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On imx6sx accessing OCOTP directly is wrong because the ocotp clock
needs to be enabled first. Use the nvmem-cells binding instead.
This requirement does not apply to older imx6qdl chips because there the
ocotp access clock (clk_ipg_s) is always enabled.
This is visible by comparing the "System Clocks, Gating, and Override"
tables (OCOTP rows) in the 6DQ and 6SX manuals:
http://www.nxp.com/assets/documents/data/en/reference-manuals/IMX6SXRM.pdf
http://www.nxp.com/assets/documents/data/en/reference-manuals/IMX6DQRM.pdf
This happens to work right now because the ocotp clock might be enabled
for some other reason. In particular the it might be enabled from the
bootloader and it only gets disabled late during boot in
clk_disable_unused, after imx-thermal has completed probing.
If imx-thermal is compiled as a module then the system can hang on
probe.
Reported-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The container node in the iomuxc node is no longer necessary and causes
pinctl errors on the Ventana boards with analog video capture
since aa12693e4156adafdef80a8bd134123a6419621b:
pinctrl core: initialized pinctrl subsystem
imx6q-pinctrl 20e0000.iomuxc: no groups defined in /soc/aips-bus@02000000/iomuxc@020e0000/adv7180grp
imx6q-pinctrl 20e0000.iomuxc: no groups defined in /soc/aips-bus@02000000/iomuxc@020e0000/ipu2_csi1grp
imx6q-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
imx6q-pinctrl 20e0000.iomuxc: function 'iomuxc' not supported
imx6q-pinctrl 20e0000.iomuxc: invalid function iomuxc in map table
imx6q-pinctrl 20e0000.iomuxc: function 'iomuxc' not supported
imx6q-pinctrl 20e0000.iomuxc: invalid function iomuxc in map table
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Latest wandboard hardware revision is revd1, which brings the following
new features:
- PFUZE100 PMIC
- AR8035 Ethernet PHY
- Upgrade Wifi/BT chip to BCM4339/BCM43430.
Add support for the mx6, mx6dl and mx6qp revd1 variants.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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By default, the lcdif_pre_sel mux is switched to the pll3_pfd1_540m PFD
source. If this mux is allowed to propagate rate changes to its parent,
setting the LCDIF pixel clock rate to 9 MHz, as required by the LCD
panel, will cause the pll3_pfd1_540m PFD to be switched away from its
nominal rate to 288 MHz.
This has no negative side effects, as there are no other children to
this PFD. Still, to avoid surprises, it might be preferrable to switch
to the designated video PLL (pll5_video_div) as clock source for the
LCDIF pixel clock.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The imx-i2c driver supports automatic bus recovery via the GPIO
function of the I2C pins. Enable this functionality for the Ka-Ro
electronics TX53 modules.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Don't rely on the padctl settings established by the boot loader, but
explicitly specify the padctl values in DTB. This is also necessary to
be able to use the DTB files from the Linux kernel for future U-Boot
versions that support HW configuration via DTB.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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As the DS1339 driver now supports enabling the trickle charge feature
via DTB, add the appropriate properties to utilize this feature.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The display, that incorporates this touchpanel is obsolete and won't
be supported any more.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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It is not recommended to place the regulator nodes inside 'simple-bus',
so adjust them accordingly.
The motivation for rearranging this is to make it easier to add new
regulator nodes in the future.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The current GPL only licensing on the dts files makes it very
impractical for other software components licensed under another
license.
In order to make it easier for them to reuse our device trees,
relicense our dts files first under a GPL/X11 dual-license.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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As the DS1339 driver now supports enabling the trickle charge feature
via DTB, add the appropriate properties to utilize this feature.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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There were quite a few overlapping sets of changes here.
Daniel's bug fix for off-by-ones in the new BPF branch instructions,
along with the added allowances for "data_end > ptr + x" forms
collided with the metadata additions.
Along with those three changes came veritifer test cases, which in
their final form I tried to group together properly. If I had just
trimmed GIT's conflict tags as-is, this would have split up the
meta tests unnecessarily.
In the socketmap code, a set of preemption disabling changes
overlapped with the rename of bpf_compute_data_end() to
bpf_compute_data_pointers().
