On Fri, 1 Jul 2022 15:53:22 +0200, Ard Biesheuvel wrote:
> The 32-bit ARM kernel implements fixups on behalf of user space when
> using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
> aligned. This is not something that is supported by the architecture,
> but was done anyway to
On Mon, Sep 05, 2022 at 12:04:47PM +0200, Ard Biesheuvel wrote:
> On Wed, 31 Aug 2022 at 19:07, Catalin Marinas wrote:
> > On Fri, Jul 01, 2022 at 03:53:22PM +0200, Ard Biesheuvel wrote:
> > > +config COMPAT_ALIGNMENT_FIXUPS
> > > + bool "Fix up misaligned multi-word loads and stores in user s
On Wed, 31 Aug 2022 at 19:07, Catalin Marinas wrote:
>
> On Fri, Jul 01, 2022 at 03:53:22PM +0200, Ard Biesheuvel wrote:
> > The 32-bit ARM kernel implements fixups on behalf of user space when
> > using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
> > aligned. This is not so
On Fri, Jul 01, 2022 at 03:53:22PM +0200, Ard Biesheuvel wrote:
> The 32-bit ARM kernel implements fixups on behalf of user space when
> using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
> aligned. This is not something that is supported by the architecture,
> but was done an
On Fri, Aug 19, 2022 at 03:19:23PM +0200, LinAdmin wrote:
> Good night Andy
>
> Is it possible you never have heard of the Streisand effect?
>
> Regards
> LinAdmin
>
Hi LinAdmin,
As one of the people who wrote the FAQ for the debian-user mailing list,
not only have I heard of it, I specificall
Good night Andy
Is it possible you never have heard of the Streisand effect?
Regards
LinAdmin
On 18.08.22 18:58, Andrew M.A. Cater wrote:
> On Thu, Aug 18, 2022 at 05:21:19PM +0200, LinAdmin wrote:
>> I do know that you do not like my comment that 32bit on Pi4
>> is much more efficient than 64 B
On Thu, Aug 18, 2022 at 05:21:19PM +0200, LinAdmin wrote:
> I do know that you do not like my comment that 32bit on Pi4
> is much more efficient than 64 Bit ...
> Linadmin
>
>
Good afternoon, LinAdmin
It does appear to me that this comment is not directly relevant to this
message and might not b
I do know that you do not like my comment that 32bit on Pi4
is much more efficient than 64 Bit ...
Linadmin
On 17.08.22 11:47, Arnd Bergmann wrote:
> On Tue, Aug 16, 2022 at 10:29 PM Ard Biesheuvel wrote:
>> Thanks for chiming in.
>>
>> At this point, it is really up to the maintainers to decide
On Tue, Aug 16, 2022 at 10:29 PM Ard Biesheuvel wrote:
>
> Thanks for chiming in.
>
> At this point, it is really up to the maintainers to decide whether
> the maintenance burden is worth it. The code itself seems pretty
> uncontroversial afaict.
>
> Might other distros be in a similar situation?
On Tue, 16 Aug 2022 at 21:29, Aurelien Jarno wrote:
>
> Hi,
>
> On 2022-07-14 02:52, Wookey wrote:
> > On 2022-07-01 15:53 +0200, Ard Biesheuvel wrote:
> > > The 32-bit ARM kernel implements fixups on behalf of user space when
> > > using LDM/STM or LDRD/STRD instructions on addresses that are not
Hi,
On 2022-07-14 02:52, Wookey wrote:
> On 2022-07-01 15:53 +0200, Ard Biesheuvel wrote:
> > The 32-bit ARM kernel implements fixups on behalf of user space when
> > using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
> > aligned.
>
> > This feature is one of the remaining i
Pi 4 has much more throughput in 32-bit modes but the so
called experts of Debian decided to abandon it :-(
On 14.07.22 03:52, Wookey wrote:
> On 2022-07-01 15:53 +0200, Ard Biesheuvel wrote:
>> The 32-bit ARM kernel implements fixups on behalf of user space when
>> using LDM/STM or LDRD/STRD ins
On 2022-07-01 15:53 +0200, Ard Biesheuvel wrote:
> The 32-bit ARM kernel implements fixups on behalf of user space when
> using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
> aligned.
> This feature is one of the remaining impediments to being able to switch
> to 64-bit kerne
On 7/1/22 10:14, Ard Biesheuvel wrote:
The 32-bit ARM kernel implements fixups on behalf of user space when
using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
aligned. This is not something that is supported by the architecture,
but was done anyway to increase compatibility
On Fri, Jul 1, 2022 at 3:53 PM Ard Biesheuvel wrote:
>
> v2: - drop some obsolete comments
> - emit a perf alignment-fault event for every handled instruction
> - use arm64_skip_faulting_instruction() to get the correct behavior
> wrt IT state and single step
> - use types with c
The 32-bit ARM kernel implements fixups on behalf of user space when
using LDM/STM or LDRD/STRD instructions on addresses that are not 32-bit
aligned. This is not something that is supported by the architecture,
but was done anyway to increase compatibility with user space software,
which mostly ta
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