On Thu, Mar 12, 2020 at 06:57:39PM +0530, Santosh Sivaraj wrote:
> From: Peter Zijlstra
>
> commit 0ed1325967ab5f7a4549a2641c6ebe115f76e228 upstream.
>
> Architectures for which we have hardware walkers of Linux page table
> should flush TLB on mmu gather batch allocation failures and batch flus
This patchset adds support for the new hcall H_RPT_INVALIDATE
and replaces the nested tlb flush calls with this new hcall
if support for the same exists.
Changes in v3:
-
- Reused the tlb flush routines from radix_tlb.c
- Ensured fixups are take care of due to the above change.
v2:
Implement H_RPT_INVALIDATE hcall and add KVM capability
KVM_CAP_PPC_RPT_INVALIDATE to indicate the support for the same.
This hcall does two types of TLB invalidations:
1. Process-scoped invalidations for guests with LPCR[GTSE]=0.
This is currently not used in KVM as GTSE is not usually
dis
In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.
Signed-off-by: Bharata B Rao
Reviewed-by: Fabiano Rosas
---
arch/powerpc/kvm/bo
Andrew Lunn writes:
> On Tue, Jan 05, 2021 at 01:22:29PM +1100, Michael Ellerman wrote:
>> Since commit 1d6cd3929360 ("modpost: turn missing MODULE_LICENSE()
>> into error") the ppc32_allmodconfig build fails with:
>>
>> ERROR: modpost: missing MODULE_LICENSE() in
>> drivers/net/ethernet/frees
Since commit 1d6cd3929360 ("modpost: turn missing MODULE_LICENSE()
into error") the ppc32_allmodconfig build fails with:
ERROR: modpost: missing MODULE_LICENSE() in
drivers/net/ethernet/freescale/fs_enet/mii-fec.o
ERROR: modpost: missing MODULE_LICENSE() in
drivers/net/ethernet/freescale/fs_
Hi Andy,
Sorry for the slow reply, I was socially distanced from my keyboard.
On Mon, Dec 28, 2020 at 04:36:11PM -0800, Andy Lutomirski wrote:
> On Mon, Dec 28, 2020 at 4:11 PM Nicholas Piggin wrote:
> > > +static inline void membarrier_sync_core_before_usermode(void)
> > > +{
> > > + /*
> >
On Thu, 2020-12-10 at 02:25 +0100, Andrew Lunn wrote:
> On Sat, Dec 05, 2020 at 08:17:24PM +0100, Rasmus Villemoes wrote:
> > All the buffers and registers are already set up appropriately for an
> > MTU slightly above 1500, so we just need to expose this to the
> > networking stack. AFAICT, there'
On Tue, Jan 05, 2021 at 02:17:42PM +, Joakim Tjernlund wrote:
> On Thu, 2020-12-10 at 02:25 +0100, Andrew Lunn wrote:
> > On Sat, Dec 05, 2020 at 08:17:24PM +0100, Rasmus Villemoes wrote:
> > > All the buffers and registers are already set up appropriately for an
> > > MTU slightly above 1500,
On Tue, 2021-01-05 at 15:33 +0100, Andrew Lunn wrote:
> On Tue, Jan 05, 2021 at 02:17:42PM +, Joakim Tjernlund wrote:
> > On Thu, 2020-12-10 at 02:25 +0100, Andrew Lunn wrote:
> > > On Sat, Dec 05, 2020 at 08:17:24PM +0100, Rasmus Villemoes wrote:
> > > > All the buffers and registers are alrea
> Hi Andrew
>
> I found here:
> https://patchwork.kernel.org/project/netdevbpf/patch/20201218105538.30563-2-rasmus.villem...@prevas.dk/
>
> Seem to be underway but stable isn't included, I think it should be.
Stable should happen, since this was posted with [net,v2,3/3]. David
or Jakub handles
On Tue, Jan 05, 2021 at 08:15:15PM +1100, Michael Ellerman wrote:
> Since commit 1d6cd3929360 ("modpost: turn missing MODULE_LICENSE()
> into error") the ppc32_allmodconfig build fails with:
>
> ERROR: modpost: missing MODULE_LICENSE() in
> drivers/net/ethernet/freescale/fs_enet/mii-fec.o
> E
> On Jan 5, 2021, at 5:26 AM, Will Deacon wrote:
>
> Hi Andy,
>
> Sorry for the slow reply, I was socially distanced from my keyboard.
