kernel
command line parameter.
Drop this message. While we are touching this code, also drop similar
message when GHES is disabled using the module parameter.
Signed-off-by: Punit Agrawal
Cc: "Rafael J. Wysocki"
Cc: Borislav Petkov
---
drivers/acpi/apei/ghes.c | 9 +
1 file
seful
information. Drop this message.
Signed-off-by: Punit Agrawal
Cc: Jassi Brar
---
drivers/mailbox/pcc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index ac91fd0d62c6..3d83cdc11ab5 100644
--- a/drivers/mailbox/pcc.c
+++ b/dr
-off-by: Punit Agrawal
Cc: Boris Ostrovsky
Cc: Juergen Gross
---
drivers/xen/xenfs/super.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c
index 967f069385d0..71ddfb4cf61c 100644
--- a/drivers/xen/xenfs/super.c
+++ b/drivers/xen/xenfs
Hi Borislav,
Borislav Petkov writes:
> On Thu, Jul 20, 2017 at 12:04:01PM +0100, Punit Agrawal wrote:
>> When booting an ACPI enabled system that does not provide the hardware
>> error source table (HEST), the ghes driver prints the following message
>> in the kernel log -
Borislav Petkov writes:
> On Thu, Jul 20, 2017 at 01:29:17PM +0100, Punit Agrawal wrote:
>> I agree that where there is a genuine problem, relevant messages can
>> help to diagnose the problem. But what's printed now doesn't fit the
>> criteria.
>
> So make
b_fault in follow_hugetlb_page.
>
> Fixes: 9a291a7c9428 ("mm/hugetlb: report -EHWPOISON not -EFAULT when
> FOLL_HWPOISON is specified")
> Signed-off-by: Daniel Jordan
> Cc: Andrea Arcangeli
> Cc: Andrew Morton
> Cc: "Aneesh Kumar K.V"
>
Boris Ostrovsky writes:
> On 07/20/2017 07:04 AM, Punit Agrawal wrote:
>> On systems that are not booted as a Xen domain, the xenfs driver prints
>> the following message during boot.
>>
>> [3.460595] xenfs: not registering filesystem on non-xen platform
>>
&
Juergen Gross writes:
> On 21/07/17 12:12, Punit Agrawal wrote:
>> Boris Ostrovsky writes:
>>
>>> On 07/20/2017 07:04 AM, Punit Agrawal wrote:
>>>> On systems that are not booted as a Xen domain, the xenfs driver prints
>>>> the following mes
Horiguchi-san,
Naoya Horiguchi writes:
> Hi Punit,
>
> On Mon, Feb 05, 2018 at 03:05:43PM +0000, Punit Agrawal wrote:
>> Naoya Horiguchi writes:
>>
[...]
>> >
>> > You can easily reproduce this by calling madvise(MADV_HWPOISON) twice on
&g
Naoya Horiguchi writes:
> Recently the following BUG was reported:
>
> Injecting memory failure for pfn 0x3c at process virtual address
> 0x7fe3
> Memory failure: 0x3c: recovery action for huge page: Recovered
> BUG: unable to handle kernel paging request at 8dfcc
Christoffer Dall writes:
> On Wed, Jan 10, 2018 at 07:07:29PM +0000, Punit Agrawal wrote:
>> KVM only supports PMD hugepages at stage 2. Extend the stage 2 fault
>> handling to add support for PUD hugepages.
