summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/firmware.h (follow)
Commit message (Collapse)AuthorAgeFilesLines
* powerpc/pseries: Add FW_FEATURE_PLPKS feature flagAndrew Donnellan2023-04-201-1/+3
| | | | | | | | | | | | | | Add a firmware feature flag, FW_FEATURE_PLPKS, to indicate availability of Platform KeyStore related hcalls. Check this flag in plpks_is_available() and pseries_plpks_init() before trying to make an hcall. Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230224041012.772648-1-ajd@linux.ibm.com
* Revert "powerpc: Remove unused FW_FEATURE_NATIVE references"Michael Ellerman2022-08-261-0/+8
| | | | | | | | | | | | | | | | | | | | This reverts commit 79b74a68486765a4fe685ac4069bc71366c538f5. It broke booting on IBM Cell machines when the kernel is also built with CONFIG_PPC_PS3=y. That's because FW_FEATURE_NATIVE_ALWAYS = 0 does have an important effect, which is to clear the PS3 ALWAYS features from FW_FEATURE_ALWAYS. Note that CONFIG_PPC_NATIVE has since been renamed CONFIG_PPC_HASH_MMU_NATIVE. Fixes: 79b74a684867 ("powerpc: Remove unused FW_FEATURE_NATIVE references") Cc: stable@vger.kernel.org # v5.17+ Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220823115952.1203106-1-mpe@ellerman.id.au
* powerpc/pseries: add FW_FEATURE_WATCHDOG flagScott Cheloha2022-07-201-1/+2
| | | | | | | | | | | | | | PAPR v2.12 specifies a new optional function set, "hcall-watchdog", for the /rtas/ibm,hypertas-functions property. The presence of this function set indicates support for the H_WATCHDOG hypercall. Check for this function set and, if present, set the new FW_FEATURE_WATCHDOG flag. Signed-off-by: Scott Cheloha <cheloha@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220713202335.1217647-3-cheloha@linux.ibm.com
* powerpc/pseries: Interface to represent PAPR firmware attributesPratik R. Sampat2022-03-071-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds a syscall interface to represent the energy and frequency related PAPR attributes on the system using the new H_CALL "H_GET_ENERGY_SCALE_INFO". H_GET_EM_PARMS H_CALL was previously responsible for exporting this information in the lparcfg, however the H_GET_EM_PARMS H_CALL will be deprecated P10 onwards. The H_GET_ENERGY_SCALE_INFO H_CALL is of the following call format: hcall( uint64 H_GET_ENERGY_SCALE_INFO, // Get energy scale info uint64 flags, // Per the flag request uint64 firstAttributeId,// The attribute id uint64 bufferAddress, // Guest physical address of the output buffer uint64 bufferSize // The size in bytes of the output buffer ); As specified in PAPR+ v2.11, section 14.14.3. This H_CALL can query either all the attributes at once with firstAttributeId = 0, flags = 0 as well as query only one attribute at a time with firstAttributeId = id, flags = 1. The output buffer consists of the following 1. number of attributes - 8 bytes 2. array offset to the data location - 8 bytes 3. version info - 1 byte 4. A data array of size num attributes, which contains the following: a. attribute ID - 8 bytes b. attribute value in number - 8 bytes c. attribute name in string - 64 bytes d. attribute value in string - 64 bytes The new H_CALL exports information in direct string value format, hence a new interface has been introduced in /sys/firmware/papr/energy_scale_info to export this information to userspace so that the firmware can add new values without the need for the kernel to be changed. The H_CALL returns the name, numeric value and string value (if exists) The format of exposing the sysfs information is as follows: /sys/firmware/papr/energy_scale_info/ |-- <id>/ |-- desc |-- value |-- value_desc (if exists) |-- <id>/ |-- desc |-- value |-- value_desc (if exists) ... The energy information that is exported is useful for userspace tools such as powerpc-utils. Currently these tools infer the "power_mode_data" value in the lparcfg, which in turn is obtained from the to be deprecated H_GET_EM_PARMS H_CALL. On future platforms, such userspace utilities will have to look at the data returned from the new H_CALL being populated in this new sysfs interface and report this information directly without the need of interpretation. Signed-off-by: Pratik R. Sampat <psampat@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220217105321.52941-2-psampat@linux.ibm.com
* powerpc: Remove unused FW_FEATURE_NATIVE referencesNicholas Piggin2021-12-021-8/+0
| | | | | | | | | | FW_FEATURE_NATIVE_ALWAYS and FW_FEATURE_NATIVE_POSSIBLE are always zero and never do anything. Remove them. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-2-npiggin@gmail.com
* powerpc/pseries: Add support for FORM2 associativityAneesh Kumar K.V2021-08-131-1/+2
| | | | | | | | | | | | | PAPR interface currently supports two different ways of communicating resource grouping details to the OS. These are referred to as Form 0 and Form 1 associativity grouping. Form 0 is the older format and is now considered deprecated. This patch adds another resource grouping named FORM2. Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210812132223.225214-6-aneesh.kumar@linux.ibm.com
* powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITYAneesh Kumar K.V2021-08-131-2/+2
