- 30 Jan, 2008 40 commits
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Glauber de Oliveira Costa authored
This patch splits get_cycles_sync() into __get_cycles_sync(), and the rdtscll part. Paravirt guests cannot issue rdtscl directly, as it involves a function call in vdso area. So, using the __get_cycles_sync() base, we introduce vget_cycles_sync, which then calls the native version of rdtscll. Ideally, however, a guest should define its own clocksource, together with a vread function 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>
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Glauber de Oliveira Costa authored
This patch turns the sched_clock into native_sched_clock. sched clock becomes a weak symbol, which can then give its place to a paravirt definition. Signed-off-by:
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Glauber de Oliveira Costa authored
The functions under #ifdef CONFIG_SMP in msr.h are the same for both x86_64 and i386, and this patches removes one of them, putting them in a single location Signed-off-by:
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Glauber de Oliveira Costa authored
Among other things, using -traditional as a gcc option stops us from using macro token pasting, which is a feature we heavily rely on. There was still a use of -traditional in arch/x86/kernel/Makefile_64, which this patch removes. I don't see any problems building kernels in my x86_64 box without -traditional. Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Acked-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by:
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Harvey Harrison authored
x86: Use def_bool where possible in Kconfig.cpu Change occurances of: bool default X to: def_bool X Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Hiroshi Shimamoto authored
White space and coding style clean up. Make process_32/64.c similar. Signed-off-by:
Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by:
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Harvey Harrison authored
Change occurances of: bool default X to: def_bool X Change ocurances of: bool "Foo" default X to: def_bool X prompt "Foo" Shows no difference in generated config for allmodconfig/allyesconfig. Signed-off-by:
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Joerg Roedel authored
This minor cleanup replaces _KERNPG_TABLE with the __PAGE_KERNEL* for 2MB PTEs in the 64-bit memory initialization code. The __PAGE_KERNEL* defines are more appropriate for PTEs. Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
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Joerg Roedel authored
This patch defines the _PAGE_* paging attributes in pgtable_64.h in terms of the former defined _PAGE_BIT_* values. Signed-off-by:
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Len Brown authored
commit c434b7a6 (x86: avoid wasting IRQs for PCI devices) created a concept of "IRQ compression" on i386 to conserve IRQ numbers on systems with many sparsely populated IO APICs. The same scheme was also added to x86_64, but later removed when x86_64 recieved an IRQ over-haul that made it unnecessary -- including per-CPU IRQ vectors that greatly increased the IRQ capacity on the machine. i386 has not received the analogous over-haul, and thus a previous attempt to delete IRQ compression from i386 was rejected on the theory that there may exist machines that actually need it. The fact is that the author of IRQ compression patch was unable to confirm the actual existence of such a system. As a result, all i386 kernels with IOAPIC support pay the following: 1. confusion IRQ compression re-names the traditional IOAPIC pin numbers (aka ACPI GSI's) into sequential IRQ #s: ACPI: PCI Interrupt 0000:00:1c.0[A] -> GSI 20 (level, low) -> IRQ 16 ACPI: PCI Interrupt 0000:00:1c.1[B] -> GSI 21 (level, low) -> IRQ 17 ACPI: PCI Interrupt 0000:00:1c.2[C] -> GSI 22 (level, low) -> IRQ 18 ACPI: PCI Interrupt 0000:00:1c.3[D] -> GSI 23 (level, low) -> IRQ 19 ACPI: PCI Interrupt 0000:00:1c.4[A] -> GSI 20 (level, low) -> IRQ 16 This makes /proc/interrupts look different depending on system configuration and device probe order. It is also different than the x86_64 kernel running on the exact same system. As a result, programmers get confused when comparing systems. 2. complexity The IRQ code in Linux is already overly complex, and IRQ compression makes it worse. There have already been two bug workarounds related to IRQ compression -- the IRQ0 timer workaround and the VIA PCI IRQ workaround. 3. size All i386 kernels with IOAPIC support contain an int[4096] -- a 4 page array to contain the renamed IRQs. So while the irq compression code on i386 should really be deleted -- even before merging the x86_64 irq-overhaul, this patch simply disables it on all high volume systems to avoid problems #1 and #2 on most all i386 systems. A large system with pin numbers >=64 will still have compression to conserve limited IRQ numbers for sparse IOAPICS. However, the vast majority of the planet, those with only pin numbers < 64 will use an identity GSI -> IRQ mapping. Signed-off-by:
Len Brown <len.brown@intel.com> Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com>
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H. Peter Anvin authored
This changes size-specific register names (eip/rip, esp/rsp, etc.) to generic names in the thread and tss structures. Signed-off-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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Roland McGrath authored
This removes the old separate 64-bit and ia32 ptrace source files. They are no longer used. Signed-off-by:
Roland McGrath <roland@redhat.com> Signed-off-by:
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Roland McGrath authored
This switches over the 64-bit build to use the shared ptrace code, instead of the old ptrace_64.c and arch/x86/ia32/ptrace32.c code. Signed-off-by:
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Roland McGrath authored
This moves the sys32_ptrace code into arch/x86/kernel/ptrace.c, verbatim except for a few hard-coded sizes replaced with sizeof. Here this code can use the shared local functions in this file. Signed-off-by:
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Roland McGrath authored
This reimplements the 64-bit IA32-emulation register access functions in arch/x86/kernel/ptrace.c, where they can share some guts with the native access functions directly. These functions are not used yet, but this paves the way to move IA32 ptrace support into this file to share its local functions. [akpm@linuxfoundation.org: Build fix] Signed-off-by:
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Roland McGrath authored
This moves the 64-bit syscall tracing functions into ptrace.c, so that ptrace_64.c becomes entirely obsolete. Signed-off-by:
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Roland McGrath authored
This adds 64-bit support to arch_ptrace in arch/x86/kernel/ptrace.c, so this function can be used for native ptrace on both 32 and 64. Signed-off-by:
