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* ARM: ux500: Enable PL011 AMBA UART Controller for Device TreeLee Jones2012-03-16
| | | | | | | | | Enables the 3 UARTs found on a u8500 using DT. Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* ARM: ux500: Enable Cortex-A9 GIC (Generic Interrupt Controller) in Device TreeLee Jones2012-03-16
| | | | | | | | | This enables the embedded GIC on all u8500 based hardware using DT. Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* ARM: ux500: db8500: list most devices in the snowball device treeLee Jones2012-03-16
| | | | | | | | | | | | | | | | | | This adds all devices that are normally present through the u8500_init_machine function in the device tree as well, which will duplicate the devices that are visible. This will not do much by itself because the device from the device tree are not matched by any device driver until they are converted as well. The next step is to move over one device at a time to actually be used from the device tree instead of the hardcoded device using auxdata to pass the correct platform_data. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* ARM: ux500: split dts file for snowball into generic partArnd Bergmann2012-03-16
| | | | | | | | | | db8500.dtsi can be used by all systems with a db8500 or db9500 SoC, while snowball.dts is board specific. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* ARM: ux500: combine the board init functions for DT bootArnd Bergmann2012-03-16
| | | | | | | | | This lets us move over evertything to device tree one by one. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* ARM: ux500: Initial Device Tree support for SnowballArnd Bergmann2012-03-16
| | | | | | | | | | | | | | | This provides very basic Device Tree support for ST-Ericsson's low-cost development platform, Snowball. If Device Tree for ux500 is enabled and the correct board is configured within the Device Tree blob, the correct *_init_machine() will be called. This patch is based on some original work completed by: Niklas Hernaeus <niklas.hernaeus@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Niklas Hernaeus <niklas.hernaeus@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* ARM: ux500: CONFIG: Enable Device Tree support for future endeavoursLee Jones2012-03-16
| | | | | | Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* Merge branch 'depends/driver-core' into ux500/dtArnd Bergmann2012-03-16
|\ | | | | | | | | Conflicts: drivers/base/cpu.c
| * Documentation: add information for new sysfs soc bus functionalityLee Jones2012-02-10
| | | | | | | | | | | | | | | | | | This change applies the required documentation for each new attribute recenty added by the new System-On-Chip (SoC) information export bus driver. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * drivers/base: add bus for System-on-Chip devicesLee Jones2012-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Traditionally, any System-on-Chip based platform creates a flat list of platform_devices directly under /sys/devices/platform. In order to give these some better structure, this introduces a new bus type for soc_devices that are registered with the new soc_device_register() function. All devices that are on the same chip should then be registered as child devices of the soc device. The soc bus also exports a few standardised device attributes which allow user space to query the specific type of soc. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * DWC3: use module_pci_driverGreg Kroah-Hartman2012-02-09
| | | | | | | | | | | | | | | | | | This cuts down on the boilerplate code. Cc: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * PCI: Add helper macro for pci_register_driver boilerplateGreg Kroah-Hartman2012-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces the module_pci_driver macro which is a convenience macro for PCI driver modules similar to module_platform_driver. It is intended to be used by drivers which init/exit section does nothing but register/unregister the PCI driver. By using this macro it is possible to eliminate a few lines of boilerplate code per PCI driver. Based on work done by Lars-Peter Clausen <lars@metafoo.de> for other busses (i2c and spi). Cc: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * w1: Use linux/gpio.h rather than asm/gpio.hMark Brown2012-02-09
