rd. The user always needs to handle the interrupt as level
> since the bypass can be torn down at any point in time. We're taking
> advantage of the in-kernel path to make further optimizations, which
> seems like they should be transparent to the user. Thanks,
I wonder if it makes sense
oggle any of the interrupt info details based on the state of
> the forward. The user always needs to handle the interrupt as level
> since the bypass can be torn down at any point in time. We're taking
> advantage of the in-kernel path to make further optimizations, which
> seems like they should be transparent to the user. T
On 26-Aug-15 11:59, Marc Zyngier wrote:
> On 26/08/15 10:21, Jan Kiszka wrote:
>> On 2015-08-26 11:12, Antonios Motakis wrote:
>>> Hello Marc,
>>>
>>> On 08-Jul-15 18:19, Marc Zyngier wrote:
>>>> ARMv8.1 comes with the "Virtualization Host Ex
On 26-Aug-15 11:21, Jan Kiszka wrote:
> On 2015-08-26 11:12, Antonios Motakis wrote:
>> Hello Marc,
>>
>> On 08-Jul-15 18:19, Marc Zyngier wrote:
>>> ARMv8.1 comes with the "Virtualization Host Extension" (VHE for
>>> short), wh
| 9 +-
> arch/arm64/kvm/hyp.S | 363
> ---
> arch/arm64/kvm/vgic-v2-switch.S | 19 +-
> arch/arm64/kvm/vgic-v3-switch.S | 33 ++--
> arch/arm64/kvm/vhe-macros.h | 54 ++
> drivers/clocksource/arm_a
++
drivers/clocksource/arm_arch_timer.c | 96 +
18 files changed, 638 insertions(+), 229 deletions(-)
create mode 100644 arch/arm64/kvm/vhe-macros.h
--
Antonios Motakis
Virtualization Engineer
Huawei Technologies Duesseldorf GmbH
European Research Center
Riesstrasse 25, 80992
On 26-Aug-15 11:59, Marc Zyngier wrote:
On 26/08/15 10:21, Jan Kiszka wrote:
On 2015-08-26 11:12, Antonios Motakis wrote:
Hello Marc,
On 08-Jul-15 18:19, Marc Zyngier wrote:
ARMv8.1 comes with the Virtualization Host Extension (VHE for
short), which enables simpler support of Type-2
On 26-Aug-15 11:21, Jan Kiszka wrote:
On 2015-08-26 11:12, Antonios Motakis wrote:
Hello Marc,
On 08-Jul-15 18:19, Marc Zyngier wrote:
ARMv8.1 comes with the Virtualization Host Extension (VHE for
short), which enables simpler support of Type-2 hypervisors.
This extension allows
VFIO_PCI passes the VFIO device structure *vdev via eventfd to the handler
that implements masking/unmasking of IRQs via an eventfd. We can replace
it in the virqfd infrastructure with an opaque type so we can make use
of the mechanism from other VFIO bus drivers.
Signed-off-by: Antonios Motakis
With this patch the VFIO user will be able to set an eventfd that can be
used in order to mask and unmask IRQs of platform devices.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_irq.c | 47 ---
drivers/vfio/platform/vfio_platform_private.h
.
For this reason we also allow to use read and write functions to the file
descriptor pointing to the memory regions.
We implement this functionality only for MMIO regions of platform devices;
PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis
---
drivers/vfio
The Virqfd code needs to keep accesses to any struct *virqfd safe, but
this comes into play only when creating or destroying eventfds, so sharing
the same spinlock with the VFIO bus driver is not necessary.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci/vfio_pci_intrs.c | 31
Now we have finally completely decoupled virqfd from VFIO_PCI. We can
initialize it from the VFIO generic code, in order to safely use it from
multiple independent VFIO bus drivers.
