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* [PATCH] x86_64: Use function pointers to call DMA mapping functionsMuli Ben-Yehuda2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | AK: I hacked Muli's original patch a lot and there were a lot of changes - all bugs are probably to blame on me now. There were also some changes in the fall back behaviour for swiotlb - in particular it doesn't try to use GFP_DMA now anymore. Also all DMA mapping operations use the same core dma_alloc_coherent code with proper fallbacks now. And various other changes and cleanups. Known problems: iommu=force swiotlb=force together breaks needs more testing. This patch cleans up x86_64's DMA mapping dispatching code. Right now we have three possible IOMMU types: AGP GART, swiotlb and nommu, and in the future we will also have Xen's x86_64 swiotlb and other HW IOMMUs for x86_64. In order to support all of them cleanly, this patch: - introduces a struct dma_mapping_ops with function pointers for each of the DMA mapping operations of gart (AMD HW IOMMU), swiotlb (software IOMMU) and nommu (no IOMMU). - gets rid of: if (swiotlb) return swiotlb_xxx(); - PCI_DMA_BUS_IS_PHYS is now checked against the dma_ops being set This makes swiotlb faster by avoiding double copying in some cases. Signed-Off-By: Muli Ben-Yehuda <mulix@mulix.org> Signed-Off-By: Jon D. Mason <jdmason@us.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Reject SRAT tables that don't cover all memoryAndi Kleen2006-01-11
| | | | | | | | | | | | Broken BIOS on Iwill 8way systems reports these and it causes the bootmem allocator to crash. Add a sanity check if all the PXMs in the SRAT table cover all memory as reported by e820. If the sanity check fails the SRAT is rejected and the code will fall back to discover the NUMA topology using the K8 northbridge registers when applicable. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Add idle notifiersAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | This adds a new notifier chain that is called with IDLE_START when a CPU goes idle and IDLE_END when it goes out of idle. The context can be idle thread or interrupt context. Since we cannot rely on MONITOR/MWAIT existing the idle end check currently has to be done in all interrupt handlers. They were originally inspired by the similar s390 implementation. They have a variety of applications: - They will be needed for CONFIG_NO_IDLE_HZ - They can be used for oprofile to fix up the missing time in idle when performance counters don't tick. - They can be used for better C state management in ACPI - They could be used for microstate accounting. This is just infrastructure so far, no users. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Clean up some printks in NUMA codeAndi Kleen2006-01-11
| | | | | Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Fix up coding style in numa.cAndi Kleen2006-01-11
| | | | | | | No functional changes Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Fix off by one in IOMMU checkAndi Kleen2006-01-11
| | | | | | | | | | | Fix off by one when checking if the machine has enougn memory to need IOMMU This caused the IOMMUs to be needlessly enabled for mem=4G Based on a patch from Jon Mason Signed-off-by: jdmason@us.ibm.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Handle missing local APIC timer interrupts on C3 stateVenkatesh Pallipadi2006-01-11
| | | | | | | | | | | | Whenever we see that a CPU is capable of C3 (during ACPI cstate init), we disable local APIC timer and switch to using a broadcast from external timer interrupt (IRQ 0). Patch below adds the code for x86_64. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: Handle missing local APIC timer interrupts on C3 stateVenkatesh Pallipadi2006-01-11
| | | | | | | | | | | | | Whenever we see that a CPU is capable of C3 (during ACPI cstate init), we disable local APIC timer and switch to using a broadcast from external timer interrupt (IRQ 0). This is needed because Intel CPUs stop the local APIC timer in C3. This is currently only enabled for Intel CPUs. Patch below adds the code for i386 and also the ACPI hunk. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86-64: Remove sub jiffy profile timer supportVenkatesh Pallipadi2006-01-11
| | | | | | | | | | | | | | | | | Remove the finer control of local APIC timer. We cannot provide a sub-jiffy control like this when we use broadcast from external timer in place of local APIC. Instead of removing this only on systems that may end up using broadcast from external timer (due to C3), I am going the "I'm feeling lucky" way to remove this fully. Basically, I am not sure about usefulness of this code today. Few other architectures also don't seem to support this today. If you are using profiling and fine grained control and don't like this going away in normal case, yell at me right now. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Report hardware breakpoints in user space when triggered by ↵John Blackwood2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the kernel I would like to throw out a suggestion for a possible change in the way that the debug register traps are handled in do_debug() when the trap occurs in kernel-mode. In the x86_64 version of do_debug(), the code will skip around sending a SIGTRAP to the current task if the trap occurred while in kernel mode. On the i386-side of things, if the access happens to occur in kernel mode (say during a read(2) of user's buffer that matches the address of a debug register trap), then the do_debug() routine for i386 will go ahead and call send_sigtrap() and send the SIGTRAP signal. The send_sigtrap() code will also set the info.si_addr to NULL in this case (even though I don't understand why, since the SIGTRAP siginfo processing doesn't use the si_addr field...). So I would like to suggest that the x86_64 do_debug() routine also follow this type of behavior and have it go ahead and send the SIGTRAP signal to the current task, even if the debug register trap happens to have occurred in kernel mode. I have taken a stab at a patch for this change below. (It includes the i386-ish change for setting si_addr to NULL when the trap occurred in kernel mode.) It seems like a useful feature to be able to 'watch' a user location that might also be modified in the kernel via a system service call, and have the debugger report that information back to the user, rather than to just silently ignore the trap. Additionally, I realize that users that pull in a kernel debugger such as KGDB into their kernel might want to remove this change below when they add in KGDB support. However, they could alternatively look at the current task's thread.debugreg[] values to see if the trap occurred due to KGDB or instead because of a user-space debugger trap, and still honor the user SIGTRAP processing (instead of the KGDB breakpoint processing) if the trap matches up with the thread.debugreg[] registers. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: "extern inline" -> "static inline" in pgtable.hAdrian Bunk2006-01-11
| | | | | | Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Convert page fault error codes to symbolic constants.Andi Kleen2006-01-11
| | | | | | | | | | Much better to deal with these than with the magic numbers. And remove the comment describing the bits - kernel source is no replacement for an architecture manual. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Implement is_compat_task the right wayAndi Kleen2006-01-11
| | | | | | | By setting a flag during a 32bit system call only Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Implement compat code for sg driver SG_GET_REQUEST_TABLE ioctlAndi Kleen2006-01-11
| | | | | | | | | Apparently helps with some non SANE scanner drivers. Cc: axboe@suse.de Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Remove unnecessary case from the page fault handlerAndi Kleen2006-01-11
| | | | | | | | | | | | | | Don't need to do the vmalloc check for the module range because its PML4 is shared with the kernel text. Also removed an unnecessary TLB flush. Pointed out by Jan Beulich Cc: jbeulich@novell.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Align and pad x86_64 GDT on page boundaryRavikiran G Thirumalai2006-01-11
| | | | | | | | | | | | | | | | This patch is on the same lines as Zachary Amsden's i386 GDT page alignemnt patch in -mm, but for x86_64. Patch to align and pad x86_64 GDT on page boundries. [AK: some minor cleanups and fixed incorrect TLS initialization in CPU init.] Signed-off-by: Nippun Goel <nippung@calsoftinc.com> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Allow compilation on a 32bit biarch toolchainAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | This might help on distributions that use a 32bit biarch compiler. First pass -m64 by default. Secondly add some more .code32s because at least the Ubuntu biarch 32bit as called by gcc doesn't seem to handle -m64 -m32 as generated by the Makefile without such assistance. And finally make sure the linker script can be preprocessed with a 32bit cpp. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Make udelay more accurateRoss Biro2006-01-11
| | | | | | | | | | | | | | | The attempt to avoid overflow in __delay caused varying precision on different CPUs depending on differences in the CPU speed. We should be able to do this multiplication with out overflowing provided the cpu is running at less than about 128 GHz. xloops < 20000 * 0x10c6. loops_per_jiffy * HZ <= cpu_clock_speed. So if the cpu clock speed < 2^64/(20000 * 0x10c6) = 2^64/ 51E6CC0 < 2^64/2^27 = 2^37 = 128G we will not overflow the calculation. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Return -1 for unknown PCI bus affinityAndi Kleen2006-01-11
| | | | | | | | | | | | When we don't know the node a PCI bus is connected to return -1. This matches the generic code. Noticed by Ravikiran G Thirumalai <kiran@scalex86.org> Cc: Ravikiran G Thirumalai <kiran@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Handle unknown node (-1) in alloc_pages_nodeAndi Kleen2006-01-11
| | | | | | | | | | | | Following kmalloc_node. Needed for another patch to return -1 for unknown nodes in x86-64. Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: kiran@scalex86.org Signed-off-by: Andi Kleen <ak@suse.de> [ Changed 0 to numa_node_id() on suggestion by Christoph Lameter ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Validate SLIT tableAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | | | | | | | A lot of Opteron BIOS just pass 10 in all SLIT entries (10 is the normalized unit). This is actually worse than the default heuristic because it leads to pci_distance not knowing the difference between local and remote nodes anymore. This messes up some NUMA heuristics in generic code. In this case it's better to fall back to the default heuristic which just does nodea == nodeb ? 10 : 20. This patch does some basic sanity checking on the SLIT and only accepts the SLIT when it passes. Invariants enforced are: - Node to itself shall be 10 - Any other distance shouldn't be 10 - Distances smaller than 10 are illegal Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Fix off by one in acpi table mappingAndi Kleen2006-01-11
