Since the conversion to generic ptdump we see crashes on 64-bit:
BUG: Unable to handle kernel data access on read at 0xc0eeff7f
Faulting instruction address: 0xc045e5fc
Oops: Kernel access of bad area, sig: 11 [#1]
...
NIP __walk_page_range+0x2bc/0xce0
LR
In commit 1e688dd2a3d6 ("powerpc/bug: Provide better flexibility to
WARN_ON/__WARN_FLAGS() with asm goto") we changed WARN_ON(). Previously
it would take the warning condition, x, and double negate it before
converting the result to int, and passing that int to the underlying
inline asm. ie:
Christophe Leroy writes:
> Le 30/08/2021 à 13:55, Michael Ellerman a écrit :
>> Christophe Leroy writes:
>>> Le 30/08/2021 à 09:52, Michael Ellerman a écrit :
Christophe Leroy writes:
> Le 29/08/2021 à 20:55, Nathan Chancellor a écrit :
>> On Thu, Jul 08, 2021 at 04:49:43PM +,
On Tue, Aug 31, 2021 at 01:12:26PM +, Christophe Leroy wrote:
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 36b72d972568..a0fe69d8ec83 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -247,6 +247,7 @@ config PPC
> select HAVE_SOFTIRQ_ON_OWN_STACK
On Mon, 23 Aug 2021 08:24:20 + (UTC), Christophe Leroy wrote:
> In those hot functions that are called at every interrupt, any saved
> cycle is worth it.
>
> interrupt_exit_user_prepare() and interrupt_exit_kernel_prepare() are
> called from three places:
> - From entry_32.S
> - From
Add support for out-of-line static calls on PPC32. This change
improve performance of calls to global function pointers by
using direct calls instead of indirect calls.
The trampoline is initialy populated with a 'blr' or branch to target,
followed by an unreachable long jump sequence.
In order
On Tue, Aug 31, 2021 at 5:09 AM Ondrej Mosnacek wrote:
> On Sat, Jun 19, 2021 at 12:18 AM Dan Williams
> wrote:
> > On Wed, Jun 16, 2021 at 1:51 AM Ondrej Mosnacek wrote:
...
> > > diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
> > > index 2acc6173da36..c1747b6555c7 100644
> > > ---
On Thu, 26 Aug 2021 15:35:16 +0530, Srikar Dronamraju wrote:
> Changelog v2 -> v3:
> v2:
> https://lore.kernel.org/linuxppc-dev/20210821102535.169643-1-sri...@linux.vnet.ibm.com/t/#u
> Add patch 1: to drop dbg and numa=debug (Suggested by Michael Ellerman)
> Add patch 2: to convert printk to
On Thu, 26 Aug 2021 15:33:58 +0530, Srikar Dronamraju wrote:
> Changelog : v1 -> v2:
> v1:
> https://lore.kernel.org/linuxppc-dev/20210821092419.167454-1-sri...@linux.vnet.ibm.com/t/#u``
> [ patch 1: Updated to use DIV_ROUND_UP instead of max to handle more
> situations ]
> [ patch 2: updated
On Tue, 17 Aug 2021 22:51:54 +1000, Michael Ellerman wrote:
> Replace "cat file | grep pattern" with "grep pattern file", and quote a
> few variables. Together that fixes all shellcheck errors.
Applied to powerpc/next.
[1/1] powerpc/head_check: Fix shellcheck errors
Christophe Leroy writes:
> Le 31/08/2021 à 08:17, Daniel Axtens a écrit :
>> Hi Christophe,
>>
>>> Use bcl 20,31,+4 instead of bl in order to preserve link stack.
>>>
>>> See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
>>> in __get_datapage()") for details.
>>
>> From my
On Tue, Aug 31, 2021 at 5:08 AM Ondrej Mosnacek wrote:
> Can we move this forward somehow, please?
As mentioned previously, I can merge this via the SELinux tree but I
need to see some ACKs from the other subsystems first, not to mention
some resolution to the outstanding questions.
