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* x86: kprobes change kprobe_handler flowHarvey Harrison2008-01-301-32/+28
| | | | | | | | | | | | | | | | Make the control flow of kprobe_handler more obvious. Collapse the separate if blocks/gotos with if/else blocks this unifies the duplication of the check for a breakpoint instruction race with another cpu. Create two jump targets: preempt_out: re-enables preemption before returning ret out: only returns ret Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* arch/x86/kernel/io_apic_{64,32}.c: use time_beforeJulia Lawall2008-01-302-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values. A simplified version of the semantic patch making this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @ change_compare_np @ expression E; @@ ( - jiffies <= E + time_before_eq(jiffies,E) | - jiffies >= E + time_after_eq(jiffies,E) | - jiffies < E + time_before(jiffies,E) | - jiffies > E + time_after(jiffies,E) ) @ include depends on change_compare_np @ @@ #include <linux/jiffies.h> @ no_include depends on !include && change_compare_np @ @@ #include <linux/...> + #include <linux/jiffies.h> // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* arch/x86/kernel/apm_32.c: use time_before, time_before_eq,Julia Lawall2008-01-301-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values. A simplified version of the semantic patch making this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @ change_compare_np @ expression E; @@ ( - jiffies <= E + time_before_eq(jiffies,E) | - jiffies >= E + time_after_eq(jiffies,E) | - jiffies < E + time_before(jiffies,E) | - jiffies > E + time_after(jiffies,E) ) @ include depends on change_compare_np @ @@ #include <linux/jiffies.h> @ no_include depends on !include && change_compare_np @ @@ #include <linux/...> + #include <linux/jiffies.h> // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: kprobes remove fix_riprel #ifdefHarvey Harrison2008-01-301-4/+5
| | | | | | | | | | | | Move #ifdef around function definiton into the function and unconditionally return on X86_32. Saves an ifdef from the one callsite. [ mingo@elte.hu: minor cleanup. ] Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: introduce REX prefix helper for kprobesHarvey Harrison2008-01-301-8/+19
| | | | | | | | Fold some small ifdefs into a helper function. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: arch/x86/kernel/cpu/mcheck/k7.c checkpatch fixesAndrew Morton2008-01-303-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | #88: FILE: arch/x86/kernel/cpu/mcheck/k7.c:34: + rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high); ^ ERROR: need space after that ',' (ctx:VxV) #142: FILE: arch/x86/kernel/cpu/mcheck/p4.c:170: + rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high); ^ ERROR: need space after that ',' (ctx:VxV) #180: FILE: arch/x86/kernel/cpu/mcheck/p6.c:34: + rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high); ^ total: 3 errors, 0 warnings, 114 lines checked Your patch has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Min Zhang <mzhang@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: arch/x86/kernel/cpu/mcheck/ checkpatch fixesAndrew Morton2008-01-303-26/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | #40: FILE: arch/x86/kernel/cpu/mcheck/k7.c:46: + snprintf (misc, 20, "[%08x%08x]", ahigh, alow); WARNING: line over 80 characters #45: FILE: arch/x86/kernel/cpu/mcheck/k7.c:50: + snprintf (addr, 24, " at %08x%08x", ahigh, alow); WARNING: no space between function name and open parenthesis '(' #45: FILE: arch/x86/kernel/cpu/mcheck/k7.c:50: + snprintf (addr, 24, " at %08x%08x", ahigh, alow); WARNING: no space between function name and open parenthesis '(' #48: FILE: arch/x86/kernel/cpu/mcheck/k7.c:52: + printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n", WARNING: no space between function name and open parenthesis '(' #65: FILE: arch/x86/kernel/cpu/mcheck/p4.c:161: + printk (KERN_DEBUG "CPU %d: EIP: %08x EFLAGS: %08x\n" WARNING: no space between function name and open parenthesis '(' #88: FILE: arch/x86/kernel/cpu/mcheck/p4.c:182: + snprintf (misc, 20, "[%08x%08x]", ahigh, alow); WARNING: line over 80 characters #93: FILE: arch/x86/kernel/cpu/mcheck/p4.c:186: + snprintf (addr, 24, " at %08x%08x", ahigh, alow); WARNING: no space between function name and open parenthesis '(' #93: FILE: arch/x86/kernel/cpu/mcheck/p4.c:186: + snprintf (addr, 24, " at %08x%08x", ahigh, alow); WARNING: no space between function name and open parenthesis '(' #96: FILE: arch/x86/kernel/cpu/mcheck/p4.c:188: + printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n", WARNING: no space between function name and open parenthesis '(' #120: FILE: arch/x86/kernel/cpu/mcheck/p6.c:46: + snprintf (misc, 20, "[%08x%08x]", ahigh, alow); WARNING: line over 80 characters #125: FILE: arch/x86/kernel/cpu/mcheck/p6.c:50: + snprintf (addr, 24, " at %08x%08x", ahigh, alow); WARNING: no space between function name and open parenthesis '(' #125: FILE: arch/x86/kernel/cpu/mcheck/p6.c:50: + snprintf (addr, 24, " at %08x%08x", ahigh, alow); WARNING: no space between function name and open parenthesis '(' #128: FILE: arch/x86/kernel/cpu/mcheck/p6.c:52: + printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n", total: 0 errors, 13 warnings, 100 lines checked Your patch has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Min Zhang <mzhang@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* arch/x86/kernel/cpu/mcheck/p4.c: cleanupsMin Zhang2008-01-303-17/+26
