]> err.no Git - linux-2.6/log
linux-2.6
16 years agox86, AMD IOMMU: clean up Kconfig entry
FUJITA Tomonori [Thu, 10 Jul 2008 00:50:50 +0000 (09:50 +0900)]
x86, AMD IOMMU: clean up Kconfig entry

AMD_IOMMU should depend on IOMMU_HELPER since they are the IOMMU
helper functions. SWIOTLB requires IOMMU_HELPER so declaring that
AMD_IOMMU depends on SWIOTLB properly fixes the problems.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: clean up iommu.h and gart.h
FUJITA Tomonori [Wed, 9 Jul 2008 23:27:49 +0000 (08:27 +0900)]
x86: clean up iommu.h and gart.h

This remove lots of duplications in iommu.h and gart.h.

The end result of this patch is:

- iommu.h is a header file for everyone related with IOMMUs.

- gart.h is the private header file. Only pci-gart_64.c and its friends
  include it.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: fujita.tomonori@lab.ntt.co.jp
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'x86/gart' into x86/core
Ingo Molnar [Thu, 10 Jul 2008 08:43:11 +0000 (10:43 +0200)]
Merge branch 'x86/gart' into x86/core

16 years agox86: make e820_end return end_of_ram again for 64bit
Yinghai Lu [Thu, 10 Jul 2008 03:17:50 +0000 (20:17 -0700)]
x86: make e820_end return end_of_ram again for 64bit

even on 64bit systems with less than 4G RAM, we can now use fixmap
to handle acpi SIT near end of ram.

change e820_end to e820_end_of_ram again?
or e820_ram_pfn?

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, acpi: merge __acpi_map_table
Yinghai Lu [Thu, 10 Jul 2008 03:16:36 +0000 (20:16 -0700)]
x86, acpi: merge __acpi_map_table

and let 64-bit to fall back to use fixmap too.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: overmapped fix when 4K pages on tail, 64-bit
Yinghai Lu [Thu, 10 Jul 2008 03:15:02 +0000 (20:15 -0700)]
x86: overmapped fix when 4K pages on tail, 64-bit

fix phys_pmd_init to make sure not to return bigger value than end.

also print out range split:1G/2M/4K in init_memory_mapping().

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: build fix for "x86: fix C1E && nx6325 stability problem"
Ingo Molnar [Wed, 9 Jul 2008 11:07:23 +0000 (13:07 +0200)]
x86: build fix for "x86: fix C1E && nx6325 stability problem"

fix:

 arch/x86/kernel/built-in.o: In function `dmi_ignore_irq0_timer_override':
 boot.c:(.init.text+0x3ea4): undefined reference to `force_mask_ioapic_irq_2'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: fix copy_user on x86
Vitaly Mayatskikh [Wed, 2 Jul 2008 13:53:13 +0000 (15:53 +0200)]
x86: fix copy_user on x86

Switch copy_user_generic_string(), copy_user_generic_unrolled() and
__copy_user_nocache() from custom tail handlers to generic
copy_user_tail_handle().

Signed-off-by: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: introduce copy_user_handle_tail() routine
Vitaly Mayatskikh [Wed, 2 Jul 2008 13:48:21 +0000 (15:48 +0200)]
x86: introduce copy_user_handle_tail() routine

Introduce generic C routine for handling necessary tail operations after
protection fault in copy_*_user on x86.

Signed-off-by: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'x86/unify-lib' into x86/core
Ingo Molnar [Wed, 9 Jul 2008 13:00:48 +0000 (15:00 +0200)]
Merge branch 'x86/unify-lib' into x86/core

16 years agox86: e820 memmap - add checking for NULL early param
Cyrill Gorcunov [Sat, 5 Jul 2008 11:53:39 +0000 (15:53 +0400)]
x86: e820 memmap - add checking for NULL early param

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: akpm@linux-foundation.org
Cc: andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: make e820_end return max ram type only for 32 bit
Yinghai Lu [Wed, 9 Jul 2008 10:01:14 +0000 (03:01 -0700)]
x86: make e820_end return max ram type only for 32 bit

to avoid warning from find_low_pfn_range for high pages size etc

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: build fix for "x86: fix C1E && nx6325 stability problem"
Ingo Molnar [Wed, 9 Jul 2008 09:32:10 +0000 (11:32 +0200)]
x86: build fix for "x86: fix C1E && nx6325 stability problem"

fix:

arch/x86/kernel/acpi/boot.c: In function ‘dmi_ignore_irq0_timer_override’:
arch/x86/kernel/acpi/boot.c:1443: error: implicit declaration of function ‘force_mask_ioapic_irq_2’

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: fix C1E && nx6325 stability problem
Rafael J. Wysocki [Tue, 8 Jul 2008 14:12:26 +0000 (16:12 +0200)]
x86: fix C1E && nx6325 stability problem

The problems are that, with the ACPI vs timer overring issue _fixed_,
after using the box for some time (between several seconds and 1 hour, at
random) processes get very high CPU loads (once I've got X using 107% of
the CPU, for example) and the system becomes unresponsive, as though there
were interrupts lost or something similar.

