Hello Alexey, thank you for the feedback!
On Mon, 2020-06-22 at 20:02 +1000, Alexey Kardashevskiy wrote:
>
> On 19/06/2020 15:06, Leonardo Bras wrote:
> > From LoPAR level 2.8, "ibm,ddw-extensions" index 3 can make the number of
> > outputs from "ibm,que
" returned %d\n", ddw_avail[0], cfg_addr, BUID_HI(buid),
> > > > - BUID_LO(buid), ret);
> > > > return ret;
> > > > }
> > > >
> > > > @@ -1040,7 +1075,7 @@ static u64 enable_ddw(struct pci_dev *dev, struct
> > > > device_node *pdn)
> > > > * of page sizes: supported and supported for migrate-dma.
> > > > */
> > > > dn = pci_device_to_OF_node(dev);
> > > > - ret = query_ddw(dev, ddw_avail, );
> > > > + ret = query_ddw(dev, ddw_avail, , pdn);
> > > > if (ret != 0)
> > > > goto out_failed;
> > > >
> > > > @@ -1068,7 +1103,7 @@ static u64 enable_ddw(struct pci_dev *dev, struct
> > > > device_node *pdn)
> > > > /* check largest block * page size > max memory hotplug addr */
> > > > max_addr = ddw_memory_hotplug_max();
> > > > if (query.largest_available_block < (max_addr >> page_shift)) {
> > > > - dev_dbg(>dev, "can't map partition max 0x%llx with
> > > > %u "
> > > > + dev_dbg(>dev, "can't map partition max 0x%llx with
> > > > %llu "
> > > > "%llu-sized pages\n", max_addr,
> > > > query.largest_available_block,
> > > > 1ULL << page_shift);
> > > > goto out_failed;
> > > >
> >
> > Best regards,
> > Leonardo
> >
Best regards,
Leonardo Bras
On Tue, 2020-06-23 at 11:11 +1000, Alexey Kardashevskiy wrote:
>
> On 23/06/2020 04:58, Leonardo Bras wrote:
> > Hello Alexey, thanks for the feedback!
> >
> > On Mon, 2020-06-22 at 20:02 +1000, Alexey Kardashevskiy wrote:
> > > On 19/06/2020 15:06, Leona
On Tue, 2020-06-23 at 11:11 +1000, Alexey Kardashevskiy wrote:
>
> On 23/06/2020 04:59, Leonardo Bras wrote:
> > Hello Alexey, thanks for the feedback!
> >
> > On Mon, 2020-06-22 at 20:02 +1000, Alexey Kardashevskiy wrote:
> > > On 19/06/2020 15:06, Leonardo
On Tue, 2020-06-23 at 11:33 +1000, Oliver O'Halloran wrote:
> On Tue, Jun 23, 2020 at 11:12 AM Alexey Kardashevskiy wrote:
> > On 23/06/2020 04:59, Leonardo Bras wrote:
> > > > Also, despite this particular file, the "pdn" name is usually used for
> > >
On Tue, 2020-06-23 at 12:35 +1000, Alexey Kardashevskiy wrote:
> > I am not sure if this is true in general, but in this device (SR-IOV
> > VF) I am testing it will return 0 windows if the default DMA window is
> > not deleted, and 1 after it's deleted.
>
> Since pHyp can only create windows in
On Tue, 2020-06-23 at 11:12 +1000, Alexey Kardashevskiy wrote:
>
> On 23/06/2020 04:59, Leonardo Bras wrote:
> > Hello Alexey, thanks for the feedback!
> >
> > On Mon, 2020-06-22 at 20:02 +1000, Alexey Kardashevskiy wrote:
> > > On 19/06/2020 15:06, Leonardo Br
time value, available in "ibm,dma-window" device tree node.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 70 ++
1 file changed, 61 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/powerpc/platf
before removing it.
- Fix 'unitialized use' (found by travis mpe:ci-test)
- New patches #5 and #6
Special thanks for Alexey Kardashevskiy and Oliver O'Halloran for
the feedback provided!
Leonardo Bras (6):
powerpc/pseries/iommu: Create defines for operations in
ibm,ddw-applicable
powerpc
As of today, if a DDW is created and can't map the whole partition, it's
removed and the default DMA window "ibm,dma-window" is used instead.
Usually this DDW is bigger than the default DMA window, so it would be
better to make use of it instead.
