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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
Pull livepatching updates from Jiri Kosina:
- removal of dead code (Kamalesh Babulal)
- documentation update (Miroslav Benes)
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
livepatch: doc: remove the limitation for schedule() patching
powerpc/livepatch: Remove klp_write_module_reloc() stub
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"The main changes in this (fairly busy) cycle were:
- There was a class of scheduler bugs related to forgetting to update
the rq-clock timestamp which can cause weird and hard to debug
problems, so there's a new debug facility for this: which uncovered
a whole lot of bugs which convinced us that we want to keep the
debug facility.
(Peter Zijlstra, Matt Fleming)
- Various cputime related updates: eliminate cputime and use u64
nanoseconds directly, simplify and improve the arch interfaces,
implement delayed accounting more widely, etc. - (Frederic
Weisbecker)
- Move code around for better structure plus cleanups (Ingo Molnar)
- Move IO schedule accounting deeper into the scheduler plus related
changes to improve the situation (Tejun Heo)
- ... plus a round of sched/rt and sched/deadline fixes, plus other
fixes, updats and cleanups"
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (85 commits)
sched/core: Remove unlikely() annotation from sched_move_task()
sched/autogroup: Rename auto_group.[ch] to autogroup.[ch]
sched/topology: Split out scheduler topology code from core.c into topology.c
sched/core: Remove unnecessary #include headers
sched/rq_clock: Consolidate the ordering of the rq_clock methods
delayacct: Include <uapi/linux/taskstats.h>
sched/core: Clean up comments
sched/rt: Show the 'sched_rr_timeslice' SCHED_RR timeslice tuning knob in milliseconds
sched/clock: Add dummy clear_sched_clock_stable() stub function
sched/cputime: Remove generic asm headers
sched/cputime: Remove unused nsec_to_cputime()
s390, sched/cputime: Remove unused cputime definitions
powerpc, sched/cputime: Remove unused cputime definitions
s390, sched/cputime: Make arch_cpu_idle_time() to return nsecs
ia64, sched/cputime: Remove unused cputime definitions
ia64: Convert vtime to use nsec units directly
ia64, sched/cputime: Move the nsecs based cputime headers to the last arch using it
sched/cputime: Remove jiffies based cputime
sched/cputime, vtime: Return nsecs instead of cputime_t to account
sched/cputime: Complete nsec conversion of tick based accounting
...
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Pull EDAC updates from Borislav Petkov:
- Make amd64_edac still load on a machine with unpopulated nodes +
cleanups (Yazen Ghannam)
- Expose per-DIMM error counts in sysfs (Aaron Miller)
- Add T2080 l2-cache support to mpc85xx (Chris Packham)
- Random other small improvements/cleanups/fixlets
* tag 'edac_for_4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
EDAC, mce_amd: Print IPID and Syndrome on a separate line
EDAC, amd64: Bump driver version
MAINTAINERS, EDAC: Update email for Thor Thayer
EDAC, fsl_ddr: Make locally used symbols static
EDAC, mpc85xx: Add T2080 l2-cache support
EDAC, amd64: Add x86cpuid sanity check during init
EDAC, amd64: Don't treat ECC disabled as failure
EDAC: Add routine to check if MC devices list is empty
EDAC, amd64: Remove unused printing macros
EDAC, amd64: Rework messages in ecc_enabled()
EDAC, amd64: Move global code out of instance functions
EDAC, amd64: Free unused memory when init_one_instance() fails
EDAC, mce_amd: Give more context to deferred error message
EDAC, i7300: Test for the second channel properly
EDAC, sb_edac: Get rid of ->show_interleave_mode()
EDAC: Expose per-DIMM error counts in sysfs
EDAC, amd64: Save and return err code from probe_one_instance()
EDAC, i82975x: Add ioremap_nocache() error handling
EDAC: Fix typos in enum mem_type comments
EDAC: Make dev_attr_sdram_scrub_rate static
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* pm-cpufreq: (28 commits)
MAINTAINERS: cpufreq: add bmips-cpufreq.c
cpufreq: CPPC: add ACPI_PROCESSOR dependency
cpufreq: make ti-cpufreq explicitly non-modular
cpufreq: Do not clear real_cpus mask on policy init
cpufreq: dt: Don't use generic platdev driver for ti-cpufreq platforms
cpufreq: ti: Add cpufreq driver to determine available OPPs at runtime
Documentation: dt: add bindings for ti-cpufreq
cpufreq: qoriq: Don't look at clock implementation details
cpufreq: qoriq: add ARM64 SoCs support
cpufreq: brcmstb-avs-cpufreq: remove unnecessary platform_set_drvdata()
cpufreq: s3c2416: double free on driver init error path
MIPS: BMIPS: enable CPUfreq
cpufreq: bmips-cpufreq: CPUfreq driver for Broadcom's BMIPS SoCs
BMIPS: Enable prerequisites for CPUfreq in MIPS Kconfig.
