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2008-10-13x86, traps: converge do_debug handlersAlexander van Heukelum
Make the x86_64-version and the i386-version of do_debug more similar. - introduce preempt_conditional_sti/cli to i386. The preempt-count is now elevated during the trap handler, like on x86_64. It does not run on a separate stack, however. - replace an open-coded "send_sigtrap" - copy some comments Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86, traps: introduce dotraplinkageAlexander van Heukelum
Mark the exception handlers with "dotraplinkage" to hide the calling convention differences between i386 and x86_64. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86, traps, i386: factor out lazy io-bitmap copyAlexander van Heukelum
x86_64 does not do the lazy io-bitmap dance. Putting it in its own function makes i386's do_general_protection look much more like x86_64's. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86, traps: split out math_error and simd_math_errorAlexander van Heukelum
Split out math_error from do_coprocessor_error and simd_math_error from do_simd_coprocessor_error, like on i386. While at it, add the "error_code" parameter to do_coprocessor_error, do_simd_coprocessor_error and do_spurious_interrupt_bug. This does not change the generated code, but brings the declarations in line with all the other trap handlers. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86_64: split out dumpstack code from traps_64.cAlexander van Heukelum
The dumpstack code is logically quite independent from the hardware traps. Split it out into its own file. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13i386: split out dumpstack code from traps_32.cAlexander van Heukelum
The dumpstack code is logically quite independent from the hardware traps. Split it out into its own file. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2Vegard Nossum
virt_addr_valid() calls __pa(), which calls __phys_addr(). With CONFIG_DEBUG_VIRTUAL=y, __phys_addr() will kill the kernel if the address *isn't* valid. That's clearly wrong for virt_addr_valid(). We also incorporate the debugging checks into virt_addr_valid(). Signed-off-by: Vegard Nossum <vegardno@ben.ifi.uio.no> Acked-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: allow number of additional hotplug CPUs to be set at compile time, V2Chuck Ebbert
x86: allow number of additional hotplug CPUs to be set at compile time, V2 The default number of additional CPU IDs for hotplugging is determined by asking ACPI or mptables how many "disabled" CPUs there are in the system, but many systems get this wrong so that e.g. a uniprocessor machine gets an extra CPU allocated and never switches to single CPU mode. And sometimes CPU hotplugging is enabled only for suspend/hibernate anyway, so the additional CPU IDs are not wanted. Allow the number to be set to zero at compile time. Also, force the number of extra CPUs to zero if hotplugging is disabled which allows removing some conditional code. Tested on uniprocessor x86_64 that ACPI claims has a disabled processor, with CPU hotplugging configured. ("After" has the number of additional CPUs set to 0) Before: NR_CPUS: 512, nr_cpu_ids: 2, nr_node_ids 1 After: NR_CPUS: 512, nr_cpu_ids: 1, nr_node_ids 1 [Changed the name of the option and the prompt according to Ingo's suggestion.] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: do not allow to optimize flag_is_changeable_p() (rev. 2)Krzysztof Helt
The flag_is_changeable_p() is used by has_cpuid_p() which can return different results in the code sequence below: if (!have_cpuid_p()) identify_cpu_without_cpuid(c); /* cyrix could have cpuid enabled via c_identify()*/ if (!have_cpuid_p()) return; Otherwise, the gcc 3.4.6 optimizes these two calls into one which make the code not working correctly. Cyrix cpus have the CPUID instruction enabled before the second call to the have_cpuid_p() but it is not detected due to the gcc optimization. Thus the ARR registers (mtrr like) are not detected on such a cpu. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: __show_registers() and __show_regs() API unificationPekka Enberg
Currently the low-level function to dump user-passed registers on i386 is called __show_registers() whereas on x86-64 it's called __show_regs(). Unify the API to simplify porting of kmemcheck to x86-64. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86, UV: new UV genapic functions for x2apicJack Steiner
Add functions that use the infrastructure added by the x2apic code. These functions were originally stubbed out since the UV code went into the tree prior to the x2apic code. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: move prefill_possible_map calling early, fix, V2Chuck Ebbert
Commit 4a701737 ("x86: move prefill_possible_map calling early, fix") is the wrong fix: prefill_possible_map() needs to be available even when CONFIG_HOTPLUG_CPU is not set. A followon patch will do that. Fix this correctly by making prefill_possible_map() available even when CONFIG_HOTPLUG_CPU is not set. The function is needed so that the number of possible CPUs can be determined. Tested on uniprocessor machine with CPU hotplug disabled. From boot log: Before: NR_CPUS: 512, nr_cpu_ids: 512, nr_node_ids 1 After: NR_CPUS: 512, nr_cpu_ids: 1, nr_node_ids 1 Signed-off-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: merge winchip-2 and winchip-2a cpu choicesKrzysztof Helt
