On Tue, 2022-02-08 at 09:48 -0600, Nathan Lynch wrote:
> Haren Myneni writes:
> > The coprocessor capabilities struct is used to get default and
> > QoS capabilities from the hypervisor during init, DLPAR event and
> > migration. So instead of allocating this struct for e
The current partition migration implementation does not freeze the
user space and the user space can continue open VAS windows. So
when migration_in_progress flag is enabled, VAS open window
API returns -EBUSY.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 13
after migration. All active windows
for both default and QoS types will be closed and mark them
in-active and reopened after migration with this handler.
During the migration, the user space receives paste instruction
failure if it issues copy/paste on these in-active windows.
Signed-off-by: Haren
migration is in progress,
set VAS_WIN_NO_CRED_CLOSE to the window status. Close window
happens with the first event (migration or DLPAR) and Reopen
window happens only with the last event (migration or DLPAR).
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 2 +
arch
.
Also disable copy/paste feature flag if any capabilities HCALL
is failed.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 49
1 file changed, 21 insertions(+), 28 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc
_caps struct" to eliminate
memory allocation failure during migration (suggestion by
Nathan Lynch)
Haren Myneni (4):
powerpc/pseries/vas: Define global hv_cop_caps struct
powerpc/pseries/vas: Modify reconfig open/close functions for
migration
powerpc/pseries/vas: Add VAS migrati
On Mon, 2022-01-31 at 10:37 -0600, Nathan Lynch wrote:
> Hi Haren,
>
> Mostly this seems OK to me. Some questions:
Thanks Nathan for your suggestions.
>
> Haren Myneni writes:
> > Since the VAS windows belong to the VAS hardware resource, the
> > hypervisor expects
The current partition migration implementation does not freeze the
user space and the user space can continue open VAS windows. So
when migration_in_progress flag is enabled, VAS open window
API returns -EBUSY.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 13
after migration. All active windows
for both default and QoS types will be closed and mark them
in-active and reopened after migration with this handler.
During the migration, the user space receives paste instruction
failure if it issues copy/paste on these in-active windows.
Signed-off-by: Haren
migration is in progress,
set VAS_WIN_NO_CRED_CLOSE to the window status. Close window
happens with the first event (migration or DLPAR) and Reopen
window happens only with the last event (migration or DLPAR).
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 2 +
arch
to reopen all
windows which has VAS_WIN_MIGRATE_CLOSE status and make them
active again. The user space gets paste instruction failure
when it sends requests on these in-active windows.
These patches depend on VAS/DLPAR support patch series
Haren Myneni (3):
powerpc/pseries/vas: Modify reconfig open
The current partition migration implementation does not freeze the
user space and the user space can continue open VAS windows. So
when migration_in_progress flag is enabled, VAS open window
API returns -EBUSY.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 14
migration. All active windows for
both default and QoS types will be closed during suspend and
reopen them during resume. During migration, the user space
should expect paste instruction failure if issues copy/paste
on these active windows.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries
migration is in progress,
set VAS_WIN_NO_CRED_CLOSE to the window status. Close window
happens with the first event (migration or DLPAR) and Reopen
window happens only with the last event (migration or DLPAR).
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 2 +
arch
VAS_WIN_MIGRATE_CLOSE status.
These patches depend on VAS/DLPAR support patch series
(https://lists.ozlabs.org/pipermail/linuxppc-dev/2021-December/238331.html)
Also the suspend/resume notifier code is added in a separate patch
and will be posted later with the actual patches.
Haren Myneni (3):
powerpc/pseries
to communicate to the kernel.
This patch adds an interface so that drmgr command can write the new
target QoS credits in sysfs. But the kernel gets the new QoS
capabilities from the hypervisor whenever target_creds is updated
to make sure sync with the values in the hypervisor.
Signed-off-by: Haren
be
/* changed with DLPAR operation */
used_creds /* Used credits */
/sys/devices/vas/vas0/gzip/qos_caps (QoS GZIP capabilities)
avail_creds
target_creds
used_creds
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/Makefile| 2 +-
arch/powerpc/platforms
instruction that caused the fault was
a paste.
