kernel.git/arch/powerpc/platforms/pseries, branch linux-4.6.y

powerpc/pseries: Fix PCI config address for DDW

2016-07-27T15:42:08Z

commit 8a934efe94347eee843aeea65bdec8077a79e259 upstream. In commit 8445a87f7092 "powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism", the PE address was replaced with the PCI config address in order to remove dependency on EEH. According to PAPR spec, firmware (pHyp or QEMU) should accept "xxBBSSxx" format PCI config address, not "xxxxBBSS" provided by the patch. Note that "BB" is PCI bus number and "SS" is the combination of slot and function number. This fixes the PCI address passed to DDW RTAS calls. Fixes: 8445a87f7092 ("powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism") Reported-by: Guilherme G. Piccoli Signed-off-by: Gavin Shan Tested-by: Guilherme G. Piccoli Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman

powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism

2016-07-27T15:42:08Z

commit 8445a87f7092bc8336ea1305be9306f26b846d93 upstream. Commit 39baadbf36ce ("powerpc/eeh: Remove eeh information from pci_dn") changed the pci_dn struct by removing its EEH-related members. As part of this clean-up, DDW mechanism was modified to read the device configuration address from eeh_dev struct. As a consequence, now if we disable EEH mechanism on kernel command-line for example, the DDW mechanism will fail, generating a kernel oops by dereferencing a NULL pointer (which turns to be the eeh_dev pointer). This patch just changes the configuration address calculation on DDW functions to a manual calculation based on pci_dn members instead of using eeh_dev-based address. No functional changes were made. This was tested on pSeries, both in PHyp and qemu guest. Fixes: 39baadbf36ce ("powerpc/eeh: Remove eeh information from pci_dn") Reviewed-by: Gavin Shan Signed-off-by: Guilherme G. Piccoli Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman

powerpc/pseries/eeh: Handle RTAS delay requests in configure_bridge

2016-06-24T17:22:03Z

commit 871e178e0f2c4fa788f694721a10b4758d494ce1 upstream. In the "ibm,configure-pe" and "ibm,configure-bridge" RTAS calls, the spec states that values of 9900-9905 can be returned, indicating that software should delay for 10^x (where x is the last digit, i.e. 990x) milliseconds and attempt the call again. Currently, the kernel doesn't know about this, and respecting it fixes some PCI failures when the hypervisor is busy. The delay is capped at 0.2 seconds. Signed-off-by: Russell Currey Acked-by: Gavin Shan Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman

Merge tag 'powerpc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2016-03-19T22:38:41Z

Pull powerpc updates from Michael Ellerman: "This was delayed a day or two by some build-breakage on old toolchains which we've now fixed. There's two PCI commits both acked by Bjorn. There's one commit to mm/hugepage.c which is (co)authored by Kirill. Highlights: - Restructure Linux PTE on Book3S/64 to Radix format from Paul Mackerras - Book3s 64 MMU cleanup in preparation for Radix MMU from Aneesh Kumar K.V - Add POWER9 cputable entry from Michael Neuling - FPU/Altivec/VSX save/restore optimisations from Cyril Bur - Add support for new ftrace ABI on ppc64le from Torsten Duwe Various cleanups & minor fixes from: - Adam Buchbinder, Andrew Donnellan, Balbir Singh, Christophe Leroy, Cyril Bur, Luis Henriques, Madhavan Srinivasan, Pan Xinhui, Russell Currey, Sukadev Bhattiprolu, Suraj Jitindar Singh. General: - atomics: Allow architectures to define their own __atomic_op_* helpers from Boqun Feng - Implement atomic{, 64}_*_return_* variants and acquire/release/ relaxed variants for (cmp)xchg from Boqun Feng - Add powernv_defconfig from Jeremy Kerr - Fix BUG_ON() reporting in real mode from Balbir Singh - Add xmon command to dump OPAL msglog from Andrew Donnellan - Add xmon command to dump process/task similar to ps(1) from Douglas Miller - Clean up memory hotplug failure paths from David Gibson pci/eeh: - Redesign SR-IOV on PowerNV to give absolute isolation between VFs from Wei Yang. - EEH Support for SRIOV VFs from Wei Yang and Gavin Shan. - PCI/IOV: Rename and export virtfn_{add, remove} from Wei Yang - PCI: Add pcibios_bus_add_device() weak function from Wei Yang - MAINTAINERS: Update EEH details and maintainership from Russell Currey cxl: - Support added to the CXL driver for running on both bare-metal and hypervisor systems, from Christophe Lombard and Frederic Barrat. - Ignore probes for virtual afu pci devices from Vaibhav Jain perf: - Export Power8 generic and cache events to sysfs from Sukadev Bhattiprolu - hv-24x7: Fix usage with chip events, display change in counter values, display domain indices in sysfs, eliminate domain suffix in event names, from Sukadev Bhattiprolu Freescale: - Updates from Scott: "Highlights include 8xx optimizations, 32-bit checksum optimizations, 86xx consolidation, e5500/e6500 cpu hotplug, more fman and other dt bits, and minor fixes/cleanup" * tag 'powerpc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (179 commits) powerpc: Fix unrecoverable SLB miss during restore_math() powerpc/8xx: Fix do_mtspr_cpu6() build on older compilers powerpc/rcpm: Fix build break when SMP=n powerpc/book3e-64: Use hardcoded mttmr opcode powerpc/fsl/dts: Add "jedec,spi-nor" flash compatible powerpc/T104xRDB: add tdm riser card node to device tree powerpc32: PAGE_EXEC required for inittext powerpc/mpc85xx: Add pcsphy nodes to FManV3 device tree powerpc/mpc85xx: Add MDIO bus muxing support to the board device tree(s) powerpc/86xx: Introduce and use common dtsi powerpc/86xx: Update device tree powerpc/86xx: Move dts files to fsl directory powerpc/86xx: Switch to kconfig fragments approach powerpc/86xx: Update defconfigs powerpc/86xx: Consolidate common platform code powerpc32: Remove one insn in mulhdu powerpc32: small optimisation in flush_icache_range() powerpc: Simplify test in __dma_sync() powerpc32: move xxxxx_dcache_range() functions inline powerpc32: Remove clear_pages() and define clear_page() inline ...

