| Commit message (Collapse) | Author | Age | Files | Lines |
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Useful to be able to dump the kernel hash page table to check
which pages are hashed along with their sizes and other details.
Add a debugfs file to check the hash page table. If radix is enabled
(and so there is no hash page table) then this file doesn't exist. To
use this the PPC_PTDUMP config option must be selected.
Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
[mpe: Fix build with SPARSEMEM_VMEMMAP=n & PSERIES=n]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Useful to be able to dump the kernels page tables to check permissions
and memory types - derived from arm64's implementation.
Add a debugfs file to check the page tables. To use this the PPC_PTDUMP
config option must be selected.
Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Currently there's some CMO (Cooperative Memory Overcommit) code, in
plpar_wrappers.h. Some of it is #ifdef CONFIG_PSERIES and some of it
isn't. The end result being if a file includes plpar_wrappers.h it won't
build with CONFIG_PSERIES=n.
Fix it by moving the CMO code into platforms/pseries. The two hcall
wrappers can just be moved into their only caller, cmm.c, and the
accessors can go in pseries.h.
Note we need the accessors because cmm.c can be built as a module, so
there needs to be a split between the built-in code vs the module, and
that's achieved by using those accessors.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Rename "sift" to "shift".
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts storcenter_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts pseries_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts ppc6xx_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts ppc64e_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts ppc64_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts pmac32_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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This patch disables deprecated IDE subsystem in pasemi_defconfig
(no IDE host drivers are selected in this config so there is no valid
reason to enable IDE subsystem itself).
Cc: Olof Johansson <olof@lixom.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts maple_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts g5_defconfig to use libata PATA drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts chrp32_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts cell_defconfig to use libata PATA drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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IDE subsystem has been deprecated since 2009 and the majority
(if not all) of Linux distributions have switched to use
libata for ATA support exclusively. However there are still
some users (mostly old or/and embedded non-x86 systems) that
have not converted from using IDE subsystem to libata PATA
drivers. This doesn't seem to be good thing in the long-term
for Linux as while there is less and less PATA systems left
in use:
* testing efforts are divided between two subsystems
* having duplicate drivers for same hardware confuses users
This patch converts amigaone_defconfig to use libata PATA
drivers.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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Add comment clarifying that vio_find_node() takes a reference to the
embedded struct device which needs to be dropped after use.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Make sure to drop any reference taken by bus_find_device() when creating
devices during init and driver registration.
Fixes: 55347cc9962f ("[POWERPC] ibmebus: Add device creation and bus probing based on of_device")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Make sure to drop any reference taken by bus_find_device() in the sysfs
callbacks that are used to create and destroy devices based on
device-tree entries.
Fixes: 6bccf755ff53 ("[POWERPC] ibmebus: dynamic addition/removal of adapters, some code cleanup")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This condenses the opal node searching into a single function that finds
all compatible nodes, instead of just searching the ibm,opal children,
for ipmi, flash, and prd similar to how opal-i2c nodes are found.
Signed-off-by: Jack Miller <jack@codezen.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Load monitored is no longer supported on POWER9 so let's remove the
code.
This reverts commit bd3ea317fddf ("powerpc: Load Monitor Register
Support").
