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2011-02-23x86: dtb: Add support for PCI devices backed by dtb nodesSebastian Andrzej Siewior
x86_of_pci_init() does two things: - it provides a generic irq enable and disable function. enable queries the device tree for the interrupt information, calls ->xlate on the irq host and updates the pci->irq information for the device. - it walks through PCI bus(es) in the device tree and adds its children (device) nodes to appropriate pci_dev nodes in kernel. So the dtb node information is available at probe time of the PCI device. Adding a PCI bus based on the information in the device tree is currently not supported. Right now direct access via ioports is used. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by: Dirk Brandewie <dirk.brandewie@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org LKML-Reference: <1298405266-1624-8-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: dtb: Add device tree support for HPETSebastian Andrzej Siewior
Set hpet_address based on information provied form DTB Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org Cc: Dirk Brandewie <dirk.brandewie@gmail.com> LKML-Reference: <1298405266-1624-7-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: dtb: Add early parsing of IO_APICSebastian Andrzej Siewior
APIC and IO_APIC have to be added to the system early because native_init_IRQ() requires it. In order to obtain the address of the ioapic the device tree has to be unflattened so of_address_to_resource() works. The device tree is relocated to ensure it is always covered by the kernel mapping. That way the boot loader does not have to make any assumptions about kernel's memory layout. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org Cc: Dirk Brandewie <dirk.brandewie@gmail.com> LKML-Reference: <1298405266-1624-6-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: dtb: Add irq domain abstractionSebastian Andrzej Siewior
The here introduced irq_domain abstraction represents a generic irq controller. It is a subset of powerpc's irq_host which is going to be renamed to irq_domain and then become generic. This implementation will be removed once it is generic. The xlate callback is resposible to parse irq informations like irq type and number and returns the hardware irq number which is reported by the hardware as active. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by: Dirk Brandewie <dirk.brandewie@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org LKML-Reference: <1298405266-1624-5-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: dtb: Add a device tree for CE4100Sebastian Andrzej Siewior
History: v1..v2: - dropped device_type except for cpu & pci. I have the compatible string for pci so I can drop the device_type once it is possible - I lowercased all compatible types. I will need to resend some patches which have upper case intel - The cpu had the same compatible string as the soc node. So I added to the soc node -immr for internel memory mapped registers. - I added generic names for all parts. - I reworked the i2c bars matching the way you suggested. I added a compatible node for the PCI device which only the PCI ids in its compatible string. The bars (each represents a complete i2c controller) have a "intel,ce4100-i2c-controller" compatible node. It is not used by the driver. The driver is probed via PCI ids (by the pci subsystem not OF) and matches the bar address against the ressource in the child node. Once there is a hit the node is attached. - The SPI driver is also probed via pci. However I also attached a compatible property based on PCI ids v2..v3: - intel,ce4100-immr become intel,ce4100-cp. cp stands for core peripherals. The Atom data sheet talks here about ACPI devices. Since we don't have ACPI this does not apply here. - The interrupt map is gone. There are now plenty of device nodes. - The "unit address string" got fixed, it uses not DD,V format. v3..v4: - added descriptions for compatible nodes introduced here: - intel,ce4100-ioapic - intel,ce4100-lapic - intel,ce4100-hpet - intel,ce4100 - intel,ce4100-cp - intel,ce4100-pci - added a description about I2C controller magic. - Added gpio-controller and gpio-cells property to gpio devices. Those properties are not (yet) used. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org LKML-Reference: <1298405266-1624-4-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: Add device tree supportSebastian Andrzej Siewior
