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* Revert "Oprofile Multiplexing Patch"Robert Richter2008-09-24
| | | | | | | | | Reverting commit 1a960b402a51d80abf54e3f8e4972374ffe5f22d for the main branch. Multiplexing will be tracked on a separate feature branch. Conflicts: arch/x86/oprofile/nmi_int.c
* x86, oprofile: BUG: using smp_processor_id() in preemptible codeAndrea Righi2008-09-22
| | | | | | | | | | | | | | | | | | | | | | | | Add __raw access before setting per cpu variable switch_index, to avoid the following BUG: [ 449.166827] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/6998 [ 449.166848] caller is op_nmi_init+0xf0/0x2b0 [oprofile] [ 449.166855] Pid: 6998, comm: modprobe Not tainted 2.6.27-rc5-mm1 #29 [ 449.166860] Call Trace: [ 449.166872] [<ffffffff80362d67>] debug_smp_processor_id+0xd7/0xe0 [ 449.166887] [<ffffffffa00181c0>] op_nmi_init+0xf0/0x2b0 [oprofile] [ 449.166902] [<ffffffffa0018000>] oprofile_init+0x0/0x60 [oprofile] [ 449.166915] [<ffffffffa00180a9>] oprofile_arch_init+0x9/0x30 [oprofile] [ 449.166928] [<ffffffffa001801e>] oprofile_init+0x1e/0x60 [oprofile] [ 449.166937] [<ffffffff8020903b>] _stext+0x3b/0x160 [ 449.166946] [<ffffffff80477985>] __mutex_unlock_slowpath+0xe5/0x190 [ 449.166955] [<ffffffff80262c1a>] trace_hardirqs_on_caller+0xca/0x140 [ 449.166965] [<ffffffff8026f7fc>] sys_init_module+0xdc/0x210 [ 449.166972] [<ffffffff8020b7cb>] system_call_fastpath+0x16/0x1b Signed-off-by: Andrea Righi <righi.andrea@gmail.com> Acked-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'x86/oprofile' into oprofileIngo Molnar2008-08-18
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| * x86: Coding style fixes to arch/x86/oprofile/op_model_p4.cPaolo Ciarrocchi2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A coding style patch to arch/x86/oprofile/op_model_p4.c that removes 87 errors and 4 warnings. Before: total: 89 errors, 13 warnings, 722 lines checked After: total: 2 errors, 9 warnings, 721 lines checked Compile tested, binary verified as follow: paolo@paolo-desktop:~/linux.trees.git$ size /tmp/op_model_p4.o.* text data bss dec hex filename 2691 968 32 3691 e6b /tmp/op_model_p4.o.after 2691 968 32 3691 e6b /tmp/op_model_p4.o.before paolo@paolo-desktop:~/linux.trees.git$ md5sum /tmp/op_model_p4.o.* 8c1c9823bab33333e1f7f76574e62561 /tmp/op_model_p4.o.after 8c1c9823bab33333e1f7f76574e62561 /tmp/op_model_p4.o.before Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com> Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2008-08-18
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: fix build warnings in real mode code x86, calgary: fix section mismatch warning - get_tce_space_from_tar x86: silence section mismatch warning - get_local_pda x86, percpu: silence section mismatch warnings related to EARLY_PER_CPU variables x86: fix i486 suspend to disk CR4 oops x86: mpparse.c: fix section mismatch warning x86: mmconf: fix section mismatch warning x86: fix MP_processor_info section mismatch warning x86, tsc: fix section mismatch warning x86: correct register constraints for 64-bit atomic operations
| | * x86: fix build warnings in real mode codeAndi Kleen2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This recent patch commit c3965bd15118742d72b4bc1a290d37b3f081eb98 Author: Paul Jackson <pj@sgi.com> Date: Wed May 14 08:15:34 2008 -0700 x86 boot: proper use of ARRAY_SIZE instead of repeated E820MAX constant caused these new warnings during a normal build: In file included from linux-2.6/arch/x86/boot/memory.c:17: linux-2.6/include/linux/log2.h: In function '__ilog2_u32': linux-2.6/include/linux/log2.h:34: warning: implicit declaration of function 'fls' linux-2.6/include/linux/log2.h: In function '__ilog2_u64': linux-2.6/include/linux/log2.h:42: warning: implicit declaration of function 'fls64' linux-2.6/include/linux/log2.h: In function '__roundup_pow_of_two ': linux-2.6/include/linux/log2.h:63: warning: implicit declaration of function 'fls_long' I tried to fix them in log2.h, but it's difficult because the real mode environment is completely different from a normal kernel environment. Instead define an own ARRAY_SIZE macro in boot.h, similar to the other private macros there. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86, calgary: fix section mismatch warning - get_tce_space_from_tarMarcin Slusarz2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | WARNING: vmlinux.o(.text+0x27032): Section mismatch in reference from the function get_tce_space_from_tar() to the function .init.text:calgary_bus_has_devices() The function get_tce_space_from_tar() references the function __init calgary_bus_has_devices(). This is often because get_tce_space_from_tar lacks a __init annotation or the annotation of calgary_bus_has_devices is wrong. get_tce_space_from_tar is called only from __init function (calgary_init) and calls __init function (calgary_bus_has_devices). So annotate it properly. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Chandru Siddalingappa <chandru@in.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86: silence section mismatch warning - get_local_pdaMarcin Slusarz2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Take out part of get_local_pda referencing __init function (free_bootmem) to new (static) function marked as __ref. It's safe to do because free_bootmem is called before __init sections are dropped. WARNING: vmlinux.o(.cpuinit.text+0x3cd7): Section mismatch in reference from the function get_local_pda() to the function .init.text:free_bootmem() The function __cpuinit get_local_pda() references a function __init free_bootmem(). If free_bootmem is only used by get_local_pda then annotate free_bootmem with a matching annotation. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86: fix i486 suspend to disk CR4 oopsDavid Fries2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arch/x86/power/cpu_32.c __save_processor_state calls read_cr4() only a i486 CPU doesn't have the CR4 register. Trying to read it produces an invalid opcode oops during suspend to disk. Use the safe rc4 reading op instead. If the value to be written is zero the write is skipped. arch/x86/power/hibernate_asm_32.S done: swapped the use of %eax and %ecx to use jecxz for the zero test and jump over store to %cr4. restore_image: s/%ecx/%eax/ to be consistent with done: In addition to __save_processor_state, acpi_save_state_mem, efi_call_phys_prelog, and efi_call_phys_epilog had checks added (acpi restore was in assembly and already had a check for non-zero). There were other reads and writes of CR4, but MCE and virtualization shouldn't be executed on a i486 anyway. Signed-off-by: David Fries <david@fries.net> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86: mpparse.c: fix section mismatch warningMarcin Slusarz2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | WARNING: vmlinux.o(.text+0x118f7): Section mismatch in reference from the function construct_ioapic_table() to the function .init.text:MP_bus_info() The function construct_ioapic_table() references the function __init MP_bus_info(). This is often because construct_ioapic_table lacks a __init annotation or the annotation of MP_bus_info is wrong. construct_ioapic_table is called only from construct_default_ISA_mptable which is __init Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86: mmconf: fix section mismatch warningMarcin Slusarz2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | WARNING: arch/x86/kernel/built-in.o(.cpuinit.text+0x1591): Section mismatch in reference from the function init_amd() to the function .init.text:check_enable_amd_mmconf_dmi() The function __cpuinit init_amd() references a function __init check_enable_amd_mmconf_dmi(). If check_enable_amd_mmconf_dmi is only used by init_amd then annotate check_enable_amd_mmconf_dmi with a matching annotation. check_enable_amd_mmconf_dmi is only called from init_amd which is __cpuinit Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86: fix MP_processor_info section mismatch warningMarcin Slusarz2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | WARNING: arch/x86/kernel/built-in.o(.cpuinit.text+0x1fe7): Section mismatch in reference from the function MP_processor_info() to the variable .init.data:x86_quirks The function __cpuinit MP_processor_info() references a variable __initdata x86_quirks. If x86_quirks is only used by MP_processor_info then annotate x86_quirks with a matching annotation. MP_processor_info uses x86_quirks which is __init and is used only from smp_read_mpc and construct_default_ISA_mptable which are __init Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86, tsc: fix section mismatch warningMarcin Slusarz2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | WARNING: vmlinux.o(.text+0x7950): Section mismatch in reference from the function native_calibrate_tsc() to the function .init.text:tsc_read_refs() The function native_calibrate_tsc() references the function __init tsc_read_refs(). This is often because native_calibrate_tsc lacks a __init annotation or the annotation of tsc_read_refs is wrong. tsc_read_refs is called from native_calibrate_tsc which is not __init and native_calibrate_tsc cannot be marked __init Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | Merge branch 'merge' of ↵Linus Torvalds2008-08-18
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: Use generic compat_sys_old_readdir powerpc/kexec: Fix up KEXEC_CONTROL_CODE_SIZE missed during conversion powerpc: Remove dead module_find_bug code powerpc: Add CMO enabled flag and paging space data to lparcfg powerpc: Fix CMM page loaning on 64k page kernel with 4k hardware pages powerpc: Make CMO paging space pool ID and page size available powerpc: Fix lockdep IRQ tracing bug powerpc: Fix TLB invalidation on boot on 32-bit powerpc: Fix loss of vdso on fork on 32-bit