>>
>> Addition of PUD hugpage support enables ad
Christoffer Dall writes:
> On Wed, Jan 10, 2018 at 07:07:27PM +0000, Punit Agrawal wrote:
>> In preparation for creating PUD hugepages at stage 2, add support for
>> write protecting PUD hugepages when they are encountered. Write
>> protecting guest tables is used to t
Hi Eduardo,
Eduardo Valentin writes:
> Hello,
>
> On Fri, Nov 17, 2017 at 12:31:41AM +0100, Rafael J. Wysocki wrote:
>> On Thursday, November 16, 2017 4:20:58 PM CET Viresh Kumar wrote:
>> > On 16-11-17, 15:02, Ionela Voinescu wrote:
>> > > When it was added in lsk 3.18 in what was then a therma
Punit Agrawal writes:
> According to the ACPI specification, firmware is not required to provide
> the Hardware Error Source Table (HEST). When HEST is not present, the
> following superfluous message is printed to the kernel boot log -
>
> [3.460067] GHES: HEST is not enab
Borislav Petkov writes:
> On Wed, Aug 16, 2017 at 12:27:53PM +0100, Punit Agrawal wrote:
>> According to the ACPI specification, firmware is not required to provide
>> the Hardware Error Source Table (HEST). When HEST is not present, the
>> following superfluous message is
the firmware provides this
table and if it is not present skip any log output. The existing
behaviour is preserved in all other cases.
Suggested-by: Borislav Petkov
Signed-off-by: Punit Agrawal
Cc: Borislav Petkov
Cc: James Morse
---
Changes in v3:
* Grouped hest_disable status checking into
Borislav Petkov writes:
> On Tue, Aug 29, 2017 at 02:20:20PM +0100, Punit Agrawal wrote:
>> According to the ACPI specification, firmware is not required to provide
>> the Hardware Error Source Table (HEST). When HEST is not present, the
>> following superfluous message is
"Rafael J. Wysocki" writes:
> On Wednesday, August 30, 2017 12:34:55 PM CEST Punit Agrawal wrote:
>> Borislav Petkov writes:
>>
>> > On Tue, Aug 29, 2017 at 02:20:20PM +0100, Punit Agrawal wrote:
>> >> According to the ACPI specification, firmware
Hi Mike,
Mike Kravetz writes:
> On 08/21/2017 11:07 AM, Catalin Marinas wrote:
>> On Fri, Aug 18, 2017 at 02:29:18PM -0700, Mike Kravetz wrote:
>>> On 08/18/2017 07:54 AM, Punit Agrawal wrote:
>>>> When walking the page tables to resolve an address that point
ffset().
Signed-off-by: Punit Agrawal
Cc: Catalin Marinas
Cc: Naoya Horiguchi
Cc: Steve Capper
Cc: Will Deacon
Cc: Kirill A. Shutemov
Cc: Michal Hocko
Cc: Mike Kravetz
---
Hi Andrew,
>From discussions on the arm64 implementation of huge_pte_offset()[0]
we realised that there is bene
tory /sys/firmware/acpi/tables/data/BERT
>
> Cc: Len Brown
> Cc: Boris Petkov
> Cc: Tyler Baicar
> Cc: Punit Agrawal
> Cc: linux-a...@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Tony Luck
>
> v4: (suggested by Punit Agrawal) extend the /sy
nux-kernel@vger.kernel.org/msg1376052.html
[1] https://lkml.org/lkml/2017/4/7/486
[2] https://lkml.org/lkml/2017/4/5/402
Jonathan (Zhixiong) Zhang (2):
arm64: hwpoison: add VM_FAULT_HWPOISON[_LARGE] handling
arm64: kconfig: allow support for memory failure handling
Punit Agrawal (1):
arm64: hu
.
[ 344.165544] mm/pgtable-generic.c:33: bad pmd 00083af00074.
Fix huge_pte_offset() to return the poisoned pte which is then
appropriately handled by the generic layer code.
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Cc: Catalin Marinas
Cc: David Woods
---
arch/arm64/include/asm
b field is
initialized.
Signed-off-by: Jonathan (Zhixiong) Zhang
Signed-off-by: Tyler Baicar
(fix new __do_user_fault call-site)
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
---
arch/arm64/mm/fault.c | 22 +++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/
From: "Jonathan (Zhixiong) Zhang"
Declare ARCH_SUPPORTS_MEMORY_FAILURE, as arm64 does support
memory failure recovery attempt.
Signed-off-by: Jonathan (Zhixiong) Zhang
Signed-off-by: Tyler Baicar
(Dropped changes to ACPI APEI Kconfig and updated commit log)
Signed-off-by: Punit Agra
Timur Tabi writes:
> On Thu, May 4, 2017 at 10:55 AM, Punit Agrawal wrote:
>> Indeed - I was avoiding changing the function to drop contiguous
>> hugepage support which follows this hunk.
>>
>> I've made changes locally based on your suggestion and will post a
&g
clear() and set_huge_pte_at()
RFC -> v1
* Fixed a missing conversion of huge_pte_offset() prototype to add
hstate parameter. Reported by 0-day.
[0] https://lkml.org/lkml/2017/3/23/293
[1] https://lkml.org/lkml/2017/3/30/770
[2] http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1370686.html
Pu
ot;
Cc: Aneesh Kumar K.V
Signed-off-by: Will Deacon
Acked-by: Steve Capper
Signed-off-by: Punit Agrawal
---
mm/gup.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/mm/gup.c b/mm/gup.c
index d9e6fddcc51f..ccf8cb38234f 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1361,7 +1361,6 @@ static int gup
with
page_cache_get_speculative() where users already pass the appropriate
page, i.e., the de-referenced head.
Apply the same logic to fix gup_huge_[pud|pgd]() as well.
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Cc: Michal Hocko
Cc: "Kirill A. Shutemov"
Cc: Aneesh Kumar K.V
---
encountered.
Let's remove the ambiguity by adding a size parameter to convey
additional information about the requested address. Also fixup the
definition/usage of huge_pte_offset() throughout the tree.
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Cc: Catalin Marinas
Cc: Will Deaco
Using set_pte_at() does not do the right thing when putting down
HWPOISON swap entries for hugepages on architectures that support
contiguous ptes.
Fix this problem by using set_huge_swap_pte_at() which was introduced to
fix exactly this problem.
Signed-off-by: Punit Agrawal
Acked-by: Steve
overridable helper that is called when
populating the page tables with swap entries. The size of the targeted
region is provided to the helper to help determine the number of entries
to be updated.
Provide a default implementation that maintains the current behaviour.
Signed-off-by: Punit Agrawal
d any change.
Signed-off-by: Punit Agrawal
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Arnd Bergmann
Cc: "Aneesh Kumar K.V"
Cc: Mike Kravetz
---
arch/s390/include/asm/hugetlb.h | 10 ++
arch/s390/mm/hugetlbpage.c | 9 +
include/asm-generic/hugetlb.h |
Arnd Bergmann writes:
> On Mon, May 22, 2017 at 3:36 PM, Punit Agrawal wrote:
>> diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
>> index 99b490b4d05a..3138e126f43b 100644
>> --- a/include/asm-generic/hugetlb.h
>> +++ b/include/asm-generic/h
ff-by: Punit Agrawal
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Arnd Bergmann
Cc: "Aneesh Kumar K.V"
Cc: Mike Kravetz
---
Changes since v3
* Drop weak function and use #ifndef block to allow architecture override
* Drop unnecessary move of s390 function definition
arch/s390/includ
current behaviour.