| | | | | | | | | | | | | | | | | | Direct inclusion of the asm header has long been deprecated by the introduction of gpiolib. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * drivers: hv: Increase the number of VCPUs supported in the guestK. Y. Srinivasan2012-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The current code arbirarily limited the number of CPUs the guest could have. Change that so that we can support the maximum number of CPUs the guest can support. While we use NR_CPUS to size the per-cpu state all we are allocating based on NR_CPUS are the pointers to per-cpu state that will be allocatted in the context of the initializing CPU. This patch triggers a checkpatch warning for the usage of NR_CPU and since all we are allocating a couple of pointers per CPU, it should be ok. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * drivers: hv: kvp: Cleanup the kernel/user protocolK. Y. Srinivasan2012-02-09
| | | | | | | | | | | | | | | | | | Now, cleanup the user/kernel KVP protocol by using the same structure definition that is used for host/guest KVP protocol. This simplifies the code. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * tools: hv: Use hyperv.h to get the KVP definitionsK. Y. Srinivasan2012-02-09
| | | | | | | | | | | | | | | | Now use hyperv.h to get the KVP defines in the KVP user-mode code. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * drivers: hv: Cleanup the kvp related state in hyperv.hK. Y. Srinivasan2012-02-09
| | | | | | | | | | | | | | | | Now cleanup the hyperv.h with regards to KVP definitions. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * ACPI: remove duplicated lines of merging problems with acpi_processor_startYinghai Lu2012-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When checking driver-core tree, found crazying warnings on my setups. [ 216.025849] calling acpi_processor_init+0x0/0x81 @ 1 [ 216.045332] ACPI: Requesting acpi_cpufreq [ 216.047454] Monitor-Mwait will be used to enter C-1 state [ 216.047912] Monitor-Mwait will be used to enter C-3 state [ 216.065270] ACPI: acpi_idle registered with cpuidle [ 216.068241] kobject (ffff8870364a1940): tried to init an initialized object, something is seriously wrong. [ 216.085287] Pid: 1, comm: swapper/0 Not tainted 3.3.0-rc2-tip-yh-02428-ge663840-dirty #247 [ 216.105041] Call Trace: [ 216.105192] [<ffffffff813a9c06>] kobject_init+0x33/0x83 [ 216.124880] [<ffffffff813aa1f8>] kobject_init_and_add+0x23/0x57 [ 216.125158] [<ffffffff819f3a08>] cpuidle_add_sysfs+0x49/0x62 [ 216.144850] [<ffffffff819f2a28>] __cpuidle_register_device+0xe6/0x10e [ 216.145182] [<ffffffff819f2ea4>] cpuidle_register_device+0x25/0x4d [ 216.164912] [<ffffffff81cb5774>] acpi_processor_power_init+0x13e/0x16c [ 216.165205] [<ffffffff81427620>] ? acpi_processor_get_throttling_info+0x128/0x158 [ 216.185012] [<ffffffff81c68ae5>] acpi_processor_start+0x62/0x11d [ 216.204861] [<ffffffff81cb55ff>] acpi_processor_add+0x1b0/0x1e7 [ 216.205144] [<ffffffff81402a7e>] acpi_device_probe+0x4e/0x11c [ 216.225063] [<ffffffff8148f0e7>] really_probe+0x99/0x126 [ 216.225328] [<ffffffff8148f2a3>] driver_probe_device+0x3b/0x56 [ 216.244846] [<ffffffff8148f31d>] __driver_attach+0x5f/0x82 [ 216.245101] [<ffffffff8148f2be>] ? driver_probe_device+0x56/0x56 [ 216.264668] [<ffffffff8148db80>] bus_for_each_dev+0x5c/0x88 [ 216.264942] [<ffffffff8148eea7>] driver_attach+0x1e/0x20 [ 216.284639] [<ffffffff8148eaec>] bus_add_driver+0xca/0x21d [ 216.284903] [<ffffffff81095827>] ? local_clock+0xf/0x3c [ 216.304580] [<ffffffff82814177>] ? acpi_fan_init+0x18/0x18 [ 216.304849] [<ffffffff8148f79b>] driver_register+0x91/0xfe [ 216.324545] [<ffffffff82814177>] ? acpi_fan_init+0x18/0x18 [ 216.324813] [<ffffffff81403705>] acpi_bus_register_driver+0x43/0x45 [ 216.344563] [<ffffffff828141a7>] acpi_processor_init+0x30/0x81 [ 216.344845] [<ffffffff82814177>] ? acpi_fan_init+0x18/0x18 [ 216.364590] [<ffffffff810001e7>] do_one_initcall+0x57/0x134 [ 216.364868] [<ffffffff827e6f8c>] kernel_init+0x146/0x1c0 [ 216.384512] [<ffffffff81d03aa4>] kernel_thread_helper+0x4/0x10 [ 216.384819] [<ffffffff81cfbb5d>] ? retint_restore_args+0xe/0xe [ 216.404578] [<ffffffff827e6e46>] ? start_kernel+0x3ab/0x3ab [ 216.424530] [<ffffffff81d03aa0>] ? gs_change+0xb/0xb [ 216.424793] ------------[ cut here ]------------ [ 216.425038] WARNING: at fs/sysfs/dir.c:502 sysfs_add_one+0x97/0xab() [ 216.444480] Hardware name: Sun Fire X4800 [ 216.444668] sysfs: cannot create duplicate filename '/devices/system/cpu/cpu0/cpuidle' ... It turns out acpi_processor_power_init() get called two time in acpi_processor_add and acpi_processor_start. Found several lines are duplicated in those two functions even related commit move them. The related patches are ok. Not sure how it could happen, looks like git problem. -v2: add back acpi_processor_load_module(pr) to acpi_processor_load_start Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Thomas Renninger <trenn@suse.de> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * cpufreq/gx: Fix the compile errorAlan Cox2012-02-02