MIPS: BMIPS: Update defconfig
cpufreq: Fix typos in comments
cpufreq: intel_pstate: Calculate guaranteed performance for HWP
cpufreq: intel_pstate: Make HWP limits compatible with legacy
cpufreq: intel_pstate: Lower frequency than expected under no_turbo
cpufreq: intel_pstate: Operation mode control from sysfs
...
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
Paul Mackerras writes:
"Please do a pull from my kvm-ppc-next branch to get some fixes which I
would like to have in 4.11. There are four small commits there; two
are fixes for potential host crashes in the new HPT resizing code, and
the other two are changes to printks to make KVM on PPC a little less
noisy."
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Bare metal systems without PCI don't exist, so there's no real point in
making PCI optional, it just breaks the build from time to time. In fact
the build is broken now if you turn off PCI_MSI but enable KVM.
Using select for PCI is OK because we (powerpc) define config PCI, and it
has no dependencies. Selecting PCI_MSI is slightly fishy, because it's
in drivers/pci and it is user-visible, but its only dependency is PCI,
so selecting it can't actually lead to breakage.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next
Freescale updates from Scott:
"Highlights include 8xx breakpoints and perf, t1042rdb display support,
and board updates."
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Commit b91e1302ad9b8 ("mm: optimize PageWaiters bit use for
unlock_page()") added a special bitop function to speed up
unlock_page(). Implement this for 64-bit powerpc.
This improves the unlock_page() core code from this:
li 9,1
lwsync
1: ldarx 10,0,3,0
andc 10,10,9
stdcx. 10,0,3
bne- 1b
ori 2,2,0
ld 9,0(3)
andi. 10,9,0x80
beqlr
li 4,0
b wake_up_page_bit
To this:
li 10,1
lwsync
1: ldarx 9,0,3,0
andc 9,9,10
stdcx. 9,0,3
bne- 1b
andi. 10,9,0x80
beqlr
li 4,0
b wake_up_page_bit
In a test of elapsed time for dd writing into 16GB of already-dirty
pagecache on a POWER8 with 4K pages, which has one unlock_page per 4kB
this patch reduced overhead by 1.1%:
N Min Max Median Avg Stddev
x 19 2.578 2.619 2.594 2.595 0.011
+ 19 2.552 2.592 2.564 2.565 0.008
Difference at 95.0% confidence
-0.030 +/- 0.006
-1.142% +/- 0.243%
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Made 64-bit only until I can test it properly on 32-bit]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The new HPT resizing code added in commit b5baa6877315 ("KVM: PPC:
Book3S HV: KVM-HV HPT resizing implementation", 2016-12-20) doesn't
have code to handle the new HPTE format which POWER9 uses. Thus it
would be best not to advertise it to userspace on POWER9 systems
until it works properly.
Also, since resize_hpt_rehash_hpte() contains BUG_ON() calls that
could be hit on POWER9, let's prevent it from being called on POWER9
for now.
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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Long standing issue with JITed programs is that stack traces from
function tracing check whether a given address is kernel code
through {__,}kernel_text_address(), which checks for code in core
kernel, modules and dynamically allocated ftrace trampolines. But
what is still missing is BPF JITed programs (interpreted programs
are not an issue as __bpf_prog_run() will be attributed to them),
thus when a stack trace is triggered, the code walking the stack
won't see any of the JITed ones. The same for address correlation
done from user space via reading /proc/kallsyms. This is read by
tools like perf, but the latter is also useful for permanent live
tracing with eBPF itself in combination with stack maps when other
eBPF types are part of the callchain. See offwaketime example on
dumping stack from a map.
This work tries to tackle that issue by making the addresses and
symbols known to the kernel. The lookup from *kernel_text_address()
is implemented through a latched RB tree that can be read under
RCU in fast-path that is also shared for symbol/size/offset lookup
for a specific given address in kallsyms. The slow-path iteration
through all symbols in the seq file done via RCU list, which holds
a tiny fraction of all exported ksyms, usually below 0.1 percent.
Function symbols are exported as bpf_prog_<tag>, in order to aide
debugging and attribution. This facility is currently enabled for
root-only when bpf_jit_kallsyms is set to 1, and disabled if hardening
is active in any mode. The rationale behind this is that still a lot
of systems ship with world read permissions on kallsyms thus addresses
should not get suddenly exposed for them. If that situation gets
much better in future, we always have the option to change the
default on this. Likewise, unprivileged programs are not allowed
to add entries there either, but that is less of a concern as most
such programs types relevant in this context are for root-only anyway.
