On Thu, 2023-03-09 at 11:55 -0500, Peter Xu wrote:
> On Thu, Mar 09, 2023 at 09:16:08AM +0000, David Woodhouse wrote:
> > The only IRQs that are handled fully in the kernel are events arriving
> > on some eventfd which is bound as an IRQFD to some IRQ in the KVM
> > routin
On Wed, 2023-03-08 at 18:09 -0500, Peter Xu wrote:
> On Mon, Mar 06, 2023 at 05:28:24PM +0000, David Woodhouse wrote:
> > Indeed, I don't think we care about the in-kernel I/OAPIC. I don't
> > think we care about the kernel knowing about e.g. "GSI #11" at all. We
>
On Wed, 2023-03-08 at 19:20 +, David Woodhouse wrote:
> On Wed, 2023-03-08 at 17:42 +, Alex Bennée wrote:
> > Why slightly newer rather than current release?
> >
> > Our existing Fedora guest builds cause all sorts of timeout issues
> > running under TCG and se
On Wed, 2023-03-08 at 17:42 +, Alex Bennée wrote:
>
> David Woodhouse writes:
>
> > From: David Woodhouse
> >
> > The kernel in Fedora 31 doesn't support 'xen_no_vector_callback' on
> > its command line, so add a slightly newer version as a prelude to
&
On Wed, 2023-03-08 at 17:45 +, Alex Bennée wrote:
>
> David Woodhouse writes:
>
> > From: David Woodhouse
> >
> > Exercise guests with a few different modes for interrupt delivery. In
> > particular we want to cover:
> >
> > • Xen e
From: David Woodhouse
Exercise guests with a few different modes for interrupt delivery. In
particular we want to cover:
• Xen event channel delivery via GSI to the I/O APIC
• Xen event channel delivery via GSI to the i8259 PIC
• MSIs routed to PIRQ event channels
• GSIs routed to PIRQ
From: David Woodhouse
The kernel in Fedora 31 doesn't support 'xen_no_vector_callback' on
its command line, so add a slightly newer version as a prelude to
enabling avocado tests for Xen guests.
Signed-off-by: David Woodhouse
---
tests/avocado/avocado_qemu/__init__.py | 27
pport for KVM_CAP_SPLIT_IRQCHIP"
Signed-off-by: David Woodhouse
Reviewed-by: Peter Xu
---
hw/intc/ioapic.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c
index 6364ecab1b..716ffc8bbb 100644
--- a/hw/intc/ioapic.c
+++ b/hw/intc/ioapic.c
adding support for that has been submitted
• Include the I/O APIC migration fix, so that we can use -smp 4
v1:
https://lore.kernel.org/qemu-devel/20230303125126.1269861-1-dw...@infradead.org/
https://git.infradead.org/users/dwmw2/qemu.git/shortlog/refs/heads/xenfv-test
David Woodhouse (3
On Tue, 2023-03-07 at 21:20 +0100, Philippe Mathieu-Daudé wrote:
>
> This tag only appears in the cover letter, and is missing in each patch.
> It would have been acceptable if it were in the PR tag, but
> the tag (which for some reason isn't displayed in your cover letter)
> is simply "PV back
From: David Woodhouse
This header is now only for native Xen code, not PV backends that may be
used in Xen emulation. Since the toolstack libraries may depend on the
specific version of Xen headers that they pull in (and will set the
__XEN_TOOLS__ macro to enable internal definitions
From: Paul Durrant
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/i386/kvm/xen_xenstore.c | 70 ++
1 file changed, 70 insertions(+)
diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c
index
set up, leading to the crash.
By simply moving the call to xendev_class->realize() after the initial
xenstore nodes are populated, this sorry state of affairs is avoided.
Reported-by: David Woodhouse
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/x
From: David Woodhouse
Move the existing code using libxengnttab to xen-operations.c and allow
the operations to be redirected so that we can add emulation of grant
table mapping for backend drivers.