| | * | powerpc: Use generic compat_sys_old_readdirChristoph Hellwig2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the generic compat_sys_old_readdir instead of the powerpc one which is almost the same except for the almost complete lack of error handling. Note that we can't just use SYSCALL() in systbl.h because the native syscall is named old_readdir, not sys_old_readdir. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc/kexec: Fix up KEXEC_CONTROL_CODE_SIZE missed during conversionPaul Collins2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 163f6876f5c3ff8215e900b93779e960a56b3694 missed one, resulting in the following compile error: AS arch/powerpc/kernel/misc_32.o arch/powerpc/kernel/misc_32.S: Assembler messages: arch/powerpc/kernel/misc_32.S:902: Error: unsupported relocation against KEXEC_CONTROL_CODE_SIZE make[2]: *** [arch/powerpc/kernel/misc_32.o] Error 1 make[1]: *** [arch/powerpc/kernel] Error 2 make: *** [vmlinux] Error 2 I grepped arch/ and found no further instances. Signed-off-by: Paul Collins <paul@ondioline.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc: Remove dead module_find_bug codeSteven Rostedt2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Doing some various "make randconfig", I came across an error when CONFIG_BUG was not set: arch/powerpc/kernel/module.c: In function 'module_find_bug': arch/powerpc/kernel/module.c:111: error: increment of pointer to unknown structure arch/powerpc/kernel/module.c:111: error: arithmetic on pointer to an incomplete type arch/powerpc/kernel/module.c:112: error: dereferencing pointer to incomplete type Looking further into this, I found that module_find_bug, defined in powerpc arch code, is not called anywhere, so this just removes it. There is a static module_find_bug in lib/bug.c but that is a separate issue. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc: Add CMO enabled flag and paging space data to lparcfgRobert Jennings2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a field in lparcfg output to indicate whether the kernel is running on a dedicated or shared memory lpar. Added fields to show the paging space pool IDs and the CMO page size. Submitted-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc: Fix CMM page loaning on 64k page kernel with 4k hardware pagesBrian King2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the firmware page size used for collaborative memory overcommit is 4k, but the kernel is using 64k pages, the page loaning is currently broken as it only marks the first 4k page of each 64k page as loaned. This fixes this to iterate through each 4k page and mark them all as loaned/active. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc: Make CMO paging space pool ID and page size availableRobert Jennings2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During platform setup, save off the primary/secondary paging space pool IDs and the page size. Added accessors in hvcall.h for these variables. This is needed for a subsequent fix. Submitted-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc: Fix lockdep IRQ tracing bugBenjamin Herrenschmidt2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A small bogon sneaked into the ppc64 lockdep support. A test is branching slightly off causing a clobbered register value to overwrite the irq state under some circumstances. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc: Fix TLB invalidation on boot on 32-bitRocky Craig2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The intent of "flush_tlbs" is to invalidate all TLB entries by doing a TLB invalidate instruction for all pages in the address range 0 to 0x00400000. A loop counter is set up at the high value and decremented by page size. However, the loop is only done once as the sense of the conditional branch at the loop end does not match the setup/decrement. This fixes it to do the whole range by correcting the branch condition. Signed-off-by: Rocky Craig <rocky.craig@hp.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| | * | powerpc: Fix loss of vdso on fork on 32-bitBenjamin Herrenschmidt2008-08-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we fork, init_new_context() improperly resets the vdso_base of the new context to 0. That means that the new process loses access to the vdso for signal trampolines. The initialization should be unnecessary anyway as the context on a fresh mm should be 0 in the first place and binfmt_elf will initialize that value for a newly loaded process. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-08-18
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: lmb: Fix reserved region handling in lmb_enforce_memory_limit(). sparc64: Fix cmdline_memory_size handling bugs. sparc64: Fix overshoot in nid_range().
