- 28 Aug, 2017 22 commits
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Michael Ellerman authored
Since commit 00b9cfa3 ("mac80111: Add GCMP and GCMP-256 ciphers") we no longer need to set CONFIG_CRYPTO_GCM in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit 3491244c ("crypto: echainiv - Set Kconfig default to m") we no longer need to set CONFIG_CRYPTO_NULL in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit 00b9cfa3 ("mac80111: Add GCMP and GCMP-256 ciphers") we no longer need to set CONFIG_CRYPTO_NULL in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit 826775bb ("crypto: drbg - Add select on sha256") we no longer need to set CONFIG_CRYPTO_SHA256 in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit 12cb3a1c ("crypto: xts - Add ECB dependency") we no longer need to set CONFIG_CRYPTO_ECB in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit 401e4238 ("crypto: rng - Make DRBG the default RNG") we no longer need to set CONFIG_CRYPTO_HMAC in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit ccf5c442 ("crypto: vmx - Convert to CPU feature based module autoloading") we no longer need to set CONFIG_CRYPTO_DEV_VMX_ENCRYPT in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
In commit a85406af ("netfilter: conntrack: built-in support for SCTP"), NF_CT_PROTO_SCTP switched from tristate to bool and became default y. Similarly in commit 9b91c96c ("netfilter: conntrack: built-in support for UDPlite"), NF_CT_PROTO_UDPLITE switched from tristate to bool and became default y. We had a few configs which set them to =m, which is no longer valid. We don't need to change them to =y because both symbols are default y and are enabled automatically based on the other symbols in the affected defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
In commit a5e4bd99 ("of_mdio: select fixed phy support unconditionally"), CONFIG_OF_MDIO began selecting CONFIG_FIXED_PHY. That means we no longer need to set it some of our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
In commit 96151825 ("rcu: Enable RCU tracepoints by default to aid in debugging"), CONFIG_RCU_TRACE was made default y (if CONFIG_TREE_RCU=y, which it is for some of our configs). That in turn causes CONFIG_TREE_RCU_TRACE to be enabled, which selects CONFIG_DEBUG_FS. The end result is that CONFIG_DEBUG_FS is forced on, meaning we don't have to enable it in some of our configs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit e334cd69 ("Move CONFIG_DEVKMEM default to n") we no longer need to set CONFIG_DEVKMEM in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit f76be617 ("Make CONFIG_FHANDLE default y") we no longer need to set CONFIG_FHANDLE in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
In commit 73d8ef76 ("Input: mousedev - stop offering PS/2 to userspace by default") (Jan 2017), CONFIG_INPUT_MOUSEDEV was switched from default y to default n, with the explanation: Evdev interface has been available for many years and by now everyone is switched to using it, so let's stop offering /dev/input/mouseN and /dev/psaux by default. We had a number of configs which had it enabled, but going by the above explanation probably don't need it enabled anymore. So drop the last remnants of it from our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Since commit 401e4238 ("crypto: rng - Make DRBG the default RNG") we no longer need to set CONFIG_CRYPTO_ANSI_CPRNG in our defconfigs. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Update defconfigs for symbols that have moved around, without their value changing. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
This is purely cosmetic, but does look nicer IMHO: Before: task: c000000001453400 task.stack: c000000001c6c000 NIP: c000000000a0fbfc LR: c000000000a0fbf4 CTR: c000000000ba6220 REGS: c0000001fffef820 TRAP: 0300 Not tainted (4.13.0-rc6-gcc-6.3.1-00234-g423af27f7d81) MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 88088242 XER: 00000000 CFAR: c0000000000b3488 DAR: 0000000000000000 DSISR: 42000000 SOFTE: 0 After: task: c000000001453400 task.stack: c000000001c6c000 NIP: c000000000a0fbfc LR: c000000000a0fbf4 CTR: c000000000ba6220 REGS: c0000001fffef820 TRAP: 0300 Not tainted (4.13.0-rc6-gcc-6.3.1-00234-g423af27f7d81-dirty) MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 88088242 XER: 00000000 CFAR: c0000000000b34a4 DAR: 0000000000000000 DSISR: 42000000 SOFTE: 0 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Somehow we missed this when the pr_cont() changes went in. Fix CR/XER to go on the same line as MSR, as they have historically, eg: MSR: 8000000000009032 <SF,EE,ME,IR,DR,RI> CR: 4804408a XER: 20000000 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Just because it looks less gross. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
Although the MSR tells you what endian you're in it's possible that isn't the same endian the kernel was built for, and if that happens you're usually having a very bad day. So print a marker to make it 100% clear which endian the kernel was built for. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Michael Ellerman authored
When we oops we print a few markers for significant config options such as PREEMPT, SMP etc. Currently these appear on separate lines because we're not using pr_cont() properly. Fix it. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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LABBE Corentin authored
When building a random powerpc kernel I hit this build error: arch/powerpc/platforms/powernv/opal-imc.c:130:13: error : assignment discards « const » qualifier from pointer target type [-Werror=discarded-qualifiers] l_cpumask = cpumask_of_node(nid); ^ This happens because when CONFIG_NUMA=n cpumask_of_node() returns a const pointer. This patch simply adds const to l_cpumask to fix this issue. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> [mpe: Flesh out change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Rashmica Gupta authored
CONFIG_PPC_MEMTRACE must be set to use this feature. This can only be used on powernv platforms. Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com> [mpe: Update dates and kernel versions, mention size is in bytes] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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- 24 Aug, 2017 4 commits
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Rashmica Gupta authored