In emulation, mapping more than one grant ref to be virtually contiguous
would be fairly
From: David Woodhouse
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
MAINTAINERS | 9 +
1 file changed, 9 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 5340de0515..640deb2895 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -443,6 +443,15 @@ F: target/i386/kvm
On Tue, 2023-03-07 at 17:57 +, Paul Durrant wrote:
> I think the series is good to go now so time to send a PR.
Done, thank you!
smime.p7s
Description: S/MIME cryptographic signature
From: David Woodhouse
XC_PAGE_SIZE comes from the actual Xen libraries, while XEN_PAGE_SIZE is
provided by QEMU itself in xen_backend_ops.h. For backends which may be
built for emulation mode, use the latter.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/block/dataplane/xen
From: Paul Durrant
Store perms as a GList of strings, check permissions.
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/i386/kvm/xen_xenstore.c | 2 +-
hw/i386/kvm/xenstore_impl.c | 259 +---
hw/i386/kvm
From: David Woodhouse
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/char/xen_console.c| 8 +++---
hw/display/xenfb.c | 20 +++---
hw/xen/xen-operations.c | 45
include/hw/xen/xen_backend_ops.h | 26
From: David Woodhouse
The previous commit introduced redirectable gnttab operations fairly
much like-for-like, with the exception of the extra arguments to the
->open() call which were always NULL/0 anyway.
This *changes* the arguments to the ->unmap() operation to include the
origin
From: David Woodhouse
This is a fairly simple implementation of a copy-on-write tree.
The node walk function starts off at the root, with 'inplace == true'.
If it ever encounters a node with a refcount greater than one (including
the root node), then that node is shared with other trees
From: David Woodhouse
Given that the whole thing supported copy on write from the beginning,
transactions end up being fairly simple. On starting a transaction, just
take a ref of the existing root; swap it back in on a successful commit.
The main tree has a transaction ID too, and we keep
From: David Woodhouse
Now that we have the redirectable Xen backend operations we can build the
PV backends even without the Xen libraries.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/9pfs/meson.build| 2 +-
hw/block/dataplane/meson.build | 2 +-
hw/block
From: David Woodhouse
The existing implementation calling into the real libxenevtchn moves to
a new file hw/xen/xen-operations.c, and is called via a function table
which in a subsequent commit will also be able to invoke the emulated
event channel support.
Signed-off-by: David Woodhouse
From: David Woodhouse
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
docs/system/i386/xen.rst | 30 +++---
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/docs/system/i386/xen.rst b/docs/system/i386/xen.rst
index a00523b492..f06765e88c
From: Paul Durrant
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
accel/xen/xen-all.c | 11 +-
hw/char/xen_console.c | 2 +-
hw/i386/kvm/xen_xenstore.c | 3 -
hw/i386/kvm/xenstore_impl.h | 8
From: David Woodhouse
This implements the basic migration support in the back end, with unit
tests that give additional confidence in the node-counting already in
the tree.
However, the existing PV back ends like xen-disk don't support migration
yet. They will reset the ring and fail
From: David Woodhouse
We provided the backend-facing evtchn functions very early on as part of
the core Xen platform support, since things like timers and xenstore need
to use them.
By what may or may not be an astonishing coincidence, those functions
just *happen* all to have exactly the right
From: David Woodhouse
This implements the basic wire protocol for the XenStore commands, punting
all the actual implementation to xs_impl_* functions which all just return
errors for now.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/i386/kvm/meson.build | 1 +
hw
.
David Woodhouse (23):
hw/xen: Add xenstore wire implementation and implementation stubs
hw/xen: Add basic XenStore tree walk and write/read/directory support
hw/xen: Implement XenStore watches
hw/xen: Implement XenStore transactions
hw/xen
From: David Woodhouse
We don't actually access the guest's page through the grant, because
this isn't real Xen, and we can just use the page we gave it in the
first place. Map the grant anyway, mostly for cosmetic purposes so it
*looks* like it's in use in the guest-visible grant table.
