From: Anshuman Khandual
CONFIG_PPC_UV adds support for ultravisor.
Signed-off-by: Anshuman Khandual
Signed-off-by: Bharata B Rao
Signed-off-by: Ram Pai
[ Update config help and commit message ]
Signed-off-by: Claudio Carvalho
Reviewed-by: Sukadev Bhattiprolu
---
arch/powerpc/Kconfig | 17 +
Add support for reset of secure guest via a new ioctl KVM_PPC_SVM_OFF.
This ioctl will be issued by QEMU during reset and includes the
the following steps:
- Ask UV to terminate the guest via UV_SVM_TERMINATE ucall
- Unpin the VPA pages so that they can be migrated back to secure
side when guest
- After the guest becomes secure, when we handle a page fault of a page
belonging to SVM in HV, send that page to UV via UV_PAGE_IN.
- Whenever a page is unmapped on the HV side, inform UV via UV_PAGE_INVAL.
- Ensure all those routines that walk the secondary page tables of
the guest don't do s
Register the new memslot with UV during plug and unregister
the memslot during unplug.
Signed-off-by: Bharata B Rao
Acked-by: Paul Mackerras
Reviewed-by: Sukadev Bhattiprolu
---
arch/powerpc/include/asm/ultravisor-api.h | 1 +
arch/powerpc/include/asm/ultravisor.h | 5 +
arch/powerpc
H_SVM_INIT_START: Initiate securing a VM
H_SVM_INIT_DONE: Conclude securing a VM
As part of H_SVM_INIT_START, register all existing memslots with
the UV. H_SVM_INIT_DONE call by UV informs HV that transition of
the guest to secure mode is complete.
These two states (transition to secure mode STAR
A secure guest will share some of its pages with hypervisor (Eg. virtio
bounce buffers etc). Support sharing of pages between hypervisor and
ultravisor.
Shared page is reachable via both HV and UV side page tables. Once a
secure page is converted to shared page, the device page that represents
the
Manage migration of pages betwen normal and secure memory of secure
guest by implementing H_SVM_PAGE_IN and H_SVM_PAGE_OUT hcalls.
H_SVM_PAGE_IN: Move the content of a normal page to secure page
H_SVM_PAGE_OUT: Move the content of a secure page to normal page
Private ZONE_DEVICE memory equal to t
From: Suraj Jitindar Singh
The rmap array in the guest memslot is an array of size number of guest
pages, allocated at memslot creation time. Each rmap entry in this array
is used to store information about the guest page to which it
corresponds. For example for a hpt guest it is used to store a
[The main change in this version is the introduction of new
locking to prevent concurrent page-in and page-out calls. More
details about this are present in patch 2/8]
Hi,
A pseries guest can be run as a secure guest on Ultravisor-enabled
POWER platforms. On such platforms, this driver will be us
> > >
> > > > > > > > >
> > > > > > > > > The 'fsl,ippdexpcr-alt-addr' property is used to handle
> > > > > > > > > an errata
> > > > > > > > > A-008646 on LS1021A
> > > > > > > > >
> > > > > > > > > Signed-off-by: Biwen Li
> > > > > > > > > ---
> > > > > > > > > Change in v3:
> > > > > > > > >
On the 8xx, signals are generated after executing the instruction.
So no need to manually single-step on 8xx.
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 26 ++-
1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/tools/testing/self
So far we used to ignore exception if dar points outside of user
specified range. But now we are ignoring it only if actual load/
store range does not overlap with user specified range. Include
selftests for the same:
# ./tools/testing/selftests/powerpc/ptrace/perf-hwbreak
...