param: convert some "on"/"off" users to strtobool

2016-03-17T22:09:34Z

This changes several users of manual "on"/"off" parsing to use strtobool. Some side-effects: - these uses will now parse y/n/1/0 meaningfully too - the early_param uses will now bubble up parse errors Signed-off-by: Kees Cook Acked-by: Heiko Carstens Acked-by: Michael Ellerman Cc: Amitkumar Karwar Cc: Andy Shevchenko Cc: Daniel Borkmann Cc: Joe Perches Cc: Kalle Valo Cc: Martin Schwidefsky Cc: Nishant Sarmukadam Cc: Rasmus Villemoes Cc: Steve French Cc: Stephen Rothwell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

powerpc/mm: Handle removing maybe-present bolted HPTEs

2016-03-01T11:04:18Z

At the moment the hpte_removebolted callback in ppc_md returns void and will BUG_ON() if the hpte it's asked to remove doesn't exist in the first place. This is awkward for the case of cleaning up a mapping which was partially made before failing. So, we add a return value to hpte_removebolted, and have it return ENOENT in the case that the HPTE to remove didn't exist in the first place. In the (sole) caller, we propagate errors in hpte_removebolted to its caller to handle. However, we handle ENOENT specially, continuing to complete the unmapping over the specified range before returning the error to the caller. This means that htab_remove_mapping() will work sanely on a partially present mapping, removing any HPTEs which are present, while also returning ENOENT to its caller in case it's important there. There are two callers of htab_remove_mapping(): - In remove_section_mapping() we already WARN_ON() any error return, which is reasonable - in this case the mapping should be fully present - In vmemmap_remove_mapping() we BUG_ON() any error. We change that to just a WARN_ON() in the case of ENOENT, since failing to remove a mapping that wasn't there in the first place probably shouldn't be fatal. Signed-off-by: David Gibson Reviewed-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc: Fix misspellings in comments.

2016-03-01T08:27:20Z

Signed-off-by: Adam Buchbinder Signed-off-by: Michael Ellerman

powerpc/pseries: Enable kernel CPU dlpar from sysfs

2015-12-17T11:41:03Z

Enable new kernel cpu hotplug functionality by allowing cpu dlpar requests to be initiated from sysfs. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Add CPU dlpar add functionality

2015-12-17T11:41:02Z

Add the ability to hotplug add cpus via rtas hotplug events by either specifying the drc index of the CPU to add, or providing a count of the number of CPUs to add. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Add CPU dlpar remove functionality

2015-12-17T11:41:02Z

Add the ability to dlpar remove CPUs via hotplug rtas events, either by specifying the drc-index of the CPU to remove or providing a count of cpus to remove. To remove multiple cpus in a single request we create a list of possible DR (Dynamic Reconfiguration) cpus and their drc indexes that can be removed. We can then traverse the list remove each cpu and easily clean up in any cases of failure. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman