largely borrows from the copyuser_power7 logic and does not add
the VMX optimizations, largely to keep the patch simple. If needed those
optimizations can be folded in.
Signed-off-by: Balbir Singh
[ar...@linux.ibm.com: Added symbol export]
Co-developed-by: Santosh Sivaraj
Signed-off-by: Santosh
If we take a UE on one of the instructions with a fixup entry, set nip
to continue execution at the fixup entry. Stop processing the event
further or print it.
Co-developed-by: Reza Arbab
Signed-off-by: Reza Arbab
Cc: Mahesh Salgaonkar
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/include
Use memcpy_mcsafe() implementation to define copy_to_user_mcsafe()
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/uaccess.h | 14 ++
2 files changed, 15 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
Sasha Levin writes:
> Hi,
>
> [This is an automated email]
>
> This commit has been processed because it contains a "Fixes:" tag,
> fixing commit: ba41e1e1ccb9 powerpc/mce: Hookup derror (load/store) UE errors.
>
> The bot has tested the following trees: v5.2.8, v4.19.66.
>
> v5.2.8: Build OK!
>
This series, which should be based on top of the still un-merged
"powerpc: implement machine check safe memcpy" series, adds support
to add the bad blocks which generated an MCE to the NVDIMM bad blocks.
The next access of the same memory will be blocked by the NVDIMM layer
itself
This is needed to report bad blocks for persistent memory.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/include/asm/mce.h | 3 +++
arch/powerpc/kernel/mce.c | 15 +++
2 files changed, 18 insertions(+)
diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm
Subscribe to the MCE notification and add the physical address which
generated a memory error to nvdimm bad range.
Signed-off-by: Santosh Sivaraj
---
drivers/nvdimm/of_pmem.c | 122 +--
1 file changed, 103 insertions(+), 19 deletions(-)
diff --git a/drivers
Subscribe to the MCE notification and add the physical address which
generated a memory error to nvdimm bad range.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/platforms/pseries/papr_scm.c | 65 +++
1 file changed, 65 insertions(+)
diff --git a/arch/powerpc/platforms
Balbir Singh writes:
> On 12/8/19 7:22 pm, Santosh Sivaraj wrote:
>> Certain architecture specific operating modes (e.g., in powerpc machine
>> check handler that is unable to access vmalloc memory), the
>> search_exception_tables cannot be called because it also searches th
Hi Balbir,
Balbir Singh writes:
> On 12/8/19 7:22 pm, Santosh Sivaraj wrote:
>> Use memcpy_mcsafe() implementation to define copy_to_user_mcsafe()
>>
>> Signed-off-by: Santosh Sivaraj
>> ---
>> arch/powerpc/Kconfig | 1 +
>>
Hi Balbir,
Balbir Singh writes:
> On 12/8/19 7:22 pm, Santosh Sivaraj wrote:
>> If we take a UE on one of the instructions with a fixup entry, set nip
>> to continue execution at the fixup entry. Stop processing the event
>> further or print it.
>>
>> Co-develo
et r13 workaround as the last patch
--
Balbir Singh (3):
powerpc/mce: Fix MCE handling for huge pages
powerpc/memcpy: Add memcpy_mcsafe for pmem
powerpc/mce: Handle UE event for memcpy_mcsafe
Reza Arbab (1):
powerpc/mce: Make machine_check_ue_event() static
Santosh Sivaraj (3):
power
schedule_work() cannot be called from MCE exception context as MCE can
interrupt even in interrupt disabled context.
fixes: 733e4a4c ("powerpc/mce: hookup memory_failure for UE errors")
Suggested-by: Mahesh Salgaonkar
Signed-off-by: Santosh Sivaraj
Reviewed-by: Mahesh Salgaonkar
: ba41e1e1ccb9 ("powerpc/mce: Hookup derror (load/store) UE errors")
Signed-off-by: Balbir Singh
[ar...@linux.ibm.com: Fixup pseries_do_memory_failure()]
Signed-off-by: Reza Arbab
Co-developed-by: Santosh Sivaraj
Signed-off-by: Santosh Sivaraj
Tested-by: Mahesh Salgaonkar
Cc: sta...@vger.
