Hi Paolo,
On Fri, Nov 21, 2014 at 07:31:18PM +0100, Paolo Bonzini wrote:
[...]
>+ u64 feature = valid & -valid;
>+ int index = fls64(feature) - 1;
>+ void *src = get_xsave_addr(xsave, feature);
>+
>+ if (src) {
>+ u32 size, of
Hi Paolo,
On Fri, Nov 21, 2014 at 03:46:55PM +0100, Paolo Bonzini wrote:
>
>
>On 20/11/2014 17:34, Nadav Amit wrote:
>> Fenghua,
>>
>> I got KVM (v3.17) crashing on a machine that supports XRSTORS - It appears
>> to get a #GP when it is trying to load the guest FPU.
>> One reason for the #GP is t
Jan Kiszka, le Mon 17 Nov 2014 07:28:23 +0100, a écrit :
> I suppose this is a SMP host and guest? Does reducing CPUs to 1 change
> to picture?
Oddly enough, putting my host into UniProcessor mode is making L1
realmode simulation awfully slow. That also happens when binding kvm on
a single hardwa
Jan Kiszka, le Mon 17 Nov 2014 10:04:37 +0100, a écrit :
> On 2014-11-17 10:03, Samuel Thibault wrote:
> > Gleb Natapov, le Mon 17 Nov 2014 10:58:45 +0200, a écrit :
> >> Do you know how gnumach timekeeping works? Does it have a timer that fires
> >> each 1ms?
> >> Which clock device is it using?
This series proposes an integration of "ARM: Forwarding physical
interrupts to a guest VM" (http://lwn.net/Articles/603514/) in
KVM.
It enables to transform a VFIO platform driver IRQ into a forwarded
IRQ.
When a physical IRQ is forwarded (to a guest), the host does not
deactivates this latter. C
From: Kim Phillips
Used by KVM-enabled VFIO-based device passthrough support in QEMU.
Signed-off-by: Kim Phillips
---
arch/arm/kvm/Kconfig | 1 +
arch/arm/kvm/Makefile | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
index e519a
In case the IRQ is forwarded, the VFIO platform IRQ handler does not
need to disable the IRQ anymore.
When setting the IRQ handler we now also test the forwarded state. In
case the IRQ is forwarded we select the edge handler (no automaske).
Signed-off-by: Eric Auger
---
v2 -> v3:
- forwarded s
The VFIO external user API is enriched with 3 new functions that
allows a kernel user external to VFIO to retrieve some information
from a VFIO device.
- vfio_device_get_external_user enables to get a vfio device from
its fd and increments its reference counter
- vfio_device_put_external_user de
This patch introduces a new KVM_DEV_VFIO_DEVICE group.
This is a new control channel which enables KVM to cooperate with
viable VFIO devices.
Functions are introduced to check the validity of a VFIO device
file descriptor, increment/decrement the ref counter of the VFIO
device.
The patch introdu
Provide wrapper functions that allow KVM-VFIO device code to
interact with a vfio device:
- kvm_vfio_device_get_external_user gets a handle to a struct
vfio_device from the vfio device file descriptor and increments
its reference counter,
- kvm_vfio_device_put_external_user decrements the refer
This patch sets __KVM_HAVE_ARCH_KVM_VFIO_FORWARD and implements
kvm_arch_vfio_set_forward for ARM.
As a result the KVM-VFIO device now allows to forward/unforward a
VFIO device IRQ on ARM.
kvm_arch_vfio_set_forward programs both genirq and the VGIC to control
where the physical IRQ deactivation i
This patch adds and document a new KVM_DEV_VFIO_DEVICE group
and 2 device attributes: KVM_DEV_VFIO_DEVICE_FORWARD_IRQ,
KVM_DEV_VFIO_DEVICE_UNFORWARD_IRQ. The purpose is to be able
to set a VFIO device IRQ as forwarded or not forwarded.
the command takes as argument a handle to a new struct named
kv
Used by KVM-enabled VFIO-based device passthrough support in QEMU.
Signed-off-by: Joel Schopp
Signed-off-by: Eric Auger
---
Extracted from [RFC PATCH] arm64: KVM: add irqfd support
http://www.spinics.net/lists/kvm-arm/msg10798.html
---
arch/arm64/kvm/Kconfig | 1 +
arch/arm64/kvm/Makefile |
This series applies on top of "ARM: Forwarding physical
interrupts to a guest VM" (http://lwn.net/Articles/603514/)
series.
It brings some extra functionalities that were requested to
be able to inject virtual level sensitive IRQs triggered from
VFIO/irqfd.
