NX may be processing requests while trying to close window. Wait until
all credits are returned and then free send window from VAS instance.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/
Process can not close send window until all requests are processed.
Means wait until window state is not busy and send credits are
returned. Display debug message in case taking longer to close the
window.
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-window.c | 26 +++
NX expects OS to return credit for send window after processing each
fault. Also credit has to be returned even for fault window.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 10 ++
arch/powerpc/platforms/powernv/vas-
System checkstops if RxFIFO overruns with more requests than the
maximum possible number of CRBs allowed in FIFO at any time. So
max credits value (rxattr.wcreds_max) is set and is passed to
vas_rx_win_open() by the the driver.
Signed-off-by:Haren Myneni
---
arch/powerpc/platforms/powernv/vas-
In multi-thread applications, child can open a window but release FD
will not be called upon its exit. NX Send window will be closed with
release function. Parent thread will be closing it later upon its exit.
The parent can also send NX requests with this window and NX can
generate page faults.
Dump FIFO values if could not find send window and print CRB for
debugging.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 40 ++
1 file changed, 40 insertions(+)
diff --git a/arch/powerpc/platforms/
For each fault CRB, update fault address in CRB (fault_storage_addr)
and translation error status in CSB. If the actual fault is in CSB,
send signal to process with SIGSEGV. Process can send new request by
touching the fault address.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Mynen
NX pastes CRB in fault FIFO and generates interrupt whenever faults
on CRB. OS reads CRBs from fault FIFO and process them by setting
faulting address in fault_storge_addr in CRB and update CSB. When CSB
status is changed, process sends NX request after touching the fault
address.
Signed-off-by:
Fault handler is created as kernel thread for each VAS instance and
invoked whenever NX generates page fault. This thread reads CRBs
from fault FIFO and process them.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/vas-fault.c | 53 +++
Setup fault window for each VAS instance. When NX gets fault on request
buffer, write fault CRBs in the corresponding fault FIFO and then sends
an interrupt to the OS.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren Myneni
---
arch/powerpc/platforms/powernv/Makefile | 2 +-
arch
Read interrupt and port values from the device tree, setup IRQ
mapping and register IRQ for each VAS instance. Set port value for
each NX window. When NX sees a fault on CRB, kernel gets an interrupt
and handles the fault.
IRQ setup and fault handling is needed only for user space send
windows.
Kernel sets fault address and status in CRB for NX page fault on user
space address after processing page fault. User space gets the signal
and handles the fault mentioned in CRB by bringing the page in to
memory and send NX request again.
Signed-off-by: Sukadev Bhattiprolu
Signed-off-by: Haren
This reverts commit 452d23c0f6bd97f2fd8a9691fee79b76040a0feb.
User space send windows (NX GZIP compression) need vas_win_paste_addr()
to mmap window paste address and vas_win_id() to get window ID when
window address is given.
vas_win_id() is introduced in original commit 61f3cca8cda97 (powerpc
Applications can send compression / decompression requests to NX with
COPY/PASTE instructions. When NX is processing these requests, can hit
fault on the request buffer (not in memory). It issues an interrupt and
pastes fault CRB in fault FIFO. Expects kernel to handle this fault and
return credi
From: David Hildenbrand
[ Upstream commit 5666848774ef43d3db5151ec518f1deb63515c20 ]
Let's perform all checking + offlining + removing under
device_hotplug_lock, so nobody can mess with these devices via sysfs
concurrently.
[da...@redhat.com: take device_hotplug_lock outside of loop]
Link: ht
From: David Hildenbrand
[ Upstream commit 5666848774ef43d3db5151ec518f1deb63515c20 ]
Let's perform all checking + offlining + removing under
device_hotplug_lock, so nobody can mess with these devices via sysfs
concurrently.
[da...@redhat.com: take device_hotplug_lock outside of loop]
Link: ht
On Fri, Oct 18, 2019 at 3:54 PM Rasmus Villemoes
wrote:
>
> On 18/10/2019 22.16, Leo Li wrote:
> >
> >>
> >> There have been several attempts in the past few years to allow building
> >> the
> >> QUICC engine drivers for platforms other than PPC. This is (the beginning
> >> of)
> >> yet another
(Adding Stephen Rothwell)
On Fri, 2019-10-18 at 17:22 +0200, Christoph Hellwig wrote:
> As I said before: please just send Linus a scripted conversion after
> the next -rc1. There is no point in creating all this churn.
