On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
> On 5/17/21 11:17 AM, Christophe Leroy wrote:
>> +aneesh
>> +linuxppc-dev list
>>
>> Le 17/05/2021 à 07:44, Anshuman Khandual a écrit :
>>> Hello Christophe,
>>>
>>> DEBUG_VM_PGTABLE has now been re-enabled on powerpc recently ? was not
>>> aware abo
Excerpts from Christian Zigotzky's message of May 15, 2021 11:46 pm:
> On 15 May 2021 at 12:08pm Christophe Leroy wrote:
>>
>>
>> Le 15/05/2021 à 11:48, Christian Zigotzky a écrit :
>>> Hi All,
>>>
>>> I bisected today [1] and the bisecting itself was OK but the
>>> reverting of the bad commit doe
Excerpts from Christophe Leroy's message of May 14, 2021 6:28 pm:
> Last part of interrupt_exit_user_prepare() and syscall_exit_prepare()
> are identical.
>
> Create a __interrupt_exit_user_prepare() function that is called by
> both.
>
> Note that it replaces a local_irq_save(flags) by local_irq
On 5/17/21 12:55 PM, Anshuman Khandual wrote:
On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
On 5/17/21 11:17 AM, Christophe Leroy wrote:
+aneesh
+linuxppc-dev list
Le 17/05/2021 à 07:44, Anshuman Khandual a écrit :
Hello Christophe,
DEBUG_VM_PGTABLE has now been re-enabled on powerpc recent
Fix issues that open brace { should be on the previous line,
reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index b6720b
Fix issues of code indent should use tabs, reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 13f63d5..2e5c133 100644
--- a
Fix spaces required around that '=', reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index d0f0253..a1eca9d 100644
--- a/drive
Fix coding style issues of block comments, reported by checkpatch.pl.
Besides, add a period at the end of the sentenses.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 15 ++-
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/hvc/hvc_console.c
Remove trailing whitespace, reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index ddf07ff..13f63d5 100644
--- a/drivers/tty/hv
Remove the repeated words 'no' and 'from', reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index f31efeb..b6720b0 100644
-
Fix "foo * bar" should be "foo *bar", reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index a1eca9d..ddf07ff 100644
--- a/
Add a blank line after declarations, reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index a61cdf0..f31efeb 100644
--- a/drivers/tty/hvc/hvc_c
Delete spaces prohibited after that open parenthesis '(' and
before that close parenthesis ')', reported by checkpatch.pl.
Signed-off-by: Xiaofei Tan
---
drivers/tty/hvc/hvc_console.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/
Fix some issues reported by checkpatch.pl. All of them are
coding style issues, no function changes.
Xiaofei Tan (9):
tty: hvc_console: Fix spaces required around that '='
tty: hvc_console: Fix "foo * bar" should be "foo *bar"
tty: hvc_console: Remove trailing whitespace
tty: hvc_console:
On Sat, May 15, 2021 at 2:57 AM Casey Schaufler wrote:
> On 5/14/2021 8:12 AM, Ondrej Mosnacek wrote:
> > On Wed, May 12, 2021 at 7:12 PM Casey Schaufler
> > wrote:
> >> On 5/12/2021 9:44 AM, Ondrej Mosnacek wrote:
> >>> On Wed, May 12, 2021 at 6:18 PM Casey Schaufler
> >>> wrote:
> On 5/
On 5/15/21 10:05 PM, Guenter Roeck wrote:
On Thu, Apr 22, 2021 at 11:13:19AM +0530, Aneesh Kumar K.V wrote:
No functional change in this patch
Signed-off-by: Aneesh Kumar K.V
---
.../include/asm/book3s/64/tlbflush-radix.h| 19 +++-
arch/powerpc/include/asm/book3s/64/tlbflush.h |
After a LPM, the device tree node ibm,dynamic-reconfiguration-memory may be
updated by the hypervisor in the case the NUMA topology of the LPAR's
memory is updated.