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Cc: Mike Kravetz
Cc: "Aneesh Kumar K.V"
---
Changes since v3:
* Use #ifndef block instead of weak function
include/linux/hugetlb.h | 8
mm/hugetlb.c| 8 +---
2 files changed, 13 insert
Arnd Bergmann writes:
> On Mon, May 22, 2017 at 6:25 PM, Punit Agrawal wrote:
>> When unmapping a hugepage range, huge_pte_clear() is used to clear the
>> page table entries that are marked as not present. huge_pte_clear()
>> internally just ends up calling pte_clear() whi
Martin Schwidefsky writes:
> On Mon, 22 May 2017 17:25:55 +0100
> Punit Agrawal wrote:
>
>> When unmapping a hugepage range, huge_pte_clear() is used to clear the
>> page table entries that are marked as not present. huge_pte_clear()
>> internally just ends up calling
"Kirill A. Shutemov" writes:
> On Mon, May 22, 2017 at 02:36:00PM +0100, Punit Agrawal wrote:
>> When speculatively taking references to a hugepage using
>> page_cache_add_speculative() in gup_huge_pmd(), it is assumed that the
>> page returned by pmd_page() is t
Will Deacon writes:
> On Wed, Jun 07, 2017 at 03:30:37PM +0100, Catalin Marinas wrote:
>> On Wed, Jun 07, 2017 at 02:47:32PM +0100, Will Deacon wrote:
>> > On Wed, May 17, 2017 at 04:23:34PM +0100, Punit Agrawal wrote:
>> > > --- a/arch/arm64/mm/hugetlbpag
Punit Agrawal writes:
> When speculatively taking references to a hugepage using
> page_cache_add_speculative() in gup_huge_pmd(), it is assumed that the
> page returned by pmd_page() is the head page. Although normally true,
> this assumption doesn't hold when the huge
Catalin Marinas writes:
> On Wed, Apr 12, 2017 at 03:04:57PM +0100, Punit Agrawal wrote:
>> When memory failure is enabled, a poisoned hugepage pte is marked as a
>> swap entry. huge_pte_offset() does not return the poisoned page table
>> entries when it encounters PUD/PMD h
board bring-up.
Patch 3 is where the bulk of the checking is introduced. The patch is
a bit invasive but there doesn't seem to be a nicer way to isolate the
change given layout of the redistributor.
Feedback welcome.
Thanks,
Punit
Punit Agrawal (3):
irqchip/gic-v3: Use resource structur
When a redistributor is not found at the address provided by the
firmware, report the firmware provided address to help user identify the
offending firmware data.
Signed-off-by: Punit Agrawal
Cc: Marc Zyngier
---
drivers/irqchip/irq-gic-v3.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion
egion size.
Signed-off-by: Punit Agrawal
Cc: Marc Zyngier
---
drivers/irqchip/irq-gic-v3.c | 48
1 file changed, 40 insertions(+), 8 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 881d327c53fa..754d936
quent commits to add bounds checking to redistributor region
accesses.
Signed-off-by: Punit Agrawal
Cc: Marc Zyngier
---
drivers/irqchip/irq-gic-v3.c | 29 +++--
1 file changed, 19 insertions(+), 10 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchi
Will Deacon writes:
> On Wed, May 17, 2017 at 04:23:35PM +0100, Punit Agrawal wrote:
>> From: "Jonathan (Zhixiong) Zhang"
>>
>> Add VM_FAULT_HWPOISON[_LARGE] handling to the arm64 page fault
>> handler. Handling of VM_FAULT_HWPOISON[_LARGE] is very
Will Deacon writes:
> On Wed, Jun 07, 2017 at 04:32:28PM +0100, Punit Agrawal wrote:
>> Will Deacon writes:
>>
>> > On Wed, Jun 07, 2017 at 03:30:37PM +0100, Catalin Marinas wrote:
>> >> On Wed, Jun 07, 2017 at 02:47:32PM +0100, Will Deacon wrote:
>&g
sg581657.html
[1] https://lkml.org/lkml/2017/4/7/486
[2] https://lkml.org/lkml/2017/4/5/402
Jonathan (Zhixiong) Zhang (2):
arm64: hwpoison: add VM_FAULT_HWPOISON[_LARGE] handling
arm64: kconfig: allow support for memory failure handling
Punit Agrawal (2):
arm64: hugetlb: Fix huge_pte_
.
[ 344.165544] mm/pgtable-generic.c:33: bad pmd 00083af00074.
Fix huge_pte_offset() to return the poisoned pte which is then
appropriately handled by the generic layer code.
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Reviewed-by: Catalin Marinas
Cc: David Woods
Tested-by: Manoj
PERF_COUNT_SW_PAGE_FAULTS
* Doesn't report anything else for VM_FAULT_ERROR (which includes
hwpoison faults)
* Reports PERF_COUNT_SW_PAGE_FAULTS_MAJ if it's a major
fault (indicated by VM_FAULT_MAJOR)
* Otherwise, reports PERF_COUNT_SW_PAGE_FAULTS_MIN
Signed-off-by: Punit Agrawal
---
arc
b field is
initialized.