The Winchip-2 and Winchip-2A cpu choices select the same options for kernel and compiler. Merge them to save few bytes and reduce confusion. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86, uv: fix for size of hub mappingsJack Steiner
Fix the size of the mappings of UV hub registers. Size must be a function of the maximum node number within the SSI. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: cleanup, remove extra ifdefYinghai Lu
also change two functions to static. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: i386: make do_trap more like x86_64Alexander van Heukelum
This patch hardcodes which traps should be forwarded to handle_vm86_trap in do_trap. This allows to remove the vm86 parameter from the i386-version of do_trap, which makes the DO_VM86_ERROR and DO_VM86_ERROR_INFO macros unnecessary. x86_64 part is whitespace only. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86: remove trace_hardirqs_fixup from pagefault handlerAlexander van Heukelum
The last use of trace_hardirqs_fixup is unnecessary, because the trap is taken with interrupt off on i386 as well as x86_64, and the irq-tracer is notified of this from the assembly code. trace_hardirqs_fixup and trace_hardirqs_fixup_flags are removed from include/asm-x86/irqflags.h as they are no longer used. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: remove trace_hardirqs_fixup from debug handlerAlexander van Heukelum
All exceptions are taken via interrupt gates. TRACE_IRQS_OFF is called just before entering the C code, so the irq state is known to the irq tracer at this point. No need to call trace_hardirqs_fixup. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: remove trace_hardirqs_fixup from int3 handlerAlexander van Heukelum
All exceptions are taken via interrupt gates. TRACE_IRQS_OFF is called just before entering the C code, so the irq state is known to the irq tracer at this point. No need to call trace_hardirqs_fixup. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: remove trace_hardirqs_fixup from DO_ERROR_INFO macroAlexander van Heukelum
All exceptions are taken via interrupt gates. TRACE_IRQS_OFF is called just before entering the C code, so the irq state is known to the irq tracer at this point. No need to call trace_hardirqs_fixup. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: add TRACE_IRQS_OFF in paranoidentry macroAlexander van Heukelum
Add TRACE_IRQS_OFF just before entering the C code. All exceptions are taken via interrupt gates. If irq tracing is enabled, it should be notified as soon as possible. Interrupts are only (conditionally) re-enabled in C code. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13traps: x86_64: add TRACE_IRQS_OFF in error_entryAlexander van Heukelum
Add TRACE_IRQS_OFF just before entering the C code. All exceptions are taken via interrupt gates. If irq tracing is enabled, it should be notified as soon as possible. Interrupts are only (conditionally) re-enabled in C code. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86, uv: add early detection of UV system typesJack Steiner
Portions of the ACPI code needs to know if a system is a UV system prior to genapic initialization. This patch adds a call early_acpi_boot_init() so that the apic type is discovered earlier. V2 of the patch adding fixes from Yinghai Lu. Much cleaner and smaller. Signed-off-by: Jack Steiner <steiner@sgi.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: move vgetcpu mode probing to cpu detectionGlauber Costa
Take it out of time initialization and move it to cpu detection time. Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: wrap MCA_bus test around an ifdefGlauber Costa
Only test for MCA_bus if support for MCA is compiled in. Also, for x86_64, write the code inside the conditional for consistency with i386. It won't bite us, since it'll probably never select CONFIG_MCA anyway. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: replace hardcoded numberGlauber Costa
Replace "4" in time_32.c code by sizeof(long). This way, it can work on x86_64 too. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: rename timer_event_interrupt to timer_interruptGlauber Costa
Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: make init_ISA_irqs nonstaticGlauber Costa
Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: factor out irq initialization for x86_64Glauber Costa
Provide apic_intr_init and smp_intr_init functions. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: bind irq0 irq data to cpu0Glauber Costa
Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: use user_mode_vm instead of user_modeGlauber Costa
For x86_64, it does not really matter. But makes the code equal to i386. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: remove SEGMENT_IS_FLAT_CODEGlauber Costa