| | | | | | | | | | | | | | | | Someone forgot to test this one it seems. Signed-off-by: Alan Cox <alan@linux.intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * drivers: hv: kvp: Move the contents of hv_kvp.h to hyperv.hK. Y. Srinivasan2012-02-02
| | | | | | | | | | | | | | | | | | | | In preparation for consolidating all KVP related defines into a single header file that both the kernel and user level components can use, move the contents of hv_kvp.h into hyperv.h. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * drivers: hv: kvp: Add/cleanup connector definesK. Y. Srinivasan2012-02-02
| | | | | | | | | | | | | | | | | | | | The current KVP code carries some private connector related defines. Update connector.h to have all the KVP defines. As part of this patch get rid of some unused defines. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * Merge 3.3-rc2 into the driver-core-next branch.Greg Kroah-Hartman2012-02-02
| |\ | | | | | | | | | | | | | | | | | | | | | This was done to resolve a merge and build problem with the drivers/acpi/processor_driver.c file. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | sysfs: Update the name hash when renaming sysfs entriesEric W. Biederman2012-01-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a bug introduced with sysfs name hashes where renaming a network device appears to succeed but silently makes the sysfs files for that network device inaccessible. In at least one configuration this bug has stopped networking from coming up during boot. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Tested-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | PCI/XEN: Fix bug introduced by a recent changeAlan Stern2012-01-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch (as1516) fixes a bug introduced during the removal of put_driver() and get_driver() from drivers/pci/xen-pcifront.c. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | USB/PCI/PCMCIA: Clean up new_id and remove_id sysfs attribute routinesAlan Stern2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch (as1514) cleans up some places where new_id and remove_id sysfs attributes are created and deleted. Handling both attributes in a single routine rather than a pair of routines makes the code smaller. It also prevents certain kinds of errors, like one we currently have in the USB subsystem: The removeid attribute is often created even when newid isn't (because the driver's no_dynamid_id flag is set). In the case of the PCMCIA subsystem, the newid attribute is created but never explicitly deleted. The patch adds a deletion routine. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | CPU: Introduce ARCH_HAS_CPU_AUTOPROBE and X86 partsThomas Renninger2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is based on Andi Kleen's work: Implement autoprobing/loading of modules serving CPU specific features (x86cpu autoloading). And Kay Siever's work to get rid of sysdev cpu structures and making use of struct device instead. Before, the cpuid driver had to be loaded to get the x86cpu autoloading feature. With this patch autoloading works through the /sys/devices/system/cpu object Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Dave Jones <davej@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Huang Ying <ying.huang@intel.com> Cc: Len Brown <lenb@kernel.org> Acked-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | x86: autoload microcode driver on Intel and AMD systems v2Andi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't try to describe the actual models for now. v2: Fix typo: X86_VENDOR_ANY -> X86_FAMILY_ANY (trenn) Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | cpufreq: Add support for x86 cpuinfo auto loading v4Andi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This marks all the x86 cpuinfo tables to the CPU specific device drivers, to allow auto loading by udev. This should simplify the distribution startup scripts for this greatly. I didn't add MODULE_DEVICE_IDs to the centrino and p4-clockmod drivers, because those probably shouldn't be auto loaded and the acpi driver be used instead (not fully sure on that, would appreciate feedback) The old nforce drivers autoload based on the PCI ID. ACPI cpufreq is autoloaded in another patch. v3: Autoload gx based on PCI IDs only. Remove cpu check (Dave Jones) v4: Use newly introduce HW_PSTATE feature for powernow-k8 loading Cc: Dave Jones <davej@redhat.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | X86: Introduce HW-Pstate scattered cpuid featureThomas Renninger2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is rather similar to CPB (boot capability) feature and exists since fam10h (can be looked up in AMD's BKDG). The feature is needed for powernow-k8 to cleanup init functions and to provide proper autoloading matching with the new x86cpu modalias feature. Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Dave Jones <davej@redhat.com> Cc: Borislav Petkov <bp@amd64.org> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | HWMON: Convert coretemp to x86 cpuid autoprobingAndi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new x86 cpuid autoprobe interface for the Intel coretemp driver. Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | HWMON: Convert via-cputemp to x86 cpuid autoprobingAndi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new x86 cpuid autoprobe interface. Cc: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | ACPI: Load acpi-cpufreq from processor driver automaticallyAndi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only left over hole in automatic cpufreq driver loading was the loading of ACPI cpufreq. This driver should be loaded when ACPI supports a _PDC method and the CPU vendor wants to use acpi cpufreq. Simply add a request module call to the acpi processor core driver when this is true. This seems like the simplest solution for this. Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | intel-idle: convert to x86_cpu_id auto probingAndi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With this it should be automatically loaded on suitable systems by udev. The old switch () is replaced with a table based approach, this also cleans up the code. Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | crypto: Add support for x86 cpuid auto loading for x86 crypto driversAndi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for auto-loading of crypto drivers based on cpuid features. This enables auto-loading of the VIA and Intel specific drivers for AES, hashing and CRCs. Requires the earlier infrastructure patch to add x86 modinfo. I kept it all in a single patch for now. I dropped the printks when the driver cpuid doesn't match (imho drivers never should print anything in such a case) One drawback is that udev doesn't know if the drivers are used or not, so they will be unconditionally loaded at boot up. That's better than not loading them at all, like it often happens. Cc: Dave Jones <davej@redhat.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Jen Axboe <axboe@kernel.dk> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | Add driver auto probing for x86 features v4Andi Kleen2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a growing number of drivers that support a specific x86 feature or CPU. Currently loading these drivers currently on a generic distribution requires various driver specific hacks and it often doesn't work. This patch adds auto probing for drivers based on the x86 cpuid information, in particular based on vendor/family/model number and also based on CPUID feature bits. For example a common issue is not loading the SSE 4.2 accelerated CRC module: this can significantly lower the performance of BTRFS which relies on fast CRC. Another issue is loading the right CPUFREQ driver for the current CPU. Currently distributions often try all all possible driver until one sticks, which is not really a good way to do this. It works with existing udev without any changes. The code exports the x86 information as a generic string in sysfs that can be matched by udev's pattern matching. This scheme does not support numeric ranges, so if you want to handle e.g. ranges of model numbers they have to be encoded in ASCII or simply all models or families listed. Fixing that would require changing udev. Another issue is that udev will happily load all drivers that match, there is currently no nice way to stop a specific driver from being loaded if it's not needed (e.g. if you don't need fast CRC) But there are not that many cpu specific drivers around and they're all not that bloated, so this isn't a particularly serious issue. Originally this patch added the modalias to the normal cpu sysdevs. However sysdevs don't have all the infrastructure needed for udev, so it couldn't really autoload drivers. This patch instead adds the CPU modaliases to the cpuid devices, which are real devices with full support for udev. This implies that the cpuid driver has to be loaded to use this. This patch just adds infrastructure, some driver conversions in followups. Thanks to Kay for helping with some sysfs magic. v2: Constifcation, some updates v4: (trenn@suse.de): - Use kzalloc instead of kmalloc to terminate modalias buffer - Use uppercase hex values to match correctly against hex values containing letters Cc: Dave Jones <davej@redhat.