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Currently if we take an oops caused by an 0x380 or 0x480 exception, we get a
print which assumes SLB problems. With radix, these vectors have different
meanings.
This patch updates the oops message to reflect these different meanings.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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An externally triggered system reset (e.g., via QEMU nmi command, or pseries
reset button) can cause system reset interrupts on all CPUs. In case this causes
xmon to be entered, it is undesirable for the primary (first) CPU into xmon to
trigger an NMI IPI to others, because this may cause a nested system reset
interrupt.
So spin for a time waiting for secondaries to join xmon before performing the
NMI IPI, similarly to what the crash dump code does.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Only do it when we come in from system reset, not via sysrq etc.]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The system reset interrupt is used for crash/debug situations, so it is
desirable to have as little impact on the normal state of the system as
possible.
Currently it uses the current kernel stack to process the exception.
This stores into the stack which may be involved with the crash. The
stack pointer may be corrupted, or it may have overflowed.
Avoid or minimise these problems by creating a dedicated NMI stack for
the system reset interrupt to use.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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In preparation for using a dedicated stack for system reset interrupts,
prevent a nested system reset from recovering, in order to simplify
code that is called in crash/debug path. This allows a system reset
interrupt to just use the base stack pointer.
Keep an in_nmi nesting counter similarly to the in_mce counter. Consider
the interrrupt non-recoverable if it is taken inside another system
reset.
Interrupt nesting could be allowed similarly to MCE, but system reset
is a special case that's not for normal operation, so simplicity wins
until there is requirement for nested system reset interrupts.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Currently the code that dumps SLB entries uses a double-nested if. This
means the actual dumping logic is a bit squashed. Deindent it by using
continue.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This merges the arch part of the XIVE support, leaving the final commit
with the KVM specific pieces dangling on the branch for Paul to merge
via the kvm-ppc tree.
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powerpc_debugfs_root is the dentry representing the root of the
"powerpc" directory tree in debugfs.
Currently it sits in asm/debug.h, a long with some other things that
have "debug" in the name, but are otherwise unrelated.
Pull it out into a separate header, which also includes linux/debugfs.h,
and convert all the users to include debugfs.h instead of debug.h.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The XIVE interrupt controller is the new interrupt controller
found in POWER9. It supports advanced virtualization capabilities
among other things.
Currently we use a set of firmware calls that simulate the old
"XICS" interrupt controller but this is fairly inefficient.
This adds the framework for using XIVE along with a native
backend which OPAL for configuration. Later, a backend allowing
the use in a KVM or PowerVM guest will also be provided.
This disables some fast path for interrupts in KVM when XIVE is
enabled as these rely on the firmware emulation code which is no
longer available when the XIVE is used natively by Linux.
A latter patch will make KVM also directly exploit the XIVE, thus
recovering the lost performance (and more).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Fixup pr_xxx("XIVE:"...), don't split pr_xxx() strings,
tweak Kconfig so XIVE_NATIVE selects XIVE and depends on POWERNV,
fix build errors when SMP=n, fold in fixes from Ben:
Don't call cpu_online() on an invalid CPU number
Fix irq target selection returning out of bounds cpu#
Extra sanity checks on cpu numbers
]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Currently the xmon debugger is set only via kernel boot command-line.
It's disabled by default, and can be enabled with "xmon=on" on the
command-line. Also, xmon may be accessed via sysrq mechanism.
But we cannot enable/disable xmon in runtime, it needs kernel reload.
This patch introduces a debugfs entry for xmon, allowing user to query
its current state and change it if desired. Basically, the "xmon" file
to read from/write to is under the debugfs mount point, on powerpc
directory. It's a simple attribute, value 0 meaning xmon is disabled
and value 1 the opposite. Writing these states to the file will take
immediate effect in the debugger.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The xmon parameter nobt was added long time ago, by commit 26c8af5f01df
("[POWERPC] print backtrace when entering xmon"). The problem that time
was that during a crash in a machine with USB keyboard, xmon wouldn't
respond to commands from the keyboard, so printing the backtrace wouldn't
be possible.
Idea then was to show automatically the backtrace on xmon crash for the
first time it's invoked (if it recovers, next time xmon won't show
backtrace automatically). The nobt parameter was added _only_ to prevent
this automatic trace show. Seems long time ago USB keyboards didn't work
that well!
We don't need this parameter anymore, the feature of auto showing the
backtrace is interesting (imagine a case of auto-reboot script),
so this patch extends the functionality, by always showing the backtrace
automatically when xmon is invoked; it removes the nobt parameter too.
Also, this patch fixes __initdata placement on xmon_early and replaces
__initcall() with modern device_initcall() on sysrq handler.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Once xmon is triggered by sysrq-x, it is enabled always afterwards even
if it is disabled during boot. This will cause a system reset interrupt
fail to dump. So keep xmon in its original state after exit.
We have several ways to set xmon on or off.
1) by a build config CONFIG_XMON_DEFAULT.
2) by a boot cmdline with xmon or xmon=early or xmon=on to enable xmon
and xmon=off to disable xmon. This value will override that in step 1.
3) by a debugfs interface, as proposed in this patchset.
And this value can override those in step 1 and 2.
Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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We are going to split <linux/sched/signal.h> out of <linux/sched.h>, which
will have to be picked up from other headers and a couple of .c files.
Create a trivial placeholder <linux/sched/signal.h> file that just
maps to <linux/sched.h> to make this patch obviously correct and
bisectable.
Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Pull more powerpc updates from Michael Ellerman:
"Highlights include:
- an update of the disassembly code used by xmon to the latest
versions in binutils. We've received permission from all the
authors of the relevant binutils changes to relicense their changes
to the relevant files from GPLv3 to GPLv2, for inclusion in Linux.
Thanks to Peter Bergner for doing the leg work to get permission
from everyone.
- addition of the "architected" Power9 CPU table entry, allowing us
to boot in Power9 architected mode under a hypervisor.
- updates to the Power9 PMU code.
- implementation of clear_bit_unlock_is_negative_byte() to optimise
unlock_page().
- Freescale updates from Scott: "Highlights include 8xx breakpoints
and perf, t1042rdb display support, and board updates."
Thanks to:
Al Viro, Andrew Donnellan, Aneesh Kumar K.V, Balbir Singh, Douglas
Miller, Frédéric Weisbecker, Gavin Shan, Madhavan Srinivasan,
Michael Roth, Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Peter
Bergner, Paul E. McKenney, Rashmica Gupta, Russell Currey, Sahil
Mehta, Stewart Smith"
* tag 'powerpc-4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (48 commits)
powerpc: Remove leftover cputime_to_nsecs call causing build error
powerpc/mm/hash: Always clear UPRT and Host Radix bits when setting up CPU
powerpc/optprobes: Fix TOC handling in optprobes trampoline
powerpc/pseries: Advertise Hot Plug Event support to firmware
cxl: fix nested locking hang during EEH hotplug
powerpc/xmon: Dump memory in CPU endian format
powerpc/pseries: Revert 'Auto-online hotplugged memory'
powerpc/powernv: Make PCI non-optional
powerpc/64: Implement clear_bit_unlock_is_negative_byte()
powerpc/powernv: Remove unused variable in pnv_pci_sriov_disable()
powerpc/kernel: Remove error message in pcibios_setup_phb_resources()
powerpc/mm: Fix typo in set_pte_at()
pci/hotplug/pnv-php: Disable MSI and PCI device properly
pci/hotplug/pnv-php: Disable surprise hotplug capability on conflicts
pci/hotplug/pnv-php: Remove WARN_ON() in pnv_php_put_slot()
powerpc: Add POWER9 architected mode to cputable
powerpc/perf: use is_kernel_addr macro in perf_get_misc_flags()
powerpc/perf: Avoid FAB_*_MATCH checks for power9
powerpc/perf: Add restrictions to PMC5 in power9 DD1
powerpc/perf: Use Instruction Counter value
...
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Fix typos and add the following to the scripts/spelling.txt:
an user||a user
an userspace||a userspace
I also added "userspace" to the list since it is a common word in Linux.
I found some instances for "an userfaultfd", but I did not add it to the
list. I felt it is endless to find words that start with "user" such as
"userland" etc., so must draw a line somewhere.
Link: http://lkml.kernel.org/r/1481573103-11329-4-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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show_mem() allows to filter out node specific data which is irrelevant
to the allocation request via SHOW_MEM_FILTER_NODES. The filtering is
done in skip_free_areas_node which skips all nodes which are not in the
mems_allowed of the current process. This works most of the time as
expected because the nodemask shouldn't be outside of the allocating
task but there are some exceptions. E.g. memory hotplug might want to
request allocations from outside of the allowed nodes (see
new_node_page).
Get rid of this hardcoded behavior and push the allocation mask down the
show_mem path and use it instead of cpuset_current_mems_allowed. NULL
nodemask is interpreted as cpuset_current_mems_allowed.
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/20170117091543.25850-5-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull powerpc updates from Michael Ellerman:
"Highlights include:
- Support for direct mapped LPC on POWER9, giving Linux direct access
to devices that may be on there such as a UART.
- Memory hotplug support for the Power9 Radix MMU.
- Add new AUX vectors describing the processor's cache geometry, to
be used by glibc.
- The ability for a guest to ask the hypervisor to resize the guest's
hash table, and in addition support for doing so automatically when
memory is hotplugged into/out-of the guest. This allows the hash
table to be sized based on the current memory usage of the guest,
rather than the maximum possible memory usage.
- Implementation of optprobes (kprobe optimisation) for powerpc.
In addition there's the topic branch shared with the KVM tree, which
includes support for guests to use the Radix MMU on Power9.
Thanks to:
Alistair Popple, Andrew Donnellan, Aneesh Kumar K.V, Anju T, Anton
Blanchard, Benjamin Herrenschmidt, Chris Packham, Daniel Axtens,
Daniel Borkmann, David Gibson, Finn Thain, Gautham R. Shenoy, Gavin
Shan, Greg Kurz, Joel Stanley, John Allen, Madhavan Srinivasan,
Mahesh Salgaonkar, Markus Elfring, Michael Neuling, Nathan Fontenot,
Naveen N. Rao, Nicholas Piggin, Paul Mackerras, Ravi Bangoria, Reza
Arbab, Shailendra Singh, Vaibhav Jain, Wei Yongjun"
* tag 'powerpc-4.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (129 commits)
powerpc/mm/radix: Skip ptesync in pte update helpers
powerpc/mm/radix: Use ptep_get_and_clear_full when clearing pte for full mm
powerpc/mm/radix: Update pte update sequence for pte clear case
powerpc/mm: Update PROTFAULT handling in the page fault path
powerpc/xmon: Fix data-breakpoint
powerpc/mm: Fix build break with BOOK3S_64=n and MEMORY_HOTPLUG=y
powerpc/mm: Fix build break when CMA=n && SPAPR_TCE_IOMMU=y
powerpc/mm: Fix build break with RADIX=y & HUGETLBFS=n
powerpc/pseries: Fix typo in parameter description
powerpc/kprobes: Remove kprobe_exceptions_notify()
kprobes: Introduce weak variant of kprobe_exceptions_notify()
powerpc/ftrace: Fix confusing help text for DISABLE_MPROFILE_KERNEL
powerpc/powernv: Fix opal_exit tracepoint opcode
powerpc: Add a prototype for mcount() so it can be versioned
powerpc: Drop GPL from of_node_to_nid() export to match other arches
powerpc/kprobes: Optimize kprobe in kretprobe_trampoline()
powerpc/kprobes: Implement Optprobes
powerpc/kprobes: Fixes for kprobe_lookup_name() on BE
powerpc: Add helper to check if offset is within relative branch range
powerpc/bpf: Introduce __PPC_SH64()
...
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Extend the dump command to allow display of 2, 4, and 8 byte words in
CPU endian format. Also adds dump command for "1 byte values" for the
sake of symmetry. New commands are:
d1 dump 1 byte values
d2 dump 2 byte values
d4 dump 4 byte values
d8 dump 8 byte values
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
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After updating ppc-dis.c, ppc-opc.c and ppc.h the following changes were
made to enable compilation and working of xmon:
1. Remove all disassembler_info
2. Use xmon's printf/print_address to output data and addresses
respectively.
3. All bfd_* types and casts have been removed.
4. Optimizations related to opcd_indices have been removed.
5. The dialect is set based on cpu features.
6. PPC_OPCODE_CLASSIC is no longer supported in the new
disassembler.
7. VLE opcode parsing and printing has been stripped.
8. Coding style conventions used for those routines has
been retained and it does not match our CodingStyle.
9. The highest supported dialect is POWER9.
10. Defined ATTRIBUTE_UNUSED in ppc-dis.c.
11. Defined _(x) in ppc-dis.c.
Finally, we remove the dependency on BROKEN so that XMON_DISASSEMBLY can
be enabled again.
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The following commit-ids from the binutils project were applied on the
xmon branch and relicensed with the permission of the authors under
GPLv2 for the following files:
ppc-opc.c
ppc-dis.c
ppc.h
Working off of binutils commit 65b650b4c746 we have now moved up to
binutils commit a5721ba270dd.
Some commit logs have been taken verbatim, some are summarized for ease
of understanding.
Here is a summary of the commits:
33e8d5ac613d PPC7450 New. (powerpc_opcodes): Use it in dcba.
c3d65c1ced61 New opcodes and mask
8dbcd839b1bb Instruction Sorting
91eb7075e370 (powerpc_opcodes): Fix the first two operands of dquaiq.
548b1dcfcbab ppc-opc.c (powerpc_opcodes): Remove the dcffix and dcffix.
930bb4cfae30 Support optional L form mtmsr.
de866fccd87d (powerpc_opcodes): Order and format.
19a6653ce8c6 ppc e500mc support
fa452fa6833c (ppc_cpu_t): New typedef.
c8187e1509b2 (parse_cpu): Handle -m464.
081ba1b3c08b Define. (PPC_OPERAND_FSL, PPC_OPERAND_FCR, PPC_OPERAND_UDI)
9b4e57660d38 Rename altivec_or_spe to retain_flags. Handle -mvsx and -mpower7.
899d85beadd0 (powerpc_opcodes): Enable rfci, mfpmr, mtpmr for e300.
e1c93c699b7d (extract_sprg): Correct operand range check.
2f3bb96af796 (powerpc_init_dialect): Do not set PPC_OPCODE_BOOKE
1cb0a7674666 (ppc_setup_opcodes): Remove PPC_OPCODE_NOPOWER4 test
21169fcfadfa (print_insn_powerpc): Skip insn if it is deprecated
80890a619b85 ("dcbt", "dcbtst")
0e55be1624c2 ("lfdepx", "stfdepx")
066be9f7bd8e (parse_cpu): Extend -mpower7 to accept power7 and isel instructions.
c72ab5f2c55d (powerpc_opcodes): Reorder the opcode table so that instructions
69fe9ce501f5 (ppc_parse_cpu): New function. (powerpc_init_dialect)
e401b04ca7cd (powerpc_opcodes) <"dcbzl">: Merge the POWER4 and E500MC entries.
70dc4e324b9a (powerpc_init_dialect): Do not choose a default dialect due to -many/-Many.
858d7a6db20b (powerpc_opcodes) <"tlbilxlpid", "tlbilxpid", "tlbilxva", "tlbilx"
bdc7fcfe59f1 (powerpc_macros <extrdi>): Allow n+b of 64
e0d602ecffb0 (md_show_usage): Document -mpcca2
b961e85b6ebe (ppc_cpu_t): Typedef to uint64_t
8765b5569284 (powerpc_opcodes): Remove support for the the "lxsdux", "lxvd2ux"
634b50f2a623 Rename "ppca2" to "a2"
9fe54b1ca1c0 (md_show_usage): Document -m476
0dc9305793c8 Add bfd_mach_ppc_e500mc64
ce3d2015b21b Define. bfd/ * archures.c (bfd_mach_ppc_titan)
cdc51b0748c4 Add -mpwr4, -mpwr5, -mpwr5x, -mpwr6 and -mpwr7
63d0fa4e9e57 Add PPC_OPCODE_E500MC for "e500mc64"
cee62821d472 New Define. ("dccci"): Enable for PPCA2
85d4ac0b3c0b Correct wclr encoding.
51b5d4a8c5e5 (powerpc_opcodes): Enable divdeu, devweu, divde, divwe, divdeuo
e01d869a3be2 (md_assemble): Emit APUinfo section for PPC_OPCODE_E500
09a8ad8d8f56 (powerpc_opcodes): Revert deprecation of mfocrf, mtcrf and mtocrf on EFS.
f2bae120dcef (PPC_OPCODE_COMMON): Expand comment.
81a0b7e2ae09 (PPCPWR2): Add PPC_OPCODE_COMMON. (powerpc_opcodes): Add "subc"
bdc70b4a03fd (PPC_OPCODE_32, PPC_OPCODE_BOOKE64, PPC_OPCODE_CLASSIC)
7102e95e4943 (ppc_set_cpu): Cast PPC_OPCODE_xxx to ppc_cpu_t before inverting
f383de6633cb (powerpc_opcodes) [lswx,lswi,stswx,stswi]: Deprecate on E500 and E500MC
6b069ee70de3 Remove PPC_OPCODE_PPCPS
2f7f77101279 (powerpc_opcodes): Enable icswx for POWER7
989993d80a97 (insert_nbi, insert_rbx, FRAp, FRBp, FRSp, FRTp, NBI, RAX, RBX)
a08fc94222d1 <drrndq, drrndq., dtstexq, dctqpq, dctqpq., dctfixq, dctfixq.