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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No one uses reiserfs much these days, or is likely to in future. So drop
it from pseries and powernv defconfigs to save time and space. It's
still enabled in ppc64_defconfig so we get some build coverage.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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In ISA v2.05, the tlbiel instruction takes two arguments, RB and L:
tlbiel RB,L
+---------+---------+----+---------+---------+---------+----+
| 31 | / | L | / | RB | 274 | / |
| 31 - 26 | 25 - 22 | 21 | 20 - 16 | 15 - 11 | 10 - 1 | 0 |
+---------+---------+----+---------+---------+---------+----+
In ISA v2.06 tlbiel takes only one argument, RB:
tlbiel RB
+---------+---------+---------+---------+---------+----+
| 31 | / | / | RB | 274 | / |
| 31 - 26 | 25 - 21 | 20 - 16 | 15 - 11 | 10 - 1 | 0 |
+---------+---------+---------+---------+---------+----+
And in ISA v3.00 tlbiel takes five arguments:
tlbiel RB,RS,RIC,PRS,R
+---------+---------+----+---------+----+----+---------+---------+----+
| 31 | RS | / | RIC |PRS | R | RB | 274 | / |
| 31 - 26 | 25 - 21 | 20 | 19 - 18 | 17 | 16 | 15 - 11 | 10 - 1 | 0 |
+---------+---------+----+---------+----+----+---------+---------+----+
However the assembler also accepts "tlbiel RB", and generates
"tlbiel RB,r0,0,0,0".
As you can see above the L field from the v2.05 encoding overlaps with the
reserved field of the v2.06 encoding, and the low bit of the RS field of the
v3.00 encoding.
Currently in __tlbiel() we generate two tlbiel instructions manually using hex
constants. In the first case, for MMU_PAGE_4K, we generate "tlbiel RB,0", which
is safe in all cases, because the L bit is zero.
However in the default case we generate "tlbiel RB,1", therefore setting bit 21
to 1.
This is not an actual bug on v2.06 processors, because the CPU ignores the value
of the reserved field. However software is supposed to encode the reserved
fields as zero to enable forward compatibility.
On v3.00 processors setting bit 21 to 1 and no other bits of RS, means we are
using r1 for the value of RS.
Although it's not obvious, the code sets the IS field (bits 10-11) to 0 (by
omission), and L=1, in the va value, which is passed as RB. We also pass R=0 in
the instruction.
The combination of IS=0, L=1 and R=0 means the value of RS is not used, so even
on ISA v3.00 there is no actual bug.
We should still fix it, as setting a reserved bit on v2.06 is naughty, and we
are only avoiding a bug on v3.00 by accident rather than design. Use
ASM_FTR_IFSET() to generate the single argument form on ISA v2.06 and later, and
the two argument form on pre v2.06.
Although there may be very old toolchains which don't understand tlbiel, we have
other code in the tree which has been using tlbiel for over five years, and no
one has reported any build failures, so just let the assembler generate the
instructions.
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
[mpe: Rewrite change log, use IFSET instead of IFCLR]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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When we're not compiling for a specific CPU, ie. none of the
CONFIG_POWERx_CPU options are set, and CONFIG_GENERIC_CPU *is* set, we
currently don't pass any -mcpu option to the compiler. This means the
compiler builds for a "generic" Power CPU.
But back in 2014 we dropped support for pre power4 CPUs in commit
468a33028edd ("powerpc: Drop support for pre-POWER4 cpus").
Given that, there's no point in building the kernel to run on pre power4
cpus. So update the flags we pass to the compiler when
CONFIG_GENERIC_CPU is set, to specify -mcpu=power4.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This adds a config option that can help exercise the case when
the kernel is not running at PAGE_OFFSET.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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An hcall was recently added that does exactly what we need during kexec
- it clears the entire MMU hash table, ignoring any VRMA mappings.
Try it and fall back to the old method if we get a failure.
On a POWER8 box with 5TB of memory, this reduces the time it takes to
kexec a new kernel from from 4 minutes to 1 minute.
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
[mpe: Split into separate functions and tweak function naming]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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That's unclear why lockdep shows the following warning but adding a
lockdep class to struct pmac_i2c_bus solves it
[ 20.507795] ======================================================
[ 20.507796] [ INFO: possible circular locking dependency detected ]
[ 20.507800] 4.8.0-rc7-00037-gd2ffb01 #21 Not tainted
[ 20.507801] -------------------------------------------------------
[ 20.507803] swapper/0/1 is trying to acquire lock:
[ 20.507818] (&bus->mutex){+.+.+.}, at: [<c000000000052830>] .pmac_i2c_open+0x30/0x100
[ 20.507819]
[ 20.507819] but task is already holding lock:
[ 20.507829] (&policy->rwsem){+.+.+.}, at: [<c00000000068adcc>] .cpufreq_online+0x1ac/0x9d0
[ 20.507830]
[ 20.507830] which lock already depends on the new lock.