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Roland McGrath authored
This merges 64-bit support into the low-level register access functions in arch/x86/kernel/ptrace.c, paving the way to share this file between 32-bit and 64-bit builds. Signed-off-by:
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Roland McGrath authored
This cleans up the getreg/putreg functions to move the special cases (segment registers and eflags) out into their own subroutines. Signed-off-by:
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Roland McGrath authored
This cleans up the FLAG_MASK macro to use symbolic constants instead of a magic number. Signed-off-by:
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Roland McGrath authored
This renames ptrace_32.c back to ptrace.c, in preparation for merging the 32/64 versions of these files. Signed-off-by:
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Roland McGrath authored
This replaces the debugreg[7] member of thread_struct with individual members debugreg0, etc. This saves two words for the dummies 4 and 5, and harmonizes the code between 32 and 64. Signed-off-by:
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Roland McGrath authored
This generalizes the getreg32 and putreg32 functions so they can be used on the current task, as well as on a task stopped in TASK_TRACED and switched off. This lays the groundwork to share this code for all kinds of user-mode machine state access, not just ptrace. Signed-off-by:
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Roland McGrath authored
This generalizes the getreg and putreg functions so they can be used on the current task, as well as on a task stopped in TASK_TRACED and switched off. This lays the groundwork to share this code for all kinds of user-mode machine state access, not just ptrace. Signed-off-by:
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Roland McGrath authored
This generalizes the getreg and putreg functions so they can be used on the current task, as well as on a task stopped in TASK_TRACED and switched off. This lays the groundwork to share this code for all kinds of user-mode machine state access, not just ptrace. Signed-off-by:
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Roland McGrath authored
This canonicalizes the indentation in the getreg and putreg functions. Signed-off-by:
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Roland McGrath authored
This canonicalizes the indentation in the getreg and putreg functions. Signed-off-by:
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Roland McGrath authored
This cleans up the getreg32/putreg32 functions to use struct pt_regs in a straightforward fashion, instead of equivalent ugly pointer arithmetic. Signed-off-by:
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Roland McGrath authored
This removes the EF_* enum from <asm/ptrace.h>. It is no longer used, and duplicates the X86_EFLAGS_* constants from <asm/processor-flags.h>. Signed-off-by:
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Roland McGrath authored
This cleans up arch/x86/kernel/setup64.c to use the X86_EFLAGS_* constants from <asm/processor-flags.h> instead of the EF_* enum in <asm/ptrace.h>. Signed-off-by:
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H. Peter Anvin authored
Switch struct sigcontext (defined in <asm/sigcontext*.h>) to using register names withut e- or r-prefixes for both 32- and 64-bit x86. This is intended as a preliminary step in unifying this code between architectures. Signed-off-by:
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H. Peter Anvin authored
Switch struct user_regs_struct (defined in <asm/user.h>, which is no longer exported to userspace) to using register names without e- or r-prefixes for both 32 and 64 bit x86. This is intended as a preliminary step in unifying this code between architectures. Also, be a bit more strict in truncating 32-bit "extended" segment register values to 16 bits. Signed-off-by:
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H. Peter Anvin authored
We have a lot of code which differs only by the naming of specific members of structures that contain registers. In order to enable additional unifications, this patch drops the e- or r- size prefix from the register names in struct pt_regs, and drops the x- prefixes for segment registers on the 32-bit side. This patch also performs the equivalent renames in some additional places that might be candidates for unification in the future. Signed-off-by:
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Jeremy Fitzhardinge authored
The patch to suppress bitops-related warnings added a pile of ugly casts. Many of these were related to the management of x86 CPU capabilities. Clean these up by adding specific set/clear_cpu_cap macros, and use them consistently. Signed-off-by:
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Jeremy Fitzhardinge authored
Add casts to appropriate places to silence spurious bitops warnings. Signed-off-by:
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Jeremy Fitzhardinge authored
This unifies the set/clear/test bit functions of asm/bitops.h. I have not attempted to merge the bit-finding functions, since they rely on the machine word size and can't be easily restructured to work generically without a lot of #ifdefs. In particular, the 64-bit code can assume the presence of conditional move instructions, whereas 32-bit needs to be more careful. The inline assembly for the bit operations has been changed to remove explicit sizing hints on the instructions, so the assembler will pick the appropriate instruction forms depending on the architecture and the context. Signed-off-by:
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Mike Travis authored
'for_each_possible_cpu(i)' when there's a _remote possibility_ of dereferencing a non-allocated per_cpu variable involved. All files except mm/vmstat.c are x86 arch. Thanks to pageexec@freemail.hu for pointing this out. Signed-off-by:
Mike Travis <travis@sgi.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: <pageexec@freemail.hu> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Roland McGrath authored
This adds the PTRACE_SINGLEBLOCK request on x86, matching the ia64 feature. The implementation comes from the generic ptrace code and relies on the low-level machine support provided by arch_has_block_step() et al. Signed-off-by:
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Roland McGrath authored
This adjusts the x86 kprobes implementation to cope with per-thread MSR_IA32_DEBUGCTLMSR being set for user mode. I haven't delved deep enough into the kprobes code to be really sure this covers all the cases where the user-mode BTF setting needs to be cleared or restored. It looks about right to me. Signed-off-by:
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Roland McGrath authored
This implements user-mode step-until-branch on x86 using the BTF bit in MSR_IA32_DEBUGCTLMSR. It's just like single-step, only less so. Signed-off-by:
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