Signed
From: David Woodhouse
This is limited to mapping a single grant at a time, because under Xen the
pages are mapped *contiguously* into qemu's address space, and that's very
hard to do when those pages actually come from anonymous mappings in qemu
in the first place.
Eventually perhaps we can
From: David Woodhouse
Whem emulating Xen, multi-page grants are distinctly non-trivial and we
have elected not to support them for the time being. Don't advertise
them to the guest.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/block/xen-block.c | 11 ---
1 file
From: David Woodhouse
Firing watches on the nodes that still exist is relatively easy; just
walk the tree and look at the nodes with refcount of one.
Firing watches on *deleted* nodes is more fun. We add 'modified_in_tx'
and 'deleted_in_tx' flags to each node. Nodes with those flags cannot
From: David Woodhouse
This is only part of it; we will also need to get the PV back end drivers
to tear down their own mappings (or do it for them, but they kind of need
to stop using the pointers too).
Some more work on the actual PV back ends and xen-bus code is going to be
needed to really
From: David Woodhouse
Now that all the work is done to enable the PV backends to work without
actual Xen, instantiate the bus from pc_basic_device_init() for emulated
mode.
This allows us finally to launch an emulated Xen guest with PV disk.
qemu-system-x86_64 -serial mon:stdio -M q35 -cpu
From: David Woodhouse
There's no need for this to be in the Xen accel code, and as we want to
use the Xen console support with KVM-emulated Xen we'll want to have a
platform-agnostic version of it. Make it use GString to build up the
path while we're at it.
Signed-off-by: David Woodhouse
From: David Woodhouse
Starts out fairly simple: a hash table of watches based on the path.
Except there can be multiple watches on the same path, so the watch ends
up being a simple linked list, and the head of that list is in the hash
table. Which makes removal a bit of a PITA but it's not so
From: David Woodhouse
Now that we have an internal implementation of XenStore, we can populate
the xenstore_backend_ops to allow PV backends to talk to it.
Watches can't be processed with immediate callbacks because that would
call back into XenBus code recursively. Defer them to a QEMUBH
From: David Woodhouse
This implements the basic wire protocol for the XenStore commands, punting
all the actual implementation to xs_impl_* functions which all just return
errors for now.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/i386/kvm/meson.build | 1 +
hw
From: Paul Durrant
Store perms as a GList of strings, check permissions.
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/i386/kvm/xen_xenstore.c | 2 +-
hw/i386/kvm/xenstore_impl.c | 259 +---
hw/i386/kvm
From: David Woodhouse
Firing watches on the nodes that still exist is relatively easy; just
walk the tree and look at the nodes with refcount of one.
Firing watches on *deleted* nodes is more fun. We add 'modified_in_tx'
and 'deleted_in_tx' flags to each node. Nodes with those flags cannot
From: David Woodhouse
We don't actually access the guest's page through the grant, because
this isn't real Xen, and we can just use the page we gave it in the
first place. Map the grant anyway, mostly for cosmetic purposes so it
*looks* like it's in use in the guest-visible grant table.
Signed
From: David Woodhouse
The existing implementation calling into the real libxenevtchn moves to
a new file hw/xen/xen-operations.c, and is called via a function table
which in a subsequent commit will also be able to invoke the emulated
event channel support.
Signed-off-by: David Woodhouse
From: David Woodhouse
Now that we have an internal implementation of XenStore, we can populate
the xenstore_backend_ops to allow PV backends to talk to it.
Watches can't be processed with immediate callbacks because that would
call back into XenBus code recursively. Defer them to a QEMUBH
From: David Woodhouse
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
MAINTAINERS | 9 +
1 file changed, 9 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 5340de0515..640deb2895 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -443,6 +443,15 @@ F: target/i386/kvm
From: David Woodhouse
This implements the basic migration support in the back end, with unit
tests that give additional confidence in the node-counting already in
the tree.