| | | | | | | | | And fix the test to include the size Noticed by Vivek Goyal Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Fix 64bit FXSAVE encodingJan Beulich2006-01-11
| | | | | | | | | | | | The separation of the rex64 prefix (on fxsave/fxrstor) by way of using a semicolon resulted in the prefix not always taking effect (because when extended registers are needed for addressing, another rex prefix would have been generated by the compiler), thus (depending on the build) resulting in eventually getting 32-bit saves and/or restores. Signed-Off-By: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Generalize DMI and enable for x86-64Andi Kleen2006-01-11
| | | | | | | | | | | | | | | | | Some people need it now on 64bit so reuse the i386 code for x86-64. This will be also useful for future bug workarounds. It is a bit simplified there because there is no need to do it very early on x86-64. This means it doesn't need early ioremap et.al. We run it as a core initcall right now. I hope it's not needed for early setup. I added a general CONFIG_DMI symbol in case IA64 or someone else wants to reuse the code later too. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Remove bogus file in arch/x86_64/pciAndi Kleen2006-01-11
| | | | | | | | This was a backup file that somehow made it into the official tree. Never used for anything. Remove. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Add missing newline in IOMMU error messageAndi Kleen2006-01-11
| | | | | Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: fls in asm for x86_64Stephen Hemminger2006-01-11
| | | | | | | | | | | | Use single instruction for find largest set bit on x86_64. [Updated by Jan Beulich to fix wrong asm constraints in original patch -AK] Cc: jbeulich@novell.com Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: fix page fault from show_trace()Jan Beulich2006-01-11
| | | | | | | | | | | | | The introduction of call_softirq switching to the interrupt stack several releases earlier resulted in a problem with the code in show_trace, which assumes that it can pick the previous stack pointer from the end of the interrupt stack. Cc: Andi Kleen <ak@muc.de> Cc: Arjan van de Ven <arjanv@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: fix single step handling for 32bit processesPeter Beutner2006-01-11
| | | | | | | | | | | | | | | Be more careful with TF handling to fix some copy protection codes in wine patch originally for i386 by Linus, then ported to x86_64 by Andi Kleen see: [PATCH] x86_64: Some fixes for single step handling commit: be61bff789fe44bfb6d9282d8f7eccc860bdcfb6 But it was never applied to the ia32 emulation code which breaks some copy-protection schemes under wine when running on x86_64. Signed-off-by: Peter Beutner <p.beutner@gmx.net> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: don't save eflags in x86-64 switch_to()Benjamin LaHaise2006-01-11
| | | | | | | | | | | | As discussed, the flags register on x86-64 is saved and restored by the assembly code which sets up struct pt_regs, so we do not need to save and restore it in the inline assembler which already informs gcc that we're clobbering the flags. This patch has been sanity booted and works okay here. Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86-64: Don't IPI to offline cpus on shutdownEric W. Biederman2006-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So why are we calling smp_send_stop from machine_halt? We don't. Looking more closely at the bug report the problem here is that halt -p is called which triggers not a halt but an attempt to power off. machine_power_off calls machine_shutdown which calls smp_send_stop. If pm_power_off is set we should never make it out machine_power_off to the call of do_exit. So pm_power_off must not be set in this case. When pm_power_off is not set we expect machine_power_off to devolve into machine_halt. So how do we fix this? Playing too much with smp_send_stop is dangerous because it must also be safe to be called from panic. It looks like the obviously correct fix is to only call machine_shutdown when pm_power_off is defined. Doing that will make Andi's assumption about not scheduling true and generally simplify what must be supported. This turns machine_power_off into a noop like machine_halt when pm_power_off is not defined. If the expected behavior is that sys_reboot(LINUX_REBOOT_CMD_POWER_OFF) becomes sys_reboot(LINUX_REBOOT_CMD_HALT) if pm_power_off is NULL this is not quite a comprehensive fix as we pass a different parameter to the reboot notifier and we set system_state to a different value before calling device_shutdown(). Unfortunately any fix more comprehensive I can think of is not obviously correct. The core problem is that there is no architecture independent way to detect if machine_power will become a noop, without calling it. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64/i386: Remove preempt disable calls in lowlevel IPIZwane Mwaikambo2006-01-11
| | | | | | | | | | | | | | | | | | | I noticed that some lowlevel send_IPI_mask helpers had a hotplug/preempt race whereupon the cpu_online_map was read before disabling preemption; ... cpumask_t mask = cpu_online_map; int cpu = get_cpu(); cpu_clear(cpu, mask); ... But then i realised that there is no need for these lowlevel functions to be going through all this trouble when all the callers are already made hotplug/preempt safe. Signed-off-by: Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: increase MCE bank countsShaohua Li2006-01-11