Andreas Herrman reproduced similar problems:

> Ok, now I've reproduced the stability problem.
> - Using tip/master,
> - reverting e38502eb8aa82314d5ab0eba45f50e6790dadd88 and
> - applying your patch from this posting
>   http://marc.info/?l=linux-kernel&m=121539354224562&w=4
>
> Starting X, firefox, gimp, tuxpaint and doing some drawing in tuxpaint
> results in a slow system. Drawing is almost not possible anymore --
> Selections of new colors, cursors etc. is performed with huge delay
> if it's performed at all.
>
> BTW, the code sets up timer IRQ as Virtual Wire IRQ:
>
> Jul  8 14:57:58 kodscha IO-APIC (apicid-pin) 2-22, 2-23 not connected.
> Jul  8 14:57:58 kodscha ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> Jul  8 14:57:58 kodscha ...trying to set up timer as Virtual Wire IRQ... works.
>
> and both INT0 and INT2 of IOAPIC are masked:
>
> Jul  8 14:57:58 kodscha NR Dst Mask Trig IRR Pol Stat Dmod Deli Vect:
> Jul  8 14:57:58 kodscha 00 000 1    0    0   0   0    0    0    00
> Jul  8 14:57:58 kodscha 01 003 0    0    0   0   0    1    1    31
> Jul  8 14:57:58 kodscha 02 003 1    0    0   0   0    0    0    30
>
> I've also seen strange CPU utilization -- with syslog-ng:
>
> top - 15:33:06 up 35 min,  4 users,  load average: 1.70, 0.68, 0.37
> Tasks:  64 total,   4 running,  60 sleeping,   0 stopped,   0 zombie
> Cpu0  :  0.0%us,100.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu1  :  6.4%us, 87.2%sy,  0.0%ni,  5.8%id,  0.0%wa,  0.6%hi,  0.0%si,  0.0%st
> Mem:    895384k total,   283568k used,   611816k free,    35492k buffers
> Swap:  1959920k total,        0k used,  1959920k free,   163044k cached
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  4632 root      20   0 17216  800  580 S  104  0.1   0:34.22 syslog-ng
> 28505 root      20   0  205m  11m 4024 S    6  1.3   0:21.16 X
> 28518 root      20   0 56292 5652 4492 S    1  0.6   0:01.80 fluxbox
>     1 root      20   0  3724  608  508 S    0  0.1   0:00.36 init
>
> So far I have no clue why C1E-idle in conjunction with virtual wire
> mode causes this strange behaviour.
>
> ... and I start to think about the root cause of all this.
>
> I've performed similar tests under X with the IRQ0/INT0 configuration and
> I did not see above symptoms.

So lets fall back to the IRQ0/INT0 configuration on this box.

This basically restores the dont-use-the-lapic-timer exception mechanism
that was unconditional on this box prior commit 8750bf5 ("x86: add C1E
aware idle function").

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, iommu: replace CONFIG_IOMMU with CONFIG_GART_IOMMU in iommu.h
FUJITA Tomonori [Wed, 9 Jul 2008 07:29:41 +0000 (16:29 +0900)]
x86, iommu: replace CONFIG_IOMMU with CONFIG_GART_IOMMU in iommu.h

Hmm, looks like it would be nice to have more cleanups of iommu.h and
gart.h.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: not overmap more than the end of RAM in init_memory_mapping - 64bit
Yinghai Lu [Tue, 8 Jul 2008 08:43:27 +0000 (01:43 -0700)]
x86: not overmap more than the end of RAM in init_memory_mapping - 64bit

handle head and tail that are not aligned to big pages (2MB/1GB boundary).

with this patch, on system that support gbpages, change:

  last_map_addr: 1080000000 end: 1078000000

to:

  last_map_addr: 1078000000 end: 1078000000

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: make max_pfn cover acpi table below 4g
Yinghai Lu [Wed, 9 Jul 2008 01:56:38 +0000 (18:56 -0700)]
x86: make max_pfn cover acpi table below 4g

When system have 4g less ram installed, and acpi table sit
near end of ram, make max_pfn cover them too,
so 64bit kernel don't need to mess up fixmap.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: "Suresh Siddha" <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: fix vmemmap printout check
Yinghai Lu [Thu, 3 Jul 2008 19:29:34 +0000 (12:29 -0700)]
x86: fix vmemmap printout check

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: "Nick Piggin" <npiggin@suse.de>
Cc: "Mark McLoughlin" <markmc@redhat.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: "Eduardo Habkost" <ehabkost@redhat.com>
Cc: "Vegard Nossum" <vegard.nossum@gmail.com>
Cc: "Stephen Tweedie" <sct@redhat.com>
Cc: "Jeremy Fitzhardinge" <jeremy@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: introduce page_size_mask for 64bit
Yinghai Lu [Tue, 8 Jul 2008 08:41:05 +0000 (01:41 -0700)]
x86: introduce page_size_mask for 64bit

prepare for overmapped patch

also printout last_map_addr together with end

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: define architectural characteristics in uaccess.h.
Glauber Costa [Wed, 25 Jun 2008 17:56:53 +0000 (14:56 -0300)]
x86: define architectural characteristics in uaccess.h.

