sfrench/cifs-2.6.git
14 years agoia64: on UP percpu variables are not small memory model
Ingo Molnar [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
ia64: on UP percpu variables are not small memory model

Tony says:

| The CONFIG_SMP=n path in ia64 makes quite radical changes ... rather
| than putting all the per-cpu stuff into the top 64K of address space
| and providing a per-cpu TLB mapping for that range to a different
| physical address ... it just makes all the per-cpu stuff link as ordinary
| variables in .data.

the new generic percpu code got confused about this as PER_CPU_ATTRIBUTES
was defined even on UP, so it picked up that small memory model - which
was not possible to get linked. The right fix is to only define that
on SMP. This resolved the build failures in my cross-compiling environment.

also link these variables into the .percpu section even on UP - some
assembly code has offset dependencies. (such as GET_IA64_MCA_DATA() in
arch/ia64/kernel/mca_asm.S)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Tony Luck <tony.luck@intel.com>
14 years agox86: fix arch/x86/kernel/test_nx.c modular build bug
Ingo Molnar [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
x86: fix arch/x86/kernel/test_nx.c modular build bug

fix this modular build bug:

>   CC [M]  arch/x86/kernel/test_nx.o
> {standard input}: Assembler messages:
> {standard input}:58: Error: cannot represent relocation type BFD_RELOC_64
> {standard input}:59: Error: cannot represent relocation type BFD_RELOC_64
> make[2]: *** [arch/x86/kernel/test_nx.o] Error 1
> make[1]: *** [arch/x86/kernel] Error 2

Reported-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agos390: use generic percpu linux-2.6.git
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
s390: use generic percpu linux-2.6.git

Change s390 percpu.h to use asm-generic/percpu.h

Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agoPOWERPC: use generic per cpu
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
POWERPC: use generic per cpu

Powerpc has a way to determine the address of the per cpu area of the
currently executing processor via the paca and the array of per cpu
offsets is avoided by looking up the per cpu area from the remote
paca's (copying x86_64).

Cc: Paul Mackerras <paulus@samba.org>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Olof Johansson <olof@lixom.net>
Tested-by: Geoff Levand <geoffrey.levand@am.sony.com>
14 years agoia64: use generic percpu
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
ia64: use generic percpu

ia64 has a special processor specific mapping that can be used to locate the
offset for the current per cpu area.

Cc: linux-ia64@vger.kernel.org
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agoSPARC64: use generic percpu
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
SPARC64: use generic percpu

Sparc64 has a way of providing the base address for the per cpu area of the
currently executing processor in a global register.

Sparc64 also provides a way to calculate the address of a per cpu area
from a base address instead of performing an array lookup.

Cc: David Miller <davem@davemloft.net>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agopercpu: change Kconfig to HAVE_SETUP_PER_CPU_AREA
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
percpu: change Kconfig to HAVE_SETUP_PER_CPU_AREA

Change:
config ARCH_SETS_UP_PER_CPU_AREA
to:
config HAVE_SETUP_PER_CPU_AREA

Cc: Andi Kleen <ak@suse.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: David Miller <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: linuxppc-dev@ozlabs.org
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agomodules: fold percpu_modcopy into module.c
travis@sgi.com [Wed, 30 Jan 2008 22:27:58 +0000 (23:27 +0100)]
modules: fold percpu_modcopy into module.c

percpu_modcopy() is defined multiple times in arch files. However, the only
user is module.c. Put a static definition into module.c and remove
the definitions from the arch files.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: export copy_from_user_ll_nocache[_nozero]
Andrew Morton [Wed, 30 Jan 2008 22:27:57 +0000 (23:27 +0100)]
x86: export copy_from_user_ll_nocache[_nozero]

Cc: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: fix duplicated TIF on 64-bit
Mathieu Desnoyers [Wed, 30 Jan 2008 22:27:57 +0000 (23:27 +0100)]
x86: fix duplicated TIF on 64-bit

commit 7e9916040b3020d0f36d68bb7512e3b80b623097
and commit eee3af4a2c83a97fff107ddc445d9df6fded9ce4

Both use the same TIF number (25) in thread_info_64.h.