| | | | | | | | | There is one CPU here whose MCE bank count is 6. This patch increases x86_64's MCE bank count. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: another mb() for smpboot.cBenjamin LaHaise2006-01-11
| | | | | | | | | The following is probably a good idea given that the atomic_set() isn't a barrier here either. Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Move int 3 handler to debug stack and allow to increase it.Jan Beulich2006-01-11
| | | | | | | | | | | | | | | | | | This - switches the INT3 handler to run on an IST stack (to cope with breakpoints set by a kernel debugger on places where the kernel's %gs base hasn't been set up, yet); the IST stack used is shared with the INT1 handler's [AK: this also allows setting a kprobe on the interrupt/exception entry points] - allows nesting of INT1/INT3 handlers so that one can, with a kernel debugger, debug (at least) the user-mode portions of the INT1/INT3 handling; the nesting isn't actively enabled here since a kernel- debugger-free kernel doesn't need it Signed-Off-By: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Don't confuse apic=... command line option with apicAndi Kleen2006-01-11
| | | | | | | Previously apic was foced with apic=logopt was specified. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Dont't disable early PCI scan with apicAndi Kleen2006-01-11
| | | | | | | It might be still needed for non APIC related issues. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86-64: Update AMD CPUID flagsAndi Kleen2006-01-11
| | | | | | | | | | | | | | | | Print bits for RDTSCP, SVM, CR8-LEGACY. Also now print power flags on i386 like x86-64 always did. This will add a new line in the 386 cpuinfo, but that shouldn't be an issue - did that in the past too and I haven't heard of any breakage. I shrunk some of the fields in the i386 cpuinfo_x86 to chars to make up for the new int "x86_power" field. Overall it's smaller than before. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Use X86_FEATURE_CONSTANT_TSC now to clean up Intel speedstep ↵Andi Kleen2006-01-11
| | | | | | | | | | | | | drivers They previously tried to figure this out on their own. Suggested by Venkatesh. Cc: venkatesh.pallipadi@intel.com Cc: davej@redhat.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86-64: Generalize X86_FEATURE_CONSTANT_TSC flagAndi Kleen2006-01-11
| | | | | | | | | | | | | | | Define it for i386 too. This is a synthetic flag that signifies that the CPU's TSC runs at a constant P state invariant frequency. Fix up the logic on x86-64/i386 to set it on all known CPUs. Use the AMD defined bit to set it on future AMD CPUs. Cc: venkatesh.pallipadi@intel.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Remove enable/disable_hltAndi Kleen2006-01-11
| | | | | | | | Was only used by the floppy driver to work around some ancient hardware bug that should never occur on any 64bit system. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Add documentation for CPU hotplug ACPI extensionAndi Kleen2006-01-11
| | | | | | | Cc: len.brown@intel.com, ashok.ray@intel.com Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Don't reserve hotplug CPUs by defaultAndi Kleen2006-01-11
| | | | | | | | | | | Most users don't need it so no need to waste memory. This means an user has to specify the appropiate number of hotplug CPUs on the command line with additional_cpus=... or fix their BIOS to follow the convention in Documentation/x86-64/cpu-hotplug-spec Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86-64: Use input/output dependencies for bitopsAndi Kleen2006-01-11
| | | | | | | Noticed by Andreas Schwab Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: No need to remove NT during CPU setupAndi Kleen2006-01-11
| | | | | | | | head.S already clears EFLAGS completely. Following an i386 patch from Zachary Amsden. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Minor GFP_DMA32 comment fixAndi Kleen2006-01-11
| | | | | | | Pretty obvious Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Adjust page fault handlingJan Beulich2006-01-11
| | | | | | | | Adjust page fault protection error check before considering it to be a vmalloc synchronization candidate. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Remove unprotected iretJan Beulich2006-01-11
| | | | | | | | | Make sure no iret can fault without attached recovery code. Cannot happen in the normal case, but might be useful with kernel debuggers Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Clean up double fault handlingJan Beulich2006-01-11
| | | | | | | | | | | | | | | | Since a double fault always implies that kernel data structures are corrupt, this fault should neither be handed to user mode handling, nor should the handler allow resuming the faulting code stream (since architecturally this isn't a fault, but an abort). Note that this slightly depends on the previously submitted patch adjusting the prototype of notify_die() (a compiler warning will result without that other patch). AK: Removed obsolete CONFIG_CHECKING code, added comments Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: make trap information available to die notification handlersJan Beulich2006-01-11
| | | | | | | | | This adjusts things so that handlers of the die() notifier will have sufficient information about the trap currently being handled. It also adjusts the notify_die() prototype to (again) match that of i386. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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