From: Reza Arbab
The function doesn't get used outside this file, so make it static.
Signed-off-by: Reza Arbab
Signed-off-by: Santosh Sivaraj
Reviewed-by: Nicholas Piggin
---
arch/powerpc/kernel/mce.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/po
Gleixner
Cc: Ingo Molnar
Cc: Nicholas Piggin
Signed-off-by: Santosh Sivaraj
Reviewed-by: Nicholas Piggin
---
include/linux/extable.h | 2 ++
kernel/extable.c| 11 +--
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/include/linux/extable.h b/include/linux/extable.h
largely borrows from the copyuser_power7 logic and does not add
the VMX optimizations, largely to keep the patch simple. If needed those
optimizations can be folded in.
Signed-off-by: Balbir Singh
[ar...@linux.ibm.com: Added symbol export]
Co-developed-by: Santosh Sivaraj
Signed-off-by: Santosh
From: Balbir Singh
If we take a UE on one of the instructions with a fixup entry, set nip
to continue execution at the fixup entry. Stop processing the event
further or print it.
Co-developed-by: Reza Arbab
Signed-off-by: Reza Arbab
Signed-off-by: Balbir Singh
Signed-off-by: Santosh Sivaraj
Use memcpy_mcsafe() implementation to define copy_to_user_mcsafe()
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/uaccess.h | 14 ++
2 files changed, 15 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
"Oliver O'Halloran" writes:
> On Wed, Aug 14, 2019 at 6:25 PM Santosh Sivaraj wrote:
>>
>> Subscribe to the MCE notification and add the physical address which
>> generated a memory error to nvdimm bad range.
>>
>> Signed-off-by: Santosh Si
in struct mmu_gather so that the
architecture code can operate accordingly if it's the intermediate
levels being invalidated.
Signed-off-by: Peter Zijlstra
Signed-off-by: Will Deacon
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for tlbflush backports]
---
include/asm-ge
The TLB flush optimisation (a46cc7a90f: powerpc/mm/radix: Improve TLB/PWC
flushes) may result in random memory corruption. Any concurrent page-table walk
could end up with a Use-after-Free. Even on UP this might give issues, since
mmu_gather is preemptible these days. An interrupt or preempted task
granule required for invalidation.
Signed-off-by: Will Deacon
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for upcoming tlbflush backports]
---
include/asm-generic/tlb.h | 58 +--
mm/memory.c | 4 ++-
2 files changed, 53
change in behavior intended.
Signed-off-by: Peter Zijlstra (Intel)
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for upcoming tlbflush backports]
---
arch/Kconfig | 2 +-
arch/powerpc/Kconfig | 1 +
arch/sparc/Kconfig | 1 +
arch/x86/Kconfig | 1 -
mm/memory.c
th our platforms that run on
Power9 force SMP on in Kconfig, so the !SMP case is unlikely to be a
problem for anyone in practice, unless they've hacked their kernel to
build it !SMP."
Link:
http://lkml.kernel.org/r/20200116064531.483522-2-aneesh.ku...@linux.ibm.com
Signed-off-by: Aneesh
owerpc/mm/radix: Improve TLB/PWC flushes")
Signed-off-by: Peter Zijlstra (Intel)
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported to 4.19 stable]
---
arch/Kconfig| 3 ---
arch/powerpc/Kconfig| 1 -
arch/powerpc/include/asm/tlb.h | 11 +++
-by: Aneesh Kumar K.V
Reported-by: "Aneesh Kumar K.V"
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported to 4.19 stable]
---
include/asm-generic/tlb.h | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/asm-generic/tlb.h b/include/asm-g
The TLB flush optimisation (a46cc7a90f: powerpc/mm/radix: Improve TLB/PWC
flushes) may result in random memory corruption. Any concurrent page-table walk
could end up with a Use-after-Free. Even on UP this might give issues, since
mmu_gather is preemptible these days. An interrupt or preempted task
in struct mmu_gather so that the
architecture code can operate accordingly if it's the intermediate
levels being invalidated.
22a61c3c4f1379 in upstream
Signed-off-by: Peter Zijlstra
Signed-off-by: Will Deacon
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for tlb
granule required for invalidation.
a6d60245d6d9 in upstream
Signed-off-by: Will Deacon
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for upcoming tlbflush backports]
---
include/asm-generic/tlb.h | 58 +--
mm/memory.c | 4
change in behavior intended.
