> -Original Message-
> From: tiantao (H)
> Sent: Friday, February 11, 2022 4:15 PM
> To: Song Bao Hua (Barry Song) ; sh...@kernel.org;
> chenxiang (M)
> Cc: iommu@lists.linux-foundation.org; linux-kselft...@vger.kernel.org;
> linux...@openeuler.org
> Subj
> -Original Message-
> From: chenxiang (M)
> Sent: Tuesday, February 8, 2022 8:05 PM
> To: Song Bao Hua (Barry Song) ; h...@lst.de;
> m.szyprow...@samsung.com; robin.mur...@arm.com
> Cc: linux...@openeuler.org; Linuxarm ;
> iommu@lists.linux-foundat
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Tuesday, December 7, 2021 4:01 AM
> To: Jay Chen ; h...@lst.de;
> m.szyprow...@samsung.com;
> linux-ker...@vger.kernel.org; iommu@lists.linux-foundation.org; Song Bao Hua
> (Barry S
On Fri, Oct 8, 2021 at 12:32 AM Jason Gunthorpe wrote:
>
> On Thu, Oct 07, 2021 at 06:43:33PM +1300, Barry Song wrote:
>
> > So do we have a case where devices can directly access the kernel's data
> > structure such as a list/graph/tree with pointers to a kernel virt
On Tue, Oct 5, 2021 at 7:21 AM Jason Gunthorpe wrote:
>
> On Mon, Oct 04, 2021 at 09:40:03AM -0700, Jacob Pan wrote:
> > Hi Barry,
> >
> > On Sat, 2 Oct 2021 01:45:59 +1300, Barry Song <21cn...@gmail.com> wrote:
> >
> > > >
> > > > >
On Wed, Sep 22, 2021 at 5:14 PM Jacob Pan wrote:
>
> Hi Joerg/Jason/Christoph et all,
>
> The current in-kernel supervisor PASID support is based on the SVM/SVA
> machinery in sva-lib. Kernel SVA is achieved by extending a special flag
> to indicate the binding of the device and a page table shoul
On Sat, Oct 2, 2021 at 1:36 AM Jason Gunthorpe wrote:
>
> On Sat, Oct 02, 2021 at 01:24:54AM +1300, Barry Song wrote:
>
> > I assume KVA mode can avoid this iotlb flush as the device is using
> > the page table of the kernel and sharing the whole kernel space. But
> > w
> -Original Message-
> From: fanghao (A)
> Sent: Tuesday, March 30, 2021 7:34 PM
> To: h...@lst.de; m.szyprow...@samsung.com; robin.mur...@arm.com; Song Bao Hua
> (Barry Song)
> Cc: iommu@lists.linux-foundation.org; linux...@openeuler.org;
> linux-kselft...@vger.k
s.org; h...@lst.de;
> m.szyprow...@samsung.com; Song Bao Hua (Barry Song)
> ; iommu@lists.linux-foundation.org;
> linux-ker...@vger.kernel.org
> Subject: Re: [PATCH] dma-mapping: make map_benchmark compile into module
>
> On Wed, Mar 24, 2021 at 10:17:38AM +0800, Tian Tao wrote:
> >
> -Original Message-
> From: tiantao (H)
> Sent: Wednesday, March 24, 2021 3:18 PM
> To: a...@linux-foundation.org; pet...@infradead.org; paul...@kernel.org;
> a...@kernel.org; t...@linutronix.de; rost...@goodmis.org; h...@lst.de;
> m.szyprow...@samsung.com; Song B
> -Original Message-
> From: chenxiang (M)
> Sent: Thursday, March 18, 2021 10:30 PM
> To: h...@lst.de; m.szyprow...@samsung.com; robin.mur...@arm.com; Song Bao Hua
> (Barry Song)
> Cc: iommu@lists.linux-foundation.org; linux...@openeuler.org;
