On Thu, Jun 04, 2020 at 08:42:52AM -0700, Andy Lutomirski wrote:
> x86 is not an architecture. x86 is a gauntlet through which operating
> system developers must run.
That made my day :-)
> I think we can tolerate this particular mess -- can't we just say that
> a BUS LOCK DEBUG EXCEPTION is fa
On Thu, Jun 4, 2020 at 6:35 AM Peter Zijlstra wrote:
>
> On Thu, Jun 04, 2020 at 03:29:26PM +0200, Paolo Bonzini wrote:
> > On 04/06/20 15:25, Peter Zijlstra wrote:
> > > It being enabled through IA32_DEBUGCTL instead of through DR7 means that
> > > the current code doesn't disable it and this the
On Thu, Jun 04, 2020 at 03:29:26PM +0200, Paolo Bonzini wrote:
> On 04/06/20 15:25, Peter Zijlstra wrote:
> > It being enabled through IA32_DEBUGCTL instead of through DR7 means that
> > the current code doesn't disable it and this then means we can have
> > nested #DB again.
>
> /me bangs head on
On 04/06/20 15:25, Peter Zijlstra wrote:
> It being enabled through IA32_DEBUGCTL instead of through DR7 means that
> the current code doesn't disable it and this then means we can have
> nested #DB again.
/me bangs head on door
> Who sodding throught this was a good idea ?! What happened to #AC
On Wed, Jun 03, 2020 at 08:18:44PM +0100, Andrew Cooper wrote:
> Well that didn't last long...
>
> The new ISE (rev 39, published today) introduces BUS LOCK DEBUG
> EXCEPTION which is now a second inverted polarity sticky bit (bit 11) in
> %dr6.
>
> This one is liable to get more traction than R
On 22/05/2020 22:17, Peter Zijlstra wrote:
> On Fri, May 22, 2020 at 08:20:15AM +0100, Andrew Cooper wrote:
>> Apologies for opening a related can of worms.
>>
>> The new debug_enter() has propagated a pre-existing issue forward,
>> ultimately caused by bad advice in the SDM.
>>
>> Because the RTM
On Thu, May 21, 2020 at 1:31 PM Thomas Gleixner wrote:
>
> Folks!
>
> This is V9 of the rework series. V7 and V8 were never posted but I used the
> version numbers for tags while fixing up 0day complaints. The last posted
> version was V6 which can be found here:
The whole pile is Acked-by: Andy
On Fri, May 22, 2020 at 08:20:15AM +0100, Andrew Cooper wrote:
> Apologies for opening a related can of worms.
>
> The new debug_enter() has propagated a pre-existing issue forward,
> ultimately caused by bad advice in the SDM.
>
> Because the RTM status bit in DR6 has inverted polarity, writing
Thomas Gleixner writes:
> Boris Ostrovsky writes:
>> On 5/21/20 4:05 PM, Thomas Gleixner wrote:
>>>
>>> The full series is available from:
>>>
>>> git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git
>>> entry-v9-the-rest
>>
>>
>> Did you mean noinstr-v9-the-rest? I don't see entry-v9-
Boris Ostrovsky writes:
> On 5/21/20 4:05 PM, Thomas Gleixner wrote:
>>
>> The full series is available from:
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git
>> entry-v9-the-rest
>
>
> Did you mean noinstr-v9-the-rest? I don't see entry-v9-the-rest tag.
Bah. Yes.
> (Also, t
On 5/21/20 4:05 PM, Thomas Gleixner wrote:
>
> The full series is available from:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git
> entry-v9-the-rest
Did you mean noinstr-v9-the-rest? I don't see entry-v9-the-rest tag.
(Also, this series as posted probably won't build. At le
On 21/05/2020 21:05, Thomas Gleixner wrote:
> Folks!
>
> This is V9 of the rework series. V7 and V8 were never posted but I used the
> version numbers for tags while fixing up 0day complaints. The last posted
> version was V6 which can be found here:
>
> https://lore.kernel.org/r/20200515234547.7
Folks!
This is V9 of the rework series. V7 and V8 were never posted but I used the
version numbers for tags while fixing up 0day complaints. The last posted
version was V6 which can be found here:
https://lore.kernel.org/r/20200515234547.710474...@linutronix.de
The V9 leftover series is based
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