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* powerpc/book3e-64/kexec: create an identity TLB mappingTiejun Chen2015-10-281-1/+51
| | | | | | | | | book3e has no real MMU mode so we have to create an identity TLB mapping to make sure we can access the real physical address. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> [scottwood: cleanup, and split off some changes] Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/book3e-64: Don't limit paca to 256 MiBScott Wood2015-10-281-2/+7
| | | | | | | This limit only makes sense on book3s, and on book3e it can cause problems with kdump if we don't have any memory under 256 MiB. Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/book3e/kdump: Enable crash_kexec_wait_realmodeScott Wood2015-10-281-3/+3
| | | | | | | While book3e doesn't have "real mode", we still want to wait for all the non-crash cpus to complete their shutdown. Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/book3e: support CONFIG_RELOCATABLETiejun Chen2015-10-283-7/+28
| | | | | | | | | | | | | | book3e is different with book3s since 3s includes the exception vectors code in head_64.S as it relies on absolute addressing which is only possible within this compilation unit. So we have to get that label address with got. And when boot a relocated kernel, we should reset ipvr properly again after .relocate. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> [scottwood: cleanup and ifdef removal] Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/booke64: Fix args to copy_and_flushTiejun Chen2015-10-281-4/+7
| | | | | | | | | | | | | | Convert r4/r5, not r6, to a virtual address when calling copy_and_flush. Otherwise, r3 is already virtual, and copy_to_flush tries to access r3+r6, PAGE_OFFSET gets added twice. This isn't normally seen because on book3e we normally enter with the kernel at zero and thus skip copy_to_flush -- but it will be needed for kexec support. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> [scottwood: split patch and rewrote changelog] Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/book3e-64: rename interrupt_end_book3e with __end_interruptsTiejun Chen2015-10-281-4/+4
| | | | | | | | | Rename 'interrupt_end_book3e' to '__end_interrupts' so that the symbol can be used by both book3s and book3e. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> [scottwood: edit changelog] Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/e6500: kexec: Handle hardware threadsScott Wood2015-10-282-0/+62
| | | | | | | The new kernel will be expecting secondary threads to be disabled, not spinning. Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/85xx: Implement 64-bit kexec supportTiejun Chen2015-10-281-0/+11
| | | | | | | | Unlike 32-bit 85xx kexec, we don't do a core reset. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> [scottwood: edit changelog, and cleanup] Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/fsl-booke-64: Don't limit ppc64_rma_size to one TLB entryScott Wood2015-10-283-15/+34
| | | | | | | | | | | | This is required for kdump to work when loaded at at an address that does not fall within the first TLB entry -- which can easily happen because while the lower limit is enforced via reserved memory, which doesn't affect how much is mapped, the upper limit is enforced via a different mechanism that does. Thus, more TLB entries are needed than would normally be used, as the total memory to be mapped might not be a power of two. Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/85xx: Load all early TLB entries at onceScott Wood2015-10-235-3/+92
| | | | | | | | | | | | | | | | | Use an AS=1 trampoline TLB entry to allow all normal TLB1 entries to be loaded at once. This avoids the need to keep the translation that code is executing from in the same TLB entry in the final TLB configuration as during early boot, which in turn is helpful for relocatable kernels (e.g. kdump) where the kernel is not running from what would be the first TLB entry. On e6500, we limit map_mem_in_cams() to the primary hwthread of a core (the boot cpu is always considered primary, as a kdump kernel can be entered on any cpu). Each TLB only needs to be set up once, and when we do, we don't want another thread to be running when we create a temporary trampoline TLB1 entry. Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/fsl_pci: Don't set up inbound windows in kdump crash kernelScott Wood2015-10-171-23/+61