> linux-ksel
> -Original Message-
> From: Jason Gunthorpe [mailto:j...@ziepe.ca]
> Sent: Thursday, February 11, 2021 7:04 AM
> To: Song Bao Hua (Barry Song)
> Cc: David Hildenbrand ; Wangzhou (B)
> ; linux-ker...@vger.kernel.org;
> iommu@lists.linux-foundation.org; linux...@k
> -Original Message-
> From: Jason Gunthorpe [mailto:j...@ziepe.ca]
> Sent: Wednesday, February 10, 2021 2:54 AM
> To: Song Bao Hua (Barry Song)
> Cc: David Hildenbrand ; Wangzhou (B)
> ; linux-ker...@vger.kernel.org;
> iommu@lists.linux-foundation.org; linux...@k
> -Original Message-
> From: Jason Gunthorpe [mailto:j...@ziepe.ca]
> Sent: Tuesday, February 9, 2021 10:30 AM
> To: Song Bao Hua (Barry Song)
> Cc: David Hildenbrand ; Wangzhou (B)
> ; linux-ker...@vger.kernel.org;
> iommu@lists.linux-foundation.org; linux...@k
> -Original Message-
> From: David Hildenbrand [mailto:da...@redhat.com]
> Sent: Monday, February 8, 2021 11:37 PM
> To: Song Bao Hua (Barry Song) ; Matthew Wilcox
>
> Cc: Wangzhou (B) ; linux-ker...@vger.kernel.org;
> iommu@lists.linux-foundation.org; linux...@k
.infradead.org; linux-...@vger.kernel.org; Andrew
> Morton ; Alexander Viro ;
> gre...@linuxfoundation.org; Song Bao Hua (Barry Song)
> ; kevin.t...@intel.com;
> jean-phili...@linaro.org; eric.au...@redhat.com; Liguozhu (Kenneth)
> ; zhangfei@linaro.org; chensihang (A)
>
>
> -Original Message-
> From: owner-linux...@kvack.org [mailto:owner-linux...@kvack.org] On Behalf Of
> David Hildenbrand
> Sent: Monday, February 8, 2021 9:22 PM
> To: Song Bao Hua (Barry Song) ; Matthew Wilcox
>
> Cc: Wangzhou (B) ; linux-ker...@vger.kernel.org
> -Original Message-
> From: David Rientjes [mailto:rient...@google.com]
> Sent: Monday, February 8, 2021 3:18 PM
> To: Song Bao Hua (Barry Song)
> Cc: Matthew Wilcox ; Wangzhou (B)
> ; linux-ker...@vger.kernel.org;
> iommu@lists.linux-foundation.org; linux...@k
> -Original Message-
> From: owner-linux...@kvack.org [mailto:owner-linux...@kvack.org] On Behalf Of
> Matthew Wilcox
> Sent: Monday, February 8, 2021 2:31 PM
> To: Song Bao Hua (Barry Song)
> Cc: Wangzhou (B) ; linux-ker...@vger.kernel.org;
> iommu@lists.linux-
adead.org;
> linux-...@vger.kernel.org; Andrew Morton ;
> Alexander Viro ; gre...@linuxfoundation.org; Song
> Bao Hua (Barry Song) ; j...@ziepe.ca;
> kevin.t...@intel.com; jean-phili...@linaro.org; eric.au...@redhat.com;
> Liguozhu (Kenneth) ; zhangfei@linaro.org;
> chensihang (A)
> S
ap
since the socket buffers come from OS. Simple RX model eg. disk driver,
is also map -> RX -> unmap, but real RX model in a NIC could be more
complicated considering packets can come spontaneously and many drivers
are using pre-mapped buffers pool. This is in the TBD list.
Signed-off-by: Barry
in tools,
otherwise, if users use old version to run on newer kernel, the random
expansion value will cause side effect on newer kernel.