Remove them from the arch-specific file.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: put movsl_mask into uaccess.h.
Glauber Costa [Wed, 25 Jun 2008 17:53:41 +0000 (14:53 -0300)]
x86: put movsl_mask into uaccess.h.

x86_64 does not need it, but it won't have X86_INTEL_USERCOPY
defined either.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: move __get_user and __put_user into uaccess.h.
Glauber Costa [Wed, 25 Jun 2008 17:43:30 +0000 (14:43 -0300)]
x86: move __get_user and __put_user into uaccess.h.

We also carry the unaligned version with us. Only x86_64 uses
it, but there's no problem in defining it.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge put_user.
Glauber Costa [Wed, 25 Jun 2008 16:17:43 +0000 (13:17 -0300)]
x86: merge put_user.

Move both versions, which are highly similar, to uaccess.h.
Note that, for x86_64, X86_WP_WORKS_OK is always defined.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: turn __put_user_check directly into put_user.
Glauber Costa [Wed, 25 Jun 2008 16:00:48 +0000 (13:00 -0300)]
x86: turn __put_user_check directly into put_user.

We also check user pointer in x86_64 put_user, the way i386 does.

In a separate patch for bisecting purposes.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: be more explicit in __put_user_x.
Glauber Costa [Wed, 25 Jun 2008 15:59:37 +0000 (12:59 -0300)]
x86: be more explicit in __put_user_x.

For both __put_user_x and __put_user_8 macros, pass the error
variable explicitly.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge __get_user_asm and its users.
Glauber Costa [Wed, 25 Jun 2008 15:48:47 +0000 (12:48 -0300)]
x86: merge __get_user_asm and its users.

Move __get_user_asm and __get_user_size and __get_user_nocheck
to uaccess.h. This requires us to define a macro at __get_user_size
for the 64-bit access case.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't always use EFAULT on __get_user_size.
Glauber Costa [Wed, 25 Jun 2008 14:57:33 +0000 (11:57 -0300)]
x86: don't always use EFAULT on __get_user_size.

Let the user of the macro specify the desired return.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge __put_user_asm and its user.
Glauber Costa [Wed, 25 Jun 2008 14:48:29 +0000 (11:48 -0300)]
x86: merge __put_user_asm and its user.

Move both __put_user_asm and __put_user_size to
uaccess.h. i386 already had a special function for 64-bit access,
so for x86_64, we just define a macro with the same name.
Note that for X86_64, CONFIG_X86_WP_WORKS_OK will always
be defined, so the #else part will never be even compiled in.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't always use EFAULT on __put_user_size.
Glauber Costa [Wed, 25 Jun 2008 15:00:44 +0000 (12:00 -0300)]
x86: don't always use EFAULT on __put_user_size.

Let the user of the macro specify the desired return.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: mark x86_64 as having a working WP.
Glauber Costa [Wed, 25 Jun 2008 14:40:42 +0000 (11:40 -0300)]
x86: mark x86_64 as having a working WP.

Select X86_WP_WORKS_OK for x86_64 too.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use k modifier for 4-byte access.
Glauber Costa [Wed, 25 Jun 2008 14:35:06 +0000 (11:35 -0300)]
x86: use k modifier for 4-byte access.

Do it in a separate patch for bisectability.
Goal is to have put_user_size integrated.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: move __addr_ok to uaccess.h.
Glauber Costa [Wed, 25 Jun 2008 14:08:51 +0000 (11:08 -0300)]
x86: move __addr_ok to uaccess.h.

Take it out of uaccess_32.h. Since it seems that no users
of the x86_64 exists, we simply pick the i386 version.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge getuser.
Glauber Costa [Wed, 25 Jun 2008 14:05:11 +0000 (11:05 -0300)]
x86: merge getuser.

Merge versions of getuser from uaccess_32.h and uaccess_64.h into
uaccess.h. There is a part which is 64-bit only (for now), and for
that, we use a __get_user_8 macro.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge common parts of uaccess.
Glauber Costa [Fri, 13 Jun 2008 17:39:25 +0000 (14:39 -0300)]
x86: merge common parts of uaccess.

Common parts of uaccess_32.h and uaccess_64.h
are put in uaccess.h. Bits in uaccess_32.h and
uaccess_64.h that come to this file are equal
except for comments and whitespaces differences.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use something common for both architectures.
Glauber Costa [Sat, 14 Jun 2008 00:01:46 +0000 (21:01 -0300)]
x86: use something common for both architectures.

Using explicit hexa (0xFFFFFFUL) introduces an unnecessary difference
between i386 and x86_64 because of the size of their long. Use -1UL instead.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use long instead of int.
Glauber Costa [Mon, 30 Jun 2008 20:37:08 +0000 (17:37 -0300)]
x86: use long instead of int.

Do not refer to the processor word-size with int, as it won't
work with x86_64. Use long instead.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: introduce likely in macro.
Glauber Costa [Mon, 30 Jun 2008 20:34:39 +0000 (17:34 -0300)]
x86: introduce likely in macro.