[ 20.507830]
[ 20.507832]
[ 20.507832] the existing dependency chain (in reverse order) is:
[ 20.507837]
[ 20.507837] -> #4 (&policy->rwsem){+.+.+.}:
[ 20.507844] [<c00000000082385c>] .down_write+0x6c/0x110
[ 20.507849] [<c00000000068adcc>] .cpufreq_online+0x1ac/0x9d0
[ 20.507855] [<c0000000004d76d8>] .subsys_interface_register+0xb8/0x110
[ 20.507860] [<c000000000689bb0>] .cpufreq_register_driver+0x1d0/0x250
[ 20.507866] [<c000000000b4f8f4>] .g5_cpufreq_init+0x9cc/0xa28
[ 20.507872] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0
[ 20.507878] [<c000000000b0f86c>] .kernel_init_freeable+0x1ac/0x28c
[ 20.507883] [<c00000000000b3bc>] .kernel_init+0x1c/0x140
[ 20.507887] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64
[ 20.507894]
[ 20.507894] -> #3 (subsys mutex#2){+.+.+.}:
[ 20.507899] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590
[ 20.507903] [<c0000000004d7f24>] .bus_probe_device+0x44/0xe0
[ 20.507907] [<c0000000004d5208>] .device_add+0x508/0x730
[ 20.507911] [<c0000000004dd528>] .register_cpu+0x118/0x190
[ 20.507916] [<c000000000b14450>] .topology_init+0x148/0x248
[ 20.507921] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0
[ 20.507925] [<c000000000b0f86c>] .kernel_init_freeable+0x1ac/0x28c
[ 20.507929] [<c00000000000b3bc>] .kernel_init+0x1c/0x140
[ 20.507934] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64
[ 20.507939]
[ 20.507939] -> #2 (cpu_add_remove_lock){+.+.+.}:
[ 20.507944] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590
[ 20.507950] [<c000000000087a9c>] .register_cpu_notifier+0x2c/0x70
[ 20.507955] [<c000000000b267e0>] .spawn_ksoftirqd+0x18/0x4c
[ 20.507959] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0
[ 20.507964] [<c000000000b0f770>] .kernel_init_freeable+0xb0/0x28c
[ 20.507968] [<c00000000000b3bc>] .kernel_init+0x1c/0x140
[ 20.507972] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64
[ 20.507978]
[ 20.507978] -> #1 (&host->mutex){+.+.+.}:
[ 20.507982] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590
[ 20.507987] [<c0000000000527e8>] .kw_i2c_open+0x18/0x30
[ 20.507991] [<c000000000052894>] .pmac_i2c_open+0x94/0x100
[ 20.507995] [<c000000000b220a0>] .smp_core99_probe+0x260/0x410
[ 20.507999] [<c000000000b185bc>] .smp_prepare_cpus+0x280/0x2ac
[ 20.508003] [<c000000000b0f748>] .kernel_init_freeable+0x88/0x28c
[ 20.508008] [<c00000000000b3bc>] .kernel_init+0x1c/0x140
[ 20.508012] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64
[ 20.508018]
[ 20.508018] -> #0 (&bus->mutex){+.+.+.}:
[ 20.508023] [<c0000000000ed5b4>] .lock_acquire+0x84/0x100
[ 20.508027] [<c000000000820448>] .mutex_lock_nested+0xa8/0x590
[ 20.508032] [<c000000000052830>] .pmac_i2c_open+0x30/0x100
[ 20.508037] [<c000000000052e14>] .pmac_i2c_do_begin+0x34/0x120
[ 20.508040] [<c000000000056bc0>] .pmf_call_one+0x50/0xd0
[ 20.508045] [<c00000000068ff1c>] .g5_pfunc_switch_volt+0x2c/0xc0
[ 20.508050] [<c00000000068fecc>] .g5_pfunc_switch_freq+0x1cc/0x1f0