Signed-off-by: Nicholas Piggin
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/ppc-opcode.h | 2 ++
arch/powerpc/platforms/book3s/vas-api.c | 47 -
2 files changed, 48 insertions(+), 1 deletion(-)
diff --git a/arch
to handle NX request page faults if the user
space issue NX requests.
This handler remap the new paste address with the same VMA when the
window is active again (due to core add with DLPAR). Otherwise
returns paste failure.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/book3s/vas-api.c
is active or open new window when the credit
is available.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/book3s/vas-api.c | 21 -
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/book3s/vas-api.c
b/arch/powerpc/platforms/book3s/vas
. Also
the kernel unmaps the paste address so that the user space receives paste
failure until these windows are active with the later DLPAR (core add).
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 1 +
arch/powerpc/platforms/book3s/vas-api.c | 2 +
arch/powerpc
. Then the user space can continue to use
these windows and send HW compression requests to NX successfully.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 16 +++
arch/powerpc/platforms/book3s/vas-api.c | 1 +
arch/powerpc/platforms/pseries/vas.c| 144
during DLPAR operation.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 7 ---
arch/powerpc/platforms/pseries/vas.h | 1 +
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index
and reopen windows when the
credits available later.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 37
1 file changed, 37 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index c0737379cc7b
target/used/avail_creds provides credits usage to user space via
sysfs and the same interface can be used on PowerNV in future.
Remove "lpar" from these names so that applicable on both PowerVM
and PowerNV.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/
dits.
Changes in v3:
- Rebase 5.16
- Reconfigure VAS windows only for CPU hotplug events.
Haren Myneni (10):
powerpc/pseries/vas: Use common names in VAS capability structure
powerpc/pseries/vas: Add notifier for DLPAR core removal/add
powerpc/pseries/vas: Save partition PID in pseries_vas_wi
On Fri, 2022-01-14 at 11:59 -0600, Nathan Lynch wrote:
> Haren Myneni writes:
>
> > Before migration starts, all secondary CPUs will be offline which
> > can invoke VAS DLPAR event.
>
> I don't understand this statement, so I can't evaluate the patch. The
> curr
space can continue open VAS windows. So
when migration_in_progress flag is enabled, VAS open window
API returns -EBUSY.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 16 ++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms
migration. All active windows for
both default and QoS types will be closed during suspend and
reopen them during resume. During migration, the user space
should expect paste instruction failure if issues copy/paste
on these active windows.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries
the window status to VAS_WIN_MIGRATE_CLOSE when closes and
reopen windows with the same status during resume.
- Continue to close all windows even if deallocate HCALL failed
(should not happen) since no way to stop migration with the
current LPM implementation.
Signed-off-by: Haren Myneni
VAS_WIN_MIGRATE_CLOSE status.
These patches depend on VAS/DLPAR support patch series
(https://lists.ozlabs.org/pipermail/linuxppc-dev/2021-December/238331.html)
Also the suspend/resume notifier code is added in a separate patch
and will be posted later with the actual patches.
Haren Myneni (3):
powerpc/pseries
to communicate to the kernel.
This patch adds an interface so that drmgr command can write the new
target QoS credits in sysfs. But the kernel gets the new QoS
capabilities from the hypervisor whenever target_creds is updated
to make sure sync with the values in the hypervisor.
Signed-off-by: Haren
be
/* changed with DLPAR operation */
used_creds /* Used credits */
/sys/devices/vas/vas0/gzip/qos_caps (QoS GZIP capabilities)
avail_creds
target_creds
used_creds
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/Makefile| 2 +-
arch/powerpc/platforms
instruction that caused the fault was
a paste.
Signed-off-by: Nicholas Piggin
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/ppc-opcode.h | 2 ++
arch/powerpc/platforms/book3s/vas-api.c | 47 -
2 files changed, 48 insertions(+), 1 deletion(-)
diff --git a/arch
to handle NX request page faults if the user
space issue NX requests.