This patch changes the TIF ids.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
Linus Torvalds [Wed, 30 Jan 2008 13:40:09 +0000 (00:40 +1100)]
Merge git://git./linux/kernel/git/x86/linux-2.6-x86

* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (890 commits)
  x86: fix nodemap_size according to nodeid bits
  x86: fix overlap between pagetable with bss section
  x86: add PCI IDs to k8topology_64.c
  x86: fix early_ioremap pagetable ops
  x86: use the same pgd_list for PAE and 64-bit
  x86: defer cr3 reload when doing pud_clear()
  x86: early boot debugging via FireWire (ohci1394_dma=early)
  x86: don't special-case pmd allocations as much
  x86: shrink some ifdefs in fault.c
  x86: ignore spurious faults
  x86: remove nx_enabled from fault.c
  x86: unify fault_32|64.c
  x86: unify fault_32|64.c with ifdefs
  x86: unify fault_32|64.c by ifdef'd function bodies
  x86: arch/x86/mm/init_32.c printk fixes
  x86: arch/x86/mm/init_32.c cleanup
  x86: arch/x86/mm/init_64.c printk fixes
  x86: unify ioremap
  x86: fixes some bugs about EFI memory map handling
  x86: use reboot_type on EFI 32
  ...

14 years ago[net] Gracefully handle shared e1000/1000e driver PCI ID's
Linus Torvalds [Wed, 30 Jan 2008 13:30:15 +0000 (00:30 +1100)]
[net] Gracefully handle shared e1000/1000e driver PCI ID's

Both the old e1000 driver and the new e1000e driver can drive some
PCI-Express e1000 cards, and we should avoid ambiguity about which
driver will pick up the support for those cards when both drivers are
enabled.

This solves the problem by having the old driver support those cards if
the new driver isn't configured, but otherwise ceding support for PCI
Express versions of the e1000 chipset to the newer driver.  Thus
allowing both legacy configurations where only the old driver is active
(and handles all chips it knows about) and the new configuration with
the new driver handling the more modern PCIE variants.

Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMake !NETFILTER_ADVANCED enable IP6_NF_MATCH_IPV6HEADER
Linus Torvalds [Wed, 30 Jan 2008 13:26:10 +0000 (00:26 +1100)]
Make !NETFILTER_ADVANCED enable IP6_NF_MATCH_IPV6HEADER

We want IPV6HEADER matching for the non-advanced default netfilter
configuration, since it's part of the standard netfilter setup of at
least some distributions (eg Fedora).

Otherwise NETFILTER_ADVANCED loses much of its point, since even
non-advanced users would have to enable all the advanced options just to
get a working IPv6 netfilter setup.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agox86: fix nodemap_size according to nodeid bits
Yinghai Lu [Wed, 30 Jan 2008 12:34:12 +0000 (13:34 +0100)]
x86: fix nodemap_size according to nodeid bits

memnode.map is s16 array because of nodeid is 16 bit now.

so need to increase the nodemap_size according to that bits.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix overlap between pagetable with bss section
Yinghai Lu [Wed, 30 Jan 2008 12:34:12 +0000 (13:34 +0100)]
x86: fix overlap between pagetable with bss section

one early crash on one 8 node 256g machine:

Command line: console=uart8250,io,0x3f8,115200n8 initrd=kernel.org/mydisk11_x86_64.gz rw root=/dev/ram0 debug initcall_debug apic=debug acpi.debug_level=0x0000000f pci=routeirq ip=dhcp load_ramdisk=1 ramdisk_size=131072 BOOT_IMAGE=kernel.org/bzImage_2.6.25_k8.1
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009bc00 (usable)
 BIOS-e820: 000000000009bc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e6000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 00000000dffe0000 (usable)
 BIOS-e820: 00000000dffe0000 - 00000000dffee000 (ACPI data)
 BIOS-e820: 00000000dffee000 - 00000000dffff050 (ACPI NVS)
 BIOS-e820: 00000000dffff050 - 00000000e0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000ff700000 - 0000000100000000 (reserved)
 BIOS-e820: 0000000100000000 - 0000004020000000 (usable)
Early serial console at I/O port 0x3f8 (options '115200n8')
console [uart0] enabled
end_pfn_map = 67239936
Kernel panic - not syncing: Duplicated early reservation d40000-e42000

