- 19 Oct, 2015 2 commits
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Michael Ellerman authored
The TUNE_CELL option allows you to build a kernel that runs on multiple CPUs but is tuned (ie. optimised) to run on Cell CPUs. Now days no one is building a distro in that fashion, and any users who are building custom kernels for their Cell machines are better off building with CONFIG_CELL_CPU, which builds a kernel that only runs on Cell and therefore can be optimised even more aggresively. Dropping the option also avoids confusing other users, who are presented with an option to tune for Cell when they are not building for a Cell CPU at all. Suggested-by:
Thomas Huth <thuth@redhat.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Denis Kirjanov authored
EBB (Event Based Branches) are currently only available on POWER8, so we should skip them on other CPUs. I've found that at least one test loops forever on 970MP (cycles_with_freeze_test). Signed-off-by:
Denis Kirjanov <kda@linux-powerpc.org> [mpe: Minor change log editing, add skip to cpu_event_vs_ebb_test] Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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- 15 Oct, 2015 20 commits
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Michael Ellerman authored
When building against older kernel headers, currently the tm-syscall test fails to build because PPC_FEATURE2_HTM_NOSC is not defined. Tweak the test so that if PPC_FEATURE2_HTM_NOSC is not defined it still builds, but prints a warning at run time and marks the test as skipped. Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
This list has gotten too long. Split it into individual lines and sort them, so in future we can add new entries more cleanly. Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
This is just a simple test which confirms that the individual IPC syscalls are all available. Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
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>
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Sam bobroff authored
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>
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Sam bobroff authored
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>
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Christophe Jaillet authored
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>
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Christophe Jaillet authored
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>
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Paul Gortmaker authored
In commit 3c8464a9 ("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>
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Aaro Koskinen authored
CONFIG_INPUT_KEYBDEV does not exist and no additional keyboard-specific options are needed to get the keyboard working. Signed-off-by:
Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Stephen Rothwell authored
.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>
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Gavin Shan authored
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>
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Andrew Donnellan authored
When adding a vPHB in cxl_pci_vphb_add(), we allocate a pci_controller struct using pcibios_alloc_controller(). However, we don't free it in cxl_pci_vphb_remove(), causing a leak. Call pcibios_free_controller() in cxl_pci_vphb_remove() to free the vPHB data structure correctly. Signed-off-by:
Daniel Axtens <dja@axtens.net> Signed-off-by:
Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Andrew Donnellan authored
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>
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Sam bobroff authored
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>
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Michael Ellerman authored
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>
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Michael Ellerman authored
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>
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Michael Ellerman authored
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>
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Michael Ellerman authored
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 2eb4afb6 ("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>
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Michael Ellerman authored
My recent commit d2036f30 ("scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target"), contained a bug in that when it checks if KBUILD_DEFCONFIG is a file it forgets to prepend $(srctree) to the path. This causes the build to fail when building out of tree (with O=), and when the value of KBUILD_DEFCONFIG is 'defconfig'. In that case we will fail to find the 'defconfig' file, because we look in the build directory not $(srctree), and so we will call Make again with 'defconfig' as the target. From there we loop infinitely calling 'make defconfig' again and again. The fix is simple, we need to look for the file under $(srctree). Fixes: d2036f30 ("scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target") Reported-by:
Olof Johansson <olof@lixom.net> Acked-by:
Michal Marek <mmarek@suse.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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- 12 Oct, 2015 2 commits
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Aneesh Kumar K.V authored
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 691e95fd ("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>
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Aneesh Kumar K.V authored
After commit e2b3d202 ("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>
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- 08 Oct, 2015 2 commits
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Colin Ian King authored
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>
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Aneesh Kumar K.V authored
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>
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- 06 Oct, 2015 2 commits
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Samuel Mendoza-Jonas authored
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>
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Christophe Leroy authored
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>
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- 05 Oct, 2015 6 commits
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Denis Kirjanov authored
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>
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Andy Shevchenko authored
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>
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Andy Shevchenko authored
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>
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Andy Shevchenko authored
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>
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Andy Shevchenko authored
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>
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Andy Shevchenko authored
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>
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- 02 Oct, 2015 3 commits
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Denis Kirjanov authored
Fix the memory leak in create_gatt_table: we've lost a kfree on the exit path for the pages array allocated in uninorth_create_gatt_table Signed-off-by:
Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Christophe Jaillet authored
'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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Christophe Jaillet authored
If 'nvram_write_header' fails, then 'new_part' should be freed, otherwise, there is a memory leak. Signed-off-by:
Christophe Jaillet <christophe.jaillet@wanadoo.fr> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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- 01 Oct, 2015 3 commits
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Michael Ellerman authored
Based directly on ppc64_defconfig using merge_config. Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Arch Makefiles can set KBUILD_DEFCONFIG to tell kbuild the name of the defconfig that should be built by default. However currently there is an assumption that KBUILD_DEFCONFIG points to a file at arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG). We would like to use a target, using merge_config, as our defconfig, so adapt the logic in scripts/kconfig/Makefile to allow that. To minimise the chance of breaking anything, we first check if KBUILD_DEFCONFIG is a file, and if so we do the old logic. If it's not a file, then we call the top-level Makefile with KBUILD_DEFCONFIG as the target. Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Acked-by:
Michal Marek <mmarek@suse.com>
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Aneesh Kumar K.V authored
This add helper virt_to_pfn and remove the opencoded usage of the same. Signed-off-by:
Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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