Le 09/09/2020 à 08:04, Aneesh Kumar K.V a écrit :
Christophe Leroy writes:
search_exception_tables() is an heavy operation, we have to avoid it.
When KUAP is selected, we'll know the fault has been blocked by KUAP.
Otherwise, it behaves just as if the address was already in the TLBs
and no
On 07/08/2020 20:18, Cédric Le Goater wrote:
> When a passthrough IO adapter is removed from a pseries machine using
> hash MMU and the XIVE interrupt mode, the POWER hypervisor expects the
> guest OS to clear all page table entries related to the adapter. If
> some are still present, the RTAS c
Gerald Schaefer writes:
> On Fri, 4 Sep 2020 18:01:15 +0200
> Gerald Schaefer wrote:
>
> [...]
>>
>> BTW2, a quick test with this change (so far) made the issues on s390
>> go away:
>>
>> @@ -1069,7 +1074,7 @@ static int __init debug_vm_pgtable(void)
>> spin_unlock(ptl);
>>
>> #ifnde
Christophe Leroy writes:
> search_exception_tables() is an heavy operation, we have to avoid it.
> When KUAP is selected, we'll know the fault has been blocked by KUAP.
> Otherwise, it behaves just as if the address was already in the TLBs
> and no fault was generated.
>
> Signed-off-by: Christop
On 08.09.20 22:10, David Hildenbrand wrote:
We soon want to pass flags, e.g., to mark added System RAM resources.
mergeable. Prepare for that.
This patch is based on a similar patch by Oscar Salvador:
https://lkml.kernel.org/r/20190625075227.15193-3-osalva...@suse.de
Acked-by: Wei Liu
Cc: And
On Mon, 07 Sep 2020 21:27:08 PDT (-0700), masahi...@kernel.org wrote:
There was a request to preprocess the module linker script like we
do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512)
The difference between vmlinux.lds and module.lds is that the latter
is needed for external modul
On Mon, 24 Aug 2020 21:55:57 -0700, Joe Perches wrote:
> There are many comma separated statements in the kernel.
> See:https://lore.kernel.org/lkml/alpine.DEB.2.22.394.2008201856110.2524@hadrien/
>
> Convert the comma separated statements that are in if/do/while blocks
> to use braces and semico
randconfig-a005-20200907
x86_64 randconfig-a001-20200907
x86_64 randconfig-a002-20200907
i386 randconfig-a004-20200908
i386 randconfig-a005-20200908
i386 randconfig-a006-20200908
i386 randconfig-a002-20200908
i386
-20200907
x86_64 randconfig-a005-20200907
x86_64 randconfig-a001-20200907
x86_64 randconfig-a002-20200907
i386 randconfig-a004-20200908
i386 randconfig-a005-20200908
i386 randconfig-a006-20200908
i386
randconfig-a004-20200908
i386 randconfig-a005-20200908
i386 randconfig-a006-20200908
i386 randconfig-a002-20200908
i386 randconfig-a001-20200908
i386 randconfig-a003-20200908
i386
andconfig-a004-20200907
x86_64 randconfig-a003-20200907
x86_64 randconfig-a005-20200907
x86_64 randconfig-a001-20200907
x86_64 randconfig-a002-20200907
i386 randconfig-a004-20200908
i386 randconfig-a005-20200908
i386
Tyrel,
> Update ibmvfc.h structs to use the preferred __packed and __aligned()
> attribute macros defined in include/linux/compiler_attributes.h in place
> of __attribute__().
Applied 1+2 to my 5.10 staging tree. Thanks!
--
Martin K. Petersen Oracle Linux Engineering
Christophe Leroy writes:
> Le 08/09/2020 à 14:58, Michael Ellerman a écrit :
>> When we added the VDSO32 kconfig symbol, which controls building of
>> the 32-bit VDSO, we made it depend on CPU_BIG_ENDIAN (for 64-bit).
>>
>> That was because back then COMPAT was always enabled for 64-bit, so
>> de
On Tue, Jun 30, 2020 at 01:47:39PM -0300, Thadeu Lima de Souza Cascardo wrote:
> As pointed out by Michael Ellerman, the ptrace ABI on powerpc does not
> allow or require the return code to be set on syscall entry when
> skipping the syscall. It will always return ENOSYS and the return code
> must
On Sat, 22 Aug 2020 17:40:45 +0200, Christian Lamparter wrote:
> Meraki was founded in 2006. The start-up quickly rose to prominence
> by being based in part on the MIT Roofnet Project.
> In December 2012, Cisco Systems, Inc. bought Meraki.
> The "Meraki" branding is still around to this day.