Pid: 0, comm: swapper Not tainted 2.6.24-smp-g5a514e21-dirty #3

Call Trace:
 [<ffffffff80221545>] lapic_get_maxlvt+0x0/0x10
 [<ffffffff80221657>] clear_local_APIC+0x5/0xcf
 [<ffffffff80221726>] disable_local_APIC+0x5/0x17
 [<ffffffff8021fe16>] smp_send_stop+0x46/0x4c
 [<ffffffff80235293>] panic+0x94/0x13e
 [<ffffffff80bc3b03>] sctp_eps_proc_init+0x12/0x34
 [<ffffffff80b9f1c5>] reserve_early+0x30/0x6c
 [<ffffffff80803925>] init_memory_mapping+0x2cd/0x2dc
 [<ffffffff80b9dc01>] setup_arch+0x21f/0x44e
 [<ffffffff80b978be>] start_kernel+0x6f/0x2c7
 [<ffffffff80b971cc>] _sinittext+0x1cc/0x1d3

it turns out there is overlap between pgtable and bss...

in System.map we have
ffffffff80d40420 b rsi_table
ffffffff80d40620 B krb5_seq_lock
ffffffff80d40628 b i.20437
ffffffff80d40630 b xprt_rdma_inline_write_padding
ffffffff80d40638 b sunrpc_table_header
ffffffff80d40640 b zero
ffffffff80d40644 b min_memreg
ffffffff80d40648 b rpcrdma_tk_lock_g
ffffffff80d40650 B sctp_assocs_id_lock
ffffffff80d40658 B proc_net_sctp
ffffffff80d40660 B sctp_assocs_id
ffffffff80d40680 B sysctl_sctp_mem
ffffffff80d40690 B sysctl_sctp_rmem
ffffffff80d406a0 B sysctl_sctp_wmem
ffffffff80d406b0 b sctp_ctl_socket
ffffffff80d406b8 b sctp_pf_inet6_specific
ffffffff80d406c0 b sctp_pf_inet_specific
ffffffff80d406c8 b sctp_af_v4_specific
ffffffff80d406d0 b sctp_af_v6_specific
ffffffff80d406d8 b sctp_rand.33270
ffffffff80d406dc b sctp_memory_pressure
ffffffff80d406e0 b sctp_sockets_allocated
ffffffff80d406e4 b sctp_memory_allocated
ffffffff80d406e8 b sctp_sysctl_header
ffffffff80d406f0 b zero
ffffffff80d406f4 A __bss_stop
ffffffff80d406f4 A _end

need to round up table_start to PAGE_SIZE.

also make the panic more informative.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: add PCI IDs to k8topology_64.c
Joachim Deguara [Wed, 30 Jan 2008 12:34:12 +0000 (13:34 +0100)]
x86: add PCI IDs to k8topology_64.c

This just adds the PCI IDs of AMD's family 10h and 11h CPU's northbridges to
k8topology discovery.

Signed-off-by: Joachim Deguara <joachim.deguara@amd.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix early_ioremap pagetable ops
Jeremy Fitzhardinge [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: fix early_ioremap pagetable ops

Put appropriate pagetable update hooks in so that paravirt knows
what's going on in there.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: use the same pgd_list for PAE and 64-bit
Jeremy Fitzhardinge [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: use the same pgd_list for PAE and 64-bit

Use a standard list threaded through page->lru for maintaining the pgd
list on PAE.  This is the same as 64-bit, and seems saner than using a
non-standard list via page->index.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: defer cr3 reload when doing pud_clear()
Jeremy Fitzhardinge [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: defer cr3 reload when doing pud_clear()

PAE mode requires that we reload cr3 in order to guarantee that
changes to the pgd will be noticed by the processor.  This means that
in principle pud_clear needs to reload cr3 every time.  However,
because reloading cr3 implies a tlb flush, we want to avoid it where
possible.

pud_clear() is only used in a couple of places:
 - in free_pmd_range(), when pulling down a range of process address space, and
 - huge_pmd_unshare()

In both cases, the calling code will do a a tlb flush anyway, so
there's no need to do it within pud_clear().

In free_pmd_range(), the pud_clear is immediately followed by
pmd_free_tlb(); we can hook that to make the mmu_gather do an
unconditional full flush to make sure cr3 gets reloaded.

In huge_pmd_unshare, it is followed by flush_tlb_range, which always
results in a full cr3-reload tlb flush.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: William Irwin <wli@holomorphy.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: early boot debugging via FireWire (ohci1394_dma=early)
Bernhard Kaindl [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: early boot debugging via FireWire (ohci1394_dma=early)

This patch adds a new configuration option, which adds support for a new
early_param which gets checked in arch/x86/kernel/setup_{32,64}.c:setup_arch()
to decide wether OHCI-1394 FireWire controllers should be initialized and
enabled for physical DMA access to allow remote debugging of early problems
like issues ACPI or other subsystems which are executed very early.