Signed-off-by: Antonios Motakis
---
drivers/vfio/Makefile | 4 +++-
drivers/vfio/pci/Makefile | 3
We want to reuse virqfd functionality in multiple VFIO drivers; before
moving these functions to core VFIO, add the vfio_ prefix to the
virqfd_enable and virqfd_disable functions, and export them so they can
be used from other modules.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci
and are implemented here using a simple and efficient IRQ handler.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_irq.c | 102 +-
drivers/vfio/platform/vfio_platform_private.h | 2 +
2 files changed, 102 insertions(+), 2 deletions(-)
diff --git a/drivers
The virqfd functionality that is used by VFIO_PCI to implement interrupt
masking and unmasking via an eventfd, is generic enough and can be reused
by another driver. Move it to a separate file in order to allow the code
to be shared.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci/Makefile
The functions vfio_pci_virqfd_init and vfio_pci_virqfd_exit are not really
PCI specific, since we plan to reuse the virqfd code with more VFIO drivers
in addition to VFIO_PCI.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci/vfio_pci.c | 6 +++---
drivers/vfio/pci/vfio_pci_intrs.c | 4
Level sensitive interrupts are exposed as maskable and automasked
interrupts and are masked and disabled automatically when they fire.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_irq.c | 99 ++-
drivers/vfio/platform
This patch is a skeleton for the VFIO_DEVICE_SET_IRQS IOCTL, around which
most IRQ functionality is implemented in VFIO.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 52 +--
drivers/vfio/platform/vfio_platform_irq.c | 59
Return information for the interrupts exposed by the device.
This patch extends VFIO_DEVICE_GET_INFO with the number of IRQs
and enables VFIO_DEVICE_GET_IRQ_INFO.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/Makefile| 2 +-
drivers/vfio/platform
Add support for discovering AMBA devices with VFIO and handle them
similarly to Linux platform devices.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_amba.c | 115 ++
include/uapi/linux/vfio.h | 1 +
2 files changed, 116 insertions
This patch enables the IOCTLs VFIO_DEVICE_GET_REGION_INFO ioctl call,
which allows the user to learn about the available MMIO resources of
a device.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 106 +-
drivers/vfio/platform
-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 23 ---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/vfio/platform/vfio_platform_common.c
b/drivers/vfio/platform/vfio_platform_common.c
index 34d023b..862b43b 100644
Allow to memory map the MMIO regions of the device so userspace can
directly access them. PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 65
1 file changed, 65 insertions(+)
diff
Enable building the VFIO AMBA driver. VFIO_AMBA depends on VFIO_PLATFORM,
since it is sharing a portion of the code, and it is essentially implemented
as a platform device whose resources are discovered via AMBA specific APIs
in the kernel.
Signed-off-by: Antonios Motakis
---
drivers/vfio
Enable building the VFIO PLATFORM driver that allows to use Linux platform
devices with VFIO.
Signed-off-by: Antonios Motakis
---
drivers/vfio/Kconfig | 1 +
drivers/vfio/Makefile | 1 +
drivers/vfio/platform/Kconfig | 9 +
drivers/vfio/platform/Makefile | 4
4
Driver to bind to Linux platform devices, and callbacks to discover their
resources to be used by the main VFIO PLATFORM code.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform.c | 103 ++
include/uapi/linux/vfio.h | 1 +
2
will reside.
This will allow us to implement support for also discovering AMBA devices
and their resources, but still reuse a large part of the VFIO_PLATFORM
implementation.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 121 ++
drivers
will reside.
This will allow us to implement support for also discovering AMBA devices
and their resources, but still reuse a large part of the VFIO_PLATFORM
implementation.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 121
Enable building the VFIO PLATFORM driver that allows to use Linux platform
devices with VFIO.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/Kconfig | 1 +
drivers/vfio/Makefile | 1 +
drivers/vfio/platform/Kconfig | 9 +
drivers
Driver to bind to Linux platform devices, and callbacks to discover their
resources to be used by the main VFIO PLATFORM code.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform.c | 103 ++
include/uapi/linux
Allow to memory map the MMIO regions of the device so userspace can
directly access them. PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 65
1 file
Enable building the VFIO AMBA driver. VFIO_AMBA depends on VFIO_PLATFORM,
since it is sharing a portion of the code, and it is essentially implemented
as a platform device whose resources are discovered via AMBA specific APIs
in the kernel.