This is handled by the kernel, but the memory's node is not updated because
there is no way to move a memory block between nodes from
Commit 59438b46471a ("security,lockdown,selinux: implement SELinux
lockdown") added an implementation of the locked_down LSM hook to
SELinux, with the aim to restrict which domains are allowed to perform
operations that would breach lockdown.
However, in several places the security_locked_down() h
https://bugzilla.kernel.org/show_bug.cgi?id=206733
Paul Osmialowski (newch...@king.net.pl) changed:
What|Removed |Added
CC||newch...@king.ne
On 17 May 2021 at 09:42am, Nicholas Piggin wrote:
Excerpts from Christian Zigotzky's message of May 15, 2021 11:46 pm:
On 15 May 2021 at 12:08pm Christophe Leroy wrote:
Le 15/05/2021 à 11:48, Christian Zigotzky a écrit :
Hi All,
I bisected today [1] and the bisecting itself was OK but the
re
https://bugzilla.kernel.org/show_bug.cgi?id=213069
Michael Ellerman (mich...@ellerman.id.au) changed:
What|Removed |Added
Status|NEW |ASSIGNED
On 5/17/21 1:14 PM, Aneesh Kumar K.V wrote:
> On 5/17/21 12:55 PM, Anshuman Khandual wrote:
>>
>>
>> On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
>>> On 5/17/21 11:17 AM, Christophe Leroy wrote:
+aneesh
+linuxppc-dev list
Le 17/05/2021 à 07:44, Anshuman Khandual a écrit :
>>>
Ondrej Mosnacek writes:
> Commit 59438b46471a ("security,lockdown,selinux: implement SELinux
> lockdown") added an implementation of the locked_down LSM hook to
> SELinux, with the aim to restrict which domains are allowed to perform
> operations that would breach lockdown.
>
> However, in several
Jordan Niethe writes:
> On Mon, May 17, 2021 at 4:37 PM Christophe Leroy
> wrote:
>> Le 17/05/2021 à 05:28, Jordan Niethe a écrit :
>> > Make module_alloc() use PAGE_KERNEL protections instead of
>> > PAGE_KERNEL_EXEX if Strict Module RWX is enabled.
>> >
>> > Signed-off-by: Jordan Niethe
>> > -
Le 17/05/2021 à 13:01, Michael Ellerman a écrit :
Jordan Niethe writes:
On Mon, May 17, 2021 at 4:37 PM Christophe Leroy
wrote:
Le 17/05/2021 à 05:28, Jordan Niethe a écrit :
Make module_alloc() use PAGE_KERNEL protections instead of
PAGE_KERNEL_EXEX if Strict Module RWX is enabled.
Sign
On 5/17/21 4:23 PM, Anshuman Khandual wrote:
On 5/17/21 1:14 PM, Aneesh Kumar K.V wrote:
On 5/17/21 12:55 PM, Anshuman Khandual wrote:
On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
On 5/17/21 11:17 AM, Christophe Leroy wrote:
+aneesh
+linuxppc-dev list
Le 17/05/2021 à 07:44, Anshuman Khan
Guenter Roeck writes:
> On 3/18/21 10:25 AM, Christophe Leroy wrote:
>> Commit 92c8c16f3457 ("powerpc/embedded6xx: Remove C2K board support")
>> removed the last selector of CONFIG_MV64X60.
>>
>> Therefore CONFIG_MV64X60_WDT cannot be selected anymore and
>> can be removed.
>>
>> Signed-off-by:
The header file is already included above and can be
removed here.