If the config option is not enabled, no code is changed, and if the boot
paramenter is not given, no new code is executed, and independent of that,
all new code is freed after boot, so the config option can be even enabled
in standard, non-debug kernels.

With specialized tools, it is then possible to get debugging information
from machines which have no serial ports (notebooks) such as the printk
buffer contents, or any data which can be referenced from global pointers,
if it is stored below the 4GB limit and even memory dumps of of the physical
RAM region below the 4GB limit can be taken without any cooperation from the
CPU of the host, so the machine can be crashed early, it does not matter.

In the extreme, even kernel debuggers can be accessed in this way. I wrote
a small kgdb module and an accompanying gdb stub for FireWire which allows
to gdb to talk to kgdb using remote remory reads and writes over FireWire.

An version of the gdb stub fore FireWire is able to read all global data
from a system which is running a a normal kernel without any kernel debugger,
without any interruption or support of the system's CPU. That way, e.g. the
task struct and so on can be read and even manipulated when the physical DMA
access is granted.

A HOWTO is included in this patch, in Documentation/debugging-via-ohci1394.txt
and I've put a copy online at
ftp://ftp.suse.de/private/bk/firewire/docs/debugging-via-ohci1394.txt

It also has links to all the tools which are available to make use of it
another copy of it is online at:
ftp://ftp.suse.de/private/bk/firewire/kernel/ohci1394_dma_early-v2.diff

Signed-Off-By: Bernhard Kaindl <bk@suse.de>
Tested-By: Thomas Renninger <trenn@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: don't special-case pmd allocations as much
Jeremy Fitzhardinge [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: don't special-case pmd allocations as much

In x86 PAE mode, stop treating pmds as a special case.  Previously
they were always allocated and freed with the pgd.  The modifies the
code to be the same as 64-bit mode, where they are allocated on
demand.

This is a step on the way to unifying 32/64-bit pagetable allocation
as much as possible.

There is a complicating wart, however.  When you install a new
reference to a pmd in the pgd, the processor isn't guaranteed to see
it unless you reload cr3.  Since reloading cr3 also has the
side-effect of flushing the tlb, this is an expense that we want to
avoid whereever possible.

This patch simply avoids reloading cr3 unless the update is to the
current pagetable.  Later patches will optimise this further.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: William Irwin <wli@holomorphy.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: shrink some ifdefs in fault.c
Harvey Harrison [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: shrink some ifdefs in fault.c

The change from current to tsk in do_page_fault is safe as
this is set at the very beginning of the function.

Removes a likely() annotation from the 64-bit version, this
could have instead been added to 32-bit.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: ignore spurious faults
Jeremy Fitzhardinge [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: ignore spurious faults

When changing a kernel page from RO->RW, it's OK to leave stale TLB
entries around, since doing a global flush is expensive and they pose
no security problem.  They can, however, generate a spurious fault,
which we should catch and simply return from (which will have the
side-effect of reloading the TLB to the current PTE).

This can occur when running under Xen, because it frequently changes
kernel pages from RW->RO->RW to implement Xen's pagetable semantics.
It could also occur when using CONFIG_DEBUG_PAGEALLOC, since it avoids
doing a global TLB flush after changing page permissions.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: remove nx_enabled from fault.c
Harvey Harrison [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: remove nx_enabled from fault.c

On !PAE 32-bit, _PAGE_NX will be 0, making is_prefetch always
return early.  The test is sufficient on PAE as __supported_pte_mask
is updated in the same places as nx_enabled in init_32.c which also
takes disable_nx into account.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: unify fault_32|64.c
Harvey Harrison [Wed, 30 Jan 2008 12:34:11 +0000 (13:34 +0100)]
x86: unify fault_32|64.c

Unify includes in moved fault.c.

Modify Makefiles to pick up unified file.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: unify fault_32|64.c with ifdefs
Harvey Harrison [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: unify fault_32|64.c with ifdefs

Elimination of these ifdefs can be done in a unified file.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: unify fault_32|64.c by ifdef'd function bodies
Harvey Harrison [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: unify fault_32|64.c by ifdef'd function bodies

It's about time to get on with unifying these files, elimination
of the ugly ifdefs can occur in the unified file.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: arch/x86/mm/init_32.c printk fixes
Ingo Molnar [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: arch/x86/mm/init_32.c printk fixes

printk fixes. NOP in terms of functionality, but strings got
a bit larger due to the KERN_ markers that were added.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: arch/x86/mm/init_32.c cleanup
Ingo Molnar [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: arch/x86/mm/init_32.c cleanup

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: arch/x86/mm/init_64.c printk fixes
Ingo Molnar [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: arch/x86/mm/init_64.c printk fixes

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: unify ioremap
Thomas Gleixner [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: unify ioremap

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fixes some bugs about EFI memory map handling
Huang, Ying [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: fixes some bugs about EFI memory map handling

This patch fixes some bugs of EFI memory handing code.