[ 20.508054] [<c00000000068fc2c>] .g5_cpufreq_target+0x2c/0x40
[ 20.508058] [<c0000000006873ec>] .__cpufreq_driver_target+0x23c/0x840
[ 20.508062] [<c00000000068c798>] .cpufreq_gov_performance_limits+0x18/0x30
[ 20.508067] [<c00000000068915c>] .cpufreq_start_governor+0xac/0x100
[ 20.508071] [<c00000000068a788>] .cpufreq_set_policy+0x208/0x260
[ 20.508076] [<c00000000068abdc>] .cpufreq_init_policy+0x6c/0xb0
[ 20.508081] [<c00000000068ae70>] .cpufreq_online+0x250/0x9d0
[ 20.508085] [<c0000000004d76d8>] .subsys_interface_register+0xb8/0x110
[ 20.508090] [<c000000000689bb0>] .cpufreq_register_driver+0x1d0/0x250
[ 20.508094] [<c000000000b4f8f4>] .g5_cpufreq_init+0x9cc/0xa28
[ 20.508099] [<c00000000000a98c>] .do_one_initcall+0x5c/0x1d0
[ 20.508103] [<c000000000b0f86c>] .kernel_init_freeable+0x1ac/0x28c
[ 20.508107] [<c00000000000b3bc>] .kernel_init+0x1c/0x140
[ 20.508112] [<c0000000000098f4>] .ret_from_kernel_thread+0x58/0x64
[ 20.508113]
[ 20.508113] other info that might help us debug this:
[ 20.508113]
[ 20.508121] Chain exists of:
[ 20.508121] &bus->mutex --> subsys mutex#2 --> &policy->rwsem
[ 20.508121]
[ 20.508123] Possible unsafe locking scenario:
[ 20.508123]
[ 20.508124] CPU0 CPU1
[ 20.508125] ---- ----
[ 20.508128] lock(&policy->rwsem);
[ 20.508132] lock(subsys mutex#2);
[ 20.508135] lock(&policy->rwsem);
[ 20.508138] lock(&bus->mutex);
[ 20.508139]
[ 20.508139] *** DEADLOCK ***
[ 20.508139]
[ 20.508141] 3 locks held by swapper/0/1:
[ 20.508150] #0: (cpu_hotplug.lock){++++++}, at: [<c000000000087838>] .get_online_cpus+0x48/0xc0
[ 20.508159] #1: (subsys mutex#2){+.+.+.}, at: [<c0000000004d7670>] .subsys_interface_register+0x50/0x110
[ 20.508168] #2: (&policy->rwsem){+.+.+.}, at: [<c00000000068adcc>] .cpufreq_online+0x1ac/0x9d0
[ 20.508169]
[ 20.508169] stack backtrace:
[ 20.508173] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.8.0-rc7-00037-gd2ffb01 #21
[ 20.508175] Call Trace:
[ 20.508180] [c0000000790c2b90] [c00000000082cc70] .dump_stack+0xe0/0x14c (unreliable)
[ 20.508184] [c0000000790c2c20] [c000000000828c88] .print_circular_bug+0x350/0x388
[ 20.508188] [c0000000790c2cd0] [c0000000000ecb0c] .__lock_acquire+0x196c/0x1d30
[ 20.508192] [c0000000790c2e50] [c0000000000ed5b4] .lock_acquire+0x84/0x100
[ 20.508196] [c0000000790c2f20] [c000000000820448] .mutex_lock_nested+0xa8/0x590
[ 20.508201] [c0000000790c3030] [c000000000052830] .pmac_i2c_open+0x30/0x100
[ 20.508206] [c0000000790c30c0] [c000000000052e14] .pmac_i2c_do_begin+0x34/0x120
[ 20.508209] [c0000000790c3150] [c000000000056bc0] .pmf_call_one+0x50/0xd0
[ 20.508213] [c0000000790c31e0] [c00000000068ff1c] .g5_pfunc_switch_volt+0x2c/0xc0
[ 20.508217] [c0000000790c3250] [c00000000068fecc] .g5_pfunc_switch_freq+0x1cc/0x1f0
[ 20.508221] [c0000000790c3320] [c00000000068fc2c] .g5_cpufreq_target+0x2c/0x40
[ 20.508226] [c0000000790c3390] [c0000000006873ec] .__cpufreq_driver_target+0x23c/0x840
[ 20.508230] [c0000000790c3440] [c00000000068c798] .cpufreq_gov_performance_limits+0x18/0x30
