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* x86: unify mmu_context.hJeremy Fitzhardinge2008-07-08
| | | | | | | | | | | | Some amount of asm-x86/mmu_context.h can be unified, including activate_mm paravirt hook. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: unify pgd_indexJeremy Fitzhardinge2008-07-08
| | | | | | | | | | | pgd_index is common for 32 and 64-bit, so move it to a common place. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, 64-bit: use __pgd() on mk_kernel_pgd()Eduardo Habkost2008-07-08
| | | | | | | | | | | Use __pgd() on mk_kernel_pgd() Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, 64-bit: add gate_offset() and gate_segment() macrosJeremy Fitzhardinge2008-07-08
| | | | | | | | | | | | | | For calculating the offset from struct gate_struct fields. [ gate_offset and gate_segment were broken for 32-bit. ] Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, 64-bit: unify early_ioremapJeremy Fitzhardinge2008-07-08
| | | | | | | | | | | The 32-bit early_ioremap will work equally well for 64-bit, so just use it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add memory barriers to wrmsrJeremy Fitzhardinge2008-07-08
| | | | | | | | | | | | | wrmsr is a special instruction which can have arbitrary system-wide effects. We don't want the compiler to reorder it with respect to memory operations, so make it a memory barrier. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add memory clobber to save/loadsegmentJeremy Fitzhardinge2008-07-08
| | | | | | | | | | | | | Add "memory" clobbers to savesegment and loadsegment, since they can affect memory accesses and we never want the compiler to reorder them with respect to memory references. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: asm-x86/pgtable.h: fix compiler warningJeremy Fitzhardinge2008-07-08
| | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: nmi_watchdog - introduce nmi_watchdog_active() helperCyrill Gorcunov2008-07-08
| | | | | | Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: macro@linux-mips.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: nmi_watchdog - use NMI_NONE by defaultCyrill Gorcunov2008-07-08
| | | | | | | | | | | | | | | There is no need to keep NMI_DISABLED definition and use it for nmi_watchdog by default. Here is the point why: - IO-APIC and APIC chips are programmed for nmi_watchdog support at very early stage of kernel booting and not having nmi_watchdog specified as boot option lead only to nmi_watchdog becomes to NMI_NONE anyway - enable nmi_watchdog thru /proc/sys/kernel/nmi if it was not specified at boot is not possible too (even having this sysfs entry) Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: macro@linux-mips.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 boot: allow overlapping early reserve memory rangesPaul Jackson2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for overlapping early memory reservations. In general, they still can't overlap, and will panic with "Overlapping early reservations" if they do overlap. But if a memory range is reserved with the new call: reserve_early_overlap_ok() rather than with the usual call: reserve_early() then subsequent early reservations are allowed to overlap. This new reserve_early_overlap_ok() call is only used in one place so far, which is the "BIOS reserved" reservation for the the EBDA region, which out of Paranoia reserves more than what the BIOS might have specified, and which thus might overlap with another legitimate early memory reservation (such as, perhaps, the EFI memmap.) Signed-off-by: Paul Jackson <pj@sgi.com> Cc: "Yinghai Lu" <yhlu.kernel@gmail.com> Cc: "Jack Steiner" <steiner@sgi.com> Cc: "Mike Travis" <travis@sgi.com> Cc: "Huang Cc: Ying" <ying.huang@intel.com> Cc: "Andi Kleen" <andi@firstfloor.org> Cc: "Andrew Morton" <akpm@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move some func calling from setup_arch to paging_initYinghai Lu2008-07-08
| | | | | | | | those function depend on paging setup pgtable, so they could access the ram in bootmem region but just get mapped. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: clean up using max_low_pfn on 32-bitYinghai Lu2008-07-08
| | | | | | | | | | | | | | so that max_low_pfn is not changed after it is set. so we can move that early and out of initmem_init. could call find_low_pfn_range just after max_pfn is set. also could move reserve_initrd out of setup_bootmem_allocator so 32bit is more like 64bit. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: introduce reserve_initrdYinghai Lu2008-07-08
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: introduce initmem_init for 32 bitYinghai Lu2008-07-08
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: introduce initmem_init for 64 bitYinghai Lu2008-07-08
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move reserve_standard_io_resource to setup.cYinghai Lu2008-07-08
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: seperate probe_roms into another fileYinghai Lu2008-07-08
| | | | | | | it is only needed for 32bit Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add e820_remove_rangeYinghai Lu2008-07-08