Changes were made to the mv88e6060.c driver set addr method
which got removed in net-next.
The hyperv transport socket layer had a locking change in 'net'
which overlapped with a change of socket state macro usage
in 'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some F14h machines have an erratum which, "under a highly specific
and detailed set of internal timing conditions" can lead to skipping
instructions and RIP corruption.
Add the fix for those machines when their BIOS doesn't apply it or
there simply isn't BIOS update for them.
Tested-by: <mirh@protonmail.ch>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sherry Hurwitz <sherry.hurwitz@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Link: http://lkml.kernel.org/r/20171022104731.28249-1-bp@alien8.de
Link: https://bugzilla.kernel.org/show_bug.cgi?id=197285
[ Added pr_info() that we activated the workaround. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A couple of fixes addressing the following issues:
- The last polishing for the TLB code, removing the last BUG_ON() and
the debug file along with tidying up the lazy TLB code.
- Prevent triple fault on 1st Gen. 486 caused by stupidly calling the
early IDT setup after the first function which causes a fault which
should be caught by the exception table.
- Limit the mmap of /dev/mem to valid addresses
- Prevent late microcode loading on Broadwell X
- Remove a redundant assignment in the cache info code"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Limit mmap() of /dev/mem to valid physical addresses
x86/mm: Remove debug/x86/tlb_defer_switch_to_init_mm
x86/mm: Tidy up "x86/mm: Flush more aggressively in lazy TLB mode"
x86/mm/64: Remove the last VM_BUG_ON() from the TLB code
x86/microcode/intel: Disable late loading on model 79
x86/idt: Initialize early IDT before cr4_init_shadow()
x86/cpu/intel_cacheinfo: Remove redundant assignment to 'this_leaf'
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Although kfree(NULL) is legal, it's a bit lazy to rely on that to
implement the error handling. So do it the normal Linux way using
labels for each failure path.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
[mpe: Squash a few patches and rewrite change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Fix a word in these descriptions.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The local variable "rc" will eventually be set only to an error code.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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In the hv-24x7 code there is a function memord() which tries to
implement a sort function return -1, 0, 1. However one of the
conditions is incorrect, such that it can never be true, because we
will have already returned.
I don't believe there is a bug in practice though, because the
comparisons are an optimisation prior to calling memcmp().
Fix it by swapping the second comparision, so it can be true.
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Back in 2008 we added support for "fast little-endian switch" in the
syscall path. This added a special case syscall number 0x1ebe, which
is caught very early in the system call exception and switches endian
with as little overhead as possible. See commit 745a14cc264b
("[POWERPC] Add fast little-endian switch system call") for full
details.
Although it is fast, it's also completely non standard. The "syscall
number" is out of the range of normal syscalls, it can't be traced or
audited, and it's a bit of a wart. To the best of our knowledge it was
only used by one program, now long since discontinued.
So in an effort to shake out any current users, put it behind a config
option, and make it default n. If anyone *is* using it they can
quickly reinstate it with a rebuild, and we can flip it to default y.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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So we can #ifdef them in the next patch.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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When dumping the paca in xmon we currently show kstack. Although it's
not hard it's a bit fiddly to work out what the bounds of the kernel
stack should be based on the kstack value.
To make life easier and "kstack_base" which is the base (lowest
address) of the kernel stack, eg:
kstack = 0xc0000000f1a7be30 (0x258)
kstack_base = 0xc0000000f1a78000
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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i2c-dev provides an interface for userspace programs to interact with I2C
devices, and is very helpful for I2C-related debugging.
Enable it in pseries_defconfig and powernv_defconfig. It's already enabled
in many other powerpc defconfigs.
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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We call these functions with non-NULL mm or vma. Hence we can skip the
NULL check in these functions. We also remove now unused function
__local_flush_hugetlb_page().
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Drop the checks with is_vm_hugetlb_page() as noticed by Nick]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Currently xmon could call XIVE functions from OPAL even if the XIVE is
disabled or does not exist in the system, as in POWER8 machines. This
causes the following exception:
1:mon> dx
cpu 0x1: Vector: 700 (Program Check) at [c000000423c93450]
pc: c00000000009cfa4: opal_xive_dump+0x50/0x68
lr: c0000000000997b8: opal_return+0x0/0x50
This patch simply checks if XIVE is enabled before calling XIVE
functions.