There are no users in the kernel. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: use frame pointer information on x86_64 profile_pcGlauber Costa
Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: set bp field in pt_regs properlyGlauber Costa
Save rbp twice: One is for marking the stack frame, as usual (already there), and the other, to fill pt_regs properly. This is because bx comes right before the last saved register in that structure, and not bp. If the base pointer were in the place bx is today, this would not be needed. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: coalesce testsGlauber Costa
Coalesce v8086_mode and user_mode into a single user_mode_vm() test. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: use user_mode macroGlauber Costa
Instead of using SEGMENT_IS_KERNEL_CODE, use the "user_mode" macro, which can play the same role. Delete the former, since it now lacks any user. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: cpu don't print duplicated vendor stringYinghai Lu
Some CPUs have vendor string in the middle of model_id instead of beginning Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: make mm/gup.c more virtualization friendlyJan Beulich
Since pte_flags() is much cheaper than pte_val() in some virtualized environments (namely, Xen), use the former whereever possible. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: "Nick Piggin" <npiggin@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86-64: fix combining of regions in init_memory_mapping()Jan Beulich
When nr_range gets decremented, the same slot must be considered for coalescing with its new successor again. The issue is apparently pretty benign to native code, but surfaces as a boot time crash in our forward ported Xen tree (where the page table setup overall works differently than in native). Signed-off-by: Jan Beulich <jbeulich@novell.com> Acked-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: smpboot - check if we have ESR register in wakeup_secondary_cpuCyrill Gorcunov
We should check if we have ESR register before reading from it. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: "Maciej W. Rozycki" <macro@linux-mips.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: add memory clobber in switch_to()Vegard Nossum
Segment registers are reloaded, so we should add a memory clobber. The generated assembly code is identical in my tests, but this doesn't mean it is necessarily true for all configurations/compilers. x86_64 already has the memory clobber. Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: print out EBDA/lowmem addressIngo Molnar
it's useful for debugging purposes to know the location of the EBDA. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: check dsdt before find oem table for es7000, v2Yinghai Lu
v2: use __acpi_unmap_table() Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86-64: don't check for map replacementJeremy Fitzhardinge
The check prevents flags on mappings from being changed, which is not desireable. There's no need to check for replacing a mapping, and x86-32 does not do this check. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: use early_memremap() in setup.cJeremy Fitzhardinge
The remappings in setup.c are all just ordinary memory, so use early_memremap() rather than early_ioremap(). Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: add early_memremap()Jeremy Fitzhardinge
early_ioremap() is also used to map normal memory when constructing the linear memory mapping. However, since we sometimes need to be able to distinguish between actual IO mappings and normal memory mappings, add a early_memremap() call, which maps with PAGE_KERNEL (as opposed to PAGE_KERNEL_IO for early_ioremap()), and use it when constructing pagetables. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: remove duplicate early_ioremap declarationsJeremy Fitzhardinge
early_ioremap() is redeclared in several places; remove them. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13x86: add _PAGE_IOMAP pte flag for IO mappingsJeremy Fitzhardinge
Use one of the software-defined PTE bits to indicate that a mapping is intended for an IO address. On native hardware this is irrelevent, since a physical address is a physical address. But in a virtual environment, physical addresses are also virtualized, so there needs to be some way to distinguish between pseudo-physical addresses and actual hardware addresses; _PAGE_IOMAP indicates this intent. By default, __supported_pte_mask masks out _PAGE_IOMAP, so it doesn't even appear in the final pagetable. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13i386: trace_hardirqs_fixup should now not be necessary: irqs are off.Alexander van Heukelum
The exception handlers in entry_32.S should now all call TRACE_IRQS_OFF before calling the C code. The calls to trace_hardirqs_fixup should now be unnecessary. Remove them. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-13i386: add TRACE_IRQS_OFF for the exception 3 (int3)Alexander van Heukelum
At this point interrupts are off, so let's inform the tracing code of that fact before calling into C. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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