Signed-off-by: Antonios Motakis a.mota
This patch enables the IOCTLs VFIO_DEVICE_GET_REGION_INFO ioctl call,
which allows the user to learn about the available MMIO resources of
a device.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 106
Add support for discovering AMBA devices with VFIO and handle them
similarly to Linux platform devices.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_amba.c | 115 ++
include/uapi/linux/vfio.h | 1
The Virqfd code needs to keep accesses to any struct *virqfd safe, but
this comes into play only when creating or destroying eventfds, so sharing
the same spinlock with the VFIO bus driver is not necessary.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/pci
Now we have finally completely decoupled virqfd from VFIO_PCI. We can
initialize it from the VFIO generic code, in order to safely use it from
multiple independent VFIO bus drivers.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/Makefile | 4 +++-
drivers
We want to reuse virqfd functionality in multiple VFIO drivers; before
moving these functions to core VFIO, add the vfio_ prefix to the
virqfd_enable and virqfd_disable functions, and export them so they can
be used from other modules.
Signed-off-by: Antonios Motakis a.mota
and are implemented here using a simple and efficient IRQ handler.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_irq.c | 102 +-
drivers/vfio/platform/vfio_platform_private.h | 2 +
2 files changed, 102 insertions(+), 2
The virqfd functionality that is used by VFIO_PCI to implement interrupt
masking and unmasking via an eventfd, is generic enough and can be reused
by another driver. Move it to a separate file in order to allow the code
to be shared.
Signed-off-by: Antonios Motakis a.mota
Level sensitive interrupts are exposed as maskable and automasked
interrupts and are masked and disabled automatically when they fire.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_irq.c | 99 ++-
drivers/vfio
This patch is a skeleton for the VFIO_DEVICE_SET_IRQS IOCTL, around which
most IRQ functionality is implemented in VFIO.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 52 +--
drivers/vfio/platform
Return information for the interrupts exposed by the device.
This patch extends VFIO_DEVICE_GET_INFO with the number of IRQs
and enables VFIO_DEVICE_GET_IRQ_INFO.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/Makefile| 2 +-
drivers
-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 23 ---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/vfio/platform/vfio_platform_common.c
b/drivers/vfio/platform/vfio_platform_common.c
index
The functions vfio_pci_virqfd_init and vfio_pci_virqfd_exit are not really
PCI specific, since we plan to reuse the virqfd code with more VFIO drivers
in addition to VFIO_PCI.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/pci/vfio_pci.c | 6
.
For this reason we also allow to use read and write functions to the file
descriptor pointing to the memory regions.
We implement this functionality only for MMIO regions of platform devices;
PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis a.mota
With this patch the VFIO user will be able to set an eventfd that can be
used in order to mask and unmask IRQs of platform devices.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_irq.c | 47 ---
drivers/vfio
VFIO_PCI passes the VFIO device structure *vdev via eventfd to the handler
that implements masking/unmasking of IRQs via an eventfd. We can replace
it in the virqfd infrastructure with an opaque type so we can make use
of the mechanism from other VFIO bus drivers.
Signed-off-by: Antonios Motakis
Certain properties of a device are accessible as an array of unsigned
integers, either u64, u32, u16, or u8. Let the VFIO user query this
type of device properties.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/properties.c | 62 +-
1 file changed
VFIO_DEVICE_GET_DEV_PROPERTY.