8ebac3aae962 (ISA_V2): Define and use for relevant BO field tests
aea77599d0db Add PPC_OPCODE_ALTIVEC2, PPC_OPCODE_E6500, PPC_OPCODE_TMR
b240011aba98 (disassemble_init_for_target): Handle ppc init.
d668828207c2 (powerpc_opcd_indices): Bump array size
b9c361e0ad33 Add support for PowerPC VLE.
e1dad58d73dc (has_tls_reloc, has_tls_get_addr_call, has_vle_insns, is_ppc_vle)
df7b86aa4cb6 Add check that sysdep.h has been included before
98c76446ea6b (extract_sprg): Use ALLOW8_SPRG to include VLE.
a4ebc835cbcb (powerpc_macros): Add entries for e_extlwi to e_clrlslwi
94caa966375d (has_vle_insns, is_ppc_vle): Delete
c7a8dbf91f37 Change RA to RA0
d908c8af5a1d Add necessary casts for printing integer values
03edbe3bfb93 Add/remove PPCVLE for some 32-bit insns
9f6a6cc022e1 <xnop, yield, mdoio, mdoom>: New extended mnemonics
588925d06545 <RSQ, RTQ>: Use PPC_OPERAND_GPR
8baf7b78b5d9 <"lswx">: Use RAX for the second and RBX for the third operand
e67ed0e885d6 Changed opcode for vabsdub, vabsduh, vabsduw, mviwsplt
fb048c26f19f (UIMM4, UIMM3, UIMM2, VXVA_MASK, VXVB_MASK, VXVAVB_MASK, VXVDVA_MASK
382c72e90441 (VXASHB_MASK): New define
c7a5aa9c64fc (ppc_opts) <altivec>: Use PPC_OPCODE_ALTIVEC2
ab4437c3224f <vcfpsxws>: Fix opcode spelling
62082a42b9cd "lfdp" and "stfdp" use DS offset.
776fc41826bb (ppc_parse_cpu): Update prototype
943d398f4c52 (insert_sci8, extract_sci8): Rewrite.
5817ffd1f81c New define (PPC_OPCODE_HTM/POWER8)
9f0682fe89d9 (extract_vlesi): Properly sign extend
c0637f3af686 (powerpc_init_dialect): Set default dialect to power8.
58ae08f29af8 (powerpc_opcodes): Add tdui, twui, tdu, twu, tui, tu
4f6ffcd38d90 (powerpc_init_dialect): Use ppc_parse_cpu() to set dialect
4b95cf5c0c75 Update copyright years
a47622ac1bad Allow both signed and unsigned fields in PowerPC cmpli insn
12e87fac5c76 ppc: enable msgclr and msgsnd on Power8
8514e4db84cc Don't deprecate powerpc mftb insn
db76a70026ab Power4 should treat mftb as extended mfspr mnemonic
b90efa5b79ac ChangeLog rotatation and copyright year update
c4e676f19656 powerpc: Add slbfee. instruction
27c49e9a8fc0 powerpc: Only initialise opcode indices once
4fff86c517ab DCBT_EO): New define
4bc0608a8b69 Fix some PPC assembler errors
dc302c00611b Add hwsync extended mnemonic
99a2c5612124 Remove unused MTMSRD_L macro and re-add accidentally deleted comment
11a0cf2ec0ed Allow for optional operands with non-zero default values
7b9341139a69 PPC sync instruction accepts invalid and incompatible operands
ef5a96d564a2 Remove ppc860, ppc750cl, ppc7450 insns from common ppc
43e65147c07b Remove trailing spaces in opcodes
6dca4fd141fd Add dscr and ctrl SPR mnemonics
b6518b387185 Fix compile time warnings generated when compiling with clang
36f7a9411dcd Patches for illegal ppc 500 instructions
a680de9a980e Add assembler, disassembler and linker support for power9
dd2887fc3de4 Reorder some power9 insns
b817670b52b7 Enable 2 operand form of powerpc mfcr with -many
6f2750feaf28 Copyright update for binutils
afa8d4054b8e Delete opcodes that have been removed from ISA 3.0
1178da445ad5 Accept valid one byte signed and unsigned values for the IMM8 operand
e43de63c8fd1 Fix powerpc subis range
514e58b72633 Correct "Fix powerpc subis range"
19dfcc89e8d9 Add support for new POWER ISA 3.0 instructions
1fe0971e41a4 add more extern C
026122a67044 Re-add support for lbarx, lharx, stbcx. and sthcx. insns back to the E6500 cpu
14b57c7c6a53 PowerPC VLE
6fd3a02da554 Add support for yet some more new ISA 3.0 instructions
dfdaec14b0db Fix some PowerPC VLE BFD issues and add some PowerPC VLE instructions
fd486b633e87 Modify POWER9 support to match final ISA 3.0 documentation
a5721ba270dd Disallow 3-operand cmp[l][i] for ppc64
This updates the disassembly capabilities to add support for newer
processors.
