- 30 Jan, 2008 40 commits
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Nick Piggin authored
This implements ticket lock support for more than 255 CPUs on x86. The code gets switched according to the configured NR_CPUS. Signed-off-by:
Nick Piggin <npiggin@suse.de> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Paolo Ciarrocchi authored
Simple coding style fixes. no code changed: text data bss dec hex filename 3139 576 194 3909 f45 fixup.o.before 3139 576 194 3909 f45 fixup.o.after md5: 9a3467057478b2d99962bdd448282eeb fixup.o.before.asm 9a3467057478b2d99962bdd448282eeb fixup.o.after.asm Signed-off-by:
Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com> Signed-off-by:
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Harvey Harrison authored
Use the fixup_exception() helper instead of the open-coded search_extable() users. Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Harvey Harrison authored
Should be the last of the error_code tests that could use the PF_ defines. Makes X86_32|64 a little closer. Signed-off-by:
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Harvey Harrison authored
Small step towards unifying traps_32|64.c. No functional changes. Pull out a small helper from an if() statement in die(). Marked as __kprobes as eventually we will want to call this from do_page_fault similar to how X86_64 does it. Signed-off-by:
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Nikanth Karthikesan authored
The machine check handler registers ioctl handler that is called with the BKL held. Changing to register unlocked_ioctl instead. Also mce ioctl handler does not seem to need any lock protection. To: Andi Kleen <andi@firstfloor.org> Cc: linux-kernel@vger.kernel.org Cc: kernel-janitors@vger.kernel.org Change the Machine check handler to use unlocked_ioctl instead of ioctl handler. Also the mce ioctl handler does not need any lock protection. Signed-off-by:
Nikanth Karthikesan <knikanth@suse.de> Signed-off-by:
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Jeremy Fitzhardinge authored
When the _PAGE_FOO constants are defined as (1ul << _PAGE_BIT_FOO), they become unsigned longs. In 32-bit PAE mode, these end up being implicitly cast to 64-bit types when used to manipulate a pte, and because they're unsigned the top 32-bits are 0, destroying the upper bits of the pte. When _PAGE_FOO constants are given a signed integer type, the cast to 64-bits will sign-extend so that the upper bits are all ones, preserving the upper pte bits in manipulations. Explain this in a prominent place. Signed-off-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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Jeremy Fitzhardinge authored
The hypervisor doesn't allow PCD or PWT to be set on guest ptes, so make sure they're masked out. Also, fix up some previous mispatching. Signed-off-by:
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Jeremy Fitzhardinge authored
Put all the defines for mapping pagetable operations to their native versions (for the non-paravirt case) into one place. Make the corresponding changes to paravirt.h. The tricky part here is that when a pagetable entry can't be updated atomically (ie, 32-bit PAE), we need special handlers for pte_clear, set_pte_atomic and set_pte_present. However, the other two modes don't need special handling for these, and can use a common set_pte(_at) path. [ mingo@elte.hu: fixes ] Signed-off-by:
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Jeremy Fitzhardinge authored
Move ZERO_PAGE/empty_zero_page to common place. Signed-off-by:
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Jeremy Fitzhardinge authored
&ptep->pte isn't always an unsigned long *, so cast it to avoid a warning. Signed-off-by:
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Jeremy Fitzhardinge authored
Make various pte accessors common. Signed-off-by:
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Jeremy Fitzhardinge authored
Fix various compilation problems as a result of changing pte_t. Signed-off-by:
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Jeremy Fitzhardinge authored
Make sure pte_t, whatever its definition, has a pte element with type pteval_t. This allows common code to access it without needing to be specifically parameterised on what pagetable mode we're compiling for. For 32-bit, this means that pte_t becomes a union with "pte" and "{ pte_low, pte_high }" (PAE) or just "pte_low" (non-PAE). Signed-off-by: -
Ingo Molnar authored
fix sign extension bug in PTE_MASK / _PTE_CHG_MASK. this resolves the following bootup crash on PAE systems: [ 94.710726] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 [ 94.717764] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 [ 94.724772] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 [ 94.731777] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 Signed-off-by:
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Ingo Molnar authored
based on: Subject: x86: unify pgtable accessors which use supported_pte_mask From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Jeremy Fitzhardinge authored
Make users of supported_pte_mask common. This has the side-effect of introducing the variable for 32-bit non-PAE, but I think its a pretty small cost to simplify the code. Signed-off-by:
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Jeremy Fitzhardinge authored
In 32-bit PAE, mask NX from pte_pfn, since it isn't part of the PFN. This code is due for unification anyway, but this fixes a latent bug. Signed-off-by:
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Jeremy Fitzhardinge authored
Unify functions to test and set bits in pagetable entries. NOP: only moves existing code around, without any change to it. Signed-off-by:
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Ingo Molnar authored
reorder. NOP. Signed-off-by:
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Ingo Molnar authored
add new ops to 32-bit. based on: Subject: x86/pgtable: unify pagetable accessors From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Ingo Molnar authored
change the pte_mk inlines to the unified format. Non-NOP! based on: Subject: x86/pgtable: unify pagetable accessors From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Ingo Molnar authored
change the pte_dirty/* inlines to the unified format. Non-NOP! based on: Subject: x86/pgtable: unify pagetable accessors From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Ingo Molnar authored
based on: Subject: x86/pgtable: unify pagetable accessors From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Ingo Molnar authored