Signed-off-by: Zhen Lei
---
tools/testing/selftests/powerpc/tm/tm-vmx-unavail.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/tools/testing/selftests/powerpc/tm/tm-vmx-unavail.c
b/tools/testing/selftests/powerpc/tm/tm-vmx-
On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
> On 5/17/21 11:17 AM, Christophe Leroy wrote:
>> +aneesh
>> +linuxppc-dev list
>>
>> Le 17/05/2021 à 07:44, Anshuman Khandual a écrit :
>>> Hello Christophe,
>>>
>>> DEBUG_VM_PGTABLE has now been re-enabled on powerpc recently ? was not
>>> aware abo
https://bugzilla.kernel.org/show_bug.cgi?id=213069
--- Comment #3 from Christophe Leroy (christophe.le...@csgroup.eu) ---
Patch proposed by Anshuman, to be tested:
https://lore.kernel.org/linuxppc-dev/bug-213069-206...@https.bugzilla.kernel.org%2F/T/#m82f2974b813c4d3a085b0cd2ac3d5b732a362e68
--
Le 17/05/2021 à 14:49, Anshuman Khandual a écrit :
On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
On 5/17/21 11:17 AM, Christophe Leroy wrote:
+aneesh
+linuxppc-dev list
Le 17/05/2021 à 07:44, Anshuman Khandual a écrit :
Hello Christophe,
DEBUG_VM_PGTABLE has now been re-enabled on powerp
On 5/17/21 6:29 PM, Christophe Leroy wrote:
>
>
> Le 17/05/2021 à 14:49, Anshuman Khandual a écrit :
>>
>>
>> On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
>>> On 5/17/21 11:17 AM, Christophe Leroy wrote:
+aneesh
+linuxppc-dev list
Le 17/05/2021 à 07:44, Anshuman Khandual a
Sathvika Vasireddy wrote:
This adds emulation support for the following instruction:
* Set Boolean (setb)
Signed-off-by: Sathvika Vasireddy
---
arch/powerpc/lib/sstep.c | 22 ++
1 file changed, 22 insertions(+)
Tested-by: Naveen N. Rao
diff --git a/arch/powerpc/lib
Sathvika Vasireddy wrote:
This adds selftests for setb instruction.
Signed-off-by: Sathvika Vasireddy
---
arch/powerpc/include/asm/ppc-opcode.h | 1 +
arch/powerpc/lib/test_emulate_step.c | 29 +
2 files changed, 30 insertions(+)
Tested-by: Naveen N. Rao
di
On 5/17/21 1:40 AM, Aneesh Kumar K.V wrote:
On 5/15/21 10:05 PM, Guenter Roeck wrote:
On Thu, Apr 22, 2021 at 11:13:19AM +0530, Aneesh Kumar K.V wrote:
No functional change in this patch
Signed-off-by: Aneesh Kumar K.V
---
.../include/asm/book3s/64/tlbflush-radix.h | 19 +++-
ar
On 5/17/21 4:17 AM, Michael Ellerman wrote:
Guenter Roeck writes:
On 3/18/21 10:25 AM, Christophe Leroy wrote:
Commit 92c8c16f3457 ("powerpc/embedded6xx: Remove C2K board support")
removed the last selector of CONFIG_MV64X60.
Therefore CONFIG_MV64X60_WDT cannot be selected anymore and
can be
Le 15/03/2021 à 23:03, Nicholas Piggin a écrit :
The msr argument is not used, remove it.
And why not use it instead of re-reading regs->msr ?
Signed-off-by: Nicholas Piggin
---
arch/powerpc/include/asm/asm-prototypes.h | 4 ++--
arch/powerpc/kernel/interrupt.c | 4 ++--
2
Anshuman Khandual writes:
> On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
>> On 5/17/21 11:17 AM, Christophe Leroy wrote:
>>> +aneesh
>>> +linuxppc-dev list
>>>
>>> Le 17/05/2021 à 07:44, Anshuman Khandual a écrit :
Hello Christophe,
DEBUG_VM_PGTABLE has now been re-enabled on power
Guenter Roeck writes:
> On 5/17/21 1:40 AM, Aneesh Kumar K.V wrote:
>> On 5/15/21 10:05 PM, Guenter Roeck wrote:
>>> On Thu, Apr 22, 2021 at 11:13:19AM +0530, Aneesh Kumar K.V wrote:
...