However, the existing PV back ends like xen-disk don't support migration
yet. They will reset the ring and fail
e device.
• Update docs and add MAINTAINERS entry.
v1:
https://lore.kernel.org/qemu-devel/20230302153435.1170111-1-dw...@infradead.org/
https://git.infradead.org/users/dwmw2/qemu.git/shortlog/refs/heads/xenfv-1
David Woodhouse (23):
hw/xen: Add xenstore wire implementation and implement
From: David Woodhouse
The previous commit introduced redirectable gnttab operations fairly
much like-for-like, with the exception of the extra arguments to the
->open() call which were always NULL/0 anyway.
This *changes* the arguments to the ->unmap() operation to include the
origin
From: David Woodhouse
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
docs/system/i386/xen.rst | 30 +++---
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/docs/system/i386/xen.rst b/docs/system/i386/xen.rst
index a00523b492..f06765e88c
From: David Woodhouse
Given that the whole thing supported copy on write from the beginning,
transactions end up being fairly simple. On starting a transaction, just
take a ref of the existing root; swap it back in on a successful commit.
The main tree has a transaction ID too, and we keep
From: Paul Durrant
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
accel/xen/xen-all.c | 11 +-
hw/char/xen_console.c | 2 +-
hw/i386/kvm/xen_xenstore.c | 3 -
hw/i386/kvm/xenstore_impl.h | 8
From: David Woodhouse
This is a fairly simple implementation of a copy-on-write tree.
The node walk function starts off at the root, with 'inplace == true'.
If it ever encounters a node with a refcount greater than one (including
the root node), then that node is shared with other trees
From: David Woodhouse
Whem emulating Xen, multi-page grants are distinctly non-trivial and we
have elected not to support them for the time being. Don't advertise
them to the guest.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/block/xen-block.c | 11 ---
1 file
From: David Woodhouse
Move the existing code using libxengnttab to xen-operations.c and allow
the operations to be redirected so that we can add emulation of grant
table mapping for backend drivers.
In emulation, mapping more than one grant ref to be virtually contiguous
would be fairly
From: David Woodhouse
Starts out fairly simple: a hash table of watches based on the path.
Except there can be multiple watches on the same path, so the watch ends
up being a simple linked list, and the head of that list is in the hash
table. Which makes removal a bit of a PITA but it's not so
From: David Woodhouse
This header is now only for native Xen code, not PV backends that may be
used in Xen emulation. Since the toolstack libraries may depend on the
specific version of Xen headers that they pull in (and will set the
__XEN_TOOLS__ macro to enable internal definitions
From: David Woodhouse
XC_PAGE_SIZE comes from the actual Xen libraries, while XEN_PAGE_SIZE is
provided by QEMU itself in xen_backend_ops.h. For backends which may be
built for emulation mode, use the latter.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/block/dataplane/xen
From: Paul Durrant
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/i386/kvm/xen_xenstore.c | 70 ++
1 file changed, 70 insertions(+)
diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c
index
From: David Woodhouse
This is limited to mapping a single grant at a time, because under Xen the
pages are mapped *contiguously* into qemu's address space, and that's very
hard to do when those pages actually come from anonymous mappings in qemu
in the first place.
Eventually perhaps we can
From: David Woodhouse
Now that we have the redirectable Xen backend operations we can build the
PV backends even without the Xen libraries.
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/9pfs/meson.build| 2 +-
hw/block/dataplane/meson.build | 2 +-
hw/block
From: David Woodhouse
Now that all the work is done to enable the PV backends to work without
actual Xen, instantiate the bus from pc_basic_device_init() for emulated
mode.
This allows us finally to launch an emulated Xen guest with PV disk.
qemu-system-x86_64 -serial mon:stdio -M q35 -cpu
From: David Woodhouse
We provided the backend-facing evtchn functions very early on as part of
the core Xen platform support, since things like timers and xenstore need
to use them.
