On Fri, Oct 27, 2017 at 10:57:13AM +0530, Aneesh Kumar K.V wrote:
>
>
> On 10/27/2017 10:04 AM, Paul Mackerras wrote:
> >How do we interpret these numbers? Are they times, or speed? Is
> >larger better or worse?
>
> Sorry for not including the details. They are time in seconds. Test case is
>
On 10/27/2017 10:04 AM, Paul Mackerras wrote:
On Fri, Oct 27, 2017 at 09:38:17AM +0530, Aneesh Kumar K.V wrote:
Hi,
With hash translation mode we always tracked the hash pte slot details in linux
page table.
This occupied space in the linux page table and also limitted our ability to
suppor
On Fri, Oct 27, 2017 at 09:38:17AM +0530, Aneesh Kumar K.V wrote:
> Hi,
>
> With hash translation mode we always tracked the hash pte slot details in
> linux page table.
> This occupied space in the linux page table and also limitted our ability to
> support
> linux features that require additio
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/platforms/pseries/lpar.c | 24
1 file changed, 24 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/lpar.c
b/arch/powerpc/platforms/pseries/lpar.c
index cd5cf5bd53f1..41512aaa8c8e 100644
--- a/arch/powerpc/platfor
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/platforms/pseries/lpar.c | 40 ---
1 file changed, 32 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/lpar.c
b/arch/powerpc/platforms/pseries/lpar.c
index 4ea9224cbeb6..6dffdf654a28 100644
---
arch/powerpc/platforms/pseries/lpar.c | 51 +--
1 file changed, 31 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/lpar.c
b/arch/powerpc/platforms/pseries/lpar.c
index 41512aaa8c8e..4ea9224cbeb6 100644
--- a/arch/powerpc/platforms/ps
We will use this feature to check whether hypervisor implements hash based
remove and protect hcalls
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/include/asm/firmware.h | 3 ++-
arch/powerpc/kvm/powerpc.c| 4
arch/powerpc/platforms/pseries/firmware.c | 1 +
include
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/platforms/pseries/lpar.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/pseries/lpar.c
b/arch/powerpc/platforms/pseries/lpar.c
index 52d2e3038c05..cd5cf5bd53f1 100644
--- a/arch/powerpc/platforms/p
This is equivalent to H_BULK_REMOVE hcall, but then takes hash value as the arg
instead of hashpte slot number. We will use this later to speed up bulk remove
operation in guest. Instead of finding slot number using H_READ4 hcall, we can
use hash value directly using this hcall.
only support H_AVP
This is equivalent to H_PROTECT hcall, but then takes hash value as the arg
instead of hashpte slot number. We will use this later to speed up invalidate
operation in guest. Instead of finding slot number using H_READ4 hcall, we can
use hash value directly using this hcall.
H_AVPN flag value is ne
This is equivalent to H_REMOVE hcall, but then takes hash value as the arg
instead of hashpte slot number. We will use this later to speed up invalidate
operation in guest. Instead of finding slot number using H_READ4 hcall, we can
use hash value directly using this hcall.
Only support flag value
Now that we have updated all MMU hash operations to work with hash value instead
of slot, remove slot tracking completely. We also remove real_pte because
without slot tracking 4k, 64k and 64k subpages all have similar pte format.
One of the side effect of this is, we now don't track whether we ha
Add hash based updatepp callback and use that during hash pte fault.
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 6 +
arch/powerpc/mm/hash64_4k.c | 7 +
arch/powerpc/mm/hash64_64k.c | 19 +++---
arch/pow
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/mm/hash_native_64.c | 28
arch/powerpc/platforms/pseries/lpar.c | 17 -
2 files changed, 16 insertions(+), 29 deletions(-)
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_nativ
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/mm/hash_utils_64.c | 32 +---
1 file changed, 5 insertions(+), 27 deletions(-)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index b197fe57547e..8635b241e2d5 100644
--- a/arch/powerpc/mm
Add hash based invalidate callback and use that in flush_hash_page.
Note: In a later patch, we will drop the slot tracking completely. At that point
we will also loose the __rpte_sub_valid() check in
pte_iterate_hashed_subpages(). That means we call the invalidate for all
subpages irrespective of w
The helper now also does a secondary hash search so that we can use this in
other
functions.
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/mm/hash_native_64.c | 73
1 file changed, 44 insertions(+), 29 deletions(-)
diff --git a/arch/powerpc/mm/hash_n
The helper now also does secondary hash search so that we can use this in other
functions.
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/platforms/pseries/lpar.c | 28 +---
1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/l
When computing the starting slot number for a hash page table group we used
to do this
hpte_group = ((hash & htab_hash_mask) * HPTES_PER_GROUP) & ~0x7UL;
Multiplying with 8 (HPTES_PER_GROUP) imply the last three bits are 0. Hence we
really don't need to clear then separately.
Signed-off-by: Anees
Hi,
With hash translation mode we always tracked the hash pte slot details in linux
page table.
This occupied space in the linux page table and also limitted our ability to
support
linux features that require additional PTE bits. This series attempt to lift
this
limitation by not tracking slot
This adds trace_map/trace_unmap tracepoints to spapr driver. Type1 already
uses these via the IOMMU API (iommu_map/__iommu_unmap).