--
paul
On Wed, 25 Aug 2021 13:34:45 + (UTC), Christophe Leroy wrote:
> HMT_xxx macros are macros for adjusting thread priority
> (hardware multi-threading) are macros inherited from PPC64
> via commit 5f7c690728ac ("[PATCH] powerpc: Merged ppc_asm.h")
>
> Those instructions are pointless on PPC32,
On Tue, 17 Aug 2021 03:39:18 -0300, Leonardo Bras wrote:
> So far it's assumed possible to map the guest RAM 1:1 to the bus, which
> works with a small number of devices. SRIOV changes it as the user can
> configure hundreds VFs and since phyp preallocates TCEs and does not
> allow IOMMU pages
On Thu, 26 Aug 2021 21:56:50 +0930, Joel Stanley wrote:
> This enables the liteeth network device for microwatt which will be
> merged in v5.15.
>
> It also turns on some options so the microwatt defconfig can be used to
> boot a userspace with systemd.
>
> Joel Stanley (3):
>
On Tue, Aug 31, 2021 at 6:53 AM Paul Moore wrote:
>
> On Tue, Aug 31, 2021 at 5:09 AM Ondrej Mosnacek wrote:
> > On Sat, Jun 19, 2021 at 12:18 AM Dan Williams
> > wrote:
> > > On Wed, Jun 16, 2021 at 1:51 AM Ondrej Mosnacek
> > > wrote:
>
> ...
>
> > > > diff --git a/drivers/cxl/mem.c
On Tue, Aug 31, 2021 at 11:27:20PM +1000, Michael Ellerman wrote:
> In commit 1e688dd2a3d6 ("powerpc/bug: Provide better flexibility to
> WARN_ON/__WARN_FLAGS() with asm goto") we changed WARN_ON(). Previously
> it would take the warning condition, x, and double negate it before
> converting the
On Tue, Aug 31, 2021 at 11:51:51PM +1000, Michael Ellerman wrote:
> Since the conversion to generic ptdump we see crashes on 64-bit:
>
> BUG: Unable to handle kernel data access on read at 0xc0eeff7f
> Faulting instruction address: 0xc045e5fc
> Oops: Kernel access of bad
allmodconfig
powerpc allyesconfig
powerpc allmodconfig
powerpc allnoconfig
i386 randconfig-a005-20210831
i386 randconfig-a002-20210831
i386 randconfig-a003-20210831
i386
On Tue, Aug 31, 2021 at 2:58 PM Dan Williams wrote:
> On Tue, Aug 31, 2021 at 6:53 AM Paul Moore wrote:
> > On Tue, Aug 31, 2021 at 5:09 AM Ondrej Mosnacek wrote:
> > > On Sat, Jun 19, 2021 at 12:18 AM Dan Williams
> > > wrote:
> > > > On Wed, Jun 16, 2021 at 1:51 AM Ondrej Mosnacek
> > > >
Hello David,
Sorry for the delay, I did not get your mail because I was not CC'd
in your reply (you sent the mail just to the mailing list).
Replies bellow:
On Mon, 2021-08-30 at 10:48 -0700, David Christensen wrote:
> On 8/16/21 11:39 PM, Leonardo Bras wrote:
> > So far it's assumed possible
On 8/31/21 1:18 PM, Leonardo Brás wrote:
Hello David,
Sorry for the delay, I did not get your mail because I was not CC'd
in your reply (you sent the mail just to the mailing list).
Replies bellow:
On Mon, 2021-08-30 at 10:48 -0700, David Christensen wrote:
On 8/16/21 11:39 PM, Leonardo
On Tue, 2021-08-31 at 13:39 -0700, David Christensen wrote:
> >
> > This series allow Indirect DMA using DDW when available, which
> > usually
> > means bigger pagesizes and more TCEs, and so more DMA space.
>
> How is the mapping method selected? LPAR creation via the HMC, Linux
> kernel load
Hello Alexey,
On Fri, 2021-08-27 at 14:07 +1000, Alexey Kardashevskiy wrote:
> Since e1a1ef84cd07, pages for TCE tables for KVM guests are allocated
> only when needed. This allows skipping any update when clearing TCEs.