based on: Subject: x86/pgtable: fix constant sign extension problem From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Jeremy Fitzhardinge authored
Avoid a conflict between Voyager's leave_mm and asm-x86/mmu.h's leave_mm. Signed-off-by:
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Jeremy Fitzhardinge authored
32 and 64-bit use the same flags for pagetable entries, so make them all common. [ mingo@elte.hu: fixes ] Signed-off-by:
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Ingo Molnar authored
add PWT bit to NOCACHE flags. No real difference to CPUs, but needed later for PAT. Signed-off-by:
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Paolo Ciarrocchi authored
Fix one error reported by checkpatch, it now reports: total: 0 errors, 0 warnings, 42 lines checked Signed-off-by:
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Mel Gorman authored
On 32-bit NUMA, the memmap representing struct pages on each node is allocated from node-local memory if possible. As only node-0 has memory from ZONE_NORMAL, the memmap must be mapped into low memory. This is done by reserving space in the Kernel Virtual Area (KVA) for the memmap belonging to other nodes by taking pages from the end of ZONE_NORMAL and remapping the other nodes memmap into those virtual addresses. The node boundaries are then adjusted so that the region of pages is not used and it is marked as reserved in the bootmem allocator. This reserved portion of the KVA is PMD aligned althought strictly speaking that requirement could be lifted (see thread at http://lkml.org/lkml/2007/8/24/220). The problem is that when aligned, there may be a portion of ZONE_NORMAL at the end that is not used for memmap and does not have an initialised memmap nor is it marked reserved in the bootmem allocator. Later in the boot process, these pages are freed and a storm of Bad page state messages result. This patch marks these pages reserved that are wasted due to alignment in the bootmem allocator so they are not accidently freed. It is worth noting that memory from node-0 is wasted where it could have been put into ZONE_HIGHMEM on NUMA machines. Worse, the KVA is always reserved from the location of real memory even when there is plenty of spare virtual address space. This patch also makes sure that reserve_bootmem() is not called with a 0-length size in numa_kva_reserve(). When this happens, it usually means that a kernel built for Summit is being booted on a normal machine. The resulting BUG_ON() is misleading so it is caught here. Signed-off-by:
Mel Gorman <mel@csn.ul.ie> Signed-off-by:
Andy Whitcroft <apw@shadowen.org> Signed-off-by:
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Markus Metzger authored
Return the size of bts_struct in the PTRACE_BTS_STATUS command. Change types to u32. Signed-off-by:
Markus Metzger <markus.t.metzger@intel.com> Signed-off-by:
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Ingo Molnar authored
migration helpers for KVM. Signed-off-by:
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Pavel Machek authored
Unify arch/x86/kernel/acpi/sleep*.c Pretty trivial unification; when two functions differed, it was usually in error handling, and better of the two was picked up. Signed-off-by:
Pavel Machek <pavel@suse.cz> Looks-okay-to: Rafael J. Wysocki <rjw@sisk.pl> Tested-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Ingo Molnar authored
clean up arch/x86/mm/fault_64.c a bit. Signed-off-by:
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Ananth N Mavinakayanahalli authored
Here is a quick and naive smoke test for kprobes. This is intended to just verify if some unrelated change broke the *probes subsystem. It is self contained, architecture agnostic and isn't of any great use by itself. This needs to be built in the kernel and runs a basic set of tests to verify if kprobes, jprobes and kretprobes run fine on the kernel. In case of an error, it'll print out a message with a "BUG" prefix. This is a start; we intend to add more tests to this bucket over time. Thanks to Jim Keniston and Masami Hiramatsu for comments and suggestions. Tested on x86 (32/64) and powerpc. Signed-off-by:
Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by:
Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by:
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travis@sgi.com authored
Form a single percpu.h from percpu_32.h and percpu_64.h. Both are now pretty small so this is simply adding them together. Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
Mike Travis <travis@sgi.com> Signed-off-by:
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travis@sgi.com authored
x86_64 provides an optimized way to determine the local per cpu area offset through the pda and determines the base by accessing a remote pda. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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travis@sgi.com authored
x86_32 only provides a special way to obtain the local per cpu area offset via x86_read_percpu. Otherwise it can fully use the generic handling. Cc: ak@suse.de Signed-off-by:
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travis@sgi.com authored
- add support for PER_CPU_ATTRIBUTES - fix generic smp percpu_modcopy to use per_cpu_offset() macro. Add the ability to use generic/percpu even if the arch needs to override several aspects of its operations. This will enable the use of generic percpu.h for all arches. An arch may define: __per_cpu_offset Do not use the generic pointer array. Arch must define per_cpu_offset(cpu) (used by x86_64, s390). __my_cpu_offset Can be defined to provide an optimized way to determine the offset for variables of the currently executing processor. Used by ia64, x86_64, x86_32, sparc64, s/390. SHIFT_PTR(ptr, offset) If an arch defines it then special handling of pointer arithmentic may be implemented. Used by s/390. (Some of these special percpu arch implementations may be later consolidated so that there are less cases to deal with.) Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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travis@sgi.com authored
- Special consideration for IA64: Add the ability to specify arch specific per cpu flags - remove .data.percpu attribute from DEFINE_PER_CPU for non-smp case. The arch definitions are all the same. So move them into linux/percpu.h. We cannot move DECLARE_PER_CPU since some include files just include asm/percpu.h to avoid include recursion problems. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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