The user needs to know the name and the data type of the property he is
accessing.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/Makefile| 3 +-
drivers/vfio/platform/properties.c| 61 +++
drivers/vfio/platform
Certain device properties (e.g. the device node name, the compatible
string), are available as a list of strings (separated by the null
terminating character). Let the VFIO user query this type of properties.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/properties.c | 43
Certain properties of a device are accessible as an array of unsigned
integers, either u64, u32, u16, or u8. Let the VFIO user query this
type of device properties.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/properties.c | 62
VFIO_DEVICE_GET_DEV_PROPERTY.
The user needs to know the name and the data type of the property he is
accessing.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/Makefile| 3 +-
drivers/vfio/platform/properties.c| 61
Certain device properties (e.g. the device node name, the compatible
string), are available as a list of strings (separated by the null
terminating character). Let the VFIO user query this type of properties.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio
Dear Russel,
Do you think this patch can be included eventually?
If not, what would we still need to change, or is there another
approach you would accept?
Thanks and best regards,
Antonios
On Thu, Nov 27, 2014 at 6:25 PM, Antonios Motakis
wrote:
> As already demonstrated with PCI
Dear Russel,
Do you think this patch can be included eventually?
If not, what would we still need to change, or is there another
approach you would accept?
Thanks and best regards,
Antonios
On Thu, Nov 27, 2014 at 6:25 PM, Antonios Motakis
a.mota...@virtualopensystems.com wrote:
As already
Add support for discovering AMBA devices with VFIO and handle them
similarly to Linux platform devices.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_amba.c | 115 ++
include/uapi/linux/vfio.h | 1 +
2 files changed, 116 insertions
Add support for discovering AMBA devices with VFIO and handle them
similarly to Linux platform devices.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_amba.c | 115 ++
include/uapi/linux/vfio.h | 1
This patch is a skeleton for the VFIO_DEVICE_SET_IRQS IOCTL, around which
most IRQ functionality is implemented in VFIO.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 52 +--
drivers/vfio/platform/vfio_platform_irq.c | 59
Level sensitive interrupts are exposed as maskable and automasked
interrupts and are masked and disabled automatically when they fire.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_irq.c | 99 ++-
drivers/vfio/platform
We want to reuse virqfd functionality in multiple VFIO drivers; before
moving these functions to core VFIO, add the vfio_ prefix to the
virqfd_enable and virqfd_disable functions, and export them so they can
be used from other modules.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci
The functions vfio_pci_virqfd_init and vfio_pci_virqfd_exit are not really
PCI specific, since we plan to reuse the virqfd code with more VFIO drivers
in addition to VFIO_PCI.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci/vfio_pci.c | 6 +++---
drivers/vfio/pci/vfio_pci_intrs.c | 4
The Virqfd code needs to keep accesses to any struct *virqfd safe, but
this comes into play only when creating or destroying eventfds, so sharing
the same spinlock with the VFIO bus driver is not necessary.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci/vfio_pci_intrs.c | 31
VFIO_PCI passes the VFIO device structure *vdev via eventfd to the handler
that implements masking/unmasking of IRQs via an eventfd. We can replace
it in the virqfd infrastructure with an opaque type so we can make use
of the mechanism from other VFIO bus drivers.
Signed-off-by: Antonios Motakis
The virqfd functionality that is used by VFIO_PCI to implement interrupt
masking and unmasking via an eventfd, is generic enough and can be reused
by another driver. Move it to a separate file in order to allow the code
to be shared.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci/Makefile
Now we have finally completely decoupled virqfd from VFIO_PCI. We can
initialize it from the VFIO generic code, in order to safely use it from
multiple independent VFIO bus drivers.
Signed-off-by: Antonios Motakis
---
drivers/vfio/Makefile | 4 +++-
drivers/vfio/pci/Makefile | 3
With this patch the VFIO user will be able to set an eventfd that can be
used in order to mask and unmask IRQs of platform devices.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_irq.c | 47 ---
drivers/vfio/platform/vfio_platform_private.h
Return information for the interrupts exposed by the device.
