Make is_vsmp_box() available even when PARAVIRT is not defined.
  This is needed to determine if tsc's are reliable as a time source
  even when PARAVIRT is not defined.
- split vsmp_init to use is_vsmp_box() and set_vsmp_pv_ops()
  set_vsmp_pv_ops will do nothing if PCI is not enabled in the config.

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Ravikiran G Thirumalai
3250c91ada x86: vSMP: Fix is_vsmp_box()
is_vsmp_box() currently does not work on vSMPowered systems,  as pci cfg
space is not read correctly -- This patch fixes it.

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Alexey Starikovskiy
864205062f x86: make struct mpc_config_translation NUMAQ-only
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Alexey Starikovskiy
0ec153af4d x86: remove mpc_oem_bus_info()
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Alexey Starikovskiy
d285e33889 x86: remove mpc_oem_pci_bus()
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:08 +02:00
Alexey Starikovskiy
4655c7deca x86: remove mpc_apic_id()
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:07 +02:00
Alexey Starikovskiy
555b07646d x86: rename gsi_start to gsi_base to match mpparse_32.c
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:05 +02:00
Alexey Starikovskiy
85e46035be x86: limit scan to 1k of EBDA.
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:05 +02:00
Alexey Starikovskiy
ce3fe6b2bf x86: use get_bios_ebda in mpparse_64.c
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:05 +02:00
Alexey Starikovskiy
e3e3ffa203 x86: add uniq_ioapic_id to mpparse_32.c
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Alexey Starikovskiy
857033a696 x86: add bad_ioapic to mpparse_32.c
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Alexey Starikovskiy
d2953315c7 x86: lindent mpparse_64.c
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
4cedb3343f x86: remove smpboot_32.c and smpboot_64.c
Remove the last leftovers from the files. Move the ones
that are still used to the files they belong, the others
that grep can't reach, simply throw away.

Merge comments ontop of file and that's it: smpboot integrated

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
acbb673418 x86: move apicid mappings to smpboot.c
They are i386 specific (the x86_64 definitions live
elsewhere, and should remain there), so are enclosed around
an ifdef

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
2cd9fb71ee x86: merge cpu_exit_clear
this is the last remaining function in smpboot_32.c
Since it is i386 specific, move it around an ifdef to
smpboot.c

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
8aef135c73 x86: merge native_smp_prepare_cpus
With the previous changes, code for native_smp_prepare_cpus()
in i386 and x86_64 now look very similar. merge them into
smpboot.c. Minor differences are inside ifdef

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
9f3734f631 x86: introduce smpboot_clear_io_apic
x86_64 has two nr_ioapics = 0 statements. In 32-bit, it can be done
too. We do it through the smpboot_clear_io_apic() inline function,
to cope with subarchitectures (visws) that does not compile mpparse in

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
771263d311 x86: change x86_64 sanity checks to match i386.
They are mostly inocuous. APIC_INTEGRATED will expand to 1,
check_phys_apicid_present is checking for the same thing it was before,
etc. But the code is identical to i386 now, and will allow us to
integrate it.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
0df1ba8cab x86: add extra sanity check
This test exists in x86_64 and also applies to i386. So we add it

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
1db17f5534 x86: change x86_64 native_smp_prepare_cpus to match i386
An APIC test is moved, and code is replaced by the mach-default
already defined function (smpboot_setup_io_apic).
setup_portio_remap() is added, but it is a nop in mach-default.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
7cefaa20e7 x86: additions to i386 native_smp_prepare_cpus.
Add function calls to native_smp_prepare_cpus in i386
to match x86_64

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
e7bc8fbad4 x86: get rid of smp_boot_cpus
This patch get rid of smp_boot_cpus(), since it does not
boot any cpu anymore. Its code is split in a way to make
it closer to x86_64

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
bd7b47ba5e x86: use physical id when disabling smp
if smp configuration is not found at all, hook into 0.
This is done to match x86_64

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
83f7eb9c67 x86: merge native_smp_cpus_done
They look similar enough, and are merged. Only difference
(zap_low_mapping for i386) is inside ifdef

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:04 +02:00
Glauber de Oliveira Costa
a8db8453ff x86: merge smp_prepare_boot_cpu
it is practically the same between arches now, so it is
moved to smpboot.c. Minor differences (gdt initialization)
live inside an ifdef