Signed-off-by: Alexey Kardashevskiy
---
Example:
qemu-system-ppc-8655 [096] 724.662740: unmap:IOMMU:
iova=0x3000 size=4096 unmapped_
The IOP interrupt handler iop_ism_irq() is used by the adb-iop
driver to poll for ADB request completion. Unfortunately, it is not
re-entrant. Fix the race condition by adding an iop_ism_irq_poll()
function with suitable mutual exclusion.
Tested-by: Stan Johnson
Signed-off-by: Finn Thain
Cc: Ben
On Thu, 2017-10-26 at 20:47 -0200, Thiago Jung Bauermann wrote:
> Mimi Zohar writes:
>
> > On Tue, 2017-10-17 at 22:53 -0200, Thiago Jung Bauermann wrote:
> >> IMA will use the module_signature format for append signatures, so export
> >> the relevant definitions and factor out the code which ver
Mimi Zohar writes:
> On Tue, 2017-10-17 at 22:53 -0200, Thiago Jung Bauermann wrote:
>> IMA will use the module_signature format for append signatures, so export
>> the relevant definitions and factor out the code which verifies that the
>> appended signature trailer is valid.
>>
>> Also, creat
Hello Mimi,
Thanks for your review.
Mimi Zohar writes:
> On Tue, 2017-10-17 at 22:53 -0200, Thiago Jung Bauermann wrote:
>
>> diff --git a/security/integrity/ima/ima_main.c
>> b/security/integrity/ima/ima_main.c
>> index 6a2d960fbd92..0d3390de7432 100644
>> --- a/security/integrity/ima/ima_ma
On Tue, 2017-10-17 at 22:53 -0200, Thiago Jung Bauermann wrote:
> Hello,
>
> The main highlight in this version is that it fixes a bug where the modsig
> wasn't being included in the measurement list if the appraised file was
> already measured by another rule. The fix is in the last patch.
>
> A
pseries/nodes: On pseries systems which allow 'hot-add' of CPU,
it may occur that the new resources are to be inserted into nodes
that were not used for memory resources at bootup. Many different
configurations of PowerPC resources may need to be supported depending
upon the environment. This pat
pseries/nodes: On pseries systems which allow 'hot-add' of CPU or
memory resources, it may occur that the new resources are to be
inserted into nodes that were not used for these resources at bootup.
In the kernel, any node that is used must be defined and initialized.
This patch ensures that suffi
pseries/nodes: Ensure enough nodes avail for operations
pseries/initnodes: Ensure nodes initialized for hotplug
Signed-off-by: Michael Bringmann
Michael Bringmann (2):
pseries/nodes: Ensure enough nodes avail for operations
pseries/initnodes: Ensure nodes initialized for hotplug
---
Changes
On Tue, 2017-10-17 at 22:53 -0200, Thiago Jung Bauermann wrote:
> IMA will need to access the digest used in the signature so that it can
> verify files containing module-style appended signatures. For this purpose,
> add function pkcs7_get_message_sig.
>
> It will also need to verify an already p
On Tue, 2017-10-17 at 22:53 -0200, Thiago Jung Bauermann wrote:
> IMA will use the module_signature format for append signatures, so export
> the relevant definitions and factor out the code which verifies that the
> appended signature trailer is valid.
>
> Also, create a CONFIG_MODULE_SIG_FORMAT
On Tue, 2017-10-17 at 22:53 -0200, Thiago Jung Bauermann wrote:
> diff --git a/security/integrity/ima/ima_main.c
> b/security/integrity/ima/ima_main.c
> index 6a2d960fbd92..0d3390de7432 100644
> --- a/security/integrity/ima/ima_main.c
> +++ b/security/integrity/ima/ima_main.c
> @@ -246,7 +246,35
Hi Cyril, Mikey,
On Thu, Oct 26, 2017 at 03:57:33PM +1100, Cyril Bur wrote:
> On Wed, 2017-07-05 at 11:02 +1000, Michael Neuling wrote:
> > On Tue, 2017-07-04 at 16:45 -0400, Gustavo Romero wrote:
> > > Currently tm_reclaim() can return with a corrupted vs0 (fp0) or vs32 (v0)
> > > due to the fact
Using irq_work for processing OPAL events can cause latency spikes and
is not really required. OPAL events are not performance critical, and
we already have kopald to poll and run events, so have kopald run them
all. Rather than scheduling them as irq_work, just run them directly
from kopald. Enabl
Hello Laurent,
Message-ID: <7ca80231-fe02-a3a7-84bc-ce81690ea...@intel.com> shows
significant slowdown even for brk/malloc ops both single and
multi threaded.
The single threaded case I think is the most important because it has
zero chance of getting back any benefit later during page faults.
C
Some regression is found by LKP-tools(linux kernel performance) on this patch
series
tested on Intel 2s/4s Skylake platform.
The regression result is sorted by the metric will-it-scale.per_process_ops.
Branch:Laurent-Dufour/Speculative-page-faults/20171011-213456(V4 patch series)
Commit id:
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