If enabled, call graphs and stack traces will then show a correct
attribution; one example is illustrated below, where the trace is
now visible in tooling such as perf script --kallsyms=/proc/kallsyms
and friends.
Before:
7fff8166889d bpf_clone_redirect+0x80007f0020ed (/lib/modules/4.9.0-rc8+/build/vmlinux)
f5d80 __sendmsg_nocancel+0xffff006451f1a007 (/usr/lib64/libc-2.18.so)
After:
7fff816688b7 bpf_clone_redirect+0x80007f002107 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fffa0575728 bpf_prog_33c45a467c9e061a+0x8000600020fb (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fffa07ef1fc cls_bpf_classify+0x8000600020dc (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff81678b68 tc_classify+0x80007f002078 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff8164d40b __netif_receive_skb_core+0x80007f0025fb (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff8164d718 __netif_receive_skb+0x80007f002018 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff8164e565 process_backlog+0x80007f002095 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff8164dc71 net_rx_action+0x80007f002231 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff81767461 __softirqentry_text_start+0x80007f0020d1 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff817658ac do_softirq_own_stack+0x80007f00201c (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff810a2c20 do_softirq+0x80007f002050 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff810a2cb5 __local_bh_enable_ip+0x80007f002085 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff8168d452 ip_finish_output2+0x80007f002152 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff8168ea3d ip_finish_output+0x80007f00217d (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff8168f2af ip_output+0x80007f00203f (/lib/modules/4.9.0-rc8+/build/vmlinux)
[...]
7fff81005854 do_syscall_64+0x80007f002054 (/lib/modules/4.9.0-rc8+/build/vmlinux)
7fff817649eb return_from_SYSCALL_64+0x80007f002000 (/lib/modules/4.9.0-rc8+/build/vmlinux)
f5d80 __sendmsg_nocancel+0xffff01c484812007 (/usr/lib64/libc-2.18.so)
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
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Remove the dummy bpf_jit_compile() stubs for eBPF JITs and make
that a single __weak function in the core that can be overridden
similarly to the eBPF one. Also remove stale pr_err() mentions
of bpf_jit_compile.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fix from Michael Ellerman:
"One fix from Paul: we can not use the radix MMU under a hypervisor for
now.
Although the code checked if the processor supports radix, that is not
sufficient"
* tag 'powerpc-4.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64: Disable use of radix under a hypervisor
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The purpose of the KVM_SET_SIGNAL_MASK API is to let userspace "kick"
a VCPU out of KVM_RUN through a POSIX signal. A signal is attached
to a dummy signal handler; by blocking the signal outside KVM_RUN and
unblocking it inside, this possible race is closed:
VCPU thread service thread
--------------------------------------------------------------
check flag
set flag
raise signal
(signal handler does nothing)
KVM_RUN
However, one issue with KVM_SET_SIGNAL_MASK is that it has to take
tsk->sighand->siglock on every KVM_RUN. This lock is often on a
remote NUMA node, because it is on the node of a thread's creator.
Taking this lock can be very expensive if there are many userspace
exits (as is the case for SMP Windows VMs without Hyper-V reference
time counter).
As an alternative, we can put the flag directly in kvm_run so that
KVM can see it:
VCPU thread service thread
--------------------------------------------------------------
raise signal
signal handler
set run->immediate_exit
KVM_RUN
check run->immediate_exit
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The local variable @iov isn't used, to remove it.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The CAPI driver creates virtual PHB (vPHB) from the CAPI adapter.
The vPHB's IO and memory windows aren't built from device-tree node
as we do for normal PHBs. A error message is thrown in below path
when trying to probe AFUs contained in the adapter. The error message
is confusing and unnecessary.
cxl_probe()
pci_init_afu()
cxl_pci_vphb_add()
pcibios_scan_phb()
pcibios_setup_phb_resources()
This removes the error message. We might have the case where the
first memory window on real PHB isn't populated properly because
of error in "ranges" property in the device-tree node. We can check
the device-tree instead for that. This also removes one unnecessary
blank line in the function.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This fixes the typo about the _PAGE_PTE in set_pte_at() by changing
"tryint" to "trying to".
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The average user likely does not know what a "htab" or "LPID" is,
and it's annoying that these messages are quickly filling the dmesg
log when you're doing boot cycle tests, so let's turn it into a debug
message instead.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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PVR value of 0x0F000005 means we are arch v3.00 compliant (i.e. POWER9).