Signed-off-by: Leonardo Bras
---
ar
if the address is non-null, check directly if
the DDW maps the whole partition, so it can bypass iommu.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 17 -
1 file changed, 8 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b
Create defines to help handling ibm,ddw-applicable values, avoiding
confusion about the index of given operations.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 40 +++---
1 file changed, 23 insertions(+), 17 deletions(-)
diff --git a/arch
;.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 45 +++---
1 file changed, 27 insertions(+), 18 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/powerpc/platforms/pseries/iommu.c
index 558e5441c355..a8840d9e1c35 100644
s up
shifting page_size and migration_capable.
This ends up requiring the update of
ddw_query_response->largest_available_block from u32 to u64, and manually
assigning the values from the buffer into this struct, according to
output size.
Signed-off-by: Leonardo Bras
---
arch/powerpc/plat
On Wed, 2020-06-24 at 03:24 -0300, Leonardo Bras wrote:
> As of today, enable_ddw() will return a non-null DMA address if the
> created DDW maps the whole partition. If the address is valid,
> iommu_bypass_supported_pSeriesLP() will consider iommu bypass enabled.
>
> This can cau
On Fri, 2020-06-26 at 12:23 -0300, Leonardo Bras wrote:
> On Wed, 2020-06-24 at 03:24 -0300, Leonardo Bras wrote:
> > As of today, if a DDW is created and can't map the whole partition, it's
> > removed and the default DMA window "ibm,dma-window" is used instead.
to remove the
default DMA window before query_ddw() and the rtas call from patch #2
to recover it if something goes wrong.
All patches were tested into an LPAR with an Ethernet VF:
4005:01:00.0 Ethernet controller: Mellanox Technologies MT27700 Family
[ConnectX-4 Virtual Function]
Leonardo Bras (4
they only
allow one DMA window.
If setting up a new DDW fails anywhere after the removal of this
default DMA window, restore it using reset_dma_window.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 20 +---
1 file changed, 17 insertions(+), 3 deletion
by resetting the TCE table allocation for the PE to it's
boot time value, available in "ibm,dma-window" device tree node.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 33 ++
1 file changed, 33 insertions(+)
diff --git a/arch/powerpc
;.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 53 +++---
1 file changed, 31 insertions(+), 22 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/powerpc/platforms/pseries/iommu.c
index 5e1fbc176a37..de633f6ae093 100644
s up
shifting page_size and migration_capable.
This ends up requiring the update of
ddw_query_response->largest_available_block from u32 to u64, and manually
assigning the values from the buffer into this struct, according to
output size.
Signed-off-by: Leonardo Bras
---
arch/powerpc/plat
On Wed, 2020-07-22 at 11:28 +1000, Alexey Kardashevskiy wrote:
>
> On 22/07/2020 08:13, Leonardo Bras wrote:
> > On Tue, 2020-07-21 at 14:59 +1000, Alexey Kardashevskiy wrote:
> > > On 16/07/2020 17:16, Leonardo Bras wrote:
> > > > Move the part of iommu_table_fr
On Tue, 2020-07-21 at 19:52 -0500, Brian King wrote:
> >
> > As of today, there seems to be nothing like that happening in the
> > driver I am testing.
> > I spoke to Brian King on slack, and he mentioned that at the point DDW
> > is created there should be no allocations in place.
>
> I think
://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=184420=%2A=both
Special thanks for Alexey Kardashevskiy, Brian King and
Oliver O'Halloran for the feedback provided!
Leonardo Bras (7):
powerpc/pseries/iommu: Create defines for operations in
ibm,ddw-applicable
powerpc/pseries/iommu: Update call
Create defines to help handling ibm,ddw-applicable values, avoiding
confusion about the index of given operations.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 43 --
1 file changed, 26 insertions(+), 17 deletions(-)
diff --git a/arch
-off-by: Leonardo Bras
---
arch/powerpc/kernel/iommu.c | 30 ++
1 file changed, 18 insertions(+), 12 deletions(-)
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 9704f3f76e63..c3242253a4e7 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch
time value, available in "ibm,dma-window" device tree node.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 73 +++---
1 file changed, 66 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/power
suggested by LoPAR: First reading the size of the extension array from
index 0, checking if the property exists, and then returning it's value.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 91 +++---
1 file changed, 81 insertions(+), 10 delet
that it can be used for both kinds of mapping.
Also, defines DEFAULT_DMA_WIN as "ibm,dma-window" to document that
it's the name of the default DMA window.
