linux-toradex.git/arch/powerpc/kernel/setup-common.c, branch v4.9.121

powerpc: Don't preempt_disable() in show_cpuinfo()

2018-05-22T14:57:56+00:00

commit 349524bc0da698ec77f2057cf4a4948eb6349265 upstream.

This causes warnings from cpufreq mutex code. This is also rather
unnecessary and ineffective. If we really want to prevent concurrent
unplug, we could take the unplug read lock but I don't see this being
critical.

Fixes: cd77b5ce208c ("powerpc/powernv/cpufreq: Fix the frequency read by /proc/cpuinfo")
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman 
Acked-by: Michal Suchanek 
Signed-off-by: Greg Kroah-Hartman

powerpc/iommu: Pass mm_struct to init/cleanup helpers

2017-03-22T11:43:37+00:00

[ Upstream commit 88f54a3581eb9deaa3bd1aade40aef266d782385 ]

We are going to get rid of @current references in mmu_context_boos3s64.c
and cache mm_struct in the VFIO container. Since mm_context_t does not
have reference counting, we will be using mm_struct which does have
the reference counter.

This changes mm_iommu_init/mm_iommu_cleanup to receive mm_struct rather
than mm_context_t (which is embedded into mm).

This should not cause any behavioral change.

Signed-off-by: Alexey Kardashevskiy 
Reviewed-by: David Gibson 
Signed-off-by: Michael Ellerman 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

powerpc: Call chained reset handlers during reset

2016-09-25T05:06:40+00:00

Call out to all restart handlers that were added via
register_restart_handler() API when restarting the machine.

Signed-off-by: Andrey Smirnov 
Signed-off-by: Scott Wood

powerpc: Factor out common code in setup-common.c

2016-09-25T05:06:39+00:00

Factor out a small bit of common code in machine_restart(),
machine_power_off() and machine_halt().

Signed-off-by: Andrey Smirnov 
Signed-off-by: Scott Wood

powerpc: Move cpu_has_feature() to a separate file

2016-08-01T01:15:03+00:00

We plan to use jump label for cpu_has_feature(). In order to implement
this we need to include the linux/jump_label.h in asm/cputable.h.

Unfortunately if we do that it leads to an include loop. The root of the
problem seems to be that reg.h needs cputable.h (for CPU_FTRs), and then
cputable.h via jump_label.h eventually pulls in hw_irq.h which needs
reg.h (for MSR_EE).

So move cpu_has_feature() to a separate file on its own.

Signed-off-by: Kevin Hao 
Signed-off-by: Aneesh Kumar K.V 
[mpe: Rename to cpu_has_feature.h and flesh out change log]
Signed-off-by: Michael Ellerman

powerpc: Merge 32-bit and 64-bit setup_arch()

2016-07-21T09:17:46+00:00

There is little enough differences now.

mpe: Add a/p/k/setup.h to contain the prototypes and empty versions of
functions we need, rather than using weak functions. Add a few other
empty versions to avoid as many #ifdefs as possible in the code.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Re-order setup_panic()

2016-07-21T09:17:23+00:00

Do it right after probe_machine() since it's about testing ppc_md,
and put the test in the common code.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Ensure that ppc_md is empty before probing for machine type

2016-07-21T08:59:21+00:00

Anything in there will be overwritten, so it helps catching nasty
bugs if we check that it's indeed full of NULL's before we do so.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Don't test for machine type in smp_setup_cpu_maps()

2016-07-13T08:15:38+00:00

The subsequent test for RTAS along with the LPAR test are sufficient

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Remove unnecessary CONFIG_SMP #ifdefs

2016-05-11T11:54:01+00:00

The code in machine_restart/power_off/halt() includes #ifdefs around
calls to smp_send_stop(), however these are not required as
include/linux/smp.h includes an empty version of this function for
CONFIG_SMP=n builds.

Signed-off-by: Chris Smart 
Signed-off-by: Michael Ellerman