>
>
On Mon, Sep 07, 2020 at 04:35:40PM +0530, Vaibhav Jain wrote:
> The newly introduced 'perf_stats' attribute uses the default access
> mode of 0444 letting non-root users access performance stats of an
> nvdimm and potentially force the kernel into issuing large number of
> expensive HCALLs. Since t
We soon want to pass flags, e.g., to mark added System RAM resources.
mergeable. Prepare for that.
This patch is based on a similar patch by Oscar Salvador:
https://lkml.kernel.org/r/20190625075227.15193-3-osalva...@suse.de
Acked-by: Wei Liu
Cc: Andrew Morton
Cc: Michal Hocko
Cc: Dan Williams
Hello,
On Tue, Sep 8, 2020 at 9:12 AM Michael Ellerman wrote:
> Christian Lamparter writes:
> > On 2020-06-23 15:03, Michael Ellerman wrote:
> >> With CONFIG_OF_ALL_DTBS=y, as set by eg. allmodconfig, we see lots of
> >> warnings about our dts files, such as:
> >>
> >>arch/powerpc/boot/dts/g
On Tue, 8 Sep 2020 07:30:50 -0700
Dave Hansen wrote:
> On 9/7/20 11:00 AM, Gerald Schaefer wrote:
> > Commit 1a42010cdc26 ("s390/mm: convert to the generic get_user_pages_fast
> > code") introduced a subtle but severe bug on s390 with gup_fast, due to
> > dynamic page table folding.
>
> Would it
On Tue, Sep 08, 2020 at 12:50:44PM -0400, Qian Cai wrote:
> > No, you're talking nonsense. We must not free @mm when
> > 'current->active_mm == mm', never.
>
> Yes, you are right. It still trigger this below on powerpc with today's
> linux-next by fuzzing for a while (saw a few times on recent lin
On Tue, 8 Sep 2020 07:22:39 +0200
Christophe Leroy wrote:
>
>
> Le 07/09/2020 à 22:12, Mike Rapoport a écrit :
> > On Mon, Sep 07, 2020 at 08:00:55PM +0200, Gerald Schaefer wrote:
> >> This is v2 of an RFC previously discussed here:
> >> https://lore.kernel.org/lkml/20200828140314.8556-1-gerald
On Tue, 25 Aug 2020 21:02:24 +0800, Yu Kuai wrote:
> if of_find_device_by_node() succeed, imx_es8328_probe() doesn't have
> a corresponding put_device(). Thus add a jump target to fix the exception
> handling for this function implementation.
Applied to
https://git.kernel.org/pub/scm/linux/ker
Le 08/09/2020 à 17:48, Alexander Gordeev a écrit :
On Tue, Sep 08, 2020 at 07:19:38AM +0200, Christophe Leroy wrote:
[...]
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 67ebc22cf83d..d9e7d16c2263 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -6
a5 kkk.
[12802.557831][T191552] Redzone c5a61231: bb bb bb bb bb bb bb bb
[12802.557947][T191552] Padding 3163b13a: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a
5a 5a 5a 5a 5a 5a
[12802.558076][T191552] Padding 92412b1a: 5a 5
On Tue, Sep 08, 2020 at 07:19:38AM +0200, Christophe Leroy wrote:
[...]
> >diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
> >index 67ebc22cf83d..d9e7d16c2263 100644
> >--- a/include/linux/pgtable.h
> >+++ b/include/linux/pgtable.h
> >@@ -656,31 +656,35 @@ static inline int arch_un
On Fri, 4 Sep 2020 18:01:15 +0200
Gerald Schaefer wrote:
[...]
>
> BTW2, a quick test with this change (so far) made the issues on s390
> go away:
>
> @@ -1069,7 +1074,7 @@ static int __init debug_vm_pgtable(void)
> spin_unlock(ptl);
>
> #ifndef CONFIG_PPC_BOOK3S_64
> - hugetlb_
On 9/7/20 11:00 AM, Gerald Schaefer wrote:
> x86:
> add/remove: 0/0 grow/shrink: 2/0 up/down: 10/0 (10)
> Function old new delta
> vmemmap_populate 587 592 +5
> munlock_vma_pages_range 556 561
On 9/7/20 11:00 AM, Gerald Schaefer wrote:
> Commit 1a42010cdc26 ("s390/mm: convert to the generic get_user_pages_fast
> code") introduced a subtle but severe bug on s390 with gup_fast, due to
> dynamic page table folding.
Would it be fair to say that the "fake" page table entries s390
allocates o
On Tue, Sep 08, 2020 at 07:14:38AM +0200, Christophe Leroy wrote:
[...]