Those changes are not supposed to change how the code works in any
way, just adjust naming.
Signed-off-by: Leonardo Bras
---
ar
t;
looks the right thing to do.
Signed-off-by: Leonardo Bras
---
arch/powerpc/include/asm/iommu.h | 3 ++
arch/powerpc/kernel/iommu.c| 15 +
arch/powerpc/platforms/pseries/iommu.c | 46 +++---
3 files changed, 52 insertions(+), 12 deletions(-)
diff --
;.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 45 +++---
1 file changed, 27 insertions(+), 18 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/arch/powerpc/platforms/pseries/iommu.c
index 1a933c4e8bba..4e33147825cc 100644
Signed-off-by: Leonardo Bras
---
arch/powerpc/include/asm/hvcall.h| 2 +-
arch/powerpc/kvm/trace_hv.h | 2 +-
tools/perf/arch/powerpc/util/book3s_hcalls.h | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/hvcall.h
b/arch/powerpc/i
(arg &= 0x3f) : Gets (RB) 58:63, missing bit 57
Fixes this by applying the correct mask.
Signed-off-by: Leonardo Bras
---
Changes since v1:
- Commit message 's/LSB/MSB/', because ISA ordering is big-endian.
arch/powerpc/kvm/book3s_hv.c | 6 +++---
1 file changed, 3 insertions(+
(arg &= 0x3f) : Gets (RB) 58:63, missing bit 57
Fixes this by applying the correct mask.
Signed-off-by: Leonardo Bras
---
arch/powerpc/kvm/book3s_hv.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_
to temporarily disable all HPT
resize-downs before hotunplug, re-enable them after hotunplug ends,
and then resize-down HPT to the current memory size.
As an example, hotunplugging 256GB from a 385GB guest took 621s without
this patch, and 100s after applied.
Signed-off-by: Leonardo Bras
---
arch
CC: David Gibson
http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=241574=%2A=both
Thanks Alexey!
On Fri, 2021-04-23 at 17:27 +1000, Alexey Kardashevskiy wrote:
>
> On 22/04/2021 17:07, Leonardo Bras wrote:
> > Some functions assume IOMMU page size can only be 4K (pageshift == 12).
> > Update them to accept any page size passed, so we can use 64K pages.
>
memory
hotplug times.
As an example, hotplugging 256GB on a 129GB guest took 710s without this
patch, and 21s after applied.
Signed-off-by: Leonardo Bras
---
arch/powerpc/mm/book3s64/hash_utils.c | 36 ---
1 file changed, 21 insertions(+), 15 deletions(-)
diff --git a/arch
memory:
Adding 256G to a 2GB guest, for example will require 8 HPT resizes.
Perform an HPT resize before memory hotplug, updating HPT to its
final size (considering a successful hotplug), taking the number of
HPT resizes to at most one per memory hotplug action.
Signed-off-by: Leonardo Bras
---
arch
LMB
Best regards,
Leonardo Bras (3):
powerpc/mm/hash: Avoid resizing-down HPT on first memory hotplug
powerpc/mm/hash: Avoid multiple HPT resize-ups on memory hotplug
powerpc/mm/hash: Avoid multiple HPT resize-downs on memory hotunplug
arch/powerpc/include/asm/book3s/64/hash.h | 4
On Fri, 2021-04-23 at 19:04 +1000, Alexey Kardashevskiy wrote:
>
> > + win64->name = kstrdup(propname, GFP_KERNEL);
> > + ddwprop = kzalloc(sizeof(*ddwprop), GFP_KERNEL);
> > + win64->value = ddwprop;
> > + win64->length = sizeof(*ddwprop);
> > + if (!win64->name || !win64->value) {
> >
201210=%2A=both
Leonardo Bras (11):
powerpc/pseries/iommu: Replace hard-coded page shift
powerpc/kernel/iommu: Add new iommu_table_in_use() helper
powerpc/pseries/iommu: Add iommu_pseries_alloc_table() helper
powerpc/pseries/iommu: Add ddw_list_new_entry() helper
powerpc/pseries/iommu:
if direct mapping is possible. It can also allow a DMA window
starting at 0x00 to be used.
This will be helpful for using a DDW with indirect mapping, as the window
address will be different than 0x00, but it will not map the whole
partition.