Signed-off-by: Barry Song
---
kernel/dma/map_benchmark.c | 2 +-
tools/testing/selftests/dma/dma_map_benchmark.c | 4 +++-
2 files changed
> -Original Message-
> From: Christoph Hellwig [mailto:h...@lst.de]
> Sent: Friday, February 5, 2021 11:36 PM
> To: Song Bao Hua (Barry Song)
> Cc: Christoph Hellwig ; m.szyprow...@samsung.com;
> robin.mur...@arm.com; iommu@lists.linux-foundation.org;
> linux-k
> -Original Message-
> From: Christoph Hellwig [mailto:h...@lst.de]
> Sent: Friday, February 5, 2021 10:21 PM
> To: Song Bao Hua (Barry Song)
> Cc: m.szyprow...@samsung.com; h...@lst.de; robin.mur...@arm.com;
> iommu@lists.linux-foundation.org; linux-ker...@vger.k
ap
since the socket buffers come from OS. Simple RX model eg. disk driver,
is also map -> RX -> unmap, but real RX model in a NIC could be more
complicated considering packets can come spontaneously and many drivers
are using pre-mapped buffers pool. This is in the TBD list.
Signed-off-by: Ba
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Friday, February 5, 2021 12:51 PM
> To: Song Bao Hua (Barry Song) ;
> m.szyprow...@samsung.com; h...@lst.de; iommu@lists.linux-foundation.org
> Cc: linux-ker...@vger.kernel.org; linu
-> transmission -> unmap. Transmission delay
reduces the contention of IOMMU. Here a delay is added to simulate
the transmission for TX case so that the tested result could be
more accurate.
RX case would be much more tricky. It is not supported yet.
Signed-off-by: Barry Song
---
kern
> -Original Message-
> From: Tian, Kevin [mailto:kevin.t...@intel.com]
> Sent: Tuesday, February 2, 2021 3:52 PM
> To: Jason Gunthorpe
> Cc: Song Bao Hua (Barry Song) ; chensihang (A)
> ; Arnd Bergmann ; Greg
> Kroah-Hartman ; linux-ker...@vger.kernel.org
> -Original Message-
> From: Jason Gunthorpe [mailto:j...@ziepe.ca]
> Sent: Tuesday, February 2, 2021 12:44 PM
> To: Tian, Kevin
> Cc: Song Bao Hua (Barry Song) ; chensihang (A)
> ; Arnd Bergmann ; Greg
> Kroah-Hartman ; linux-ker...@vger.kernel.org;
> iommu@li
> -Original Message-
> From: Tian, Kevin [mailto:kevin.t...@intel.com]
> Sent: Friday, January 29, 2021 11:09 PM
> To: Song Bao Hua (Barry Song) ; Jason Gunthorpe
>
> Cc: chensihang (A) ; Arnd Bergmann
> ; Greg Kroah-Hartman ;
> linux-ker...@vger.kerne
> -Original Message-
> From: Jason Gunthorpe [mailto:j...@ziepe.ca]
> Sent: Wednesday, January 27, 2021 7:20 AM
> To: Song Bao Hua (Barry Song)
> Cc: Wangzhou (B) ; Greg Kroah-Hartman
> ; Arnd Bergmann ; Zhangfei Gao
> ; linux-accelerat...@lists.oz
> -Original Message-
> From: Jason Gunthorpe [mailto:j...@ziepe.ca]
> Sent: Tuesday, January 26, 2021 2:13 PM
> To: Song Bao Hua (Barry Song)
> Cc: Wangzhou (B) ; Greg Kroah-Hartman
> ; Arnd Bergmann ; Zhangfei Gao
> ; linux-accelerat...@lists.ozlabs.org;
> linu
> -Original Message-
> From: owner-linux...@kvack.org [mailto:owner-linux...@kvack.org] On Behalf Of
> Jason Gunthorpe
> Sent: Tuesday, January 26, 2021 12:16 PM
> To: Song Bao Hua (Barry Song)
> Cc: Wangzhou (B) ; Greg Kroah-Hartman
> ; Arnd Bergmann ; Zhangfei Ga
;
> iommu@lists.linux-foundation.org; linux...@kvack.org; Song Bao Hua (Barry
> Song)
> ; Liguozhu (Kenneth) ;
> chensihang (A)
> Subject: Re: [RFC PATCH v2] uacce: Add uacce_ctrl misc device
>
> On Mon, Jan 25, 2021 at 04:34:56PM +0800, Zhou Wang wrote:
>
> > +static
(f8626802)
[ 48.112884] ---[ end trace d4890e21e75419d5 ]---
Signed-off-by: Barry Song
---
kernel/dma/map_benchmark.c | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/kernel/dma/map_benchmark.c b/kernel/dma/map_benchmark.c
index b1496e744c68..1b1b8ff875cb 100644
--- a
(f8626802)
[ 48.112884] ---[ end trace d4890e21e75419d5 ]---