This patch adds minimal support for device tree on x86. The device tree blob is passed to the kernel via setup_data which requires at least boot protocol 2.09. Memory size, restricted memory regions, boot arguments are gathered the traditional way so things like cmd_line are just here to let the code compile. The current plan is use the device tree as an extension and to gather information which can not be enumerated and would have to be hardcoded otherwise. This includes things like - which devices are on this I2C/SPI bus? - how are the interrupts wired to IO APIC? - where could my hpet be? Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org LKML-Reference: <1298405266-1624-3-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: e820: Remove conditional early mapping in parse_e820_extSebastian Andrzej Siewior
This patch ensures that the memory passed from parse_setup_data() is large enough to cover the complete data structure. That means that the conditional mapping in parse_e820_ext() can go. While here, I also attempt not to map two pages if the address is not aligned to a page boundary. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org LKML-Reference: <1298405266-1624-2-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23Merge branch 'x86/apic' into x86/platformThomas Gleixner
Reason: Devicetree based ioapic setup depends on the apic changes. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Move trigger defines to io_apic.hThomas Gleixner
Required for devicetree based io_apic configuration. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Implement and use io_apic_setup_irq_pin_once()Thomas Gleixner
io_apic_set_pci_routing() and mp_save_irq() check the pin_programmed bit before calling io_apic_setup_irq_pin() and set the bit when the pin was setup. Move that duplicated code into a separate function and use it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Remove useless inlinesThomas Gleixner
There is no point to have irq_trigger() and irq_polarity() as wrappers around the MPBIOS_* camel case functions. Get rid of both the inlines and the ugly camel case. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Make a few functions staticThomas Gleixner
No users outside of io_apic.c. Mark bad_ioapic() __init while at it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Use setup function in setup_IO_APIC_irq_extra()Thomas Gleixner
Another version of the same thing. Only set the pin programmed, when the setup function succeeds. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Use setup function in __io_apic_setup_irqs()Thomas Gleixner
Replace the duplicated code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Use setup function in __io_apic_set_pci_routing()Thomas Gleixner
The only difference here is that we did not call __add_pin_to_irq_node() for the legacy irqs, but that's not worth 30 lines of extra code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Use new setup function in pre_init_apic_IRQ0()Thomas Gleixner
Remove the duplicated code and call the function. It does not matter whether we allocated the cfg before calling setup_local_APIC() and we can set the irq chip and handler after that as well. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Add io_apic_setup_irq_pin()Thomas Gleixner
There are about four places in the ioapic code which do exactly the same setup sequence. Also the OF based ioapic setup needs that function to avoid putting the OF specific code into ioapic.c Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Split out the nested loop in setup_IO_APIC_irqs()Thomas Gleixner
Two consecutive for(...) for(...) lines to avoid an extra indentation are just horrible to read. I had to look more than once to figure out what the code is doing. Split out the inner loop into a separate function. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: ioapic: Remove silly debug bloat in setup_IOAPIC_irqs()Thomas Gleixner
This is debug code and it does not matter at all whether we print each not connected pin in an extra line or try to be extra clever. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: OLPC: Make OLPC=n build againThomas Gleixner
Stupid me missed the functions called from setup.c. Add the stubs back for OLPC=n Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23x86: Fix deps of X86_UP_IOAPICHenrik Kretzschmar
Since commit 7cd92366a593246650cc7d6198e2c7d3af8c1d8a lAPIC enabled accidently the IOAPIC, which now gets fixed. Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> LKML-Reference: <1298385487-4708-5-git-send-email-henne@nachtwindheim.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23x86: Add dummy functions for compiling without IOAPICHenrik Kretzschmar
This patch adds IOAPIC dummy functions for compilation with local APIC, but without IOAPIC. The local variable ioapic_entries in enable_IR_x2apic() does not need initialization anymore, since the dummy returns NULL. Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> LKML-Reference: <1298385487-4708-4-git-send-email-henne@nachtwindheim.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23x86: Rework arch_disable_smp_support() for x86Henrik Kretzschmar
