Hi,
I am analyzing network performance with intel-iommu enabled.
And found that running with iommu=pt, for every dma map/unmap it
executes this code:
/*
* At boot time, we don't yet know if devices will be 64-bit
capable.
* Assume that they will — if they turn out not to be,
On 02/28/2018 08:57 AM, Daniel Borkmann wrote:
Hi Tushar,
On 02/28/2018 01:33 AM, Tushar Dave wrote:
Using bpf_probe_read_str() from samples/bpf causes compiler warning.
e.g.
warning: implicit declaration of function 'bpf_probe_read_str' is invalid in C99
[-Wimplici
nerated.
Add bpf_probe_read_str() to bpf_helpers.h so it can be used by
samples/bpf programs.
Signed-off-by: Tushar Dave
---
tools/testing/selftests/bpf/bpf_helpers.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/bpf/bpf_helpers.h
b/tools/testing/selftests/bpf/
On 12/04/2017 05:03 PM, Fengguang Wu wrote:
Hi Tushar,
On Tue, Nov 28, 2017 at 01:01:23AM +0530, Tushar Dave wrote:
On 11/23/2017 04:43 AM, Fengguang Wu wrote:
On Wed, Nov 22, 2017 at 03:40:52AM +0530, Tushar Dave wrote:
On 11/21/2017 06:11 PM, Fengguang Wu wrote:
Hello,
FYI this
On 11/23/2017 04:43 AM, Fengguang Wu wrote:
On Wed, Nov 22, 2017 at 03:40:52AM +0530, Tushar Dave wrote:
On 11/21/2017 06:11 PM, Fengguang Wu wrote:
Hello,
FYI this happens in mainline kernel 4.14.0-01330-g3c07399.
It happens since 4.13 .
It occurs in 3 out of 162 boots.
[ 44.637743
On 11/21/2017 06:11 PM, Fengguang Wu wrote:
Hello,
FYI this happens in mainline kernel 4.14.0-01330-g3c07399.
It happens since 4.13 .
It occurs in 3 out of 162 boots.
[ 44.637743] advantechwdt: Unexpected close, not stopping watchdog!
[ 44.997548] input: ImExPS/2 Generic Explorer Mouse
On 11/02/2017 11:58 PM, Sandipan Das wrote:
For added security, the layout of some structures can be
randomized by enabling CONFIG_GCC_PLUGIN_RANDSTRUCT. One
such structure is task_struct. To build BPF programs, we
use Clang which does not support this feature. So, if we
attempt to read a field
On 07/11/2017 09:02 PM, David Miller wrote:
From: Tushar Dave
Date: Tue, 11 Jul 2017 20:43:39 -0700
Yes, indeed the bug is in Linus's tree. However, 'sparc' tree doesn't
have DMA API change (e.g. commit b02c2b0bfd7ae) yet that introduced
the panic.
You can simply make
On 07/11/2017 05:34 PM, David Miller wrote:
From: Tushar Dave
Date: Tue, 11 Jul 2017 15:38:21 -0700
On 07/11/2017 02:48 PM, Meelis Roos wrote:
I tested yesterdayd 4.12+git on sparc64 to see if the sparc merge
works
fine, and on all of my sun4v machines (T1000, T2000, T5120) it crashed
on
On 07/11/2017 02:48 PM, Meelis Roos wrote:
I tested yesterdayd 4.12+git on sparc64 to see if the sparc merge
works
fine, and on all of my sun4v machines (T1000, T2000, T5120) it crashed
on boot with DMA-related stacktrace (below). Allt he machines are
sun4v
physical machines, not VM-s. Older su
On 07/10/2017 10:05 PM, Meelis Roos wrote:
I tested yesterdayd 4.12+git on sparc64 to see if the sparc merge works
fine, and on all of my sun4v machines (T1000, T2000, T5120) it crashed
on boot with DMA-related stacktrace (below). Allt he machines are sun4v
physical machines, not VM-s. Older su
. This results into panic.
Fix it.
Reported-by: Meelis Roos
Signed-off-by: Tushar Dave
---
arch/sparc/kernel/pci_sun4v.c | 12 +++-
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c
index 24f21c7..f10e2f7 10064
NEORDER and default to 13
Tushar Dave (5):
sparc64: Add ATU (new IOMMU) support
sparc64: Initialize iommu_map_table and iommu_pool
sparc64: Bind PCIe devices to use IOMMU v2 service
sparc64: Enable sun4v dma ops to use IOMMU v2 APIs
sparc64: Enable 64-bit DMA
arch/sparc/Kconfig
In order to use Hypervisor (HV) IOMMU v2 API for map/demap, each PCIe
device has to be bound to IOTSB using HV API pci_iotsb_bind().
