On 12/08/2015 04:27 PM, David Gibson wrote:
On Tue, Sep 15, 2015 at 08:49:37PM +1000, Alexey Kardashevskiy wrote:
Upcoming multi-tce support (H_PUT_TCE_INDIRECT/H_STUFF_TCE hypercalls)
will validate TCE (not to have unexpected bits) and IO address
(to be within the DMA window boundaries
On 12/08/2015 04:48 PM, David Gibson wrote:
On Tue, Sep 15, 2015 at 08:49:39PM +1000, Alexey Kardashevskiy wrote:
This adds real and virtual mode handlers for the H_PUT_TCE_INDIRECT and
H_STUFF_TCE hypercalls for user space emulated devices such as IBMVIO
devices or emulated PCI. These calls
On 11/30/2015 01:06 PM, Paul Mackerras wrote:
On Tue, Sep 15, 2015 at 08:49:35PM +1000, Alexey Kardashevskiy wrote:
At the moment pages used for TCE tables (in addition to pages addressed
by TCEs) are not counted in locked_vm counter so a malicious userspace
tool can call ioctl
and PR-syle KVM are supported.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
Documentation/virtual/kvm/api.txt | 25 ++
arch/powerpc/include/asm/kvm_ppc.h | 12 +++
arch/powerpc/kvm/book3s_64_vio.c| 111 +++-
arch/power
-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
arch/powerpc/include/asm/kvm_host.h | 1 +
arch/powerpc/kvm/book3s.c | 2 +-
arch/powerpc/kvm/book3s_64_vio.c| 20 +++-
3 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/arch/powerpc/inclu
.
This counts the number of pages required for a table plus pages for
the kvmppc_spapr_tce_table struct (TCE table descriptor) itself.
This does not change the amount of (de)allocated memory.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
arch/powerpc/kvm/book3s_64_vio.
SPAPR_TCE_SHIFT is used in few places only and since IOMMU_PAGE_SHIFT_4K
can be easily used instead, remove SPAPR_TCE_SHIFT.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
arch/powerpc/include/asm/kvm_book3s_64.h | 2 --
arch/powerpc/kvm/book3s_64_vio.c | 3 ++-
arch/p
The KVM_SMI capability is following the KVM_S390_SET_IRQ_STATE capability
which is "4.95", this changes the number of the KVM_SMI chapter to 4.96.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
Documentation/virtual/kvm/api.txt | 2 +-
1 file changed, 1 insertio
modes are supported.
This does not affect VFIO, this support is coming next.
Please comment. Thanks.
Alexey Kardashevskiy (9):
rcu: Define notrace version of list_for_each_entry_rcu
KVM: PPC: Make real_vmalloc_addr() public
KVM: PPC: Rework H_PUT_TCE/H_GET_TCE handlers
KVM: PPC: Use RCU
it to the powerpc code as
it does not do anything special for KVM.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
arch/powerpc/include/asm/mmu-hash64.h | 3 +++
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 17 -
arch/powerpc/mm/hash_utils_64.c | 17 +
3
This defines list_for_each_entry_rcu_notrace and list_entry_rcu_notrace
which use rcu_dereference_raw_notrace instead of rcu_dereference_raw.
This allows using list_for_each_entry_rcu_notrace in real mode (MMU is off).
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
include
is added)
so no change in behaviour is expected.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
arch/powerpc/kvm/book3s_64_vio_hv.c | 102 +++-
1 file changed, 66 insertions(+), 36 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c
b/arch/p
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 10/04/2014 07:05 AM, Alexander Graf wrote:
Am 03.10.2014 um 14:05 schrieb Paul Mackerras pau...@samba.org:
On Thu, Oct 02, 2014 at 07:06:40PM +0200, Alexander Graf wrote:
I think we're best off to keep the user space API native endian.
On 08/14/2014 11:40 PM, Alexander Graf wrote:
On 14.08.14 07:13, Aneesh Kumar K.V wrote:
Alexey Kardashevskiy a...@ozlabs.ru writes:
fc95ca7284bc54953165cba76c3228bd2cdb9591 claims that there is no
functional change but this is not true as it calls get_order() (which
takes bytes) where
).