This handler remap the new paste address with the same VMA when the
window is active again (due to core add with DLPAR). Otherwise
returns paste failure.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/book3s/vas-api.c
is active or open new window when the credit
is available.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/book3s/vas-api.c | 21 -
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/book3s/vas-api.c
b/arch/powerpc/platforms/book3s/vas
. Also
the kernel unmaps the paste address so that the user space receives paste
failure until these windows are active with the later DLPAR (core add).
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 1 +
arch/powerpc/platforms/book3s/vas-api.c | 2 +
arch/powerpc
. Then the user space can continue to use
these windows and send HW compression requests to NX successfully.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 15 +++
arch/powerpc/platforms/book3s/vas-api.c | 1 +
arch/powerpc/platforms/pseries/vas.c| 143
dits.
Haren Myneni (10):
powerpc/pseries/vas: Use common names in VAS capability structure
powerpc/pseries/vas: Add notifier for DLPAR core removal/add
powerpc/pseries/vas: Save partition PID in pseries_vas_window struct
powerpc/pseries/vas: Reopen windows with DLPAR core add
powerpc/pseries
On Tue, 2021-11-30 at 10:25 +1100, Michael Ellerman wrote:
> Nicholas Piggin writes:
> > Excerpts from Cédric Le Goater's message of November 26, 2021 5:13
> > pm:
> > > On 11/26/21 06:21, Nicholas Piggin wrote:
> > > > KVM does not support VAS so guests always print a useless error
> > > > on
to communicate to the kernel.
This patch adds an interface so that drmgr command can write the new
target QoS credits in sysfs. But the kernel gets the new QoS
capabilities from the hypervisor whenever target_creds is updated
to make sure sync with the values in the hypervisor.
Signed-off-by: Haren
be
/* changed with DLPAR operation */
used_creds /* Used credits */
/sys/devices/vas/vas0/gzip/qos_caps (QoS GZIP capabilities)
avail_creds
target_creds
used_creds
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/Makefile| 2 +-
arch/powerpc/platforms
instruction that caused the fault was
a paste.
Signed-off-by: Nicholas Piggin
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/ppc-opcode.h | 2 ++
arch/powerpc/platforms/book3s/vas-api.c | 47 -
2 files changed, 48 insertions(+), 1 deletion(-)
diff --git a/arch
to handle NX request page faults if the user
space issue NX requests.
This handler remap the new paste address with the same VMA when the
window is active again (due to core add with DLPAR). Otherwise
returns paste failure.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/book3s/vas-api.c
is active or open new window when the credit
is available.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/book3s/vas-api.c | 21 -
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/book3s/vas-api.c
b/arch/powerpc/platforms/book3s/vas
. Also
the kernel unmaps the paste address so that the user space receives paste
failure until these windows are active with the later DLPAR (core add).
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 1 +
arch/powerpc/platforms/book3s/vas-api.c | 2 +
arch/powerpc
. Then the user space can continue to use
these windows and send HW compression requests to NX successfully.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 15 +++
arch/powerpc/platforms/book3s/vas-api.c | 1 +
arch/powerpc/platforms/pseries/vas.c| 148
during DLPAR operation.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 6 +++---
arch/powerpc/platforms/pseries/vas.h | 1 +
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index
and reopen windows when the
credits available later.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 34
1 file changed, 34 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index ecdd21f517c0
target/used/avail_creds provides credits usage to user space via
sysfs and the same interface can be used on PowerNV in future.
Remove "lpar" from these names so that applicable on both PowerVM
and PowerNV.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/
ines the credit usage with sysfs
target/avail/used_creds interfaces. drmgr uses target_creds
to notify OS for QoS credit changes.
Thanks to Nicholas Piggin and Aneesh Kumar for the valuable suggestions
on the NXGZIP design to support DLPAR operations.
Haren Myneni (10):
pow
On PowerVM, the hypervisor defines the maximum buffer length for
each NX request and the kernel exported this value via sysfs.
This patch reads this value if the sysfs entry is available and
is used to limit the request length.
Signed-off-by: Haren Myneni
---
.../testing/selftests/powerpc/nx
and makes an ioctl
> > to allocate VAS window. The close interface is used to deallocate
> > window.