[ 20.508235] [c0000000790c34b0] [c00000000068915c] .cpufreq_start_governor+0xac/0x100
[ 20.508239] [c0000000790c3530] [c00000000068a788] .cpufreq_set_policy+0x208/0x260
[ 20.508244] [c0000000790c35d0] [c00000000068abdc] .cpufreq_init_policy+0x6c/0xb0
[ 20.508249] [c0000000790c3940] [c00000000068ae70] .cpufreq_online+0x250/0x9d0
[ 20.508253] [c0000000790c3a30] [c0000000004d76d8] .subsys_interface_register+0xb8/0x110
[ 20.508258] [c0000000790c3ad0] [c000000000689bb0] .cpufreq_register_driver+0x1d0/0x250
[ 20.508262] [c0000000790c3b60] [c000000000b4f8f4] .g5_cpufreq_init+0x9cc/0xa28
[ 20.508267] [c0000000790c3c20] [c00000000000a98c] .do_one_initcall+0x5c/0x1d0
[ 20.508271] [c0000000790c3d00] [c000000000b0f86c] .kernel_init_freeable+0x1ac/0x28c
[ 20.508276] [c0000000790c3db0] [c00000000000b3bc] .kernel_init+0x1c/0x140
[ 20.508280] [c0000000790c3e30] [c0000000000098f4] .ret_from_kernel_thread+0x58/0x64
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This halves the exception table size on 64-bit builds, and it allows
build-time sorting of exception tables to work on relocated kernels.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Minor asm fixups and bits to keep the selftests working]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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This macro is taken from s390, and allows more flexibility in
changing exception table format.
mpe: Put it in ppc_asm.h and only define one version using
stringinfy_in_c(). Add some empty definitions and headers to keep the
selftests happy.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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We haven't seen these before, but the soon to be merged relative
exception tables support causes them to be generated.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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There's no reason to #error if we include ppc_asm.h in asm files, the
ifdef already prevents any problems.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Exception handlers are aligned to 128 bytes (L1 cache) on 64s, which is
overkill. It can reduce the icache footprint of any individual exception
path. However taken as a whole, the expansion in icache footprint seems
likely to be counter-productive and cause more total misses.
Create IFETCH_ALIGN_SHIFT/BYTES, which should give optimal ifetch
alignment with much more reasonable alignment. This saves 1792 bytes
from head_64.o text with an allmodconfig build.
Other subarchitectures should define appropriate IFETCH_ALIGN_SHIFT
values if this becomes more widely used.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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There are three #ifdef CONFIG_PPC_BOOK3E sections in nohash/64/pgtable.h.
And there should be no configurations possible which use nohash/64/pgtable.h
but don't also enable CONFIG_PPC_BOOK3E.