Signed-off-by: Leonardo Bras
Reviewed-by: Alexey
all memory, which looks the most expensive operation, only if
everything else succeeds.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 93 --
1 file changed, 57 insertions(+), 36 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/
ore used, move iommu_table_lpar_multi_ops and
iommu_table_pseries_ops to before their respective iommu_table_setparms*().
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 100 -
1 file changed, 50 insertions(+), 50 deletions(-)
diff --git a/a
There are two functions creating direct_window_list entries in a
similar way, so create a ddw_list_new_entry() to avoid duplicity and
simplify those functions.
Signed-off-by: Leonardo Bras
Reviewed-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/pseries/iommu.c | 32
Creates a helper to allow allocating a new iommu_table without the need
to reallocate the iommu_group.
This will be helpful for replacing the iommu_table for the new DMA window,
after we remove the old one with iommu_tce_table_put().
Signed-off-by: Leonardo Bras
Reviewed-by: Alexey
ift was simple.
tce_free_pSeriesLP() was a special case, since callers not always have a
tbl struct, so adding a tceshift parameter seems the right thing to do.
Signed-off-by: Leonardo Bras
Reviewed-by: Alexey Kardashevskiy
---
arch/powerpc/include/asm/tce.h | 8 --
arch/powe
testing. This causes iommu_table_release_pages() to
become unnecessary, given it is only used to remove reserved memory for
testing.
Also, only allow storing reserved memory values in tbl if they are valid
in the table, so there is no need to check it in the new helper.
Signed-off-by: Leonardo
DIRECT64_PROPNAME.
In order to have this, find_existing_ddw_windows() needs to be able to
look for different property names.
Extract find_existing_ddw_windows() into find_existing_ddw_windows_named()
and calls it with current property name.
Signed-off-by: Leonardo Bras
---
arch/powerpc
Update remove_dma_window() so it can be used to remove DDW with a given
property name.
This enables the creation of new property names for DDW, so we can
have different usage for it, like indirect mapping.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 21
ddr-window-info"
was created to represent a DDW that does not allow direct mapping.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 87 +-
1 file changed, 72 insertions(+), 15 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/ar
that it can be used for both kinds of mapping.
This should cause no behavioural change, just adjust naming.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 93 +-
1 file changed, 48 insertions(+), 45 deletions(-)
diff --git a/arch/powerpc
mp; CONFIG_PPC_BOOK3S_64
> >
> > Or something the user need to select himself in menuconfig?
>
> Yeah I meant a default n thing under powerpc kernel debugging somewhere.
So, IIUC all we can do is split this in 2 changes:
1 - Adding notrace to those functions
2 - Introducing a kernel debug config that reverts (1) and 'fixes' mftb
If that's correct, I have some ideas we can use.
For debug option, should we add the offset on get_tb() or mftb()?
Another option would be to adding this tb_offset only in the routines
used by tracing. But this could probably mean having to add a function
in arch-generic code, but still an option.
What do you think?
>
> Thanks,
> Nick
Thank you!
Leonardo Bras
in
kvmppc_guest_entry_inject_int(), which depending on last tracepoint
acquired could actually cause the host to crash.
Save the Timebase Offset to PACA and use it on sched_clock() to always
get the correct timestamp.
Signed-off-by: Leonardo Bras
Suggested-by: Paul Mackerras
---
Changes since v1
in
kvmppc_guest_entry_inject_int(), which depending on last tracepoint
acquired could actually cause the host to crash.
Save the Timebase Offset to PACA and use it on sched_clock() to always
get the correct timestamp.
Signed-off-by: Leonardo Bras
---
arch/powerpc/include/asm/kvm_book3s_asm.h | 1
upstream
> could you put it under a debug config option?
You mean something that is automatically selected whenever those
configs are enabled?
CONFIG_TRACEPOINT && CONFIG_KVM_BOOK3S_HANDLER && CONFIG_PPC_BOOK3S_64
Or something the user need to select himself in menuconfig?
r 32M, 64M,
128M, 256M and 16G.
Enabling bigger pages would be interesting for direct mapping systems
with a lot of RAM, while using less TCE entries.
Signed-off-by: Leonardo Bras
---
arch/powerpc/include/asm/iommu.h | 8
arch/powerpc/platforms/pseries/io
Add pages on largepool as a last resort for !largealloc, making all pages
of the DMA window available.
