- 30 Jan, 2008 40 commits
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Glauber de Oliveira Costa authored
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>
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Glauber de Oliveira Costa authored
This patch adds paravirt hook for swapgs operation, which is a privileged operation in x86_64. Signed-off-by:
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Glauber de Oliveira Costa authored
i386 has a macro GET_CR0_INTO_EAX, used in early trap handling code. x86_64 has similar needs, only it needs to put cr2 into rcx. We provide a macro for such task, in the same way Signed-off-by:
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Glauber de Oliveira Costa authored
This patch changes the irq handling function definitions in paravirt.h (like raw_local_irq_disable) to accomodate for x86_64. The differences are in the calling convention. Signed-off-by:
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Glauber de Oliveira Costa authored
This patch adjust the paravirt macros used in assembly code to accomodate for x86_64 as well. Signed-off-by:
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Glauber de Oliveira Costa authored
To account for differences in x86_64, we change the macros that create raw instances of the paravirt_patch_site struct. We need to align 64-pointers to 64-bit boundaries, so we add an alignment directive. Also, we need to make room for a word-sized pointer, instead of a fixed 32-bit one Signed-off-by:
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Glauber de Oliveira Costa authored
This patch adds a field in pv_cpu_ops for a paravirtualized hook for rdtscp, needed for x86_64. Signed-off-by:
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Glauber de Oliveira Costa authored
write_tsc() does not need to be enclosed in any paravirt closure, as it uses wrmsr(). So we rip off the duplicate in msr.h and the definition from paravirt.h Signed-off-by:
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Glauber de Oliveira Costa authored
This patch adjust the PVOP_VCALL and PVOP_CALL macros to work with x86_64. It has a different calling convention, and we use auxiliary macros to account for both calling conventions as cleanly as possible Comments are adjusted accordingly. Signed-off-by:
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Glauber de Oliveira Costa authored
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:
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Markus Metzger authored
Establish the user API for sending a user-defined signal to the traced task on a BTS buffer overflow. This should complete the user API for the BTS ptrace extension. The patches so far implement wrap-around overflow handling as is needed for debugging. The remaining open is another overflow handling mechanism that sends a signal to the traced task on a buffer overflow. This will take some more time from my side. Since, from a user perspective, this occurs behind the scenes, the patch set should already be useful. More features may/will be added on top of it (overflow signal, pageable back-up buffers, kernel tracing, core file support, profiling, ...). Signed-off-by:
Markus Metzger <markus.t.metzger@intel.com> Signed-off-by:
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Markus Metzger authored
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:
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Markus Metzger authored
Support BTS recording of 32bit and 64bit tasks from 32bit or 64bit tasks. Signed-off-by:
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Markus Metzger authored
Check the rlimit of the tracing task for total and locked memory when allocating the BTS buffer. Signed-off-by:
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Masami Hiramatsu authored
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:
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Harvey Harrison authored
[ 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:
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Masami Hiramatsu authored
Fix a preemption bug in kprobe_handler(). It has to call preempt_enable() before returning. Signed-off-by:
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Venki Pallipadi authored
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:
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Ingo Molnar authored
we use a few static mapping rules in our pirq routing functions, and for example regression f3ac8432 was due to the pirq being out of range of the remapping array. Put in a few WARN_ON_ONCE() lines so that we get notified about any such out-of-bound incidents. Signed-off-by:
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Gary Hade authored
increasing number of PCI slots in large multi-node systems. The kernel currently attempts by default to allocate memory for all PCI expansion ROMs so there has also been an increasing number of PCI memory allocation failures seen on these systems. This occurs because the BIOS either (1) provides insufficient PCI memory resource for all the expansion ROMs or (2) provides adequate PCI memory resource for expansion ROMs but provides the space in kernel unexpected BIOS assigned P2P non-prefetch windows. The resulting PCI memory allocation failures may be benign when related to memory requests for expansion ROMs themselves but in some cases they can occur when attempting to allocate space for more critical BARs. This can happen when a successful expansion ROM allocation request consumes memory resource that was intended for a non-ROM BAR. We have seen this happen during PCI hotplug of an adapter that contains a P2P bridge where successful memory allocation for an expansion ROM BAR on device behind the bridge consumed memory that was intended for a non-ROM BAR on the P2P bridge. In all cases the allocation failure messages can be very confusing for users. This patch addresses the issue by changing the kernel default behavior so that expansion ROM memory allocations are no longer attempted by default when the BIOS has not assigned a specific address range to the expansion ROM BAR. This was done by changing the 'pci=rom' boot option behavior for BIOS unassigned expansion ROMs to actually match it's current kernel-parameters.txt description which already implies "off" by default. Behavior for BIOS assigned expansion ROMs implemented in pcibios_assign_resources() [arch/x86/pci/i386.c] is unchanged. Signed-off-by:
