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2008-04-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-bootmem-v3 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-bootmem-v3: x86_64/mm: check and print vmemmap allocation continuous x86_64: fix setup_node_bootmem to support big mem excluding with memmap x86_64: make reserve_bootmem_generic() use new reserve_bootmem() mm: allow reserve_bootmem() cross nodes mm: offset align in alloc_bootmem() mm: fix alloc_bootmem_core to use fast searching for all nodes mm: make mem_map allocation continuous
2008-04-26x86_64: fix setup_node_bootmem to support big mem excluding with memmapYinghai Lu
typical case: four sockets system, every node has 4g ram, and we are using: memmap=10g$4g to mask out memory on node1 and node2 when numa is enabled, early_node_mem is used to get node_data and node_bootmap. if it can not get memory from the same node with find_e820_area(), it will use alloc_bootmem to get buff from previous nodes. so check it and print out some info about it. need to move early_res_to_bootmem into every setup_node_bootmem. and it takes range that node has. otherwise alloc_bootmem could return addr that reserved early. depends on "mm: make reserve_bootmem can crossed the nodes". Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-generic-bitops-v3 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-generic-bitops-v3: x86, bitops: select the generic bitmap search functions x86: include/asm-x86/pgalloc.h/bitops.h: checkpatch cleanups - formatting only x86: finalize bitops unification x86, UML: remove x86-specific implementations of find_first_bit x86: optimize find_first_bit for small bitmaps x86: switch 64-bit to generic find_first_bit x86: generic versions of find_first_(zero_)bit, convert i386 bitops: use __fls for fls64 on 64-bit archs generic: implement __fls on all 64-bit archs generic: introduce a generic __fls implementation x86: merge the simple bitops and move them to bitops.h x86, generic: optimize find_next_(zero_)bit for small constant-size bitmaps x86, uml: fix uml with generic find_next_bit for x86 x86: change x86 to use generic find_next_bit uml: Kconfig cleanup uml: fix build error
2008-04-26x86, boot: add linked list of struct setup_dataHuang, Ying
This patch adds a field of 64-bit physical pointer to NULL terminated single linked list of struct setup_data to real-mode kernel header. This is used as a more extensible boot parameters passing mechanism. 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>
2008-04-26x86, boot: add free_early to early reservation machanismHuang, Ying
Add free_early to early reservation mechanism - this way early bootup failure paths can stop wasting memory. 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>
2008-04-26x86: include/asm-x86/pgalloc.h/bitops.h: checkpatch cleanups - formatting onlyJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: finalize bitops unificationAlexander van Heukelum
include/asm-x86/bitops_32.h and include/asm-x86/bitops_64.h are now almost identical. The 64-bit version sets ARCH_HAS_FAST_MULTIPLIER and has an extra inline function set_bit_string. The define currently has no influence on the generated code, but it can be argued that setting it on i386 is the right thing to do anyhow. The addition of the extra inline function on i386 does not hurt either. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86, UML: remove x86-specific implementations of find_first_bitAlexander van Heukelum
x86 has been switched to the generic versions of find_first_bit and find_first_zero_bit, but the original versions were retained. This patch just removes the now unused x86-specific versions. also update UML. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: switch 64-bit to generic find_first_bitAlexander van Heukelum
Switch x86_64 to generic find_first_bit. The x86_64-specific implementation is not removed. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: generic versions of find_first_(zero_)bit, convert i386Alexander van Heukelum
Generic versions of __find_first_bit and __find_first_zero_bit are introduced as simplified versions of __find_next_bit and __find_next_zero_bit. Their compilation and use are guarded by a new config variable GENERIC_FIND_FIRST_BIT. The generic versions of find_first_bit and find_first_zero_bit are implemented in terms of the newly introduced __find_first_bit and __find_first_zero_bit. This patch does not remove the i386-specific implementation, but it does switch i386 to use the generic functions by setting GENERIC_FIND_FIRST_BIT=y for X86_32. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26bitops: use __fls for fls64 on 64-bit archsAlexander van Heukelum
Use __fls for fls64 on 64-bit archs. The implementation for 64-bit archs is moved from x86_64 to asm-generic. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: merge the simple bitops and move them to bitops.hAlexander van Heukelum