| | | | | | | | | | | Also make related code cleanup that will allow adding FORM2_AFFINITY in later patches. No functional change in this patch. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210812132223.225214-3-aneesh.kumar@linux.ibm.com
* powerpc: remove unneeded semicolonsChengyang Fan2021-02-081-1/+1
| | | | | | | | Remove superfluous semicolons after function definitions. Signed-off-by: Chengyang Fan <cy.fan@huawei.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210125095338.1719405-1-cy.fan@huawei.com
* powerpc: Refactor is_kvm_guest() declaration to new headerSrikar Dronamraju2020-12-031-6/+0
| | | | | | | | | | Only code/declaration movement, in anticipation of doing a KVM-aware vcpu_is_preempted(). No additional changes. Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: Waiman Long <longman@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20201202050456.164005-2-srikar@linux.vnet.ibm.com
* powerpc/book3s64/radix: Add kernel command line option to disable radix GTSEAneesh Kumar K.V2020-07-291-1/+3
| | | | | | | | | | | | | | | | | | | | | | | This adds a kernel command line option that can be used to disable GTSE support. Disabling GTSE implies kernel will make hcalls to invalidate TLB entries. This was done so that we can do VM migration between configs that enable/disable GTSE support via hypervisor. To migrate a VM from a system that supports GTSE to a system that doesn't, we can boot the guest with radix_hcall_invalidate=on, thereby forcing the guest to use hcalls for TLB invalidates. The check for hcall availability is done in pSeries_setup_arch so that the panic message appears on the console. This should only happen on a hypervisor that doesn't force the guest to hash translation even though it can't handle the radix GTSE=0 request via CAS. With radix_hcall_invalidate=on if the hypervisor doesn't support hcall_rpt_invalidate hcall it should force the LPAR to hash translation. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Tested-by: Bharata B Rao <bharata@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200727085908.420806-1-aneesh.kumar@linux.ibm.com
* powerpc/pseries: Add KVM guest doorbell restrictionsNicholas Piggin2020-07-291-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | KVM guests have certain restrictions and performance quirks when using doorbells. This patch moves the EPAPR KVM guest test so it can be shared with PSERIES, and uses that in doorbell setup code to apply the KVM guest quirks and improves IPI performance for two cases: - PowerVM guests may now use doorbells even if they are secure. - KVM guests no longer use doorbells if XIVE is available. There is a valid complaint that "KVM guest" is not a very reasonable thing to test for, it's preferable for the hypervisor to advertise particular behaviours to the guest so they could change if the hypervisor implementation or configuration changes. However in this case we were already assuming a KVM guest worst case, so this patch is about containing those quirks. If KVM later advertises fast doorbells, we should test for that and override the quirks. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200726035155.1424103-4-npiggin@gmail.com
* powerpc/pseries/ras: Avoid calling rtas_token() in NMI pathsNicholas Piggin2020-05-181-0/+1
| | | | | | | | | | | | In the interest of reducing code and possible failures in the machine check and system reset paths, grab the "ibm,nmi-interlock" token at init time. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com> Link: https://lore.kernel.org/r/20200508043408.886394-6-npiggin@gmail.com
* powerpc/pseries/iommu: Separate FW_FEATURE_MULTITCE to put/stuff featuresAlexey Kardashevskiy2020-01-061-2/+4
| | | | | | | | | | | | | | | | | | | | | | | H_PUT_TCE_INDIRECT allows packing up to 512 TCE updates into a single hypercall; H_STUFF_TCE can clear lots in a single hypercall too. However, unlike H_STUFF_TCE (which writes the same TCE to all entries), H_PUT_TCE_INDIRECT uses a 4K page with new TCEs. In a secure VM environment this means sharing a secure VM page with a hypervisor which we would rather avoid. This splits the FW_FEATURE_MULTITCE feature into FW_FEATURE_PUT_TCE_IND and FW_FEATURE_STUFF_TCE. "hcall-multi-tce" in the "/rtas/ibm,hypertas-functions" device tree property sets both; the "multitce=off" kernel command line parameter disables both. This should not cause behavioural change. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Tested-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191216041924.42318-4-aik@ozlabs.ru
* powerpc/powernv: Introduce FW_FEATURE_ULTRAVISORClaudio Carvalho2019-08-301-2/+3
| | | | | | | | | | | | | | | | | In PEF enabled systems, some of the resources which were previously hypervisor privileged are now ultravisor privileged and controlled by the ultravisor firmware. This adds FW_FEATURE_ULTRAVISOR to indicate if PEF is enabled. The host kernel can use FW_FEATURE_ULTRAVISOR, for instance, to skip accessing resources (e.g. PTCR and LDBAR) in case PEF is enabled. Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com> [ andmike: Device node name to "ibm,ultravisor" ] Signed-off-by: Michael Anderson <andmike@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190822034838.27876-4-cclaudio@linux.ibm.com