- On x86_64, it is possible that EFI memory map can not be mapped via
  identity map, so efi_map_memmap is removed, just use early_ioremap.

- On i386, the EFI memory map mapping take effect cross paging_init,
  so it is not necessary to use efi_map_memmap.

- EFI memory map is unmapped in efi_enter_virtual_mode to avoid
  early_ioremap leak.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: use reboot_type on EFI 32
Huang, Ying [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: use reboot_type on EFI 32

This patch makes reboot_type of BOOT_EFI is used on i386 too. Because
correpsonding reboot code of i386 and x86_64 is merged.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: unify page fault oops printing
Harvey Harrison [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: unify page fault oops printing

This changes the oops dumping format for page faults to
be similar between X86_32 and 64.

This is the first user of printk_address on X86_32.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: introduce show_fault_oops helper to fault_32|64.c
Harvey Harrison [Wed, 30 Jan 2008 12:34:10 +0000 (13:34 +0100)]
x86: introduce show_fault_oops helper to fault_32|64.c

This will help when unifying the oops dumping code on 32/64
bit.  No functional changes.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: add is_errata100 helper to fault_32|64.c
Harvey Harrison [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: add is_errata100 helper to fault_32|64.c

Further towards unifying these files, add another helper
in same spirit as is_errata93.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: add is_f00f_bug helper to fault_32|64.c
Harvey Harrison [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: add is_f00f_bug helper to fault_32|64.c

Further towards unifying these files, add another helper
in same spirit as is_errata93.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: make ioremap() UC by default
Ingo Molnar [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: make ioremap() UC by default

Yes! A mere 120 c_p_a() fixing and rewriting patches later,
we are now confident that we can enable UC by default for
ioremap(), on x86 too.

Every other architectures was doing this already. Doing so
makes Linux more robust against MTRR mixups (which might go
unnoticed if BIOS writers test other OSs only - where PAT
might override bad MTRRs defaults).

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa cleanup the 64-bit alias math
Thomas Gleixner [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: cpa cleanup the 64-bit alias math

Cleanup the address calculations, which are necessary to identify the
high/low alias mappings of the kernel on 64 bit machines. Instead of
calling __pa/__va back and forth, calculate the physical address once
and base the other calculations on it. Add understandable constants so
we can use the already available within() helper. Also add comments,
which help mere mortals to understand what this code does.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cpa: fix the self-test
Ingo Molnar [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: cpa: fix the self-test

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: rodata config hookup
Ingo Molnar [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: rodata config hookup

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: enable CONFIG_DEBUG_PAGEALLOC more widely
Ingo Molnar [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: enable CONFIG_DEBUG_PAGEALLOC more widely

make CONFIG_DEBUG_PAGEALLOC universally available.

CONFIG_HIBERNATION and CONFIG_HUGETLBFS was disabling it, for no
particular reason.

If there are any unfixed bugs here we'll fix it, but do not disable
vital debugging facilities like that ..

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: init memory debugging
Ingo Molnar [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: init memory debugging

debug incorrect/late access to init memory, by permanently unmapping
the init memory ranges. Depends on CONFIG_DEBUG_PAGEALLOC=y.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: move misplaced rodata check call
Arjan van de Ven [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: move misplaced rodata check call

It looks like a mismerge put the rodata self-check in the wrong spot; move
it to the right place after marking the .rodata section read only.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix clflush_page_range logic
Ingo Molnar [Wed, 30 Jan 2008 12:34:09 +0000 (13:34 +0100)]
x86: fix clflush_page_range logic

only present ptes must be flushed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: optimize clflush
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: optimize clflush

clflush is sufficient to be issued on one CPU. The invalidation is
broadcast throughout the coherence domain.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: clflush_page_range needs mfence
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: clflush_page_range needs mfence

clflush is an unordered operation with respect to other memory
traffic, including other CLFLUSH instructions. This needs proper
fencing with mfence.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cpa: rename global_flush_tlb() to cpa_flush_all()
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: cpa: rename global_flush_tlb() to cpa_flush_all()

