Impact: fix rare crash on 32-bit

The 32-bit APIC drivers had their send_IPI_self vectors set to NULL,
but ioapic_retrigger_irq() depends on it being always set. Fix it.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

just like 64 bit switch from flat logical APIC messages to
flat physical mode automatically.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: 32-bit should use logical version

there are two version: for default_send_IPI_mask_sequence/allbutself
one in ipi.h and one in ipi.c for 32bit

it seems .h version overwrote ipi.c for a while.

restore it so 32 bit could use its old logical version.
also remove dupicated functions in .c
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

only need to do cut off with 32bit
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: cleanup

remove unused files
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

X86_PC is the only remaining 'sub' architecture, so we dont need
it anymore.

This also cleans up a few spurious references to X86_PC in the
driver space - those certainly should be X86.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

xapic fix for 32bit platform with less than 8 cpu's.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Make Voyager depend on X86_32_NON_STANDARD - it is a non-standard 32-bit
SMP architecture.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

X86_GENERICARCH is a misnomer - it contains non-PC 32-bit architectures
that are not included in the default build.

Rename it to X86_32_NON_STANDARD.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Remove the subarch menu and standardize on X86_PC.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Move X86_VSMP out of the subarch menu - this way it can be enabled
together with standard PC support as well, in the same kernel.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

- make X86_GENERICARCH depend X86_NON_STANDARD

- move X86_SUMMIT, X86_ES7000 and X86_BIGSMP out of the subarchitecture
  menu and under this option
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Move X86_ELAN (old, NCR hw platform built on Intel CPUs) from the
subarchitecture menu to the non-standard-platform section.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Move X86_ELAN (old, AMD based web-boxes) from the subarchitecture
menu to the non-standard-platform section.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Introduce a Y/N Kconfig option for non-PC x86 platforms.

Make VisWS, RDC321 and SGI/UV depend on this.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this ISA quirk (because Voyager has no ISA support):

 config ISA
 	bool "ISA support"
	depends on !X86_VOYAGER

There's a ton of x86 hardware that does not support ISA, and because
most ISA drivers cannot auto-detect in a safe way, the convention in
the kernel has always been to not enable ISA drivers if they are not
needed.

Voyager users can do likewise - no need for a Kconfig quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this PM/ACPI Kconfig quirk:

 menu "Power management and ACPI options"
	depends on !X86_VOYAGER

Most of the PM features are auto-detect so they should be safe to run
on just about any hardware. (If not, those instances need fixing.)

In any case, if a kernel is built for Voyager, the power management
options can be disabled.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this Kconfig quirk:

 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
	depends on SMP && HOTPLUG && !X86_VOYAGER

But this exception will be moot once Voyager starts using the
generic x86 code.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

If no MCE code is desired on Voyager hw then the solution
is to turn them off in the .config - and to extend the MCE
code to not initialize on Voyager.

Remove the build-time quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

The lapic/ioapic code properly auto-detects and is safe to run on CPUs that
have no local APIC. (or which have their lapic turned off in the hardware)
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Remove this Kconfig quirk:

 config PARAVIRT
 	bool "Enable paravirtualization code"
	depends on !X86_VOYAGER
 	help

Voyager support built into a kernel does not preclude paravirt support.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this quirk currently:

 config KVM_GUEST
 	bool "KVM Guest support"
 	select PARAVIRT
	depends on !X86_VOYAGER

Voyager support built into a kernel image does not exclude
KVM paravirt guest support - so remove this quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this build-time quirk to exclude KVM_CLOCK:

 	bool "KVM paravirtualized clock"
 	select PARAVIRT
 	select PARAVIRT_CLOCK
	depends on !X86_VOYAGER

Voyager support built into a kernel image does not exclude
KVM paravirt clock support - so remove this quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

x86/Voyager has this build-time quirk:

 	bool "VMI Guest support"
 	select PARAVIRT
 	depends on X86_32
	depends on !X86_VOYAGER

Since VMI is auto-detected (and Voyager will be auto-detected) there's no
reason for this quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

VisWS has this quirk currently:

 config X86_VISWS
 	bool "SGI 320/540 (Visual Workstation)"
	depends on X86_32 && PCI && !X86_VOYAGER && X86_MPPARSE && PCI_GODIRECT

The !Voyager quirk is unnecessary.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

x86/Voyager had this Kconfig quirk:

 config X86_FIND_SMP_CONFIG
	def_bool y
	depends on X86_MPPARSE || X86_VOYAGER

Which splits off the find_smp_config() callback into a build-time quirk.

Voyager should use the existing x86_quirks.mach_find_smp_config() callback
to introduce SMP-config quirks. NUMAQ-32 and VISWS already use this.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this Kconfig quirk:

config X86_BIOS_REBOOT
	bool
	depends on !X86_VOYAGER
	default y

Voyager should use the existing machine_ops.emergency_restart reboot
quirk mechanism instead of a build-time quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this Kconfig quirk:

	depends on (X86_32 && !X86_VOYAGER) || X86_64

That is unnecessary as HT support is CPUID driven and explicitly
 enumerated.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

x86/Voyager can boot on non-zero processors. While that can probably
be fixed by properly remapping the physical CPU IDs, keep boot_cpu_id
for now for easier transition - and expand it to all of x86.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

The x86/Voyager subarch used to have this distinction between
 'x86 SMP support' and 'Voyager SMP support':

 config X86_SMP
	bool
	depends on SMP && ((X86_32 && !X86_VOYAGER) || X86_64)

This is a pointless distinction - Voyager can (and already does) use
smp_ops to implement various SMP quirks it has - and it can be extended
more to cover all the specialities of Voyager.

So remove this complication in the Kconfig space.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this Kconfig quirk for suspend/resume:

 config ARCH_SUSPEND_POSSIBLE
 	def_bool y
 	depends on !X86_VOYAGER

The proper mechanism to not suspend on a piece of hardware to disable
CONFIG_SUSPEND. Remove the quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager has this hibernation quirk:

 config ARCH_HIBERNATION_POSSIBLE
 	def_bool y
	depends on !SMP || !X86_VOYAGER

Hibernation is a generic facility provided on all x86 platforms. If it
is buggy on Voyager then that bug should be fixed - not worked around.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

x86/Voyager has this KGDB quirk:

	select HAVE_ARCH_KGDB if !X86_VOYAGER

This is completely pointless - there's nothing in KGDB that cannot work
on Voyager. Remove it.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Voyager and other subarchitectures have this Kconfig quirk:

 	select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)

This is unnecessary, as KVM cleanly detects based on CPUID capabilities.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

x86/Voyager has this quirk for SCx200 support:

 config SCx200
 	tristate "NatSemi SCx200 support"
	depends on !X86_VOYAGER

Remove it - Voyager users can disable drivers they dont need.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Remove Voyager Kconfig quirk: just like any other hardware platform
users of Voyager systems can configure in the hardware drivers they need.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

x86/Voyager does not build right now and it's unclear whether it will
be cleaned up and ported to the subarch-less 32-bit x86 code - so disable
it for now.

If it's fixed we'll re-enable it - or remove it after some time. There's
a very low number of systems running development kernels on x86/Voyager
currently. (one or two on the whole planet)
Signed-off-by: NIngo Molnar <mingo@elte.hu>

CONFIG_BROKEN has been removed from the upstream kernel years ago,
but X86_VOYAGER still had a stale reference to it - remove it.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Remove the 32-bit subarchitecture support code.

All subarchitectures but Voyager have been converted. Voyager will be
done later or will be removed.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

We are getting rid of subarchitecture support - move the hook files
to asm/. (These are now stale and should be replaced with more explicit
runtime mechanisms - but the transition is simpler this way.)
Signed-off-by: NIngo Molnar <mingo@elte.hu>