| | | | | | | | | | | | | SMP, the machine check exception dispatches all logical processors within a physical package to the machine-check exception handler, so the printk within each handler outputs concurrently and makes the output unreadable. Refer to Intel system programming guide Part 1 Section 7.8.5 http://developer.intel.com/design/processor/manuals/253668.pdf Signed-off-by: Min Zhang <mzhang@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: 32-bit EFI runtime service support: fixes in sync with 64-bit supportHuang, Ying2008-01-304-30/+15
| | | | | | | | | | | | | | | | | | | | | | support according to fixes of x86_64 support. - Delete efi_rt_lock because it is used during system early boot, before SMP is initialized. - Change local_flush_tlb() to __flush_tlb_all() to flush global page mapping. - Clean up includes. - Revise Kconfig description. - Enable noefi kernel parameter on i386. Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* replace x86_read/write_per_cpu with a common function.Glauber de Oliveira Costa2008-01-301-5/+5
| | | | | | | | | x86_read_per_cpu() and its writeish sister are not present in x86_64. So in this patch, we replace them with __get_cpu_var(), which is present in both Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: patching functions on 64-bitGlauber de Oliveira Costa2008-01-302-0/+57
| | | | | | | | | | | | Like i386, x86_64 also need to include its own patching function. (Well, if you're not in a hurry, and don't care about speed, you don't really _need_ ;-)) So here they are. Not much different in essence from i386 Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: move patching code to arch-specific file.Glauber de Oliveira Costa2008-01-303-51/+50
| | | | | | | | | The core patching code for paravirt is sufficiently different among i386 and x86_64, and we move them to specific files. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: replace privileged instructions with paravirt macrosGlauber de Oliveira Costa2008-01-301-42/+59
| | | | | | | | | | The assembly code in entry_64.S issues a bunch of privileged instructions, like cli, sti, swapgs, and others. Paravirt guests are forbidden to do so, and we then replace them with macros that will do the right thing. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: adds paravirt hook for swapgsGlauber de Oliveira Costa2008-01-301-0/+1
| | | | | | | | | This patch adds paravirt hook for swapgs operation, which is a privileged operation in x86_64. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: provide paravirtualized hook for rdtscpGlauber de Oliveira Costa2008-01-301-0/+1
| | | | | | | | | This patch adds a field in pv_cpu_ops for a paravirtualized hook for rdtscp, needed for x86_64. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: change paravirt_32.c nameGlauber de Oliveira Costa2008-01-302-1/+4
| | | | | | | | | This patch changes paravirt_32.c to paravirt.c. The goal is to have paravirt support in x86_64, so we do it in a common file Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86, ptrace: add buffer size checksMarkus Metzger2008-01-301-4/+21
| | | | | | | | | Pass the buffer size for (most) ptrace commands that pass user-allocated buffers and check that size before accessing the buffer. Unfortunately, PTRACE_BTS_GET already uses all 4 parameters. Commands that access user buffers return the number of bytes or records read or written. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86, ptrace: support 32bit-cross-64bit BTS recordingMarkus Metzger2008-01-302-47/+46
| | | | | | | | Support BTS recording of 32bit and 64bit tasks from 32bit or 64bit tasks. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86, ptrace: rlimit BTS buffer allocationMarkus Metzger2008-01-301-46/+103
| | | | | | | | Check the rlimit of the tracing task for total and locked memory when allocating the BTS buffer. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: move deeply indented code to reenter_kprobeMasami Hiramatsu2008-01-301-23/+23
| | | | | | | | | | | Move some deeply indented code related to re-entrance processing from kprobe_handler() to reenter_kprobe(). Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: add reenter_kprobe helperHarvey Harrison2008-01-301-11/+15
| | | | | | | | | | | | | [ mhiramat@redhat.com: updated it to latest x86.git ] Factor common X86_32, X86_64 kprobe reenter logic from deeply indented section to helper function. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com>
* x86: fix kprobe_handler reenable preemptionMasami Hiramatsu2008-01-301-1/+2
| | | | | | | | | Fix a preemption bug in kprobe_handler(). It has to call preempt_enable() before returning. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: voluntary leave_mm before entering ACPI C3Venki Pallipadi2008-01-302-2/+4