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Russell Currey <ruscur@russell.cc>
[mpe: Don't set num_pmcs, so we keep the PMU fields from the raw entry]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Cleanup to use is_kernel_addr macro.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Since power9 does not support FAB_*_MATCH bits in MMCR1,
avoid these checks for power9. For this, patch factor out
code in isa207_get_constraint() to retain these checks
only for power8.
Patch also updates the comment in power9-pmu raw event
encode layout to remove FAB_*_MATCH.
Finally for power9, patch adds additional check for
threshold events when adding the thresh mask and value in
isa207_get_constraint().
fixes: 7ffd948fae4c ('powerpc/perf: factor out power8 pmu functions')
fixes: 18201b204286 ('powerpc/perf: power9 raw event format encoding')
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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PMC5 on POWER9 DD1 may not provide right counts in all
sampling scenarios, hence use PM_INST_DISP event instead
in PMC2 or PMC3 in preference.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Since PM_INST_DISP include speculative instruction,
based on the workload the dispatch count could vary
considerably. Hence as an alternative, for completed
instruction counting, program the PM_INST_DISP event
to the MMCR* but use Instruction Counter register value.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Since PM_INST_CMPL may not provide right counts in all
sampling scenarios in power9 DD1, instead use PM_INST_DISP.
Patch also update generic instruction sampling with the same.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.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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Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Factor out the power8 event_alternative function to share
the code with power9.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Indexed-count remove for memory hotplug guarantees that a contiguous block
of <count> lmbs beginning at a specified <index> will be unassigned (NOT
that <count> lmbs will be removed). Because of Qemu's per-DIMM memory
management, the removal of a contiguous block of memory currently
requires a series of individual calls. Indexed-count remove reduces
this series into a single call.
Signed-off-by: Sahil Mehta <sahilmehta17@gmail.com>
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Indexed-count add for memory hotplug guarantees that a contiguous block
of <count> lmbs beginning at a specified <drc index> will be assigned,
any LMBs in this range that are not already assigned will be DLPAR added.
Because of Qemu's per-DIMM memory management, the addition of a contiguous
block of memory currently requires a series of individual calls to add
each LMB in the block. Indexed-count add reduces this series of calls to
a single call for the entire block.
Signed-off-by: Sahil Mehta <sahilmehta17@gmail.com>
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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kvm_ppc_mmu_book3s_32/64 xlat() logs "KVM can't copy data" error
upon failing to copy user data to kernel space. This floods kernel
log once such fails occur in short time period. Ratelimit this
error to avoid flooding kernel logs upon copy data failures.
Signed-off-by: Vipin K Parashar <vipin@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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We can't sensibly take a trap at this point. So, blacklist these
symbols.
Reported-by: Anton Blanchard <anton@samba.org>
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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slb_finish_load and slb_finish_load_1T are both only used within
slb_low.S, so make them local symbols.
This makes the code a little clearer, as it's more obvious neither is
intended to be an entry point from arbitrary other code, only the uses
in this file.
It also prevents them being used with kprobes and other tracing tools,
which is good because we're not able to safely take traps at these
locations, so making them local symbols avoids us needing to blacklist
them.
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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resize_hpt_release(), called once the HPT resize of a KVM guest is
completed (successfully or unsuccessfully) frees the state structure for
the resize. It is currently not safe to call with a NULL pointer.
However, one of the error paths in kvm_vm_ioctl_resize_hpt_commit() can
invoke it with a NULL pointer. This will occur if userspace improperly
invokes KVM_PPC_RESIZE_HPT_COMMIT without previously calling
KVM_PPC_RESIZE_HPT_PREPARE, or if it calls COMMIT twice without an
intervening PREPARE.
To fix this potential crash bug - and maybe others like it, make it safe
(and a no-op) to call resize_hpt_release() with a NULL resize pointer.
Found by Dan Carpenter with a static checker.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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Currently, if the kernel is running on a POWER9 processor under a
hypervisor, it may try to use the radix MMU even though it doesn't have
the necessary code to do so (it doesn't negotiate use of radix, and it
doesn't do the H_REGISTER_PROC_TBL hcall). If the hypervisor supports
both radix and HPT, then it will set up the guest to use HPT (since the
guest doesn't request radix in the CAS call), but if the radix feature
bit is set in the ibm,pa-features property (which is valid, since
ibm,pa-features is defined to represent the capabilities of the
processor) the guest will try to use radix, resulting in a crash when
it turns the MMU on.
This makes the minimal fix for the current code, which is to disable
radix unless we are running in hypervisor mode.