Fixes: 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller")
Suggested-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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The vdd10_lcd and vcc18_lcd regulators need to be enabled for HDMI output
to work, so add 'regulator-always-on', just as is done in rk3288-firefly.dtsi.
Also enable i2c5, the hdmi block and configure the correc cec pin.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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The CEC line can be routed to two possible pins. Define those pins.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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The dw-hdmi block needs the cec clk for the rk3288. Add it.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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Sai reported a warning during some MBA tests:
[ 236.755559] ======================================================
[ 236.762443] WARNING: possible circular locking dependency detected
[ 236.769328] 4.14.0-rc4-yocto-standard #8 Not tainted
[ 236.774857] ------------------------------------------------------
[ 236.781738] mount/10091 is trying to acquire lock:
[ 236.787071] (cpu_hotplug_lock.rw_sem){++++}, at: [<ffffffff8117f892>] static_key_enable+0x12/0x30
[ 236.797058]
but task is already holding lock:
[ 236.803552] (&type->s_umount_key#37/1){+.+.}, at: [<ffffffff81208b2f>] sget_userns+0x32f/0x520
[ 236.813247]
which lock already depends on the new lock.
[ 236.822353]
the existing dependency chain (in reverse order) is:
[ 236.830686]
-> #4 (&type->s_umount_key#37/1){+.+.}:
[ 236.837756] __lock_acquire+0x1100/0x11a0
[ 236.842799] lock_acquire+0xdf/0x1d0
[ 236.847363] down_write_nested+0x46/0x80
[ 236.852310] sget_userns+0x32f/0x520
[ 236.856873] kernfs_mount_ns+0x7e/0x1f0
[ 236.861728] rdt_mount+0x30c/0x440
[ 236.866096] mount_fs+0x38/0x150
[ 236.870262] vfs_kern_mount+0x67/0x150
[ 236.875015] do_mount+0x1df/0xd50
[ 236.879286] SyS_mount+0x95/0xe0
[ 236.883464] entry_SYSCALL_64_fastpath+0x18/0xad
[ 236.889183]
-> #3 (rdtgroup_mutex){+.+.}:
[ 236.895292] __lock_acquire+0x1100/0x11a0
[ 236.900337] lock_acquire+0xdf/0x1d0
[ 236.904899] __mutex_lock+0x80/0x8f0
[ 236.909459] mutex_lock_nested+0x1b/0x20
[ 236.914407] intel_rdt_online_cpu+0x3b/0x4a0
[ 236.919745] cpuhp_invoke_callback+0xce/0xb80
[ 236.925177] cpuhp_thread_fun+0x1c5/0x230
[ 236.930222] smpboot_thread_fn+0x11a/0x1e0
[ 236.935362] kthread+0x152/0x190
[ 236.939536] ret_from_fork+0x27/0x40
[ 236.944097]
-> #2 (cpuhp_state-up){+.+.}:
[ 236.950199] __lock_acquire+0x1100/0x11a0
[ 236.955241] lock_acquire+0xdf/0x1d0
[ 236.959800] cpuhp_issue_call+0x12e/0x1c0
[ 236.964845] __cpuhp_setup_state_cpuslocked+0x13b/0x2f0
[ 236.971242] __cpuhp_setup_state+0xa7/0x120
[ 236.976483] page_writeback_init+0x43/0x67
[ 236.981623] pagecache_init+0x38/0x3b