| | | | | | | | | | | | Otherwise, because the top end of the crash kernel is treated as the absolute top of memory rather than the beginning of a reserved region, in-flight DMA from the previous kernel that targets areas above the crash kernel can trigger a storm of PCI errors. We only do this for kdump, not normal kexec, in case kexec is being used to upgrade to a kernel that wants a different inbound memory map. Signed-off-by: Scott Wood <scottwood@freescale.com> Cc: Mingkai Hu <Mingkai.hu@freescale.com>
* powerpc/85xx: Don't use generic timebase sync on 64-bitScott Wood2015-10-171-1/+1
| | | | | | | | | | | | | | | 85xx currently uses the generic timebase sync mechanism when CONFIG_KEXEC is enabled, because 32-bit 85xx kexec support does a hard reset of each core. 64-bit 85xx kexec does not do this, so we neither need nor want this (nor is the generic timebase sync code built on ppc64). FWIW, I don't like the fact that the hard reset is done on 32-bit kexec, and I especially don't like the timebase sync being triggered only on the presence of CONFIG_KEXEC rather than actually booting in that environment, but that's beyond the scope of this patch... Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/fsl-corenet: Disable coreint if kexec is enabledScott Wood2015-10-171-2/+4
| | | | | | | | | | | | | | | Problems have been observed in coreint (EPR) mode if interrupts are left pending (due to the lack of device quiescence with kdump) after having tried to deliver to a CPU but unable to deliver due to MSR[EE] -- interrupts no longer get reliably delivered in the new kernel. I tried various ways of fixing it up inside the crash kernel itself, and none worked (including resetting the entire mpic). Masking all interrupts and issuing EOIs in the crashing kernel did help a lot of the time, but the behavior was not consistent. Thus, stick to standard IACK mode when kdump is a possibility. Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/fsl-booke-64: Allow booting from the secondary threadScott Wood2015-10-171-7/+20
| | | | | | | | | | This allows SMP kernels to work as kdump crash kernels. While crash kernels don't really need to be SMP, this prevents things from breaking if a user does it anyway (which is not something you want to only find out once the main kernel has crashed in the field, especially if whether it works or not depends on which cpu crashed). Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/b4860: Renamed the L2 cachespoonam aggrwal2015-10-175-14/+12Star
| | | | | | | | | | | | To make provision for more than one L2 caches in the system, change the name from L2 to L2_1; same as in T4 platforms. * Also remove the L2 entry from common file "arch/powerpc/boot/dts/fsl/b4si-post.dtsi" Keep them only in separate files for b4860 and b4420. Signed-off-by: Shaveta Leekha <shaveta@freescale.com> Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/fsl: Move Freescale device tree files into fsl folderHongtao Jia2015-10-17105-143/+146
| | | | | | | | | | | | | | It makes no sense that some Freescale device tree files are in fsl directory while some others not. This patch move Freescale device tree files into fsl folder. To do that the following two steps are made: - Move Freescale device tree files into fsl folder. - Update the include path in these files from "fsl/*.dtsi" to "*.dtsi". Please add "fsl/" prefix when you make dtb using Makefile. Signed-off-by: Jia Hongtao <hongtao.jia@freescale.com> [scottwood: fixed cuImage rule] Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/b4860: Removed LIODN register from sRIO nodepoonam aggrwal2015-10-171-2/+0Star
| | | | | | | | | In case of B4860 LIODN register for sRIO is not in GUTs block but in the sRIO register space. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/85xx: Add support for Varisys Cyrus boardAndy Fleming2015-10-172-0/+156