Put the likely hint in access_ok. Just for
bisectability.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: change asm constraint.
Glauber Costa [Mon, 30 Jun 2008 20:07:51 +0000 (17:07 -0300)]
x86: change asm constraint.

Our integration efforts broke a build with this function being used
with i386. Reason is "g" can put the operand in an imm32, which according
to The Book (tm), is invalid as the second operand.

This is actually a bug
in x86_64 too, since the x86_64 instruction set reference does not list
it as valid.

We probably didn't trigger this before due to the ammount of
registers available for 64-bit platforms. But that's just my guess.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: commonize __range_not_ok.
Glauber Costa [Wed, 25 Jun 2008 13:14:13 +0000 (10:14 -0300)]
x86: commonize __range_not_ok.

For i386, __range_not_ok is a better name than __range_ok, since
it returns 0 when it is in fact okay. Other than that,
both versions does not need the word size specifiers, and we remove them.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge putuser asm functions.
Glauber Costa [Tue, 24 Jun 2008 20:40:14 +0000 (17:40 -0300)]
x86: merge putuser asm functions.

putuser_32.S and putuser_64.S are merged into putuser.S.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use macros from asm.h.
Glauber Costa [Tue, 24 Jun 2008 20:36:31 +0000 (17:36 -0300)]
x86: use macros from asm.h.

In putuser_32.S and putuser_64.S, replace things like .quad, .long,
and explicit references to [r|e]ax for the apropriate macros
in asm/asm.h.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't use word-size specifiers in putuser files.
Glauber Costa [Tue, 24 Jun 2008 19:59:05 +0000 (16:59 -0300)]
x86: don't use word-size specifiers in putuser files.

Remove them where unambiguous.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: replace function headers by macros.
Glauber Costa [Tue, 24 Jun 2008 19:56:30 +0000 (16:56 -0300)]
x86: replace function headers by macros.

In putuser_64.S, do it the i386 way, and replace the code
in beginning and end of functions with macros, since it's
always the same thing. Save lines.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: change testing logic in putuser_64.S.
Glauber Costa [Tue, 24 Jun 2008 19:51:59 +0000 (16:51 -0300)]
x86: change testing logic in putuser_64.S.

Instead of operating over a register we need to put back
into normal state afterwards (the memory position), just
sub from rbx, which is trashed anyway. We can save a few instructions.

Also, this is the i386 way.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: pass argument to putuser_64 functions in ax register.
Glauber Costa [Tue, 24 Jun 2008 19:44:39 +0000 (16:44 -0300)]
x86: pass argument to putuser_64 functions in ax register.

This is consistent with i386 usage.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: clobber rbx in putuser_64.S.
Glauber Costa [Tue, 24 Jun 2008 18:03:40 +0000 (15:03 -0300)]
x86: clobber rbx in putuser_64.S.

Instead of clobbering r8, clobber rbx, which is the i386 way.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: user put_user_x instead of all variants.
Glauber Costa [Tue, 24 Jun 2008 18:02:31 +0000 (15:02 -0300)]
x86: user put_user_x instead of all variants.

Follow the pattern, and define a single put_user_x, instead
of defining macros for all available sizes. Exception is
put_user_8, since the "A" constraint does not give us enough
power to specify which register (a or d) to use in the 32-bit
common case.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't save ebx in putuser_32.S.
Glauber Costa [Tue, 24 Jun 2008 15:40:55 +0000 (12:40 -0300)]
x86: don't save ebx in putuser_32.S.

Clobber it in the inline asm macros, and let the compiler do this for us.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge getuser asm functions.
Glauber Costa [Tue, 24 Jun 2008 15:05:11 +0000 (12:05 -0300)]
x86: merge getuser asm functions.

getuser_32.S and getuser_64.S are merged into getuser.S.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use _ASM_PTR instead of explicit word-size pointers.
Glauber Costa [Tue, 24 Jun 2008 15:02:44 +0000 (12:02 -0300)]
x86: use _ASM_PTR instead of explicit word-size pointers.

Switch .long and .quad with _ASM_PTR in getuser*.S.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: introduce __ASM_REG macro.
Glauber Costa [Tue, 24 Jun 2008 14:37:57 +0000 (11:37 -0300)]
x86: introduce __ASM_REG macro.

There are situations in which the architecture wants to use the
register that represents its word-size, whatever it is. For those,
introduce __ASM_REG in asm.h, along with the first users _ASM_AX
and _ASM_DX. They have users waiting for it, namely the getuser
functions.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't use word-size specifiers on getuser_64.
Glauber Costa [Tue, 24 Jun 2008 14:21:53 +0000 (11:21 -0300)]
x86: don't use word-size specifiers on getuser_64.

The instructions access registers, so the size is unambiguous.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: rename threadinfo to TI.
Glauber Costa [Tue, 24 Jun 2008 14:19:35 +0000 (11:19 -0300)]
x86: rename threadinfo to TI.

This is for consistency with i386.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: adapt x86_64 getuser functions.
Glauber Costa [Tue, 24 Jun 2008 14:13:16 +0000 (11:13 -0300)]
x86: adapt x86_64 getuser functions.