| | * | | sparc64: Fix cmdline_memory_size handling bugs.David S. Miller2008-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | First, lmb_enforce_memory_limit() interprets it's argument (mostly, heh) as a size limit not an address limit. So pass the raw cmdline_memory_size value into it. And we don't need to check it against zero, lmb_enforce_memory_limit() does that for us. Next, free_initmem() needs special handling when the kernel command line trims the available memory. The problem case is if the trimmed out memory is where the kernel image itself resides. When that memory is trimmed out, we don't add those physical ram areas to the sparsemem active ranges, amongst other things. Which means that this free_initmem() code will free up invalid page structs, resulting in either crashes or hangs. Just quick fix this by not freeing initmem at all if "mem=" was given on the boot command line. Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | | sparc64: Fix overshoot in nid_range().David S. Miller2008-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If 'start' does not begin on a page boundary, we can overshoot past 'end'. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2008-08-16
| |\ \ \ \ | | | |_|/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (32 commits) x86: add MAP_STACK mmap flag x86: fix section mismatch warning - spp_getpage() x86: change init_gdt to update the gdt via write_gdt, rather than a direct write. x86-64: fix overlap of modules and fixmap areas x86, geode-mfgpt: check IRQ before using MFGPT as clocksource x86, acpi: cleanup, temp_stack is used only when CONFIG_SMP is set x86: fix spin_is_contended() x86, nmi: clean UP NMI watchdog failure message x86, NMI: fix watchdog failure message x86: fix /proc/meminfo DirectMap x86: fix readb() et al compile error with gcc-3.2.3 arch/x86/Kconfig: clean up, experimental adjustement x86: invalidate caches before going into suspend x86, perfctr: don't use CCCR_OVF_PMI1 on Pentium 4Ds x86, AMD IOMMU: initialize dma_ops after sysfs registration x86m AMD IOMMU: cleanup: replace LOW_U32 macro with generic lower_32_bits x86, AMD IOMMU: initialize device table properly x86, AMD IOMMU: use status bit instead of memory write-back for completion wait x86: silence mmconfig printk x86, msr: fix NULL pointer deref due to msr_open on nonexistent CPUs ...