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/kernel/pci_sun4v.c | 43
ff-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 337
arch/sparc/include/asm/iommu_64.h | 26 +++
arch/sparc/kernel/hvapi.c | 1 +
arch/sparc/kernel/pci_sun4v.c
Add Hypervisor IOMMU v2 APIs pci_iotsb_map(), pci_iotsb_demap() and
enable sun4v dma ops to use IOMMU v2 API for all PCIe devices with
64bit DMA mask.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 6 +
arch/sparc
From: Dave Kleikamp
This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.
Signed-off-by: Dave Kleikamp
Signed-off-by: Tushar Dave
---
arch/sparc/Kconfig | 18 ++
1 file changed, 18 insertions
Like legacy IOMMU, use common iommu_map_table and iommu_pool for ATU.
This change initializes iommu_map_table and iommu_pool for ATU.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Reviewed-by: Sowmini Varadhan
---
arch/sparc/include/asm/iommu_64.h | 2 ++
arch/sparc/kernel/pci_sun4v.c
ATU 64bit addressing allows PCIe devices with 64bit DMA capabilities
to use ATU for 64bit DMA.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/Kconfig| 4
arch/sparc/kernel/iommu.c | 8 ++--
2 files changed, 10 insertions(+), 2
ff-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 337
arch/sparc/include/asm/iommu_64.h | 26 +++
arch/sparc/kernel/hvapi.c | 1 +
arch/sparc/kernel/pci_sun4v.c
In order to use Hypervisor (HV) IOMMU v2 API for map/demap, each PCIe
device has to be bound to IOTSB using HV API pci_iotsb_bind().
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/kernel/pci_sun4v.c | 43
From: Dave Kleikamp
This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.
Signed-off-by: Dave Kleikamp
Signed-off-by: Tushar Dave
---
arch/sparc/Kconfig | 18 ++
1 file changed, 18 insertions
Add Hypervisor IOMMU v2 APIs pci_iotsb_map(), pci_iotsb_demap() and
enable sun4v dma ops to use IOMMU v2 API for all PCIe devices with
64bit DMA mask.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 6 +
arch/sparc
Like legacy IOMMU, use common iommu_map_table and iommu_pool for ATU.
This change initializes iommu_map_table and iommu_pool for ATU.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Reviewed-by: Sowmini Varadhan
---
arch/sparc/include/asm/iommu_64.h | 2 ++
arch/sparc/kernel/pci_sun4v.c
ATU 64bit addressing allows PCIe devices with 64bit DMA capabilities
to use ATU for 64bit DMA.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/Kconfig| 4
arch/sparc/kernel/iommu.c | 8 ++--
2 files changed, 10 insertions(+), 2
1->v2:
- Patch #2 addresses comments by Dave M.
-- use page allocator to allocate IOTSB.
-- use true/false with boolean variables.
Dave Kleikamp (1):
sparc64: Add FORCE_MAX_ZONEORDER and default to 13
Tushar Dave (5):
sparc64: Add ATU (new IOMMU) support
sparc64: Initialize iommu_map_t
rgument
is of type ‘__u32 *’
This patch resolves above compiler warnings.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
---
drivers/net/ethernet/sun/sunqe.c | 11 ++-
drivers/net/ethernet/sun/sunqe.h | 4 ++--
2 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers
le pointer type
./include/linux/dma-mapping.h:445: note: expected ‘dma_addr_t *’ but argument
is of type ‘__u32 *’
This patch resolves above compiler warning.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
---
drivers/net/ethernet/sun/sunbmac.c | 5 +++--
drivers/net/ethernet/sun/s
Recently, ATU (iommu) changes are submitted to sparclinux that
enables 64bit DMA on SPARC. However, this change also makes
'incompatible pointer type' compiler warnings inevitable on sunqe
and sunbmac driver.
The two patches in series fix compiler warnings.