Instead of doing a sub after the addition, use the
offset directly at the memory operand of the mov instructions.
This is the way i386 do.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't use word-size specifiers.
Glauber Costa [Sat, 14 Jun 2008 01:41:51 +0000 (22:41 -0300)]
x86: don't use word-size specifiers.

Since the instructions refer to registers, they'll be able
to figure it out.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't clobber r8 nor use rcx.
Glauber Costa [Fri, 13 Jun 2008 19:35:52 +0000 (16:35 -0300)]
x86: don't clobber r8 nor use rcx.

There's really no reason to clobber r8 or pass the address in rcx.
We can safely use only two registers (which we already have to touch anyway)
to do the job.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: delay lib unification build fix
Ingo Molnar [Wed, 9 Jul 2008 07:12:55 +0000 (09:12 +0200)]
x86: delay lib unification build fix

fix:

arch/x86/lib/delay.c:93:24: error: macro "use_tsc_delay" passed 1 arguments, but takes just 0
arch/x86/lib/delay.c:94: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: integrate delay functions.
Glauber Costa [Thu, 3 Jul 2008 15:35:41 +0000 (12:35 -0300)]
x86: integrate delay functions.

delay_32.c, delay_64.c are now equal, and are integrated into delay.c.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: explicitly use edx in const delay function.
Glauber Costa [Tue, 24 Jun 2008 13:21:25 +0000 (10:21 -0300)]
x86: explicitly use edx in const delay function.

For x86_64, we can't just use %0, as it would
generate a mul against rdx, which is not really what we
want (note the ">> 32" in x86_64 version).

Using a u64 variable with a shift in i386 generates bad code,
so the solution is to explicitly use %%edx in inline assembly
for both.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use rdtscll in read_current_timer for i386.
Glauber Costa [Tue, 24 Jun 2008 12:52:36 +0000 (09:52 -0300)]
x86: use rdtscll in read_current_timer for i386.

This way we achieve the same code for both arches.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: provide delay loop for x86_64.
Glauber Costa [Tue, 24 Jun 2008 12:34:08 +0000 (09:34 -0300)]
x86: provide delay loop for x86_64.

This is for consistency with i386. We call use_tsc_delay()
at tsc initialization for x86_64, so we'll be always using it.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: don't use size specifiers.
Glauber Costa [Tue, 24 Jun 2008 12:27:19 +0000 (09:27 -0300)]
x86: don't use size specifiers.

Remove the "l" from inline asm at arch/x86/lib/delay_32.c.
It is not needed.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, uv: build fix #2 for "x86, uv: update x86 mmr list for SGI uv"
Ingo Molnar [Wed, 9 Jul 2008 06:02:54 +0000 (08:02 +0200)]
x86, uv: build fix #2 for "x86, uv: update x86 mmr list for SGI uv"

fix:

 In file included from arch/x86/kernel/tlb_uv.c:14:
 include/asm/uv/uv_mmrs.h:986: error: redefinition of ‘union uvh_rh_gam_cfg_overlay_config_mmr_u’
 include/asm/uv/uv_mmrs.h:988: error: redefinition of ‘struct uvh_rh_gam_cfg_overlay_config_mmr_s’
 include/asm/uv/uv_mmrs.h:1064: error: redefinition of ‘union uvh_rh_gam_mmioh_overlay_config_mmr_u’
 include/asm/uv/uv_mmrs.h:1066: error: redefinition of ‘struct uvh_rh_gam_mmioh_overlay_config_mmr_s’

caused by another duplicate section (cut & paste error) in commit
5d061e397db1 "x86, uv: update x86 mmr list for SGI uv".

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86, uv: build fix for "x86, uv: update x86 mmr list for SGI uv"
Ingo Molnar [Wed, 9 Jul 2008 06:00:15 +0000 (08:00 +0200)]
x86, uv: build fix for "x86, uv: update x86 mmr list for SGI uv"

fix:

In file included from arch/x86/kernel/genx2apic_uv_x.c:25:
include/asm/uv/uv_mmrs.h:986: error: redefinition of ‘union uvh_rh_gam_cfg_overlay_config_mmr_u’
include/asm/uv/uv_mmrs.h:988: error: redefinition of ‘struct uvh_rh_gam_cfg_overlay_config_mmr_s’
include/asm/uv/uv_mmrs.h:1064: error: redefinition of ‘union uvh_rh_gam_mmioh_overlay_config_mmr_u’
include/asm/uv/uv_mmrs.h:1066: error: redefinition of ‘struct uvh_rh_gam_mmioh_overlay_config_mmr_s’

caused by duplicate section (cut & paste error) in commit
5d061e397db1 "x86, uv: update x86 mmr list for SGI uv".