Suggested-by: Paul Mackerras pau...@samba.org
Cc: Alexander Graf ag...@suse.de
Cc: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
Cc: Joonsoo Kim iamjoonsoo@lge.com
Cc: Benjamin Herrenschmidt b...@kernel.crashing.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v2:
* s
...@samba.org
Cc: Alexander Graf ag...@suse.de
Cc: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
Cc: Joonsoo Kim iamjoonsoo@lge.com
Cc: Benjamin Herrenschmidt b...@kernel.crashing.org
Cc: sta...@vger.kernel.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/kvm
On 06/26/2014 07:12 AM, Alexander Graf wrote:
On 06.06.14 02:20, Alexey Kardashevskiy wrote:
On 06/05/2014 09:57 PM, Alexander Graf wrote:
On 05.06.14 09:25, Alexey Kardashevskiy wrote:
This reserves 2 capability numbers.
This implements an extended version of KVM_CREATE_SPAPR_TCE_64 ioctl
This reserves 2 capability numbers.
This implements an extended version of KVM_CREATE_SPAPR_TCE_64 ioctl.
Please advise how to proceed with these patches as I suspect that
first two should go via Paolo's tree while the last one via Alex Graf's tree
(correct?).
Thanks!
Alexey Kardashevskiy (3
(DDW), let's add
@bus_offset and @page_shift which are also required by DDW.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Documentation/virtual/kvm/api.txt | 46 +
arch/powerpc/include/asm/kvm_host.h | 4 +++-
arch/powerpc/include/asm/kvm_ppc.h
This adds a capability number for 64-bit TCE tables support.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
include/uapi/linux/kvm.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 944cd21..e6972bf 100644
--- a/include/uapi
the KVM_CREATE_SPAPR_TCE KVM ioctl because in that case TCE requests
will not be passed to the user space which is desired action in
the situation like that.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
include/uapi/linux/kvm.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/uapi
On 06/05/2014 05:38 PM, Benjamin Herrenschmidt wrote:
On Thu, 2014-06-05 at 17:25 +1000, Alexey Kardashevskiy wrote:
+This creates a virtual TCE (translation control entry) table, which
+is an IOMMU for PAPR-style virtual I/O. It is used to translate
+logical addresses used in virtual I/O
On 06/05/2014 10:30 PM, Benjamin Herrenschmidt wrote:
On Thu, 2014-06-05 at 13:56 +0200, Alexander Graf wrote:
What if we ask user space to give us a pointer to user space allocated
memory along with the TCE registration? We would still ask user space to
only use the returned fd for TCE
On 06/05/2014 09:57 PM, Alexander Graf wrote:
On 05.06.14 09:25, Alexey Kardashevskiy wrote:
This reserves 2 capability numbers.
This implements an extended version of KVM_CREATE_SPAPR_TCE_64 ioctl.
Please advise how to proceed with these patches as I suspect that
first two should go via
On 02/22/2014 06:23 AM, Benjamin Herrenschmidt wrote:
On Fri, 2014-02-21 at 16:31 +0100, Laurent Dufour wrote:
This fix introduces the H_GET_TCE hypervisor call which is basically the
reverse of H_PUT_TCE, as defined in the Power Architecture Platform
Requirements (PAPR).
The hcall H_GET_TCE
On 02/07/2014 04:39 AM, Alexander Graf wrote:
On 06.02.2014, at 17:36, Greg Kurz gk...@linux.vnet.ibm.com wrote:
As discussed in this thread:
http://patchwork.ozlabs.org/patch/309166/
We need some consistency in the way we check whether the guest
should resume or not because:
- new
On 11/16/2013 05:46 PM, Paul Mackerras wrote:
This fixes a bug in kvmppc_do_h_enter() where the physical address
for a page can be calculated incorrectly if transparent huge pages
(THP) are active. Until THP came along, it was true that if we
encountered a large (16M) page in
uses kvm_vfio_find_group_by_liobn() once per KVM run and caches
the result in kvm_arch. iommu_group_put() for all groups will be called
when KVM finishes (in the SPAPR TCE in KVM enablement patch).