>
>> On Mon, Dec 28, 2020 at 04:36:11PM -0800, Andy Lutomirski wrote:
>> On Mon, Dec 28, 2020 at 4:11 PM Nicholas Piggin wrote:
+static inline void me
On Tue, Jan 05, 2021 at 08:20:51AM -0800, Andy Lutomirski wrote:
> > Interestingly, the architecture recently added a control bit to remove
> > this synchronisation from exception return, so if we set that then we'd
> > have a problem with SYNC_CORE and adding an ISB would be necessary
On 25/12/20 12:24 am, Zheng Yongjun wrote:
mutex lock can be initialized automatically with DEFINE_MUTEX()
rather than explicitly calling mutex_init().
Signed-off-by: Zheng Yongjun
Acked-by: Andrew Donnellan
--
Andrew Donnellan OzLabs, ADL Canberra
a...@linux.ibm.com
.config:
https://cailca.coding.net/public/linux/mm/git/files/master/powerpc.config
Today's linux-next starts to generate random process hang quite easily.
Yesterday's build seems work fine. Sometimes, the process stack seems corrupt
while the process is running 100% CPU with gdb shows it just ent
On Tue, Jan 05, 2021 at 08:20:51AM -0800, Andy Lutomirski wrote:
> > On Jan 5, 2021, at 5:26 AM, Will Deacon wrote:
> > Sorry for the slow reply, I was socially distanced from my keyboard.
> >
> >> On Mon, Dec 28, 2020 at 04:36:11PM -0800, Andy Lutomirski wrote:
> >> On Mon, Dec 28, 2020 at 4:11
From: Michael Ellerman
Date: Tue, 5 Jan 2021 20:15:15 +1100
> Since commit 1d6cd3929360 ("modpost: turn missing MODULE_LICENSE()
> into error") the ppc32_allmodconfig build fails with:
>
> ERROR: modpost: missing MODULE_LICENSE() in
> drivers/net/ethernet/freescale/fs_enet/mii-fec.o
> ERRO
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
Added a new struct, io_tlb_mem, as the IO TLB memory pool descriptor and
moved relevant global variables into that struct.
This will be useful later to allow for restricted DMA pool.
Signed-off-by: Claire Chang
---
arch/powerpc/platforms/pseries/svm.c | 4 +-
drivers/xen/swiotlb-xen.c
Add the initialization function to create restricted DMA pools from
matching reserved-memory nodes in the device tree.
Signed-off-by: Claire Chang
---
include/linux/device.h | 4 ++
include/linux/swiotlb.h | 7 +-
kernel/dma/Kconfig | 1 +
kernel/dma/swiotlb.c| 144 ++
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
Add the functions, swiotlb_alloc and swiotlb_free to support the
memory allocation from restricted DMA pool.
Signed-off-by: Claire Chang
---
include/linux/swiotlb.h | 6 ++
kernel/dma/direct.c | 12 +++
kernel/dma/swiotlb.c| 171 +---
3 files change
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 device tree.
Signed-off-by: Claire Chang
---
.../reserved-memory/reserved-memory.txt | 24 +
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| 21 +
drivers/of/device.c | 4
drivers/of/of_private.h | 5 +
3 fil
Tyrel,
> Drain the command queue and place all commands on a completion list.
> Perform command completion on that list outside the host/queue locks.
> Further, move purged command compeletions outside the host_lock as well.
Please resubmit entire series instead of amending individual patches.
On Wed, Jan 06, 2021 at 11:41:20AM +0800, Claire Chang wrote:
> Add the initialization function to create restricted DMA pools from
> matching reserved-memory nodes in the device tree.
>
> Signed-off-by: Claire Chang
> ---
> include/linux/device.h | 4 ++
> include/linux/swiotlb.h | 7 +-
>
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