The function name global_flush_tlb() suggests something different from
what the function really does. Rename it to cpa_flush_all(), which is an
understandable counterpart to cpa_flush_range().

no global visibility of the old API anymore.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cpa: implement clflush optimization
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: cpa: implement clflush optimization

Use clflush on CPUs which support this.

clflush is only used when the page attribute operation has been
successful. On CPUs which do not support clflush and in the case of
error the old fashioned global_flush_tlb() is called.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cpa use the new set_clr function
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: cpa use the new set_clr function

Convert cpa_set and cpa_clear to call the new set_clr function.
Seperate out the debug helpers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cpa create set_and_clr function
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: cpa create set_and_clr function

Create a set_and_clr function to avoid the duplicate loops. Allows
also to do combined operations for optimization.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cpa move the flush into set and clear functions
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: cpa move the flush into set and clear functions

To avoid the modification of the flush code for the clflush
implementation, move the flush into the set and clear functions and
provide helper functions for the debugging code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: add testcases for RODATA and NX protections/attributes
Arjan van de Ven [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: add testcases for RODATA and NX protections/attributes

Latest update; I now have 4 NX tests, but 2 fail so they're #if 0'd.
I also cleaned up the NX test code quite a bit, and got rid of the ugly
exception table sorting stuff.

From: Arjan van de Ven <arjan@linux.intel.com>

This patch adds testcases for the CONFIG_DEBUG_RODATA configuration option
as well as the NX CPU feature/mappings. Both testcases can move to tests/
once that patch gets merged into mainline.
(I'm half considering moving the rodata test into mm/init.c but I'll
wait with that until init.c is unified)

As part of this I had to fix a not-quite-right alignment in the vmlinux.lds.h
for the RODATA sections, which lead to 1 page less being marked read only.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: ioremap KERN_INFO
Ingo Molnar [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: ioremap KERN_INFO

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa: clean up change_page_attr_set/clear()
Thomas Gleixner [Wed, 30 Jan 2008 12:34:08 +0000 (13:34 +0100)]
x86: cpa: clean up change_page_attr_set/clear()

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa: fix loop
Ingo Molnar [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: cpa: fix loop

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa: fix split thinko
Thomas Gleixner [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: cpa: fix split thinko

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: make sure initmem is writable
Arjan van de Ven [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: make sure initmem is writable

When we free initmem, various rodata and CPA checks may have left
memory read only.. this patch ensures that the memory is writable
before we free it.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix pageattr-selftest
Arjan van de Ven [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: fix pageattr-selftest

In Ingo's testing, he found a bug in the CPA selftest code. What would
happen is that the test would call change_page_attr_addr on a range of
memory, part of which was read only, part of which was writable. The
only thing the test wanted to change was the global bit...

What actually happened was that the selftest would take the permissions
of the first page, and then the change_page_attr_addr call would then
set the permissions of the entire range to this first page. In the
rodata section case, this resulted in pages after the .rodata becoming
read only... which made the kernel rather unhappy in many interesting
ways.

This is just another example of how dangerous the cpa API is (was); this
patch changes the test to use the incremental clear/set APIs
instead, and it changes the clear/set implementation to work on a 1 page
at a time basis.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: remove flush_agp_mappings()
Ingo Molnar [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: remove flush_agp_mappings()

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa: move flush to cpa
Thomas Gleixner [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: cpa: move flush to cpa

The set_memory_* and set_pages_* family of API's currently requires the
callers to do a global tlb flush after the function call; forgetting this is
a very nasty deathtrap. This patch moves the global tlb flush into
each of the callers

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: make various pageattr.c functions static
Arjan van de Ven [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: make various pageattr.c functions static

change_page_attr_add is only used in pageattr.c now, so we can
make this function static.
change_page_attr() isn't used anywere at all anymore; this function
is a really bad API anyway so just remove the bloat entirely.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa: set_memory_notpresent()
Ingo Molnar [Wed, 30 Jan 2008 12:34:07 +0000 (13:34 +0100)]
x86: cpa: set_memory_notpresent()

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa: convert ioremap to new API
Thomas Gleixner [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: cpa: convert ioremap to new API

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix ioremap API
Thomas Gleixner [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: fix ioremap API

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix ioremap RAM check
Thomas Gleixner [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: fix ioremap RAM check

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix the missing BIOS area check in page_is_ram
Thomas Gleixner [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: fix the missing BIOS area check in page_is_ram

page_is_ram has a FIXME since ages, which reminds to sanity check the
BIOS area between 640k and 1M, which is sometimes falsely reported as
RAM in the e820 tables.