Tushar Dave (2):
sunqe: Fi
le pointer type
./include/linux/dma-mapping.h:445: note: expected ‘dma_addr_t *’ but argument
is of type ‘__u32 *’
This patch resolves above compiler warning.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
---
drivers/net/ethernet/sun/sunbmac.c | 5 +++--
drivers/net/ethernet/sun/s
rgument
is of type ‘__u32 *’
This patch resolves above compiler warnings.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
---
drivers/net/ethernet/sun/sunqe.c | 11 ++-
drivers/net/ethernet/sun/sunqe.h | 4 ++--
2 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers
Recently, ATU (iommu) changes are submitted to linux-sparc that
enables 64bit DMA on SPARC. However, this change also makes
'incompatible pointer type' compiler warnings inevitable on sunqe
and sunbmac driver.
The two patches in series fix compiler warnings.
Tushar Dave (2):
ATU 64bit addressing allows PCIe devices with 64bit DMA capabilities
to use ATU for 64bit DMA.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/Kconfig| 4
arch/sparc/kernel/iommu.c | 8 ++--
2 files changed, 10 insertions(+), 2
to 2G space provided by legacy IOMMU.
ATU allows PCIe devices to use 64bit DMA addressing. Devices
which choose to use 32bit DMA mask will continue to work with the
existing legacy IOMMU.
The patch set is tested on sun4v (T1000, T2000, T3, T4, T5, T7, S7)
and sun4u SPARC.
Thanks.
-Tushar
In order to use Hypervisor (HV) IOMMU v2 API for map/demap, each PCIe
device has to be bound to IOTSB using HV API pci_iotsb_bind().
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/kernel/pci_sun4v.c | 43
From: Dave Kleikamp
This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.
Signed-off-by: Dave Kleikamp
Signed-off-by: Tushar Dave
---
arch/sparc/Kconfig | 18 ++
1 file changed, 18 insertions
ff-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 337
arch/sparc/include/asm/iommu_64.h | 26 +++
arch/sparc/kernel/hvapi.c | 1 +
arch/sparc/kernel/pci_sun4v.c
Add Hypervisor IOMMU v2 APIs pci_iotsb_map(), pci_iotsb_demap() and
enable sun4v dma ops to use IOMMU v2 API for all PCIe devices with
64bit DMA mask.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 6 +
arch/sparc
Like legacy IOMMU, use common iommu_map_table and iommu_pool for ATU.
This change initializes iommu_map_table and iommu_pool for ATU.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Reviewed-by: Sowmini Varadhan
---
arch/sparc/include/asm/iommu_64.h | 2 ++
arch/sparc/kernel/pci_sun4v.c
Add Hypervisor IOMMU v2 APIs pci_iotsb_map(), pci_iotsb_demap() and
enable sun4v dma ops to use IOMMU v2 API for all PCIe devices with
64bit DMA mask.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 6 +
arch/sparc
to 2G space provided by legacy IOMMU.
ATU allows PCIe devices to use 64bit DMA addressing. Devices
which choose to use 32bit DMA mask will continue to work with the
existing legacy IOMMU.
The patch set is tested on sun4v (T1000, T2000, T3, T4, T5, T7, S7)
and sun4u SPARC.
Thanks.
-Tushar
ff-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/include/asm/hypervisor.h | 337
arch/sparc/include/asm/iommu_64.h | 26 +++
arch/sparc/kernel/hvapi.c | 1 +
arch/sparc/kernel/pci_sun4v.c
Like legacy IOMMU, use common iommu_map_table and iommu_pool for ATU.
This change initializes iommu_map_table and iommu_pool for ATU.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Reviewed-by: Sowmini Varadhan
---
arch/sparc/include/asm/iommu_64.h | 2 ++
arch/sparc/kernel/pci_sun4v.c
ATU 64bit addressing allows PCIe devices with 64bit DMA capabilities
to use ATU for 64bit DMA.
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/Kconfig| 4
arch/sparc/kernel/iommu.c | 8 ++--
2 files changed, 10 insertions(+), 2
In order to use Hypervisor (HV) IOMMU v2 API for map/demap, each PCIe
device has to be bound to IOTSB using HV API pci_iotsb_bind().
Signed-off-by: Tushar Dave
Reviewed-by: chris hyser
Acked-by: Sowmini Varadhan
---
arch/sparc/kernel/pci_sun4v.c | 43
From: Dave Kleikamp
This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.
Signed-off-by: Dave Kleikamp
Signed-off-by: Tushar Dave
---
arch/sparc/Kconfig | 18 ++
1 file changed, 18 insertions
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