| | * | | x86: fix section mismatch warning - spp_getpage()Marcin Slusarz2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | WARNING: vmlinux.o(.text+0x17a3e): Section mismatch in reference from the function set_pte_vaddr_pud() to the function .init.text:spp_getpage() The function set_pte_vaddr_pud() references the function __init spp_getpage(). This is often because set_pte_vaddr_pud lacks a __init annotation or the annotation of spp_getpage is wrong. spp_getpage is called from __init (__init_extra_mapping) and non __init (set_pte_vaddr_pud) functions, so it can't be __init. Unfortunately it calls alloc_bootmem_pages which is __init, but does it only when bootmem allocator is available (after_bootmem == 0). So annotate it accordingly. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com>
| | * | | x86: change init_gdt to update the gdt via write_gdt, rather than a direct ↵Alex Nixon2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | write. By writing directly, a memory access violation can occur whilst hotplugging a CPU if the entry was previously marked read-only. Signed-off-by: Alex Nixon <alex.nixon@citrix.com> Cc: Jeremy Fitzhardinge <Jeremy.Fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | Merge branch 'x86/geode' into x86/urgentIngo Molnar2008-08-15
| | |\ \ \
| | | * | | x86, geode-mfgpt: check IRQ before using MFGPT as clocksourceJens Rottmann2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds a simple IRQ autodetection to the AMD Geode MFGPT driver, and more importantly, adds some checks, if IRQs can actually be received on the chosen line. This fixes cases where MFGPT is selected as clocksource though not producing any ticks, so the kernel simply starves during boot. Signed-off-by: Jens Rottmann <JRottmann@LiPPERTEmbedded.de> Cc: Andres Salomon <dilinger@debian.org> Cc: linux-geode@bombadil.infradead.org Cc: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86-64: fix overlap of modules and fixmap areasJan Beulich2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Plus add a build time check so this doesn't go unnoticed again. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86, acpi: cleanup, temp_stack is used only when CONFIG_SMP is setMarcin Slusarz2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fix: arch/x86/kernel/acpi/sleep.c:24: warning: 'temp_stack' defined but not used [ Sven Wegener <sven.wegener@stealer.net>: fix build bug ] Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86, nmi: clean UP NMI watchdog failure messageIngo Molnar2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | clean up the failure message - and redirect people to bugzilla instead of lkml. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86, NMI: fix watchdog failure messageAristeu Rozanski2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | > it just won't work at boot time - the second logic unit will be stuck: > > Booting processor 1/2 APIC 0x1 > Initializing CPU#1 > Calibrating delay using timer specific routine.. 5586.12 BogoMIPS (lpj=2793063) > CPU: Trace cache: 12K uops, L1 D cache: 16K > CPU: L2 cache: 1024K > CPU: Physical Processor ID: 0 > CPU: Processor Core ID: 1 > CPU1: Thermal monitoring enabled (TM1) > Intel(R) Pentium(R) D CPU 2.80GHz stepping 04 > Brought up 2 CPUs > testing NMI watchdog ... <4>WARNING: CPU#1: NMI appears to be stuck (0->0)! while at it... - fix that newline Signed-off-by: Aristeu Rozanski <aris@redhat.com> Cc: jvillalo@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86: fix /proc/meminfo DirectMapHugh Dickins2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do we actually want these DirectMap lines in the x86 /proc/meminfo? I can see they're interesting to CPA developers and TLB optimizers, but they don't fit its usual "where has all my memory gone?" usage. If they are to stay, here are some fixes. 1. On x86_32 without PAE, they're not 2M but 4M pages: no need to mess with the internal enum, but show the right name to users. 2. Many machines can never show anything but 0 for DirectMap1G, so suppress that line unless direct_gbpages are really enabled. 3. The unit in /proc/meminfo is kB not number of pages: HugePages messed that up, but they're an example to regret not to follow. 4. Once we use kB, it's easy to see that 1GB has gone missing (which explains why CONFIG_CPA_DEBUG=y soon wraps DirectMap2M negative): because head_64.S's level2_ident_pgt entries were not counted. My fix is not ideal, but works for more and for less than 1G, and avoids interfering with early bootup pagetable contortions. Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | arch/x86/Kconfig: clean up, experimental adjustementPavel Machek2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adjust experimental tags in Kconfig, update config to notice that i386/x86_64 is now single architecture. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86: invalidate caches before going into suspendMark Langsdorf2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a CPU core is shut down, all of its caches need to be flushed to prevent stale data from causing errors if the core is resumed. Current Linux suspend code performs an assignment after the flush, which can add dirty data back to the cache.  On some AMD platforms, additional speculative reads have caused crashes on resume because of this dirty data. Relocate the cache flush to be the very last thing done before halting.  Tie into an assembly line so the compile will not reorder it.  Add some documentation explaining what is going on and why we're doing this. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> Acked-by: Mark Borden <mark.borden@amd.com> Acked-by: Michael Hohmuth <michael.hohmuth@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86, perfctr: don't use CCCR_OVF_PMI1 on Pentium 4DsAristeu Rozanski2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, setup_p4_watchdog() use CCCR_OVF_PMI1 to enable the counter overflow interrupts to the second logical core. But this bit doesn't work on Pentium 4 Ds (model 4, stepping 4) and this patch avoids its use on these processors. Tested on 4 different machines that have this specific model with success. Signed-off-by: Aristeu Rozanski <aris@redhat.com> Cc: jvillalovos@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | Merge branch 'x86/amd-iommu' into x86/urgentIngo Molnar2008-08-15