> >
> > Signed-off-by: Haren Myneni
>
> Reviewed-by: Nicholas Piggin
>
> Unless there is some significant performance reason it might be
> simplest
> to
ult CRB
into this FIFO.
PowerVM: Each window will have an IRQ and the setup will be done during
window open.
Thanks
Haren
>
> Thanks,
> Nick
>
> > Signed-off-by: Haren Myneni
> > ---
> > arch/powerpc/platforms/pseries/vas.c | 102
> > ++
The user space uses /dev/crypto/nx-gzip interface to setup VAS
windows, create paste mapping and close windows. This patch adds
changes to create/remove this interface with VAS register/unregister
functions on PowerVM platform.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
Acked
-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-pseries.c | 43 +++
1 file changed, 43 insertions(+)
diff --git a/drivers/crypto/nx/nx-common-pseries.c
b/drivers/crypto/nx/nx-common-pseries.c
index 9fc2abb56019..f51a50d40504 100644
--- a/drivers
only
for NXGZIP).
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-pseries.c | 87 +++
1 file changed, 87 insertions(+)
diff --git a/drivers/crypto/nx/nx-common-pseries.c
b/drivers/crypto/nx/nx-common-pseries.c
index cc8dd3072b8b
Rename nx-842-pseries.c to nx-common-pseries.c to add code for new
GZIP compression type. The actual functionality is not changed in
this patch.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
Acked-by: Nicholas Piggin
---
drivers/crypto/nx/Makefile | 2
and also handles the fault by updating the CSB.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 102 +++
1 file changed, 102 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index f5a44f2f0e99
) and unregister to remove this entry.
The user space process opens this device node and makes an ioctl
to allocate VAS window. The close interface is used to deallocate
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 4 +
arch/powerpc/platforms/pseries
).
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 122 +++
1 file changed, 122 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index a73d7d00bf55..93794e12527d 100644
--- a/arch/powerpc/platforms
VAS capabilities
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas Piggin
---
arch/powerpc/platforms/pseries/vas.c | 147 +++
1 file changed, 147 insertions(+)
create mode 100644 arch/powerpc/platforms/pseries/vas.c
diff --git a/arch/powerpc/platforms/pseries/vas.c
b
. But the process can pass
VAS_TX_WIN_FLAG_QOS_CREDIT flag with VAS_TX_WIN_OPEN ioctl to open
QoS type window.
Signed-off-by: Haren Myneni
Acked-by: Nicholas Piggin
---
arch/powerpc/include/uapi/asm/vas-api.h | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc
This patch adds hcalls and other definitions. Also define structs
that are used in VAS implementation on PowerVM.
Signed-off-by: Haren Myneni
Acked-by: Nicholas Piggin
---
arch/powerpc/include/asm/hvcall.h| 7 ++
arch/powerpc/include/asm/vas.h | 30 +++
arch/powerpc
(pnv_vas_window on PowerNV). Also adds
the corresponding changes in PowerNV vas code.
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas Piggin
---
arch/powerpc/include/asm/vas.h | 14 +-
arch/powerpc/platforms/powernv/vas-debug.c | 27 ++--
arch/powerpc/platforms/powernv/vas-fault.c
is not changed.
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas Piggin
---
arch/powerpc/include/asm/vas.h | 3 +
arch/powerpc/platforms/book3s/vas-api.c| 167 +
arch/powerpc/platforms/powernv/vas-fault.c | 155 ++-
3 files changed, 179
Take pid and mm references when each window opens and drops during
close. This functionality is needed for powerNV and pseries. So
this patch defines the existing code as functions in common book3s
platform vas-api.c
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas Piggin
---
arch/powerpc
PowerNV uses registers to open/close VAS windows, and getting the
paste address. Whereas the hypervisor calls are used on PowerVM.
This patch adds the platform specific user space window operations
and register with the common VAS user space interface.
Signed-off-by: Haren Myneni
Reviewed
powerNV and pseries drivers register / unregister to the corresponding
platform specific VAS separately. Then these VAS functions call the
common API with the specific window operations. So rename powerNV VAS
API register/unregister functions.
