v14: https://lore.kernel.org/patchwork/cover/1448954/
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
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
---
drivers/of/address.c| 33 +
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
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
---
Add the initialization function to create restricted DMA pools from
matching reserved-memory nodes.
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
Add the functions, swiotlb_{alloc,free} and is_swiotlb_for_alloc to
support the memory allocation from restricted DMA pool.
The restricted DMA pool is preferred if available.
Note that since coherent allocation needs remapping, one must set up
another device coherent pool by shared-dma-pool and
Add a new function, swiotlb_release_slots, to make the code reusable for
supporting different bounce buffer pools.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
---
kernel/dma/swiotlb.c | 35 ---
Rename find_slots to swiotlb_find_slots and move the maintenance of
alloc_size to it for better code reusability later.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
---
kernel/dma/swiotlb.c | 16
1 file
Propagate the swiotlb_force into io_tlb_default_mem->force_bounce and
use it to determine whether to bounce the data or not. This will be
useful later to allow for different pools.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
Update is_swiotlb_active to add a struct device argument. This will be
useful later to allow for different pools.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
Acked-by: Stefano Stabellini
---
Update is_swiotlb_buffer to add a struct device argument. This will be
useful later to allow for different pools.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
Acked-by: Stefano Stabellini
---
drivers/iommu/dma-iommu.c | 12
Always have the pointer to the swiotlb pool used in struct device. This
could help simplify the code for other pools.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
Acked-by: Stefano Stabellini
---
drivers/base/core.c| 4
Split the debugfs creation to make the code reusable for supporting
different bounce buffer pools.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
---
kernel/dma/swiotlb.c | 21 ++---
1 file changed, 14
Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct
initialization to make the code reusable.
Signed-off-by: Claire Chang
Reviewed-by: Christoph Hellwig
Tested-by: Stefano Stabellini
Tested-by: Will Deacon
---
kernel/dma/swiotlb.c | 50
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
Excerpts from Haren Myneni's message of June 18, 2021 12:09 pm:
> On Fri, 2021-06-18 at 09:34 +1000, Nicholas Piggin wrote:
>> Excerpts from Haren Myneni's message of June 18, 2021 6:37 am:
>> > NX generates an interrupt when sees a fault on the user space
>> > buffer and the hypervisor forwards
Excerpts from Haren Myneni's message of June 18, 2021 5:49 pm:
> On Fri, 2021-06-18 at 09:22 +1000, Nicholas Piggin wrote:
>> Excerpts from Haren Myneni's message of June 18, 2021 6:36 am:
>> > This patch adds VAS window allocatioa/close with the corresponding
>> > hcalls. Also changes to
Excerpts from Paul Mackerras's message of June 18, 2021 1:49 pm:
> From: Joel Stanley
>
> This allows microwatt's kernel to be built with an embedded device tree.
>
> Load to arch/powerpc/boot/dtbImage.microwatt to 0x50:
>
> mw_debug -b fpga stop load arch/powerpc/boot/dtbImage.microwatt
Excerpts from Paul Mackerras's message of June 18, 2021 1:49 pm:
> From: Benjamin Herrenschmidt
>
> This fixes the core devtree.c functions and the ns16550 UART backend.
Looks okay. Can sparse be run on arch/powerpc/boot? Would be nice to
get that working and endian annotations at some point.
Excerpts from Paul Mackerras's message of June 18, 2021 1:47 pm:
> Microwatt's hardware RNG is accessed using the DARN instruction.
>
I think we're getting a platforms/book3s soon with the VAS patches,
might be a place to add the get_random_darn function.
Huh, DARN is unprivileged right? And
Excerpts from Paul Mackerras's message of June 18, 2021 1:43 pm:
> Microwatt is a FPGA-based implementation of the Power ISA. It
> currently only implements little-endian 64-bit mode, and does
> not (yet) support SMP, VMX, VSX or transactional memory. It has an
> optional FPU, and an optional
Excerpts from Paul Mackerras's message of June 18, 2021 10:12 pm:
> On Fri, Jun 18, 2021 at 05:40:40PM +1000, Nicholas Piggin wrote:
>> Excerpts from Paul Mackerras's message of June 18, 2021 1:46 pm:
>> > From: Benjamin Herrenschmidt
>> >
>> > This adds support to the Microwatt platform to use
Excerpts from Stephen Rothwell's message of June 18, 2021 7:44 pm:
> Hi all,
>
> Today's linux-next merge of the akpm-current tree got a conflict in:
>
> arch/powerpc/kernel/smp.c
>
> between commit:
>
> 86f46f343272 ("powerpc/32s: Initialise KUAP and KUEP in C")
>
> from the powerpc tree
On Thu, Jun 17, 2021 at 04:08:15PM +1000, Michael Ellerman wrote:
> Kees Cook writes:
> > Fix typo in memcpy() where size should be CTR_RFC3686_NONCE_SIZE.