[ 236.986281] start_kernel+0x3c6/0x41a
[ 236.990931] x86_64_start_reservations+0x2a/0x2c
[ 236.996650] x86_64_start_kernel+0x72/0x75
[ 237.001793] verify_cpu+0x0/0xfb
[ 237.005966]
-> #1 (cpuhp_state_mutex){+.+.}:
[ 237.012364] __lock_acquire+0x1100/0x11a0
[ 237.017408] lock_acquire+0xdf/0x1d0
[ 237.021969] __mutex_lock+0x80/0x8f0
[ 237.026527] mutex_lock_nested+0x1b/0x20
[ 237.031475] __cpuhp_setup_state_cpuslocked+0x54/0x2f0
[ 237.037777] __cpuhp_setup_state+0xa7/0x120
[ 237.043013] page_alloc_init+0x28/0x30
[ 237.047769] start_kernel+0x148/0x41a
[ 237.052425] x86_64_start_reservations+0x2a/0x2c
[ 237.058145] x86_64_start_kernel+0x72/0x75
[ 237.063284] verify_cpu+0x0/0xfb
[ 237.067456]
-> #0 (cpu_hotplug_lock.rw_sem){++++}:
[ 237.074436] check_prev_add+0x401/0x800
[ 237.079286] __lock_acquire+0x1100/0x11a0
[ 237.084330] lock_acquire+0xdf/0x1d0
[ 237.088890] cpus_read_lock+0x42/0x90
[ 237.093548] static_key_enable+0x12/0x30
[ 237.098496] rdt_mount+0x406/0x440
[ 237.102862] mount_fs+0x38/0x150
[ 237.107035] vfs_kern_mount+0x67/0x150
[ 237.111787] do_mount+0x1df/0xd50
[ 237.116058] SyS_mount+0x95/0xe0
[ 237.120233] entry_SYSCALL_64_fastpath+0x18/0xad
[ 237.125952]
other info that might help us debug this:
[ 237.134867] Chain exists of:
cpu_hotplug_lock.rw_sem --> rdtgroup_mutex --> &type->s_umount_key#37/1
[ 237.148425] Possible unsafe locking scenario:
[ 237.155015] CPU0 CPU1
[ 237.160057] ---- ----
[ 237.165100] lock(&type->s_umount_key#37/1);
[ 237.169952] lock(rdtgroup_mutex);
[ 237.176641]
lock(&type->s_umount_key#37/1);
[ 237.184287] lock(cpu_hotplug_lock.rw_sem);
[ 237.189041]
*** DEADLOCK ***
When the resctrl filesystem is mounted the locks must be acquired in the
same order as was done when the cpus came online:
cpu_hotplug_lock before rdtgroup_mutex.
This also requires to switch the static_branch_enable() calls to the
_cpulocked variant because now cpu hotplug lock is held already.
[ tglx: Switched to cpus_read_[un]lock ]
Reported-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Acked-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Link: https://lkml.kernel.org/r/9c41b91bc2f47d9e95b62b213ecdb45623c47a9f.1508490116.git.reinette.chatre@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Lockdep warns about a potential deadlock:
[ 66.782842] ======================================================
[ 66.782888] WARNING: possible circular locking dependency detected
[ 66.782937] 4.14.0-rc2-test-test+ #48 Not tainted
[ 66.782983] ------------------------------------------------------
[ 66.783052] umount/336 is trying to acquire lock:
[ 66.783117] (cpu_hotplug_lock.rw_sem){++++}, at: [<ffffffff81032395>] rdt_kill_sb+0x215/0x390
[ 66.783193]
but task is already holding lock:
[ 66.783244] (rdtgroup_mutex){+.+.}, at: [<ffffffff810321b6>] rdt_kill_sb+0x36/0x390
[ 66.783305]
which lock already depends on the new lock.
