Commit ddf35cf3764b ("powerpc: Use barrier_nospec in copy_from_user()")
Added barrier_nospec before loading from user-controller pointers.
The intention was to order the load from the potentially user-controlled
pointer vs a previous branch based on an access_ok() check or similar.
In order to
On Thu, Nov 15, 2018 at 05:16:01PM -0600, Alexandru Gagniuc wrote:
> Thanks to Keith for pointing out that it doesn't make sense to disable
> AER services when only one device has a FIRMWARE_FIRST HEST.
>
> AER ownership is an interesting issue brought in by FFS (firmware-first)
> model. In a
This patch adds Kernel Userspace Access Protection on the 8xx.
When a page is RO or RW, it is set RO or RW for Key 0 and NA
for Key 1.
Up to now, the User group is defined with Key 0 for both User and
Supervisor.
By changing the group to Key 0 for User and Key 1 for Supervisor,
this patch
This patch implements Kernel Userspace Access Protection for
book3s/32.
Due to limitations of the processor page protection capabilities,
the protection is only against writing. read protection cannot be
achieved using page protection.
The previous patch modifies the page protection so that RW
This patch prepares Kernel Userspace Access Protection for
book3s/32.
Due to limitations of the processor page protection capabilities,
the protection is only against writing. read protection cannot be
achieved using page protection.
book3s/32 provides the following values for PP bits:
PP00
This patch adds ASM macros for saving, restoring and checking
the KUAP state, and modifies setup_32 to call them on exceptions
from kernel.
The macros are defined as empty by default for when CONFIG_PPC_KUAP
is not selected and/or for platforms which don't handle (yet) KUAP.
Signed-off-by:
This series intend to implement Kernel Userspace protection for PPC32.
It comes on top of the v4 series for Radix.
Christophe Leroy (6):
powerpc/8xx: Only define APG0 and APG1
powerpc/8xx: Add Kernel Userspace Execution Prevention
powerpc/32: Prepare for Kernel Userspace Access Protection
Squashed version of the v4 series, not intended to be merged as is.
Signed-off-by: Christophe Leroy
---
Documentation/admin-guide/kernel-parameters.txt | 4 +-
arch/powerpc/include/asm/book3s/64/kup-radix.h | 79 +
arch/powerpc/include/asm/exception-64s.h| 2 +
This patch adds Kernel Userspace Execution Prevention on the 8xx.
When a page is Executable, it is set Executable for Key 0 and NX
for Key 1.
Up to now, the User group is defined with Key 0 for both User and
Supervisor.
By changing the group to Key 0 for User and Key 1 for Supervisor,
this
Since the 8xx implements hardware page table walk assistance,
the PGD entries always point to a 4k aligned page, so the 2 upper
bit of the APG are not clobbered anymore and remain 0. Therefore
only APG0 and APG1 are used and need a definition. We set the
other APG to the lowest permission level.
On 3/5/19 11:04 AM, Oliver wrote:
> On Sat, Mar 2, 2019 at 3:04 AM Sergey Miroshnichenko
> wrote:
>>
>> If a struct pci_dn hasn't yet been created for the PCIe device (there was
>> no DT node for it), allocate this structure and fill with info read from
>> the device directly.
>>
>>
On 3/5/19 9:14 AM, Oliver wrote:
> On Sat, Mar 2, 2019 at 3:04 AM Sergey Miroshnichenko
> wrote:
>>
>> Reading an empty slot returns all ones, which triggers a false
>> EEH error event on PowerNV. This patch unfreezes the bus where
>> it has happened.
>>
>> Signed-off-by: Sergey Miroshnichenko
On pseries systems, performing changes to a partition's affinity
can result in altering the nodes a CPU is assigned to the
current system. For example, some systems are subject to resource
balancing operations by the operator or control software. In such
environments, system CPUs may be in node
From: Mahesh Salgaonkar
The kcov instrumentation inside SLB routines causes duplicate SLB entries
to be added resulting into SLB multihit machine checks.
Disable kcov instrumentation on slb.o
Signed-off-by: Mahesh Salgaonkar
Acked-by: Andrew Donnellan
---
Change in v2:
- Add comment as
On Mon, Mar 04, 2019 at 08:59:52PM +0100, Laurent Vivier wrote:
> This happens because initially powerpc code computes
> sched_domains_numa_masks of offline nodes as if they were merged with
> node 0 (because firmware doesn't provide the distance information for
> memoryless/cpuless nodes):
>
>
On Sat, Mar 2, 2019 at 3:04 AM Sergey Miroshnichenko
wrote:
>
> If a struct pci_dn hasn't yet been created for the PCIe device (there was
> no DT node for it), allocate this structure and fill with info read from
> the device directly.
>
> Signed-off-by: Sergey Miroshnichenko
> ---
>
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