| | | | | | | | | | | This board uses a P5020 chip, and boots just fine using the corenet_generic code. The device tree is very similar to the P5020DS, except that there is no Flash memory. The environment is, instead, stored on an MMC card on the motherboard. Signed-off-by: Andy Fleming <afleming@gmail.com> [scottwood: fixed trailing whitespace] Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/fsl_pci: Check for get_user/probe_kernel_address failureScott Wood2015-10-171-1/+1
| | | | | | | | Signed-off-by: Scott Wood <scottwood@freescale.com> Reported-by: Andrew Morton <akpm@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Hongtao Jia <hongtao.jia@freescale.com>
* powerpc/t104xd4rdb: add DS26522 nodes to device treeZhao Qiang2015-10-171-0/+10
| | | | | | | | DS26522 is used for tdm, configured by SPI bus. Add nodes under spi node to t104xd4rdb.dtsi. Signed-off-by: Zhao Qiang <qiang.zhao@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/dts: don't fall back to fsl,pq3-gpio for fsl,mpc8572-gpioUwe Kleine-König2015-10-172-2/+2
| | | | | | | | | | | | While the handling of fsl,pq3-gpio and fsl,mpc8572-gpio is done in the same driver and the two hardly differ, the latter controller needs a workaround for an erratum in the gpio_get callback. To make this difference more explicit remove fsl,pq3-gpio from the list of compatibles for mpc8572 machines. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/dts: Add and fix 1588 timer node for eTSECYangbo Lu2015-10-178-6/+90
| | | | | | | | | | | | | | | | | | Add 1588 timer node in files: arch/powerpc/boot/dts/bsc9131rdb.dtsi arch/powerpc/boot/dts/bsc9132qds.dtsi arch/powerpc/boot/dts/p1010rdb.dtsi arch/powerpc/boot/dts/p1020rdb-pd.dts arch/powerpc/boot/dts/p1021rdb-pc.dtsi arch/powerpc/boot/dts/p1022ds.dtsi arch/powerpc/boot/dts/p1025twr.dtsi For P2020RDB-PC, registers' values should be calculated based on default 1588 reference clock(300MHz) not 250MHz, and fix this in file: arch/powerpc/boot/dts/p2020rdb-pc.dtsi Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/corenet: use the mixed mode of MPIC when enabling CPU hotplugchenhui zhao2015-10-171-0/+8
| | | | | | | | Core reset may cause issue if using the proxy mode of MPIC. Use the mixed mode of MPIC if enabling CPU hotplug. Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/xmon: Add some more elements to the existing PACA dump listMichael Ellerman2015-10-151-4/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a set of new elements to the existing PACA dump list inside an xmon session which can be listed below improving the overall xmon debug support. With this patch, a typical xmon PACA dump looks something like this. paca for cpu 0x0 @ c00000000fdc0000: possible = yes present = yes online = yes lock_token = 0x8000 (0xa) paca_index = 0x0 (0x8) kernel_toc = 0xc000000001393200 (0x10) kernelbase = 0xc000000000000000 (0x18) kernel_msr = 0xb000000000001033 (0x20) emergency_sp = 0xc00000003fff0000 (0x28) mc_emergency_sp = 0xc00000003ffec000 (0x2e0) in_mce = 0x0 (0x2e8) hmi_event_available = 0x0 (0x2ea) data_offset = 0x1fe7b0000 (0x30) hw_cpu_id = 0x0 (0x38) cpu_start = 0x1 (0x3a) kexec_state = 0x0 (0x3b) slb_shadow[0]: = 0xc000000008000000 0x40016e7779000510 slb_shadow[1]: = 0xd000000008000001 0x400142add1000510 vmalloc_sllp = 0x510 (0x1b8) slb_cache_ptr = 0x4 (0x1ba) slb_cache[0]: = 0x000000000003f000 slb_cache[1]: = 0x0000000000000001 slb_cache[2]: = 0x0000000000000003 slb_cache[3]: = 0x0000000000001000 slb_cache[4]: = 0x0000000000001000 slb_cache[5]: = 0x0000000000000000 slb_cache[6]: = 0x0000000000000000 slb_cache[7]: = 0x0000000000000000 dscr_default = 0x0 (0x58) __current = 0xc000000001331e80 (0x290) kstack = 0xc000000001393e30 (0x298) stab_rr = 0x11 (0x2a0) saved_r1 = 0xc0000001fffef5e0 (0x2a8) trap_save = 0x0 (0x2b8) soft_enabled = 0x0 (0x2ba) irq_happened = 0x1 (0x2bb) io_sync = 0x0 (0x2bc) irq_work_pending = 0x0 (0x2bd) nap_state_lost = 0x0 (0x2be) sprg_vdso = 0x0 (0x2c0) tm_scratch = 0x8000000100009033 (0x2c8) core_idle_state_ptr = (null) (0x2d0) thread_idle_state = 0x0 (0x2d8) thread_mask = 0x0 (0x2d9) subcore_sibling_mask = 0x0 (0x2da) user_time = 0x0 (0x2f0) system_time = 0x0 (0x2f8) user_time_scaled = 0x0 (0x300) starttime = 0x3f462418b5cf4 (0x308) starttime_user = 0x3f4622a57092a (0x310) startspurr = 0xd62a5718 (0x318) utime_sspurr = 0x0 (0x320) stolen_time = 0x0 (0x328) Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> [mpe: Endian swap slb_shadow before display, minor formatting] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/xmon: Paginate kernel log buffer displaySam bobroff2015-10-151-3/+3