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v4:
* fixed few bugs
* changed
On 11/21/2013 07:57 AM, Alex Williamson wrote:
On Wed, 2013-11-20 at 16:18 +1100, Alexey Kardashevskiy wrote:
In addition to the external VFIO user API, a VFIO KVM device
has been introduced recently.
sPAPR TCE IOMMU is para-virtualized and the guest does map/unmap
via hypercalls which take
uses kvm_vfio_find_group_by_liobn() once per KVM run and caches
the result in kvm_arch. iommu_group_put() for all groups will be called
when KVM finishes (in the SPAPR TCE in KVM enablement patch).
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v3:
* total rework
* added a release
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v2:
* it does not try to introduce a realmode search function.
Instead, liobn-to-iommu-group lookup is done by VFIO KVM device
in virtual mode and the result (iommu_group pointer) is cached
in kvm_arch so the realmode handlers do
but it works.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/kvm/Kconfig | 1 +
arch/powerpc/kvm/Makefile | 4
include/linux/kvm_host.h | 8 ---
include/linux/vfio.h | 3 +++
include/uapi/linux/kvm.h | 1 +
virt/kvm/vfio.c | 46
On 05.10.2013 2:05, Alex Williamson wrote:
On Fri, 2013-10-04 at 22:24 +1000, Alexey Kardashevskiy wrote:
This is a very rough change set required for ppc64 to use this KVM device.
vfio_rm.c is a piece of code which is going to be called from the realmode
(MMU off),
and I will put
On 10/05/2013 11:52 AM, Alexey Kardashevskiy wrote:
On 05.10.2013 2:05, Alex Williamson wrote:
On Fri, 2013-10-04 at 22:24 +1000, Alexey Kardashevskiy wrote:
This is a very rough change set required for ppc64 to use this KVM device.
vfio_rm.c is a piece of code which is going to be called
On 09/06/2013 04:01 PM, Gleb Natapov wrote:
On Fri, Sep 06, 2013 at 09:38:21AM +1000, Alexey Kardashevskiy wrote:
On 09/06/2013 04:10 AM, Gleb Natapov wrote:
On Wed, Sep 04, 2013 at 02:01:28AM +1000, Alexey Kardashevskiy wrote:
On 09/03/2013 08:53 PM, Gleb Natapov wrote:
On Mon, Sep 02, 2013
On 09/06/2013 04:57 PM, Gleb Natapov wrote:
On Thu, Sep 05, 2013 at 02:05:09PM +1000, Benjamin Herrenschmidt wrote:
On Tue, 2013-09-03 at 13:53 +0300, Gleb Natapov wrote:
Or supporting all IOMMU links (and leaving emulated stuff as is) in on
device is the last thing I have to do and then
between KVM and VFIO.
Tests show that this patch increases transmission speed from 220MB/s
to 750..1020MB/s on 10Gb network (Chelsea CXGB3 10Gb ethernet card).
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v10:
* all IOMMU TCE links
On 09/06/2013 04:57 PM, Gleb Natapov wrote:
On Thu, Sep 05, 2013 at 02:05:09PM +1000, Benjamin Herrenschmidt wrote:
On Tue, 2013-09-03 at 13:53 +0300, Gleb Natapov wrote:
Or supporting all IOMMU links (and leaving emulated stuff as is) in on
device is the last thing I have to do and then
On 09/06/2013 04:10 AM, Gleb Natapov wrote:
On Wed, Sep 04, 2013 at 02:01:28AM +1000, Alexey Kardashevskiy wrote:
On 09/03/2013 08:53 PM, Gleb Natapov wrote:
On Mon, Sep 02, 2013 at 01:14:29PM +1000, Alexey Kardashevskiy wrote:
On 09/01/2013 10:06 PM, Gleb Natapov wrote:
On Wed, Aug 28, 2013
On 09/03/2013 08:53 PM, Gleb Natapov wrote:
On Mon, Sep 02, 2013 at 01:14:29PM +1000, Alexey Kardashevskiy wrote:
On 09/01/2013 10:06 PM, Gleb Natapov wrote:
On Wed, Aug 28, 2013 at 06:50:41PM +1000, Alexey Kardashevskiy wrote:
This allows the host kernel to handle H_PUT_TCE
On 09/01/2013 09:27 PM, Gleb Natapov wrote:
On Wed, Aug 28, 2013 at 06:37:41PM +1000, Alexey Kardashevskiy wrote:
This reserves a capability number for upcoming support
of VFIO-IOMMU DMA operations in real mode.