96bc9567cbe1 in upstream.
Signed-off-by: Peter Zijlstra (Intel)
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for upcoming tlbflush backports]
---
arch/Kconfig | 2 +-
arch/powerpc/Kconfig | 1 +
arch/sparc/Kconfig | 1 +
arch/x86
x.ibm.com
Signed-off-by: Aneesh Kumar K.V
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported for 4.19 stable]
---
arch/powerpc/Kconfig | 2 +-
arch/powerpc/include/asm/book3s/32/pgalloc.h | 8
arch/powerpc/include/asm/book3s/64/pgalloc.h | 2 --
arc
a (Intel)
Signed-off-by: Aneesh Kumar K.V
Reported-by: "Aneesh Kumar K.V"
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported to 4.19 stable]
---
include/asm-generic/tlb.h | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/asm-generic/tl
.com
Fixes: a46cc7a90fd8 ("powerpc/mm/radix: Improve TLB/PWC flushes")
Signed-off-by: Peter Zijlstra (Intel)
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported to 4.19 stable]
---
arch/Kconfig| 3 ---
arch/powerpc/Kconfig| 1 -
arch/powerpc/inc
bm.com: Fixup pseries_do_memory_failure()]
>> Signed-off-by: Reza Arbab
>> Co-developed-by: Santosh Sivaraj
>> Signed-off-by: Santosh Sivaraj
>> Tested-by: Mahesh Salgaonkar
>> Cc: sta...@vger.kernel.org # v4.15+
>> ---
>> arch/powerpc/include/asm/m
This series, which should be based on top of the still un-merged
"powerpc: implement machine check safe memcpy" series, adds support
to add the bad blocks which generated an MCE to the NVDIMM bad blocks.
The next access of the same memory will be blocked by the NVDIMM layer
itself.
-
This is needed to report bad blocks for persistent memory.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/include/asm/mce.h | 3 +++
arch/powerpc/kernel/mce.c | 15 +++
2 files changed, 18 insertions(+)
diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm
Subscribe to the MCE notification and add the physical address which
generated a memory error to nvdimm bad range.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/platforms/pseries/papr_scm.c | 86 ++-
1 file changed, 85 insertions(+), 1 deletion(-)
diff --git a/arch
Subscribe to the MCE notification and add the physical address which
generated a memory error to nvdimm bad range.
Signed-off-by: Santosh Sivaraj
---
drivers/nvdimm/of_pmem.c | 151 +--
1 file changed, 131 insertions(+), 20 deletions(-)
diff --git a/drivers
Santosh Sivaraj writes:
> This series, which should be based on top of the still un-merged
> "powerpc: implement machine check safe memcpy" series, adds support
> to add the bad blocks which generated an MCE to the NVDIMM bad blocks.
> The next access of the same memory
powerpc/memcpy: Add memcpy_mcsafe for pmem
Reza Arbab (1):
powerpc/mce: Make machine_check_ue_event() static
Santosh Sivaraj (3):
powerpc/mce: Schedule work from irq_work
extable: Add function to search only kernel exception table
powerpc: add machine check safe copy_to_user
arch
schedule_work() cannot be called from MCE exception context as MCE can
interrupt even in interrupt disabled context.
fixes: 733e4a4c ("powerpc/mce: hookup memory_failure for UE errors")
Reviewed-by: Mahesh Salgaonkar
Reviewed-by: Nicholas Piggin
Acked-by: Balbir Singh
Signed-off-b
: ba41e1e1ccb9 ("powerpc/mce: Hookup derror (load/store) UE errors")
Signed-off-by: Balbir Singh
[ar...@linux.ibm.com: Fixup pseries_do_memory_failure()]
Signed-off-by: Reza Arbab
Tested-by: Mahesh Salgaonkar
Signed-off-by: Santosh Sivaraj
Cc: sta...@vger.kernel.org # v4.15+
---
arch/powe
From: Reza Arbab
The function doesn't get used outside this file, so make it static.
