From: Aravinda Prasad
This series of patches add FWNMI support for KVM guests
on POWER.
Memory errors such as bit flips that cannot be corrected
by hardware is passed on to the kernel for handling
by raising machine check exception (an NMI). Upon such
machine check exceptions, if the address in
From: Aravinda Prasad
This patch introduces a new KVM capability to control
how KVM behaves on machine check exception (MCE).
Without this capability, KVM redirects machine check
exceptions to guest's 0x200 vector, if the address in
error belongs to the guest. With this capability KVM
causes a gu
From: Aravinda Prasad
Enhance KVM to cause a guest exit with KVM_EXIT_NMI
exit reason upon a machine check exception (MCE) in
the guest address space if the KVM_CAP_PPC_FWNMI
capability is enabled (instead of delivering a 0x200
interrupt to guest). This enables QEMU to build error
log and deliver
I’ve had mine apart many times (for memory upgrade, sensors for use in a
vehicle, etc. - http://mt.nfshost.com )
Tell me what to look for, and I’ll take as many hi-res pictures as you want.
Thanks,
Frank
> On Feb 4, 2017, at 10:32 PM, Hal Murray wrote:
>
> Mumble. If it were easier to take a
On Sat, 2017-02-04 at 16:19 -0800, Fred Wright wrote:
> On Tue, 31 Jan 2017, Hal Murray wrote:
>
> > > b...@kernel.crashing.org said:
> > > Right, we just use the value provided by Open Firmware. Any chance you can
>
> That seems inconsistent with the following comment in
> arch/powerpc/kernel/ti
This fixes the typo about the _PAGE_PTE in set_pte_at() by changing
"tryint" to "trying to".
Fixes: 6a119eae942 ("powerpc/mm: Add a _PAGE_PTE bit")
Signed-off-by: Gavin Shan
---
arch/powerpc/mm/pgtable.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/powerpc/mm/pgtab
Commit 14a3ae34bfd0 ("cxl: Prevent read/write to AFU config space while AFU
not configured") introduced a rwsem to fix an invalid memory access that
occurred when someone attempts to access the config space of an AFU on a
vPHB whilst the AFU is deconfigured, such as during EEH recovery.
It turns o
On 27/01/17 11:57, Andrew Donnellan wrote:
On 27/01/17 11:40, Michael Ellerman wrote:
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/14a3ae34bfd0bcb1cc12d55b06a858
Will fix the remaining locking issue in a follow up patch...
Stable team - please make sure this doesn't go
This patch gets rid of the the TLB multihits observed in the lab.
Sadly it does disable whatever remaining optimizations we had for
TLB invalidations. It fixes 2 problems:
- We do sadly need to invalidate in radix__pte_update() even when
the new pte is clear because what might happen otherwise i
Three tiny changes to the ERAT flushing logic: First don't make
it depend on DD1. It hasn't been decided yet but we might run
DD2 in a mode that also requires explicit flushes for performance
reasons so make it unconditional. We also add a missing isync, and
finally remove the flush from _tlbiel_va
On Mon, Feb 06, 2017 at 10:22:01AM +1100, Benjamin Herrenschmidt wrote:
> > On the plus side, that means that the values are guaranteed not
> > to be core-specific. On the minus side, it means that its count rate is
> > lower, and it's sufficiently "distant" that accessing it is somewhat more
>
Gavin Shan writes:
> This fixes the typo about the _PAGE_PTE in set_pte_at() by changing
> "tryint" to "trying to".
>
> Fixes: 6a119eae942 ("powerpc/mm: Add a _PAGE_PTE bit")
I guess this is not needed. We add that when we want to hint whether the
patch needs backporting.
> Signed-off-by: Gav
On 31/01/2017 5:11 PM, Michael Ellerman wrote:
Rui Teng writes:
The offset of hugepage block will not be 16G, if the expected
page is more than one. Calculate the totol size instead of the
hardcode value.
I assume you found this by code inspection and not by triggering an
actual bug?
Yes,
These are common on bare metal machines, so put them in the defconfig.
This adds 216KB to the vmlinux size
Signed-off-by: Michael Neuling
---
arch/powerpc/configs/powernv_defconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/configs/powernv_defconfig
b/ar
This enables BCC (https://github.com/iovisor/bcc) on powernv.
This adds 225KB to the vmlinux size.
Signed-off-by: Michael Neuling
---
arch/powerpc/configs/powernv_defconfig | 5 +
1 file changed, 5 insertions(+)
diff --git a/arch/powerpc/configs/powernv_defconfig
b/arch/powerpc/configs/po
On Mon, Feb 06, 2017 at 08:03:57AM +0530, Aneesh Kumar K.V wrote:
>Gavin Shan writes:
>
>> This fixes the typo about the _PAGE_PTE in set_pte_at() by changing
>> "tryint" to "trying to".
>>
>> Fixes: 6a119eae942 ("powerpc/mm: Add a _PAGE_PTE bit")
>
>I guess this is not needed. We add that when we
Recent versions of OPAL can provide names for the various OPAL interrupts,
so let's use them. This also modernises the code that fetches the
interrupt array to use the helpers provided by the generic code instead
of hand-parsing the property.
Signed-off-by: Benjamin Herrenschmidt
---
arch/powerp
> Tell me what to look for, and Iâll take as many hi-res pictures as you want.
I'm looking for the frequency printed on the oscillator/crystal.
Here is a picture with several examples:
https://en.wikipedia.org/wiki/File:Crystal_Packages.jpg
The row of Oscillators is most likely. They also c
> -Original Message-
> From: Leo Li [mailto:pku@gmail.com]
> Sent: Friday, February 03, 2017 2:12 AM
> To: Y.T. Tang
> Cc: Scott Wood ; Michael Turquette
> ; Russell King ;
> Stephen Boyd ; Viresh Kumar
> ; Rafael J. Wysocki ; linux-
> c...@vger.kernel.org; linux...@vger.kernel.org; li
>>> I've seen it on tip. It looks like hot unplug goes really slow when
>>> there's running tasks on the CPU being taken down.
>>>
>>> What I did was something like:
>>>
>>> taskset -p $((1<<1)) $$
>>> for ((i=0; i<20; i++)) do while :; do :; done & done
>>>
>>> taskset -p $((1<<0)) $$
>>>
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