Add the Xenstore feature value to the output of "xl info" in order to
prepare for a future capability to limit Xenstore features visible by
a guest.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
Acked-by: Anthony PERARD
---
tools/xl/Makefile | 3 ++-
tools/xl/xl_i
Add a guest config parameter "xenstore_feature_mask" allowing to limit
the Xenstore features the guest can see and use. This can be needed in
order to allow migrating a guest to a host running a Xenstore version
providing less features than the source host.
Signed-off-by: Juergen Gross
). Oxenstored is not covered.
Changes in V2:
- added Jason's Reviewed-by: tags
- a small fix of patch 4
Changes in V3:
- patches 1-5 have gone in already
- 2 fixes in patch
Juergen Gross (2):
tools/xl: add available Xenstore features to xl info output
tools: allow to limit xenstore features via
Live update is now working with the PVH variant of xenstore-stubdom.
Signed-off-by: Juergen Gross
---
V2:
- new patch
---
SUPPORT.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/SUPPORT.md b/SUPPORT.md
index 6a82a92189..eb44ee85fd 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
Signed-off-by: Juergen Gross
---
V2:
- new patch
---
CHANGELOG.md | 1 +
1 file changed, 1 insertion(+)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f31ca08fe..d118bb1c8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,7 @@ The format is based on [Keep a
Changelog](https
In order to reactivate an event channel after kexec() of Mini-OS,
libxenevtchn needs to allocate the port data for the event channel
and set the handler again. Add a new interface xenevtchn_bind()
for that purpose, available under Mini-OS only.
Signed-off-by: Juergen Gross
Reviewed-by: Jason
Pass the live_update bool to stubdom_init() in order to be able to
handle it properly under Mini-OS.
As stubdom_init() will (re-)create the 9pfs device needed for
reading the saved state, call stubdom_init() before lu_read_state().
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
After performing a live update in stubdom environment some information
about inter-domain event channels is lost. In order to set this
information again, call xenevtchn_bind() from new_domain() in the
restore case.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/xenstored
With Mini-OS now supporting the O_CLOEXEC flag for the kexec case,
set the related cloexec flag in minios.c.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
Acked-by: Anthony PERARD
---
tools/libs/gnttab/minios.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/libs/gnttab
e exceeding 4GB.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
V2:
- move to start of series
V3:
- change offset to off64_t and size to size_t (Andrew Cooper)
---
tools/xenstored/lu.c | 97 +++-
1 file changed, 60 insertions(+), 37 deletions(-
When running in a stubdom environment xenevtchn_fdopen() won't work,
as any file descriptor state is lost across kexec().
Use a wrapper to replace the call of xenevtchn_fdopen() with the
really needed xenevtchn_open() when running on top of Mini-OS.
Signed-off-by: Juergen Gross
Review
With Mini-OS now supporting O_CLOEXEC for the kexec case, no longer
ignore the XENEVTCHN_NO_CLOEXEC flag in minios.c.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
Acked-by: Anthony PERARD
---
tools/libs/evtchn/minios.c | 6 ++
1 file changed, 2 insertions(+), 4 deletions
1 and 5
Juergen Gross (9):
xenstored: use fread() instead of mmap() for reading live update state
libevtchn: add O_CLOEXEC support for Mini-OS
libxengnttab: set the cloexec flag on Mini-OS
xenstored: don't use xenevtchn_fdopen() in stubdom
tools/libxenevtchn: add xenevtchn_bind()
On 30.07.25 08:18, Jürgen Groß wrote:
On 29.07.25 21:25, Andrew Cooper wrote:
On 29/07/2025 8:21 pm, Andrew Cooper wrote:
On 29/07/2025 12:01 pm, Juergen Gross wrote:
diff --git a/tools/xenstored/lu.c b/tools/xenstored/lu.c
index 77e0d377c5..f2c8b92d07 100644
--- a/tools/xenstored/lu.c
+++ b
Signed-off-by: Juergen Gross
---
V2:
- new patch
---
CHANGELOG.md | 1 +
1 file changed, 1 insertion(+)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f31ca08fe..d118bb1c8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,7 @@ The format is based on [Keep a
Changelog](https
Live update is now working with the PVH variant of xenstore-stubdom.
Signed-off-by: Juergen Gross
---
V2:
- new patch
---
SUPPORT.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/SUPPORT.md b/SUPPORT.md
index 6a82a92189..eb44ee85fd 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
After performing a live update in stubdom environment some information
about inter-domain event channels is lost. In order to set this
information again, call xenevtchn_bind() from new_domain() in the
restore case.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/xenstored
Pass the live_update bool to stubdom_init() in order to be able to
handle it properly under Mini-OS.
As stubdom_init() will (re-)create the 9pfs device needed for
reading the saved state, call stubdom_init() before lu_read_state().
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
When running in a stubdom environment xenevtchn_fdopen() won't work,
as any file descriptor state is lost across kexec().
Use a wrapper to replace the call of xenevtchn_fdopen() with the
really needed xenevtchn_open() when running on top of Mini-OS.
Signed-off-by: Juergen Gross
Review
small performance impact for the daemon live update case, but it
should be neglectable.
Changes in V2:
- rebase
- former patches 1 and 2 have been committed already
- former patch 5 moved to start of the series (has all needed Acks)
- new patches 8 and 9
Juergen Gross (9):
xenstored: use fread
With Mini-OS now supporting O_CLOEXEC for the kexec case, no longer
ignore the XENEVTCHN_NO_CLOEXEC flag in minios.c.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/libs/evtchn/minios.c | 6 ++
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/tools/libs
In order to reactivate an event channel after kexec() of Mini-OS,
libxenevtchn needs to allocate the port data for the event channel
and set the handler again. Add a new interface xenevtchn_bind()
for that purpose, available under Mini-OS only.