The hardware trace macro feature requires access to a chunk of real memory. This patch provides a debugfs interface to do this. By writing an integer containing the size of memory to be unplugged into /sys/kernel/debug/powerpc/memtrace/enable, the code will attempt to remove that much memory from the end of each NUMA node. This patch also adds additional debugsfs files for each node that allows the tracer to interact with the removed memory, as well as a trace file that allows userspace to read the generated trace. Note that this patch does not invoke the hardware trace macro, it only allows memory to be removed during runtime for the trace macro to utilise. Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com> [mpe: Minor formatting etc fixups] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Naveen N. Rao authored
This helper is used to detect if a uprobe'd function has returned through a setjmp/longjmp, rather than branching to the LR that was updated previously by us. This fixes a SIGSEGV that gets generated when programs use setjmp/longjmp with uretprobes. We use the arm64 model (arch/arm64/kernel/probes/uprobes.c: arch_uretprobe_is_alive()) for detecting when stack frames have been removed from under us. Reference: https://marc.info/?l=linux-kernel&m=143748610330073 commit 7b868e48 ("uprobes/x86: Reimplement arch_uretprobe_is_alive()") commit db087ef6 ("uprobes/x86: Make arch_uretprobe_is_alive(RP_CHECK_CALL) more clever") Tested with the test program from: https://sourceware.org/git/gitweb.cgi?p=systemtap.git;a=blob;f=testsuite/systemtap.base/bz5274.c;hb=HEAD And this script: $ cat test.sh #!/bin/bash perf probe -x ./bz5274 -a bz5274_main_return=main%return perf probe -x ./bz5274 -a bz5274_funca_return=funca%return perf probe -x ./bz5274 -a bz5274_funcb_return=funcb%return perf probe -x ./bz5274 -a bz5274_funcc_return=funcc%return perf probe -x ./bz5274 -a bz5274_funcd_return=funcd%return perf record -e 'probe_bz5274:*' -aR ./bz5274 Reported-by: Gustavo Luiz Duarte <gduarte@redhat.com> Reported-by: zsun@redhat.com Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Naveen N. Rao authored
We don't save/restore these across a trap, or with KPROBES_ON_FTRACE. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Cédric Le Goater authored
When called from xive_irq_startup(), the size of the cpumask can be larger than nr_cpu_ids. This can result in a WARN_ON such as: WARNING: CPU: 10 PID: 1 at ../arch/powerpc/sysdev/xive/common.c:476 xive_find_target_in_mask+0x110/0x2f0 ... NIP [c00000000008a310] xive_find_target_in_mask+0x110/0x2f0 LR [c00000000008a2e4] xive_find_target_in_mask+0xe4/0x2f0 Call Trace: xive_find_target_in_mask+0x74/0x2f0 (unreliable) xive_pick_irq_target.isra.1+0x200/0x230 xive_irq_startup+0x60/0x180 irq_startup+0x70/0xd0 __setup_irq+0x7bc/0x880 request_threaded_irq+0x14c/0x2c0 request_event_sources_irqs+0x100/0x180 __machine_initcall_pseries_init_ras_IRQ+0x104/0x134 do_one_initcall+0x68/0x1d0 kernel_init_freeable+0x290/0x374 kernel_init+0x24/0x170 ret_from_kernel_thread+0x5c/0x74 This happens because we're being called with our affinity mask set to irq_default_affinity. That in turn was populated using cpumask_setall(), which sets NR_CPUs worth of bits, not nr_cpu_ids worth. Finally cpumask_weight() will return > nr_cpu_ids when passed a mask which has > nr_cpu_ids bits set. Fix it by limiting the value returned by cpumask_weight(). Signed-off-by: Cédric Le Goater <clg@kaod.org> [mpe: Add change log details on actual cause] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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- 23 Aug, 2017 14 commits
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Nicholas Piggin authored
On modern CPUs the CTRL register is read-only except bit 63 which is the run latch control. This means it can be updated with a mtspr rather than mfspr/mtspr. To accomodate older CPUs (Cell at least), where there are other bits in the register, we still do a read/modify/write on pre 2.06 CPUs. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Update change log to mention 2.06 workaround] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
HVI interrupts have always used 0x500, so remove the dead branch. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
POWER9 host external interrupts use the h_virt_irq_common handler, so use that to replay them rather than using the hardware_interrupt_common handler. Both call do_IRQ, but using the correct handler reduces i-cache footprint. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
This results in smaller code, and fewer branches. This relies on the fact that both the 0xe80 and 0xa00 handlers call the same upper level code, namely doorbell_exception(). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Mention we rely on the implementation of the 0xe80/0xa00 handlers] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
Move the clearing of irq_happened bits into the condition where they were found to be set. This reduces instruction count slightly, and reduces stores into irq_happened. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
Places in the kernel where r13 is not the PACA pointer must have maskable interrupts disabled, so r13 does not have to be restored when returning from a soft-masked interrupt. We should never have interrupts soft disabled when we're in user space. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
MSR_EE is always enabled in SRR1 for masked interrupts, so we can use xor to clear it. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
Interrupts which do not require EE to be cleared can all be tested with a single bitwise test. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Benjamin Herrenschmidt authored
It's too big to be inline, there is no reason to keep it that way. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [mpe: Rework to incorporate the comment changes via fixes branch] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Benjamin Herrenschmidt authored
Instead of comparing the whole CPU mask every time, let's keep a counter of how many bits are set in the mask. Thus testing for a local mm only requires testing if that counter is 1 and the current CPU bit is set in the mask. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Benjamin Herrenschmidt authored
We open-code testing for the mm being local to the current CPU in a few places. Use our existing helper instead. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Benjamin Herrenschmidt authored
It calls switch_mm() which already does the irq save/restore these days. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Benjamin Herrenschmidt authored
Makes switch_mm_irqs_off() a bit more readable Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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