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
[mpe: Reformat commit list for brevity]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Upgrade ppc-opc.c, ppc-dis.c and ppc.h to the versions belonging to the
following binutils commit:
65b650b4c7463f4508bed523c24ab0031a5ae5cd
* ppc-dis.c (print_insn_powerpc): Don't skip all operands after
setting skip_optional.
That is the last version of those files that were licensed under GPLv2.
This leaves the code in a state that does not compile, because the
binutils code needs to be tweaked to work in the kernel. We don't fix
that in this commit, because we want to import more binutils changes in
subsequent commits. So for now we mark XMON_DISASSEMBLY as BROKEN, so it
can't be built.
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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That in order to gather all cputime accumulation to the same place.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1483636310-6557-7-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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In order to prepare for CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y to delay
cputime accounting to the tick, provide finegrained accumulators to
powerpc in order to store the cputime until flushing.
While at it, normalize the name of several fields according to common
cputime naming.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1483636310-6557-6-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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There is a nice interface for asking ftrace to dump all its tracing
buffers. The only down side for use in xmon is that it uses printk.
Depending on circumstances printk may not work when in xmon, but it also
may, so add a 'dt' command which dumps the ftrace buffers, and add a
note to the help to mentiont that it uses printk.
Calling this routine also disables tracing, which is problematic if you
return from xmon and expect the system to keep operating normally. So
after we do the dump turn tracing back on.
Both functions already have nop versions defined for when ftrace is not
enabled, so we don't need any extra #ifdefs.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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In commit 31cdd0c39c75 ("powerpc/xmon: Fix SPR read/write commands and
add command to dump SPRs") I added two uses of the "ld" instruction in
spr_access.S. "ld" is a 64-bit instruction, so shouldn't be used on
32-bit CPUs.
Replace it with PPC_LL which is a macro that gives us either "ld" or
"lwz" depending on whether we're 64 or 32-bit.
Fixes: 31cdd0c39c75 ("powerpc/xmon: Fix SPR read/write commands and add command to dump SPRs")
Cc: stable@vger.kernel.org # v4.7+
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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We plan to use jump label for cpu_has_feature(). In order to implement
this we need to include the linux/jump_label.h in asm/cputable.h.
Unfortunately if we do that it leads to an include loop. The root of the
problem seems to be that reg.h needs cputable.h (for CPU_FTRs), and then
cputable.h via jump_label.h eventually pulls in hw_irq.h which needs
reg.h (for MSR_EE).
So move cpu_has_feature() to a separate file on its own.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Rename to cpu_has_feature.h and flesh out change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Freescale updates from Scott:
"Highlights include more 8xx optimizations, device tree updates,
and MVME7100 support."
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Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Purely to make it pleasing to the eye.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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None of these are used, or have been since we merged ppc & ppc64.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This patch provides VIRT_CPU_ACCOUTING to PPC32 architecture.
PPC32 doesn't have the PACA structure, so we use the task_info
structure to store the accounting data.
In order to reuse on PPC32 the PPC64 functions, all u64 data has
been replaced by 'unsigned long' so that it is u32 on PPC32 and
u64 on PPC64
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
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xmon has commands for reading and writing SPRs, but they don't work
currently for several reasons. They attempt to synthesize a small
function containing an mfspr or mtspr instruction and call it. However,
the instructions are on the stack, which is usually not executable.
Also, for 64-bit we set up a procedure descriptor, which is fine for the
big-endian ABIv1, but not correct for ABIv2. Finally, the code uses the
infrastructure for catching memory errors, but that only catches data
storage interrupts and machine check interrupts, but a failed
mfspr/mtspr can generate a program interrupt or a hypervisor emulation
assist interrupt, or be a no-op.