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner2019-05-301-5/+1
| | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* powerpc/pseries: PAPR persistent memory supportOliver O'Halloran2018-10-181-1/+3
| | | | | | | | | | This patch implements support for discovering storage class memory devices at boot and for handling hotplug of new regions via RTAS hotplug events. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> [mpe: Fix CONFIG_MEMORY_HOTPLUG=n build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries/mm: Introducing FW_FEATURE_BLOCK_REMOVELaurent Dufour2018-09-171-1/+2
| | | | | | | | | | | | | This feature tells if the hcall H_BLOCK_REMOVE is available. Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: clean inclusions of asm/feature-fixups.hChristophe Leroy2018-07-301-1/+0
| | | | | | | | files not using feature fixup don't need asm/feature-fixups.h files using feature fixup need asm/feature-fixups.h Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: move ASM_CONST and stringify_in_c() into asm-const.hChristophe Leroy2018-07-301-1/+1
| | | | | | | | | This patch moves ASM_CONST() and stringify_in_c() into dedicated asm-const.h, then cleans all related inclusions. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: asm-compat.h should include asm-const.h] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Fix duplicate firmware feature for DRC_INFOMichael Ellerman2018-02-221-1/+1
| | | | | | | | | | | | | | | | We had a mid-air collision between two new firmware features, DRMEM_V2 and DRC_INFO, and they ended up with the same value. No one's actually reported any problems, presumably because the new firmware that supports both properties is not widely available, and the two properties tend to be enabled together. Still if we ever had one enabled but not the other, the bugs that could result are many and varied. So fix it. Fixes: 3f38000eda48 ("powerpc/firmware: Add definitions for new drc-info firmware feature") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
* powerpc/firmware: Add definitions for new drc-info firmware featureMichael Bringmann2018-01-211-1/+3
| | | | | | | | | | | Firmware Features: Define new bit flag representing the presence of new device tree property "ibm,drc-info". The flag is used to tell the front end processor whether the Linux kernel supports the new property, and by the front end processor to tell the Linux kernel that the new property is present in the device tree. Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Enable support of ibm,dynamic-memory-v2Nathan Fontenot2018-01-161-1/+2
| | | | | | | | Add required bits to the architecture vector to enable support of the ibm,dynamic-memory-v2 device tree property. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Add hypercall wrappers for hash page table resizingDavid Gibson2017-02-091-2/+3
| | | | | | | | | | | | | | | This adds the hypercall numbers and wrapper functions for the hash page table resizing hypercalls. These hypercall numbers are defined in the PAPR ACR "HPT resizing option". It also adds a new firmware feature flag to track the presence of the HPT resizing calls. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Move FW feature probing out of pseries probe()Benjamin Herrenschmidt2016-07-211-0/+6
| | | | | | | | | We move the function itself to pseries/firmware.c and call it along with almost all other flat device-tree parsers from early_init_devtree() Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [mpe: Move #ifdefs into the header by providing pseries_probe_fw_features()] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: remove FW_FEATURE_OPALv3 and just use FW_FEATURE_OPALStewart Smith2015-12-171-2/+1
| | | | | | | | | | | | Long ago, only in the lab, there was OPALv1 and OPALv2. Now there is just OPALv3, with nobody ever expecting anything on pre-OPALv3 to be cared about or supported by mainline kernels. So, let's remove FW_FEATURE_OPALv3 and instead use FW_FEATURE_OPAL exclusively. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/powernv: Remove OPALv2 firmware define and referencesStewart Smith2015-12-171-3/+1
| | | | | | | | | | | | | | OPALv2 only ever existed in the lab and didn't escape to the world. All OPAL systems in the wild are OPALv3. The probability of there being an OPALv2 system still powered on anywhere inside IBM is approximately zero, let alone anyone expecting to run mainline kernels. So, start to remove references to OPALv2. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Remove the celleb supportMichael Ellerman2015-04-071-9/+1
| | | | | | | | | | | | | | | | | The celleb code has seen no actual development for ~7 years. We (maintainers) have no access to test hardware, and it is highly likely the code has bit-rotted. As far as we're aware the hardware was never widely available, and is certainly no longer available, and no one on the list has shown any interest in it over the years. So remove it. If anyone has one and cares please speak up. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Jeremy Kerr <jk@ozlabs.org>
* powerpc/powernv: Detect OPAL v3 API versionBenjamin Herrenschmidt2013-05-141-1/+3