[ 66.783364]
the existing dependency chain (in reverse order) is:
[ 66.783419]
-> #3 (rdtgroup_mutex){+.+.}:
[ 66.783467] __lock_acquire+0x1293/0x13f0
[ 66.783509] lock_acquire+0xaf/0x220
[ 66.783543] __mutex_lock+0x71/0x9b0
[ 66.783575] mutex_lock_nested+0x1b/0x20
[ 66.783610] intel_rdt_online_cpu+0x3b/0x430
[ 66.783649] cpuhp_invoke_callback+0xab/0x8e0
[ 66.783687] cpuhp_thread_fun+0x7a/0x150
[ 66.783722] smpboot_thread_fn+0x1cc/0x270
[ 66.783764] kthread+0x16e/0x190
[ 66.783794] ret_from_fork+0x27/0x40
[ 66.783825]
-> #2 (cpuhp_state){+.+.}:
[ 66.783870] __lock_acquire+0x1293/0x13f0
[ 66.783906] lock_acquire+0xaf/0x220
[ 66.783938] cpuhp_issue_call+0x102/0x170
[ 66.783974] __cpuhp_setup_state_cpuslocked+0x154/0x2a0
[ 66.784023] __cpuhp_setup_state+0xc7/0x170
[ 66.784061] page_writeback_init+0x43/0x67
[ 66.784097] pagecache_init+0x43/0x4a
[ 66.784131] start_kernel+0x3ad/0x3f7
[ 66.784165] x86_64_start_reservations+0x2a/0x2c
[ 66.784204] x86_64_start_kernel+0x72/0x75
[ 66.784241] verify_cpu+0x0/0xfb
[ 66.784270]
-> #1 (cpuhp_state_mutex){+.+.}:
[ 66.784319] __lock_acquire+0x1293/0x13f0
[ 66.784355] lock_acquire+0xaf/0x220
[ 66.784387] __mutex_lock+0x71/0x9b0
[ 66.784419] mutex_lock_nested+0x1b/0x20
[ 66.784454] __cpuhp_setup_state_cpuslocked+0x52/0x2a0
[ 66.784497] __cpuhp_setup_state+0xc7/0x170
[ 66.784535] page_alloc_init+0x28/0x30
[ 66.784569] start_kernel+0x148/0x3f7
[ 66.784602] x86_64_start_reservations+0x2a/0x2c
[ 66.784642] x86_64_start_kernel+0x72/0x75
[ 66.784678] verify_cpu+0x0/0xfb
[ 66.784707]
-> #0 (cpu_hotplug_lock.rw_sem){++++}:
[ 66.784759] check_prev_add+0x32f/0x6e0
[ 66.784794] __lock_acquire+0x1293/0x13f0
[ 66.784830] lock_acquire+0xaf/0x220
[ 66.784863] cpus_read_lock+0x3d/0xb0
[ 66.784896] rdt_kill_sb+0x215/0x390
[ 66.784930] deactivate_locked_super+0x3e/0x70
[ 66.784968] deactivate_super+0x40/0x60
[ 66.785003] cleanup_mnt+0x3f/0x80
[ 66.785034] __cleanup_mnt+0x12/0x20
[ 66.785070] task_work_run+0x8b/0xc0
[ 66.785103] exit_to_usermode_loop+0x94/0xa0
[ 66.786804] syscall_return_slowpath+0xe8/0x150
[ 66.788502] entry_SYSCALL_64_fastpath+0xab/0xad
[ 66.790194]
other info that might help us debug this:
[ 66.795139] Chain exists of:
cpu_hotplug_lock.rw_sem --> cpuhp_state --> rdtgroup_mutex
[ 66.800035] Possible unsafe locking scenario:
[ 66.803267] CPU0 CPU1
[ 66.804867] ---- ----
[ 66.806443] lock(rdtgroup_mutex);
[ 66.808002] lock(cpuhp_state);
[ 66.809565] lock(rdtgroup_mutex);
[ 66.811110] lock(cpu_hotplug_lock.rw_sem);
[ 66.812608]
*** DEADLOCK ***
[ 66.816983] 2 locks held by umount/336:
[ 66.818418] #0: (&type->s_umount_key#35){+.+.}, at: [<ffffffff81229738>] deactivate_super+0x38/0x60
[ 66.819922] #1: (rdtgroup_mutex){+.+.}, at: [<ffffffff810321b6>] rdt_kill_sb+0x36/0x390
When the resctrl filesystem is unmounted the locks should be obtain in the
locks in the same order as was done when the cpus came online:
cpu_hotplug_lock before rdtgroup_mutex.
This also requires to switch the static_branch_disable() calls to the
_cpulocked variant because now cpu hotplug lock is held already.
[ tglx: Switched to cpus_read_[un]lock ]
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Acked-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/cc292e76be073f7260604651711c47b09fd0dc81.1508490116.git.reinette.chatre@intel.com
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The platform informs via CPUID.(EAX=0x10, ECX=res#):EBX[31:0] (valid res#
are only 1 for L3 and 2 for L2) which unit of the allocation may be used by
other entities in the platform. This information is valid whether CDP (Code
and Data Prioritization) is enabled or not.
Ensure that the bitmask of shareable resource is initialized when CDP is
enabled.