This patch extends VFIO_DEVICE_GET_INFO with the number of IRQs
and enables VFIO_DEVICE_GET_IRQ_INFO.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/Makefile| 2 +-
drivers/vfio/platform
and are implemented here using a simple and efficient IRQ handler.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_irq.c | 93 ++-
drivers/vfio/platform/vfio_platform_private.h | 2 +
2 files changed, 93 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio
Add support for discovering AMBA devices with VFIO and handle them
similarly to Linux platform devices.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_amba.c | 110 ++
include/uapi/linux/vfio.h | 1 +
2 files changed, 111 insertions
.
For this reason we also allow to use read and write functions to the file
descriptor pointing to the memory regions.
We implement this functionality only for MMIO regions of platform devices;
PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis
---
drivers/vfio
This patch enables the IOCTLs VFIO_DEVICE_GET_REGION_INFO ioctl call,
which allows the user to learn about the available MMIO resources of
a device.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 106 +-
drivers/vfio/platform
Allow to memory map the MMIO regions of the device so userspace can
directly access them. PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 65
1 file changed, 65 insertions(+)
diff
-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 23 ---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/vfio/platform/vfio_platform_common.c
b/drivers/vfio/platform/vfio_platform_common.c
index 34d023b..862b43b 100644
Enable building the VFIO AMBA driver. VFIO_AMBA depends on VFIO_PLATFORM,
since it is sharing a portion of the code, and it is essentially implemented
as a platform device whose resources are discovered via AMBA specific APIs
in the kernel.
Signed-off-by: Antonios Motakis
---
drivers/vfio
Enable building the VFIO PLATFORM driver that allows to use Linux platform
devices with VFIO.
Signed-off-by: Antonios Motakis
---
drivers/vfio/Kconfig | 1 +
drivers/vfio/Makefile | 1 +
drivers/vfio/platform/Kconfig | 9 +
drivers/vfio/platform/Makefile | 4
4
Driver to bind to Linux platform devices, and callbacks to discover their
resources to be used by the main VFIO PLATFORM code.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform.c | 103 ++
include/uapi/linux/vfio.h | 1 +
2
will reside.
This will allow us to implement support for also discovering AMBA devices
and their resources, but still reuse a large part of the VFIO_PLATFORM
implementation.
Signed-off-by: Antonios Motakis
---
drivers/vfio/platform/vfio_platform_common.c | 121 ++
drivers
-pci-introduce-new-device-binding-path-using-pci_dev-driver_override.html
[2] https://www.redhat.com/archives/libvir-list/2014-April/msg00382.html
Signed-off-by: Antonios Motakis
Reviewed-by: Kim Phillips
---
Documentation/ABI/testing/sysfs-bus-amba | 20 ++
drivers/amba/bus.c
Replace the function vfio_domains_have_iommu_cache() with a more generic
function vfio_domains_have_iommu_cap() which allows to check all domains
of an vfio_iommu structure for a given cached capability.
Signed-off-by: Antonios Motakis
---
drivers/vfio/vfio_iommu_type1.c | 37
flag has been set.
The flag can be used only if all IOMMU domains behind the container support
the IOMMU_NOEXEC flag. Also, if any mappings are created with the flag, any
new domains with devices will have to support it as well.
Signed-off-by: Antonios Motakis
---
drivers/vfio/vfio_iommu_type1.c
This allows to make use of the VFIO_IOMMU_TYPE1 driver with devices
behind an IOMMU on ARM platforms. The driver can then be used with
an Exynos SMMU, or ARM SMMU driver.
Signed-off-by: Antonios Motakis
---
drivers/vfio/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
, and applying the IOMMU_CACHE protection flag when
doing the actual DMA mappings.
This will allow us to reuse the behavior for IOMMU_CAP_NOEXEC, which we
also want to keep track of, but without applying it to all domains that
support it unless the user explicitly requests it.