Fixes: 2bfd65e45e87 ("powerpc/mm/radix: Add radix callbacks for early init routines")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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We broke the build when CONFIG_MEMORY_HOTREMOVE=n:
arch/powerpc/platforms/pseries/hotplug-memory.c:821:8: error: implicit
declaration of function 'dlpar_memory_readd_by_index'
Add a dummy to fix it.
Fixes: e70d59700fc3 ("powerpc/pseries: Introduce memory hotplug READD operation")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
This brings in two fixes for potential host crashes, from Ben
Herrenschmidt and Nick Piggin.
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There are quite a few entries in asm-offests.c which look like:
DEFINE(REG, STACK_FRAME_OVERHEAD+offsetof(struct pt_regs, reg));
So define a macro to do it once.
Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
[mpe: Rename to STACK_PT_REGS_OFFSET for excruciating explicitness]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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A lot of entries in asm-offests.c look like this:
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
But there is a common macro, OFFSET, which makes this cleaner:
OFFSET(TI_flags, thread_info, flags)
So use it.
Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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In all the years it's been in the tree it had never been used by
anything - it would instantly trigger BUG_ON() in fs/fcntl.c due to
bogus band argument (ie. POLLIN not POLL_IN) passed to kill_fasync().
Since nobody had ever used it in ten years, let's just rip it out and be
done with that.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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WARN_ONCE() takes a condition and a format string. We were passing a
constant string as the condition, and the function name as the format
string. It would work, but the message would be just the function name.
Fix it by just using WARN_ONCE() directly instead of if (x) WARN_ONCE().
Noticed-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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We're supporting surprise hotplug on PCI slots behind root port
or PCIe switch downstream ports, which don't claim the capability
in hardware register (offset: PCIe cap + PCI_EXP_SLTCAP). PEX8718
is one of the examples. For those PCI slots, the PDC (Presence
Detection Change) event isn't reliable and the underly (skiboot)
firmware has best judgement.
This masks the PDC event when skiboot requests by "ibm,slot-broken-pdc"
property in PCI slot's device-tree node.
Reported-by: Hank Chang <hankmax0000@gmail.com>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Tested-by: Willie Liauw <williel@supermicro.com.tw>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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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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We do them at the start of tlb flush, and we are sure a pte update will be
followed by a tlbflush. Hence we can skip the ptesync in pte update helpers.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
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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This helps us to do some optimization for application exit case, where we can
skip the DD1 style pte update sequence.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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In the kernel we do follow the below sequence in different code paths.
pte = ptep_get_clear(ptep)
....
set_pte_at(ptep, pte)
We do that for mremap, autonuma protection update and softdirty clearing. This
implies our optimization to skip a tlb flush when clearing a pte update is
not valid, because for DD1 system that followup set_pte_at will be done witout
doing the required tlbflush. Fix that by always doing the dd1 style pte update
irrespective of new_pte value. In a later patch we will optimize the application
exit case.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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With radix, we can get page fault with DSISR_PROTFAULT value set in case of
PROT_NONE or autonuma mapping. The PROT_NONE case in handled by the vma check
where we consider the access bad. For autonuma we should fall through and fixup
the access mask correctly.
Without this patch we trigger the WARN_ON() on radix. This code moves that
WARN_ON() within a radix_enabled() check. I also moved the WARN_ON() outside
the if condition making it apply for all type of faults (exec/write/read). It
is also conditionalized for book3s, because BOOK3E can also get a PROTFAULT to
handle the D/I cache sync.
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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Currently xmon data-breakpoint feature is broken.
Whenever there is a watchpoint match occurs, hw_breakpoint_handler will
be called by do_break via notifier chains mechanism. If watchpoint is
registered by xmon, hw_breakpoint_handler won't find any associated
perf_event and returns immediately with NOTIFY_STOP. Similarly, do_break
also returns without notifying to xmon.
Solve this by returning NOTIFY_DONE when hw_breakpoint_handler does not
find any perf_event associated with matched watchpoint, rather than
NOTIFY_STOP, which tells the core code to continue calling the other
breakpoint handlers including the xmon one.
Cc: stable@vger.kernel.org
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The recently merged HPT (Hash Page Table) resize support broke the build
when BOOK3S_64=n (ie. 32-bit or 64-bit Book3E) and MEMORY_HOTPLUG=y:
arch/powerpc/mm/mem.o: In function `.arch_add_memory':
(.text+0x4e4): undefined reference to `.resize_hpt_for_hotplug'
Fix it by adding a dummy version.
Fixes: 438cc81a41e8 ("powerpc/pseries: Automatically resize HPT for memory hot add/remove")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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