Signed-off-by: Barry Song
---
kernel/dma/map_benchmark.c | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/kernel/dma/map_benchmark.c b/kernel/dma/map_benchmark.c
index b1496e744c68..1b1b8ff875cb 100644
--- a
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Saturday, December 19, 2020 7:10 AM
> To: Song Bao Hua (Barry Song) ; h...@lst.de;
> m.szyprow...@samsung.com
> Cc: iommu@lists.linux-foundation.org; Linuxarm ; Dan
> Carpenter
>
> -Original Message-
> From: Heiner Kallweit [mailto:hkallwe...@gmail.com]
> Sent: Monday, December 14, 2020 5:33 AM
> To: Christoph Hellwig ; Marek Szyprowski
> ; Robin Murphy ; Song Bao Hua
> (Barry Song)
> Cc: open list:AMD IOMMU (AMD-VI) ; Linux
> Kernel
While dma_mask_bits is larger than 64, the bahvaiour is undefined. On the
other hand, dma_mask_bits which is smaller than 20 (1MB) makes no sense
in real hardware.
Reported-by: Dan Carpenter
Signed-off-by: Barry Song
---
kernel/dma/map_benchmark.c | 6 ++
1 file changed, 6 insertions
> -Original Message-
> From: Dan Carpenter [mailto:dan.carpen...@oracle.com]
> Sent: Wednesday, December 9, 2020 8:00 PM
> To: Song Bao Hua (Barry Song)
> Cc: iommu@lists.linux-foundation.org
> Subject: [bug report] dma-mapping: add benchmark support for str
> -Original Message-
> From: Colin King [mailto:colin.k...@canonical.com]
> Sent: Thursday, November 26, 2020 3:05 AM
> To: Song Bao Hua (Barry Song) ; Christoph
> Hellwig ; Marek Szyprowski ;
> Robin Murphy ; iommu@lists.linux-foundation.org
> Cc: kernel-janit...@v
> -Original Message-
> From: Colin King [mailto:colin.k...@canonical.com]
> Sent: Thursday, November 26, 2020 2:56 AM
> To: Song Bao Hua (Barry Song) ; Christoph
> Hellwig ; Marek Szyprowski ;
> Robin Murphy ; iommu@lists.linux-foundation.org
> Cc: kernel-janit...@v
/sys/bus/pci/devices/:00:01.0/driver_override
echo :00:01.0 > /sys/bus/pci/drivers/xxx/unbind
echo :00:01.0 > /sys/bus/pci/drivers/dma_map_benchmark/bind
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: Barry Song
--
#x27; parameters strictly like the number of threads
- make cache dirty before dma_map
- fix unpaired dma_map_page and dma_unmap_single;
- remove redundant "long long" before ktime_to_ns();
- use devm_add_action()
Barry Song (2):
dma-mapping: add benchmark support for
average map latency(us):1.1 standard deviation:1.9
average unmap latency(us):0.5 standard deviation:0.8
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: Barry Song
---
-v4:
* add dma direction and mask_
> -Original Message-
> From: Christoph Hellwig [mailto:h...@lst.de]
> Sent: Sunday, November 15, 2020 9:45 PM
> To: Song Bao Hua (Barry Song)
> Cc: Christoph Hellwig ; iommu@lists.linux-foundation.org;
> robin.mur...@arm.com; m.szyprow...@samsung.com; Linuxar
> -Original Message-
> From: Christoph Hellwig [mailto:h...@lst.de]
> Sent: Sunday, November 15, 2020 5:54 AM
> To: Song Bao Hua (Barry Song)
> Cc: iommu@lists.linux-foundation.org; h...@lst.de; robin.mur...@arm.com;
> m.szyprow...@samsung.com; Linuxar
> -Original Message-
> From: John Garry
> Sent: Wednesday, November 11, 2020 10:37 PM
> To: Song Bao Hua (Barry Song) ;
> iommu@lists.linux-foundation.org; h...@lst.de; robin.mur...@arm.com;
> m.szyprow...@samsung.com
> Cc: linux-kselft...@vger.kernel.org; Will De
> -Original Message-
> From: John Garry
> Sent: Tuesday, November 10, 2020 9:39 PM
> To: Song Bao Hua (Barry Song) ;
> iommu@lists.linux-foundation.org; h...@lst.de; robin.mur...@arm.com;
> m.szyprow...@samsung.com
> Cc: linux-kselft...@vger.kernel.org; Will De
Hello Robin, Christoph,
Any further comment? John suggested that "depends on DEBUG_FS" should be added
in Kconfig.