> You forgot arch/powerpc/mm/book3s64/subpage_prot.c it seems.
If this one would be okay?
diff --git a/arch/powerpc/mm/book3s64/subpage_prot.c
b/arch/powerpc/mm/book3s64/subpage_prot.c
index 60c6ea16..3690d22 100644
--- a/ar
On Tue, Sep 08, 2020 at 10:16:49AM +0200, Christophe Leroy wrote:
> >Yes, and also two more sources :/
> > arch/powerpc/mm/kasan/8xx.c
> > arch/powerpc/mm/kasan/kasan_init_32.c
> >
> >But these two are not quite obvious wrt pgd_addr_end() used
> >while traversing pmds. Could you please clar
On Tue, 8 Sep 2020 14:40:10 +0200
Christophe Leroy wrote:
>
>
> Le 08/09/2020 à 14:09, Christian Borntraeger a écrit :
> >
> >
> > On 08.09.20 07:06, Christophe Leroy wrote:
> >>
> >>
> >> Le 07/09/2020 à 20:00, Gerald Schaefer a écrit :
> >>> From: Alexander Gordeev
> >>>
> >>> Commit 1a420
On Mon, Sep 07, 2020 at 08:00:57PM +0200, Gerald Schaefer wrote:
> From: Alexander Gordeev
>
> Unlike all other page-table abstractions pXd_addr_end() do not take
> into account a particular table entry in which context the functions
> are called. On architectures with dynamic page-tables folding
Le 08/09/2020 à 14:58, Michael Ellerman a écrit :
When we added the VDSO32 kconfig symbol, which controls building of
the 32-bit VDSO, we made it depend on CPU_BIG_ENDIAN (for 64-bit).
That was because back then COMPAT was always enabled for 64-bit, so
depending on it would have left the 32-b
When we added the VDSO32 kconfig symbol, which controls building of
the 32-bit VDSO, we made it depend on CPU_BIG_ENDIAN (for 64-bit).
That was because back then COMPAT was always enabled for 64-bit, so
depending on it would have left the 32-bit VDSO always enabled, which
we didn't want.
But sinc
Le 08/09/2020 à 14:09, Christian Borntraeger a écrit :
On 08.09.20 07:06, Christophe Leroy wrote:
Le 07/09/2020 à 20:00, Gerald Schaefer a écrit :
From: Alexander Gordeev
Commit 1a42010cdc26 ("s390/mm: convert to the generic get_user_pages_fast
code") introduced a subtle but severe bug
On Tue, Sep 08, 2020 at 10:06:56PM +1000, Alexey Kardashevskiy wrote:
> On 08/09/2020 15:44, Christoph Hellwig wrote:
>> On Tue, Sep 08, 2020 at 11:51:06AM +1000, Alexey Kardashevskiy wrote:
>>> What is dma_get_required_mask() for anyway? What "requires" what here?
>>
>> Yes, it is a really odd API
On 08.09.20 07:06, Christophe Leroy wrote:
>
>
> Le 07/09/2020 à 20:00, Gerald Schaefer a écrit :
>> From: Alexander Gordeev
>>
>> Commit 1a42010cdc26 ("s390/mm: convert to the generic get_user_pages_fast
>> code") introduced a subtle but severe bug on s390 with gup_fast, due to
>> dynamic pa
On 08/09/2020 15:44, Christoph Hellwig wrote:
On Tue, Sep 08, 2020 at 11:51:06AM +1000, Alexey Kardashevskiy wrote:
What is dma_get_required_mask() for anyway? What "requires" what here?
Yes, it is a really odd API. It comes from classic old PCI where
64-bit addressing required an addition
On 9/8/20 3:51 AM, Alexey Kardashevskiy wrote:
> There are 2 problems with it:
> 1. "<" vs expected "<<"
> 2. the shift number is an IOMMU page number mask, not an address mask
> as the IOMMU page shift is missing.
>
> This did not hit us before f1565c24b596 ("powerpc: use the generic
> dma_ops_by
Excerpts from Christophe Leroy's message of August 7, 2020 3:15 am:
> Exception fixup doesn't require the heady full regs saving,
heavy
> do it from do_page_fault() directly.
>
> For that, split bad_page_fault() in two parts.
>
> As bad_page_fault() can also
Le 08/09/2020 à 10:43, Nicholas Piggin a écrit :
Excerpts from Christophe Leroy's message of August 7, 2020 3:15 am:
The verification and message introduced by commit 374f3f5979f9
("powerpc/mm/hash: Handle user access of kernel address gracefully")
applies to all platforms, it should not be l
Excerpts from Christophe Leroy's message of August 7, 2020 3:15 am:
> search_exception_tables() is an heavy operation, we have to avoid it.