> This works mostly fine as TCE updates are handled when MMU is enabled.
>
Hi!
On Tue, Aug 31, 2021 at 11:27:20PM +1000, Michael Ellerman wrote:
> Nathan filed an LLVM bug [2], in which Eli Friedman explained that "if
> you pass a value of a type that's narrower than a register to an inline
> asm, the high bits are undefined". In this case we are passing a bool
> to the
On Tue, 31 Aug 2021 at 10:53, Peter Zijlstra wrote:
>
> On Tue, Aug 31, 2021 at 08:05:21AM +, Christophe Leroy wrote:
>
> > +#define ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name) \
> > + asm(".pushsection .text, \"ax\" \n" \
> > + ".align
Hi Christophe,
> Use bcl 20,31,+4 instead of bl in order to preserve link stack.
>
> See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
> in __get_datapage()") for details.
>From my understanding of that commit message, the change helps to keep
the link stack correctly balanced
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
next
branch HEAD: 57dbbe590f152e5e8a3ff8bf5ba163df34eeae0b powerpc/pseries/iommu:
Rename "direct window" to "dma window"
elapsed time: 6605m
configs tested: 158
configs skipped: 3
The following configs have been
Add support for out-of-line static calls on PPC32. This change
improve performance of calls to global function pointers by
using direct calls instead of indirect calls.
The trampoline is initialy populated with a 'blr' and 3 'nop'.
Then, depending on the target distance,
On Thu, Aug 26, 2021 at 03:33:59PM +0530, Srikar Dronamraju wrote:
> Aneesh reported a crash with a fairly recent upstream kernel when
> booting kernel whose commandline was appended with nr_cpus=2
>
> 1:mon> e
> cpu 0x1: Vector: 300 (Data Access) at [c8a67bd0]
> pc: c002557c:
Hi Jing,
Thanks for your patch.
The patch looks good, but looking at the output of `make coccicheck
M=arch/powerpc MODE=report`, it looks like there might be a few other
things that we might want to fix. Would it be worth trying to make the
arch/powerpc directory free from coccinelle warnings in
ppc_md.iommu_save() is not set anymore by any platform after
commit c40785ad305b ("powerpc/dart: Use a cachable DART").
So iommu_save() has become a nop and can be removed.
ppc_md.show_percpuinfo() is not set anymore by any platform after
commit 4350147a816b ("[PATCH] ppc64: SMU based macs
Commit d75d68cfef49 ("powerpc: Clean up obsolete code relating to
decrementer and timebase") made generic_suspend_enable_irqs() and
generic_suspend_disable_irqs() static.
Fold them into their only caller.
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/time.c | 22
Le 31/08/2021 à 08:17, Daniel Axtens a écrit :
Hi Christophe,
Use bcl 20,31,+4 instead of bl in order to preserve link stack.
See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
in __get_datapage()") for details.
From my understanding of that commit message, the change
On Fri, Jun 18, 2021 at 5:40 AM Paul Moore wrote:
> On Wed, Jun 16, 2021 at 4:51 AM Ondrej Mosnacek wrote:
> >
> > Commit 59438b46471a ("security,lockdown,selinux: implement SELinux
> > lockdown") added an implementation of the locked_down LSM hook to
> > SELinux, with the aim to restrict which
On Tue, Aug 31, 2021 at 08:05:21AM +, Christophe Leroy wrote:
> +#define ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name) \
> + asm(".pushsection .text, \"ax\" \n" \
> + ".align 4 \n" \
> +
On Sat, Jun 19, 2021 at 12:18 AM Dan Williams wrote:
> On Wed, Jun 16, 2021 at 1:51 AM Ondrej Mosnacek wrote:
> >
> > Commit 59438b46471a ("security,lockdown,selinux: implement SELinux
> > lockdown") added an implementation of the locked_down LSM hook to
> > SELinux, with the aim to restrict
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