ails 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 tran
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), which enables si
> arch/arm64/kvm/hyp-init.S| 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 +++
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
d 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/dr
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
--- a
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
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
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 [1] and
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 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
d 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
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
--- a
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 a
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
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(-)
On Thu, Nov 20, 2014 at 3:11 PM, Antonios Motakis
wrote:
> On Wed, Nov 12, 2014 at 11:58 AM, Eric Auger wrote:
>> On 10/27/2014 07:07 PM, Antonios Motakis wrote:
>>> This patch enables the IOCTLs VFIO_DEVICE_GET_REGION_INFO ioctl call,
>>> which allows the user to lea
On Wed, Nov 12, 2014 at 3:22 PM, Eric Auger wrote:
> On 10/31/2014 08:36 PM, Alex Williamson wrote:
>> On Mon, 2014-10-27 at 19:07 +0100, Antonios Motakis wrote:
>>> This patch allows to set an eventfd for a patform device's interrupt,
> platform device (typo)
Ack.
&
On Wed, Nov 12, 2014 at 4:46 PM, Eric Auger wrote:
> On 10/27/2014 07:07 PM, Antonios Motakis wrote:
>> VFIO returns a file descriptor which we can use to manipulate the memory
>> regions of the device. Usually, the user will mmap memory regions that are
>> addressable on pag
On Wed, Nov 12, 2014 at 11:58 AM, Eric Auger wrote:
> On 10/27/2014 07:07 PM, Antonios Motakis wrote:
>> 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.
>>
>>
On Wed, Nov 12, 2014 at 5:36 PM, Alex Williamson
wrote:
> On Wed, 2014-11-12 at 11:32 +0100, Eric Auger wrote:
>> On 10/27/2014 07:07 PM, Antonios Motakis wrote:
>> > A VFIO userspace driver will start by opening the VFIO device
>> > that corresponds to an IOMMU gr
On Wed, Nov 12, 2014 at 5:49 PM, Alex Williamson
wrote:
>
> On Wed, 2014-11-12 at 11:05 +0100, Eric Auger wrote:
> > Hi Antonios,
> >
> > On 10/27/2014 07:07 PM, Antonios Motakis wrote:
> > > This patch forms the common skeleton code for platform devices support
&
On Thu, Nov 13, 2014 at 9:05 AM, Hongbo Zhang wrote:
> On 12 November 2014 17:57, Antonios Motakis
> wrote:
>> Hello Hongbo,
>>
>> On Wed, Nov 12, 2014 at 10:52 AM, Hongbo Zhang
>> wrote:
>>> On 28 October 2014 02:07, Antonios Motakis
>>> wr
Hello Hongbo,
On Wed, Nov 12, 2014 at 10:52 AM, Hongbo Zhang wrote:
> On 28 October 2014 02:07, Antonios Motakis
> wrote:
>>
>> Enable building the VFIO PLATFORM driver that allows to use Linux platform
>> devices with VFIO.
>>
>> Signed-off-by: Antonios Mota
On Fri, Oct 31, 2014 at 8:36 PM, Alex Williamson
wrote:
> On Mon, 2014-10-27 at 19:07 +0100, Antonios Motakis wrote:
>> Level sensitive interrupts are exposed as maskable and automasked
>> interrupts and are masked and disabled automatically when they fire.
>>
>> Sign
On Fri, Oct 31, 2014 at 8:36 PM, Alex Williamson
wrote:
> On Mon, 2014-10-27 at 19:07 +0100, Antonios Motakis wrote:
>> This patch allows to set an eventfd for a patform device's interrupt,
>> and also to trigger the interrupt eventfd from userspace for testing.
>> Leve
On Fri, Oct 31, 2014 at 8:43 PM, Alex Williamson
wrote:
> On Mon, 2014-10-27 at 19:08 +0100, Antonios Motakis wrote:
>> Virqfd just needs to keep accesses to any struct *virqfd safe, but this
>> comes into play only when creating or destroying eventfds, so sharing
>> the s
On Fri, Oct 31, 2014 at 8:11 PM, Alex Williamson
wrote:
> On Mon, 2014-10-27 at 19:07 +0100, Antonios Motakis wrote:
>> Return information for the interrupts exposed by the device.