| | |\ \ \ \
| | | * | | | x86, AMD IOMMU: initialize dma_ops after sysfs registrationJoerg Roedel2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If sysfs registration fails all memory used by IOMMU is freed. This happens after dma_ops initialization and the functions will access the freed memory then. Fix this by initializing dma_ops after the sysfs registration. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | | x86m AMD IOMMU: cleanup: replace LOW_U32 macro with generic lower_32_bitsJoerg Roedel2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | | x86, AMD IOMMU: initialize device table properlyJoerg Roedel2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds device table initializations which forbids memory accesses for devices per default and disables all page faults. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | | x86, AMD IOMMU: use status bit instead of memory write-back for completion waitJoerg Roedel2008-08-15
| | | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86: silence mmconfig printkDave Jones2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's so much broken mmconfig hardware/bios'es out there, that classing this as an error seems a little extreme. Lower its priority to KERN_INFO so that it isn't so noisy when booting with 'quiet' Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86, msr: fix NULL pointer deref due to msr_open on nonexistent CPUsDarrick J. Wong2008-08-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | msr_open tests for someone trying to open a device for a nonexistent CPU. However, the function always returns 0, not ret like it should, hence userspace can BUG the kernel trivially. This bug was introduced by the cdev lock_kernel pushdown patch last May. The BUG can be reproduced with these commands: # mknod fubar c 202 8 <-- pick a number less than NR_CPUS that is not the number of an online CPU # cat fubar Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86: hpet: workaround SB700 BIOSThomas Gleixner2008-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | AMD SB700 based systems with spread spectrum enabled use a SMM based HPET emulation to provide proper frequency setting. The SMM code is initialized with the first HPET register access and takes some time to complete. During this time the config register reads 0xffffffff. We check for max. 1000 loops whether the config register reads a non 0xffffffff value to make sure that HPET is up and running before we go further. A counting loop is safe, as the HPET access takes thousands of CPU cycles. On non SB700 based machines this check is only done once and has no side effects. Based on a quirk patch from: crane cai <crane.cai@amd.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| | * | | | x86: check bigsmp in smp_sanity_check instead of cpu_upYinghai Lu2008-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | clear bits for cpu nr > 8. This allows us to boot the full range of possible CPUs that the supported APIC model will allow. Previously we'd hang or boot up with less than 8 CPUs. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Tested-by: Jeff Chua <jeff.chua.linux@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86: don't call e820_regiter_active_regions if out of range on nodeYinghai Lu2008-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | so we don't get warning on 32bit system with 64g RAM or more Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86: resurrect proper handling of maxcpus= kernel option (v2)Max Krasnyansky2008-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For some reason we had two parsers registered for maxcpus=. One in init/main.c and another in arch/x86/smpboot.c. So I nuked the one in arch/x86. Also 64-bit kernels used to handle maxcpus= as documented in Documentation/cpu-hotplug.txt. CPUs with 'id > maxcpus' are initialized but not booted. 32-bit version for some reason ignored them even though all the infrastructure for booting them later is there. In the current mainline both 64 and 32 bit versions are broken. This patch restores the correct behaviour. I've tested x86_64 version on 4- and 8- way Core2 and 2-way Opteron based machines. Various config combinations SMP, !SMP, CPU_HOTPLUG, !CPU_HOTPLUG. Booted with maxcpus=1 and maxcpus=4, etc. Everything is working as expected. So far we've received two reports from different people confirming that 32-bit version also works fine, both on dual core laptops and 16way server machines. [v2: This version fixes visws breakage pointed out by Ingo.] Signed-off-by: Max Krasnyansky <maxk@qualcomm.com> Cc: lizf@cn.fujitsu.com Cc: jeff.chua.linux@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
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