By what may or may not be an astonishing coincidence, those functions
just *happen* all to have exactly the right
From: David Woodhouse
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/char/xen_console.c| 8 +++---
hw/display/xenfb.c | 20 +++---
hw/xen/xen-operations.c | 45
include/hw/xen/xen_backend_ops.h | 26
set up, leading to the crash.
By simply moving the call to xendev_class->realize() after the initial
xenstore nodes are populated, this sorry state of affairs is avoided.
Reported-by: David Woodhouse
Signed-off-by: Paul Durrant
Signed-off-by: David Woodhouse
Reviewed-by: Paul Durrant
---
hw/x
From: David Woodhouse
There's no need for this to be in the Xen accel code, and as we want to
use the Xen console support with KVM-emulated Xen we'll want to have a
platform-agnostic version of it. Make it use GString to build up the
path while we're at it.
Signed-off-by: David Woodhouse
From: David Woodhouse
This is only part of it; we will also need to get the PV back end drivers
to tear down their own mappings (or do it for them, but they kind of need
to stop using the pointers too).
Some more work on the actual PV back ends and xen-bus code is going to be
needed to really
On Tue, 2023-03-07 at 16:39 +, Paul Durrant wrote:
> On 07/03/2023 16:33, David Woodhouse wrote:
> > On Thu, 2023-03-02 at 15:34 +0000, David Woodhouse wrote:
> > > From: David Woodhouse
> > >
> > > In fact I think we want to only serialize the contents
On Thu, 2023-03-02 at 15:34 +, David Woodhouse wrote:
> From: David Woodhouse
>
> In fact I think we want to only serialize the contents of the domain's
> path in /local/domain/${domid} and leave the rest to be recreated? Will
> defer to Paul for that.
>
> Signed-of
From: David Woodhouse
Signed-off-by: David Woodhouse
---
docs/system/i386/xen.rst | 30 +++---
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/docs/system/i386/xen.rst b/docs/system/i386/xen.rst
index a00523b492..f06765e88c 100644
--- a/docs/system/i386
From: David Woodhouse
Signed-off-by: David Woodhouse
---
MAINTAINERS | 9 +
1 file changed, 9 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index da29661b37..76b705e467 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -443,6 +443,15 @@ F: target/i386/kvm/
F: target/i386/sev*
F
On Tue, 2023-03-07 at 16:07 +, Paul Durrant wrote:
> On 02/03/2023 15:34, David Woodhouse wrote:
> > From: David Woodhouse
> >
> > This is limited to mapping a single grant at a time, because under Xen the
> > pages are mapped *contiguously* into qemu's add
On Tue, 2023-03-07 at 14:44 +, Paul Durrant wrote:
> On 02/03/2023 15:34, David Woodhouse wrote:
> > From: Paul Durrant
> >
> > Signed-off-by: Paul Durrant
> > Signed-off-by: David Woodhouse
> > ---
>
> Reviewed-by: Paul Durrant
You're reviewing y
On Tue, 2023-03-07 at 14:40 +, Paul Durrant wrote:
>
> > -
> > -#define xenforeignmemory_unmap(h, p, s) munmap(p, s * XC_PAGE_SIZE)
> > -
>
> Actually, probably best 'static inline' that, or at least put brackets
> round the 'p' and 's' for safety.
>
That's the one we're *removing* :)
>
On Tue, 2023-03-07 at 10:36 -0300, Daniel Henrique Barboza wrote:
>
> Checkpatch will nag about it claiming that we need spaces between
> '*'. The maintainer can fix it in-tree though.
I saw that and explicitly didn't care. 3/5 of the existing examples
within the tree look like that one — which
On Tue, 2023-03-07 at 13:32 +, Paul Durrant wrote:
>
> Reviewed-by: Paul Durrant
>
> ... with a couple of nits in comments called out below...