| | | | | | | | The kernel log buffer is often much longer than the size of a terminal so paginate it's output. Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/xmon: Paged output for paca displaySam bobroff2015-10-153-2/+83
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The paca display is already more than 24 lines, which can be problematic if you have an old school 80x24 terminal, or more likely you are on a virtual terminal which does not scroll for whatever reason. This patch adds a new command "#", which takes a single (hex) numeric argument: lines per page. It will cause the output of "dp" and "dpa" to be broken into pages, if necessary. Sample output: 0:mon> # 10 0:mon> dp1 paca for cpu 0x1 @ c00000000fdc0480: possible = yes present = yes online = yes lock_token = 0x8000 (0x8) paca_index = 0x1 (0xa) kernel_toc = 0xc000000000eb2400 (0x10) kernelbase = 0xc000000000000000 (0x18) kernel_msr = 0xb000000000001032 (0x20) emergency_sp = 0xc00000003ffe8000 (0x28) mc_emergency_sp = 0xc00000003ffe4000 (0x2e0) in_mce = 0x0 (0x2e8) data_offset = 0x7f170000 (0x30) hw_cpu_id = 0x8 (0x38) cpu_start = 0x1 (0x3a) kexec_state = 0x0 (0x3b) [Hit a key (a:all, q:truncate, any:next page)] 0:mon> __current = 0xc00000007e696620 (0x290) kstack = 0xc00000007e6ebe30 (0x298) stab_rr = 0xb (0x2a0) saved_r1 = 0xc00000007ef37860 (0x2a8) trap_save = 0x0 (0x2b8) soft_enabled = 0x0 (0x2ba) irq_happened = 0x1 (0x2bb) io_sync = 0x0 (0x2bc) irq_work_pending = 0x0 (0x2bd) nap_state_lost = 0x0 (0x2be) 0:mon> Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> [mpe: Use bool, make some variables static] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mpc5xxx: Use of_get_next_parent to simplify codeChristophe Jaillet2015-10-151-4/+1Star
| | | | | | | | of_get_next_parent can be used to simplify the while() loop and avoid the need of a temp variable. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/numa: Use of_get_next_parent to simplify codeChristophe Jaillet2015-10-151-4/+1Star
| | | | | | | | of_get_next_parent can be used to simplify the while() loop and avoid the need of a temp variable. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Delete old orphaned PrPMC 280/2800 DTS and boot file.Paul Gortmaker2015-10-152-868/+0Star
| | | | | | | | | | | | | | | In commit 3c8464a9b12bf83807b6e2c896d7e7b633e1cae7 ("powerpc: Delete old PrPMC 280/2800 support") we got rid of most of the C code, and the Makefile/Kconfig hooks, but it seems I left the platform's DTS file orphaned in the tree as well as the boot code. Here we get rid of them both. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: discard .exit.data at runtimeStephen Rothwell2015-10-151-0/+6
| | | | | | | | | | | | | .exit.text is discarded at run time and there are some references from that to .exit.data, so we need to discard .exit.data at run time as well. Fixes these errors: `.exit.data' referenced in section `.exit.text' of drivers/built-in.o: defined in discarded section `.exit.data' of drivers/built-in.o `.exit.data' referenced in section `.exit.text' of drivers/built-in.o: defined in discarded section `.exit.data' of drivers/built-in.o Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/eeh: atomic_dec_if_positive() to update passthru countGavin Shan2015-10-151-2/+1Star
| | | | | | | | | No need to have two atomic opertions (update and fetch/check) when decreasing PE's number of passed devices as one atomic operation is enough. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pci: export pcibios_free_controller()Andrew Donnellan2015-10-151-0/+1
| | | | | | | | Export pcibios_free_controller(), so it can be used by the cxl module to free virtual PHBs. Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Individual System V IPC system callsSam bobroff2015-10-153-1/+25
| | | | | | | | | | | | This patch provides individual system call numbers for the following System V IPC system calls, on PowerPC, so that they do not need to be multiplexed: * semop, semget, semctl, semtimedop * msgsnd, msgrcv, msgget, msgctl * shmat, shmdt, shmget, shmctl Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Drop always true CONFIG_PSERIES_MSIMichael Ellerman2015-10-152-7/+1Star
| | | | | | | | Now that pseries selects PCI_MSI && PCI, EEH will always be true, and therefore CONFIG_PSERIES_MSI will always be true. So drop it, and move msi.o to obj-y. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Move PCI objects to obj-yMichael Ellerman2015-10-151-3/+2Star
| | | | | | | | | | Make it entirely clear in the Makefile that we always build the pci related files by moving them to obj-y. Note that CONFIG_EEH is now always enabled on pseries, because it depends on PSERIES && PCI. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Remove use of CONFIG_PCIMichael Ellerman2015-10-152-14/+0Star
| | | | | | | Now that we always have CONFIG_PCI=y for pseries, we can stop guarding code with CONFIG_PCI ifdefs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: Make PCI non-optionalMichael Ellerman2015-10-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | The pseries build with PCI=n looks to have been broken for at least 5 years, and no one's noticed or cared. Following the obvious breakages backward, the first commit I can find that builds is the parent of 2eb4afb69ff3 ("powerpc/pci: Move pseries code into pseries platform specific area") from April 2009. A distro would never ship a PCI=n kernel, so it is only useful for folks building custom kernels. Also on KVM the virtio devices appear on PCI, so it would only be useful if you were building kernels specifically to run on PowerVM and with no PCI devices. The added code complexity, and testing load (which we've clearly not been doing), is not justified by the small reduction in kernel size for such a niche use case. So just make PCI non-optional on pseries. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mm: Differentiate between hugetlb and THP during page walkAneesh Kumar K.V2015-10-1212-24/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We need to properly identify whether a hugepage is an explicit or a transparent hugepage in follow_huge_addr(). We used to depend on hugepage shift argument to do that. But in some case that can result in wrong results. For ex: On finding a transparent hugepage we set hugepage shift to PMD_SHIFT. But we can end up clearing the thp pte, via pmdp_huge_get_and_clear. We do prevent reusing the pfn page via the usage of kick_all_cpus_sync(). But that happens after we updated the pte to 0. Hence in follow_huge_addr() we can find hugepage shift set, but transparent huge page check fail for a thp pte. NOTE: We fixed a variant of this race against thp split in commit 691e95fd7396905a38d98919e9c150dbc3ea21a3 ("powerpc/mm/thp: Make page table walk safe against thp split/collapse") Without this patch, we may hit the BUG_ON(flags & FOLL_GET) in follow_page_mask occasionally. In the long term, we may want to switch ppc64 64k page size config to enable CONFIG_ARCH_WANT_GENERAL_HUGETLB Reported-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/mm: Disable hugepd for 64K page size.Aneesh Kumar K.V2015-10-122-0/+34
| | | | | | | | | | After commit e2b3d202d1dba8f3546ed28224ce485bc50010be ("powerpc: Switch 16GB and 16MB explicit hugepages to a different page table format"), we don't need to support is_hugepd() for 64K page size. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries/hvcserver: don't memset pi_buff if it is nullColin Ian King2015-10-081-1/+1
| | | | | | | | pi_buff is being memset before it is sanity checked. Move the memset after the null pi_buff sanity check to avoid an oops. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc: Fix _ALIGN_* errors due to type difference.Aneesh Kumar K.V2015-10-082-4/+5