> When KUAP is selected, we'll know the fault has been blocked by KUAP.
> Otherwise, it behaves just as if the address was already in the TLBs
> and no fault w
Le 08/09/2020 à 10:29, Christophe Leroy a écrit :
Le 08/09/2020 à 09:48, Nicholas Piggin a écrit :
Excerpts from Christophe Leroy's message of September 7, 2020 9:34 pm:
On Mon, 2020-09-07 at 11:20 +0200, Christophe Leroy wrote:
Le 05/09/2020 à 19:43, Nicholas Piggin a écrit :
Make inte
Excerpts from Christophe Leroy's message of August 7, 2020 3:15 am:
> Check address earlier to simplify the following test.
Good logic reduction.
Reviewed-by: Nicholas Piggin
> Signed-off-by: Christophe Leroy
> ---
> arch/powerpc/mm/fault.c | 10 +-
> 1 file changed, 5 insertions(+),
Excerpts from Christophe Leroy's message of August 7, 2020 3:15 am:
> To make it more readable, separate page_fault_is_write() and
> page_fault_is_bad()
> to avoir several levels of #ifdefs
Reviewed-by: Nicholas Piggin
> Signed-off-by: Christophe Leroy
> ---
> arch/powerpc/mm/fault.c | 8
Excerpts from Christophe Leroy's message of August 7, 2020 3:15 am:
> The verification and message introduced by commit 374f3f5979f9
> ("powerpc/mm/hash: Handle user access of kernel address gracefully")
> applies to all platforms, it should not be limited to BOOK3S.
>
> Make the BOOK3S version of
Le 08/09/2020 à 09:48, Nicholas Piggin a écrit :
Excerpts from Christophe Leroy's message of September 7, 2020 9:34 pm:
On Mon, 2020-09-07 at 11:20 +0200, Christophe Leroy wrote:
Le 05/09/2020 à 19:43, Nicholas Piggin a écrit :
Make interrupt handlers all just take the pt_regs * argument a
Le 08/09/2020 à 09:46, Alexander Gordeev a écrit :
On Tue, Sep 08, 2020 at 07:14:38AM +0200, Christophe Leroy wrote:
You forgot arch/powerpc/mm/book3s64/subpage_prot.c it seems.
Yes, and also two more sources :/
arch/powerpc/mm/kasan/8xx.c
arch/powerpc/mm/kasan/kasan_init_32
Excerpts from Christophe Leroy's message of September 7, 2020 9:34 pm:
> On Mon, 2020-09-07 at 11:20 +0200, Christophe Leroy wrote:
>>
>> Le 05/09/2020 à 19:43, Nicholas Piggin a écrit :
>> > Make interrupt handlers all just take the pt_regs * argument and load
>> > DAR/DSISR etc from that. Make t
On Tue, Sep 08, 2020 at 07:14:38AM +0200, Christophe Leroy wrote:
> You forgot arch/powerpc/mm/book3s64/subpage_prot.c it seems.
Yes, and also two more sources :/
arch/powerpc/mm/kasan/8xx.c
arch/powerpc/mm/kasan/kasan_init_32.c
But these two are not quite obvious wrt pgd_addr_end
Excerpts from Christophe Leroy's message of September 7, 2020 7:20 pm:
>
>
> Le 05/09/2020 à 19:43, Nicholas Piggin a écrit :
>> Make interrupt handlers all just take the pt_regs * argument and load
>> DAR/DSISR etc from that. Make those that return a value return long.
>
> I like this, it will
Sachin Sant writes:
>> On 01-Sep-2020, at 6:16 PM, Michael Ellerman wrote:
>>
>> In commit 9b725a90a8f1 ("powerpc/64s: Disallow PROT_SAO in LPARs by
>> default") PROT_SAO was disabled in guests/LPARs by default. So skip
>> the test if we are running in a guest to avoid a spurious failure.
>>
>>
Christian Lamparter writes:
> On 2020-06-23 15:03, Michael Ellerman wrote:
>> With CONFIG_OF_ALL_DTBS=y, as set by eg. allmodconfig, we see lots of
>> warnings about our dts files, such as:
>>
>>arch/powerpc/boot/dts/glacier.dts:492.26-532.5:
>>Warning (pci_bridge): /plb/pciex@d: n
On Tue, Sep 8, 2020 at 6:29 AM Masahiro Yamada wrote:
> There was a request to preprocess the module linker script like we
> do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512)
>
> The difference between vmlinux.lds and module.lds is that the latter
> is needed for external module builds
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