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas
The pseries platform will share vas and nx code and interfaces
with the PowerNV platform, so create the
arch/powerpc/platforms/book3s/ directory and move VAS API code
there. Functionality is not changed.
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas Piggin
---
arch/powerpc/include/asm
kernel.org # 5.8+
Signed-off-by: Haren Myneni
Reported-by: Nicholas Piggin
Reviewed-by: Nicholas Piggin
---
arch/powerpc/platforms/powernv/vas-window.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas-window.c
b/arch/powerpc/platfor
nges based on suggestions from Nicholas Piggin
- Create ref_get_pid_and_task() helper function which
takes task refrence based on pid or tgid
- Pass vas_id and flags to platform specific open window API
- Miscellaneous changes
Haren Myneni (17):
powerpc/powernv/vas: Release referen
handles the interrupt by issuing H_GET_NX_FAULT hcall
> > to retrieve the fault CRB information.
> >
> > This patch also adds changes to setup and free IRQ per each
> > window and also handles the fault by updating the CSB.
> >
> > Signed-off-by: Haren Myneni
and makes an ioctl
> > to allocate VAS window. The close interface is used to deallocate
> > window.
> >
> > Signed-off-by: Haren Myneni
> > ---
> > arch/powerpc/include/asm/vas.h | 4 +
> > arch/powerpc/platforms/pseries/Makefile | 1 +
> &
and makes an ioctl
> > to allocate VAS window. The close interface is used to deallocate
> > window.
> >
> > Signed-off-by: Haren Myneni
> > ---
> > arch/powerpc/include/asm/vas.h | 4 +
> > arch/powerpc/platforms/pseries/Makefile | 1 +
> &
> > This patch adds the platform specific user space window operations
> > and register with the common VAS user space interface.
> >
> > Signed-off-by: Haren Myneni
> > ---
> > arch/powerpc/include/asm/vas.h | 14 +-
> > arch/powerpc/platforms
ended values.
We can add this patch and the last one (crypto/nx: Add sysfs interface
to export NX capabilities) before the actual enablement ("crypto/nx:
Register and unregisterVAS interface on PowerVM""
Thanks
Haren
>
> Thanks,
> Nick
>
> > Signed-off-by: Ha
of bytes processed in one
request */
NX will return RMA_Reject if the request buffer size is greater
than req_max_processed_len.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-pseries.c | 43 +++
1 file changed, 43
features that the hypervisor supports. Then retrieve
the capabilities for the specific feature (available only
for NXGZIP).
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/nx-common-pseries.c | 86 +++
1 file changed, 86 insertions(+)
diff --git
The user space uses /dev/crypto/nx-gzip interface to setup VAS
windows, create paste mapping and close windows. This patch adds
changes to create/remove this interface with VAS register/unregister
functions on PowerVM platform.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers
Rename nx-842-pseries.c to nx-common-pseries.c to add code for new
GZIP compression type. The actual functionality is not changed in
this patch.
Signed-off-by: Haren Myneni
Acked-by: Herbert Xu
---
drivers/crypto/nx/Makefile | 2 +-
drivers/crypto/nx/{nx-842
and also handles the fault by updating the CSB.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 108 +++
1 file changed, 108 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index fe375f7a7029
) and unregister to remove this entry.
The user space process opens this device node and makes an ioctl
to allocate VAS window. The close interface is used to deallocate
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 4 +
arch/powerpc/platforms/pseries
).
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/pseries/vas.c | 124 +++
1 file changed, 124 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/vas.c
b/arch/powerpc/platforms/pseries/vas.c
index fec280979d50..98109a13f1c2 100644
--- a/arch/powerpc/platforms
VAS capabilities
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas Piggin
---
arch/powerpc/platforms/pseries/vas.c | 181 +++
1 file changed, 181 insertions(+)
create mode 100644 arch/powerpc/platforms/pseries/vas.c
diff --git a/arch/powerpc/platforms/pseries/vas.c
b
. But the process can pass
VAS_TX_WIN_FLAG_QOS_CREDIT flag with VAS_TX_WIN_OPEN ioctl to open
QoS type window.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/uapi/asm/vas-api.h | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/uapi/asm/vas-api.h
b
This patch adds hcalls and other definitions. Also define structs
that are used in VAS implementation on PowerVM.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/hvcall.h| 7 ++
arch/powerpc/include/asm/vas.h | 30 +++
arch/powerpc/platforms/pseries/vas.h | 125
(pnv_vas_window on PowerNV). Also adds
the corresponding changes in PowerNV vas code.
