On Thu, 20 Sep 2018 23:04:30 +0100,
Pavel Machek wrote:
>
> On Tue 2018-08-07 10:33:26, Marc Zyngier wrote:
> > It recently came to light that userspace can execute WFI, and that
> > the arm64 kernel doesn trap this event. This sounds rather benign,
> > but the kernel should decide when it wants
On Thu, 20 Sep 2018 23:04:30 +0100,
Pavel Machek wrote:
>
> On Tue 2018-08-07 10:33:26, Marc Zyngier wrote:
> > It recently came to light that userspace can execute WFI, and that
> > the arm64 kernel doesn trap this event. This sounds rather benign,
> > but the kernel should decide when it wants
On Tue 2018-08-07 10:33:26, Marc Zyngier wrote:
> It recently came to light that userspace can execute WFI, and that
> the arm64 kernel doesn trap this event. This sounds rather benign,
> but the kernel should decide when it wants to wait for an interrupt,
> and not userspace.
>
> Let's trap WFI
On Tue 2018-08-07 10:33:26, Marc Zyngier wrote:
> It recently came to light that userspace can execute WFI, and that
> the arm64 kernel doesn trap this event. This sounds rather benign,
> but the kernel should decide when it wants to wait for an interrupt,
> and not userspace.
>
> Let's trap WFI
On Thu, 09 Aug 2018 13:47:01 +0100,
Dave Martin wrote:
>
> On Thu, Aug 09, 2018 at 01:38:12PM +0100, Will Deacon wrote:
> > On Thu, Aug 09, 2018 at 01:34:57PM +0100, Dave Martin wrote:
> > > On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> > > > On Tue, Aug 07, 2018 at
On Thu, 09 Aug 2018 13:47:01 +0100,
Dave Martin wrote:
>
> On Thu, Aug 09, 2018 at 01:38:12PM +0100, Will Deacon wrote:
> > On Thu, Aug 09, 2018 at 01:34:57PM +0100, Dave Martin wrote:
> > > On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> > > > On Tue, Aug 07, 2018 at
On Thu, Aug 09, 2018 at 01:38:12PM +0100, Will Deacon wrote:
> On Thu, Aug 09, 2018 at 01:34:57PM +0100, Dave Martin wrote:
> > On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> > > On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> > > > On 07/08/18 11:05, Dave
On Thu, Aug 09, 2018 at 01:38:12PM +0100, Will Deacon wrote:
> On Thu, Aug 09, 2018 at 01:34:57PM +0100, Dave Martin wrote:
> > On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> > > On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> > > > On 07/08/18 11:05, Dave
On Thu, Aug 09, 2018 at 01:34:57PM +0100, Dave Martin wrote:
> On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> > On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> > > On 07/08/18 11:05, Dave Martin wrote:
> > > > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc
On Thu, Aug 09, 2018 at 01:34:57PM +0100, Dave Martin wrote:
> On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> > On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> > > On 07/08/18 11:05, Dave Martin wrote:
> > > > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc
On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> > On 07/08/18 11:05, Dave Martin wrote:
> > > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> > >> It recently came to light that userspace can execute
On Wed, Aug 08, 2018 at 01:34:09PM +0100, Catalin Marinas wrote:
> On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> > On 07/08/18 11:05, Dave Martin wrote:
> > > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> > >> It recently came to light that userspace can execute
On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> On 07/08/18 11:05, Dave Martin wrote:
> > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> >> It recently came to light that userspace can execute WFI, and that
> >> the arm64 kernel doesn trap this event. This sounds
On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> On 07/08/18 11:05, Dave Martin wrote:
> > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> >> It recently came to light that userspace can execute WFI, and that
> >> the arm64 kernel doesn trap this event. This sounds
On Tue, Aug 07, 2018 at 01:12:03PM +0100, Robin Murphy wrote:
> On 07/08/18 11:30, Dave Martin wrote:
> >On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> >>On 07/08/18 11:05, Dave Martin wrote:
> >>>On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> It recently came
On Tue, Aug 07, 2018 at 01:12:03PM +0100, Robin Murphy wrote:
> On 07/08/18 11:30, Dave Martin wrote:
> >On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> >>On 07/08/18 11:05, Dave Martin wrote:
> >>>On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> It recently came
On 07/08/18 11:30, Dave Martin wrote:
On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
On 07/08/18 11:05, Dave Martin wrote:
On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
It recently came to light that userspace can execute WFI, and that
the arm64 kernel doesn
On 07/08/18 11:30, Dave Martin wrote:
On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
On 07/08/18 11:05, Dave Martin wrote:
On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
It recently came to light that userspace can execute WFI, and that
the arm64 kernel doesn
On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> On 07/08/18 11:05, Dave Martin wrote:
> > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> >> It recently came to light that userspace can execute WFI, and that
> >> the arm64 kernel doesn trap this event. This sounds
On Tue, Aug 07, 2018 at 11:24:34AM +0100, Marc Zyngier wrote:
> On 07/08/18 11:05, Dave Martin wrote:
> > On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> >> It recently came to light that userspace can execute WFI, and that
> >> the arm64 kernel doesn trap this event. This sounds
On 07/08/18 11:05, Dave Martin wrote:
> On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
>> It recently came to light that userspace can execute WFI, and that
>> the arm64 kernel doesn trap this event. This sounds rather benign,
>> but the kernel should decide when it wants to wait
On 07/08/18 11:05, Dave Martin wrote:
> On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
>> It recently came to light that userspace can execute WFI, and that
>> the arm64 kernel doesn trap this event. This sounds rather benign,
>> but the kernel should decide when it wants to wait
On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> It recently came to light that userspace can execute WFI, and that
> the arm64 kernel doesn trap this event. This sounds rather benign,
> but the kernel should decide when it wants to wait for an interrupt,
> and not userspace.
>
>
On Tue, Aug 07, 2018 at 10:33:26AM +0100, Marc Zyngier wrote:
> It recently came to light that userspace can execute WFI, and that
> the arm64 kernel doesn trap this event. This sounds rather benign,
> but the kernel should decide when it wants to wait for an interrupt,
> and not userspace.
>
>
It recently came to light that userspace can execute WFI, and that
the arm64 kernel doesn trap this event. This sounds rather benign,
but the kernel should decide when it wants to wait for an interrupt,
and not userspace.
Let's trap WFI and treat it as a way to yield the CPU to another
process.
It recently came to light that userspace can execute WFI, and that
the arm64 kernel doesn trap this event. This sounds rather benign,
but the kernel should decide when it wants to wait for an interrupt,
and not userspace.
Let's trap WFI and treat it as a way to yield the CPU to another
process.
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