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Jen Axboe <axboe@kernel.dk> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Huang Ying <ying.huang@intel.com> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | debugfs: add mode, uid and gid optionsLudwig Nussel2012-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cautious admins may want to restrict access to debugfs. Currently a manual chown/chmod e.g. in an init script is needed to achieve that. Distributions that want to make the mount options configurable need to add extra config files. By allowing to set the root inode's uid, gid and mode via mount options no such hacks are needed anymore. Instead configuration becomes straight forward via fstab. Signed-off-by: Ludwig Nussel <ludwig.nussel@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | Eliminate get_driver() and put_driver()Alan Stern2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | Now that there are no users of get_driver() or put_driver(), this patch (as1513) removes those routines completely. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | Remove useless get_driver()/put_driver() callsAlan Stern2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of the removal of get_driver()/put_driver(), this patch (as1512) gets rid of various useless and unnecessary calls in several drivers. In some cases it may be desirable to pin the driver by calling try_module_get(), but that can be done later. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: "David S. Miller" <davem@davemloft.net> CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> CC: Michael Buesch <m@bues.ch> CC: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | cio: remove {get,put}_driverSebastian Ott2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove useless {get,put}_driver - the caller of the functions has to ensure valid driver pointers. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | Dynamic ID addition doesn't need get_driver()Alan Stern2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of the removal of get_driver()/put_driver(), this patch (as1511) changes all the places that add dynamic IDs for drivers. Since these additions are done by writing to the drivers' sysfs attribute files, and the attributes are removed when the drivers are unregistered, there is no reason to take an extra reference to the drivers. The one exception is the pci-stub driver, which calls pci_add_dynid() as part of its registration. But again, there's no reason to take an extra reference here, because the driver can't be unloaded while it is being registered. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Dmitry Torokhov <dmitry.torokhov@gmail.com> CC: Jiri Kosina <jkosina@suse.cz> CC: Jesse Barnes <jbarnes@virtuousgeek.org> CC: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | Driver core: driver_find() drops reference before returningAlan Stern2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of the removal of get_driver()/put_driver(), this patch (as1510) changes driver_find(); it now drops the reference it acquires before returning. The patch also adjusts all the callers of driver_find() to remove the now unnecessary calls to put_driver(). In addition, the patch adds a warning to driver_find(): Callers must make sure the driver they are searching for does not get unloaded while they are using it. This has always been the case; driver_find() has never prevented a driver from being unregistered or unloaded. Hence the patch will not introduce any new bugs. The existing callers all seem to be okay in this respect, however I don't understand the video drivers well enough to be certain about them. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Dmitry Torokhov <dmitry.torokhov@gmail.com> CC: Kyungmin Park <kyungmin.park@samsung.com> CC: Andy Walls <awalls@md.metrocast.net> CC: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | driver-core: Fix possible null reference in subsys_interface_unregisterJonghwan Choi2012-01-24
| | | | | | | | | | | | | | | | | | | | | Check if the sif is not NULL before de-referencing it Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | sysfs: change permissions for /sys from 0755 to 0555Vitaly Kuznetsov2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | There is a misleading difference between /proc and /sys permissions, /proc is 0555 and /sys is 0755. But as it is impossible to create or unlink something in /sys it would be nice to have same permissions. Signed-off-by: Vitaly Kuznetsov <vitty@altlinux.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | drivers: hv: Get rid of some unnecessary codeK. Y. Srinivasan2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current code unnecessarily limits the number of offers we handle. Get rid of this limitation. As part of this cleanup, also get rid of an unused define - MAX_MSG_TYPES. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | dynamic_debug: process multiple debug-queries on a lineJim Cromie2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Insert ddebug_exec_queries() in place of ddebug_exec_query(). It splits the query string on [;\n], and calls ddebug_exec_query() on each. All queries are processed independent of errors, allowing a query to fail, for example when a module is not installed. Empty lines and comments are skipped. Errors are counted, and the last error seen (negative) or the number of callsites found (0 or positive) is returned. Return code checks are altered accordingly. With this, multiple queries can be given in ddebug_query, allowing more selective enabling of callsites. As a side effect, a set of commands can be batched in: cat cmd-file > $DBGMT/dynamic_debug/control We dont want a ddebug_query syntax error to kill the dynamic debug facility, so dynamic_debug_init() zeros ddebug_exec_queries()'s return code after logging the appropriate message, so that ddebug tables are preserved and $DBGMT/dynamic_debug/control file is created. This would be appropriate even without accepting multiple queries. This patch also alters ddebug_change() to return number of callsites matched (which typically is the same as number of callsites changed). ddebug_exec_query() also returns the number found, or a negative value if theres a parse error on the query. Splitting on [;\n] prevents their use in format-specs, but selecting callsites on punctuation is brittle anyway, meaningful and selective substrings are more typical. Note: splitting queries on ';' before handling trailing #comments means that a ';' also terminates a comment, and text after the ';' is treated as another query. This trailing query will almost certainly result in a parse error and thus have no effect other than the error message. The double corner case with unexpected results is: ddebug_query="func foo +p # enable foo ; +p" Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | dynamic_debug: factor vpr_info_dq out of ddebug_parse_queryJim Cromie2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Factor pr_info(query) out of ddebug_parse_query, into vpr_info_dq(), for reuse later. Also change the printed labels: file, func to agree with the query-spec keywords accepted in the control file. Pass "" when string is null, to avoid "(null)" output from sprintf. For format print, use precision to skip last char, assuming its '\n', no great harm if not, its a debug msg. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | dynamic_debug: add trim_prefix() to provide source-root relative pathsJim Cromie2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | trim_prefix(path) skips past the absolute source path root, and returns the pointer to the relative path from there. It is used to shorten the displayed path in $DBGMT/dynamic_debug/control via ddebug_proc_show(), and in ddebug_change() to allow relative filenames to be used in applied queries. For example: ~# echo file kernel/freezer.c +p > $DBGMT/dynamic_debug/control kernel/freezer.c:128 [freezer]cancel_freezing p " clean up: %s\012" trim_prefix(path) insures common prefix before trimming it, so out-of-tree module paths are shown as full absolute paths. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | dynamic_debug: enlarge command/query write bufferJim Cromie2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current query write buffer is 256 bytes, on stack. In comparison, the ddebug_query boot-arg is 1024. Allocate the buffer off heap, and enlarge it to 4096 bytes, big enough for ~100 queries (at 40 bytes each), and error out if not. This makes it play nicely with large query sets (to be added later). The buffer should be enough for most uses, and others should probably be split into subsets. [jbaron@redhat.com: changed USER_BUF_PAGE from 4095 -> 4096 ] Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | dynamic_debug: chop off comments in ddebug_tokenizeJim Cromie2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | If a token begins with #, the remainder of query string is a comment, so drop it. Doing it here avoids '#' in quoted strings. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | dynamic_debug: reduce lineno field to a saner 18 bitsJim Cromie2012-01-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lineno:24 allows files with 4 million lines, an insane file-size, even for never-to-get-in-tree machine generated code. Reduce this to 18 bits, which still allows 256k lines. This is still insanely big, but its not raving mad. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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