I am collecting more comments to send v4 together with fixing this minor issue
:-)
Thanks
Barry
> -Original Message-
> From: Song Bao Hua (Barry Song
> -Original Message-
> From: John Garry
> Sent: Monday, November 2, 2020 10:19 PM
> To: Song Bao Hua (Barry Song) ;
> iommu@lists.linux-foundation.org; h...@lst.de; robin.mur...@arm.com;
> m.szyprow...@samsung.com
> Cc: linux-kselft...@vger.kernel.org; Shuah
/sys/bus/pci/devices/:00:01.0/driver_override
echo :00:01.0 > /sys/bus/pci/drivers/xxx/unbind
echo :00:01.0 > /sys/bus/pci/drivers/dma_map_benchmark/bind
Cc: Joerg Roedel
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: B
case
- check users' parameters strictly like the number of threads
- make cache dirty before dma_map
- fix unpaired dma_map_page and dma_unmap_single;
- remove redundant "long long" before ktime_to_ns();
- use devm_add_action()
Barry Song (2):
dma-mapping: a
average map latency(us):1.1 standard deviation:1.9
average unmap latency(us):0.5 standard deviation:0.8
Cc: Joerg Roedel
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: Barry Song
---
MAINTAINERS | 6
/sys/bus/pci/devices/:00:01.0/driver_override
echo :00:01.0 > /sys/bus/pci/drivers/xxx/unbind
echo :00:01.0 > /sys/bus/pci/drivers/dma_map_benchmark/bind
Cc: Joerg Roedel
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: B
number of threads
- make cache dirty before dma_map
- fix unpaired dma_map_page and dma_unmap_single;
- remove redundant "long long" before ktime_to_ns();
- use devm_add_action();
- wakeup all threads together after they are ready
Barry Song (2):
dma-mapping: add b
average map latency(us):1.1 standard deviation:1.9
average unmap latency(us):0.5 standard deviation:0.8
Cc: Joerg Roedel
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: Barry Song
---
-v2:
* check parameters like threads, second
> -Original Message-
> From: Song Bao Hua (Barry Song) [mailto:song.bao@hisilicon.com]
> Sent: Saturday, October 31, 2020 10:45 PM
> To: Robin Murphy ;
> iommu@lists.linux-foundation.org; h...@lst.de; m.szyprow...@samsung.com
> Cc: j...@8bytes.org; w...@kernel.org
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Saturday, October 31, 2020 4:48 AM
> To: Song Bao Hua (Barry Song) ;
> iommu@lists.linux-foundation.org; h...@lst.de; m.szyprow...@samsung.com
> Cc: j...@8bytes.org; w...@kernel.org
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Friday, October 30, 2020 8:38 AM
> To: Song Bao Hua (Barry Song) ;
> iommu@lists.linux-foundation.org; h...@lst.de; m.szyprow...@samsung.com
> Cc: j...@8bytes.org; w...@kernel.org; sh...@ke
> -Original Message-
> From: h...@lst.de [mailto:h...@lst.de]
> Sent: Tuesday, October 27, 2020 8:55 PM
> To: Song Bao Hua (Barry Song)
> Cc: Robin Murphy ; h...@lst.de;
> iommu@lists.linux-foundation.org; linux-ker...@vger.kernel.org
> Subject: Re: [PATCH] d
"dma_map_benchmark" platform_driver
or pci_driver for benchmarking.