I again ask for a scripted mechanism to be added to
-next to allow these ty
As I said before: please just send Linus a scripted conversion after
the next -rc1. There is no point in creating all this churn.
On Fri 2019-10-18 11:17:10, Kefeng Wang wrote:
> There are pr_warning and pr_warng to show WARNING level message,
> most of the code using pr_warn, number based on next-20191017,
>
> pr_warn: 5206 pr_warning: 546 (tools: 399, others: 147)
>
> Let's carry on with the work to standardize the logg
On 18/10/2019 22.16, Leo Li wrote:
>
>>
>> There have been several attempts in the past few years to allow building the
>> QUICC engine drivers for platforms other than PPC. This is (the beginning of)
>> yet another attempt. I hope I can get someone to pick up these relatively
>> trivial patches (
> -Original Message-
> From: Rasmus Villemoes
> Sent: Friday, October 18, 2019 7:52 AM
> To: Qiang Zhao ; Leo Li ; Greg
> Kroah-Hartman ; Jiri Slaby
> ; Timur Tabi ; linuxppc-
> d...@lists.ozlabs.org; linux-arm-ker...@lists.infradead.org; linux-
> ker...@vger.kernel.org; linux-ser...@vg
On Fri, Oct 18, 2019 at 12:00:22PM -0700, Nathan Chancellor wrote:
> Just as an FYI, there was some more discussion around the availablity
> and use of bcmp in this LLVM bug which spawned
> commit 5f074f3e192f ("lib/string.c: implement a basic bcmp").
>
> https://bugs.llvm.org/show_bug.cgi?id=4103
On Mon, Oct 14, 2019 at 02:11:41PM -0500, Segher Boessenkool wrote:
> On Mon, Oct 14, 2019 at 08:56:12AM -0700, Nick Desaulniers wrote:
> > On Mon, Oct 14, 2019 at 2:35 AM Segher Boessenkool
> > wrote:
> > >
> > > On Sun, Oct 13, 2019 at 07:51:01PM -0700, Nathan Chancellor wrote:
> > > > r374662 g
On Fri, Oct 18, 2019 at 02:52:31PM +0200, Rasmus Villemoes wrote:
> /* wait for the QE_CR_FLG to clear */
> - ret = spin_event_timeout((ioread32be(&qe_immr->cp.cecr) & QE_CR_FLG) ==
> 0,
> - 100, 0);
> - /* On timeout (e.g. failure), the expression will b
It was <2019-10-16 śro 12:46>, when YueHaibing wrote:
> Use devm_platform_ioremap_resource() to simplify the code a bit.
> This is detected by coccinelle.
>
> Signed-off-by: YueHaibing
> ---
> drivers/char/hw_random/exynos-trng.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
Acked
On Wed, Sep 11, 2019 at 01:34:33PM -0300, Thiago Jung Bauermann wrote:
> The ultravisor will do an integrity check of the kernel image but we
> relocated it so the check will fail. Restore the original image by
> relocating it back to the kernel virtual base address.
>
> This works because during
Add a sys interface to allow querying the memory reserved by FADump for
saving the crash dump.
Also added Documentation/ABI for the new sysfs file.
Signed-off-by: Sourabh Jain
---
Documentation/ABI/testing/sysfs-kernel-fadump| 7 +++
Documentation/powerpc/firmware-assisted-dump.rst |
Add the missing ABI documentation for the already available FADump
sysfs files.
Signed-off-by: Sourabh Jain
---
Documentation/ABI/testing/sysfs-kernel-fadump_enabled | 7 +++
Documentation/ABI/testing/sysfs-kernel-fadump_registered | 8
Documentation/ABI/testing/sysfs-kernel-fa
The /sys/kernel/fadump_* sysfs files are replicated under
/sys/kernel/fadump/ directory. But we need to keep the old
sysfs files to maintain the backward compatibility.
The sysfs files are scheduled to remove by 2021.