TESTED: No ove
ptrace-hwbreak.c selftest is logically broken. On powerpc, when
watchpoint is created with ptrace, signals are generated before
executing the instruction and user has to manually singlestep
the instruction with watchpoint disabled, which selftest never
does and thus it keeps on getting the signal a
On Powerpc, watchpoint match range is double-word granular. On a
watchpoint hit, DAR is set to the first byte of overlap between
actual access and watched range. And thus it's quite possible that
DAR does not point inside user specified range. Ex, say user creates
a watchpoint with address range 0x
Watchpoint match range is always doubleword(8 bytes) aligned on
powerpc. If the given range is crossing doubleword boundary, we
need to increase the length such that next doubleword also get
covered. Ex,
address len = 6 bytes
|=.
|v--|--v-
v3: https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-July/193339.html
v3->v4:
- Instead of considering exception as extraneous when dar is outside of
user specified range, analyse the instruction and check for overlap
between user specified range and actual load/store range.
- Add self
> >
> > > > > > > >
> > > > > > > > The 'fsl,ippdexpcr-alt-addr' property is used to handle an
> > > > > > > > errata
> > > > > > > > A-008646 on LS1021A
> > > > > > > >
> > > > > > > > Signed-off-by: Biwen Li
> > > > > > > > ---
> > > > > > > > Change in v3:
> > > > > > > > - rename prope
> -Original Message-
> From: Biwen Li
> Sent: Tuesday, September 24, 2019 10:47 PM
> To: Leo Li ; shawn...@kernel.org;
> robh...@kernel.org; mark.rutl...@arm.com; Ran Wang
>
> Cc: linuxppc-dev@lists.ozlabs.org; linux-arm-ker...@lists.infradead.org;
> linux-ker...@vger.kernel.org; device
> > > > > >
> > > > > > The 'fsl,ippdexpcr-alt-addr' property is used to handle an
> > > > > > errata
> > > > > > A-008646 on LS1021A
> > > > > >
> > > > > > Signed-off-by: Biwen Li
> > > > > > ---
> > > > > > Change in v3:
> > > > > > - rename property name
> > > > > > fsl,rcpm-scfg ->
On 09/24/2019 06:01 PM, Mike Rapoport wrote:
> On Tue, Sep 24, 2019 at 02:51:01PM +0300, Kirill A. Shutemov wrote:
>> On Fri, Sep 20, 2019 at 12:03:21PM +0530, Anshuman Khandual wrote:
>>> This series adds a test validation for architecture exported page table
>>> helpers. Patch in the series ad
> -Original Message-
> From: Biwen Li
> Sent: Tuesday, September 24, 2019 10:30 PM
> To: Leo Li ; shawn...@kernel.org;
> robh...@kernel.org; mark.rutl...@arm.com; Ran Wang
>
> Cc: linuxppc-dev@lists.ozlabs.org; linux-arm-ker...@lists.infradead.org;
> linux-ker...@vger.kernel.org; device
Hi
> On Tue, Sep 24, 2019 at 06:52:35PM +0800, Shengjiu Wang wrote:
> > There is error "aplay: pcm_write:2023: write error: Input/output error"
> > on i.MX8QM/i.MX8QXP platform for S24_3LE format.