Signed-off-by: Leonardo Bras
Reviewed-by: Alexey Kardashevskiy
---
arch/powerpc/kernel/iommu.c | 9 +
1 file changed, 9 insertions(+)
diff --git a/arch/powerpc/kernel/iommu.c b/a
mu_*_coherent() to make sure the size alignment happens only
for IOMMU_PAGE_SIZE() before calling iommu_alloc() and iommu_free().
Also, on iommu_range_alloc(), replace ALIGN(n, 1 << tbl->it_page_shift)
with IOMMU_PAGE_ALIGN(n, tbl), which is easier to read and does the
same.
Signed-off-by: L
memory:
Adding 256G to a 2GB guest, for example will require 8 HPT resizes.
Perform an HPT resize before memory hotplug, updating HPT to its
final size (considering a successful hotplug), taking the number of
HPT resizes to at most one per memory hotplug action.
Signed-off-by: Leonardo Bras
---
arch
to temporarily disable all HPT
resize-downs before hotunplug, re-enable them after hotunplug ends,
and then resize-down HPT to the current memory size.
As an example, hotunplugging 256GB from a 385GB guest took 621s without
this patch, and 100s after applied.
Signed-off-by: Leonardo Bras
---
arch
memory
hotplug times.
As an example, hotplugging 256GB on a 129GB guest took 710s without this
patch, and 21s after applied.
Signed-off-by: Leonardo Bras
---
arch/powerpc/mm/book3s64/hash_utils.c | 36 ---
1 file changed, 21 insertions(+), 15 deletions(-)
diff --git a/arch
, hotunplug = 100s.
Any feedback will be appreciated!
I believe the code may not be very well placed in available files,
so please give some feedback on that.
Best regards,
Leonardo Bras (3):
powerpc/mm/hash: Avoid resizing-down HPT on first memory hotplug
powerpc/mm/hash: Avoid multiple HPT
r 32M, 64M,
128M, 256M and 16G.
Enabling bigger pages would be interesting for direct mapping systems
with a lot of RAM, while using less TCE entries.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 49 ++
1 file changed, 42 insertions(+), 7
e
> resize attempts first.
This batching is something I had thought a lot about.
Problem is that there are a lot of generic interfaces between memory
hotplug and actually resizing HPT. I tried a simpler approach in
patches 2 & 3, so I don't touch much stuff there.
Best regards,
Leonardo Bras
r 32M, 64M,
128M, 256M and 16G.
Enabling bigger pages would be interesting for direct mapping systems
with a lot of RAM, while using less TCE entries.
Signed-off-by: Leonardo Bras
---
Changes since v2:
- Restore 'int array & shift' strategy
- Remove defines for RTAS "IO Page Size"
ath is far from clear.
>
On hotplug, HPT is resized-up before adding LMBs.
On hotunplug, HPT is resized-down after removing LMBs.
And each one has it's own mechanism to batch HPT resizes...
I can't understand exactly how using it on hotplug fail path can be any
different than using it on hotunplug.
>
Can you please help me understanding this?
Best regards,
Leonardo Bras
Em sex., 9 de abr. de 2021 01:36, Alexey Kardashevskiy
escreveu:
>
>
> On 08/04/2021 19:04, Michael Ellerman wrote:
> > Alexey Kardashevskiy writes:
> >> On 08/04/2021 15:37, Michael Ellerman wrote:
> >>> Leonardo Bras writes:
> >>>> According
resize to the right size for the full add,
> then resize several times again as we perform the add? Or.. I guess
> that will be suppressed by patch 1/3.
Correct.
> That's seems kinda fragile, though.
What do you mean by fragile here?
What would you suggest doing different?
Best regards,
Leonardo Bras
) and so on.
>
> OTOH the PAPR page sizes need macros as they are the ones which are
> weird and screaming for macros.
>
> I'd steal/rework spapr_page_mask_to_query_mask() from QEMU. Thanks,
>
Thanks for this feedback!
I just sent a v2 applying your suggestions.
Best regards,
Leonardo Bras
Hello Michael, thank you for this feedback!
