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* iommu/irq_remapping: Kill function irq_remapping_supported() and related codeJiang Liu2015-01-151-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | Simplify irq_remapping code by killing irq_remapping_supported() and related interfaces. Joerg posted a similar patch at https://lkml.org/lkml/2014/12/15/490, so assume an signed-off from Joerg. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Joerg Roedel <joro@8bytes.org> Cc: Tony Luck <tony.luck@intel.com> Cc: iommu@lists.linux-foundation.org Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: David Rientjes <rientjes@google.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Jan Beulich <JBeulich@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Oren Twaig <oren@scalemp.com> Link: http://lkml.kernel.org/r/1420615903-28253-14-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* iommu, x86: Restructure setup of the irq remapping featureThomas Gleixner2015-01-151-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | enable_IR_x2apic() calls setup_irq_remapping_ops() which by default installs the intel dmar remapping ops and then calls the amd iommu irq remapping prepare callback to figure out whether we are running on an AMD machine with irq remapping hardware. Right after that it calls irq_remapping_prepare() which pointlessly checks: if (!remap_ops || !remap_ops->prepare) return -ENODEV; and then calls remap_ops->prepare() which is silly in the AMD case as it got called from setup_irq_remapping_ops() already a few microseconds ago. Simplify this and just collapse everything into irq_remapping_prepare(). The irq_remapping_prepare() remains still silly as it assigns blindly the intel ops, but that's not scope of this patch. The scope here is to move the preperatory work, i.e. memory allocations out of the atomic section which is required to enable irq remapping. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Borislav Petkov <bp@alien8.de> Acked-and-tested-by: Joerg Roedel <joro@8bytes.org> Cc: Tony Luck <tony.luck@intel.com> Cc: iommu@lists.linux-foundation.org Cc: Joerg Roedel <jroedel@suse.de> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Jan Beulich <JBeulich@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Oren Twaig <oren@scalemp.com> Cc: x86@kernel.org Link: http://lkml.kernel.org/r/20141205084147.232633738@linutronix.de Link: http://lkml.kernel.org/r/1420615903-28253-2-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* iommu: dmar: Provide arch specific irq allocationThomas Gleixner2014-05-161-0/+3
| | | | | | | | | | | | | | | | | | | | ia64 and x86 share this driver. x86 is moving to a different irq allocation and ia64 keeps its private irq_create/destroy stuff. Use macros to redirect to one or the other. Yes, macros to avoid include hell. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Grant Likely <grant.likely@linaro.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Acked-by: Joerg Roedel <joro@8bytes.org> Cc: x86@kernel.org Cc: linux-ia64@vger.kernel.org Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20140507154336.372289825@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* iommu: Fix compile warnings with forward declarationsJoerg Roedel2013-04-191-0/+7
| | | | | | | | The irq_remapping.h file for x86 does not include all necessary forward declarations for the data structures used. This causes compile warnings, so fix it. Signed-off-by: Joerg Roedel <joro@8bytes.org>
* iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsetsNeil Horman2013-04-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A few years back intel published a spec update: http://www.intel.com/content/dam/doc/specification-update/5520-and-5500-chipset-ioh-specification-update.pdf For the 5520 and 5500 chipsets which contained an errata (specificially errata 53), which noted that these chipsets can't properly do interrupt remapping, and as a result the recommend that interrupt remapping be disabled in bios. While many vendors have a bios update to do exactly that, not all do, and of course not all users update their bios to a level that corrects the problem. As a result, occasionally interrupts can arrive at a cpu even after affinity for that interrupt has be moved, leading to lost or spurrious interrupts (usually characterized by the message: kernel: do_IRQ: 7.71 No irq handler for vector (irq -1) There have been several incidents recently of people seeing this error, and investigation has shown that they have system for which their BIOS level is such that this feature was not properly turned off. As such, it would be good to give them a reminder that their systems are vulnurable to this problem. For details of those that reported the problem, please see: https://bugzilla.redhat.com/show_bug.cgi?id=887006 [ Joerg: Removed CONFIG_IRQ_REMAP ifdef from early-quirks.c ] Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Prarit Bhargava <prarit@redhat.com> CC: Don Zickus <dzickus@redhat.com> CC: Don Dutile <ddutile@redhat.com> CC: Bjorn Helgaas <bhelgaas@google.com> CC: Asit Mallick <asit.k.mallick@intel.com> CC: David Woodhouse <dwmw2@infradead.org> CC: linux-pci@vger.kernel.org CC: Joerg Roedel <joro@8bytes.org> CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> CC: Arkadiusz Miśkiewicz <arekm@maven.pl> Signed-off-by: Joerg Roedel <joro@8bytes.org>
* x86, irq: Move irq_remapped out of x86 core codeJoerg Roedel2013-01-281-10/+0
| | | | | | | | | The irq_remapped function is only used in IOMMU code after the last patch. So move its definition there too. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* x86, irq: Introduce setup_remapped_irq()Joerg Roedel2013-01-281-0/+9