Currently arch_disable_smp_support() on x86 disables only the support for the IOAPIC and is also compiled in if SMP-support is not. Therefore this function is renamed to disable_ioapic_support(), which meets its purpose and is only compiled in the kernel when IOAPIC support is also. A new arch_disable_smp_support() is created in smpboot.c, which calls disable_ioapic_support() and gets only compiled in the kernel when SMP support is also. Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> LKML-Reference: <1298385487-4708-3-git-send-email-henne@nachtwindheim.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23x86: Add dummy mp_save_irq()Henrik Kretzschmar
This is a dummy function, used when no IOAPIC is compiled in. Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> LKML-Reference: <1298385487-4708-2-git-send-email-henne@nachtwindheim.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23x86: Move ioapic_irq_destination_types to apicdef.hHenrik Kretzschmar
This enum is used by non IOAPIC code, so apicdef.h is the best place for it. Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> LKML-Reference: <1298385487-4708-1-git-send-email-henne@nachtwindheim.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirectionThomas Gleixner
OLPC_OPENFIRMWARE_DT is just there to be selected by OLPC and selects OF_PROMTREE. So let OLPC select OF_PROMTREE and remove that extra config indirection. Fixup code and Makefile and use CONFIG_OF_PROMTREE instead. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
2011-02-23x86: OLPC: Cleanup config maze completelyThomas Gleixner
Neither CONFIG_OLPC_OPENFIRMWARE nor CONFIG_OLPC_OPENFIRMWARE_DT are really necessary. OLPC selects OLPC_OPENFIRMWARE unconditionally, so move the "select OF" part under OLPC config option and fixup the dependencies in Makefiles and code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
2011-02-23x86: OLPC: Hide OLPC_OPENFIRMWARE config switchThomas Gleixner
OLPC selects OLPC_OPENFIRMWARE unconditionally. If OLPC=n then the OLPC_OPENFIRMWARE functionality is pointless. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
2011-02-23x86: OLPC: Remove redundant !X64_64 config dependencyThomas Gleixner
OLPC is under if X86_32 already. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
2011-02-23Merge branch 'linus' into x86/platformThomas Gleixner
Reason: Import mainline device tree changes on which further patches depend on or conflict. Trivial conflict in: drivers/spi/pxa2xx_spi_pci.c Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-22xen/setup: Inhibit resource API from using System RAM E820 gaps as PCI mem gaps.Zhang, Fengzhe
With the hypervisor argument of dom0_mem=X we iterate over the physical (only for the initial domain) E820 and subtract the the size from each E820_RAM region the delta so that the cumulative size of all E820_RAM regions is equal to 'X'. This sometimes ends up with E820_RAM regions with zero size (which are removed by e820_sanitize) and E820_RAM that are smaller than physically. Later on the PCI API looks at the E820 and attempts to set up an resource region for the "PCI mem". The E820 (assume dom0_mem=1GB is set) compared to the physical looks as so: [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] Xen: 0000000000000000 - 0000000000097c00 (usable) [ 0.000000] Xen: 0000000000097c00 - 0000000000100000 (reserved) -[ 0.000000] Xen: 0000000000100000 - 00000000defafe00 (usable) +[ 0.000000] Xen: 0000000000100000 - 0000000040000000 (usable) [ 0.000000] Xen: 00000000defafe00 - 00000000defb1ea0 (ACPI NVS) [ 0.000000] Xen: 00000000defb1ea0 - 00000000e0000000 (reserved) [ 0.000000] Xen: 00000000f4000000 - 00000000f8000000 (reserved) .. And we get [ 0.000000] Allocating PCI resources starting at 40000000 (gap: 40000000:9efafe00) while it should have started at e0000000 (a nice big gap up to f4000000 exists). The "Allocating PCI" is part of the resource API. The users that end up using those PCI I/O regions usually supply their own BARs when calling the resource API (request_resource, or allocate_resource), but there are exceptions which provide an empty 'struct resource' and expect the API to provide the 'struct resource' to be populated with valid values. The one that triggered this bug was the intel AGP driver that requested a region for the flush page (intel_i9xx_setup_flush). Before this patch, when running under Xen hypervisor, the 'struct resource' returned could have (depending on the dom0_mem size) physical ranges of a 'System RAM' instead of 'I/O' regions. This ended up with the Hypervisor failing a request to populate PTE's with those PFNs as the domain did not have access to those 'System RAM' regions (rightly so). After this patch, the left-over E820_RAM region from the truncation, will be labeled as E820_UNUSABLE. The E820 will look as so: [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] Xen: 0000000000000000 - 0000000000097c00 (usable) [ 0.000000] Xen: 0000000000097c00 - 0000000000100000 (reserved) -[ 0.000000] Xen: 0000000000100000 - 00000000defafe00 (usable) +[ 0.000000] Xen: 0000000000100000 - 0000000040000000 (usable) +[ 0.000000] Xen: 0000000040000000 - 00000000defafe00 (unusable) [ 0.000000] Xen: 00000000defafe00 - 00000000defb1ea0 (ACPI NVS) [ 0.000000] Xen: 00000000defb1ea0 - 00000000e0000000 (reserved) [ 0.000000] Xen: 00000000f4000000 - 00000000f8000000 (reserved) For more information: http://mid.gmane.org/1A42CE6F5F474C41B63392A5F80372B2335E978C@shsmsx501.ccr.corp.intel.com BugLink: http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1726 Signed-off-by: Fengzhe Zhang <fengzhe.zhang@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-22Merge branch 'devicetree/for-x86' of git://git.secretlab.ca/git/linux-2.6 ↵Thomas Gleixner
into x86/platform Reason: x86 devicetree support for ce4100 depends on those device tree changes scheduled for .39. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-22KVM: SVM: Advance instruction pointer in dr_interceptJoerg Roedel
In the dr_intercept function a new cpu-feature called decode-assists is implemented and used when available. This code-path does not advance the guest-rip causing the guest to dead-loop over mov-dr instructions. This is fixed by this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-02-22x86-64, NUMA: Seperate out numa_alloc_distance() from numa_set_distance()Yinghai Lu
Alloc code is much bigger the distance setting. Separate it out into numa_alloc_distance() for readability. -v2: Let alloc_numa_distance to return -ENOMEM on failing path, requested by tj. -tj: Description update. Minor tweaks including function name, location and return value check. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-22x86-64, NUMA: Add proper function comments to global functionsTejun Heo
Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com>
2011-02-22x86-64, NUMA: Move NUMA emulation into numa_emulation.cTejun Heo
Create numa_emulation.c and move all NUMA emulation code there. The definitions of struct numa_memblk and numa_meminfo are moved to numa_64.h. Also, numa_remove_memblk_from(), numa_cleanup_meminfo(), numa_reset_distance() along with numa_emulation() are made global. - v2: Internal declarations moved to numa_internal.h as suggested by Yinghai. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com>
2011-02-22x86-64, NUMA: Prepare numa_emulation() for moving NUMA emulation into a ↵Tejun Heo
separate file Update numa_emulation() such that, it - takes @numa_meminfo and @numa_dist_cnt instead of directly referencing the global variables. - copies the distance table by iterating each distance with node_distance() instead of memcpy'ing the distance table. - tests emu_cmdline to determine whether emulation is requested and fills emu_nid_to_phys[] with identity mapping if emulation is not used. This allows the caller to call numa_emulation() unconditionally and makes return value unncessary. - defines dummy version if CONFIG_NUMA_EMU is disabled. This patch doesn't introduce any behavior change. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com>
2011-02-21x86-64, NUMA: Do not scan two times for setup_node_bootmem()Yinghai Lu
By the time setup_node_bootmem() is called, all the memblocks are already registered. As node_data is allocated from these memblocks, calling it more than once doesn't make any difference. Drop the loop. tj: Dropped comment referencing to the old behavior as suggested by David and rephrased the description. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-21x86: Fix reboot problem on VersaLogic Menlow boardsKushal Koolwal
VersaLogic Menlow based boards hang on reboot unless reboot=bios is used. Add quirk to reboot through the BIOS. Tested on at least four boards. Signed-off-by: Kushal Koolwal <kushalkoolwal@gmail.com> LKML-Reference: <1298152563-21594-1-git-send-email-kushalkoolwal@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-20x86, microcode, AMD: Fix signedness bug in generic_load_microcode()Dan Carpenter
install_equiv_cpu_table() returns type int. It uses negative error codes so using an unsigned type breaks the error handling. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Borislav Petkov <borislav.petkov@amd.com> Cc: open list:AMD MICROCODE UPD... <amd64-microcode@amd64.org> Cc: Andreas Herrmann <andreas.herrmann3@amd.com> LKML-Reference: <20110218091716.GA4384@bicker> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-20x86, system.h: Drop unused __SAVE/__RESTORE macrosBorislav Petkov
Those are unused since at least the beginning of git history. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <1298044056-31104-1-git-send-email-bp@amd64.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-18x86-64, trampoline: Remove unused variableH. Peter Anvin
