On Wed, 2021-09-15 at 16:31 +0200, Christophe Leroy wrote:
> dcbz instruction shouldn't be used on non-cached memory. Using
> it on non-cached memory can result in alignment exception and
> implies a heavy handling.
>
> Instead of silentely emulating the instruction and resulting in high
> perform
On Thu, 2021-09-16 at 17:15 +1000, Benjamin Herrenschmidt wrote:
> On Wed, 2021-09-15 at 16:31 +0200, Christophe Leroy wrote:
> > dcbz instruction shouldn't be used on non-cached memory. Using
> > it on non-cached memory can result in alignment exception and
> > implies a heavy handling.
> >
> > I
Le 16/09/2021 à 09:16, Benjamin Herrenschmidt a écrit :
On Thu, 2021-09-16 at 17:15 +1000, Benjamin Herrenschmidt wrote:
On Wed, 2021-09-15 at 16:31 +0200, Christophe Leroy wrote:
dcbz instruction shouldn't be used on non-cached memory. Using
it on non-cached memory can result in alignment e
On Wed, Sep 15, 2021 at 07:18:34PM +0200, Christophe Leroy wrote:
> Could you please provide more explicit explanation why inlining such an
> helper is considered as bad practice and messy ?
Because now we get architectures to all subly differ. Look at the mess
for ioremap and the ioremap* varian
On Wed, Sep 15, 2021 at 02:56:52PM +0200, Geert Uytterhoeven wrote:
> Commit b1442c55ce8977aa ("serial: 8250: extend compile-test coverage")
> added compile-test support to the Freescale 16550 driver. However, as
> SERIAL_8250_FSL is an invisible symbol, merely enabling COMPILE_TEST now
> enables
Hi Johan,
On Thu, Sep 16, 2021 at 10:46 AM Johan Hovold wrote:
> On Wed, Sep 15, 2021 at 02:56:52PM +0200, Geert Uytterhoeven wrote:
> > Commit b1442c55ce8977aa ("serial: 8250: extend compile-test coverage")
> > added compile-test support to the Freescale 16550 driver. However, as
> > SERIAL_825
The ABI files are meant to be parsed via a script (scripts/get_abi.pl).
A new improvement on it will allow it to help to detect if an ABI description
is missing, or if the What: field won't match the actual location of the symbol.
In order for get_abi.pl to convert What: into regex, changes are n
The What: field should have just the location of the ABI.
Anything else should be inside the description.
This fixes its parsing by get_abi.pl script.
Acked-by: Andrew Donnellan
Signed-off-by: Mauro Carvalho Chehab
---
Documentation/ABI/testing/sysfs-class-cxl | 15 ++-
1 file chan
On Thu, Sep 16, 2021 at 10:55:49AM +0200, Geert Uytterhoeven wrote:
> Hi Johan,
>
> On Thu, Sep 16, 2021 at 10:46 AM Johan Hovold wrote:
> > On Wed, Sep 15, 2021 at 02:56:52PM +0200, Geert Uytterhoeven wrote:
> > > Commit b1442c55ce8977aa ("serial: 8250: extend compile-test coverage")
> > > added
Hi Stefano,
> Also, Option 1 listed in the webpage seems to be a lot better. Any
> reason you can't do that? Because that option both solves the problem
> and increases performance.
Yes, Option 1 is probably more efficient.
But I use another platform under Xen without DMA adjustment functionality
Peter Zijlstra writes:
> On Tue, Sep 14, 2021 at 08:40:38PM +1000, Michael Ellerman wrote:
>> Peter Zijlstra writes:
>
>> > I'm thinking we ought to keep hops as steps along the NUMA fabric, with
>> > 0 hops being the local node. That only gets us:
>> >
>> > L2, remote=0, hops=HOPS_0 -- our L2
>
Christoph Hellwig writes:
> On Wed, Sep 15, 2021 at 07:18:34PM +0200, Christophe Leroy wrote:
>> Could you please provide more explicit explanation why inlining such an
>> helper is considered as bad practice and messy ?
>
> Because now we get architectures to all subly differ. Look at the mess
>
Hi, thanks for this patch, once the Wii U platform will be added it will
need an additional test for WIIU, but for now this is:
Reviewed-by: Emmanuel Gil Peyrot
On Tue, Sep 14, 2021 at 11:29:49AM +0200, Geert Uytterhoeven wrote:
> The Nintendo Wii and Wii U OTP is only present on Nintendo Wii an
Building Linux for ppc64le with Ubuntu clang version 12.0.0-3ubuntu1~21.04.1
shows the warning below.
arch/powerpc/boot/inffast.c:20:1: warning: unused function
'get_unaligned16' [-Wunused-function]
get_unaligned16(const unsigned short *p)
^
1 warning generated.