Signed-off-by: Jonathan (Zhixiong) Zhang
Signed-off-by: Tyler Baicar
(fix new __do_user_fault call-site)
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Tested-by: Manoj Iyer
---
arch/arm64/mm/fault.c | 22 +++---
1 file changed, 19 insertions(+), 3
From: "Jonathan (Zhixiong) Zhang"
Declare ARCH_SUPPORTS_MEMORY_FAILURE, as arm64 does support
memory failure recovery attempt.
Signed-off-by: Jonathan (Zhixiong) Zhang
Signed-off-by: Tyler Baicar
(Dropped changes to ACPI APEI Kconfig and updated commit log)
Signed-off-by: Punit Agra
Will Deacon writes:
> On Fri, Jun 02, 2017 at 05:42:04PM +0300, Yury Norov wrote:
>> On Fri, Jun 02, 2017 at 03:37:51PM +0300, Yury Norov wrote:
>> > On Fri, Jun 02, 2017 at 01:19:18PM +0100, Will Deacon wrote:
>> > > Hi Yury,
>> > >
>> > > [adding Steve and Punit]
>> > >
>> > > On Fri, Jun 02,
Punit Agrawal writes:
> Will Deacon writes:
>
>> On Fri, Jun 02, 2017 at 05:42:04PM +0300, Yury Norov wrote:
>>> On Fri, Jun 02, 2017 at 03:37:51PM +0300, Yury Norov wrote:
>>> > On Fri, Jun 02, 2017 at 01:19:18PM +0100, Will Deacon wrote:
>>> >
with
page_cache_get_speculative() where users already pass the appropriate
page, i.e., the de-referenced head.
Apply the same logic to fix gup_huge_[pud|pgd]() as well.
Signed-off-by: Punit Agrawal
Cc: Steve Capper
Cc: Michal Hocko
Cc: "Kirill A. Shutemov"
Cc: Aneesh Kumar K.V
---
Hi Andrew,
Pl
most importantly, documents the expected behaviour of
huge_pte_offset()
All feedback welcome.
Thanks,
Punit
[0]
Punit Agrawal (2):
mm/hugetlb: Make huge_pte_offset() consistent between PUD and PMD
entries
mm/hugetlb: Support swap entries in huge_pte_offset()
mm/hugetlb.c | 22
documentation to explicitly state this
behaviour. This is to help clarify expectations for architecture
specific implementations of huge_pte_offset().
Signed-off-by: Punit Agrawal
---
mm/hugetlb.c | 14 --
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/mm/hugetlb.c b/mm
table entry.
Make huge_pte_offset() consistent by always returning NULL on
encountering a !present_p*d() entry. Document the behaviour to clarify
the expected semantics of this function.
Signed-off-by: Punit Agrawal
---
mm/hugetlb.c | 16 +++-
1 file changed, 15 insertions(+), 1
Catalin Marinas writes:
> Hi Punit,
>
> On Mon, Jul 24, 2017 at 06:33:17PM +0100, Punit Agrawal wrote:
>> When walking the page tables to resolve an address that points to
>> !present_p*d() entry, huge_pte_offset() returns inconsistent values
>> depending on the leve
swap entries.
Document the behaviour to clarify the expected behaviour of this
function. This is to set clear semantics for architecture specific
implementations of huge_pte_offset().
Signed-off-by: Punit Agrawal
---
mm/hugetlb.c | 22 +++---
1 file changed, 19 insertions(+), 3
of huge_pte_offset()
All feedback welcome.
Thanks,
Punit
[0] https://lkml.org/lkml/2017/7/24/514
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f02ab08afbe76ee7b0b2a34a9970e7dd200d8b01
Punit Agrawal (1):
mm/hugetlb: Make huge_pte_offset() consistent and
Punit Agrawal writes:
> Hi,
>
> The small series re-factors the GHES driver initialisation to move
> memory allocation and checks from driver init to device probe. The net
> effect is to improve the situation for systems that do not support
> APEI.