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:03 +02:00
Glauber de Oliveira Costa
bbc2ff6a91 x86: integrate start_secondary
It now looks the same between architectures, so we
merge it in smpboot.c. Minor differences goes inside
an ifdef

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:03 +02:00
Glauber de Oliveira Costa
cb3c8b9003 x86: integrate do_boot_cpu
This is a very large patch, because it depends on a lot
of auxiliary static functions. But they all have been modified
to the point that they're sufficiently close now. So they're just
merged in smpboot.c

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:03 +02:00
Glauber de Oliveira Costa
c70dcb7430 x86: change boot_cpu_id to boot_cpu_physical_apicid
This is to match i386. The former name was cuter,
but the current is more meaningful and more general,
since cpu_id can be a logical id.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
9d97d0da71 x86: move stack_start to smp.h
voyager would conflict with it, but the types are ultimately
compatible. So remove the extern definition from voyager_smp.c
in favour of the common one

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
7cc3959ecd x86: move {un}map_cpu_to_logical_apicid to smpboot.c
Move map_cpu_to_logical_apicid() and unmap_cpu_to_logical_apicid()
to smpboot.c. They take together all the bunch of static functions
they rely upon

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
b9f9294a86 x86: add callin tests to cpu_up
Now that we boot cpus here, callin_map has this meaning (same
as x86_64)

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
0717826927 x86: change wakeup_secondary name
wakeup_secondary_via_INIT => wakeup_secondary_cpu.

This is to match i386, where init is not always used.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
f6bc402909 x86: include mach_apic.h in smpboot_64.c and smpboot.c
After the inclusion, a lot of files needs fixing for conflicts,
some of them in the headers themselves, to accomodate for both
i386 and x86_64 versions.

[ mingo@elte.hu: build fix ]

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
4370ee4d3b x86: call do_boot_cpu directly from native_cpu_up
We don't need __smp_prepare_cpu anymore.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
6becedbb06 x86: minor adjustments for do_boot_cpu
This patch provides minor adjustments for do_boot_cpus
in both architectures to allow for integration

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
e481fcf856 x86: calibrate delay with irqs enabled
We do it to make it close to x86_64. The later needs it,
otherwise the nmi watchdog can get into the scene and kill us
with a hammer.

Enabling irqs here used to trigger a bug in i386. This is because
time irq handling relies upon structures that are only initialized
after smp initcalls (More precisely, it will find
per_cpu(hrtimer_bases, cpu)->cb_pending list not initialized and crash)

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
ac60aae561 x86: provide an end_local_APIC_setup function
It splits setup_local_APIC in two, providing a function corresponding
to the ending part of it. As a side effect, smp_callin looks the same
between i386 and x86_64.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
df7939ae8b x86: wrap esr setting up in i386 in lapic_setup_esr
it is a little bit more complicated than x86_64 due to erratas and
other stuff, but its existance will ease integration

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
ea0cadbfed x86: modify smp_callin in x86_64 to look like i386
We introduce empty macros just to make them look like the same

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
4c07ad6950 x86: don't span a new worker in __smp_prepare_cpu
We can do it now that do_boot_cpu has its own worker.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
365c894c65 x86: use create_idle struct in do_boot_cpu
Use a new worker, with help of the create_idle struct
to fork the idle thread. We now have two workers, the first
of them triggered by __smp_prepare_cpu. But the later is
going away soon.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
ddd10ecfa2 x86: get rid of commenced mask.
As we now boot cpus from cpu_up, we don't need it.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
9713277607 x86: boot cpus from cpu_up, instead of prepare_cpus
After all the infrastructure work, we're now prepared
to boot the cpus from cpu_up, and not from prepare_cpus.
So the difference between cold boot and hotplug is effectively
over, and the functions are used to the purposes they're meant to.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
d2bcbad5f3 x86: do not zap_low_mappings in __smp_prepare_cpus
It was okay when cpus were cold booted before this point.
But with the new state machine, they will not have arrived to
the trampoline yet. zapping low mappings will have the bad effect
of breaking it completely after paging enablement

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00
Glauber de Oliveira Costa
802b8133b4 x86: schedule work only if keventd is already running
Only call schedule_work if keventd is already running.
This is already the way x86_64 does

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 17:41:02 +02:00