Some of those can be written in such a way that the same inline assembly can be used to generate both 32 bit and 64 bit code. For ffs and fls, x86_64 unconditionally used the cmov instruction and i386 unconditionally used a conditional branch over a mov instruction. In the current patch I chose to select the version based on the availability of the cmov instruction instead. A small detail here is that x86_64 did not previously set CONFIG_X86_CMOV=y. Improved comments for ffs, ffz, fls and variations. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86, generic: optimize find_next_(zero_)bit for small constant-size bitmapsAlexander van Heukelum
This moves an optimization for searching constant-sized small bitmaps form x86_64-specific to generic code. On an i386 defconfig (the x86#testing one), the size of vmlinux hardly changes with this applied. I have observed only four places where this optimization avoids a call into find_next_bit: In the functions return_unused_surplus_pages, alloc_fresh_huge_page, and adjust_pool_surplus, this patch avoids a call for a 1-bit bitmap. In __next_cpu a call is avoided for a 32-bit bitmap. That's it. On x86_64, 52 locations are optimized with a minimal increase in code size: Current #testing defconfig: 146 x bsf, 27 x find_next_*bit text data bss dec hex filename 5392637 846592 724424 6963653 6a41c5 vmlinux After removing the x86_64 specific optimization for find_next_*bit: 94 x bsf, 79 x find_next_*bit text data bss dec hex filename 5392358 846592 724424 6963374 6a40ae vmlinux After this patch (making the optimization generic): 146 x bsf, 27 x find_next_*bit text data bss dec hex filename 5392396 846592 724424 6963412 6a40d4 vmlinux [ tglx@linutronix.de: build fixes ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: change x86 to use generic find_next_bitAlexander van Heukelum
The versions with inline assembly are in fact slower on the machines I tested them on (in userspace) (Athlon XP 2800+, p4-like Xeon 2.8GHz, AMD Opteron 270). The i386-version needed a fix similar to 06024f21 to avoid crashing the benchmark. Benchmark using: gcc -fomit-frame-pointer -Os. For each bitmap size 1...512, for each possible bitmap with one bit set, for each possible offset: find the position of the first bit starting at offset. If you follow ;). Times include setup of the bitmap and checking of the results. Athlon Xeon Opteron 32/64bit x86-specific: 0m3.692s 0m2.820s 0m3.196s / 0m2.480s generic: 0m2.622s 0m1.662s 0m2.100s / 0m1.572s If the bitmap size is not a multiple of BITS_PER_LONG, and no set (cleared) bit is found, find_next_bit (find_next_zero_bit) returns a value outside of the range [0, size]. The generic version always returns exactly size. The generic version also uses unsigned long everywhere, while the x86 versions use a mishmash of int, unsigned (int), long and unsigned long. Using the generic version does give a slightly bigger kernel, though. defconfig: text data bss dec hex filename x86-specific: 4738555 481232 626688 5846475 5935cb vmlinux (32 bit) generic: 4738621 481232 626688 5846541 59360d vmlinux (32 bit) x86-specific: 5392395 846568 724424 6963387 6a40bb vmlinux (64 bit) generic: 5392458 846568 724424 6963450 6a40fa vmlinux (64 bit) Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: section mismatch fixes, #2Jacek Luczak
This patch fixes section mismatch warnings in smpboot_setup_io_apic(). WARNING: arch/x86/kernel/built-in.o(.text+0x11781): Section mismatch in reference from the function smpboot_setup_io_apic() to the function .init.text:setup_IO_APIC() The function smpboot_setup_io_apic() references the function __init setup_IO_APIC(). This is often because smpboot_setup_io_apic lacks a __init annotation or the annotation of setup_IO_APIC is wrong. Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-26x86: pgtable_32.h - prototype and section mismatch fixesJacek Luczak
This patch adds extern to native_pagetable_setup_[start,done]() protypes and fixes following section mismatch warning: WARNING: arch/x86/mm/built-in.o(.text+0xf2): Section mismatch in reference from the function paravirt_pagetable_setup_start() paravirt_pagetable_setup_[start,done]() is used by __init pagetable_init(). Annotate both functions with __init. Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-26x86: remove duplicate get_bios_ebda() from rio.hAkinobu Mita
get_bios_ebda() exists in asm/rio.h and asm/bios_ebda.h. This patch removes the one in asm/rio.h. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: get_bios_ebda() requires asm/io.hAkinobu Mita
include <asm/io.h> for phys_to_virt() Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: use bitmap library for pin_programmedAkinobu Mita
Use bitmap library for pin_programmed rather than reinvent bitmaps. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86_64 ia32 ptrace: convert to compat_arch_ptraceRoland McGrath
Now that there are no more special cases in sys32_ptrace, we can convert to using the generic compat_sys_ptrace entry point. The sys32_ptrace function gets simpler and becomes compat_arch_ptrace. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: remove NexGen supportDmitri Vorobiev
It is claimed that NexGen CPUs were never shipped: http://lkml.org/lkml/2008/4/20/179 Also, the kernel support for these chips has been broken for a long time, the code intended to support NexGen thereby being essentially dead. As an outcome of the discussion that can be found using the URL above, this patch removes the NexGen support altogether. The changes in this patch survived a defconfig build for i386, a couple of successful randconfig builds, as well as a runtime test, which consisted in booting a 32-bit x86 box up to the shell prompt. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26fix asm-x86/{posix_types,unistd}.hAdrian Bunk