Gary Hade <garyhade@us.ibm.com> Cc: Greg KH <greg@kroah.com> Cc: Jan Beulich <jbeulich@novell.com> Acked-by:
"Jun'ichi Nomura" <j-nomura@ce.jp.nec.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Parag Warudkar authored
dmi_alloc() for CONFIG_X86_64 is defined to allocate from a static array and it maintains a allocation index which is advanced each time allocation is attempted - it gets incremented even if an allocation fails thereby depriving any future request that may be small enough to be satisfied from the array. Fix this by first testing if allocation is going to be possible and incrementing alloc index only then. Signed-off-by:
Parag Warudkar <parag.warudkar@gmail.com> Signed-off-by:
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Parag Warudkar authored
People with HP Desktops (including me) encounter couple of DMI errors during boot - dmi_save_oem_strings_devices: out of memory and dmi_string: out of memory. On some HP desktops the DMI data include OEM strings (type 11) out of which only few are meaningful and most other are empty. DMI code religiously creates copies of these 27 strings (65 bytes each in my case) and goes OOM in dmi_string(). If DMI_MAX_DATA is bumped up a little then it goes and fails in dmi_save_oem_strings while allocating dmi_devices of sizeof(struct dmi_device) corresponding to these strings. On x86_64 since we cannot use alloc_bootmem this early, the code uses a static array of 2048 bytes (DMI_MAX_DATA) for allocating the memory DMI needs. It does not survive the creation of empty strings and devices. Fix this by detecting and not newly allocating empty strings and instead using a one statically defined dmi_empty_string. Also do not create a new struct dmi_device for each empty string - use one statically define dmi_device with .name=dmi_empty_string and add that to the dmi_devices list. On x64 this should stop the OOM with same current size of DMI_MAX_DATA and on x86 this should save a good amount of (27*65 bytes + 27*sizeof(struct dmi_device) bootmem. Compile and boot tested on both 32-bit and 64-bit x86. Signed-off-by:
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Ingo Molnar authored
remove unused include/asm-x86/processor_32/64.h. Signed-off-by:
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Glauber de Oliveira Costa authored
What's left in processor_32.h and processor_64.h cannot be cleanly integrated. However, it's just a couple of definitions. They are moved to processor.h around ifdefs, and the original files are deleted. Note that there's much less headers included in the final version. Signed-off-by:
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Glauber de Oliveira Costa authored
This patch removes the __init modifier from an extern function declaration in acpi.h. Besides not being strictly needed, it requires the inclusion of linux/init.h, which is usually not even included directly, increasing header mess by a lot. Signed-off-by:
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Roland McGrath authored
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:
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Roland McGrath authored
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:
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Roland McGrath authored
Remove the old ia32_binfmt.c file, which is no longer used. Signed-off-by:
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Roland McGrath authored
This switches x86-64's 32-bit ELF support to use the shared fs/compat_binfmt_elf.c code instead of our own ia32_binfmt.c. Signed-off-by:
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Roland McGrath authored
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:
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Roland McGrath authored
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:
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Roland McGrath authored
This switches x86 to the user_regset-based code for ELF core dumps. The core dumps come out exactly the same as before. Signed-off-by:
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Roland McGrath authored
This defines task_user_regset_view and the tables describing the x86 user_regset layouts for 32 and 64. Signed-off-by:
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Roland McGrath authored
This adds accessor functions in the user_regset style for the general registers (struct user_regs_struct). Signed-off-by:
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Roland McGrath authored
This adds accessor functions in the user_regset style for the TLS data. Signed-off-by:
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Roland McGrath authored
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:
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Roland McGrath authored
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:
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Roland McGrath authored
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:
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Roland McGrath authored
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 authored
This converts the ptrace/signal accessors for i387 math_emu state to the user_regset interface style, and calls these from the old interfaces. It also cleans up math_emulate's ptrace check to be a single-step check, which is what it really wants. Signed-off-by:
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