> >
> > Fixes: 030f4e968741 ("crypto: nx - Fix reentrancy bugs")
> > Cc: sta...@vger.kernel.org
> > Signed-off-by: Kees Cook
>
> Thanks.
>
https://bugzilla.kernel.org/show_bug.cgi?id=213079
--- Comment #11 from Erhard F. (erhar...@mailbox.org) ---
Created attachment 297473
--> https://bugzilla.kernel.org/attachment.cgi?id=297473=edit
dmesg (5.13-rc6 + DEBUG_VM_PGTABLE, PowerMac G5 11,2)
The trace got some additional data with
https://bugzilla.kernel.org/show_bug.cgi?id=213069
Erhard F. (erhar...@mailbox.org) changed:
What|Removed |Added
Status|REOPENED|RESOLVED
Hello Alexey, thanks for this feedback!
On Mon, 2021-05-10 at 17:34 +1000, Alexey Kardashevskiy wrote:
>
>
> This does not apply anymore as it conflicts with my 4be518d838809e2135.
ok, rebasing on top of torvalds/master
>
>
> > ---
> > arch/powerpc/platforms/pseries/iommu.c | 100
On Wed, Jun 16, 2021 at 1:51 AM Ondrej Mosnacek wrote:
>
> 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
"Pratik R. Sampat" writes:
> Adds a generic interface to represent the energy and frequency related
> PAPR attributes on the system using the new H_CALL
> "H_GET_ENERGY_SCALE_INFO".
>
> H_GET_EM_PARMS H_CALL was previously responsible for exporting this
> information in the lparcfg, however the
- On Jun 18, 2021, at 3:58 PM, Andy Lutomirski l...@kernel.org wrote:
> On Fri, Jun 18, 2021, at 9:31 AM, Mathieu Desnoyers wrote:
>> - On Jun 17, 2021, at 8:12 PM, Andy Lutomirski l...@kernel.org wrote:
>>
>> > On 6/17/21 7:47 AM, Mathieu Desnoyers wrote:
>> >
>> >> Please change back
On Fri, Jun 18, 2021, at 9:31 AM, Mathieu Desnoyers wrote:
> - On Jun 17, 2021, at 8:12 PM, Andy Lutomirski l...@kernel.org wrote:
>
> > On 6/17/21 7:47 AM, Mathieu Desnoyers wrote:
> >
> >> Please change back this #ifndef / #else / #endif within function for
> >>
> >> if
On Fri, Jun 18, 2021 at 11:37:28AM +0800, Herbert Xu wrote:
> On Thu, Jun 17, 2021 at 08:01:57PM -0700, Ira Weiny wrote:
> >
> > > + flush_kernel_dcache_page(__page); \
> >
> > Is this required on 32bit systems? Why is kunmap_flush_on_unmap() not
> > sufficient on 64bit
- On Jun 18, 2021, at 1:13 PM, Christophe Leroy christophe.le...@csgroup.eu
wrote:
[...]
>
> I don't understand all that complexity to just replace a simple
> 'smp_mb__after_unlock_lock()'.
>
> #define smp_mb__after_unlock_lock() smp_mb()
> #define smp_mb() barrier()
> # define
Le 29/01/2018 à 21:20, Mathieu Desnoyers a écrit :
Allow PowerPC to skip the full memory barrier in switch_mm(), and
only issue the barrier when scheduling into a task belonging to a
process that has registered to use expedited private.
Threads targeting the same VM but which belong to
- On Jun 17, 2021, at 8:12 PM, Andy Lutomirski l...@kernel.org wrote:
> On 6/17/21 7:47 AM, Mathieu Desnoyers wrote:
>
>> Please change back this #ifndef / #else / #endif within function for
>>
>> if (!IS_ENABLED(CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE)) {
>> ...
>> } else {
>> ...
>> }
>>
Le 16/06/2021 à 20:52, Andy Lutomirski a écrit :
On 6/15/21 9:45 PM, Nicholas Piggin wrote:
Excerpts from Andy Lutomirski's message of June 16, 2021 1:21 pm:
The old sync_core_before_usermode() comments suggested that a non-icache-syncing
return-to-usermode instruction is x86-specific and
On Fri, Jun 18, 2021 at 09:09:17AM -0500, Tom Lendacky wrote:
> > swiotlb_init_with_tbl uses memblock_alloc to allocate the io_tlb_mem
> > and memblock_alloc[1] will do memset in memblock_alloc_try_nid[2], so
> > swiotlb_init_with_tbl is also good.