Instead of trying to synthesize a function on the fly, this adds two new
functions, xmon_mfspr() and xmon_mtspr(), which take an SPR number as an
argument and read or write the SPR. Because there is no Power ISA
instruction which takes an SPR number in a register, we have to generate
one of each possible mfspr and mtspr instruction, for all 1024 possible
SPRs. Thus we get just over 8k bytes of code for each of xmon_mfspr()
and xmon_mtspr(). However, this 16kB of code pales in comparison to the
> 130kB of PPC opcode tables used by the xmon disassembler.
To catch interrupts caused by the mfspr/mtspr instructions, we add a new
'catch_spr_faults' flag. If an interrupt occurs while it is set, we come
back into xmon() via program_check_interrupt(), _exception() and die(),
see that catch_spr_faults is set and do a longjmp to bus_error_jmp, back
into read_spr() or write_spr().
This adds a couple of other nice features: first, a "Sa" command that
attempts to read and print out the value of all 1024 SPRs. If any mfspr
instruction acts as a no-op, then the SPR is not implemented and not
printed.
Secondly, the Sr and Sw commands detect when an SPR is not
implemented (i.e. mfspr is a no-op) and print a message to that effect
rather than printing a bogus value.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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We also use MMU_FTR_RADIX to branch out from code path specific to
hash.
No functionality change.
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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Add 'P' command with optional task_struct address to dump all/one task's
information: task pointer, kernel stack pointer, PID, PPID, state
(interpreted), CPU where (last) running, and command.
Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Add the 'do' command to dump the OPAL msglog in xmon.
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
[mpe: Reduce the amount of ifdefery required]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This hooks up UBSAN support for PowerPC.
So far it's found some interesting cases where we don't properly sanitise
input to shifts, including one in our futex handling. Nothing critical,
but interesting and worth fixing.
[valentinrothberg@gmail.com: arch/powerpc/Kconfig: fix typo in select statement]
Signed-off-by: Daniel Axtens <dja@axtens.net>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Avoid open coding the logic by using rtas_call_unlocked().
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Currently if you are in xmon without an oops etc. to view the kernel
version you have to type "d $linux_banner" - not necessarily obvious. As
this is useful information, append to the output of "e" command.
Example output:
$mon> e
cpu 0x1: Vector: 0 at [c0000000f879ba80]
pc: c000000000081718: sysrq_handle_xmon+0x68/0x80
lr: c000000000081718: sysrq_handle_xmon+0x68/0x80
sp: c0000000f879bbe0
msr: 8000000000009033
current = 0xc0000000f604d5c0
paca = 0xc00000000fdc0480 softe: 0 irq_happened: 0x01
pid = 2467, comm = bash
Linux version 4.4.0-rc2-00008-gc51af91c3ab3-dirty (rashmica@circle) (gcc
version 5.1.1 20150629 (GCC) ) #45 SMP Wed Nov 25 10:25:12 AEDT 2015
Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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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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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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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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The value of 'valid' is always zero when 'esid' is zero, and if 'esid'
is non-zero then the value of 'valid' is irrelevant because we are using
logical or in the if expression.
In fact 'valid' can be dropped completely from dump_segments() by
simply doing the check with SLB_ESID_V directly in the if.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
[mpe: Rewrite change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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break; break; isn't useful.
Remove one.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Pull powerpc updates from Michael Ellerman:
- Update of all defconfigs
- Addition of a bunch of config options to modernise our defconfigs
- Some PS3 updates from Geoff
- Optimised memcmp for 64 bit from Anton
- Fix for kprobes that allows 'perf probe' to work from Naveen
- Several cxl updates from Ian & Ryan
- Expanded support for the '24x7' PMU from Cody & Sukadev
- Freescale updates from Scott:
"Highlights include 8xx optimizations, some more work on datapath
device tree content, e300 machine check support, t1040 corenet
error reporting, and various cleanups and fixes"
* tag 'powerpc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (102 commits)
cxl: Add missing return statement after handling AFU errror
cxl: Fail AFU initialisation if an invalid configuration record is found
cxl: Export optional AFU configuration record in sysfs
powerpc/mm: Warn on flushing tlb page in kernel context
powerpc/powernv: Add OPAL soft-poweroff routine
powerpc/perf/hv-24x7: Document sysfs event description entries
powerpc/perf/hv-gpci: add the remaining gpci requests
powerpc/perf/{hv-gpci, hv-common}: generate requests with counters annotated
powerpc/perf/hv-24x7: parse catalog and populate sysfs with events
perf: define EVENT_DEFINE_RANGE_FORMAT_LITE helper
perf: add PMU_EVENT_ATTR_STRING() helper
perf: provide sysfs_show for struct perf_pmu_events_attr
powerpc/kernel: Avoid initializing device-tree pointer twice
powerpc: Remove old compile time disabled syscall tracing code
powerpc/kernel: Make syscall_exit a local label
cxl: Fix device_node reference counting
powerpc/mm: bail out early when flushing TLB page
powerpc: defconfigs: add MTD_SPI_NOR (new dependency for M25P80)
perf/powerpc: reset event hw state when adding it to the PMU
powerpc/qe: Use strlcpy()
...