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoarch/x86/mm/pgtable_32.c: remove unused variable `fixmaps'
Andrew Morton [Fri, 4 Jul 2008 10:36:21 +0000 (12:36 +0200)]
arch/x86/mm/pgtable_32.c: remove unused variable `fixmaps'

arch/x86/mm/pgtable_32.c:144: warning: 'fixmaps' defined but not used

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoarch/x86/kernel/smpboot.c: fix warning
Andrew Morton [Fri, 4 Jul 2008 10:36:21 +0000 (12:36 +0200)]
arch/x86/kernel/smpboot.c: fix warning

arch/x86/kernel/smpboot.c: In function 'do_boot_cpu':
arch/x86/kernel/smpboot.c:943: warning: label 'restore_state' defined but not used

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: traps_xx: various small changes
Alexander van Heukelum [Tue, 1 Jul 2008 23:33:14 +0000 (01:33 +0200)]
x86: traps_xx: various small changes

 - order of local variable declarations
 - minor code changes

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: traps_xx: modify default_do_nmi
Alexander van Heukelum [Wed, 2 Jul 2008 16:39:01 +0000 (18:39 +0200)]
x86: traps_xx: modify default_do_nmi

 - local caching of smp_processor_id() in default_do_nmi()
 - v2: do not split default_do_nmi over two lines

On Wed, Jul 02, 2008 at 08:12:20PM +0400, Cyrill Gorcunov wrote:
> | -static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
> | +static notrace __kprobes void
> | +default_do_nmi(struct pt_regs *regs)
> | [ ... ]
> | -asmlinkage notrace  __kprobes void default_do_nmi(struct pt_regs *regs)
> | +asmlinkage notrace __kprobes void
> | +default_do_nmi(struct pt_regs *regs)
>
> Hi Alexander, good done, thanks! But why did you split default_do_nmi
> definition by two lines? I think it would be better to keep them as it
> was before, ie by a single line
>
>  static notrace __kprobes void default_do_nmi(struct pt_regs *regs)

Thanks! Here is the replacement patch with default_do_nmi left on
a single line.

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: traps_xx: restructure do_general_protection()
Alexander van Heukelum [Tue, 1 Jul 2008 23:32:04 +0000 (01:32 +0200)]
x86: traps_xx: restructure do_general_protection()

 - if (cond) block -> if (!cond) goto end_of_block
 - local caching of current

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: traps_xx: modify do_trap
Alexander van Heukelum [Tue, 1 Jul 2008 23:31:34 +0000 (01:31 +0200)]
x86: traps_xx: modify do_trap

if (cond) block -> if (!cond) goto end_of_block

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: traps_xx: modify __die
Alexander van Heukelum [Tue, 1 Jul 2008 23:31:03 +0000 (01:31 +0200)]
x86: traps_xx: modify __die

if (cond) block -> if (!cond) goto end_of_block

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: traps_xx: shuffle headers and globals
Alexander van Heukelum [Tue, 1 Jul 2008 23:30:30 +0000 (01:30 +0200)]
x86: traps_xx: shuffle headers and globals

Reorder headers and collect globals in traps_32.c and traps_64.c

Code size and data size are unaffected by the changes. Code
itself is changed due to different ordering of data and bss.
The bss segment changed size due to a change in the packing
of the variables.

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: initial changes to unify traps_32.c and traps_64.c
Alexander van Heukelum [Tue, 1 Jul 2008 23:29:44 +0000 (01:29 +0200)]
x86: initial changes to unify traps_32.c and traps_64.c

This patch does not change the generated object files.

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: rename paravirtualized TSC functions
Alok Kataria [Tue, 1 Jul 2008 18:43:36 +0000 (11:43 -0700)]
x86: rename paravirtualized TSC functions

Rename the paravirtualized calculate_cpu_khz to calibrate_tsc.
In all cases, we actually calibrate_tsc and use that as the cpu_khz value.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Dan Hecht <dhecht@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge tsc_init and clocksource code
Alok Kataria [Tue, 1 Jul 2008 18:43:34 +0000 (11:43 -0700)]
x86: merge tsc_init and clocksource code

Unify the clocksource code.
Unify the tsc_init code.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Dan Hecht <dhecht@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge the TSC cpu-freq code
Alok Kataria [Tue, 1 Jul 2008 18:43:31 +0000 (11:43 -0700)]
x86: merge the TSC cpu-freq code

Unify the TSC cpufreq code.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Dan Hecht <dhecht@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge tsc calibration
Alok Kataria [Tue, 1 Jul 2008 18:43:24 +0000 (11:43 -0700)]
x86: merge tsc calibration

Merge the tsc calibration code for the 32bit and 64bit kernel.
The paravirtualized calculate_cpu_khz for 64bit now points to the correct
tsc_calibrate code as in 32bit.
Original native_calculate_cpu_khz for 64 bit is now called as calibrate_cpu.

Also moved the recalibrate_cpu_khz function in the common file.
Note that this function is called only from powernow K7 cpu freq driver.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Dan Hecht <dhecht@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge sched_clock handling
Alok Kataria [Tue, 1 Jul 2008 18:43:18 +0000 (11:43 -0700)]
x86: merge sched_clock handling

Move the basic global variable definitions and sched_clock handling in the
common "tsc.c" file.