>>> extern void radix__local_flush_all_mm(struct mm_struct *mm);
diff --git a/arch/powerpc/include/as
Le 17/05/2021 à 09:44, Nicholas Piggin a écrit :
Excerpts from Christophe Leroy's message of May 14, 2021 6:28 pm:
Last part of interrupt_exit_user_prepare() and syscall_exit_prepare()
are identical.
Create a __interrupt_exit_user_prepare() function that is called by
both.
Note that it repl
POWER9 and POWER10 asynchronous machine checks due to stores have their
cause reported in SRR1 but SRR1[42] is set, which in other cases
indicates DSISR cause.
Check for these cases and clear SRR1[42], so the cause matching uses
the i-side (SRR1) table.
Cc: Mahesh Salgaonkar
Fixes: 7b9f71f974 ("
Le 15/03/2021 à 23:04, Nicholas Piggin a écrit :
Change the default PPR to userspace to 4 (medium), matching the
normal kernel PPR.
This allows system calls and user interrupts to avoid setting PPR on
entry and exit, providing a significant speedup.
This is a change to the user environment.
On 5/17/21 7:22 PM, Aneesh Kumar K.V wrote:
> Anshuman Khandual writes:
>
>> On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
>>> On 5/17/21 11:17 AM, Christophe Leroy wrote:
+aneesh
+linuxppc-dev list
Le 17/05/2021 à 07:44, Anshuman Khandual a écrit :
> Hello Christophe,
>>
On Mon, May 17, 2021 at 02:37:10PM +0800, Xiaofei Tan wrote:
> Fix coding style issues of block comments, reported by checkpatch.pl.
> Besides, add a period at the end of the sentenses.
>
> Signed-off-by: Xiaofei Tan
> ---
> drivers/tty/hvc/hvc_console.c | 15 ++-
> 1 file changed, 1
On 5/17/21 6:55 AM, Aneesh Kumar K.V wrote:
Guenter Roeck writes:
On 5/17/21 1:40 AM, Aneesh Kumar K.V wrote:
On 5/15/21 10:05 PM, Guenter Roeck wrote:
On Thu, Apr 22, 2021 at 11:13:19AM +0530, Aneesh Kumar K.V wrote:
...
extern void radix__local_flush_all_mm(struct mm_struct *mm);
d
Le 17/05/2021 à 15:12, Anshuman Khandual a écrit :
On 5/17/21 6:29 PM, Christophe Leroy wrote:
Le 17/05/2021 à 14:49, Anshuman Khandual a écrit :
On 5/17/21 11:25 AM, Aneesh Kumar K.V wrote:
On 5/17/21 11:17 AM, Christophe Leroy wrote:
+aneesh
+linuxppc-dev list
Le 17/05/2021 à 07:4
On 2021-05-14 11:24 p.m., Krzysztof Wilczyński wrote:
> The sysfs_emit() and sysfs_emit_at() functions were introduced to make
> it less ambiguous which function is preferred when writing to the output
> buffer in a device attribute's "show" callback [1].
>
> Convert the PCI sysfs object "show"
Hi Logan,
> > The sysfs_emit() and sysfs_emit_at() functions were introduced to make
> > it less ambiguous which function is preferred when writing to the output
> > buffer in a device attribute's "show" callback [1].
> >
> > Convert the PCI sysfs object "show" functions from sprintf(), snprintf(
Hi!
On Mon, May 17, 2021 at 01:23:11PM +1000, Alexey Kardashevskiy wrote:
> On 5/14/21 18:46, Segher Boessenkool wrote:
> >On Fri, May 14, 2021 at 11:42:32AM +0900, Masahiro Yamada wrote:
> >>In my best guess, the reason why powerpc adding the endian flag to CPP
> >>is this line in arch/powerpc/ke
From: Nicholas Piggin
[ Upstream commit 2c8c89b95831f46a2fb31a8d0fef4601694023ce ]
The paravit queued spinlock slow path adds itself to the queue then
calls pv_wait to wait for the lock to become free. This is implemented
by calling H_CONFER to donate cycles.