Thanks, I'm fixing these and pushing them out to my tree at
https://git.infradead.org/users/dwmw2/qemu.git/shortlog/refs/heads/xenfv
(and
On Tue, 2023-03-07 at 11:29 +, Paul Durrant wrote:
>
> I think you could stash a tail pointer here...
>
> > + }
> > +
> > + if (dom_id && s->nr_domu_watches >= XS_MAX_WATCHES) {
> > + return E2BIG;
> > + }
> > +
> > + w = g_new0(XsWatch, 1);
> > + w->token =
On Thu, 2023-02-02 at 10:10 +0100, Gerd Hoffmann wrote:
> > Thanks, Kevin.
> >
> > I'd like to get the rest of the Xen platform support in to qemu 8.0
> > if
> > possible. Which is currently scheduled for March.
> >
> > Is there likely to be a SeaBIOS release before then which Gerd
> > would
> >
On Tue, 2023-02-21 at 23:05 +0700, Bui Quang Minh wrote:
>
> + def test_physical_x2apic(self):
> + """
> + :avocado: tags=physical_x2apic
> + """
> +
> + self.common_vm_setup(True)
> +
> + self.kernel_params = (self.distro.default_kernel_params +
> +
On Tue, 2023-02-21 at 23:04 +0700, Bui Quang Minh wrote:
> This series implements x2APIC mode in userspace local APIC and the
> RDMSR/WRMSR helper to access x2APIC registers in x2APIC mode. With this
> series, we can now boot up Linux kernel in x2APIC with TCG accelerator.
>
> Bui Quang Minh (4):
On Mon, 2023-03-06 at 11:39 -0500, Peter Xu wrote:
> On Mon, Mar 06, 2023 at 09:25:35AM +0000, David Woodhouse wrote:
> > I think if we want to fix the lack of IR translation faults from the
> > IOMMU, we have to change this anyway.
> >
> > At the very least, it
On Mon, 2023-03-06 at 23:39 +0700, Bui Quang Minh wrote:
> On 3/6/23 22:51, David Woodhouse wrote:
> > On Mon, 2023-03-06 at 11:43 +0100, Igor Mammedov wrote:
> > > > However, there are still problems while trying to extending support to
> > > > APIC ID large
On Tue, 2023-02-21 at 23:04 +0700, Bui Quang Minh wrote:
> @@ -454,7 +500,7 @@ static int apic_find_dest(uint8_t dest)
> }
>
> static void apic_get_delivery_bitmask(uint32_t *deliver_bitmask,
> - uint8_t dest, uint8_t dest_mode)
> +
On Mon, 2023-03-06 at 11:43 +0100, Igor Mammedov wrote:
> > However, there are still problems while trying to extending support to
> > APIC ID larger than 255 because there are many places assume APIC ID is
> > 8-bit long.
>
> that's what I was concerned about (i.e. just enabling x2apic without
On Mon, 2023-03-06 at 06:51 +, David Woodhouse wrote:
> On 5 March 2023 22:36:18 GMT, Peter Xu wrote:
> > On Sun, Mar 05, 2023 at 06:43:42PM +,
> > > ---
> > > Alternative fixes might have been just to remove the part in
> > > ioapic_service() wh
On 5 March 2023 22:36:18 GMT, Peter Xu wrote:
>On Sun, Mar 05, 2023 at 06:43:42PM +,
>> ---
>> Alternative fixes might have been just to remove the part in
>> ioapic_service() which delivers the IRQ via kvm_set_irq() because
>> surely delivering as MSI ought to work just fine anyway in
From: David Woodhouse
A Linux guest will perform IRQ migration after the IRQ has happened,
updating the RTE to point to the new destination CPU and then unmasking
the interrupt.
