summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/crash.c
Commit message (Collapse)AuthorAgeFilesLines
* x86, UV: Make kdump avoid stack dumpsCliff Wickman2010-07-211-0/+3
| | | | | | | | | | | | | | | | | | | | | | | UV NMI callback's should not write stack dumps when a kdump is to be written. When invoking the crash kernel to write a dump, kdump_nmi_shootdown_cpus() uses NMI's to get all the cpu's to save their register context and halt. But the NMI interrupt handler runs a callback list. This patch sets a flag to prevent any of those callbacks from interfering with the halt of the cpu. For UV, which currently has the only callback to which this is relevant, the uv_handle_nmi() callback should not do dumping of stacks. The 'in_crash_kexec' flag is defined as an extern in kdebug.h firstly because x2apic_uv_x.c includes it. Secondly because some future callback might need the flag to know that it should not enter the debugger. (Such a scenario was in fact present in the 2.6.32 kernel, SuSE distribution, where a call to kdb needed to be avoided.) Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1ObLvt-0005UZ-Va@eag09.americas.sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* Revert "x86: disable IOMMUs on kernel crash"Chris Wright2010-04-071-6/+0
| | | | | | | | | | | | | | | | This effectively reverts commit 61d047be99757fd9b0af900d7abce9a13a337488. Disabling the IOMMU can potetially allow DMA transactions to complete without being translated. Leave it enabled, and allow crash kernel to do the IOMMU reinitialization properly. Cc: stable@kernel.org Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* x86: Use x86_platform for iommu_shutdownFUJITA Tomonori2009-11-081-3/+2
| | | | | | | | | | | | | | | | | | | This patch cleans up pci_iommu_shutdown() a bit to use x86_platform (similar to how IA64 initializes an IOMMU driver). This adds iommu_shutdown() to x86_platform to avoid calling every IOMMUs' shutdown functions in pci_iommu_shutdown() in order. The IOMMU shutdown functions are platform specific (we don't have multiple different IOMMU hardware) so the current way is pointless. An IOMMU driver sets x86_platform.iommu_shutdown to the shutdown function if necessary. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: joerg.roedel@amd.com LKML-Reference: <20091027163358F.fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: disable IOMMUs on kernel crashJoerg Roedel2009-06-151-0/+6
| | | | | | | | If the IOMMUs are still enabled when the kexec kernel boots access to the disk is not possible. This is bad for tools like kdump or anything else which wants to use PCI devices. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* x86, apic: remove duplicate asm/apic.h inclusionsIngo Molnar2009-02-171-2/+0
| | | | | | Impact: cleanup Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, apic: remove genapic.hIngo Molnar2009-02-171-1/+1
| | | | | | | | Impact: cleanup Remove genapic.h and remove all references to it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, smp: remove mach_ipi.hIngo Molnar2009-01-291-1/+1
| | | | | | Move mach_ipi.h definitions into genapic.h. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: smp.h move safe_smp_processor_id declartion to cpu.hJaswinder Singh Rajput2009-01-071-1/+1
| | | | | | | Impact: cleanup Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* kdump: forcibly disable VMX and SVM on machine_crash_shutdown()Eduardo Habkost2008-12-311-0/+18
| | | | | | | | | | | | | We need to disable virtualization extensions on all CPUs before booting the kdump kernel, otherwise the kdump kernel booting will fail, and rebooting after the kdump kernel did its task may also fail. We do it using cpu_emergency_vmxoff() and cpu_emergency_svm_disable(), that should always work, because those functions check if the CPUs support SVM or VMX before doing their tasks. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* x86: move nmi_shootdown_cpus() to reboot.cEduardo Habkost2008-11-121-76/+0
| | | | | | | | | | Impact: make nmi_shootdown_cpus() available to the rest of the x86 platform Now nmi_shootdown_cpus() is ready to be used by non-kdump code also. Move it to reboot.c. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 kdump: make nmi_shootdown_cpus() non-staticEduardo Habkost2008-11-121-2/+1
| | | | | | | | | Impact: make API available to the rest of x86 platform code Add prototype to asm/reboot.h. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 kdump: make kdump_nmi_callback() a function ptr on crash_nmi_callback()Eduardo Habkost2008-11-121-3/+8
| | | | | | | | | | Impact: extend nmi_shootdown_cpus() with a callback The reboot code will use a different function on crash_nmi_callback(). Adding a function pointer parameter to nmi_shootdown_cpus() for that. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 kdump: create kdump_nmi_shootdown_cpus()Eduardo Habkost2008-11-121-2/+9
| | | | | | | | | Impact: cleanup For the kdump-specific code that was living on nmi_shootdown_cpus(). Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 kdump: move crashing_cpu assignment to nmi_shootdown_cpus()Eduardo Habkost2008-11-121-3/+5
| | | | | | | | | Impact: cleanup This variable will be moved to non-kdump-specific code. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86 kdump: extract kdump-specific code from crash_nmi_callback()Eduardo Habkost2008-11-121-11/+20
| | | | | | | | | | Impact: cleanup The NMI CPU-halting code will be used on non-kdump cases, also (e.g. emergency_reboot when virtualization is enabled). Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: allow machine_crash_shutdown to be replacedGlauber Costa2008-04-271-1/+2
| | | | | | | | | This patch a llows machine_crash_shutdown to be replaced, just like any of the other functions in machine_ops Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* x86: move ipi definitions to mach_ipi.hGlauber Costa2008-04-171-4/+0
| | | | | | | take them out of the x86_64-only asm/mach_apic.h Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: disable hpet legacy replacement for kdumpOGAWA Hirofumi2007-12-031-0/+4
| | | | | | | | we should also add hpet_disable() for kdump. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: fix CONFIG_KEXEC build breakageMike Galbraith2007-10-241-3/+3
| | | | | | | | X86_32 build fix to commit 62a31a03b3d2a9d20e7a073e2cd9b27bfb7d6a3f Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: unify crash_32/64.cHiroshi Shimamoto2007-10-231-0/+144
Most of contents in crash are same. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 01:11:23 +0000