Implement the sanity check. Move the BIOS range defines from
pageattr.c into e820.h to avoid duplicate defines.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: move page_is_ram() function
Thomas Gleixner [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: move page_is_ram() function

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: deprecate change_page_attr() for drivers
Arjan van de Ven [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: deprecate change_page_attr() for drivers

With the introduction of the new API, no driver or non-archcore code needs
to use c-p-a anymore, so this patch also deprecates the EXPORT_SYMBOL of CPA
(it's a horrible API after all).

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: convert CPA users to the new set_page_ API
Arjan van de Ven [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: convert CPA users to the new set_page_ API

This patch converts various users of change_page_attr() to the new,
more intent driven set_page_*/set_memory_* API set.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: a new API for drivers/etc to control cache and other page attributes
Arjan van de Ven [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: a new API for drivers/etc to control cache and other page attributes

Right now, if drivers or other code want to change, say, a cache attribute of a
page, the only API they have is change_page_attr(). c-p-a is a really bad API
for this, because it forces the caller to know *ALL* the attributes he wants
for the page, not just the 1 thing he wants to change. So code that wants to
set a page uncachable, needs to be aware of the NX status as well etc etc etc.

This patch introduces a set of new APIs for this, set_pages_<attr> and
set_memory_<attr>, that offer a logical change to the user, and leave all
attributes not implied by the requested logical change alone.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cpa: move clflush_cache_range()
Ingo Molnar [Wed, 30 Jan 2008 12:34:06 +0000 (13:34 +0100)]
x86: cpa: move clflush_cache_range()

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: unify ioremap_32 and _64
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: unify ioremap_32 and _64

Unify the now identical ioremap_32.c and ioremap_64.c into the
same ioremap.c file. No code changed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: unify ioremap
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: unify ioremap

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: use remove_vm_are in ioremap_32 error path
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: use remove_vm_are in ioremap_32 error path

When ioremap_page_range fails, then we can use remove_vm_area instead
of vunmap safely.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: __iomem annotations
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: __iomem annotations

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: switch to change_page_attr_addr in ioremap_32.c
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: switch to change_page_attr_addr in ioremap_32.c

Use change_page_attr_addr() instead of change_page_attr(), which
simplifies the code significantly and matches the 64bit
implementation.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: make c_p_a unconditional in ioremap
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: make c_p_a unconditional in ioremap

Make c_p_a unconditional for ioremap and iounmap. This ensures
complete consistency of the flags which are handed to
ioremap_page_range and the real flags in the mappings.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: introduce max_pfn_mapped
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: introduce max_pfn_mapped

64bit uses end_pfn_map and 32bit uses max_low_pfn. There are several
files which have #ifdef'ed defines which map either to end_pfn_map or
max_low_pfn. Replace this by a universal define and clean up all the
other instances.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: cleanup ioremap includes
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: cleanup ioremap includes

Get rid of the douplicate define of ISA_START/END_ADDRESS and use the
same headers in 32 and 64 bit code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: style cleanup of ioremap code
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: style cleanup of ioremap code

Fix the coding style before going further.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: fix ioremap pgprot inconsistency
Thomas Gleixner [Wed, 30 Jan 2008 12:34:05 +0000 (13:34 +0100)]
x86: fix ioremap pgprot inconsistency

The pgprot flags which are handed into ioremap_page_range() are
different to those which are set in change_page_attr(). The
ioremap_page_range flags are executable, while the c_p_a flags are
not.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: fix ioremap pgprot inconsistency
Thomas Gleixner [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: fix ioremap pgprot inconsistency

The pgprot flags which are handed into ioremap_page_range() are
different to those which are set in change_page_attr(). The
ioremap_page_range flags are executable, while the c_p_a flags are
not. Also make the mappings global (which is a NOP currently on 32bit,
although CPUs from PPRO+ onwards support it, but that's a separate
fix.)

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
14 years agox86: turn the check_exec function into function that
Arjan van de Ven [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: turn the check_exec function into function that

What the check_exec() function really is trying to do is enforce certain
bits in the pgprot that are required by the x86 architecture, but that
callers might not be aware of (such as NX bit exclusion of the BIOS
area for BIOS based PCI access; it's not uncommon to ioremap the BIOS
region for various purposes and normally ioremap() memory has the NX bit
set).