Removed unused variable left over from development. Reported-by: Brian Gerst <brgerst@gmail.com> LKML-Reference: <AANLkTik6UJ680mWJcu_W+jerLcqPjwjvaXyxB1jAMaG0@mail.gmail.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Matthieu Castet <castet.matthieu@free.fr>
2011-02-18x86, reboot: Fix the use of passed arguments in 32-bit BIOS rebootH. Peter Anvin
The initial version of this patch had %eax being a segment and %ecx being the mode. I had changed the interfaces, but not the actual implementation! Reported-by: Brian Gerst <brgerst@gmail.com> LKML-Reference: <AANLkTikxqk=HEw9R-Du=v-1ti1HDGAY9vaNUep2XARaz@mail.gmail.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Matthieu Castet <castet.matthieu@free.fr>
2011-02-18x86: mrst: Remove apb timer read workaroundjacob.jun.pan@linux.intel.com
APB timer current count was unreliable in the earlier silicon, which could result in time going backwards. This problem has been fixed in the current silicon stepping. This patch removes the workaround which was used to check and prevent timer rolling back when APB timer is used as clocksource device. The workaround code was also flawed by potential race condition around the cached read value last_read. Though a fix can be done by assigning last_read to a local variable at the beginning of apbt_read_clocksource(), but this is not necessary anymore. [ tglx: A sane timer on an Intel chip - I can't believe it ] Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Alan Cox <alan@linux.intel.com> LKML-Reference: <1298065374-25532-1-git-send-email-jacob.jun.pan@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-18pci/xen: When free-ing MSI-X/MSI irq->desc also use generic code.Konrad Rzeszutek Wilk
This code path is only run when an MSI/MSI-X PCI device is passed in to PV DomU. In 2.6.37 time-frame we over-wrote the default cleanup handler for MSI/MSI-X irq->desc to be "xen_teardown_msi_irqs". That function calls the the xen-pcifront driver which can tell the backend to cleanup/take back the MSI/MSI-X device. However, we forgot to continue the process of free-ing the MSI/MSI-X device resources (irq->desc) in the PV domU side. Which is what the default cleanup handler: default_teardown_msi_irqs did. Hence we would leak IRQ descriptors. Without this patch, doing "rmmod igbvf;modprobe igbvf" multiple times ends with abandoned IRQ descriptors: 28: 5 xen-pirq-pcifront-msi-x 29: 8 xen-pirq-pcifront-msi-x ... 130: 10 xen-pirq-pcifront-msi-x with the end result of running out of IRQ descriptors. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-18pci/xen: Cleanup: convert int** to int[]Konrad Rzeszutek Wilk
Cleanup code. Cosmetic change to make the code look easier to read. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-18x86/pci: Remove unused variableSebastian Andrzej Siewior
|arch/x86/pci/ce4100.c: In function `ce4100_conf_read': |arch/x86/pci/ce4100.c:257:9: warning: unused variable `retval' Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: dirk.brandewie@gmail.com LKML-Reference: <1292600033-12271-16-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-18pci/xen: Use xen_allocate_pirq_msi instead of xen_allocate_pirqKonrad Rzeszutek Wilk
xen_allocate_pirq -> xen_map_pirq_gsi -> PHYSDEVOP_alloc_irq_vector IFF xen_initial_domain() in addition to the kernel side book-keeping side of things (set chip and handler, update irq_info etc) whereas xen_allocate_pirq_msi just does the kernel book keeping. Also xen_allocate_pirq allocates an IRQ in the 1-1 GSI space whereas xen_allocate_pirq_msi allocates a dynamic one in the >GSI IRQ space. All of this is uneccessary as this code path is only executed when we run as a domU PV guest with an MSI/MSI-X PCI card passed in. Hence we can jump straight to allocating an dynamic IRQ (and binding it to the proper PIRQ) and skip the rest. In short: this change is a cosmetic one. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-18x86: Eliminate pointless adjustment attempts in fixup_irqs()Jan Beulich
Not only when an IRQ's affinity equals cpu_online_mask is there no need to actually try to adjust the affinity, but also when it's a subset thereof. This particularly avoids adjustment attempts during system shutdown to any IRQs bound to CPU#0. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Gary Hade <garyhade@us.ibm.com> LKML-Reference: <4D5D52C2020000780003272C@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-18x86: Remove die_nmi()Jan Beulich
With no caller left, the function and the DIE_NMIWATCHDOG enumerator can both go away. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Don Zickus <dzickus@redhat.com> LKML-Reference: <4D5D521C0200007800032702@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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