When hcall tracing is enabled, this
From: Nicholas Piggin
[ Upstream commit 2c8c89b95831f46a2fb31a8d0fef4601694023ce ]
The paravit queued spinlock slow path adds itself to the queue then
calls pv_wait to wait for the lock to become free. This is implemented
by calling H_CONFER to donate cycles.
When hcall tracing is enabled, this
From: Nicholas Piggin
[ Upstream commit 2c8c89b95831f46a2fb31a8d0fef4601694023ce ]
The paravit queued spinlock slow path adds itself to the queue then
calls pv_wait to wait for the lock to become free. This is implemented
by calling H_CONFER to donate cycles.
When hcall tracing is enabled, this
Christophe Leroy writes:
> Le 17/05/2021 à 13:01, Michael Ellerman a écrit :
>> Jordan Niethe writes:
>>> On Mon, May 17, 2021 at 4:37 PM Christophe Leroy
>>> wrote:
Le 17/05/2021 à 05:28, Jordan Niethe a écrit :
> Make module_alloc() use PAGE_KERNEL protections instead of
> PAGE_KE
Hi Johan,
Thanks for reviewing this patch.
On 2021/5/17 22:15, Johan Hovold wrote:
On Mon, May 17, 2021 at 02:37:10PM +0800, Xiaofei Tan wrote:
Fix coding style issues of block comments, reported by checkpatch.pl.
Besides, add a period at the end of the sentenses.
Signed-off-by: Xiaofei Tan
On Thu, Apr 22, 2021 at 6:13 PM Oliver O'Halloran wrote:
>
> On Fri, Apr 23, 2021 at 9:09 AM Daniel Axtens wrote:
> >
> > Hi Nick,
> >
> > > While looking at -Wundef warnings, the #if CONFIG_EEH stood out as a
> > > possible candidate to convert to #ifdef CONFIG_EEH, but it seems that
> > > based
Nick Desaulniers writes:
> On Thu, Apr 22, 2021 at 6:13 PM Oliver O'Halloran wrote:
>>
>> On Fri, Apr 23, 2021 at 9:09 AM Daniel Axtens wrote:
>> >
>> > Hi Nick,
>> >
>> > > While looking at -Wundef warnings, the #if CONFIG_EEH stood out as a
>> > > possible candidate to convert to #ifdef CONFIG
> On 17. May 2021, at 11:43, Christian Zigotzky wrote:
>
> On 17 May 2021 at 09:42am, Nicholas Piggin wrote:
>> Excerpts from Christian Zigotzky's message of May 15, 2021 11:46 pm:
>>> On 15 May 2021 at 12:08pm Christophe Leroy wrote:
> Le 15/05/2021 à 11:48, Christian Zigotzky a éc
This series implements mitigations for lack of DMA access control on
systems without an IOMMU, which could result in the DMA accessing the
system memory at unexpected times and/or unexpected addresses, possibly
leading to data leakage or corruption.
For example, we plan to use the PCI-e bus for Wi
Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct
initialization to make the code reusable.
Note that we now also call set_memory_decrypted in swiotlb_init_with_tbl.
Signed-off-by: Claire Chang
---
kernel/dma/swiotlb.c | 51 ++--
1 fi
Split the debugfs creation to make the code reusable for supporting
different bounce buffer pools, e.g. restricted DMA pool.
Signed-off-by: Claire Chang
---
kernel/dma/swiotlb.c | 25 +++--
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/kernel/dma/swiotlb.c b/
Add a new kconfig symbol, DMA_RESTRICTED_POOL, for restricted DMA pool.
Signed-off-by: Claire Chang
---
kernel/dma/Kconfig | 14 ++
1 file changed, 14 insertions(+)
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 77b405508743..3e961dc39634 100644
--- a/kernel/dma/Kconfig
Add the initialization function to create restricted DMA pools from
matching reserved-memory nodes.