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Rui Teng <rui.teng@linux.vnet.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@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/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"This release has a few updates:
- STM can hook into the function tracer
- Function filtering now supports more advance glob matching
- Ftrace selftests updates and added tests
- Softirq tag in traces now show only softirqs
- ARM nop added to non traced locations at compile time
- New trace_marker_raw file that allows for binary input
- Optimizations to the ring buffer
- Removal of kmap in trace_marker
- Wakeup and irqsoff tracers now adhere to the set_graph_notrace file
- Other various fixes and clean ups"
* tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (42 commits)
selftests: ftrace: Shift down default message verbosity
kprobes/trace: Fix kprobe selftest for newer gcc
tracing/kprobes: Add a helper method to return number of probe hits
tracing/rb: Init the CPU mask on allocation
tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results
tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too
fgraph: Handle a case where a tracer ignores set_graph_notrace
tracing: Replace kmap with copy_from_user() in trace_marker writing
ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it
tracing: Allow benchmark to be enabled at early_initcall()
tracing: Have system enable return error if one of the events fail
tracing: Do not start benchmark on boot up
tracing: Have the reg function allow to fail
ring-buffer: Force rb_end_commit() and rb_set_commit_to_write() inline
ring-buffer: Froce rb_update_write_stamp() to be inlined
ring-buffer: Force inline of hotpath helper functions
tracing: Make __buffer_unlock_commit() always_inline
tracing: Make tracepoint_printk a static_key
ring-buffer: Always inline rb_event_data()
ring-buffer: Make rb_reserve_next_event() always inlined
...
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Some tracepoints have a registration function that gets enabled when the
tracepoint is enabled. There may be cases that the registraction function
must fail (for example, can't allocate enough memory). In this case, the
tracepoint should also fail to register, otherwise the user would not know
why the tracepoint is not working.
Cc: David Howells <dhowells@redhat.com>
Cc: Seiji Aguchi <seiji.aguchi@hds.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Merge more updates from Andrew Morton:
- a few misc things
- kexec updates
- DMA-mapping updates to better support networking DMA operations
- IPC updates
- various MM changes to improve DAX fault handling
- lots of radix-tree changes, mainly to the test suite. All leading up
to reimplementing the IDA/IDR code to be a wrapper layer over the
radix-tree. However the final trigger-pulling patch is held off for
4.11.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits)
radix tree test suite: delete unused rcupdate.c
radix tree test suite: add new tag check
radix-tree: ensure counts are initialised
radix tree test suite: cache recently freed objects
radix tree test suite: add some more functionality
idr: reduce the number of bits per level from 8 to 6
rxrpc: abstract away knowledge of IDR internals
tpm: use idr_find(), not idr_find_slowpath()
idr: add ida_is_empty
radix tree test suite: check multiorder iteration
radix-tree: fix replacement for multiorder entries
radix-tree: add radix_tree_split_preload()
radix-tree: add radix_tree_split
radix-tree: add radix_tree_join
radix-tree: delete radix_tree_range_tag_if_tagged()
radix-tree: delete radix_tree_locate_item()
radix-tree: improve multiorder iterators
btrfs: fix race in btrfs_free_dummy_fs_info()
radix-tree: improve dump output
radix-tree: make radix_tree_find_next_bit more useful
...
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Every single user of vmf->virtual_address typed that entry to unsigned
long before doing anything with it so the type of virtual_address does
not really provide us any additional safety. Just use masked
vmf->address which already has the appropriate type.
Link: http://lkml.kernel.org/r/1479460644-25076-3-git-send-email-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This change allows us to pass DMA_ATTR_SKIP_CPU_SYNC which allows us to
avoid invoking cache line invalidation if the driver will just handle it
via a sync_for_cpu or sync_for_device call.
Link: http://lkml.kernel.org/r/20161110113534.76501.86492.stgit@ahduyck-blue-test.jf.intel.com
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace updates from Eric Biederman:
"After a lot of discussion and work we have finally reachanged a basic
understanding of what is necessary to make unprivileged mounts safe in
the presence of EVM and IMA xattrs which the last commit in this
series reflects. While technically it is a revert the comments it adds
are important for people not getting confused in the future. Clearing
up that confusion allows us to seriously work on unprivileged mounts
of fuse in the next development cycle.