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The commit 3b8a3c010969 ("powerpc/pseries: Fix endiannes issue in RTAS
call from xmon") was fixing an endianness issue in the call made from
xmon to RTAS.
However, as Michael Ellerman noticed, this fix was not complete, the
token value was not byte swapped. This lead to call an unexpected and
most of the time unexisting RTAS function, which is silently ignored by
RTAS.
This fix addresses this hole.
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: stable@vger.kernel.org
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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isxdigit() macro definition is the same.
isalnum() from linux/ctype.h will accept additional latin non-ASCII
characters. This is harmless since this macro is used in scanhex() which
parses user input.
isspace() from linux/ctype.h will accept vertical tab and form feed but
not NULL. The use of this macro is modified to accept NULL as
well. Additional characters are harmless since this macro is also only
used in scanhex().
Signed-off-by: Vincent Bernat <vincent@bernat.im>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Pull powerpc updates from Michael Ellerman:
"Some nice cleanups like removing bootmem, and removal of
__get_cpu_var().
There is one patch to mm/gup.c. This is the generic GUP
implementation, but is only used by us and arm(64). We have an ack
from Steve Capper, and although we didn't get an ack from Andrew he
told us to take the patch through the powerpc tree.
There's one cxl patch. This is in drivers/misc, but Greg said he was
happy for us to manage fixes for it.
There is an infrastructure patch to support an IPMI driver for OPAL.
There is also an RTC driver for OPAL. We weren't able to get any
response from the RTC maintainer, Alessandro Zummo, so in the end we
just merged the driver.
The usual batch of Freescale updates from Scott"
* tag 'powerpc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (101 commits)
powerpc/powernv: Return to cpu offline loop when finished in KVM guest
powerpc/book3s: Fix partial invalidation of TLBs in MCE code.
powerpc/mm: don't do tlbie for updatepp request with NO HPTE fault
powerpc/xmon: Cleanup the breakpoint flags
powerpc/xmon: Enable HW instruction breakpoint on POWER8
powerpc/mm/thp: Use tlbiel if possible
powerpc/mm/thp: Remove code duplication
powerpc/mm/hugetlb: Sanity check gigantic hugepage count
powerpc/oprofile: Disable pagefaults during user stack read
powerpc/mm: Check for matching hpte without taking hpte lock
powerpc: Drop useless warning in eeh_init()
powerpc/powernv: Cleanup unused MCE definitions/declarations.
powerpc/eeh: Dump PHB diag-data early
powerpc/eeh: Recover EEH error on ownership change for BCM5719
powerpc/eeh: Set EEH_PE_RESET on PE reset
powerpc/eeh: Refactor eeh_reset_pe()
powerpc: Remove more traces of bootmem
powerpc/pseries: Initialise nvram_pstore_info's buf_lock
cxl: Name interrupts in /proc/interrupt
cxl: Return error to PSL if IRQ demultiplexing fails & print clearer warning
...
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Michael Neuling
Nicholas Piggin
Michael Ellerman
Benjamin Herrenschmidt
Guilherme G. Piccoli
Pan Xinhui
Ingo Molnar
Linus Torvalds
Masahiro Yamada
Michal Hocko
Douglas Miller
Balbir Singh
Madhavan Srinivasan
Frederic Weisbecker
Kevin Hao
Christophe Leroy
Paul Mackerras
Aneesh Kumar K.V
Andrew Donnellan
Daniel Axtens
Rashmica Gupta
Sam bobroff
Anshuman Khandual
Joe Perches
Laurent Dufour
Vincent Bernat