>
> The patches are or
Hi Boris,
Borislav Petkov writes:
> On Tue, Aug 01, 2017 at 02:36:07PM +0100, Punit Agrawal wrote:
>> During the driver init, the ghes driver initialises some data structures
>
> Let's stick to "GHES" in capital letters everywhere.
>
>> which are only u
Hi Tony,
"Luck, Tony" writes:
> From: Tony Luck
>
> The ACPI Boot Error Record Table provides a method for platform
> firmware to give information to the operating system about error
> that occurred prior to boot (of particular interest are problems
> that caused the previous OS instance to cra
[ thanks for dropping the bad email! ]
Borislav Petkov writes:
> On Tue, Aug 15, 2017 at 11:10:05AM +0100, Punit Agrawal wrote:
>> In the absence of any GHES entries these are wasted.
>
> I know. This whole APEI init code would need a proper cleanup, like
> acpi_pci
"Rafael J. Wysocki" writes:
> On 7/31/2017 7:47 PM, Alexey Klimov wrote:
>> (keeping Rafael in c/c per Jassi suggestion)
>>
>> On Thu, Jul 20, 2017 at 12:04 PM, Punit Agrawal
>> wrote:
>>> When booting on an ACPI enabled system that does not p
seful
information. Drop this message.
Signed-off-by: Punit Agrawal
Cc: Jassi Brar
Acked-by: Alexey Klimov
---
Hi Rafael,
Re-sending the patch with linux-acpi on cc and tags applied as
requested. If there are no objections please consider merging.
Thanks,
Punit
drivers/mailbox/pcc.c | 4 +---
1 file ch
discussion. They patches are based on v4.13-rc3 and have been tested
on a system that does not support APEI. Further testing on systems
that support APEI to ensure that the changes do not break expected
behaviour will be greatly appreciated.
Thanks,
Punit
[0] https://lkml.org/lkml/2017/7/20/430
Punit
pool by calling
ghes_estatus_pool_expand().
The change is in preparation for moving the pool creation out of driver
initialisation to when a platform device is being probed.
Signed-off-by: Punit Agrawal
Cc: Borislav Petkov
Cc: James Morse
---
drivers/acpi/apei/ghes.c | 55
are currently performed on driver init. The function is
called when the GHES device is probed.
Delaying initialisation and checks until probe has the added benefit of
reducing driver prints on systems that do not support ACPI APEI.
Signed-off-by: Punit Agrawal
Cc: Borislav Petkov
Cc: James Morse
that do
not have the HEST table or APEI support.
Update the initialisation to skip setting hest_disable when the HEST
table is not found.
Signed-off-by: Punit Agrawal
Cc: Borislav Petkov
---
drivers/acpi/apei/hest.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers
Punit Agrawal writes:
> During the driver init, the ghes driver initialises some data structures
> which are only used if a GHES platform device is probed. Similarly, the
> init function also checks for support for firmware first mode.
>
> Create a function, ghes_common_init(), th
/2017/6/5/332
Punit Agrawal (5):
mm, gup: Ensure real head page is ref-counted when using hugepages
mm/hugetlb: add size parameter to huge_pte_offset()
mm/hugetlb: Allow architectures to override huge_pte_clear()
mm/hugetlb: Introduce set_huge_swap_pte_at() helper
mm: rmap: Use correct
From: Steve Capper
We don't need to call huge_ptep_offset as our accessors are already
supplied with the pte_t *. This patch removes those spurious calls.
Cc: David Woods
Signed-off-by: Steve Capper
[ Resolved rebase conflicts due to patch re-ordering ]
Signed-off-by: Punit Agrawal
---
with
page_cache_get_speculative() where users already pass the appropriate
page, i.e., the de-referenced head.