Jeff Chua reported that: Commit e40c0fe6b0b5dd16aec3c0dad311d36b19d78fd9 (x86: cleanup duplicate includes) turned the userspace asm-x86/posix_types.h and asm-x86/unistd.h headers into empty files. This patch reverts these bogus changes. Reported-by: Jeff Chua <jeff.chua.linux@gmail.com> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat: generic: add ioremap_wc() interface wrapper /dev/mem: make promisc the default pat: cleanups x86: PAT use reserve free memtype in mmap of /dev/mem x86: PAT phys_mem_access_prot_allowed for dev/mem mmap x86: PAT avoid aliasing in /dev/mem read/write devmem: add range_is_allowed() check to mmap of /dev/mem x86: introduce /dev/mem restrictions with a config option
2008-04-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-xen-next * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-xen-next: (52 commits) xen: add balloon driver xen: allow compilation with non-flat memory xen: fold xen_sysexit into xen_iret xen: allow set_pte_at on init_mm to be lockless xen: disable preemption during tlb flush xen pvfb: Para-virtual framebuffer, keyboard and pointer driver xen: Add compatibility aliases for frontend drivers xen: Module autoprobing support for frontend drivers xen blkfront: Delay wait for block devices until after the disk is added xen/blkfront: use bdget_disk xen: Make xen-blkfront write its protocol ABI to xenstore xen: import arch generic part of xencomm xen: make grant table arch portable xen: replace callers of alloc_vm_area()/free_vm_area() with xen_ prefixed one xen: make include/xen/page.h portable moving those definitions under asm dir xen: add resend_irq_on_evtchn() definition into events.c Xen: make events.c portable for ia64/xen support xen: move events.c to drivers/xen for IA64/Xen support xen: move features.c from arch/x86/xen/features.c to drivers/xen xen: add missing definitions in include/xen/interface/vcpu.h which ia64/xen needs ...
2008-04-25x86: make clear_fixmap() available on 64-bit as wellIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-24xen: replace callers of alloc_vm_area()/free_vm_area() with xen_ prefixed oneIsaku Yamahata
Don't use alloc_vm_area()/free_vm_area() directly, instead define xen_alloc_vm_area()/xen_free_vm_area() and use them. alloc_vm_area()/free_vm_area() are used to allocate/free area which are for grant table mapping. Xen/x86 grant table is based on virtual address so that alloc_vm_area()/free_vm_area() are suitable. On the other hand Xen/ia64 (and Xen/powerpc) grant table is based on pseudo physical address (guest physical address) so that allocation should be done differently. The original version of xenified Linux/IA64 have its own allocate_vm_area()/free_vm_area() definitions which don't allocate vm area contradictory to those names. Now vanilla Linux already has its definitions so that it's impossible to have IA64 definitions of allocate_vm_area()/free_vm_area(). Instead introduce xen_allocate_vm_area()/xen_free_vm_area() and use them. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24xen: make include/xen/page.h portable moving those definitions under asm dirIsaku Yamahata
The definitions in include/asm/xen/page.h are arch specific. ia64/xen wants to define its own version. So move them to arch specific directory and keep include/xen/page.h in order not to break compilation. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24Xen: make events.c portable for ia64/xen supportIsaku Yamahata
Remove x86 dependency in drivers/xen/events.c for ia64/xen support introducing include/asm/xen/events.h. Introduce xen_irqs_disabled() to hide regs->flags Introduce xen_do_IRQ() to hide regs->orig_ax. make enum ipi_vector definition arch specific. ia64/xen needs four vectors. Add one rmb() because on ia64 xchg() isn't barrier. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24xen: add missing definitions for xen grant table which ia64/xen needsIsaku Yamahata
Add xen handles realted definitions for grant table which ia64/xen needs. Pointer argumsnts for ia64/xen hypercall are passed in pseudo physical address (guest physical address) so that it is required to convert guest kernel virtual address into pseudo physical address right before issuing hypercall. The xen guest handle represents such arguments. Define necessary handles and helper functions. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24xen: add support for callbackops hypercallJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: unify pgd ctor/dtorJeremy Fitzhardinge
All pagetables need fundamentally the same setup and destruction, so just use the same code for everything. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: unify KERNEL_PGD_PTRSJeremy Fitzhardinge
