- 12 Jan, 2006 40 commits
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Jan Beulich authored
Due to a broken condition, the body of the loop that is intended to wait for the Update-In-Progress bit to get set and then cleared again was never entered; in fact, the entire loop was optimized out by the compiler. Here is a change to fix the condition (and to also move the initialization of locals out of the spin lock protected region). Signed-Off-By:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Andi Kleen authored
It was only needed for APM Pointed out by Jan Beulich Cc: jbeulich@novell.com Signed-off-by:
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Andi Kleen authored
X86_FEATURE_K8_C was a synthetic Linux CPUID flag that was used for some code optimizations in Opteron C stepping or later. But support for pre C stepping optimizations has been removed, so this isn't needed anymore. Signed-off-by:
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Andi Kleen authored
early_cpu_detect only runs on the BP, but this code needs to run on all CPUs. Looks like a mismerge somewhere. Also add a warning comment. Signed-off-by:
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Stephen Hemminger authored
Fix some trivial sparse warnings in x86_64 code. Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
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Andi Kleen authored
Saves about ~18K .text in defconfig There would be more optimization potential, but that's for later. Suggestion originally from Bill Irwin. Fix from Andy Whitcroft. Signed-off-by:
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Andi Kleen authored
They used to be used by the reboot code, but not anymore. Noticed by Jan Beulich Cc: JBeulich@novell.com Signed-off-by:
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Vivek Goyal authored
o Currently, during kexec reboot, IOAPIC is re-programmed back to virtual wire mode if there was an i8259 connected to it. This enables getting timer interrupts in second kernel in legacy mode. o After putting into virtual wire mode, IOAPIC delivers the i8259 interrupts to CPU0. This works well for kexec but not for kdump as we might crash on a different CPU and second kernel will not see timer interrupts. o This patch modifies the redirection table entry to deliver the timer interrupts to the cpu we are rebooting (instead of hardcoding to zero). This ensures that second kernel receives timer interrupts even on a non-boot cpu. Signed-off-by:
Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by:
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Ravikiran G Thirumalai authored
Introduce vSMP arch to the kernel. This patch: 1. Adds CONFIG_X86_VSMP 2. Adds machine specific macros for local_irq_disabled, local_irq_enabled and irqs_disabled 3. Writes to the vSMP CTL device to indicate kernel compiled with CONFIG_VSMP Signed-off-by:
Ravikiran Thirumalai <kiran@scalemp.com> Signed-off-by:
Shai Fultheim <shai@scalemp.com> Signed-off-by:
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Ravikiran G Thirumalai authored
vSMP specific alignment patch to 1. Define INTERNODE_CACHE_SHIFT for vSMP 2. Use this for alignment of critical structures 3. Use INTERNODE_CACHE_SHIFT for ARCH_MIN_TASKALIGN, and let the slab align task_struct allocations to the internode cacheline size 4. Introduce and use ARCH_MIN_MMSTRUCT_ALIGN for mm_struct slab allocations. Signed-off-by:
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Andi Kleen authored
Fixes CC fs/nfsctl.o In file included from include2/asm/atomic.h:427, from /home/lsrc/quilt/linux/include/linux/file.h:8, from /home/lsrc/quilt/linux/fs/nfsctl.c:8: /home/lsrc/quilt/linux/include/asm-generic/atomic.h:20:5: warning: "BITS_PER_LONG" is not defined Signed-off-by: -
Brian Gerst authored
Move the #ifdef into the function body. Signed-off-by:
Brian Gerst <bgerst@didntduck.org> Signed-off-by:
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Eric W. Biederman authored
Currently we attempt to restore virtual wire mode on reboot, which only works if we can figure out where the i8259 is connected. This is very useful when we are kexec another kernel and likely helpful to an peculiar BIOS that make assumptions about how the system is setup. Since the acpi MADT table does not provide the location where the i8259 is connected we have to look at the hardware to figure it out. Most systems have the i8259 connected the local apic of the cpu so won't be affected but people running Opteron and some serverworks chipsets should be able to use kexec now. In addition this patch removes the hard coded assumption that the io_apic that delivers isa interrups is always known to the kernel as io_apic 0. There does not appear to be anything to guarantee that assumption is true. And From: Vivek Goyal <vgoyal@in.ibm.com> A minor fix to the patch which remembers the location of where i8259 is connected. Now counter i has been replaced by apic. counter i is having some junk value which was leading to non-detection of i8259 connected to IOAPIC. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
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Chuck Ebbert authored
Setting RF (resume flag) allows a debugger to resume execution after a code breakpoint without tripping the breakpoint again. It is reset by the CPU after executing one instruction. Signed-off-by:
Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by:
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Chuck Ebbert authored
The manual says Int 6 is "invalid opcode", not "invalid operand". Signed-off-by:
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Luiz Fernando Capitulino authored
Fixes the following sparse warnings: arch/x86_64/kernel/mce_amd.c:321:29: warning: Using plain integer as NULL pointer arch/x86_64/kernel/mce_amd.c:410:41: warning: Using plain integer as NULL pointer Signed-off-by:
Luiz Capitulino <lcapitulino@mandriva.com.br> Signed-off-by:
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Andi Kleen authored
It was set as an NMI, but the NMI bit always forces an interrupt to end up at vector 2. So it was never used. Remove. Signed-off-by:
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Jason Uhlenkott authored
It looks like the new scalable TLB flush code for x86_64 is claiming one more IRQ vector than it actually uses. Signed-off-by:
Jason Uhlenkott <jasonuhl@sgi.com> Signed-off-by:
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Andi Kleen authored
Signed-off-by:
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Andi Kleen authored
Fix CC arch/x86_64/kernel/nmi.o linux/arch/x86_64/kernel/nmi.c: In function ???check_nmi_watchdog???: linux/arch/x86_64/kernel/nmi.c:155: warning: statement with no effect on Uniprocessor builds. Signed-off-by:
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Ravikiran G Thirumalai authored
Patch uses a static PDA array early at boot and reallocates processor PDA with node local memory when kmalloc is ready, just before pda_init. The boot_cpu_pda is needed since the cpu_pda is used even before pda_init for that cpu is called (to set the static per-cpu areas offset table etc) Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Signed-off-by:
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Ravikiran G Thirumalai authored
Helper patch to change cpu_pda users to use macros to access cpu_pda instead of the cpu_pda[] array. Signed-off-by:
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Ravikiran Thirumalai authored
Patch enables early intialization of cpu_to_node. apicid_to_node is built by reading the SRAT table, from acpi_numa_init with ACPI_NUMA and k8_scan_nodes with K8_NUMA. x86_cpu_to_apicid is built by parsing the ACPI MADT table, from acpi_boot_init. We combine these two tables and setup cpu_to_node. Early intialization helps the static per_cpu_areas in getting pages from correct node. Change since last release: Do not initialize early init_cpu_to_node for faking node cases. Patch tested on TYAN dual core 4P board with K8 only, ACPI_NUMA. Tested on EM64T NUMA. Also tested with numa=off, numa=fake, and running a kernel compiled with NUMA on a regular EM64 2 way SMP. Signed-off-by:
Alok N Kataria <alokk@calsoftinc.com> Signed-off-by:
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Andi Kleen authored
No functional changes. And remove one redundant prototype. Signed-off-by:
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Andi Kleen authored
Replacing the old home brewn __force_inline. Signed-off-by:
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Andi Kleen authored
Passing random input values in eax to cpuid is not a good idea because the CPU will GPF for unknown ones. Use the correct x86-64 version that exists for a longer time too. This also adds a memory barrier to prevent the optimizer from reordering. Cc: tigran@veritas.com Signed-off-by:
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Andi Kleen authored
RDTSC serialization using cpuid is not needed for Intel platforms. This increases gettimeofday performance. Cc: vojtech@suse.cz Cc: rohit.seth@intel.com Signed-off-by:
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Andi Kleen authored
The real vsyscall .text addresses are not mapped when the alternative() replacement runs early, so use some black magic to access them using the direct mapping. Signed-off-by:
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Andi Kleen authored
Needed for follow on patches Signed-off-by:
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Andi Kleen authored
They already do this in hardware and the Linux algorithm actually adds errors. Cc: mingo@elte.hu Cc: rohit.seth@intel.com Signed-off-by:
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Andi Kleen authored
cpumask.h wasn't included implicitely into proto.h in this case. Just move it over to smp.h Signed-off-by:
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Vivek Goyal authored
o Apic id is in most significant 8 bits of APIC_ID register. Current code is trying to write apic id to least significant 8 bits. This patch fixes it. o This fix enables booting uni kdump capture kernel on a cpu with non-zero apic id. Signed-off-by:
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Brian Gerst authored
Remove exports that are already exported from the object's source file. Signed-off-by:
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Brian Gerst authored
These functions are inlines and shouldn't be exported. Signed-off-by:
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Andi Kleen authored
This function is never used for x86_64. Signed-off-by:
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Andi Kleen authored
They are referred to often so avoid potential false sharing for them. Signed-off-by:
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Andi Kleen authored
As suggested by Linus. This catches driver bugs that could cause corruption on IOMMU architectures. Also I converted the BUGs to out_of_line_bug()s to save a bit of text space. Signed-off-by:
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Andi Kleen authored
Just add the missing PCI ID. Cc: perex@suse.cz Cc: tiwai@suse.de Signed-off-by:
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Andi Kleen authored
Hopefully the users will take the hint. Signed-off-by:
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Andi Kleen authored
- Remove optimization for old B stepping Opteron - Make the fast path for copies with a multiple of eight length faster. - Minor instruction rearrangement to hopefully avoid a pipeline stall or two. - Add comment about errata to consider. Signed-off-by:
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