Fix it, by moving
From: Christophe Leroy
> Sent: 16 September 2021 08:24
>
> Le 16/09/2021 à 09:16, Benjamin Herrenschmidt a écrit :
> > On Thu, 2021-09-16 at 17:15 +1000, Benjamin Herrenschmidt wrote:
> >> On Wed, 2021-09-15 at 16:31 +0200, Christophe Leroy wrote:
> >>> dcbz instruction shouldn't be used on non-ca
On Tue, Sep 14, 2021 at 02:10:29PM +0200, Ard Biesheuvel wrote:
> The CPU field will be moved back into thread_info even when
> THREAD_INFO_IN_TASK is enabled, so add it back to arm64's definition of
> struct thread_info.
>
> Signed-off-by: Ard Biesheuvel
Acked-by: Catalin Marinas
dcbz instruction shouldn't be used on non-cached memory. Using
it on non-cached memory can result in alignment exception and
implies a heavy handling.
Instead of silentely emulating the instruction and resulting in high
performance degradation, warn whenever an alignment exception is
taken in kern
Hi Paul,
On 9/16/2021 7:22 AM, Paul Menzel wrote:
Building Linux for ppc64le with Ubuntu clang version 12.0.0-3ubuntu1~21.04.1
shows the warning below.
arch/powerpc/boot/inffast.c:20:1: warning: unused function
'get_unaligned16' [-Wunused-function]
get_unaligned16(const unsigned shor
On Wed, Sep 15, 2021 at 10:26:06AM -0700, Kuppuswamy, Sathyanarayanan wrote:
> I have a Intel variant patch (please check following patch). But it includes
> TDX changes as well. Shall I move TDX changes to different patch and just
> create a separate patch for adding intel_cc_platform_has()?
Yes,
From: Jiri Slaby
[ Upstream commit 7ccbdcc4d08a6d7041e4849219bbb12ffa45db4c ]
The alloc_tty_driver failure is handled gracefully in hvsi_init. But
tty_register_driver is not. panic is called if that one fails.
So handle the failure of tty_register_driver gracefully too. This will
keep at least
From: Jiri Slaby
[ Upstream commit 7ccbdcc4d08a6d7041e4849219bbb12ffa45db4c ]
The alloc_tty_driver failure is handled gracefully in hvsi_init. But
tty_register_driver is not. panic is called if that one fails.
So handle the failure of tty_register_driver gracefully too. This will
keep at least
From: Jiri Slaby
[ Upstream commit 7ccbdcc4d08a6d7041e4849219bbb12ffa45db4c ]
The alloc_tty_driver failure is handled gracefully in hvsi_init. But
tty_register_driver is not. panic is called if that one fails.
So handle the failure of tty_register_driver gracefully too. This will
keep at least
On 9/16/21 8:02 AM, Borislav Petkov wrote:
On Wed, Sep 15, 2021 at 10:26:06AM -0700, Kuppuswamy, Sathyanarayanan wrote:
I have a Intel variant patch (please check following patch). But it includes
TDX changes as well. Shall I move TDX changes to different patch and just
create a separate patc
In the old days, when we didn't have kernel userspace access
protection and had set_fs(), it was wise to use __get_user()
and friends to read kernel memory.
Nowadays, get_user() and put_user() are granting userspace access and
are exclusively for userspace access.
Convert single step emulation fu
Hi Paul,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v5.15-rc1 next-20210916]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as doc
Hi Paul,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v5.15-rc1 next-20210916]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as doc
On Wed, Sep 15, 2021 at 05:43:44PM +0200, Vincent Guittot wrote:
> On Sat, 11 Sept 2021 at 03:19, Ricardo Neri
> wrote:
> >
> > When deciding to pull tasks in ASYM_PACKING, it is necessary not only to
> > check for the idle state of the destination CPU, dst_cpu, but also of
> > its SMT siblings.
>
Le 16/09/2021 à 16:22, Paul Menzel a écrit :
Building Linux for ppc64le with Ubuntu clang version 12.0.0-3ubuntu1~21.04.1
shows the warning below.
arch/powerpc/boot/inffast.c:20:1: warning: unused function
'get_unaligned16' [-Wunused-function]
get_unaligned16(const unsigned short *
Hi Ganesh,
> We queue an irq work for deferred processing of mce event
> in realmode mce handler, where translation is disabled.
> Queuing of the work may result in accessing memory outside
> RMO region, such access needs the translation to be enabled
> for an LPAR running with hash mmu else the k
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