However, when the guest updates the RTE, ioapic_mem_write() calls
ioapic_service(), which redelivers the pending
On Sat, 2023-03-04 at 09:57 +, David Woodhouse wrote:
> I wonder if the EOI is going missing because it's coming
> from the wrong CPU? Note no 'EOI broadcast' after the last line in the
> log I showed above; it isn't just that I trimmed it there.
I'm running on a host kernel witho
On Sat, 2023-03-04 at 01:28 +0100, Thomas Gleixner wrote:
> David!
>
> On Fri, Mar 03 2023 at 16:54, David Woodhouse wrote:
> > On Fri, 2023-03-03 at 17:51 +0100, Thomas Gleixner wrote:
> > > >
> > > > [ 0.577173] ACPI: \_SB_.LNKC: Enabled at IRQ 11
&
On Fri, 2023-03-03 at 13:46 +, Peter Maydell wrote:
> On Fri, 3 Mar 2023 at 13:44, David Woodhouse
> wrote:
> >
> > On Fri, 2023-03-03 at 11:03 +, Peter Maydell wrote:
> > >
> > > Applied, thanks.
> > >
> > > Please update the
On Fri, 2023-03-03 at 11:03 +, Peter Maydell wrote:
>
> Applied, thanks.
>
> Please update the changelog at https://wiki.qemu.org/ChangeLog/8.0
> for any user-visible changes.
Can I have a wiki account 'dwmw2' with which to do so, please?
smime.p7s
Description: S/MIME cryptographic
From: David Woodhouse
The kernel in Fedora 31 doesn't support 'xen_no_vector_callback' on
its command line, so add a slightly newer version as a prelude to
enabling avocado tests for Xen guests.
Signed-off-by: David Woodhouse
---
tests/avocado/avocado_qemu/__init__.py | 27
already in Paolo's pull request. After phase 2 of the
Xen support is merged, we can switch it to use xen-disk instead.
The warnings about not being able to validate the kernel and initrd
images made me sad, so I added hashes of those to the distro structure.
David Woodhouse (2):
tests
From: David Woodhouse
Signed-off-by: David Woodhouse
---
tests/avocado/xen_guest.py | 113 +
1 file changed, 113 insertions(+)
create mode 100644 tests/avocado/xen_guest.py
diff --git a/tests/avocado/xen_guest.py b/tests/avocado/xen_guest.py
new file mode
On 2 March 2023 22:40:40 GMT, "Philippe Mathieu-Daudé"
wrote:
>Since v2: rebased
>
>I'm posting this series as it to not block Bernhard's PIIX
>cleanup work. I don't have code change planned, but eventually
>reword / improve commit descriptions.
>
>Tested commit after commit to be sure it is
From: David Woodhouse
There's no need for this to be in the Xen accel code, and as we want to
use the Xen console support with KVM-emulated Xen we'll want to have a
platform-agnostic version of it. Make it use GString to build up the
path while we're at it.
Signed-off-by: David Woodhouse
From: David Woodhouse
Now that all the work is done to enable the PV backends to work without
actual Xen, instantiate the bus from pc_basic_device_init() for emulated
mode.
This allows us finally to launch an emulated Xen guest with PV disk.
qemu-system-x86_64 -serial mon:stdio -M q35 -cpu
From: David Woodhouse
Signed-off-by: David Woodhouse
---
hw/i386/kvm/xen_xenstore.c | 16
1 file changed, 16 insertions(+)
diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c
index 028f80499e..f9b7387024 100644
--- a/hw/i386/kvm/xen_xenstore.c
+++ b/hw/i386
From: David Woodhouse
This is limited to mapping a single grant at a time, because under Xen the
pages are mapped *contiguously* into qemu's address space, and that's very
hard to do when those pages actually come from anonymous mappings in qemu
in the first place.
Eventually perhaps we can
From: David Woodhouse
This header is now only for native Xen code, not PV backends that may be
used in Xen emulation. Since the toolstack libraries may depend on the
specific version of Xen headers that they pull in (and will set the
__XEN_TOOLS__ macro to enable internal definitions
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