Comments inline:
On Thu, 2021-04-08 at 15:37 +1000, Michael Ellerman wrote:
> Leonardo Bras writes:
> > According to LoPAR, ibm,query-pe-dma-window output named "IO Page Sizes"
> > will let the OS know all possible p
On Thu, 2021-04-08 at 03:20 -0300, Leonardo Bras wrote:
> > > +#define QUERY_DDW_PGSIZE_4K 0x01
> > > +#define QUERY_DDW_PGSIZE_64K 0x02
> > > +#define QUERY_DDW_PGSIZE_16M 0x04
> > > +#define QUERY_DDW_PGSIZE_32M 0x08
> > > +#define
On Wed, 2020-09-30 at 17:29 +1000, Alexey Kardashevskiy wrote:
>
> On 30/09/2020 06:54, Leonardo Bras wrote:
> > On Tue, 2020-09-29 at 13:55 +1000, Alexey Kardashevskiy wrote:
> > >
> > > On 12/09/2020 03:07, Leonardo Bras wrote:
> > > > Cc
On Tue, 2021-04-13 at 17:18 +1000, Alexey Kardashevskiy wrote:
>
> On 13/04/2021 15:49, Leonardo Bras wrote:
> > Thanks for the feedback!
> >
> > On Tue, 2020-09-29 at 13:56 +1000, Alexey Kardashevskiy wrote:
> > > > -static bool find_existing_ddw(st
he correct parameters? Use the previous tbl
it_reserved_start and tbl->it_reserved_end is enough?
Best regards,
Leonardo Bras
>
On Tue, 2020-09-29 at 13:56 +1000, Alexey Kardashevskiy wrote:
>
> On 12/09/2020 03:07, Leonardo Bras wrote:
> > Cc: linuxppc-dev@lists.ozlabs.org, linux-ker...@vger.kernel.org,
> >
> > Update remove_dma_window() so it can be used to remove DDW with a given
> >
On Tue, 2021-04-13 at 17:41 +1000, Alexey Kardashevskiy wrote:
>
> On 13/04/2021 17:33, Leonardo Bras wrote:
> > On Tue, 2021-04-13 at 17:18 +1000, Alexey Kardashevskiy wrote:
> > >
> > > On 13/04/2021 15:49, Leonardo Bras wrote:
> > > > Thanks for the
e mental load a lot. You can add
> a comment at the single spot you use them, explaining what this is, in a
> much better way!
>
> Comments are *good*.
>
>
> Segher
Thanks for the feedback Alexey, Michael and Segher!
I have sent a v3 for this patch.
http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20210408201915.174217-1-leobra...@gmail.com/
Please let me know of your feedback in it.
Best regards,
Leonardo Bras
On Mon, 2021-04-19 at 10:44 -0500, Rob Herring wrote:
> On Fri, Apr 16, 2021 at 3:58 PM Leonardo Bras wrote:
> >
> > Hello Rob, thanks for this feedback!
> >
> > On Thu, 2021-04-15 at 13:59 -0500, Rob Herring wrote:
> > > +PPC and PCI lists
> > >
&
On Mon, 2021-04-19 at 20:39 -0500, Rob Herring wrote:
> On Mon, Apr 19, 2021 at 7:35 PM Leonardo Bras wrote:
> >
> > On Mon, 2021-04-19 at 10:44 -0500, Rob Herring wrote:
> > > On Fri, Apr 16, 2021 at 3:58 PM Leonardo Bras wrote:
> > > >
> &g
reated, being insufficient for correct
usage.
Fix this so the correct window size is used in this case.
Fixes: bf6e2d562bbc4("powerpc/dma: Fallback to dma_ops when persistent memory
present")
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 2 +-
1 file chan
On Tue, 2021-04-20 at 15:18 +1000, Alexey Kardashevskiy wrote:
>
> On 20/04/2021 14:54, Leonardo Bras wrote:
> > As of today, if the DDW is big enough to fit (1 << MAX_PHYSMEM_BITS) it's
> > possible to use direct DMA mapping even with pmem region.
> >
> > B
On Tue, 2021-04-13 at 18:24 +1000, Alexey Kardashevskiy wrote:
>
> On 13/04/2021 17:58, Leonardo Bras wrote:
> > On Tue, 2021-04-13 at 17:41 +1000, Alexey Kardashevskiy wrote:
> > >
> > > On 13/04/2021 17:33, Leonardo Bras wrote:
> > > > On Tue, 2021-
On Tue, 2021-04-20 at 17:34 -0500, Rob Herring wrote:
> > [...]
> > I think the point here is bus resources not getting the MEM_64 flag,
> > but device resources getting it correctly. Is that supposed to happen?
>
> I experimented with this on Arm with qemu and it seems fine there too.
> Looks
Hello Rob, thanks for this feedback!