> >
> > In i.MX8QM/i.MX8QXP, the DMA is EDMA, which don't support 24bit
> > sample, but we didn't add
> > > >
> > > > The 'fsl,ippdexpcr-alt-addr' property is used to handle an errata
> > > > A-008646 on LS1021A
> > > >
> > > > Signed-off-by: Biwen Li
> > > > ---
> > > > Change in v3:
> > > > - rename property name
> > > > fsl,rcpm-scfg -> fsl,ippdexpcr-alt-addr
> > > >
> > > > C
> -Original Message-
> From: Biwen Li
> Sent: Tuesday, September 24, 2019 10:13 PM
> To: Leo Li ; shawn...@kernel.org;
> robh...@kernel.org; mark.rutl...@arm.com; Ran Wang
>
> Cc: linuxppc-dev@lists.ozlabs.org; linux-arm-ker...@lists.infradead.org;
> linux-ker...@vger.kernel.org; device
> >
> > The 'fsl,ippdexpcr-alt-addr' property is used to handle an errata
> > A-008646 on LS1021A
> >
> > Signed-off-by: Biwen Li
> > ---
> > Change in v3:
> > - rename property name
> > fsl,rcpm-scfg -> fsl,ippdexpcr-alt-addr
> >
> > Change in v2:
> > - update desc of the property '
On 24/09/2019 16:39, Frederic Barrat wrote:
>
>
> Le 24/09/2019 à 06:24, Alexey Kardashevskiy a écrit :
>> Hi Fred,
>>
>> what is this made against of? It does not apply on the master. Thanks,
>
> It applies on v5.3. And I can see there's a conflict with the current
> state in the merge windo
On 9/24/19 2:24 PM, Leonardo Bras wrote:
> If a process (qemu) with a lot of CPUs (128) try to munmap() a large
> chunk of memory (496GB) mapped with THP, it takes an average of 275
> seconds, which can cause a lot of problems to the load (in qemu case,
> the guest will lock for this time).
>
> Tr
On Tue, Sep 24, 2019 at 06:52:34PM +0800, Shengjiu Wang wrote:
> When set the runtime hardware parameters, we may need to query
> the capability of DMA to complete the parameters.
>
> This patch is to Extract this operation from
> dmaengine_pcm_set_runtime_hwparams function to a separate function
On Tue, Sep 24, 2019 at 06:52:35PM +0800, Shengjiu Wang wrote:
> There is error "aplay: pcm_write:2023: write error: Input/output error"
> on i.MX8QM/i.MX8QXP platform for S24_3LE format.
>
> In i.MX8QM/i.MX8QXP, the DMA is EDMA, which don't support 24bit
> sample, but we didn't add any constraint
Skips slow part of serialize_against_pte_lookup if there is no running
lockless pagetable walk.
Signed-off-by: Leonardo Bras
---
arch/powerpc/mm/book3s64/pgtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/pgtable.c
b/arch/powerpc/mm/book3s64
Applies the counting-based method for monitoring all book3s_64-related
functions that do lockless pagetable walks.
Signed-off-by: Leonardo Bras
---
arch/powerpc/kvm/book3s_64_mmu_hv.c| 2 ++
arch/powerpc/kvm/book3s_64_mmu_radix.c | 20 ++--
arch/powerpc/kvm/book3s_64_vio_hv.
Enables count-based monitoring method for lockless pagetable walks on
PowerPC book3s_64.
Other architectures/platforms fallback to using generic dummy functions.
Signed-off-by: Leonardo Bras
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 5 +
1 file changed, 5 insertions(+)
diff --git
Applies the counting-based method for monitoring lockless pgtable walks on
kvmppc_e500_shadow_map().
Signed-off-by: Leonardo Bras
---
arch/powerpc/kvm/e500_mmu_host.c | 4
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index
Applies the counting-based method for monitoring all book3s_hv related
functions that do lockless pagetable walks.
Signed-off-by: Leonardo Bras
---
arch/powerpc/kvm/book3s_hv_nested.c | 8
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 9 -
2 files changed, 16 insertions(+), 1 deletion(-
Applies the counting-based method for monitoring lockless pgtable walks on
read_user_stack_slow.
Signed-off-by: Leonardo Bras
---
arch/powerpc/perf/callchain.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c
in
Applies the counting-based method for monitoring all hash-related functions
that do lockless pagetable walks.
Signed-off-by: Leonardo Bras
---
arch/powerpc/mm/book3s64/hash_tlb.c | 2 ++
arch/powerpc/mm/book3s64/hash_utils.c | 7 +++
2 files changed, 9 insertions(+)
diff --git a/arch/powe
As decribed, gup_pgd_range is a lockless pagetable walk. So, in order to
monitor against THP split/collapse with the couting method, it's necessary
to bound it with {start,end}_lockless_pgtbl_walk.