This patch turns the check_exec() function into static_protections()
which also is now used to make sure the kernel text area remains non-NX
and that the .rodata section remains read-only. If the architecture
ends up requiring more such mandatory prot settings for specific areas,
this is now a reasonable place to add these.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: cpa: make self-test depend on DEBUG_KERNEL
Ingo Molnar [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: cpa: make self-test depend on DEBUG_KERNEL

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: ioremap_nocache fix
Huang, Ying [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: ioremap_nocache fix

This patch fixes a bug of ioremap_nocache. ioremap_nocache() will call
__ioremap() with flags != 0 to do the real work, which will call
change_page_attr_addr() if phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT).
But some pages between 0 ~ end_pfn_map << PAGE_SHIFT are not mapped by
identity map, this will make change_page_attr_addr failed.

This patch is based on latest x86 git and has been tested on x86_64 platform.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: add PAGE_KERNEL_EXEC_NOCACHE
Ingo Molnar [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: add PAGE_KERNEL_EXEC_NOCACHE

add PAGE_KERNEL_EXEC_NOCACHE.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: fix NX bit handling in change_page_attr()
Huang, Ying [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: fix NX bit handling in change_page_attr()

This patch fixes a bug of change_page_attr/change_page_attr_addr on
Intel i386/x86_64 CPUs.  After changing page attribute to be
executable with these functions, the page remains un-executable on
Intel i386/x86_64 CPU.  Because on Intel i386/x86_64 CPU, only if the
"NX" bits of all three level page tables are cleared (PAE is enabled),
the corresponding page is executable (refer to section 4.13.2 of Intel
64 and IA-32 Architectures Software Developer's Manual).  So, the bug
is fixed through clearing the "NX" bit of PMD when splitting the huge
PMD.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: change cpa to pfn based
Ingo Molnar [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: change cpa to pfn based

change CPA to pfn based.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: keep the BIOS area executable
Ingo Molnar [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: keep the BIOS area executable

keep the BIOS area executable.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: add PG_LEVEL enum
Thomas Gleixner [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: add PG_LEVEL enum

this way PG_LEVEL_1GB will be an easy change.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: clean up lookup_address() declarations
Thomas Gleixner [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: clean up lookup_address() declarations

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: clean up arch/x86/mm/pageattr.c
Ingo Molnar [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
x86: clean up arch/x86/mm/pageattr.c

do some leftover cleanups in the now unified arch/x86/mm/pageattr.c
file.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: re-add clflush_cache_range()
Ingo Molnar [Wed, 30 Jan 2008 12:34:03 +0000 (13:34 +0100)]
x86: re-add clflush_cache_range()

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: unify pageattr_32.c and pageattr_64.c
Ingo Molnar [Wed, 30 Jan 2008 12:34:03 +0000 (13:34 +0100)]
x86: unify pageattr_32.c and pageattr_64.c

unify the now perfectly identical pageattr_32/64.c files - no code changed.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: prepare for pageattr.c unification
Ingo Molnar [Wed, 30 Jan 2008 12:34:03 +0000 (13:34 +0100)]
x86: prepare for pageattr.c unification

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: backmerge 64-bit details into 32-bit pageattr.c
Ingo Molnar [Wed, 30 Jan 2008 12:34:03 +0000 (13:34 +0100)]
x86: backmerge 64-bit details into 32-bit pageattr.c

backmerge 64-bit details into 32-bit pageattr.c.

the pageattr_32.c and pageattr_64.c files are now identical.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: enable DEBUG_PAGEALLOC on 64-bit
Ingo Molnar [Wed, 30 Jan 2008 12:34:03 +0000 (13:34 +0100)]
x86: enable DEBUG_PAGEALLOC on 64-bit

enable CONFIG_DEBUG_PAGEALLOC=y on 64-bit kernels too.

preliminary testing shows that it's working fine.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: add kernel_map_pages() to 64-bit
Ingo Molnar [Wed, 30 Jan 2008 12:34:03 +0000 (13:34 +0100)]
x86: add kernel_map_pages() to 64-bit

needed for DEBUG_PAGEALLOC support and for unification.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
14 years agox86: return -EINVAL in __change_page_attr(), instead of 0
Ingo Molnar [Wed, 30 Jan 2008 12:34:03 +0000 (13:34 +0100)]
x86: return -EINVAL in __change_page_attr(), instead of 0

careful: might change driver behavior - but this is the right
return value.

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