| | | | | | | | | | | | | | This avoid errors like unsigned int usize = 1 << 30; int size = 1 << 30; unsigned long addr = 64UL << 30 ; value = _ALIGN_DOWN(addr, usize); -> 0 value = _ALIGN_DOWN(addr, size); -> 0x1000000000 Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/kexec: Wait 1s for secondaries to enter OPALSamuel Mendoza-Jonas2015-10-061-8/+13
| | | | | | | | Always include a timeout when waiting for secondary cpus to enter OPAL in the kexec path, rather than only when crashing. Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/8xx: Shorten irq_chip name for the SIUChristophe Leroy2015-10-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | show_interrupts() expects the irq_chip name to be max 8 characters otherwise everything get misaligned # cat /proc/interrupts CPU0 17: 0 CPM PIC 0 Level error 19: 0 MPC8XX SIU 15 Level tbint 20: 90 CPM PIC 4 Level cpm_uart 38: 29746 MPC8XX SIU 5 Level fs_enet-mac 39: 0 MPC8XX SIU 7 Level fs_enet-mac 47: 401 CPM PIC 5 Level fsl_spi 68: 1 MPC8XX SIU 2 Level phy_interrupt, phy_interrupt, phy_interrupt LOC: 7225485 Local timer interrupts for timer event device LOC: 9 Local timer interrupts for others SPU: 0 Spurious interrupts PMI: 0 Performance monitoring interrupts MCE: 0 Machine check exceptions Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/msi: Free the bitmap if it was slab allocatedDenis Kirjanov2015-10-052-4/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | During the MSI bitmap test on boot kmemleak spews the following trace: unreferenced object 0xc00000016e86c900 (size 64): comm "swapper/0", pid 1, jiffies 4294893173 (age 518.024s) hex dump (first 32 bytes): 00 00 01 ff 7f ff 7f 37 00 00 00 00 00 00 00 00 .......7........ ff ff ff ff ff ff ff ff 01 ff ff ff ff ff ff ff ................ backtrace: [<c00000000003eebc>] .zalloc_maybe_bootmem+0x3c/0x380 [<c000000000042d6c>] .msi_bitmap_alloc+0x3c/0xb0 [<c000000000a9aff8>] .msi_bitmap_selftest+0x30/0x2b4 [<c0000000000090f4>] .do_one_initcall+0xd4/0x270 [<c000000000a8e250>] .kernel_init_freeable+0x1a0/0x280 [<c000000000009b5c>] .kernel_init+0x1c/0x120 [<c000000000007fbc>] .ret_from_kernel_thread+0x58/0x9c Add a flag to msi_bitmap for tracking allocations from slab and memblock so we can properly free/handle memory in msi_bitmap_free(). Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> [mpe: Reword changelog & use bitmap_from_slab in the if] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: re-use code from of_helpers moduleAndy Shevchenko2015-10-051-26/+5Star
| | | | | | | | | The derive_parent() has similar semantics to what we have in newly introduced of_helpers module. The replacement reduces code base and propagates the actual error code to the caller. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: handle nodes without '/'Andy Shevchenko2015-10-051-3/+3
| | | | | | | | | | In case we have node without '/' strrchr() returns NULL which might lead to crash. Replace strrchr() by kbasename() and modify condition to avoid such behaviour. Suggested-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: replace kmalloc + strlcpyAndy Shevchenko2015-10-051-2/+1Star
| | | | | | | The helper kstrndup() will do the same in one line. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: fix a potential memory leakAndy Shevchenko2015-10-051-4/+2Star
| | | | | | | | In case we have a full node name like /foo/bar and /foo is not found the parent_path left unfreed. So, free a memory before return to a caller. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/pseries: extract of_helpers moduleAndy Shevchenko2015-10-054-32/+49
| | | | | | | | | Extract a new module to share the code between other modules. There is no functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/nvram: Fix function name in some errors messages.Christophe Jaillet2015-10-021-7/+7
| | | | | | | | 'nvram_create_os_partition' should be 'nvram_create_partition'. Use __func__ to have it right, as done elsewhere in this file. Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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