This patch adds quirks to force enable HPET on Via VT8235 and
VT8237 chipsets. The datasheet for 8237 documents HPET
functionality (although wrongly) whereas HPET is undocumented
for 8235.

Tested on A7V880 (8237) and K7VT4A+ (8235) boards.

tglx: depends on the force_hept commandline option
Signed-off-by: Udo A. Steinberg <us15@os.inf.tu-dresden.de>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

add force_hpet boot option.

(this will be useful to make the forced-enable quirks depend on.)
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

don't zero pad addresses in segfault message. Matches the other trap
messages. This leaves some more space for the new file name.

[ mingo: arch/x86 adaptation ]
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

This makes x86-64's ia32 code use the new linux/elfcore-compat.h, reducing
some hand-copied duplication.
Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Andi Kleen <ak@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Merge init_task_32/64.c.
Move 64bit per cpu data orig_ist to setup64.c.

[ mingo: fixed checkpatch trivialities. ]
Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Old debugging code that is not really needed anymore. If someone
wants it it would be better replaced with a systemtap script or
kprobe.

This avoids a potential cache miss during page fault processing.

[ mingo: arch/x86 adaptation ]
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

The helptext for IA32_EMULATION in arch/x86_64/Kconfig is wider than 80
chars, thus failing to be displayed in 80x24 screens.

This patch re-breaks lines.
Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>

Move the 64bit Kconfig file to arch/x86/kernel/cpu/cpufreq, so we
can unify them.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Simple cosmetic update for the cs5536 reboot fixup; define the MSR that's used
for rebooting in geode.h, and use the define.
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86 NUMA kernels crash in the scheduler setup code if "nosmp" or
"maxcpus=0" is passed on the boot command line:

| Brought up 1 CPUs
| BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
| printing eip: c011f0b5 *pde = 00000000
| Oops: 0000 [#1] SMP
|
| Pid: 1, comm: swapper Not tainted (2.6.23 #67)
| EIP: 0060:[<c011f0b5>] EFLAGS: 00010246 CPU: 0
| EIP is at sd_degenerate+0x35/0x40

the reason is sloppy spaghetti code in smpboot_32.c that resulted in a
missing map_cpu_to_logical_apicid() call - which also had the side-effect
of setting up the cpu_2_node[] entry for the lone CPU. That resulted in
node_to_cpumask(0) resulting in 00000000 - confusing the sched-domains
setup code.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Use relative symlinks so we can refer bzImage from different tree
structures aka via NFS.

Moved the creation of directory + symlink after a successful build of
the boot parts.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Appended patch fixes an oops while changing the vsyscall sysctl.
I am sure no one tested this code before integrating into mainline :(

BTW, using ioremap() in vsyscall_sysctl_change() to get the virtual
address of a kernel symbol sounds like an over kill.. I wonder if we
can define a simple __va_vsymbol() which will return directly the
kernel direct mapping. comments in the code which says gcc has trouble
with __va(__pa()) sounds bogus to me. __pa() on a vsyscall address will
not work anyhow :(

And also, the whole nop out syscall in vsyscall page infrastructure
(vsyscall_sysctl_change()) is added to make some attacks difficult,
and yet I don't see this nop out being done by default. This area
requires more cleanups?

Fix an oops with __pa_vsymbol(). VSYSCALL_FIRST_PAGE is a fixmap index.
We want the starting virtual address of the vsyscall page and not the index.

[ mingo: arch/x86 adaptation ]
Reported-by: Yanmin Zhang <yanmin.zhang@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

vdso / vsycall create .so.dbg files now.
Add *.so.dbg to the main .ignore file

Exclude the compile time created boot directory in arch/x86_64 as well
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

While we were reviewing pageattr_32/64.c for unification,
Thomas Gleixner noticed the following serious SMP bug in
global_flush_tlb():

	down_read(&init_mm.mmap_sem);
	list_replace_init(&deferred_pages, &l);
	up_read(&init_mm.mmap_sem);

this is SMP-unsafe because list_replace_init() done on two CPUs in
parallel can corrupt the list.

This bug has been introduced about a year ago in the 64-bit tree:

       commit ea7322de
       Author: Andi Kleen <ak@suse.de>
       Date:   Thu Dec 7 02:14:05 2006 +0100

       [PATCH] x86-64: Speed and clean up cache flushing in change_page_attr

                down_read(&init_mm.mmap_sem);
        -       dpage = xchg(&deferred_pages, NULL);
        +       list_replace_init(&deferred_pages, &l);
                up_read(&init_mm.mmap_sem);

the xchg() based version was SMP-safe, but list_replace_init() is not.
So this "cleanup" introduced a nasty bug.

why this bug never become prominent is a mystery - it can probably be
explained with the (still) relative obscurity of the x86_64 architecture.

the safe fix for now is to write-lock init_mm.mmap_sem.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  pcnet32: remove private net_device_stats structure
  vortex_up should initialize "err"
  pcnet32: remove compile warnings in non-napi mode
  pcnet32: fix non-napi packet reception
  fix EMAC driver for proper napi_synchronize API
  sky2: shutdown cleanup
  napi_synchronize: waiting for NAPI
  forcedeth msi bugfix
  gianfar: fix obviously wrong #ifdef CONFIG_GFAR_NAPI placement
  fs_enet: Update for API changes
  gianfar: remove orphan struct.
  forcedeth: fix rx-work condition in nv_rx_process_optimized() too

* master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6: (37 commits)
  ide: set drive->autotune in ide_pci_setup_ports()
  triflex: always tune PIO
  opti621: always tune PIO
  cy82c693: always tune PIO
  cs5520: always tune PIO
  alim15x3: always tune PIO
  ide: add IDE_HFLAG_LEGACY_IRQS host flag
  ide: add IDE_HFLAG_SERIALIZE host flag
  ide: add IDE_HFLAG_ERROR_STOPS_FIFO host flag
  piix: add DECLARE_ICH_DEV() macro
  pdc202xx_old: add DECLARE_PDC2026X_DEV() macro
  pdc202xx_new: add DECLARE_PDCNEW_DEV() macro
  aec62xx: no need to disable UDMA in ->init_hwif method for ATP850UF
  ide: remove .init_setup from ide_pci_device_t
  serverworks: remove ->init_setup
  scc_pata: remove ->init_setup
  pdc202xx_old: remove ->init_setup
  pdc202xx_new: remove ->init_setup
  hpt366: remove ->init_setup
  cmd64x: remove ->init_setup
  ...

Majority of host drivers using IDE PCI layer set drive->autotune, the only
exceptions are:

generic.c
ns87415.c
rz1000.c
trm290.c
* no ->set_pio_mode method

it821x.c:
* if memory allocation fails drive->autotune won't be set
  (but there also won't be ->set_pio_mode method in such case)

piix.c:
* MPIIX controller (no ->init_hwif method so also no ->set_pio_mode method)

However if there is no ->set_pio_mode method there are no changes in behavior
w.r.t. PIO tuning so always set drive->autotune in ide_pci_setup_ports().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Since cs5520 uses VDMA best PIO mode was tuned anyway by ide_dma_check()
but only if DMA was successfully initialized.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Add IDE_HFLAG_LEGACY_IRQS host flag to tell ide_pci_setup_ports() to set
hwif->irq to legacy IRQ 14/15 (iff hwif->irq is not already set) and convert
atiixp, piix, serverworks, sis5513 and slc90e66 host drivers to use it.

While at it:

* In piix.c add IDE_HFLAGS_PIIX define and don't use ->init_hwif for MPIIX.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Add IDE_HFLAG_SERIALIZE host flag to tell ide_pci_setup_ports() to set
hwif/mate->serialized and convert aec62xx, cs5530 and sc1200 host drivers
to use it.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Add IDE_HFLAG_ERROR_STOPS_FIFO host flag and use it instead
of hwif->err_stops_fifo.  As a side-effect this change fixes
hwif->err_stops_fifo not being restored by ide_hwif_restore().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Add DECLARE_ICH_DEV() macro.

While at it:

* Add init_hwif_ich() (->init_hwif method) for ICH controllers.

* Rename init_chipset_piix() to init_chipset_ich() and use it only for
  ICH controllers.

* Remove no longer needed piix_is_ichx() helper.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* No need to disable UDMA in ->init_hwif method for ATP850UF (and since we
  now always tune PIO it will be disabled by ->set_pio_mode calls anyway).

* Bump driver version.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Now that all users were fixed we can safely remove it.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Merge init_setup_{svwks,csb6}() into svwks_init_one().

While at it:

* Remove redundant dev->device checks.

* Operate on a local copy of serverworks_chipsets[] entry.

* Use pci_resource_start().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Split off pdc202ata4_fixup_irq() helper from init_setup_pdc202ata4().

* Merge init_setup_{pdc202ata4,pdc20265,pdc202xx}() into pdc202xx_init_one().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Split off pdc20270_get_dev2() helper from init_setup_pdc20270().

* Merge init_setup_{pdcnew,pdc20270,pdc20276}() into pdc202new_init_one().

While at it:

* Change KERN_ level of interrupt fixup message from KERN_WARNING to KERN_INFO.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Split off hpt{374,371,366}_init() helper from init_setup_hpt{374,371,366}().

* Merge init_setup_{374,372n,371,372a,302,366}() into hpt366_init_one().

While at it:

* Use "HPT36x" name for HPT366/HPT368 chipsets.

* Add .chip_name to struct hpt_info and use it to set set d->name.

* Convert .max_ultra in struct hpt_info to .udma_mask and use it to set
  d->udma_mask.

* Fix hpt302 to use HPT302_ALLOW_ATA133_6 define.

* Change HPT366/HPT374 interrupt fixup message from KERN_WARNING to KERN_INFO.

* Use the second hpt366_chipsets[] entry for HPT37x chipsets using HPT36x PCI
  device ID and fix .enablebits/.host_flags for HPT36x hpt366_chipsets[] entry.

* Bump driver version.

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Merge init_setup_{cmd64x,cmd646}() into cmd64x_init_one().

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Merge init_setup_{aec62xx,aec6x80}() into aec62xx_init_one().

While at it:

* Use id->driver_data instead of dev->device.

* Use ATA_UDMA6 define.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

v2:
- bump host driver versions (as suggested by Sergei)
- use I/O ops directly in drivers/ide/setup-pci.c

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Some places were using PCI_CLASS_REVISION instead of PCI_REVISION_ID so
they were not converted by commit 44c10138.

Cc: Auke Kok <auke-jan.h.kok@intel.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>