This reserves a number for a new SPAPR TCE IOMMU KVM device
which is going
On 09/01/2013 10:06 PM, Gleb Natapov wrote:
On Wed, Aug 28, 2013 at 06:50:41PM +1000, Alexey Kardashevskiy wrote:
This allows the host kernel to handle H_PUT_TCE, H_PUT_TCE_INDIRECT
and H_STUFF_TCE requests targeted an IOMMU TCE table without passing
them to user space which saves time
On 08/28/2013 06:37 PM, Alexey Kardashevskiy wrote:
This accelerates VFIO DMA operations on POWER by moving them
into kernel.
This depends on VFIO external API patch which is on its way to upstream.
Changes:
v9:
* replaced the link logical bus number to IOMMU group ioctl to KVM
. iommu_tce_direction is static now as it is not called from anywhere else.
This will be used by upcoming real mode support of VFIO on POWER.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v8:
* fixed warnings from check_patch.pl
---
arch/powerpc/include/asm/iommu.h | 9 +-
arch
to be used for initialization.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v9:
* KVM ioctl is replaced with SPAPR TCE IOMMU KVM device type with
KVM_DEV_SPAPR_TCE_IOMMU_ATTR_LINKAGE attribute
2013/08/15:
* fixed mistype in comments
* fixed commit message which says what uses
instruction for TCE invalidation.
This new feature is going to be utilized by real mode support of VFIO.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v8:
* fixed check_patch.pl warnings
2013/11/07:
* added comment why stdcix cannot be used in virtual mode
2013/08/07:
* tested
successfully
in the kernel based fast path. If they can not be handled by the kernel,
they will get passed on to user space. So user space still has to have
an implementation for these despite the in kernel acceleration.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy
-foundation.org
Reviewed-by: Paul Mackerras pau...@samba.org
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07/25 (v7):
* removed realmode_put_page and added put_page_unless_one() instead.
The name has been chosen to conform the already
() and iommu_del_device() are public now.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v8:
* added the check for iommu_group!=NULL before removing device from a group
as suggested by Wei Yang weiy...@linux.vnet.ibm.com
v2:
* added a helper - set_iommu_table_base_and_group - which does
: add
hash_for_each_possible_rcu_notrace(),
Ben suggested to push it via his tree so I included it to the series.
* realmode_(get|put)_page is reworked.
More details in the individual patch comments.
Alexey Kardashevskiy (13):
KVM: PPC: POWERNV: move iommu_add_device earlier
hashtable: add
in real life and there is no
any obvious place to put it.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/kvm/book3s_hv.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 9e823ad..5f15ff7 100644
--- a/arch
between KVM and VFIO.
Tests show that this patch increases transmission speed from 220MB/s
to 750..1020MB/s on 10Gb network (Chelsea CXGB3 10Gb ethernet card).
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
v9
.
However this can change and we may want to optimize this.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07/12:
* removed multiple #ifdef IOMMU_API as IOMMU_API is always enabled
for KVM_BOOK3S_64
2013/06/27:
* list of huge pages
KVM is going to use VFIO's external API. However KVM can operate even VFIO
is not compiled or loaded so KVM is linked to VFIO dynamically.