> > I'm happy to add the memset in
On 6/18/21 1:25 AM, Claire Chang wrote:
> On Fri, Jun 18, 2021 at 7:30 AM Stefano Stabellini
> wrote:
>>
>> On Thu, 17 Jun 2021, Claire Chang wrote:
>>> Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct
>>> initialization to make the code reusable.
>>>
>>> Signed-off-by:
On Fri, Jun 18, 2021 at 05:40:40PM +1000, Nicholas Piggin wrote:
> Excerpts from Paul Mackerras's message of June 18, 2021 1:46 pm:
> > From: Benjamin Herrenschmidt
> >
> > This adds support to the Microwatt platform to use the standard
> > 16550-style UART which available in the standalone
Hi all,
Today's linux-next merge of the akpm-current tree got a conflict in:
arch/powerpc/kernel/smp.c
between commit:
86f46f343272 ("powerpc/32s: Initialise KUAP and KUEP in C")
from the powerpc tree and commit:
103e676c91d0 ("lazy tlb: introduce lazy mm refcount helper functions")
On Wed, Jun 16, 2021 at 07:12:40PM +0530, Pratik R. Sampat wrote:
> Adds a generic interface to represent the energy and frequency related
> PAPR attributes on the system using the new H_CALL
> "H_GET_ENERGY_SCALE_INFO".
>
> H_GET_EM_PARMS H_CALL was previously responsible for exporting this
>
Daniel Axtens writes:
>> +#ifdef CONFIG_PPC64
>> +static inline bool kfence_protect_page(unsigned long addr, bool protect)
>> +{
>> +struct page *page;
>> +
>> +page = virt_to_page(addr);
>> +if (protect)
>> +__kernel_map_pages(page, 1, 0);
>> +else
>> +
> +#ifdef CONFIG_PPC64
> +static inline bool kfence_protect_page(unsigned long addr, bool protect)
> +{
> + struct page *page;
> +
> + page = virt_to_page(addr);
> + if (protect)
> + __kernel_map_pages(page, 1, 0);
> + else
> + __kernel_map_pages(page, 1,
On Fri, 2021-06-18 at 09:22 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of June 18, 2021 6:36 am:
> > This patch adds VAS window allocatioa/close with the corresponding
> > hcalls. Also changes to integrate with the existing user space VAS
> > API and provide
Hi Jordan and Christophe,
> --- a/arch/powerpc/mm/book3s64/hash_utils.c
> +++ b/arch/powerpc/mm/book3s64/hash_utils.c
> @@ -126,11 +126,8 @@ EXPORT_SYMBOL_GPL(mmu_slb_size);
> #ifdef CONFIG_PPC_64K_PAGES
> int mmu_ci_restrictions;
> #endif
> -#ifdef CONFIG_DEBUG_PAGEALLOC
> static u8
Excerpts from Paul Mackerras's message of June 18, 2021 1:46 pm:
> From: Benjamin Herrenschmidt
>
> This adds support to the Microwatt platform to use the standard
> 16550-style UART which available in the standalone Microwatt FPGA.
>
> Signed-off-by: Benjamin Herrenschmidt
> Signed-off-by:
Jordan Niethe writes:
> There is support for DEBUG_PAGEALLOC on hash but not on radix.
> Add support on radix.
Somewhat off-topic but I wonder at what point we can drop the weird !PPC
condition in mm/Kconfig.debug:
config DEBUG_PAGEALLOC
bool "Debug page memory allocations"
On Fri, Jun 18, 2021 at 4:05 PM Wesley Sheng wrote:
>
> Reset_link() callback function was called before mmio_enabled() in
> pcie_do_recovery() function actually, so rearrange the general
> sequence betwen step 2 and step 3 accordingly.
I don't think this is true in all cases. If
On Fri, Jun 18, 2021 at 7:30 AM Stefano Stabellini
wrote:
>
> On Thu, 17 Jun 2021, Claire Chang wrote:
> > Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct
> > initialization to make the code reusable.
> >
> > Signed-off-by: Claire Chang
> > Reviewed-by: Christoph Hellwig
Reset_link() callback function was called before mmio_enabled() in
pcie_do_recovery() function actually, so rearrange the general
sequence betwen step 2 and step 3 accordingly.
Signed-off-by: Wesley Sheng
---
Documentation/PCI/pci-error-recovery.rst | 23 ---
1 file changed,
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