| | | | | | | | | | | | | | | | | | | | | Aviod TLB flush IPIs during C3 states by voluntary leave_mm() before entering C3. The performance impact of TLB flush on C3 should not be significant with respect to C3 wakeup latency. Also, CPUs tend to flush TLB in hardware while in C3 anyways. On a 8 logical CPU system, running make -j2, the number of tlbflush IPIs goes down from 40 per second to ~ 0. Total number of interrupts during the run of this workload was ~1200 per second, which makes it ~3% savings in wakeups. There was no measurable performance or power impact however. [ akpm@linux-foundation.org: symbol export fixes. ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 ptrace generic requestsRoland McGrath2008-01-301-36/+1
| | | | | | | | | This removes duplicated code by calling the generic ptrace_request and compat_ptrace_request functions for the things they already handle. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 core dump TLSRoland McGrath2008-01-301-0/+1
| | | | | | | | | | | | This makes ELF core dumps of 32-bit processes include a new note type NT_386_TLS (0x200) giving the contents of the TLS slots in struct user_desc format. This lets post mortem examination figure out what the segment registers mean like the debugger does with get_thread_area on a live process. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 user_regset cleanupRoland McGrath2008-01-303-131/+9
| | | | | | | | | This removes a bunch of dead code that is no longer needed now that the user_regset interfaces are being used for all these jobs. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 ptrace user_regsetRoland McGrath2008-01-301-159/+77
| | | | | | | | | | This cleans up the PTRACE_*REGS* request code so each one is just a simple call to copy_regset_to_user or copy_regset_from_user. The ptrace layouts already match the user_regset formats (core dump formats). Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 user_regset_viewRoland McGrath2008-01-301-0/+87
| | | | | | | | | This defines task_user_regset_view and the tables describing the x86 user_regset layouts for 32 and 64. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 user_regset general regsRoland McGrath2008-01-301-0/+109
| | | | | | | | | This adds accessor functions in the user_regset style for the general registers (struct user_regs_struct). Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 user_regset TLSRoland McGrath2008-01-302-6/+104
| | | | | | | | This adds accessor functions in the user_regset style for the TLS data. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 TLS desc_struct cleanupRoland McGrath2008-01-301-44/+45
| | | | | | | | | This cleans up the TLS code to use struct desc_struct and to separate the encoding and installation magic from the interface wrappers. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 i387 cleanupRoland McGrath2008-01-301-119/+0
| | | | | | | | | | | This removes all the old code that is no longer used after the i387 unification and cleanup. The i387_64.h is renamed to i387.h with no changes, but since it replaces the nonempty one-line stub i387.h it looks like a big diff and not a rename. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 i387 user_regsetRoland McGrath2008-01-303-235/+250
| | | | | | | | | | | | | | | This revamps the i387 code to be shared across 32-bit, 64-bit, and 32-on-64. It does so by consolidating the code in one place based on the user_regset accessor interfaces. This switches 32-bit to using the i387_64.h header and 64-bit to using the i387.c that was previously i387_32.c, but that's what took the least cleanup in each file. Here i387.h is stubbed to always include i387_64.h rather than renaming the file, to keep this diff smaller and easier to read. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: i387 renamingRoland McGrath2008-01-302-1/+2
| | | | | | | | | | This renames arch/x86/kernel/{i387_32.c => i387.c}. This is a pure renaming, but paves the way for merging the 32-bit and 64-bit versions of this code. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: x86 i387 header cleanupRoland McGrath2008-01-301-31/+0
| | | | | | | | | | | | | | | This moves some code into asm-x86/i387_64.h in preparation for unifying this code between 32 and 64. The 32-bit versions of some things are copied in some existing names changed to match 32-bit names and share code. For 64, save_i387 is moved into an inline from i387_64.c; this matches restore_i387, which is already an inline, and makes sense since there is exactly one caller (in signal_64.c). The save_i387 function could use more cosmetic cleanup, but it is just moved verbatim in this patch. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: kprobes leftover cleanupsHarvey Harrison2008-01-301-8/+6
| | | | | | | | | | | | | Eliminate __always_inline, all of these static functions are only called once. Minor whitespace cleanup. Eliminate one supefluous return at end of void function. Change the one #ifndef to #ifdef to match the sense of the rest of the config tests. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* arch/x86/: spelling fixesJoe Perches2008-01-303-3/+3
| | | | | | | | Spelling fixes. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: unify extable_{32|64}.cHarvey Harrison2008-01-301-11/+1
| | | | | | | | | | | Introduce fixup_exception() on 64-bit and use it in kprobes to eliminate an #ifdef. Only 64-bit needs search_extable() due to a stepping bug. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: move definitions to processor.hGlauber de Oliveira Costa2008-01-302-2/+2