In this patchset, I prefer to use the driver_override and avoid the various
hack in kernel. We can dynamically switch devices behind different IOMMUs
to get the performance of dma map on IOMMU or non-IOMMU.
Barry Song (2):
dma-ma
9 average unmap_nsec:2423
Cc: Joerg Roedel
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: Barry Song
---
MAINTAINERS | 6 ++
tools/testing/selftests/dma/Makefile | 6 ++
tools
l also
be supported afterwards.
Cc: Joerg Roedel
Cc: Will Deacon
Cc: Shuah Khan
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Robin Murphy
Signed-off-by: Barry Song
---
kernel/dma/Kconfig | 8 ++
kernel/dma/Makefile| 1 +
kernel/dma/map_benchmar
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Tuesday, October 27, 2020 1:25 AM
> To: h...@lst.de
> Cc: iommu@lists.linux-foundation.org; linux-ker...@vger.kernel.org; Song Bao
> Hua (Barry Song)
> Subject: [PATCH] dma: Per-NUMA-n
> -Original Message-
> From: linux-kernel-ow...@vger.kernel.org
> [mailto:linux-kernel-ow...@vger.kernel.org] On Behalf Of John Garry
> Sent: Saturday, August 22, 2020 1:54 AM
> To: w...@kernel.org; robin.mur...@arm.com
> Cc: j...@8bytes.org; linux-arm-ker...@lists.infradead.org;
> iommu
> -Original Message-
> From: linux-kernel-ow...@vger.kernel.org
> [mailto:linux-kernel-ow...@vger.kernel.org] On Behalf Of Christoph Hellwig
> Sent: Friday, August 21, 2020 6:19 PM
> To: Song Bao Hua (Barry Song)
> Cc: h...@lst.de; m.szyprow...@samsung.com; robin.m
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Friday, August 28, 2020 11:18 PM
> To: Song Bao Hua (Barry Song) ; Will Deacon
>
> Cc: iommu@lists.linux-foundation.org; linux-arm-ker...@lists.infradead.org;
> j...@8bytes.org; Li
> -Original Message-
> From: Will Deacon [mailto:w...@kernel.org]
> Sent: Friday, August 28, 2020 10:29 PM
> To: Song Bao Hua (Barry Song)
> Cc: iommu@lists.linux-foundation.org; linux-arm-ker...@lists.infradead.org;
> robin.mur...@arm.com; j...@8bytes.org; Linux
> -Original Message-
> From: Jean-Philippe Brucker [mailto:jean-phili...@linaro.org]
> Sent: Friday, August 28, 2020 7:41 PM
> To: Song Bao Hua (Barry Song)
> Cc: iommu@lists.linux-foundation.org; linux-arm-ker...@lists.infradead.org;
> robin.mur...@arm.com; w...@ke
cmdq_issue_cmdlist() is the hotspot that uses a lot of time. This patch
adds tracepoints for it to help debug.
Signed-off-by: Barry Song
---
* can furthermore develop an eBPF program to benchmark using this trace
cmdlistlat.c:
#include
BPF_HASH(start, u32);
BPF_HISTOGRAM(dist
wed-by: Robin Murphy
Signed-off-by: Barry Song
---
-v5: add Robin's reviewed-by
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 7
L flag. on the other hand, we only need to check
a bit in options rather than two bits in features
Barry Song (3):
iommu/arm-smmu-v3: replace symbolic permissions by octal permissions
for module parameter
iommu/arm-smmu-v3: replace module_param_named by module_param for
disable_bypa
Just use module_param() - going out of the way to specify a "different"
name that's identical to the variable name is silly.
Reviewed-by: Robin Murphy
Signed-off-by: Barry Song
---
-v5: add Robin's reviewed-by
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +-
1 file
des a command line option so that users can decide to
use MSI polling or not based on their tests.