Fixes: 0dd2d7494cd8 ("x86/intel_rdt: Show bitmask of shareable resource with other executing units"
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/815747bddc820ca221a8924edaf4d1a7324547e4.1508490116.git.reinette.chatre@intel.com
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When HYP code runs into branch profiling code, it attempts to jump to
unmapped memory, causing a HYP Panic.
Disable the branch profiling for code designed to run at HYP mode.
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
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When a exception is trapped to EL2, hardware uses ELR_ELx to hold
the current fault instruction address. If KVM wants to inject a
abort to 32 bit guest, it needs to set the LR register for the
guest to emulate this abort happened in the guest. Because ARM32
architecture is pipelined execution, so the LR value has an offset to
the fault instruction address.
The offsets applied to Link value for exceptions as shown below,
which should be added for the ARM32 link register(LR).
Table taken from ARMv8 ARM DDI0487B-B, table G1-10:
Exception Offset, for PE state of:
A32 T32
Undefined Instruction +4 +2
Prefetch Abort +4 +4
Data Abort +8 +8
IRQ or FIQ +4 +4
[ Removed unused variables in inject_abt to avoid compile warnings.
-- Christoffer ]
Cc: <stable@vger.kernel.org>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Tested-by: Haibin Zhang <zhanghaibin7@huawei.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
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Unfortunately userspace can construct a sigcontext which enables
suspend. Thus userspace can force Linux into a path where trechkpt is
executed.
This patch blocks this from happening on POWER9 by sanity checking
sigcontexts passed in.
ptrace doesn't have this problem as only MSR SE and BE can be changed
via ptrace.
This patch also adds a number of WARN_ON()s in case we ever enter
suspend when we shouldn't. This should not happen, but if it does the
symptoms are soft lockup warnings which are not obviously TM related,
so the WARN_ON()s should make it obvious what's happening.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Some Power9 revisions can run in a mode where TM operates without
suspended state. If we find ourself on a CPU that might be in this
mode, we query OPAL to check, and if so we reenable TM in CPU
features, and enable a new user feature to signal to userspace that we
are in this mode.
We do not enable the "normal" user feature, PPC_FEATURE2_HTM, but we
do enable PPC_FEATURE2_HTM_NOSC because that indicates to userspace
that the kernel will abort transactions on syscall entry, which is
true regardless of the suspend mode.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Pull ARM fixes from Russell King:
"Three fixes this time around:
- ensure sparse realises that we're building for a 32-bit arch on
64-bit hosts.
- use the correct instruction for semihosting on v7m (nommu) CPUs.
- reserve address 0 to prevent the first page of memory being used on
nommu systems"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8704/1: semihosting: use proper instruction on v7m processors
ARM: 8701/1: fix sparse flags for build on 64bit machines
ARM: 8700/1: nommu: always reserve address 0 away
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"Here is another set of bugfixes for ARM SoCs, mostly harmless:
- a boot regression fix on ux500
- PCIe interrupts on NXP i.MX7 and on Marvell Armada 7K/8K were wired
up wrong, in different ways
- Armada XP support for large memory never worked
- the socfpga reset controller now builds on 64-bit
- minor device tree corrections on gemini, mvebu, r-pi 3, rockchip
and at91"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: ux500: Fix regression while init PM domains
ARM: dts: fix PCLK name on Gemini and MOXA ART
arm64: dts: rockchip: fix typo in iommu nodes
arm64: dts: rockchip: correct vqmmc voltage for rk3399 platforms
ARM: dts: imx7d: Invert legacy PCI irq mapping
bus: mbus: fix window size calculation for 4GB windows
ARM: dts: at91: sama5d2: add ADC hw trigger edge type
ARM: dts: at91: sama5d2_xplained: enable ADTRG pin
ARM: dts: at91: at91-sama5d27_som1: fix PHY ID
ARM: dts: bcm283x: Fix console path on RPi3
reset: socfpga: fix for 64-bit compilation
ARM: dts: Fix I2C repeated start issue on Armada-38x
arm64: dts: marvell: fix interrupt-map property for Armada CP110 PCIe controller
arm64: dts: salvator-common: add 12V regulator to backlight
ARM: dts: sun6i: Fix endpoint IDs in second display pipeline
arm64: allwinner: a64: pine64: Use dcdc1 regulator for mmc0
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https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into fixes
Pull "Allwinner fixes for 4.14" from Maxime Ripard:
Two fixes, one for the A31 DRM binding, and one for a missing regulator on
the pine MMC controller.