The rest of the fixes in this set are in the intersection of user
namespaces, ptrace, and exec. I started with the first fix which
started a feedback cycle of finding additional issues during review
and fixing them. Culiminating in a fix for a bug that has been present
since at least Linux v1.0.
Potentially these fixes were candidates for being merged during the rc
cycle, and are certainly backport candidates but enough little things
turned up during review and testing that I decided they should be
handled as part of the normal development process just to be certain
there were not any great surprises when it came time to backport some
of these fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
Revert "evm: Translate user/group ids relative to s_user_ns when computing HMAC"
exec: Ensure mm->user_ns contains the execed files
ptrace: Don't allow accessing an undumpable mm
ptrace: Capture the ptracer's creds not PT_PTRACE_CAP
mm: Add a user_ns owner to mm_struct and fix ptrace permission checks
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It is the reasonable expectation that if an executable file is not
readable there will be no way for a user without special privileges to
read the file. This is enforced in ptrace_attach but if ptrace
is already attached before exec there is no enforcement for read-only
executables.
As the only way to read such an mm is through access_process_vm
spin a variant called ptrace_access_vm that will fail if the
target process is not being ptraced by the current process, or
the current process did not have sufficient privileges when ptracing
began to read the target processes mm.
In the ptrace implementations replace access_process_vm by
ptrace_access_vm. There remain several ptrace sites that still use
access_process_vm as they are reading the target executables
instructions (for kernel consumption) or register stacks. As such it
does not appear necessary to add a permission check to those calls.
This bug has always existed in Linux.
Fixes: v1.0
Cc: stable@vger.kernel.org
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"Here is the crypto update for 4.10:
API:
- add skcipher walk interface
- add asynchronous compression (acomp) interface
- fix algif_aed AIO handling of zero buffer
Algorithms:
- fix unaligned access in poly1305
- fix DRBG output to large buffers
Drivers:
- add support for iMX6UL to caam
- fix givenc descriptors (used by IPsec) in caam
- accelerated SHA256/SHA512 for ARM64 from OpenSSL
- add SSE CRCT10DIF and CRC32 to ARM/ARM64
- add AEAD support to Chelsio chcr
- add Armada 8K support to omap-rng"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (148 commits)
crypto: testmgr - fix overlap in chunked tests again
crypto: arm/crc32 - accelerated support based on x86 SSE implementation
crypto: arm64/crc32 - accelerated support based on x86 SSE implementation
crypto: arm/crct10dif - port x86 SSE implementation to ARM
crypto: arm64/crct10dif - port x86 SSE implementation to arm64
crypto: testmgr - add/enhance test cases for CRC-T10DIF
crypto: testmgr - avoid overlap in chunked tests
crypto: chcr - checking for IS_ERR() instead of NULL
crypto: caam - check caam_emi_slow instead of re-lookup platform
crypto: algif_aead - fix AIO handling of zero buffer
crypto: aes-ce - Make aes_simd_algs static
crypto: algif_skcipher - set error code when kcalloc fails
crypto: caam - make aamalg_desc a proper module
crypto: caam - pass key buffers with typesafe pointers
crypto: arm64/aes-ce-ccm - Fix AEAD decryption length
MAINTAINERS: add crypto headers to crypto entry
crypt: doc - remove misleading mention of async API
crypto: doc - fix header file name
crypto: api - fix comment typo
crypto: skcipher - Add separate walker for AEAD decryption
..
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For consistency with the other 246 kernel configuration options,
rename CRYPT_CRC32C_VPMSUM to CRYPTO_CRC32C_VPMSUM.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Anton Blanchard <anton@samba.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Pull KVM updates from Paolo Bonzini:
"Small release, the most interesting stuff is x86 nested virt
improvements.
x86:
- userspace can now hide nested VMX features from guests
- nested VMX can now run Hyper-V in a guest
- support for AVX512_4VNNIW and AVX512_FMAPS in KVM
- infrastructure support for virtual Intel GPUs.