Signed-off-by: Reza Arbab
Signed-off-by: Santosh Sivaraj
Reviewed-by: Nicholas Piggin
---
arch/powerpc/kernel/mce.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/po
Gleixner
Cc: Ingo Molnar
Cc: Nicholas Piggin
Signed-off-by: Santosh Sivaraj
Reviewed-by: Nicholas Piggin
---
include/linux/extable.h | 2 ++
kernel/extable.c| 11 +--
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/include/linux/extable.h b/include/linux/extable.h
Reviewed-by: Nicholas Piggin
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/include/asm/mce.h | 4 +++-
arch/powerpc/kernel/mce.c | 16
arch/powerpc/kernel/mce_power.c | 15 +--
3 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc
largely borrows from the copyuser_power7 logic and does not add
the VMX optimizations, largely to keep the patch simple. If needed those
optimizations can be folded in.
Signed-off-by: Balbir Singh
[ar...@linux.ibm.com: Added symbol export]
Co-developed-by: Santosh Sivaraj
Signed-off-by: Santosh
Use memcpy_mcsafe() implementation to define copy_to_user_mcsafe()
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/uaccess.h | 14 ++
2 files changed, 15 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
clock-gettime-realtime-coarse: syscall: 515 nsec/call373 nsec/call
clock-gettime-realtime-coarse:libc: 23 nsec/call 22 nsec/call
clock-gettime-realtime-coarse:vdso: 14 nsec/call 13 nsec/call
Based on the patch by Christophe Leroy for vdso32.
Signed-off-by: Santosh Sivaraj
Christophe Leroy writes:
> Le 21/08/2019 à 11:29, Santosh Sivaraj a écrit :
>> __get_datapage() is only a few instructions to retrieve the
>> address of the page where the kernel stores data to the VDSO.
>>
>> By inlining this function into its users, a bl/blr pair
Christophe Leroy writes:
> Le 21/08/2019 à 14:15, Segher Boessenkool a écrit :
>> On Wed, Aug 21, 2019 at 01:50:52PM +0200, Christophe Leroy wrote:
>>> Do you have any idea on how to avoid that bcl/mflr stuff ?
>>
>> Do a load from some fixed address? Maybe an absolute address, even?
>> lwz r3,
Christophe Leroy writes:
> DSISR has a bit to tell if the fault is due to a read or a write.
>
> Display it.
>
> Signed-off-by: Christophe Leroy
Reviewed-by: Santosh Sivaraj
> ---
> arch/powerpc/mm/fault.c | 6 --
> 1 file changed, 4 insertions(+), 2 deletions(
Hi Christophe,
Christophe Leroy writes:
> __get_datapage() is only a few instructions to retrieve the
> address of the page where the kernel stores data to the VDSO.
>
> By inlining this function into its users, a bl/blr pair and
> a mflr/mtlr pair is avoided, plus a few reg moves.
>
> The impro
Appropriate self tests for memcpy_mcsafe
Suggested-by: Michael Ellerman
Signed-off-by: Santosh Sivaraj
---
tools/testing/selftests/powerpc/copyloops/.gitignore | 1 +
tools/testing/selftests/powerpc/copyloops/Makefile | 7 ++-
tools/testing/selftests/powerpc/copyloops/asm
For sizes lesser than 128 bytes, the code branches out early without saving
the stack frame, which when restored later drops frame of the caller.
Tested-by: Aneesh Kumar K.V
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/lib/memcpy_mcsafe_64.S | 2 +-
1 file changed, 1 insertion(+), 1
t
> Signed-off-by: Aneesh Kumar K.V
> ---
> arch/powerpc/mm/init_64.c | 17 ++++-
> drivers/nvdimm/pfn_devs.c | 2 ++
> include/linux/memremap.h | 1 +
> 3 files changed, 19 insertions(+), 1 deletion(-)
Tested-by: Santosh Sivaraj
>
> diff --git a/arch/powe
Christophe Leroy writes:
> Hi Santosh,
>
> Le 26/08/2019 à 07:44, Santosh Sivaraj a écrit :
>> Hi Christophe,
>>
>> Christophe Leroy writes:
>>
>>> __get_datapage() is only a few instructions to retrieve the
>>> address of the page where the
Christophe Leroy writes:
> Le 13/09/2019 à 15:31, Santosh Sivaraj a écrit :
>> Christophe Leroy writes:
>>
>>> Hi Santosh,
>>>
>>> Le 26/08/2019 à 07:44, Santosh Sivaraj a écrit :
>>>> Hi Christophe,
>>>>
>>>> Chris
Define watchdog_allowed_mask only when SOFTLOCKUP_DETECTOR is enabled.