Signed-off-by: Antonios
of the container used.
Signed-off-by: Antonios Motakis
---
include/uapi/linux/vfio.h | 6 ++
1 file changed, 6 insertions(+)
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 59d516f..9ade02b 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -31,6
Currently a VFIO driver's IOMMU capabilities are encoded as a series of
numerical defines. Replace this with an enum for future maintainability.
Signed-off-by: Antonios Motakis
---
include/uapi/linux/vfio.h | 24 +++-
1 file changed, 11 insertions(+), 13 deletions(-)
diff
Currently a VFIO driver's IOMMU capabilities are encoded as a series of
numerical defines. Replace this with an enum for future maintainability.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
include/uapi/linux/vfio.h | 24 +++-
1 file changed, 11
of the container used.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
include/uapi/linux/vfio.h | 6 ++
1 file changed, 6 insertions(+)
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 59d516f..9ade02b 100644
--- a/include/uapi/linux/vfio.h
+++ b
flag has been set.
The flag can be used only if all IOMMU domains behind the container support
the IOMMU_NOEXEC flag. Also, if any mappings are created with the flag, any
new domains with devices will have to support it as well.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
This allows to make use of the VFIO_IOMMU_TYPE1 driver with devices
behind an IOMMU on ARM platforms. The driver can then be used with
an Exynos SMMU, or ARM SMMU driver.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/Kconfig | 2 +-
1 file changed, 1 insertion
Replace the function vfio_domains_have_iommu_cache() with a more generic
function vfio_domains_have_iommu_cap() which allows to check all domains
of an vfio_iommu structure for a given cached capability.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio
, and applying the IOMMU_CACHE protection flag when
doing the actual DMA mappings.
This will allow us to reuse the behavior for IOMMU_CAP_NOEXEC, which we
also want to keep track of, but without applying it to all domains that
support it unless the user explicitly requests it.
Signed-off-by: Antonios
-pci-introduce-new-device-binding-path-using-pci_dev-driver_override.html
[2] https://www.redhat.com/archives/libvir-list/2014-April/msg00382.html
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
Reviewed-by: Kim Phillips kim.phill...@freescale.com
---
Documentation/ABI/testing/sysfs
Driver to bind to Linux platform devices, and callbacks to discover their
resources to be used by the main VFIO PLATFORM code.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform.c | 103 ++
include/uapi/linux
will reside.
This will allow us to implement support for also discovering AMBA devices
and their resources, but still reuse a large part of the VFIO_PLATFORM
implementation.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 121
Enable building the VFIO PLATFORM driver that allows to use Linux platform
devices with VFIO.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/Kconfig | 1 +
drivers/vfio/Makefile | 1 +
drivers/vfio/platform/Kconfig | 9 +
drivers
-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 23 ---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/vfio/platform/vfio_platform_common.c
b/drivers/vfio/platform/vfio_platform_common.c
index
Enable building the VFIO AMBA driver. VFIO_AMBA depends on VFIO_PLATFORM,
since it is sharing a portion of the code, and it is essentially implemented
as a platform device whose resources are discovered via AMBA specific APIs
in the kernel.
Signed-off-by: Antonios Motakis a.mota
Add support for discovering AMBA devices with VFIO and handle them
similarly to Linux platform devices.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_amba.c | 110 ++
include/uapi/linux/vfio.h | 1
.
For this reason we also allow to use read and write functions to the file
descriptor pointing to the memory regions.
We implement this functionality only for MMIO regions of platform devices;
PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis a.mota
This patch enables the IOCTLs VFIO_DEVICE_GET_REGION_INFO ioctl call,
which allows the user to learn about the available MMIO resources of
a device.
Signed-off-by: Antonios Motakis a.mota...@virtualopensystems.com
---
drivers/vfio/platform/vfio_platform_common.c | 106
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