Signed-off-by: Sourabh Jain
---
.../sysfs-kernel-fadump_enabled
As the number of FADump sysfs files increases it is hard to manage all of
them inside /sys/kernel directory. It's better to have all the FADump
related sysfs files in a dedicated directory /sys/kernel/fadump. But in
order to maintain the backward compatibility the /sys/kernel/fadump_*
sysfs files a
Currently, FADump sysfs files are present inside /sys/kernel directory.
But as the number of FADump sysfs file increases it is not a good idea to
push all of them in /sys/kernel directory. It is better to have separate
directory to keep all the FADump sysfs files.
The patch series reorganizes the
Le 18/10/2019 à 14:52, Rasmus Villemoes a écrit :
The actual io accessors (e.g. in_be32) implicitly add a volatile
qualifier to their address argument. Remove volatile from the struct
definition and the qe_ic_(read/write) helpers, in preparation for
switching from the ppc-specific io accessors
Le 18/10/2019 à 14:52, Rasmus Villemoes a écrit :
Signed-off-by: Rasmus Villemoes
---
drivers/soc/fsl/qe/qe.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c
index 417df7e19281..6fcbfad408de 100644
--- a/drivers/soc/
This driver uses #defines from asm/cpm.h, so instead of relying on
some other header pulling that in, do that explicitly.
Signed-off-by: Rasmus Villemoes
---
drivers/tty/serial/ucc_uart.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_u
In preparation for allowing QE to be built for architectures other
than ppc, use the generic readx_poll_timeout_atomic() helper from
iopoll.h rather than the ppc-only spin_event_timeout().
Signed-off-by: Rasmus Villemoes
---
drivers/soc/fsl/qe/qe.c | 13 +++--
1 file changed, 7 insertion
In preparation for allowing to build QE support for architectures
other than PPC, replace the ppc-specific io accessors. Done via
$ spatch --sp-file io.cocci --in-place drivers/soc/fsl/qe/
where io.cocci is
@@
expression addr, val;
@@
- out_be32(addr, val)
+ iowrite32be(val, addr)
@@
expression
There have been several attempts in the past few years to allow
building the QUICC engine drivers for platforms other than PPC. This
is (the beginning of) yet another attempt. I hope I can get someone to
pick up these relatively trivial patches (I _think_ they shouldn't
change functionality at all)
The actual io accessors (e.g. in_be32) implicitly add a volatile
qualifier to their address argument. Remove volatile from the struct
definition and the qe_ic_(read/write) helpers, in preparation for
switching from the ppc-specific io accessors to generic ones.
Signed-off-by: Rasmus Villemoes
---
Signed-off-by: Rasmus Villemoes
---
drivers/soc/fsl/qe/qe.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c
index 417df7e19281..6fcbfad408de 100644
--- a/drivers/soc/fsl/qe/qe.c
+++ b/drivers/soc/fsl/qe/qe.c
@@ -378,8 +378,
On 10/16/19 4:22 PM, Mark Rutland wrote:
> Hi Andrey,
>
> On Wed, Oct 16, 2019 at 03:19:50PM +0300, Andrey Ryabinin wrote:
>> On 10/14/19 4:57 PM, Daniel Axtens wrote:
> + /*
> + * Ensure poisoning is visible before the shadow is made visible
> + * to other CPUs.
> + */
>
walk_page_range() is going to be allowed to walk page tables other than
those of user space. For this it needs to know when it has reached a
'leaf' entry in the page tables. This information is provided by the
p?d_leaf() functions/macros.
For powerpc pmd_large() already exists and does what we wan
On Sat, Oct 12, 2019 at 09:39:14PM -0700, Eric Biggers wrote:
> This series converts the PowerPC Nest (NX) implementations of AES modes
> from the deprecated "blkcipher" API to the "skcipher" API. This is
> needed in order for the blkcipher API to be removed.
>
> This patchset is compile-tested o
On 18/10/19 5:46 pm, Christophe Leroy wrote:
Le 17/10/2019 à 09:36, Andrew Donnellan a écrit :
On 10/9/19 7:16 pm, Christophe Leroy wrote:
+#if defined(CONFIG_VMAP_STACK) && CONFIG_THREAD_SHIFT < PAGE_SHIFT
+#define THREAD_SHIFT PAGE_SHIFT
+#else
#define THREAD_SHIFT CONFIG_TH
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