Signed-off-by: Santosh Sivaraj
---
Original patch is here:
https://lore.kernel.org/lkml/20190807014417.9418-1-sant...@fossix.org/
A similar patch was also sent by Balamuruhan and reviewed by Petr.
https://lkml.org/lkml/2020
Define watchdog_allowed_mask only when SOFTLOCKUP_DETECTOR is enabled.
Fixes: 7feeb9cd4f5b ("watchdog/sysctl: Clean up sysctl variable name space")
Cc: Thomas Gleixner
Cc: Andrew Morton
Reviewed-by: Petr Mladek
Signed-off-by: Santosh Sivaraj
---
v2:
Added Petr's reviewed-by f
Hi Ganesh,
Ganesh Goudar writes:
> When we hit an UE while using machine check safe copy routines,
> ignore_event flag is set and the event is ignored by mce handler,
> And the flag is also saved for defered handling and printing of
> mce event information, But as of now saving of this flag is
mce->u.ue_error.physical_address = phys_addr;
> - mce->u.ue_error.ignore_event = mce_err->ignore_event;
> machine_check_ue_event(mce);
> }
> }
Small nit:
Setting ignore event can happen before the ph
Ganesh writes:
> On 4/20/21 12:54 PM, Santosh Sivaraj wrote:
>
>> Hi Ganesh,
>>
>> Ganesh Goudar writes:
>>
>>> When we hit an UE while using machine check safe copy routines,
>>> ignore_event flag is set and the event is ignored by mce han
Hi Lakshmi,
Lakshmi Ramasubramanian writes:
> There are a few "goto out;" statements before the local variable "fdt"
> is initialized through the call to of_kexec_alloc_and_setup_fdt() in
> elf64_load(). This will result in an uninitialized "fdt" being passed
> to kvfree() in this function if
Lakshmi Ramasubramanian writes:
> On 4/20/21 10:35 PM, Santosh Sivaraj wrote:
> Hi Santosh,
>
>>
>>> There are a few "goto out;" statements before the local variable "fdt"
>>> is initialized through the call to of_kexec_alloc_and_set
Hi Vaibhav,
Vaibhav Jain writes:
> Persistent memory devices like NVDIMMs can loose cached writes in case
> something prevents flush on power-fail. Such situations are termed as
> dirty shutdown and are exposed to applications as
> last-shutdown-state (LSS) flag and a dirty-shutdown-counter(DS
Kefeng Wang writes:
> Use setup_initial_init_mm() helper to simplify code.
>
> Cc: Michael Ellerman
> Cc: Benjamin Herrenschmidt
> Cc: linuxppc-dev@lists.ozlabs.org
> Signed-off-by: Kefeng Wang
> ---
> arch/powerpc/kernel/setup-common.c | 5 +
> 1 file changed, 1 insertion(+), 4 deletions
Hi Bharata,
Bharata B Rao writes:
> Make GTSE an MMU feature and enable it by default for radix.
> However for guest, conditionally enable it if hypervisor supports
> it via OV5 vector. Let prom_init ask for radix GTSE only if the
> support exists.
>
> Having GTSE as an MMU feature will make i
Introduce notification chain which lets know about uncorrected memory
errors(UE). This would help prospective users in pmem or nvdimm subsystem
to track bad blocks for better handling of persistent memory allocations.
Signed-off-by: Santosh S
Signed-off-by: Ganesh Goudar
---
arch/powerpc/includ
Subscribe to the MCE notification and add the physical address which
generated a memory error to nvdimm bad range.
Reviewed-by: Mahesh Salgaonkar
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/platforms/pseries/papr_scm.c | 98 ++-
1 file changed, 97 insertions(+), 1
Christophe Leroy writes:
> Le 09/07/2020 à 09:56, Santosh Sivaraj a écrit :
>> Subscribe to the MCE notification and add the physical address which
>> generated a memory error to nvdimm bad range.