| | | | | | Future firmwares will support that new version Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Update CPU maps when device tree is updatedJesse Larrew2013-04-261-1/+2
| | | | | | | | | | | | | | | | | | | | Platform events such as partition migration or the new PRRN firmware feature can cause the NUMA characteristics of a CPU to change, and these changes will be reflected in the device tree nodes for the affected CPUs. This patch registers a handler for Open Firmware device tree updates and reconfigures the CPU and node maps whenever the associativity changes. Currently, this is accomplished by marking the affected CPUs in the cpu_associativity_changes_mask and allowing arch_update_cpu_topology() to retrieve the new associativity information using hcall_vphn(). Protecting the NUMA cpu maps from concurrent access during an update operation will be addressed in a subsequent patch in this series. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Update firmware_has_feature() to check architecture vector ↵Nathan Fontenot2013-04-261-1/+3
| | | | | | | | | | | | | | | | | 5 bits The firmware_has_feature() function makes it easy to check for supported features of the hypervisor. This patch extends the capability of firmware_has_feature() to include checking for specified bits in vector 5 of the architecture vector as reported in the device tree. As part of this the #defines used for the architecture vector are re-defined such that each option has the index into vector 5 and the feature bit encoded into it. This makes checking for architecture bits when initiating data for firmware_has_feature much easier. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Use ARRAY_SIZE to iterate over firmware_features_table arrayNathan Fontenot2013-04-261-1/+0
| | | | | | | | | | | | | When iterating over the entries in firmware_features_table we only need to go over the actual number of entries in the array instead of declaring it to be bigger and checking to make sure there is a valid entry in every slot. This patch removes the FIRMWARE_MAX_FEATURES #define and replaces the array looping with the use of ARRAY_SIZE(). Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Cleanup best_energy_hcall detectionMichael Neuling2013-01-101-1/+2
| | | | | | | | | | Currently we search for the best_energy hcall using a custom function. Move this to using the firmware_feature_table. Signed-off-by: Michael Neuling <mikey@neuling.org> cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> cc: Linux PPC dev <linuxppc-dev@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Add set_mode hcallIan Munsie2012-11-151-1/+3
| | | | | | | | | | This new hcall in POWER8 is used to set various resource mode registers. eg. it can set address translation mode on interrupt (note: partition wide scope) Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Remove FW_FEATURE ISERIES from arch codeStephen Rothwell2012-03-211-9/+0
| | | | | | | This is no longer selectable, so just remove all the dependent code. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/powernv: Basic support for OPALBenjamin Herrenschmidt2011-09-201-0/+10
| | | | | | | | Add definition of OPAL interfaces along with the wrappers to call into OPAL runtime and the early device-tree parsing hook to locate the OPAL runtime firmware. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Add page coalescing supportBrian King2011-05-041-1/+2
| | | | | | | | | | | | | | Adds support for page coalescing, which is a feature on IBM Power servers which allows for coalescing identical pages between logical partitions. Hint text pages as coalesce candidates, since they are the most likely pages to be able to be coalesced between partitions. This patch also exports some page coalescing statistics available from firmware via lparcfg. [BenH: Moved a couple of things around to fix compile problems] Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Add VPHN firmware featureJesse Larrew2010-11-291-1/+2
| | | | | | | | This simple patch adds the firmware feature for VPHN to the firmware features bitmask. Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix hypervisor TLB batchingAnton Blanchard2009-10-141-5/+5
| | | | | | | | | | | | | | | | Profiling of a page fault scalability microbenchmark shows flush_hash_range is not calling the batch hpte invalidate hcall (H_BULK_REMOVE). It turns out we have a duplicate firmware feature for hcall-bulk and the current setup code stops after finding the first match. This meant we never batch and always do individual invalidates. The patch below removes the duplicate and shifts FW_FEATURE_CMO to close the gap. With the patch applied the single threaded page fault rate improves from 217169 to 238755 per second on a POWER5 test box, a 10% improvement. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Move include files to arch/powerpc/include/asmStephen Rothwell2008-08-041-0/+132
from include/asm-powerpc. This is the result of a mkdir arch/powerpc/include/asm git mv include/asm-powerpc/* arch/powerpc/include/asm Followed by a few documentation/comment fixups and a couple of places where <asm-powepc/...> was being used explicitly. Of the latter only one was outside the arch code and it is a driver only built for powerpc. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>