There are dummy functions, so it is not going to add any overhead on archs
that don't use this metho
There is a need to monitor lockless pagetable walks, in order to avoid
doing THP splitting/collapsing during them.
Some methods rely on local_irq_{save,restore}, but that can be slow on
cases with a lot of cpus are used for the process.
In order to speedup these cases, I propose a refcount-based
Applies the counting-based method for monitoring lockless pgtable walks on
addr_to_pfn().
Signed-off-by: Leonardo Bras
---
arch/powerpc/kernel/mce_power.c | 13 ++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_
It's necessary to monitor lockless pagetable walks, in order to avoid doing
THP splitting/collapsing during them.
Some methods rely on local_irq_{save,restore}, but that can be slow on
cases with a lot of cpus are used for the process.
In order to speedup some cases, I propose a refcount-based ap
If a process (qemu) with a lot of CPUs (128) try to munmap() a large
chunk of memory (496GB) mapped with THP, it takes an average of 275
seconds, which can cause a lot of problems to the load (in qemu case,
the guest will lock for this time).
Trying to find the source of this bug, I found out most
John Hubbard writes:
>> Is that what you meant?
>
> Yes.
>
I am still trying to understand this issue.
I am also analyzing some cases where interrupt disable is not done
before the lockless pagetable walk (patch 3 discussion).
But given I forgot to add the mm mailing list before, I think it wo
John Hubbard writes:
> Also, which tree do these patches apply to, please?
I will send a v3 that applies directly over v5.3, and make sure to
include mm mailing list.
Thanks!
signature.asc
Description: This is a digitally signed message part
On Tue, 24 Sep 2019 15:33:28 +1000
Paul Mackerras wrote:
> On Mon, Sep 23, 2019 at 05:43:48PM +0200, Greg Kurz wrote:
> > We currently prevent userspace to connect a new vCPU if we already have
> > one with the same vCPU id. This is good but unfortunately not enough,
> > because VP ids derive fro
On Mon, Sep 23, 2019 at 9:25 PM Aneesh Kumar K.V
wrote:
>
> In later patch, we want to use hash_transparent_hugepage() in a kernel module.
> Export two related functions.
>
Looks good, thanks.
From: Nathan Lynch
[ Upstream commit 92c94dfb69e350471473fd3075c74bc68150879e ]
prep_irq_for_idle() is intended to be called before entering
H_CEDE (and it is used by the pseries cpuidle driver). However the
default pseries idle routine does not call it, leading to mismanaged
lazy irq state when
From: Nicholas Piggin
[ Upstream commit 0b66370c61fcf5fcc1d6901013e110284da6e2bb ]
Bare metal machine checks run an "early" handler in real mode before
running the main handler which reports the event.
The main handler runs exactly as a normal interrupt handler, after the
"windup" which sets re
From: Sam Bobroff
[ Upstream commit aa06e3d60e245284d1e55497eb3108828092818d ]
The EEH_DEV_NO_HANDLER flag is used by the EEH system to prevent the
use of driver callbacks in drivers that have been bound part way
through the recovery process. This is necessary to prevent later stage
handlers fro
From: Nathan Lynch
[ Upstream commit ccfb5bd71d3d1228090a8633800ae7cdf42a94ac ]
After a partition migration, pseries_devicetree_update() processes
changes to the device tree communicated from the platform to
Linux. This is a relatively heavyweight operation, with multiple
device tree searches, m
From: Christophe Leroy
[ Upstream commit 38a0d0cdb46d3f91534e5b9839ec2d67be14c59d ]
We see warnings such as:
kernel/futex.c: In function 'do_futex':
kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this
function [-Wmaybe-uninitialized]
return oldval == cmparg;
From: Nathan Lynch
[ Upstream commit a6717c01ddc259f6f73364779df058e2c67309f8 ]
The LPAR migration implementation and userspace-initiated cpu hotplug
can interleave their executions like so:
1. Set cpu 7 offline via sysfs.
2. Begin a partition migration, whose implementation requires the OS
From: Nathan Lynch
[ Upstream commit 92c94dfb69e350471473fd3075c74bc68150879e ]
prep_irq_for_idle() is intended to be called before entering
H_CEDE (and it is used by the pseries cpuidle driver). However the
default pseries idle routine does not call it, leading to mismanaged
lazy irq state when
From: Nicholas Piggin
[ Upstream commit 0b66370c61fcf5fcc1d6901013e110284da6e2bb ]
Bare metal machine checks run an "early" handler in real mode before
running the main handler which reports the event.
The main handler runs exactly as a normal interrupt handler, after the
"windup" which sets re
From: Nathan Lynch
[ Upstream commit ccfb5bd71d3d1228090a8633800ae7cdf42a94ac ]
After a partition migration, pseries_devicetree_update() processes
changes to the device tree communicated from the platform to
Linux. This is a relatively heavyweight operation, with multiple
device tree searches, m
From: Christophe Leroy
[ Upstream commit 38a0d0cdb46d3f91534e5b9839ec2d67be14c59d ]
We see warnings such as:
kernel/futex.c: In function 'do_futex':
kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this
function [-Wmaybe-uninitialized]
return oldval == cmparg;
From: Nathan Lynch
[ Upstream commit a6717c01ddc259f6f73364779df058e2c67309f8 ]
The LPAR migration implementation and userspace-initiated cpu hotplug
can interleave their executions like so:
1. Set cpu 7 offline via sysfs.
2. Begin a partition migration, whose implementation requires the OS
From: Nicholas Piggin
[ Upstream commit 0b66370c61fcf5fcc1d6901013e110284da6e2bb ]
Bare metal machine checks run an "early" handler in real mode before
running the main handler which reports the event.
The main handler runs exactly as a normal interrupt handler, after the
"windup" which sets re
From: Nathan Lynch
[ Upstream commit 92c94dfb69e350471473fd3075c74bc68150879e ]
prep_irq_for_idle() is intended to be called before entering
H_CEDE (and it is used by the pseries cpuidle driver). However the
default pseries idle routine does not call it, leading to mismanaged
lazy irq state when
From: Nathan Lynch
[ Upstream commit ccfb5bd71d3d1228090a8633800ae7cdf42a94ac ]
After a partition migration, pseries_devicetree_update() processes
changes to the device tree communicated from the platform to
Linux. This is a relatively heavyweight operation, with multiple
device tree searches, m
From: Nicholas Piggin
[ Upstream commit 6bb25170d7a44ef0ed9677814600f0785e7421d1 ]
pfn_pte is never given a pte above the addressable physical memory
limit, so the masking is redundant. In case of a software bug, it
is not obviously better to silently truncate the pfn than to corrupt
the pte (ei
From: Christophe Leroy
[ Upstream commit 38a0d0cdb46d3f91534e5b9839ec2d67be14c59d ]
We see warnings such as:
kernel/futex.c: In function 'do_futex':
kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this
function [-Wmaybe-uninitialized]
return oldval == cmparg;
From: Nathan Lynch
[ Upstream commit a6717c01ddc259f6f73364779df058e2c67309f8 ]
The LPAR migration implementation and userspace-initiated cpu hotplug
can interleave their executions like so:
1. Set cpu 7 offline via sysfs.
2. Begin a partition migration, whose implementation requires the OS
From: Cédric Le Goater
[ Upstream commit c3e0dbd7f780a58c4695f1cd8fc8afde80376737 ]
Currently, the xmon 'dx' command calls OPAL to dump the XIVE state in
the OPAL logs and also outputs some of the fields of the internal XIVE
structures in Linux. The OPAL calls can only be done on baremetal
(Powe
From: Ganesh Goudar
[ Upstream commit e7ca44ed3ba77fc26cf32650bb71584896662474 ]
Since commit 4388c9b3a6ee ("powerpc: Do not send system reset request
through the oops path"), pstore dmesg file is not updated when dump is
triggered from HMC. This commit modified system reset (sreset) handler
to
From: Nathan Lynch
[ Upstream commit 92c94dfb69e350471473fd3075c74bc68150879e ]
prep_irq_for_idle() is intended to be called before entering
H_CEDE (and it is used by the pseries cpuidle driver). However the
default pseries idle routine does not call it, leading to mismanaged
lazy irq state when
From: Madhavan Srinivasan
[ Upstream commit 41ba17f20ea835c489e77bd54e2da73184e22060 ]
Commit <684d984038aa> ('powerpc/powernv: Add debugfs interface for
imc-mode and imc') added debugfs interface for the nest imc pmu
devices to support changing of different ucode modes. Primarily adding
this ca
From: Nicholas Piggin
[ Upstream commit 0b66370c61fcf5fcc1d6901013e110284da6e2bb ]
Bare metal machine checks run an "early" handler in real mode before
running the main handler which reports the event.
The main handler runs exactly as a normal interrupt handler, after the
"windup" which sets re
From: Sam Bobroff
[ Upstream commit aa06e3d60e245284d1e55497eb3108828092818d ]
The EEH_DEV_NO_HANDLER flag is used by the EEH system to prevent the
use of driver callbacks in drivers that have been bound part way
through the recovery process. This is necessary to prevent later stage
handlers fro
From: Nathan Lynch
[ Upstream commit ccfb5bd71d3d1228090a8633800ae7cdf42a94ac ]
After a partition migration, pseries_devicetree_update() processes
changes to the device tree communicated from the platform to
Linux. This is a relatively heavyweight operation, with multiple
device tree searches, m
From: Nicholas Piggin
[ Upstream commit 6bb25170d7a44ef0ed9677814600f0785e7421d1 ]
pfn_pte is never given a pte above the addressable physical memory
limit, so the masking is redundant. In case of a software bug, it
is not obviously better to silently truncate the pfn than to corrupt
the pte (ei
From: Christophe Leroy
[ Upstream commit 38a0d0cdb46d3f91534e5b9839ec2d67be14c59d ]
We see warnings such as:
kernel/futex.c: In function 'do_futex':
kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this
function [-Wmaybe-uninitialized]
return oldval == cmparg;
From: Nathan Lynch
[ Upstream commit a6717c01ddc259f6f73364779df058e2c67309f8 ]
The LPAR migration implementation and userspace-initiated cpu hotplug
can interleave their executions like so:
1. Set cpu 7 offline via sysfs.
2. Begin a partition migration, whose implementation requires the OS
From: Cédric Le Goater
[ Upstream commit c3e0dbd7f780a58c4695f1cd8fc8afde80376737 ]
Currently, the xmon 'dx' command calls OPAL to dump the XIVE state in
the OPAL logs and also outputs some of the fields of the internal XIVE
structures in Linux. The OPAL calls can only be done on baremetal
(Powe
From: Alexey Kardashevskiy
[ Upstream commit c37c792dec0929dbb6360a609fb00fa20bb16fc2 ]
We allocate only the first level of multilevel TCE tables for KVM
already (alloc_userspace_copy==true), and the rest is allocated on demand.
This is not enabled though for bare metal.