>> This patch extends VFIO_DEVICE_GET_INFO with the number of IRQs
>> and enables VFI
On Fri, Oct 31, 2014 at 7:58 PM, Alex Williamson
wrote:
> On Mon, 2014-10-27 at 19:07 +0100, Antonios Motakis wrote:
>> 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
On Fri, Oct 31, 2014 at 7:40 PM, Alex Williamson
wrote:
> On Mon, 2014-10-27 at 19:07 +0100, Antonios Motakis wrote:
>> Add support for discovering AMBA devices with VFIO and handle them
>> similarly to Linux platform devices.
>>
>> Signed-off-by: Antonios Motak
On Fri, Oct 31, 2014 at 9:04 PM, Alex Williamson
wrote:
>
> On Mon, 2014-10-27 at 19:05 +0100, Antonios Motakis wrote:
> > Currently a VFIO driver's IOMMU capabilities are encoded as a series of
> > numerical defines. Replace this with an enum for future maintainability
On Mon, Oct 27, 2014 at 9:12 PM, Bjorn Helgaas wrote:
> On Mon, Oct 27, 2014 at 12:08 PM, Antonios Motakis
> wrote:
>> The virqfd_enable and virqfd_disable functions are now global. Add the
>> vfio_ prefix to those functions.
>
> Wouldn't it be better to change
On Mon, Oct 27, 2014 at 8:16 PM, Bjorn Helgaas wrote:
> Hi Antonios,
>
> On Mon, Oct 27, 2014 at 12:07 PM, Antonios Motakis
> wrote:
>> The virqfd functionality that is used by VFIO_PCI to implement interrupt
>> masking and unmasking via an eventfd, is generic enough
process.
Signed-off-by: Antonios Motakis
---
drivers/vfio/Makefile | 4 +-
drivers/vfio/pci/vfio_pci_intrs.c | 213 ---
drivers/vfio/pci/vfio_pci_private.h | 3 -
drivers/vfio/virqfd.c | 214
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
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/pci/vfio_pci.c | 8
drivers/vfio/vfio.c | 8
The virqfd_enable and virqfd_disable functions are now global. Add the
vfio_ prefix to those functions.
Signed-off-by: Antonios Motakis
---
drivers/vfio/pci/vfio_pci_intrs.c | 18 +-
drivers/vfio/virqfd.c | 14 +++---
include/linux/vfio.h | 10
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
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
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 | 102 +-
drivers/vfio/platform
Virqfd just 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 | 10
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 | 116 ++
include/uapi/linux/vfio.h | 1 +
2 files changed, 117 insertions
.
For this reason we also need allow to read and write to the memory regions
via the file descriptor. Implement this funcionality only for MMIO regions
of platform devices; PIO regions are not being handled at this point.
Signed-off-by: Antonios Motakis
---
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 | 56
-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 e0fdbc8..cb20526 100644
--- a
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 | 126 ++
drivers
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
d 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
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
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 | 114 ++
include/uapi/linux/vfio.h | 1 +
2
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
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 | 110 +-
drivers/vfio/platform
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
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
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 | 21 ++---
1 file changed, 10 insertions(+), 11 deletions(-)
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 1e39842..06d66c9 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -30,6
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
This allows to make use of the VFIO_IOMMU_TYPE1 driver with platform
devices on ARM. 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 a/drivers/vfio
On Wed, Oct 22, 2014 at 6:46 PM, Alex Williamson
wrote:
> On Wed, 2014-10-22 at 15:54 +0200, Antonios Motakis wrote:
>> On Tue, Oct 21, 2014 at 6:34 PM, Alex Williamson
>> wrote:
>> > On Mon, 2014-10-13 at 15:10 +0200, Antonios Motakis wrote:
>> &g
On Wed, Oct 22, 2014 at 11:08 AM, Eric Auger wrote:
> On 10/13/2014 03:09 PM, Antonios Motakis wrote:
>> VFIO_IOMMU_TYPE1 keeps track for each domain it knows a list of protection
>> flags it always applies to all mappings in the domain. This is used for
>>
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