It adds:
- a specific handling of forwa
Add a lock related to the rb tree manipulation. The rb tree can be
searched in one thread (irqfd handler for instance) and map/unmap
may happen in another.
Signed-off-by: Eric Auger
---
v2 -> v3:
re-arrange lock sequence in vgic_map_phys_irq
---
include/kvm/arm_vgic.h | 1 +
virt/kvm/arm/vgic
When the VGIC is destroyed it must take care of
- restoring the forwarded IRQs in non forwarded state,
- deactivating the IRQ in case the guest left without doing it
- cleaning nodes of the phys_map rbtree
Signed-off-by: Eric Auger
---
virt/kvm/arm/vgic.c | 36 +++
Fix multiple injection of level sensitive forwarded IRQs.
With current code, the second injection fails since the state bitmaps
are not reset (process_maintenance is not called anymore).
New implementation follows those principles:
- A forwarded IRQ only can be sampled when it is pending
- when qu
This patch handles the case where irqfd attempts to inject
a forwarded IRQ before the vgic is ready to accept it. We
cannot simply return pretending nothing happened since the IRQ
will never be deactivated by the guest. Indeed, the corresponding
virtual IRQ cannot be injected into the guest and the
CONFIG_HAVE_KVM_IRQCHIP is needed to support IRQ routing (along
with irq_comm.c and irqchip.c usage). This is not the case for
arm/arm64 currently.
This patch unsets the flag for both arm and arm64.
Signed-off-by: Eric Auger
---
arch/arm/kvm/Kconfig | 2 --
arch/arm64/kvm/Kconfig | 1 -
2 fil
From: Joel Schopp
This patch enables irqfd for arm64.
Signed-off-by: Joel Schopp
Signed-off-by: Eric Auger
---
[Eric Auger]
- originates from Joel's [RFC PATCH] arm64: KVM: add irqfd support
http://www.spinics.net/lists/kvm-arm/msg10798.html
- isolates modifications really related to irqfd
This patch enables irqfd on arm.
Both irqfd and resamplefd are supported. Injection is implemented
in vgic.c without routing.
This patch enables CONFIG_HAVE_KVM_EVENTFD and CONFIG_HAVE_KVM_IRQFD.
KVM_CAP_IRQFD is now advertised. KVM_CAP_IRQFD_RESAMPLE capability
automatically is advertised as so
This patch series enables irqfd on arm and arm64.
Irqfd framework enables to inject a virtual IRQ into a guest upon an
eventfd trigger. User-side uses KVM_IRQFD VM ioctl to provide KVM with
a kvm_irqfd struct that associates a VM, an eventfd, a virtual IRQ number
(aka. the gsi). When an actor sign
From: Igor Mammedov
introduce memory_region_get_alignment() that returns
underlying memory block alignment or 0 if it's not
relevant/implemented for backend.
Signed-off-by: Igor Mammedov
Reviewed-by: Michael S. Tsirkin
Signed-off-by: Michael S. Tsirkin
---
include/exec/exec-all.h | 2 +-
inc
From: Igor Mammedov
When more memory devices are used than available
KVM memory slots, QEMU crashes with:
kvm_alloc_slot: no free slot available
Aborted (core dumped)
Fix this by checking that KVM has a free slot before
attempting to map memory in guest address space.
Signed-off-by: Igor Mamme
On 11/23/14, 4:31 PM, Nadav Amit wrote:
On Nov 23, 2014, at 10:24, Wanpeng Li wrote:
Hi Nadav,
On 11/23/14, 4:16 PM, Nadav Amit wrote:
I’ll try to check it tomorrow (I don’t have access to the failing machine at
the moment).
If the machine you mentioned support xsaves and what's machine you
> On Nov 23, 2014, at 10:24, Wanpeng Li wrote:
>
> Hi Nadav,
> On 11/23/14, 4:16 PM, Nadav Amit wrote:
>> I’ll try to check it tomorrow (I don’t have access to the failing machine at
>> the moment).
>
> If the machine you mentioned support xsaves and what's machine you are using?
It supports
Hi Nadav,
On 11/23/14, 4:16 PM, Nadav Amit wrote:
I’ll try to check it tomorrow (I don’t have access to the failing machine at
the moment).
If the machine you mentioned support xsaves and what's machine you are
using?
Regards,
Wanpeng Li
Thanks for the quick response.
Nadav
On Nov 21,
I’ll try to check it tomorrow (I don’t have access to the failing machine at
the moment).
Thanks for the quick response.
Nadav
> On Nov 21, 2014, at 20:31, Paolo Bonzini wrote:
>
> The first patch ensures that XSAVES is not exposed in the guest until
> we emulate MSR_IA32_XSS. The second exp
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