Apply the same logic to fix gup_huge_[pud|pgd]() as well.
Signed-off-by: Punit Agrawal
Cc: Steve Capper
Cc: Michal Hocko
Cc: "Kirill A. Shutemov"
Cc: Aneesh Kumar K.V
---
mm/gup.c | 12
encountered.
Let's remove the ambiguity by adding a size parameter to convey
additional information about the requested address. Also fixup the
definition/usage of huge_pte_offset() throughout the tree.
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Cc: Catalin Marinas
Cc: Will Deaco
ff-by: Punit Agrawal
Acked-by: Arnd Bergmann
Acked-by: Martin Schwidefsky
Cc: Heiko Carstens
Cc: "Aneesh Kumar K.V"
Cc: Mike Kravetz
---
arch/s390/include/asm/hugetlb.h | 2 +-
include/asm-generic/hugetlb.h | 4 +++-
mm/hugetlb.c| 2 +-
3 files changed, 5 insertions(
ed-by: Steve Capper
Signed-off-by: Punit Agrawal
Acked-by: "Kirill A. Shutemov"
Cc: Aneesh Kumar K.V
---
mm/gup.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/mm/gup.c b/mm/gup.c
index b3c7214d710d..e74e0b5a0c7c 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1357,7 +1357,6 @@ static i
current behaviour.
Signed-off-by: Punit Agrawal
Acked-by: Steve Capper
Cc: Mike Kravetz
Cc: "Aneesh Kumar K.V"
---
include/linux/hugetlb.h | 13 +
mm/hugetlb.c| 8 +---
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/include/linux/hugetlb.h
Using set_pte_at() does not do the right thing when putting down
HWPOISON swap entries for hugepages on architectures that support
contiguous ptes.
Fix this problem by using set_huge_swap_pte_at() which was introduced to
fix exactly this problem.
Signed-off-by: Punit Agrawal
Acked-by: Steve
From: Steve Capper
As we regularly check for contiguous pte's in the huge accessors, remove
this extra check from find_num_contig.
Cc: David Woods
Signed-off-by: Steve Capper
[ Resolved rebase conflicts due to patch re-ordering ]
Signed-off-by: Punit Agrawal
---
arch/arm64/mm/hugetlbp
Hi Michal,
Michal Hocko writes:
> On Wed 26-07-17 10:50:38, Michal Hocko wrote:
>> On Tue 25-07-17 16:41:14, Punit Agrawal wrote:
>> > When walking the page tables to resolve an address that points to
>> > !p*d_present() entry, huge_pte_offset() returns inconsistent v
Michal Hocko writes:
> On Wed 26-07-17 14:33:57, Michal Hocko wrote:
>> On Wed 26-07-17 13:11:46, Punit Agrawal wrote:
> [...]
>> > I've been running tests from mce-test suite and libhugetlbfs for similar
>> > changes we did on arm64. There could be assumptio
Hi Boris,
Apologies for the delayed response. I somehow managed to lose updates on
this thread.
Borislav Petkov writes:
> On Thu, Jul 20, 2017 at 06:50:51PM +0100, Punit Agrawal wrote:
>> "Firmware does not support APEI firmware first mode"
>>
>> Thoughts?
>
Borislav Petkov writes:
> On Thu, Jul 27, 2017 at 10:35:45AM +0100, Punit Agrawal wrote:
>> ... would you be open to a patch re-working the ghes driver
>> initialisation to only do the platform driver registration. The the rest
>> of the initialisation (including the apei_
Mike Kravetz writes:
> On 07/26/2017 06:34 AM, Punit Agrawal wrote:
>> Michal Hocko writes:
>>
>>> On Wed 26-07-17 14:33:57, Michal Hocko wrote:
>>>> On Wed 26-07-17 13:11:46, Punit Agrawal wrote:
>>> [...]
>>>>> I've be
"Baicar, Tyler" writes:
> Hello Punit,
>
>
> On 10/12/2016 12:00 PM, Punit Agrawal wrote:
>> Tyler Baicar writes:
>>
>>> ARM APEI extension proposal added SEA (Synchrounous External
>>> Abort) notification type for ARMv8.