 - Unify notsc kernel command line handling for 32 bit and 64bit.
 - Functional changes for 64bit.
        - "tsc_disabled" is updated if "notsc" is passed at boottime.
        - Fallback to jiffies for sched_clock, incase notsc is passed on
  commandline.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Dan Hecht <dhecht@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: apic_32.c - add lapic resource
Cyrill Gorcunov [Tue, 1 Jul 2008 17:43:52 +0000 (21:43 +0400)]
x86: apic_32.c - add lapic resource

Add lapic resource into kernel resource map and mark it as busy

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
CC: Maciej W. Rozycki <macro@linux-mips.org>
16 years agox86, uv: update x86 mmr list for SGI uv
Dimitri Sivanich [Wed, 2 Jul 2008 20:39:35 +0000 (15:39 -0500)]
x86, uv: update x86 mmr list for SGI uv

This patch updates the X86 mmr list for SGI uv.

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Russ Anderson <rja@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: map UV chipset space - UV support
Jack Steiner [Tue, 1 Jul 2008 19:45:38 +0000 (14:45 -0500)]
x86: map UV chipset space - UV support

Create page table entries to map the SGI UV chipset GRU. local MMR &
global MMR ranges.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: map UV chipset space - pagetable
Jack Steiner [Tue, 1 Jul 2008 19:45:32 +0000 (14:45 -0500)]
x86: map UV chipset space - pagetable

Add boot-time function for creating additional 2MB page table entries for
mapping chipset specific cached/uncached ranges.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: let early_reserve_e820 update e820_saved too
Yinghai Lu [Thu, 3 Jul 2008 18:39:00 +0000 (11:39 -0700)]
x86: let early_reserve_e820 update e820_saved too

so when it is called after early_param, e820_saved get updated too.
esp for mpc update.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: make e820_saved have update from setup_data
Yinghai Lu [Thu, 3 Jul 2008 18:37:13 +0000 (11:37 -0700)]
x86: make e820_saved have update from setup_data

seperate reserve_setup_data into e820_reserved_setup_data,
and reserve_early_setup_data.

So could use e820_reserved_setup_data to backup e820 with setup_data.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Bernhard Walle <bwalle@suse.de>
Cc: Ying Huang <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: move saving e820_saved to setup_memory_map
Yinghai Lu [Thu, 3 Jul 2008 18:35:37 +0000 (11:35 -0700)]
x86: move saving e820_saved to setup_memory_map

so other path that will override memory_setup or
machine_specific_memory_setup could have e820_saved too.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use FIRMWARE_MEMMAP on x86/E820
Bernhard Walle [Fri, 27 Jun 2008 11:12:55 +0000 (13:12 +0200)]
x86: use FIRMWARE_MEMMAP on x86/E820

This patch uses the /sys/firmware/memmap interface provided in the last patch
on the x86 architecture when E820 is used. The patch copies the E820
memory map very early, and registers the E820 map afterwards via
firmware_map_add_early().

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Acked-by: Greg KH <gregkh@suse.de>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: kexec@lists.infradead.org
Cc: yhlu.kernel@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agosysfs: add /sys/firmware/memmap
Bernhard Walle [Fri, 27 Jun 2008 11:12:54 +0000 (13:12 +0200)]
sysfs: add /sys/firmware/memmap

This patch adds /sys/firmware/memmap interface that represents the BIOS
(or Firmware) provided memory map. The tree looks like:

    /sys/firmware/memmap/0/start   (hex number)
                           end     (hex number)
                           type    (string)
    ...                 /1/start
                           end
                           type

With the following shell snippet one can print the memory map in the same form
the kernel prints itself when booting on x86 (the E820 map).

  --------- 8< --------------------------
    #!/bin/sh
    cd /sys/firmware/memmap
    for dir in * ; do
        start=$(cat $dir/start)
        end=$(cat $dir/end)
        type=$(cat $dir/type)
        printf "%016x-%016x (%s)\n" $start $[ $end +1] "$type"
    done
  --------- >8 --------------------------

That patch only provides the needed interface:

 1. The sysfs interface.
 2. The structure and enumeration definition.
 3. The function firmware_map_add() and firmware_map_add_early()
    that should be called from architecture code (E820/EFI, for
    example) to add the contents to the interface.

If the kernel is compiled without CONFIG_FIRMWARE_MEMMAP, the interface does
nothing without cluttering the architecture-specific code with #ifdef's.

The purpose of the new interface is kexec: While /proc/iomem represents
the *used* memory map (e.g. modified via kernel parameters like 'memmap'
and 'mem'), the /sys/firmware/memmap tree represents the unmodified memory
map provided via the firmware. So kexec can:

 - use the original memory map for rebooting,
 - use the /proc/iomem for setting up the ELF core headers for kdump
   case that should only represent the memory of the system.