PPC:
- support for KVM guests on POWER9
- improved support for interrupt polling
- optimizations and cleanups.
s390:
- two small optimizations, more stuff is in flight and will be in
4.11.
ARM:
- support for the GICv3 ITS on 32bit platforms"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (94 commits)
arm64: KVM: pmu: Reset PMSELR_EL0.SEL to a sane value before entering the guest
KVM: arm/arm64: timer: Check for properly initialized timer on init
KVM: arm/arm64: vgic-v2: Limit ITARGETSR bits to number of VCPUs
KVM: x86: Handle the kthread worker using the new API
KVM: nVMX: invvpid handling improvements
KVM: nVMX: check host CR3 on vmentry and vmexit
KVM: nVMX: introduce nested_vmx_load_cr3 and call it on vmentry
KVM: nVMX: propagate errors from prepare_vmcs02
KVM: nVMX: fix CR3 load if L2 uses PAE paging and EPT
KVM: nVMX: load GUEST_EFER after GUEST_CR0 during emulated VM-entry
KVM: nVMX: generate MSR_IA32_CR{0,4}_FIXED1 from guest CPUID
KVM: nVMX: fix checks on CR{0,4} during virtual VMX operation
KVM: nVMX: support restore of VMX capability MSRs
KVM: nVMX: generate non-true VMX MSRs based on true versions
KVM: x86: Do not clear RFLAGS.TF when a singlestep trap occurs.
KVM: x86: Add kvm_skip_emulated_instruction and use it.
KVM: VMX: Move skip_emulated_instruction out of nested_vmx_check_vmcs12
KVM: VMX: Reorder some skip_emulated_instruction calls
KVM: x86: Add a return value to kvm_emulate_cpuid
KVM: PPC: Book3S: Move prototypes for KVM functions into kvm_ppc.h
...
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This moves the prototypes for functions that are only called from
assembler code out of asm/asm-prototypes.h into asm/kvm_ppc.h.
The prototypes were added in commit ebe4535fbe7a ("KVM: PPC:
Book3S HV: sparse: prototypes for functions called from assembler",
2016-10-10), but given that the functions are KVM functions,
having them in a KVM header will be better for long-term
maintenance.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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Fix comment block to match kernel comment style.
Fix print format from signed to unsigned.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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KVM_HALT_POLL_NS_DEFAULT is an arch specific constant which sets the
default value of the halt_poll_ns kvm module parameter which determines
the global maximum halt polling interval.
The current value for powerpc is 500000 (500us) which means that any
repetitive workload with a period of less than that can drive the cpu
usage to 100% where it may have been mostly idle without halt polling.
This presents the possibility of a large increase in power usage with
a comparatively small performance benefit.
Reduce the default to 10000 (10us) and a user can tune this themselves
to set their affinity for halt polling based on the trade off between power
and performance which they are willing to make.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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The kvm module parameter halt_poll_ns defines the global maximum halt
polling interval and can be dynamically changed by writing to the
/sys/module/kvm/parameters/halt_poll_ns sysfs file. However in kvm-hv
this module parameter value is only ever checked when we grow the current
polling interval for the given vcore. This means that if we decrease the
halt_poll_ns value below the current polling interval we won't see any
effect unless we try to grow the polling interval above the new max at some
point or it happens to be shrunk below the halt_poll_ns value.
Update the halt polling code so that we always check for a new module param
value of halt_poll_ns and set the current halt polling interval to it if
it's currently greater than the new max. This means that it's redundant to
also perform this check in the grow_halt_poll_ns() function now.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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The previous patch exported the variables which back the module parameters
of the generic kvm module. Now use these variables in the kvm-hv module
so that any change to the generic module parameters will also have the
same effect for the kvm-hv module. This removes the duplication of the
kvm module parameters which was redundant and should reduce confusion when
tuning them.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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