This adds proxy functions for VFIO external API.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/kvm/book3s_64_vio.c | 49
On 08/15/2013 05:25 PM, Alexander Graf wrote:
On 15.08.2013, at 09:24, Alexander Graf wrote:
On 15.08.2013, at 09:22, Alexey Kardashevskiy wrote:
On 08/15/2013 05:16 PM, Alexander Graf wrote:
On 01.08.2013, at 06:44, Alexey Kardashevskiy wrote:
This is to reserve a capablity number
On 08/15/2013 05:43 PM, Alexander Graf wrote:
On 15.08.2013, at 09:42, Alexey Kardashevskiy wrote:
On 08/15/2013 05:25 PM, Alexander Graf wrote:
On 15.08.2013, at 09:24, Alexander Graf wrote:
On 15.08.2013, at 09:22, Alexey Kardashevskiy wrote:
On 08/15/2013 05:16 PM, Alexander Graf
hash_for_each_possible_rcu_notrace(),
Ben suggested to push it via his tree so I included it to the series.
4. realmode_(get|put)_page is reworked.
More details in the individual patch comments.
Alexey Kardashevskiy (10):
hashtable: add hash_for_each_possible_rcu_notrace()
KVM: PPC: reserve a capability number for multitce
.
However this can change and we may want to optimize this.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07/12:
* removed multiple #ifdef IOMMU_API as IOMMU_API is always enabled
for KVM_BOOK3S_64
2013/06/27:
* list of huge pages
-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07/11:
* removed multiple #ifdef IOMMU_API as IOMMU_API is always enabled
for KVM_BOOK3S_64
* kvmppc_gpa_to_hva_and_get also returns host phys address. Not much sense
for this here but the next
*. With those
ifdef's we could have only user space emulated devices accelerated
(but not VFIO) which do not seem to be very useful.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/kvm/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/kvm/Kconfig b/arch
. iommu_tce_direction is static now as it is not called from anywhere else.
This will be used by upcoming real mode support of VFIO on POWER.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/include/asm/iommu.h | 9 +-
arch/powerpc/kernel/iommu.c | 198
instruction for TCE invalidation.
This new feature is going to be utilized by real mode support of VFIO.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/11/07:
* added comment why stdcix cannot be used in virtual mode
2013/08/07:
* tested on p7ioc and fixed a bug with realmode
successfully
in the kernel based fast path. If they can not be handled by the kernel,
they will get passed on to user space. So user space still has to have
an implementation for these despite the in kernel acceleration.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy
This is to reserve a capablity number for upcoming support
of H_PUT_TCE_INDIRECT and H_STUFF_TCE pseries hypercalls
which support mulptiple DMA map/unmap operations per one call.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07/16:
* changed the number
Signed-off
This is to reserve a capablity number for upcoming support
of VFIO-IOMMU DMA operations in real mode.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07/16:
* changed the number
2013/07/11:
* changed order in a file, added comment about a gap in ioctl number
Signed-off
This adds hash_for_each_possible_rcu_notrace() which is basically
a notrace clone of hash_for_each_possible_rcu() which cannot be
used in real mode due to its tracing/debugging capability.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
include/linux/hashtable.h | 15 +++
1
-foundation.org
Reviewed-by: Paul Mackerras pau...@samba.org
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07/25 (v7):
* removed realmode_put_page and added put_page_unless_one() instead.
The name has been chosen to conform the already
On 07/23/2013 12:23 PM, Alex Williamson wrote:
On Tue, 2013-07-16 at 10:53 +1000, Alexey Kardashevskiy wrote:
VFIO is designed to be used via ioctls on file descriptors
returned by VFIO.
However in some situations support for an external user is required.
The first user is KVM on PPC64
Ping, anyone, please?
Ben needs ack from any of MM people before proceeding with this patch. Thanks!
On 07/16/2013 10:53 AM, Alexey Kardashevskiy wrote:
The current VFIO-on-POWER implementation supports only user mode
driven mapping, i.e. QEMU is sending requests to map/unmap pages.
However
On 07/16/2013 10:53 AM, Alexey Kardashevskiy wrote:
The changes are:
1. rebased on v3.11-rc1 so the capability numbers changed again
2. fixed multiple comments from maintainers
3. KVM: PPC: Add support for IOMMU in-kernel handling is split into
2 patches, the new one is powerpc/iommu: rework
. iommu_tce_direction is static now as it is not called from anywhere else.