Reviewed-by: Robin Murphy
Signed-off-by: Barry Song
---
-v5: add Robin's reviewed-by
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 17 -
1 file changed, 12 insertions(+), 5
: Andrew Morton
Cc: Mike Rapoport
Signed-off-by: Barry Song
---
-v8:
* rename parameter from pernuma_cma to cma_pernuma with respect to the comments
of Mike Rapoport and Randy Dunlap
* if both hugetlb_cma and pernuma_cma are enabled, we may need a larger default
CMA_AREAS. In numa, we set it
: Ganapatrao Kulkarni
Cc: Catalin Marinas
Cc: Nicolas Saenz Julienne
Cc: Steve Capper
Cc: Andrew Morton
Cc: Mike Rapoport
Signed-off-by: Barry Song
---
arch/arm64/mm/init.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 481d22c32a2e
ier.
* move dma_pernuma_cma_reserve() after hugetlb_cma_reserve() to
reuse the comment before hugetlb_cma_reserve() with respect to
Robin's comment
-v2:
* fix some issues reported by kernel test robot
* fallback to default cma while allocation fails in per-numa cma
free memory
Mike Kravetz
Cc: Roman Gushchin
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Will Deacon
Cc: Robin Murphy
Cc: Andrew Morton
Signed-off-by: Barry Song
---
this patch is fixing the magic number issue with respect to Will's comment
here:
https://lore.kernel.org/l
> -Original Message-
> From: Song Bao Hua (Barry Song)
> Sent: Saturday, August 22, 2020 7:27 AM
> To: 'Mike Kravetz' ; h...@lst.de;
> m.szyprow...@samsung.com; robin.mur...@arm.com; w...@kernel.org;
> ganapatrao.kulka...@cavium.com; catalin.mari...@arm.com;
> -Original Message-
> From: Mike Kravetz [mailto:mike.krav...@oracle.com]
> Sent: Saturday, August 22, 2020 5:53 AM
> To: Song Bao Hua (Barry Song) ; h...@lst.de;
> m.szyprow...@samsung.com; robin.mur...@arm.com; w...@kernel.org;
> ganapatrao.kulka...@cavium
> -Original Message-
> From: Randy Dunlap [mailto:rdun...@infradead.org]
> Sent: Saturday, August 22, 2020 4:08 AM
> To: Song Bao Hua (Barry Song) ; h...@lst.de;
> m.szyprow...@samsung.com; robin.mur...@arm.com; w...@kernel.org;
> ganapatrao.kulka...@cavium.com; catal
> -Original Message-
> From: Mike Rapoport [mailto:r...@linux.ibm.com]
> Sent: Saturday, August 22, 2020 2:28 AM
> To: Song Bao Hua (Barry Song)
> Cc: h...@lst.de; m.szyprow...@samsung.com; robin.mur...@arm.com;
> w...@kernel.org; ganapatrao.kulka...@cavium.c
: Ganapatrao Kulkarni
Cc: Catalin Marinas
Cc: Nicolas Saenz Julienne
Cc: Steve Capper
Cc: Andrew Morton
Cc: Mike Rapoport
Signed-off-by: Barry Song
---
-v7: add Will's acked-by
arch/arm64/mm/init.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/mm/init.c b/arch/arm
avetz
Cc: Roman Gushchin
Cc: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Will Deacon
Cc: Robin Murphy
Cc: Andrew Morton
Signed-off-by: Barry Song
---
this patch is fixing the magic number issue with respect to Will's comment
here:
https://lore.kernel.org/l
: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Will Deacon
Cc: Robin Murphy
Cc: Ganapatrao Kulkarni
Cc: Catalin Marinas
Cc: Nicolas Saenz Julienne
Cc: Steve Capper
Cc: Andrew Morton
Cc: Mike Rapoport
Signed-off-by: Barry Song
---
-v7: with respect to Will's comments
* move t
parameter for per-numa could
make life easier.