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h | 14 +-
arch/powerpc/platforms/powernv/vas-debug.c | 27 ++--
arch/powerpc/platforms/powernv/vas-fault.c | 20 +--
arch/powerpc/platforms
is not changed.
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas Piggin
---
arch/powerpc/include/asm/vas.h | 3 +
arch/powerpc/platforms/book3s/vas-api.c| 147 +++
arch/powerpc/platforms/powernv/vas-fault.c | 155 ++---
3 files changed, 159
Take pid and mm references when each window opens and drops during
close. This functionality is needed for powerNV and pseries. So
this patch defines the existing code as functions in common book3s
platform vas-api.c
Signed-off-by: Haren Myneni
---
arch/powerpc/include/asm/vas.h
PowerNV uses registers to open/close VAS windows, and getting the
paste address. Whereas the hypervisor calls are used on PowerVM.
This patch adds the platform specific user space window operations
and register with the common VAS user space interface.
Signed-off-by: Haren Myneni
---
arch
powerNV and pseries drivers register / unregister to the corresponding
platform specific VAS separately. Then these VAS functions call the
common API with the specific window operations. So rename powerNV VAS
API register/unregister functions.
Signed-off-by: Haren Myneni
Reviewed-by: Nicholas
Using the same /dev/crypto/nx-gzip interface for both powerNV and
pseries. So this patch creates platforms/book3s/ and moves VAS API
to that directory. The actual functionality is not changed.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/Kconfig| 1 +
arch
kernel.org # 5.8+
Signed-off-by: Haren Myneni
Reported-by: Nicholas Piggin
---
arch/powerpc/platforms/powernv/vas-window.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas-window.c
b/arch/powerpc/platforms/powernv/vas-wind
o fix tgid reference release. This fix
should be also included in stable 5.8+
- Define platform specific VAS window structs
- Define helper functions to take and release pid, tgid
and mm references
- Other cleanup suggestions
Haren Myneni (17):
powerpc/powernv/vas: Release
On Fri, 2021-06-04 at 21:52 +1000, Michael Ellerman wrote:
> Haren Myneni writes:
> > This patch adds the following HCALL wrapper functions to allocate,
>
> Normal spelling is "hcall".
>
> > modify and deallocate VAS windows, and retrieve VAS capabiliti
On Fri, 2021-06-04 at 21:52 +1000, Michael Ellerman wrote:
> Haren Myneni writes:
> > On Thu, 2021-06-03 at 14:38 +1000, Nicholas Piggin wrote:
> > > Excerpts from Haren Myneni's message of May 21, 2021 7:33 pm:
> > > > Same vas_window struct is used on powerNV and
On Fri, 2021-06-04 at 21:52 +1000, Michael Ellerman wrote:
> Haren Myneni writes:
> > On Thu, 2021-06-03 at 14:57 +1000, Nicholas Piggin wrote:
> > > Excerpts from Haren Myneni's message of May 21, 2021 7:42 pm:
> > > > Changes to export the following NXGZIP capa
the
> > corresponding modifications in powerNV vas code.
> >
> > On powerNV, vas_window is used for both TX and RX windows, whereas
> > only for TX windows on powerVM. So some elements are specific to
> > these platforms.
> >
> > Signed-off-by: Haren Myneni
defines the existing code as functions in common book3s
> > platform vas-api.c
> >
> > Signed-off-by: Haren Myneni
>
> Seems like a good idea to put these into their own helper functions.
>
> > ---
> > arch/powerpc/include/asm/vas.h | 25 +++
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