This removes the KVM li
From: Nathan Chancellor
[ Upstream commit 0df3e42167caaf9f8c7b64de3da40a459979afe8 ]
When building with -Wsometimes-uninitialized, clang warns:
drivers/pci/hotplug/rpaphp_core.c:243:14: warning: variable 'fndit' is
used uninitialized whenever 'for' loop exits because its condition is
false [-Ws
From: Ganesh Goudar
[ Upstream commit e7ca44ed3ba77fc26cf32650bb71584896662474 ]
Since commit 4388c9b3a6ee ("powerpc: Do not send system reset request
through the oops path"), pstore dmesg file is not updated when dump is
triggered from HMC. This commit modified system reset (sreset) handler
to
From: Nathan Lynch
[ Upstream commit 92c94dfb69e350471473fd3075c74bc68150879e ]
prep_irq_for_idle() is intended to be called before entering
H_CEDE (and it is used by the pseries cpuidle driver). However the
default pseries idle routine does not call it, leading to mismanaged
lazy irq state when
From: Madhavan Srinivasan
[ Upstream commit 41ba17f20ea835c489e77bd54e2da73184e22060 ]
Commit <684d984038aa> ('powerpc/powernv: Add debugfs interface for
imc-mode and imc') added debugfs interface for the nest imc pmu
devices to support changing of different ucode modes. Primarily adding
this ca
From: Oliver O'Halloran
[ Upstream commit 799abe283e5103d48e079149579b4f167c95ea0e ]
When the last device in an eeh_pe is removed the eeh_pe structure itself
(and any empty parents) are freed since they are no longer needed. This
results in a crash when a hotplug driver is involved since the fol
From: Nicholas Piggin
[ Upstream commit 0b66370c61fcf5fcc1d6901013e110284da6e2bb ]
Bare metal machine checks run an "early" handler in real mode before
running the main handler which reports the event.
The main handler runs exactly as a normal interrupt handler, after the
"windup" which sets re
From: Gustavo Romero
[ Upstream commit 6652bf6408895b09d31fd4128a1589a1a0672823 ]
TM test tm-unavailable must take into account aborts due to host aborting
a transactin because of a facility unavailable exception, just like it
already does for aborts on reschedules (TM_CAUSE_KVM_RESCHED).
Repor
From: Sam Bobroff
[ Upstream commit aa06e3d60e245284d1e55497eb3108828092818d ]
The EEH_DEV_NO_HANDLER flag is used by the EEH system to prevent the
use of driver callbacks in drivers that have been bound part way
through the recovery process. This is necessary to prevent later stage
handlers fro
From: Nicholas Piggin
[ Upstream commit 10c4bd7cd28e77aeb8cfa65b23cb3c632ede2a49 ]
The alloc_pages_node return value should be tested for failure
before being passed to page_address.
Tested-by: Anju T Sudhakar
Signed-off-by: Nicholas Piggin
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Michae
From: Nathan Lynch
[ Upstream commit ccfb5bd71d3d1228090a8633800ae7cdf42a94ac ]
After a partition migration, pseries_devicetree_update() processes
changes to the device tree communicated from the platform to
Linux. This is a relatively heavyweight operation, with multiple
device tree searches, m
From: Nicholas Piggin
[ Upstream commit 8f51e3929470942e6a8744061254fdeef646cd36 ]
create_physical_mapping expects physical addresses, but creating and
splitting these mappings after boot is supplying virtual (effective)
addresses. This can be irritated by booting with mem= to limit memory
then
From: Nicholas Piggin
[ Upstream commit 6bb25170d7a44ef0ed9677814600f0785e7421d1 ]
pfn_pte is never given a pte above the addressable physical memory
limit, so the masking is redundant. In case of a software bug, it
is not obviously better to silently truncate the pfn than to corrupt
the pte (ei
From: Christophe Leroy
[ Upstream commit 38a0d0cdb46d3f91534e5b9839ec2d67be14c59d ]
We see warnings such as:
kernel/futex.c: In function 'do_futex':
kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this
function [-Wmaybe-uninitialized]
return oldval == cmparg;
From: Nathan Lynch
[ Upstream commit a6717c01ddc259f6f73364779df058e2c67309f8 ]
The LPAR migration implementation and userspace-initiated cpu hotplug
can interleave their executions like so:
1. Set cpu 7 offline via sysfs.
2. Begin a partition migration, whose implementation requires the OS
From: Cédric Le Goater
[ Upstream commit c3e0dbd7f780a58c4695f1cd8fc8afde80376737 ]
Currently, the xmon 'dx' command calls OPAL to dump the XIVE state in
the OPAL logs and also outputs some of the fields of the internal XIVE
structures in Linux. The OPAL calls can only be done on baremetal
(Powe
From: Alexey Kardashevskiy
[ Upstream commit c37c792dec0929dbb6360a609fb00fa20bb16fc2 ]
We allocate only the first level of multilevel TCE tables for KVM
already (alloc_userspace_copy==true), and the rest is allocated on demand.