* move dma_pernuma_cma_reserve() after hugetlb_cma_reserve() to
reuse the comment before hugetlb_cma_reserve() with respect to
Robin's comment
-v2:
* fix some issues reported by kernel test robot
* fallback to default cma while alloc
> -Original Message-
> From: Will Deacon [mailto:w...@kernel.org]
> Sent: Friday, August 21, 2020 9:27 PM
> To: Song Bao Hua (Barry Song)
> Cc: h...@lst.de; m.szyprow...@samsung.com; robin.mur...@arm.com;
> ganapatrao.kulka...@cavium.com; catalin.mari...@arm.com;
&
> -Original Message-
> From: Will Deacon [mailto:w...@kernel.org]
> Sent: Friday, August 21, 2020 8:47 PM
> To: Song Bao Hua (Barry Song)
> Cc: h...@lst.de; m.szyprow...@samsung.com; robin.mur...@arm.com;
> ganapatrao.kulka...@cavium.com; catalin.mari...@arm.com;
&
> -Original Message-
> From: linux-kernel-ow...@vger.kernel.org
> [mailto:linux-kernel-ow...@vger.kernel.org] On Behalf Of Randy Dunlap
> Sent: Friday, August 21, 2020 2:50 PM
> To: Song Bao Hua (Barry Song) ; h...@lst.de;
> m.szyprow...@samsung.com; robin
: Christoph Hellwig
Cc: Marek Szyprowski
Cc: Will Deacon
Cc: Robin Murphy
Cc: Ganapatrao Kulkarni
Cc: Catalin Marinas
Cc: Nicolas Saenz Julienne
Cc: Steve Capper
Cc: Andrew Morton
Cc: Mike Rapoport
Signed-off-by: Barry Song
---
v6: rebase on top of 5.9-rc1;
doc cleanup
.../admin-guide
e() to
reuse the comment before hugetlb_cma_reserve() with respect to
Robin's comment
-v2:
* fix some issues reported by kernel test robot
* fallback to default cma while allocation fails in per-numa cma
free memory properly
Barry Song (2):
dma-contiguous: provide the abil
: Ganapatrao Kulkarni
Cc: Catalin Marinas
Cc: Nicolas Saenz Julienne
Cc: Steve Capper
Cc: Andrew Morton
Cc: Mike Rapoport
Signed-off-by: Barry Song
---
-v6: rebase on top of 5.9-rc1
arch/arm64/mm/init.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm
> -Original Message-
> From: Robin Murphy [mailto:robin.mur...@arm.com]
> Sent: Wednesday, August 19, 2020 2:31 AM
> To: Song Bao Hua (Barry Song) ; w...@kernel.org;
> j...@8bytes.org
> Cc: Zengtao (B) ;
> iommu@lists.linux-foundation.org; linux-arm-ker..
cleanup the existing module parameter of bypass_
* add ARM_SMMU_OPT_MSIPOLL flag with respect to Robin's comments
Signed-off-by: Barry Song
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3
des a command line option so that users can decide to
use MSI polling or not based on their tests.
Signed-off-by: Barry Song
---
-v4: add ARM_SMMU_OPT_MSIPOLL flag with respect to Robin's comment
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 17 -
1 file changed, 12 insert
ed to check
a bit in options rather than two bits in features
Barry Song (3):
iommu/arm-smmu-v3: replace symbolic permissions by octal permissions
for module parameter
iommu/arm-smmu-v3: replace module_param_named by module_param for
disable_bypass
iommu/arm-smmu-v3: permit use
Just use module_param() - going out of the way to specify a "different"
name that's identical to the variable name is silly.
Signed-off-by: Barry Song
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iom
des a command line option so that users can decide to
use MSI polling or not based on their tests.
Signed-off-by: Barry Song
---
-v4: rebase on top of 5.9-rc1
refine changelog
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 18 ++
1 file changed, 14 insertions(+), 4 deletions(-)
> -Original Message-
> From: John Garry
> Sent: Tuesday, August 4, 2020 3:34 AM
> To: Song Bao Hua (Barry Song) ; w...@kernel.org;
> robin.mur...@arm.com; j...@8bytes.org; iommu@lists.linux-foundation.org
> Cc: Zengtao (B) ;
> linux-arm-ker...@lists.infradead.org
>
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