The patch has been tested on i386 and x86_64.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Acked-by: Greg KH <gregkh@suse.de>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: kexec@lists.infradead.org
Cc: yhlu.kernel@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: remove acpi_srat config v2
Yinghai Lu [Sun, 6 Jul 2008 18:42:11 +0000 (11:42 -0700)]
x86: remove acpi_srat config v2

use ACPI_NUMA directly

and move srat_32.c to mm/

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: remove have_arch_parse_srat -v2
Yinghai Lu [Sun, 6 Jul 2008 18:42:11 +0000 (11:42 -0700)]
x86: remove have_arch_parse_srat -v2

we already have the same srat handling interface for 32bit.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoprintk: export console_drivers
Ingo Molnar [Mon, 2 Jun 2008 11:19:08 +0000 (13:19 +0200)]
printk: export console_drivers

this symbol is needed by drivers/video/xen-fbfront.ko.

[ cherry-picked from tip/core/printk ]

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86/cpa: use an undefined PTE bit for testing CPA
Jeremy Fitzhardinge [Tue, 1 Jul 2008 23:46:37 +0000 (16:46 -0700)]
x86/cpa: use an undefined PTE bit for testing CPA

Rather than using _PAGE_GLOBAL - which not all CPUs support - to test
CPA, use one of the reserved-for-software-use PTE flags instead.  This
allows CPA testing to work on CPUs which don't support PGD.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_32: remove __PAGE_KERNEL(_EXEC)
Jeremy Fitzhardinge [Tue, 1 Jul 2008 23:46:36 +0000 (16:46 -0700)]
x86_32: remove __PAGE_KERNEL(_EXEC)
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Older x86-32 processors do not support global mappings (PGD), so must
only use it if the processor supports it.

The _PAGE_KERNEL* flags always have _PAGE_KERNEL set, since logically
we always want it set.

This is OK even on processors which do not support PGD, since all
_PAGE flags are masked with __supported_pte_mask before being turned
into a real in-pagetable pte.  On 32-bit systems, __supported_pte_mask
is initialized to not contain _PAGE_GLOBAL, and it is then added if
the CPU is found to support it.

The x86-32 code used to use __PAGE_KERNEL/__PAGE_KERNEL_EXEC for this
purpose, but they're now redundant and can be removed.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: always set _PAGE_GLOBAL in _PAGE_KERNEL* flags
Jeremy Fitzhardinge [Tue, 1 Jul 2008 23:46:35 +0000 (16:46 -0700)]
x86: always set _PAGE_GLOBAL in _PAGE_KERNEL* flags

Consistently set _PAGE_GLOBAL in _PAGE_KERNEL flags.  This makes 32-
and 64-bit code consistent, and removes some special cases where
__PAGE_KERNEL* did not have _PAGE_GLOBAL set, causing confusion as a
result of the inconsistencies.

This patch only affects x86-64, which generally always supports PGD.
The x86-32 patch is next.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64/setup: unconditionally populate the pgd
Jeremy Fitzhardinge [Tue, 1 Jul 2008 23:46:33 +0000 (16:46 -0700)]
x86_64/setup: unconditionally populate the pgd

When allocating a new pud, unconditionally populate the pgd (why did
we bother to create a new pud if we weren't going to populate it?).

This will only happen if the pgd slot was empty, since any existing
pud will be reused.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: fix "x86: let setup_arch call init_apic_mappings for 32bit"
Ingo Molnar [Fri, 4 Jul 2008 10:16:55 +0000 (12:16 +0200)]
x86: fix "x86: let setup_arch call init_apic_mappings for 32bit"

add back this line lost from trap_init():

        set_trap_gate(0,  &divide_error);

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: move prefill_possible_map calling early, fix
Ingo Molnar [Thu, 3 Jul 2008 13:57:47 +0000 (15:57 +0200)]
x86: move prefill_possible_map calling early, fix

fix:

arch/x86/kernel/built-in.o: In function `setup_arch':
: undefined reference to `prefill_possible_map'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: move prefill_possible_map calling early
Yinghai Lu [Thu, 3 Jul 2008 01:54:40 +0000 (18:54 -0700)]
x86: move prefill_possible_map calling early

call it right after we are done with MADT/mptable handling, instead of
doing that in setup_per_cpu_areas() later on...

this way for_possible_cpu() can be used early.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: move init_cpu_to_node after get_smp_config
Yinghai Lu [Thu, 3 Jul 2008 01:53:44 +0000 (18:53 -0700)]
x86: move init_cpu_to_node after get_smp_config

when acpi=off, cpu_to_apicid is ready after get_smp_config
so need to move init_cpu_to_node after it.

otherwise, we will get wrong cpu->node mapping, and it will rely on
amd_detect_cmp() to correct it - but that is too late as
setup_per_cpu_data is already called before that so  we will get
per_cpu_data on the wrong node.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: merge zones_sizes_init for numa and non numa on 32-bit
Yinghai Lu [Wed, 2 Jul 2008 07:31:02 +0000 (00:31 -0700)]
x86: merge zones_sizes_init for numa and non numa on 32-bit

move out e820_register_active_regions from non numa zones_sizes_init()
and remove numa version zones_sizes_init().

and let 32 bit call remove_all_active_ranges() in setup_arch() directly
like 64-bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: do not printout if we do not find setup_data
Yinghai Lu [Wed, 2 Jul 2008 03:04:10 +0000 (20:04 -0700)]
x86: do not printout if we do not find setup_data

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>