>>> Add a
"Baicar, Tyler" writes:
> Hello Punit,
>
> On 10/13/2016 7:14 AM, Punit Agrawal wrote:
>> Hi Tyler,
>>
>> I know I've had my last comment already ;), but I thought I'd rather
>> raise the question than stay confused...
>>
>> Tyler
Hi Eric,
One query and a comment below.
Eric Auger writes:
> We introduce the capability to (un)register MSI doorbells.
>
> A doorbell region is characterized by its physical address base, size,
> and whether it its safe (ie. it implements IRQ remapping). A doorbell
> can be per-cpu or global.
Hi Eric,
I am a bit late in joining, but I've tried to familiarise
myself with earlier discussions on the series.
Eric Auger writes:
> This is the second respin on top of Robin's series [1], addressing Alex'
> comments.
>
> Major changes are:
> - MSI-doorbell API now is moved to DMA IOMMU API
Auger Eric writes:
> Hi Punit,
>
> On 14/10/2016 13:24, Punit Agrawal wrote:
>> Hi Eric,
>>
>> I am a bit late in joining, but I've tried to familiarise
>> myself with earlier discussions on the series.
>>
>> Eric Auger writes:
>>
&
.
Signed-off-by: Punit Agrawal
Cc: Jonathan Corbet
---
Documentation/DMA-API-HOWTO.txt | 39 +++
1 file changed, 23 insertions(+), 16 deletions(-)
diff --git a/Documentation/DMA-API-HOWTO.txt b/Documentation/DMA-API-HOWTO.txt
index 979228b..240d1ee 100644
--- a
Although ghes_proc tests for error while reading the error status, it
always return success (0). Fix this by propagating the return value.
Fixes: d334a49113a4a33 ("ACPI, APEI, Generic Hardware Error Source memory error
support")
Signed-of-by: Punit Agrawal
Cc: "Rafael J. Wysocki&
: add __tlbi() macro
arm64/kvm: hyp: tlb: use __tlbi() helper
Punit Agrawal (5):
perf/trace: Add notification for perf trace events
KVM: Track the pid of the VM process
KVM: arm/arm64: Register perf trace event notifier
arm64: KVM: Handle trappable TLB instructions
arm64: KVM: Enabl
: Punit Agrawal
Cc: Paolo Bonzini
Cc: "Radim Krčmář"
Cc: Christoffer Dall
Cc: Marc Zyngier
---
include/linux/kvm_host.h | 1 +
virt/kvm/kvm_main.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 9c28b4d..7c42c94 10
specific
contexts (e.g., virtual machines).
Signed-off-by: Punit Agrawal
Cc: Steven Rostedt
Cc: Ingo Molnar
---
include/linux/trace_events.h| 3 +++
kernel/trace/trace_event_perf.c | 24
2 files changed, 27 insertions(+)
diff --git a/include/linux/trace_events.h b
for a specific virtual machine.
Signed-off-by: Punit Agrawal
Cc: Christoffer Dall
Cc: Marc Zyngier
---
arch/arm64/kvm/perf_trace.c | 32
1 file changed, 32 insertions(+)
diff --git a/arch/arm64/kvm/perf_trace.c b/arch/arm64/kvm/perf_trace.c
index 8bacd18
Register a notifier to track state changes of perf trace events.
The notifier will enable taking appropriate action for trace events
targeting VM.
Signed-off-by: Punit Agrawal
Cc: Christoffer Dall
Cc: Marc Zyngier
---
arch/arm/include/asm/kvm_host.h | 3 +
arch/arm/kvm/arm.c
The ARMv8 architecture allows trapping of TLB maintenane instructions
from EL0/EL1 to higher exception levels. On encountering a trappable TLB
instruction in a guest, an exception is taken to EL2.
Add functionality to handle emulating the TLB instructions.
Signed-off-by: Punit Agrawal
Cc
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