Make KERNEL_PGD_PTRS common, as previously it was only being defined for 32-bit. There are a couple of follow-on changes from this: - KERNEL_PGD_PTRS was being defined in terms of USER_PGD_PTRS. The definition of USER_PGD_PTRS doesn't really make much sense on x86-64, since it can have two different user address-space configurations. I renamed USER_PGD_PTRS to KERNEL_PGD_BOUNDARY, which is meaningful for all of 32/32, 32/64 and 64/64 process configurations. - USER_PTRS_PER_PGD was also defined and was being used for similar purposes. Converting its users to KERNEL_PGD_BOUNDARY left it completely unused, and so I removed it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Andi Kleen <ak@suse.de> Cc: Zach Amsden <zach@vmware.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: demacro pgalloc paravirt stubsJeremy Fitzhardinge
Turn paravirt stubs into inline functions, so that the arguments are still typechecked. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86/pgtable.h: demacro ptep_clear_flush_youngJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86/pgtable.h: demacro ptep_test_and_clear_youngJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86/pgtable.h: demacro ptep_set_access_flagsJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: add pud_alloc for 4-level pagetablesJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: rename paravirt_alloc_pt etc after the pagetable structureJeremy Fitzhardinge
Rename (alloc|release)_(pt|pd) to pte/pmd to explicitly match the name of the appropriate pagetable level structure. [ x86.git merge work by Mark McLoughlin <markmc@redhat.com> ] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: move pgalloc pud and pgd operations into common placeJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: move pmd functions into common asm/pgalloc.hJeremy Fitzhardinge
Common definitions for 3-level pagetable functions. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: move pte functions into common asm/pgalloc.hJeremy Fitzhardinge
Common definitions for 2-level pagetable functions. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: put paravirt stubs into common asm/pgalloc.hJeremy Fitzhardinge
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: xen unify x86 add common mm pgtable c fixIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: add common mm/pgtable.cJeremy Fitzhardinge
Add a common arch/x86/mm/pgtable.c file for common pagetable functions. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: convert pgalloc_64.h from macros to inlinesJeremy Fitzhardinge
Convert asm-x86/pgalloc_64.h from macros into functions (#include hell prevents __*_free_tlb from being inline, but they're probably a bit big to inline anyway). Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-24x86: PAT phys_mem_access_prot_allowed for dev/mem mmapvenkatesh.pallipadi@intel.com
Introduce phys_mem_access_prot_allowed(), which checks whether the mapping is possible, without any conflicts and returns success or failure based on that. phys_mem_access_prot() by itself does not allow failure case. This ability to return error is needed for PAT where we may have aliasing conflicts. x86 setup __HAVE_PHYS_MEM_ACCESS_PROT and move x86 specific code out of /dev/mem into arch specific area. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-24x86: PAT avoid aliasing in /dev/mem read/writevenkatesh.pallipadi@intel.com
Add xlate and unxlate around /dev/mem read/write. This sets up the mapping that can be used for /dev/mem read and write without aliasing worries. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-24x86: introduce /dev/mem restrictions with a config optionArjan van de Ven
This patch introduces a restriction on /dev/mem: Only non-memory can be read or written unless the newly introduced config option is set. The X server needs access to /dev/mem for the PCI space, but it doesn't need access to memory; both the file permissions and SELinux permissions of /dev/mem just make X effectively super-super powerful. With the exception of the BIOS area, there's just no valid app that uses /dev/mem on actual memory. Other popular users of /dev/mem are rootkits and the like. (note: mmap access of memory via /dev/mem was already not allowed since a really long time) People who want to use /dev/mem for kernel debugging can enable the config option. The restrictions of this patch have been in the Fedora and RHEL kernels for at least 4 years without any problems. 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>
2008-04-24"make namespacecheck" fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-21Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel: (62 commits) sched: build fix sched: better rt-group documentation sched: features fix sched: /debug/sched_features sched: add SCHED_FEAT_DEADLINE sched: debug: show a weight tree sched: fair: weight calculations sched: fair-group: de-couple load-balancing from the rb-trees sched: fair-group scheduling vs latency sched: rt-group: optimize dequeue_rt_stack sched: debug: add some debug code to handle the full hierarchy sched: fair-group: SMP-nice for group scheduling sched, cpuset: customize sched domains, core sched, cpuset: customize sched domains, docs sched: prepatory code movement sched: rt: multi level group constraints sched: task_group hierarchy sched: fix the task_group hierarchy for UID grouping sched: allow the group scheduler to have multiple levels sched: mix tasks and groups ...
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