This is not enabled though for bare metal.
This removes the KVM li
From: Nathan Chancellor
[ Upstream commit 0df3e42167caaf9f8c7b64de3da40a459979afe8 ]
When building with -Wsometimes-uninitialized, clang warns:
drivers/pci/hotplug/rpaphp_core.c:243:14: warning: variable 'fndit' is
used uninitialized whenever 'for' loop exits because its condition is
false [-Ws
From: Ganesh Goudar
[ Upstream commit e7ca44ed3ba77fc26cf32650bb71584896662474 ]
Since commit 4388c9b3a6ee ("powerpc: Do not send system reset request
through the oops path"), pstore dmesg file is not updated when dump is
triggered from HMC. This commit modified system reset (sreset) handler
to
From: Nathan Lynch
[ Upstream commit 92c94dfb69e350471473fd3075c74bc68150879e ]
prep_irq_for_idle() is intended to be called before entering
H_CEDE (and it is used by the pseries cpuidle driver). However the
default pseries idle routine does not call it, leading to mismanaged
lazy irq state when
From: Madhavan Srinivasan
[ Upstream commit 41ba17f20ea835c489e77bd54e2da73184e22060 ]
Commit <684d984038aa> ('powerpc/powernv: Add debugfs interface for
imc-mode and imc') added debugfs interface for the nest imc pmu
devices to support changing of different ucode modes. Primarily adding
this ca
From: Oliver O'Halloran
[ Upstream commit 799abe283e5103d48e079149579b4f167c95ea0e ]
When the last device in an eeh_pe is removed the eeh_pe structure itself
(and any empty parents) are freed since they are no longer needed. This
results in a crash when a hotplug driver is involved since the fol
From: Nicholas Piggin
[ Upstream commit 0b66370c61fcf5fcc1d6901013e110284da6e2bb ]
Bare metal machine checks run an "early" handler in real mode before
running the main handler which reports the event.
The main handler runs exactly as a normal interrupt handler, after the
"windup" which sets re
From: Gustavo Romero
[ Upstream commit 6652bf6408895b09d31fd4128a1589a1a0672823 ]
TM test tm-unavailable must take into account aborts due to host aborting
a transactin because of a facility unavailable exception, just like it
already does for aborts on reschedules (TM_CAUSE_KVM_RESCHED).
Repor
From: Sam Bobroff
[ Upstream commit aa06e3d60e245284d1e55497eb3108828092818d ]
The EEH_DEV_NO_HANDLER flag is used by the EEH system to prevent the
use of driver callbacks in drivers that have been bound part way
through the recovery process. This is necessary to prevent later stage
handlers fro
From: Nicholas Piggin
[ Upstream commit 10c4bd7cd28e77aeb8cfa65b23cb3c632ede2a49 ]
The alloc_pages_node return value should be tested for failure
before being passed to page_address.
Tested-by: Anju T Sudhakar
Signed-off-by: Nicholas Piggin
Reviewed-by: Aneesh Kumar K.V
Signed-off-by: Michae
From: Nathan Lynch
[ Upstream commit ccfb5bd71d3d1228090a8633800ae7cdf42a94ac ]
After a partition migration, pseries_devicetree_update() processes
changes to the device tree communicated from the platform to
Linux. This is a relatively heavyweight operation, with multiple
device tree searches, m
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