>>
>> Reviewed-by: Mahesh Salgaonkar
>> Signed-off-by: Santosh
Christophe Leroy writes:
> Le 09/07/2020 à 09:56, Santosh Sivaraj a écrit :
>> Introduce notification chain which lets know about uncorrected memory
>> errors(UE). This would help prospective users in pmem or nvdimm subsystem
>> to track bad blocks for better handling
Introduce notification chain which lets us know about uncorrected memory
errors(UE). This would help prospective users in pmem or nvdimm subsystem
to track bad blocks for better handling of persistent memory allocations.
Signed-off-by: Santosh Sivaraj
Signed-off-by: Ganesh Goudar
---
arch
Subscribe to the MCE notification and add the physical address which
generated a memory error to nvdimm bad range.
Reviewed-by: Mahesh Salgaonkar
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/platforms/pseries/papr_scm.c | 96 ++-
1 file changed, 95 insertions(+), 1
hash_low_64.S was removed in [1] and since flush_hash_page is not called
from any assembly routine.
[1]: commit a43c0eb8364c0 ("powerpc/mm: Convert 4k insert from asm to C")
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/mm/book3s64/hash_utils.c | 4
1 file changed, 4 deletion
The TLB flush optimisation (a46cc7a90f: powerpc/mm/radix: Improve TLB/PWC
flushes) may result in random memory corruption. Any concurrent page-table walk
could end up with a Use-after-Free. Even on UP this might give issues, since
mmu_gather is preemptible these days. An interrupt or preempted task
higher up the tree.
Add a new bit to the flags bitfield in struct mmu_gather so that the
architecture code can operate accordingly if it's the intermediate
levels being invalidated.
Signed-off-by: Peter Zijlstra
Signed-off-by: Will Deacon
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[sa
that are cleared
and provide a means to query the smallest granule required for invalidation.
Signed-off-by: Will Deacon
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for upcoming tlbflush backports]
---
include/asm-generic/tlb.h | 58 +--
mm
require this.
Make it an opt-out, instead of an opt-in.
No change in behavior intended.
Signed-off-by: Peter Zijlstra (Intel)
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: prerequisite for upcoming tlbflush backports]
---
arch/Kconfig | 2 +-
arch/powerpc/Kconfig | 1 +
arch/sparc
83522-2-aneesh.ku...@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported for 4.19 stable]
---
arch/powerpc/Kconfig | 2 +-
arch/powerpc/include/asm/book3s/32/pgalloc.h | 8
arch/powerpc/include/asm/book3s/
-aneesh.ku...@linux.ibm.com
Fixes: a46cc7a90fd8 ("powerpc/mm/radix: Improve TLB/PWC flushes")
Signed-off-by: Peter Zijlstra (Intel)
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported to 4.19 stable]
---
arch/Kconfig| 3 ---
arch/powerpc/Kconfig
ibm.com
Signed-off-by: Peter Zijlstra (Intel)
Signed-off-by: Aneesh Kumar K.V
Reported-by: "Aneesh Kumar K.V"
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
[santosh: backported to 4.19 stable]
---
include/asm-generic/tlb.h | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --gi
nlikely to be a
problem for anyone in practice, unless they've hacked their kernel to
build it !SMP."