Signed-off-by: Claire Chang
---
include/linux/device.h | 4 +++
include/linux/swiotlb.h | 3 +-
kernel/dma/swiotlb.c| 76 +
3 files changed, 82 inser
Add a new getter, get_io_tlb_mem, to help select the io_tlb_mem struct.
The restricted DMA pool is preferred if available.
Signed-off-by: Claire Chang
---
include/linux/swiotlb.h | 11 +++
1 file changed, 11 insertions(+)
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
in
Update is_swiotlb_buffer to add a struct device argument. This will be
useful later to allow for restricted DMA pool.
Signed-off-by: Claire Chang
---
drivers/iommu/dma-iommu.c | 12 ++--
drivers/xen/swiotlb-xen.c | 2 +-
include/linux/swiotlb.h | 6 +++---
kernel/dma/direct.c |
Update is_swiotlb_active to add a struct device argument. This will be
useful later to allow for restricted DMA pool.
Signed-off-by: Claire Chang
---
drivers/gpu/drm/i915/gem/i915_gem_internal.c | 2 +-
drivers/gpu/drm/nouveau/nouveau_ttm.c| 2 +-
drivers/pci/xen-pcifront.c
Regardless of swiotlb setting, the restricted DMA pool is preferred if
available.
The restricted DMA pools provide a basic level of protection against the
DMA overwriting buffer contents at unexpected times. However, to protect
against general data leakage and system memory corruption, the system
Move the maintenance of alloc_size to find_slots for better code
reusability later.
Signed-off-by: Claire Chang
---
kernel/dma/swiotlb.c | 10 +-
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 95f482c4408c..2ec6711071de 100
Add a new function, release_slots, to make the code reusable for supporting
different bounce buffer pools, e.g. restricted DMA pool.
Signed-off-by: Claire Chang
---
kernel/dma/swiotlb.c | 35 ---
1 file changed, 20 insertions(+), 15 deletions(-)
diff --git a/kern
Add a new wrapper __dma_direct_free_pages() that will be useful later
for swiotlb_free().
Signed-off-by: Claire Chang
---
kernel/dma/direct.c | 14 ++
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 078f7087e466..eb409832
Add the functions, swiotlb_{alloc,free} to support the memory allocation
from restricted DMA pool.
Signed-off-by: Claire Chang
---
include/linux/swiotlb.h | 4
kernel/dma/swiotlb.c| 35 +--
2 files changed, 37 insertions(+), 2 deletions(-)
diff --git a/
The restricted DMA pool is preferred if available.
The restricted DMA pools provide a basic level of protection against the
DMA overwriting buffer contents at unexpected times. However, to protect
against general data leakage and system memory corruption, the system
needs to provide a way to lock
Introduce the new compatible string, restricted-dma-pool, for restricted
DMA. One can specify the address and length of the restricted DMA memory
region by restricted-dma-pool in the reserved-memory node.
Signed-off-by: Claire Chang
---
.../reserved-memory/reserved-memory.txt | 27
If a device is not behind an IOMMU, we look up the device node and set
up the restricted DMA when the restricted-dma-pool is presented.
Signed-off-by: Claire Chang
---
drivers/of/address.c| 25 +
drivers/of/device.c | 3 +++
drivers/of/of_private.h | 5 +
3
I didn't move this to a separate file because I feel it might be
confusing for swiotlb_alloc/free (and need more functions to be
non-static).
Maybe instead of moving to a separate file, we can try to come up with
a better naming?
Still keep this function because directly using dev->dma_io_tlb_mem
will cause issues for memory allocation for existing devices. The pool
can't support atomic coherent allocation so we need to distinguish the
per device pool and the default pool in swiotlb_alloc.
When call ps3_start_probe_thread() failed, further initialization should
be stopped and the returned error code should be propagated.
Reported-by: Hulk Robot
Signed-off-by: Zhen Lei
---
arch/powerpc/platforms/ps3/device-init.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/p
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