| | | | | | | | | | This patch moves definitions that are present in only one of the files (between processor_32.h and processor_64.h), to processor.h. They're mostly structures and function definitions. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: unify x86_cpuinfo struct.Glauber de Oliveira Costa2008-01-301-3/+3
| | | | | | | | | | x86_cpuinfo is one more to the family of "not fundamentally different" structs. It's unified in processor.h, with very specific fields enclosed around ifdefs. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: provide 64-bit with a load_sp0 function.Glauber de Oliveira Costa2008-01-302-2/+2
| | | | | | | | | | | | Paravirt guests need to inform the underlying hypervisor whenever the sp0 tss field changes. i386 already has such a function, and we use it for x86_64 too. There's an unnecessary (for 64-bit) msr handling part in the original version, and it is placed around an ifdef. Making no more sense in processor_32.h, it is moved to the common header Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: unify tss_structGlauber de Oliveira Costa2008-01-305-6/+6
| | | | | | | | | | | Although slighly different, the tss_struct is very similar in x86_64 and i386. The really different part, which matchs the hardware vision of it, is now called x86_hw_tss, and each of the architectures provides yours. It's then used as a field in the outter tss_struct. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: get rid of _MASK flagsGlauber de Oliveira Costa2008-01-303-12/+12
| | | | | | | | | | | | | There's no need for the *_MASK flags (TF_MASK, IF_MASK, etc), found in processor.h (both _32 and _64). They have a one-to-one mapping with the EFLAGS value. This patch removes the definitions, and use the already existent X86_EFLAGS_ version when applicable. [ roland@redhat.com: KVM build fixes. ] Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: clean up arch/x86/kernel/early-quirks.cNeil Horman2008-01-301-44/+47
| | | | | | | | | | | | clean up checkpatch errors. No code changed. text data bss dec hex filename 705 120 0 825 339 early-quirks.o.before 705 120 0 825 339 early-quirks.o.after Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: cleanup i387_32.c according to checkpatchCyrill Gorcunov2008-01-301-142/+149
| | | | | | | | | | | clean up checkpatch warnings/errors on i387_32.c The old and new i387_32.s (asm listings) were checked with diff to be identical so it's safe to apply this patch. Signed-off-by: Cyrill Gorcunov <gorunov@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86, kexec: force x86 arches to boot kdump kernels on boot cpuNeil Horman2008-01-301-21/+65
| | | | | | | | | | | | | | | | | | | | | | | | Recently a kdump bug was discovered in which a system would hang inside calibrate_delay during the booting of the kdump kernel. This was caused by the fact that the jiffies counter was not being incremented during timer calibration. The root cause of this problem was found to be a bios misconfiguration of the hypertransport bus. On system affected by this hang, the bios had assigned APIC ids which used extended apic bits (more than the nominal 4 bit ids's), but failed to configure bit 17 of the hypertransport transaction config register, which indicated that the mask for the destination field of interrupt packets accross the ht bus (see section 3.3.9 of http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26094.PDF). If a crash occurs on a cpu with an APIC id that extends beyond 4 bits, it will not recieve interrupts during the kdump kernel boot, and this hang will be the result. The fix is to add this patch, whcih add an early pci quirk check, to forcibly enable this bit in the httcfg register. This enables all cpus on a system to receive interrupts, and allows kdump kernel bootup to procede normally. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: adjust enable_NMI_through_LVT0()Jan Beulich2008-01-306-9/+9
| | | | | | | | | | | | | Its previous use in a call to on_each_cpu() was pointless, as at the time that code gets executed only one CPU is online. Further, the function can be __cpuinit, and for this to work without CONFIG_HOTPLUG_CPU setup_nmi() must also get an attribute (this one can even be __init; on 64-bits check_timer() also was lacking that attribute). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: make __{save,restore}_processor_state staticJan Beulich2008-01-301-3/+5
| | | | | | | | | | | | .. allowing to remove their declarations from a global include file (the symbols don't exist for anything but x86). Likewise for 64-bits' fix_processor_context(), just that that one was properly declared in an arch-specific header. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: move to .rodata/.init.dataJan Beulich2008-01-302-2/+2
| | | | | | | | | The array is never written, and on 64-bits it's not even being used past initial boot. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86-64: honor notify_die() returning NOTIFY_STOPJan Beulich2008-01-302-12/+19
| | | | | | | | | | This requires making die() return a value, making its callers honor this (and be prepared that it may return), and making oops_end() have two additional parameters. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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