On Wed, Sep 27, 2017 at 01:38:09PM +1000, Michael Ellerman wrote:
> Segher Boessenkool writes:
> > A lot of userspace code uses V*X, more and more with newer CPUs and newer
> > compiler versions. If you already paid the price for using vector
> > registers you do not need to again :-)
>
> True,
From: Segher Boessenkool
> Sent: 27 September 2017 10:28
...
> You also need nasty code to deal with the start and end of strings, with
> conditional branches and whatnot, which quickly overwhelms the benefit
> of using vector registers at all. This tradeoff also changes with newer
> ISA versions.
We were aggressive with splitting regions and missed the case
when _stext and __init_begin completely overlap addr and addr+mapping.
This patch fixes that case and allows us to keep the largest possible
mapping through the overlap. The patch also simplies the check
into a function
Fixes: 7614ff3
This patch disables STRICT_RWX for power9 DD1 machines
where due to some limitations with the way we do tlb
updates, we clear the TLB entry of the text that's doing
the update to kernel text and that does lead to a
crash.
Fixes: 7614ff3 ("powerpc/mm/radix: Implement STRICT_RWX/mark_rodata_ro() for
On Thu, 2017-09-07 at 06:35:44 UTC, Benjamin Herrenschmidt wrote:
> Remove the post_init callback which is only used
> by powernv, we can just call it explicitly from
> the powernv code.
>
> This partially kills the ability to "disable" eeh at
> runtime via debugfs as this was calling that same
>
On Fri, 2017-09-15 at 05:25:48 UTC, Michael Neuling wrote:
> POWER9 DD2.1 and earlier has an issue where some cache inhibited
> vector load will return bad data. The workaround is two part, one
> firmware/microcode part triggers HMI interrupts when hitting such
> loads, the other part is this patch
On Mon, 2017-09-25 at 17:26 +, York Sun wrote:
> On 09/25/2017 09:55 AM, Joakim Tjernlund wrote:
> > We got some "broken" boards(mpx8321) where UART RX is held low(BREAK)
> > There we get a few:
> >serial8250: too much work for irq18
> > and the board freezes.
> >
> > Looking inte to drive
On Tuesday 12 September 2017 09:31 PM, Michal Suchanek wrote:
With fadump (dump capture) kernel booting like a regular kernel, it needs
almost the same amount of memory to boot as the production kernel, which is
unwarranted for a dump capture kernel. But with no option to disable some
of the un
On Tuesday 12 September 2017 09:31 PM, Michal Suchanek wrote:
With fadump (dump capture) kernel booting like a regular kernel, it needs
almost the same amount of memory to boot as the production kernel, which is
unwarranted for a dump capture kernel. But with no option to disable some
of the un
On Tue, 26 Sep 2017 20:43:28 + (UTC)
Mathieu Desnoyers wrote:
> - On Sep 26, 2017, at 1:51 PM, Mathieu Desnoyers
> mathieu.desnoy...@efficios.com wrote:
>
> > Provide a new command allowing processes to register their intent to use
> > the private expedited command.
> >
>
> I missed
From: Tom Lendacky
In prep for a new function that will need additional resource information
during the resource walk, update the resource walk callback to pass the
resource structure. Since the current callback start and end arguments
are pulled from the resource structure, the callback functio
On 09/27/2017 04:03 AM, Joakim Tjernlund wrote:
> On Mon, 2017-09-25 at 17:26 +, York Sun wrote:
>> On 09/25/2017 09:55 AM, Joakim Tjernlund wrote:
>>> We got some "broken" boards(mpx8321) where UART RX is held low(BREAK)
>>> There we get a few:
>>> serial8250: too much work for irq18
>>> a
On (09/27/17 16:26), Michael Ellerman wrote:
[..]
> > Tested-by: Santosh Sivaraj
>
> Thanks Santosh.
>
> I also gave it a quick spin. I'll give you an ack for the powerpc changes.
>
> Acked-by: Michael Ellerman (powerpc)
>
>
> Thanks for cleaning this up Sergey.
thanks!
-ss
On Tue, Sep 26, 2017 at 04:47:04PM +1000, Sam Bobroff wrote:
> In KVM's XICS-on-XIVE emulation, kvmppc_xive_get_xive() returns the
> value of state->guest_server as "server". However, this value is not
> set by it's counterpart kvmppc_xive_set_xive(). When the guest uses
> this interface to migrate
Hi Michael,
On Wed, Sep 27, 2017 at 01:38:09PM +1000, Michael Ellerman wrote:
> Segher Boessenkool writes:
>
> > On Tue, Sep 26, 2017 at 03:34:36PM +1000, Michael Ellerman wrote:
> >> Cyril Bur writes:
> >> > This was written for userspace which doesn't have to explicitly enable
> >> > VMX in or
On Wed, Sep 27, 2017 at 09:43:44AM +, David Laight wrote:
> From: Segher Boessenkool
> > Sent: 27 September 2017 10:28
> ...
> > You also need nasty code to deal with the start and end of strings, with
> > conditional branches and whatnot, which quickly overwhelms the benefit
> > of using vecto
Clearing very big IOMMU tables can trigger soft lockups. This adds
cond_resched() for every second spend in the loop.
Signed-off-by: Alexey Kardashevskiy
---
The testcase is POWER9 box with 264GB guest, 4 VFIO devices from
independent IOMMU groups, 64K IOMMU pages. This configuration produces
43
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