This will be used by upcoming real mode support of VFIO on POWER.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/include/asm/iommu.h | 9 +-
arch/powerpc/kernel/iommu.c | 197
On 07/10/2013 03:32 AM, Alexander Graf wrote:
On 07/06/2013 05:07 PM, Alexey Kardashevskiy wrote:
This adds special support for huge pages (16MB). The reference
counting cannot be easily done for such pages in real mode (when
MMU is off) so we added a list of huge pages. It is populated
On 07/11/2013 10:51 PM, Alexander Graf wrote:
On 11.07.2013, at 14:39, Benjamin Herrenschmidt wrote:
On Thu, 2013-07-11 at 13:15 +0200, Alexander Graf wrote:
And that's bad. Jeez, seriously. Don't argue this case. We enable new
features individually unless we're 100% sure we can keep
On 07/11/2013 10:58 PM, Benjamin Herrenschmidt wrote:
On Thu, 2013-07-11 at 14:51 +0200, Alexander Graf wrote:
I don't like bloat usually. But Alexey even had an #ifdef DEBUG in
there to selectively disable in-kernel handling of multi-TCE. Not
calling ENABLE_CAP would give him exactly that
On 07/11/2013 11:41 PM, chandrashekar shastri wrote:
Hi All,
I complied the latest kernel 3.10.0+ pulled from the git on top of
3.10.0-rc5+ by enabling the new Virtualiztaion features. The compliation
was sucessfull, when I rebooted the machine it fails to boot with error as
systemd [1] :
On 07/10/2013 08:27 PM, Alexander Graf wrote:
On 10.07.2013, at 01:35, Alexey Kardashevskiy wrote:
On 07/10/2013 01:35 AM, Alexander Graf wrote:
On 06/27/2013 07:02 AM, Alexey Kardashevskiy wrote:
Signed-off-by: Alexey Kardashevskiya...@ozlabs.ru
---
include/uapi/linux/kvm.h |2
On 07/10/2013 08:05 PM, Alexander Graf wrote:
On 10.07.2013, at 07:00, Alexey Kardashevskiy wrote:
On 07/10/2013 03:02 AM, Alexander Graf wrote:
On 07/06/2013 05:07 PM, Alexey Kardashevskiy wrote:
This adds real mode handlers for the H_PUT_TCE_INDIRECT and
H_STUFF_TCE hypercalls for QEMU
On 07/10/2013 03:32 AM, Alexander Graf wrote:
On 07/06/2013 05:07 PM, Alexey Kardashevskiy wrote:
This adds special support for huge pages (16MB). The reference
counting cannot be easily done for such pages in real mode (when
MMU is off) so we added a list of huge pages. It is populated
On 07/10/2013 01:35 AM, Alexander Graf wrote:
On 06/27/2013 07:02 AM, Alexey Kardashevskiy wrote:
Signed-off-by: Alexey Kardashevskiya...@ozlabs.ru
---
include/uapi/linux/kvm.h |2 ++
1 file changed, 2 insertions(+)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
On 07/10/2013 03:02 AM, Alexander Graf wrote:
On 07/06/2013 05:07 PM, Alexey Kardashevskiy wrote:
This adds real mode handlers for the H_PUT_TCE_INDIRECT and
H_STUFF_TCE hypercalls for QEMU emulated devices such as IBMVIO
devices or emulated PCI. These calls allow adding multiple entries
(up
On 07/09/2013 07:52 AM, Alex Williamson wrote:
On Sun, 2013-07-07 at 01:07 +1000, Alexey Kardashevskiy wrote:
VFIO is designed to be used via ioctls on file descriptors
returned by VFIO.
However in some situations support for an external user is required.
The first user is KVM on PPC64
hash_for_each_possible_rcu_notrace(),
posted earlier today.
Alexey Kardashevskiy (8):
KVM: PPC: reserve a capability number for multitce support
KVM: PPC: reserve a capability and ioctl numbers for realmode VFIO
vfio: add external user support
powerpc: Prepare to support kernel handling of IOMMU map/unmap
powerpc
-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/06/27:
* realmode_get_page() fixed to use get_page_unless_zero(). If failed,
the call will be passed from real to virtual mode and safely handled.