| | | | | | | | | This function does irq-remapping specific interrupt setup like modifying the chip defaults. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* x86, io-apic: Move CONFIG_IRQ_REMAP code out of x86 coreJoerg Roedel2013-01-281-0/+17
| | | | | | | | | Move all the code to either to the header file asm/irq_remapping.h or to drivers/iommu/. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* x86, irq: Move irq_remapping_enabled declaration to iommu codeJoerg Roedel2013-01-281-4/+0
| | | | | | | | Remove the last left-over from this flag from x86 code. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* x86, io_apic: Move irq_remapping_enabled checks out of check_timer()Joerg Roedel2013-01-281-0/+5
| | | | | | | | | Move these checks to IRQ remapping code by introducing the panic_on_irq_remap() function. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* x86, io_apic: Introduce set_affinity function pointerJoerg Roedel2013-01-281-9/+0
| | | | | | | | | | With interrupt remapping a special function is used to change the affinity of an IO-APIC interrupt. Abstract this with a function pointer. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* x86, msi: Use IRQ remapping specific setup_msi_irqs routineJoerg Roedel2013-01-281-12/+0
| | | | | | | | | Use seperate routines to setup MSI IRQs for both irq_remapping_enabled cases. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* irq_remap: Fix compiler warning with CONFIG_IRQ_REMAP=ySuresh Siddha2012-05-081-4/+2
| | | | | | | | | | | | | Fix the below compiler warning: arch/x86/include/asm/irq_remapping.h:72:19: warning: ‘struct IO_APIC_route_entry’ declared inside parameter list [enabled by default] Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: joro@8bytes.org Cc: iommu@lists.linux-foundation.org Cc: Joerg Roedel <joerg.roedel@amd.com> Link: http://lkml.kernel.org/r/1336460934-23592-1-git-send-email-suresh.b.siddha@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* iommu: rename intr_remapping.[ch] to irq_remapping.[ch]Suresh Siddha2012-05-071-0/+103
| | | | | | | | | | | Make the file names consistent with the naming conventions of irq subsystem. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* x86, iommu/vt-d: Clean up interfaces for interrupt remappingJoerg Roedel2012-05-071-22/+0
| | | | | | | | | | | | Remove the Intel specific interfaces from dmar.h and remove asm/irq_remapping.h which is only used for io_apic.c anyway. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* iommu/vt-d: Convert MSI remapping setup to remap_opsJoerg Roedel2012-05-071-23/+0
| | | | | | | | | | | | This patch introduces remapping-ops for setting ups MSI interrupts. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* iommu: Rename the DMAR and INTR_REMAP config optionsSuresh Siddha2011-09-211-1/+1
| | | | | | | | | | | | | | | | | | | | Change the CONFIG_DMAR to CONFIG_INTEL_IOMMU to be consistent with the other IOMMU options. Rename the CONFIG_INTR_REMAP to CONFIG_IRQ_REMAP to match the irq subsystem name. And define the CONFIG_DMAR_TABLE for the common ACPI DMAR routines shared by both CONFIG_INTEL_IOMMU and CONFIG_IRQ_REMAP. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: yinghai@kernel.org Cc: youquan.song@intel.com Cc: joerg.roedel@amd.com Cc: tony.luck@intel.com Cc: dwmw2@infradead.org Link: http://lkml.kernel.org/r/20110824001456.558630224@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, ioapic: Define irq_remap_modify_chip_defaults()Suresh Siddha2011-09-211-0/+4
| | | | | | | | | | | | | | Define irq_remap_modify_chip_defaults() and remove the duplicate code, cleanup the unnecessary ifdefs. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: yinghai@kernel.org Cc: youquan.song@intel.com Cc: joerg.roedel@amd.com Cc: tony.luck@intel.com Cc: dwmw2@infradead.org Link: http://lkml.kernel.org/r/20110824001456.499225692@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: Speed up the irq_remapped check in hot pathesThomas Gleixner2010-10-121-0/+8
| | | | | | | | | | | | irq_2_iommu is in struct irq_cfg, so we can do the irq_remapped check based on irq_cfg instead of going through a lookup function. That's especially interesting in the eoi_ioapic_irq() hotpath. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
* x86, intr-remap: Remove IRTE setup duplicate codeSuresh Siddha2010-09-151-0/+27
| | | | | | | | Remove IRTE setup duplicate code with prepare_irte(). Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <20100827181049.095067319@sbsiddha-MOBL3.sc.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86: x2apic, IR: Clean up X86_X2APIC and INTR_REMAP config checksSuresh Siddha2009-04-211-1/+1
| | | | | | | | | | | | | | | Add x2apic_supported() to clean up CONFIG_X86_X2APIC checks. Fix CONFIG_INTR_REMAP checks. [ Impact: cleanup ] Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: dwmw2@infradead.org Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Weidong Han <weidong.han@intel.com> LKML-Reference: <20090420200450.128993000@linux-os.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, x2apic: fix clear_local_APIC() in the presence of x2apicSuresh Siddha2009-03-171-2/+0
| | | | | | | | | | Impact: cleanup, paranoia We were not clearing the local APIC in clear_local_APIC() in the presence of x2apic. Fix it. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86: canonicalize remaining header guardsH. Peter Anvin2008-10-231-3/+3
| | | | | | | Canonicalize a few remaining header guards, with the exception for those which are still in subarchitecture directories. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86, um: ... and asm-x86 moveAl Viro2008-10-221-0/+8
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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