On Thu, 2021-04-15 at 13:59 -0500, Rob Herring wrote:
> +PPC and PCI lists
>
> On Thu, Apr 15, 2021 at 1:01 PM Leonardo Bras wrote:
> >
> > Many other resource flag parsers already add this flag when the input
> > has bits 24 &
Hello Rob, thanks for this feedback!
On Thu, 2021-04-15 at 13:59 -0500, Rob Herring wrote:
> +PPC and PCI lists
>
> On Thu, Apr 15, 2021 at 1:01 PM Leonardo Bras wrote:
> >
> > Many other resource flag parsers already add this flag when the input
> > has bits 24 &
ay be? The less unrelated
> changes the better.
I changed all labels I added to have out__, I think
that will allow it to stay like existing labels.
Thanks for reviewing!
Leonardo Bras
On Tue, 2020-09-29 at 13:56 +1000, Alexey Kardashevskiy wrote:
>
> On 12/09/2020 03:07, Leonardo Bras wrote:
> > Cc: linuxppc-dev@lists.ozlabs.org, linux-ker...@vger.kernel.org,
> >
> > Add a new helper _iommu_table_setparms(), and use it in
Hello Alexey, thanks for the feedback!
On Tue, 2020-09-29 at 13:57 +1000, Alexey Kardashevskiy wrote:
>
> On 12/09/2020 03:07, Leonardo Bras wrote:
> > diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
> > index ffb2637dc82b..c838da3d8f32 100644
> > -
when MMU is on.
>
> Signed-off-by: Alexey Kardashevskiy
It looks a very good change, and also makes code much simpler to read.
FWIW:
Reviewed-by: Leonardo Bras
> ---
> arch/powerpc/kernel/iommu.c | 15 +++
> 1 file changed, 3 insertions(+), 12 deletions(-)
>
> diff --
iommu_init_table() did
not panic(), and pnv_pci_ioda2_set_window() returned something other
than 0, it would return rc in the if (rc) clause, but now it does not
happen anymore, going through if (!pnv_iommu_bypass_disabled) onwards.
Is that desired?
As far as I could see, returning rc there seems a good procedure after
iommu_init_table returning -ENOMEM.
Best regards,
Leonardo Bras
Hello Fabiano,
Thanks for reviewing!
(answers inline)
On Fri, 2021-02-05 at 10:09 -0300, Fabiano Rosas wrote:
> Leonardo Bras writes:
>
> > Before guest entry, TBU40 register is changed to reflect guest timebase.
> > After exitting guest, the register is reverted to i
On Mon, 2021-02-22 at 16:24 +1100, Alexey Kardashevskiy wrote:
>
> On 18/02/2021 06:32, Leonardo Bras wrote:
> > On Tue, 2021-02-16 at 14:33 +1100, Alexey Kardashevskiy wrote:
> > > Most platforms allocate IOMMU table structures (specifically it_map)
> > > at the
if direct mapping is possible. It can also allow a DMA window
starting at 0x00 to be used.
This will be helpful for using a DDW with indirect mapping, as the window
address will be different than 0x00, but it will not map the whole
partition.
Signed-off-by: Leonardo Bras
Reviewed-by: Alexey
all memory, which looks the most expensive operation, only if
everything else succeeds.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 93 --
1 file changed, 57 insertions(+), 36 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/iommu.c
b/
ore used, move iommu_table_lpar_multi_ops and
iommu_table_pseries_ops to before their respective iommu_table_setparms*().
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 100 -
1 file changed, 50 insertions(+), 50 deletions(-)
diff --git a/a
Update remove_dma_window() so it can be used to remove DDW with a given
property name.
This enables the creation of new property names for DDW, so we can
have different usage for it, like indirect mapping.
Signed-off-by: Leonardo Bras
---
arch/powerpc/platforms/pseries/iommu.c | 21
There are two functions creating direct_window_list entries in a
similar way, so create a ddw_list_new_entry() to avoid duplicity and
simplify those functions.
Signed-off-by: Leonardo Bras
Reviewed-by: Alexey Kardashevskiy
---
arch/powerpc/platforms/pseries/iommu.c | 32
renaming,
- Removed some unnecessary empty lines,
- Changed some code moving to forward declarations.
v2
Link:
http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=201210=%2A=both
On Thu, 2021-04-22 at 04:07 -0300, Leonardo Bras wrote:
> So far it's assumed possible to map the guest RA
301 - 400 of 433 matches
Mail list logo