* added comment to PageCompound() in include
the functionality of this patch, QEMU
needs to query for this capability and set the hcall-multi-tce
hypertas property only if the capability is present, otherwise
there will be serious performance degradation.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
an iommu_group struct for later use.
4. When KVM is finished, it calls vfio_group_put_external_user() to
release the VFIO group by decrementing the container user counter.
Everything gets released.
The vfio: Limit group opens patch is also required for the consistency.
Signed-off-by: Alexey
This is to reserve a capablity number for upcoming support
of VFIO-IOMMU DMA operations in real mode.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
include/uapi/linux/kvm.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index
user API support
in VFIO is required.
Tests show that this patch increases transmission speed from 220MB/s
to 750..1020MB/s on 10Gb network (Chelsea CXGB3 10Gb ethernet card).
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/07
This is to reserve a capablity number for upcoming support
of H_PUT_TCE_INDIRECT and H_STUFF_TCE pseries hypercalls
which support mulptiple DMA map/unmap operations per one call.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
include/uapi/linux/kvm.h | 1 +
1 file changed, 1 insertion
and we may want
to optimize this.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/06/27:
* list of huge pages replaces with hashtable for better performance
* spinlock removed from real mode and only protects insertion of new
huge
instruction for TCE invalidation.
This new feature is going to be utilized by real mode support of VFIO.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
arch/powerpc/include/asm/machdep.h| 12 ++
arch/powerpc/platforms/powernv/pci-ioda.c | 26 +++--
arch
On 06/27/2013 07:42 PM, Benjamin Herrenschmidt wrote:
On Thu, 2013-06-27 at 16:59 +1000, Stephen Rothwell wrote:
+/* Allows an external user (for example, KVM) to unlock an IOMMU
group */
+static void vfio_group_del_external_user(struct file *filep)
+{
+ struct vfio_group *group =
The changes are:
1. rebased on v3.10-rc7
2. removed spinlocks from real mode
3. added security checks between KVM and VFIO
MOre details in the individual patch comments.
Alexey Kardashevskiy (8):
KVM: PPC: reserve a capability number for multitce support
KVM: PPC: reserve a capability
user API support
in VFIO is required.
Tests show that this patch increases transmission speed from 220MB/s
to 750..1020MB/s on 10Gb network (Chelsea CXGB3 10Gb ethernet card).
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/06
and we may want
to optimize this.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/06/27:
* list of huge pages replaces with hashtable for better performance
* spinlock removed from real mode and only protects insertion of new
huge
Gibson da...@gibson.dropbear.id.au
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
Changes:
2013/06/27:
* realmode_get_page() fixed to use get_page_unless_zero(). If failed,
the call will be passed from real to virtual mode and safely handled
the functionality of this patch, QEMU
needs to query for this capability and set the hcall-multi-tce
hypertas property only if the capability is present, otherwise
there will be serious performance degradation.
Signed-off-by: Paul Mackerras pau...@samba.org
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
This adds hash_for_each_possible_rcu_notrace() which is basically
a notrace clone of hash_for_each_possible_rcu() which cannot be
used in real mode due to its tracing/debugging capability.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
include/linux/hashtable.h | 15 +++
1
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
include/uapi/linux/kvm.h |1 +
1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index d88c8ee..970b1f5 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -666,6 +666,7
.
The vfio: Limit group opens patch is also required for the consistency.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
---
drivers/vfio/vfio.c | 53 +++
1 file changed, 53 insertions(+)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index
On 06/21/2013 12:55 AM, Alex Williamson wrote:
On Thu, 2013-06-20 at 18:48 +1000, Alexey Kardashevskiy wrote:
On 06/20/2013 05:47 PM, Benjamin Herrenschmidt wrote:
On Thu, 2013-06-20 at 15:28 +1000, David Gibson wrote:
Just out of curiosity - would not get_file() and fput_atomic
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