Link:
http://lkml.kernel.org/r/20200116064531.483522-2-aneesh.ku...@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
-aneesh.ku...@linux.ibm.com
Fixes: a46cc7a90fd8 ("powerpc/mm/radix: Improve TLB/PWC flushes")
Signed-off-by: Peter Zijlstra (Intel)
Cc: # 4.19
Signed-off-by: Santosh Sivaraj
---
arch/Kconfig| 3 ---
arch/powerpc/include/asm/tlb.h | 11 +++
arch/sparc/inclu
: Naveen N. Rao
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/kernel/Makefile | 2 --
arch/powerpc/kernel/time.c | 6 +++---
2 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index e132902..0845eeb 100644
--- a/arch/powerpc
-by: Naveen N. Rao
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/kernel/Makefile | 2 --
arch/powerpc/kernel/time.c | 6 +++---
2 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index e132902..0845eeb 100644
--- a/arch
During secondary start, we do not need to BUG_ON if an invalid CPU number
is passed. We alreay print an error if secondary cannot be started, so
just return an error instead.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/kernel/smp.c| 3 ++-
arch/powerpc/platforms/cell/smp.c
During secondary start, we do not need to BUG_ON if an invalid CPU number
is passed. We already print an error if secondary cannot be started, so
just return an error instead.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/kernel/smp.c| 3 ++-
arch/powerpc/platforms/cell/smp.c
nr_cpu_ids can be limited by nr_cpus boot parameter, whereas NR_CPUS is a
compile time constant, which shouldn't be compared against during cpu kick.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/kernel/smp.c| 2 +-
arch/powerpc/platforms/cell/smp.c| 2 +-
arch/po
* Abdul Haleem wrote (on 2017-07-03 11:25:18
+0530):
> Hi,
>
> Today's next-20170630 on powerpc shows warnings in dmesg when SMT is
> disabled.
Fix provided by Nick: https://lkml.org/lkml/2017/6/30/143
Thanks,
Santosh
>
> Test: SMT off
> kernel: 4.12.0-rc7-next-20170630
> Machine: Power 8 B
Check for validity of cpu before calling get_hard_smp_processor_id.
Found with coverity.
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/platforms/powernv/smp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/smp.c
b/arch/powerpc/platforms
: syscall: 1347 nsec/call
clock-gettime-monotonic-coarse:libc: 187 nsec/call
clock-gettime-monotonic-coarse:vdso: 125 nsec/call
Used https://github.com/nlynch-mentor/vdsotest.git for the benchmarks.
CC: Benjamin Herrenschmidt
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/include/asm
* Michael Ellerman wrote (on 2017-07-20 23:18:26 +1000):
> Santosh Sivaraj writes:
>
> > Current vDSO64 implementation does not have support for coarse
> > clocks (CLOCK_MONOTONIC_COARSE, CLOCK_REALTIME_COARSE), for which it falls
> > back to system call. Below is a ben
: syscall: 1347 nsec/call
clock-gettime-monotonic-coarse:libc: 187 nsec/call
clock-gettime-monotonic-coarse:vdso: 125 nsec/call
Used https://github.com/nlynch-mentor/vdsotest.git for the benchmarks.
CC: Benjamin Herrenschmidt
Signed-off-by: Santosh Sivaraj
---
V2 update: moved syscall
dereferences a kernel pointer if it's within the kernel's .opd
> section.
>
> - dereference_module_function_descriptor(module, addr)
> dereference a module pointer if it's within the module's .opd
> section.
>
>
> *** A
* Madhavan Srinivasan wrote (on 2017-10-03 12:25:15
+):
> Most of the power processor generation performance monitoring
> unit (PMU) driver code is bundled in the kernel and one of those
> is enabled/registered based on the oprofile_cpu_type check at
> the boot.
>
> But things get little tr
value.
>
>
>
> Signed-off-by: Anju T Sudhakar
Reviewed-by: Santosh Sivaraj
> ---
> arch/powerpc/perf/imc-pmu.c | 28
> 1 file changed, 28 insertions(
* Naveen N. Rao wrote (on 2017-10-06 11:25:28
+):
> On 2017/09/18 09:23AM, Santosh Sivaraj wrote:
> > Current vDSO64 implementation does not have support for coarse clocks
> > (CLOCK_MONOTONIC_COARSE, CLOCK_REALTIME_COARSE), for which it falls back
> > to system
* Naveen N. Rao wrote (on 2017-10-06 09:28:30
+):
> On 2017/09/18 09:23AM, Santosh Sivaraj wrote:
> > Current vDSO64 implementation does not have support for coarse clocks
> > (CLOCK_MONOTONIC_COARSE, CLOCK_REALTIME_COARSE), for which it falls back
> > to system
/call
clock-gettime-monotonic-coarse:vdso: 11 nsec/call
CC: Benjamin Herrenschmidt
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/kernel/asm-offsets.c | 2 +
arch/powerpc/kernel/vdso64/gettimeofday.S | 67 ++-
2 files changed, 58 insertions(+), 11
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