| | | | | | | | | ... so could add real hole in e820 agp check is using request_mem_region, and could fail if e820 is reserved... Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: change identify_cpu to staticYinghai Lu2008-07-08
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: seperate funcs from setup_64 to cpu common_64.cYinghai Lu2008-07-08
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@mail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: check command line when CONFIG_X86_MPPARSE is not set, v2Yinghai Lu2008-07-08
| | | | | | | | | if acpi=off, acpi=noirq and pci=noacpi, we need to disable apic. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: "Maciej W. Rozycki" <macro@linux-mips.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* RFC x86: try to remove arch_get_ram_rangeYinghai Lu2008-07-08
| | | | | | | | want to remove arch_get_ram_range, and use early_node_map instead. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move cpu_exit_clear to process_32.cGlauber Costa2008-07-08
| | | | | | | | Take it out of smpboot.c, and move it to process_32.c, closer to its only user. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: change __setup_vector_irq with setup_vector_irqGlauber Costa2008-07-08
| | | | | | | | | | We create a version of it for i386, and then take the CONFIG_X86_64 ifdef out of the game. We could create a __setup_vector_irq for i386, but it would incur in an unnecessary lock taking. Moreover, it is better practice to only export setup_vector_irq anyway. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move x86_64 gdt closer to i386Glauber Costa2008-07-08
| | | | | | | | | | | i386 and x86_64 used two different schemes for maintaining the gdt. With this patch, x86_64 initial gdt table is defined in a .c file, same way as i386 is now. Also, we call it "gdt_page", and the descriptor, "early_gdt_descr". This way we achieve common naming, which can allow for more code integration. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* build: add __page_aligned_data and __page_aligned_bssJeremy Fitzhardinge2008-07-08
| | | | | | | | | | | | | | | Making a variable page-aligned by using __attribute__((section(".data.page_aligned"))) is fragile because if sizeof(variable) is not also a multiple of page size, it leaves variables in the remainder of the section unaligned. This patch introduces two new qualifiers, __page_aligned_data and __page_aligned_bss to set the section *and* the alignment of variables. This makes page-aligned variables more robust because the linker will make sure they're aligned properly. Unfortunately it requires *all* page-aligned data to use these macros... Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: unify crashkernel reservation for 32 and 64 bitBernhard Walle2008-07-08
| | | | | | | | | | | | This patch moves the reserve_crashkernel() to setup.c and removes the architecture-specific version. Both versions were more or less the same. I tested it on both x86-64 and i386, with CONFIG_KEXEC on and off (so that it compiles). Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: yhlu.kernel@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'x86/fixmap' into x86/develIngo Molnar2008-07-08
|\ | | | | | | | | | | | | | | Conflicts: arch/x86/mm/init_64.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * Merge branch 'linus' into x86/fixmapIngo Molnar2008-06-25
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| * | x86/paravirt/xen: add set_fixmap pv_mmu_opsJeremy Fitzhardinge2008-06-20
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: implement set_pte_vaddrJeremy Fitzhardinge2008-06-20
| | | | | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify __set_fixmapJeremy Fitzhardinge2008-06-20
| | | | | | | | | | | | | | | | | | | | | In both cases, I went with the 32-bit behaviour. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify asm-x86/fixmap*.hJeremy Fitzhardinge2008-06-20
| | | | | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'x86/uv' into x86/develIngo Molnar2008-07-08
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| * | | x86: increase MAX_APICS for very large x86-64 configsJack Steiner2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Increase the maximum number of apics when running very large configurations. This patch has no affect on most systems. The patch has no effect on any 32-bit kernel. It adds ~4k to the size of 64-bit kernels but only if NR_CPUS > 255. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: fix stack overflow for large values of MAX_APICSJack Steiner2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | physid_mask_of_physid() causes a huge stack (12k) to be created if the number of APICS is large. Replace physid_mask_of_physid() with a new function that does not create large stacks. This is a problem only on large x86_64 systems. this paves the way to increase MAX_APICS. Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: linux-mm@kvack.org Cc: mingo@elte.hu Cc: tglx@linutronix.de Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | SGI UV: TLB shootdown using broadcast assist unitIngo Molnar2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TLB shootdown for SGI UV. v5: 6/12 corrections/improvements per Ingo's second review Signed-off-by: Cliff Wickman <cpw@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | SGI UV: TLB shootdown using broadcast assist unit, cleanupsCliff Wickman2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TLB shootdown for SGI UV. v1: 6/2 original v2: 6/3 corrections/improvements per Ingo's review v3: 6/4 split atomic operations off to a separate patch (Jeremy's review) v4: 6/12 include <mach_apic.h> rather than <asm/mach-bigsmp/mach_apic.h> (fixes a !SMP build problem that Ingo found) fix the index on uv_table_bases[blade] Signed-off-by: Cliff Wickman <cpw@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86 atomic operations: atomic_or_long() atomic_inc_short()Cliff Wickman2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide atomic operations for increment of a 16-bit integer and logical OR into a 64-bit integer. Signed-off-by: Cliff Wickman <cpw@sgi.com> Reviewed-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, SGI UV: TLB shootdown using broadcast assist unitCliff Wickman2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TLB shootdown for SGI UV. Depends on patch (in tip/x86/irq): x86-update-macros-used-by-uv-platform.patch Jack Steiner May 29 This patch provides the ability to flush TLB's in cpu's that are not on the local node. The hardware mechanism for distributing the flush messages is the UV's "broadcast assist unit". The hook to intercept TLB shootdown requests is a 2-line change to native_flush_tlb_others() (arch/x86/kernel/tlb_64.c). This code has been tested on a hardware simulator. The real hardware is not yet available. The shootdown statistics are provided through /proc/sgi_uv/ptc_statistics. The use of /sys was considered, but would have required the use of many /sys files. The debugfs was also considered, but these statistics should be available on an ongoing basis, not just for debugging. Issues to be fixed later: - The IRQ for the messaging interrupt is currently hardcoded as 200 (see UV_BAU_MESSAGE). It should be dynamically assigned in the future. - The use of appropriate udelay()'s is untested, as they are a problem in the simulator. Signed-off-by: Cliff Wickman <cpw@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | Merge branch 'linus' into x86/irqIngo Molnar2008-07-08
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* | \ \ \ Merge branch 'x86/nmi' into x86/develIngo Molnar2008-07-08
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/nmi.c arch/x86/kernel/nmi_32.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * \ \ \ \ Merge branch 'linus' into x86/nmiIngo Molnar2008-06-25
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| * | | | | Merge branch 'linus' into x86/nmiIngo Molnar2008-06-16
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/nmi_32.c
| * | | | | | x86: nmi - consolidate nmi_watchdog_default for 32bit modeCyrill Gorcunov2008-06-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 64bit mode bootstrap code does set nmi_watchdog to NMI_NONE by default and doing the same on 32bit mode is safe too. Such an action saves us from several #ifdef. Btw, my previous commit commit 19ec673ced067316b9732bc6d1c4ff4052e5f795 Author: Cyrill Gorcunov <gorcunov@gmail.com> Date: Wed May 28 23:00:47 2008 +0400 x86: nmi - fix incorrect NMI watchdog used by default did not fix the problem completely, moreover it introduced additional bug - nmi_watchdog would be set to either NMI_LOCAL_APIC or NMI_IO_APIC _regardless_ to boot option if being enabled thru /proc/sys/kernel/nmi_watchdog. Sorry for that. Fix it too. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: mingo@redhat.com Cc: hpa@zytor.com Cc: macro@linux-mips.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | | - fix typo in include/asm-x86/nmi.hIngo Molnar2008-05-30
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| * | | | | | x86: nmi - fix incorrect NMI watchdog used by defaultCyrill Gorcunov2008-05-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit commit 4b82b277707a39b97271439c475f186f63ec4692 Author: Cyrill Gorcunov <gorcunov@gmail.com> Date: Sat May 24 19:36:35 2008 +0400 set nmi_watchdog to NMI_IO_APIC as by default. This causes hangs on some machines with buggy watchdogs. Fix it - i.e. restore old behaviour. Thanks to Sitsofe Wheeler and Adrian Bunk for catching the problem and Maciej W. Rozycki for explanation what is going on there. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> CC: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | x86: nmi_32.c - add nmi_watchdog_default helperCyrill Gorcunov2008-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: hpa@zytor.com Cc: mingo@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | | x86: nmi - unify die_nmi() interfaceCyrill Gorcunov2008-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | By slightly changing 32bit mode die_nmi() we may unify the interface and make it common for both (32/64bit) modes Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: hpa@zytor.com Cc: mingo@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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