* tag 'sunxi-fixes-for-4.14' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
ARM: dts: sun6i: Fix endpoint IDs in second display pipeline
arm64: allwinner: a64: pine64: Use dcdc1 regulator for mmc0
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Without the STDMAC clock enabled, the USB 2.0 hosts do not work.
This clock must be explicitly listed in the "clocks" property because
it is independent of the other clocks.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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Without the STDMAC clock enabled, the USB 2.0 hosts do not work.
This clock must be explicitly listed in the "clocks" property because
it is independent of the other clocks.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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Both Intel SDM and AMD APM mentioned that MCi_STATUS, when the register is
implemented, this register can be cleared by explicitly writing 0s to this
register. Writing 1s to this register will cause a general-protection
exception.
The mce is emulated in qemu, so just the guest attempts to write 1 to this
register should cause a #GP, this patch does it.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
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In my setup, EPT is not exposed to L1, the VPID capability is exposed and
can be observed by vmxcap tool in L1:
INVVPID supported yes
Individual-address INVVPID yes
Single-context INVVPID yes
All-context INVVPID yes
Single-context-retaining-globals INVVPID yes
However, the module parameter of VPID observed in L1 is always N, the
cpu_has_vmx_invvpid() check in L1 KVM fails since vmx_capability.vpid
is 0 and it is not read from MSR due to EPT is not exposed.
The VPID can be used to tag linear mappings when EPT is not enabled. However,
current logic just detects VPID capability if EPT is enabled, this patch
fixes it.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
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I can use vmxcap tool to observe "EPTP Switching yes" even if EPT is not
exposed to L1.
EPT switching is advertised unconditionally since it is emulated, however,
it can be treated as an extended feature for EPT and it should not be
advertised if EPT itself is not exposed. This patch fixes it.
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
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The latest kernel tree already can support more MediaTek platforms such as
MT2712 and MT7622, so additional descriptions for those platforms are added
and certain cleanups are also being made here.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
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It was decided 5-level paging is not going to be supported in XEN_PV.
Let's drop the dead code from the XEN_PV code.
Tested-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@suse.de>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170929140821.37654-6-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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CONFIG_XEN_PVH=y
Looks like we only need pre-built page tables in the CONFIG_XEN_PV=y and
CONFIG_XEN_PVH=y cases.
Let's not provide them for other configurations.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@suse.de>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170929140821.37654-5-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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We are going to support boot-time switching between 4- and 5-level
paging. For KASAN it means we cannot have different KASAN_SHADOW_OFFSET
for different paging modes: the constant is passed to gcc to generate
code and cannot be changed at runtime.
This patch changes KASAN code to use 0xdffffc0000000000 as shadow offset
for both 4- and 5-level paging.
For 5-level paging it means that shadow memory region is not aligned to
PGD boundary anymore and we have to handle unaligned parts of the region
properly.
In addition, we have to exclude paravirt code from KASAN instrumentation
as we now use set_pgd() before KASAN is fully ready.
[kirill.shutemov@linux.intel.com: clenaup, changelog message]
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@suse.de>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170929140821.37654-4-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Since Salvator-X[S] have a USB2.0 dual-role channel (CN9), this patch
adds dr_mode property for USB2.0 channel 0 (EHCI/OHCI and HS-USB)
as "otg".
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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We do not have tracepoints for sys_modify_ldt() because we define
it directly instead of using the normal SYSCALL_DEFINEx() macros.
However, there is a reason sys_modify_ldt() does not use the macros:
it has an 'int' return type instead of 'unsigned long'. This is
a bug, but it's a bug cemented in the ABI.
What does this mean? If we return -EINVAL from a function that
returns 'int', we have 0x00000000ffffffea in %rax. But, if we
return -EINVAL from a function returning 'unsigned long', we end
up with 0xffffffffffffffea in %rax, which is wrong.
To work around this and maintain the 'int' behavior while using
the SYSCALL_DEFINEx() macros, so we add a cast to 'unsigned int'
in both implementations of sys_modify_ldt().
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Brian Gerst <brgerst@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171018172107.1A79C532@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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