Signed-off-by: Juergen Gross
Reviewed-by: Jason
With Mini-OS now supporting the O_CLOEXEC flag for the kexec case,
set the related cloexec flag in minios.c.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/libs/gnttab/minios.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/libs/gnttab/minios.c b/tools/libs/gnttab
Mini-OS doesn't support using mmap() for accessing a file. In order
to support reading the live update state from a 9pfs based file, use
fread() instead of mmap().
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
V2:
- move to start of series
---
tools/xenstored/lu.c
Use the newest Mini-OS.
Signed-off-by: Juergen Gross
---
Config.mk | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Config.mk b/Config.mk
index 20e4382ef8..7edbab8efe 100644
--- a/Config.mk
+++ b/Config.mk
@@ -208,7 +208,7 @@ QEMU_UPSTREAM_URL ?=
https://xenbits.xen.org/git
Add a small pool of statically allocated memory pages to be handed out
for very early page table allocations.
This will make it possible to do virtual allocations e.g. for mapping
the shared info page.
Signed-off-by: Juergen Gross
---
V2:
- add comment (Jan Beulich)
- drop N_PT in favor of
There is no need to use a populated memory page for mapping the shared
info page at that location. Just use an allocated virtual address for
the shared info page. For PVH allocate an unused pfn.
Signed-off-by: Juergen Gross
---
V2:
- don't leak virtual page in map_shared_page() (Jan Be
the RAM areas,
resulting in a net win of one memory page.
Changes in V2:
- addressed comments by Jan
Juergen Gross (2):
mm: provide a way to do very early page table allocations
x86: don't use a memory page for mapping the shared info page
arch/x86/mm.c | 20
):
xen/netfront: Fix TX response spurious interrupts
Dr. David Alan Gilbert (1):
xen: Remove some deadcode (x)
Juergen Gross (1):
xen/gntdev: remove struct gntdev_copy_batch from stack
Peng Jiang (1):
xen/xenbus: fix W=1 build warning in xenbus_va_dev_error function
Ryan Chung (1
Add a guest config parameter "xenstore_feature_mask" allowing to limit
the Xenstore features the guest can see and use. This can be needed in
order to allow migrating a guest to a host running a Xenstore version
providing less features than the source host.
Signed-off-by: Juergen Gross
Add support for XS_SET_FEATURE and XS_GET_FEATURE to xenstored.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/xenstored/core.c | 4 +++
tools/xenstored/domain.c | 60
tools/xenstored/domain.h | 8 ++
3 files changed, 72
now only version 1 is supported.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/xenstored/control.c | 6 ++---
tools/xenstored/lu.c| 21 ++-
tools/xenstored/lu.h| 1 +
tools/xs-clients/xenstore_control.c | 41
he current known
one.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/xenstored/control.c| 2 +-
tools/xenstored/lu.c | 2 +-
tools/xenstored/xenstore_state.h | 31 ++-
3 files changed, 32 insertions(+), 3 deletions(-)
diff --g
). Oxenstored is not covered.
Changes in V2:
- added Jason's Reviewed-by: tags
- a small fix of patch 4
Juergen Gross (7):
tools/libs/store: add get- and set-feature related functions
tools/xenstored: support specification of migration stream version
tools/xenstored: add missing migration r
Add the Xenstore feature value to the output of "xl info" in order to
prepare for a future capability to limit Xenstore features visible by
a guest.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/xl/Makefile | 3 ++-
tools/xl/xl_info.c | 22 +
features to guests by setting the appropriate
bits in the ring page.
Signed-off-by: Juergen Gross
---
V2:
- move setting interface->server_features to introduce_domain()
---
tools/xenstored/domain.c | 60 +++-
tools/xenstored/domain.h | 3 ++
tools/xenstored/l
specific
domain.
xs_set_features_domain(): set the features available for a specific
domain.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
tools/include/xenstore.h | 13 +
tools/libs/store/Makefile| 2 +-
tools/libs/store/libxenstore.map | 6
tools
On 25.07.25 07:18, Jürgen Groß wrote:
On 25.07.25 00:48, Jason Andryuk wrote:
On 2025-07-22 10:06, Juergen Gross wrote:
Add per domain server features, which are initialized by the supported
features at domain introduction, or by live update from the migration
stream. This requires to add
Add a guest config parameter "xenstore_feature_mask" allowing to limit
the Xenstore features the guest can see and use. This can be needed in
order to allow migrating a guest to a host running a Xenstore version
providing less features than the source host.
Signed-off-by: Juergen Gross
Add the Xenstore feature value to the output of "xl info" in order to
prepare for a future capability to limit Xenstore features visible by
a guest.
Signed-off-by: Juergen Gross
---
tools/xl/Makefile | 3 ++-
tools/xl/xl_info.c | 22 ++
2 files changed, 24 insert
features to guests by setting the appropriate
bits in the ring page.
Signed-off-by: Juergen Gross
---
tools/xenstored/domain.c | 71
tools/xenstored/domain.h | 3 ++
tools/xenstored/lu.c | 14 ++--
tools/xenstored/lu.h | 2 +-
4 files changed, 80
Add support for XS_SET_FEATURE and XS_GET_FEATURE to xenstored.
Signed-off-by: Juergen Gross
---
tools/xenstored/core.c | 4 +++
tools/xenstored/domain.c | 60
tools/xenstored/domain.h | 8 ++
3 files changed, 72 insertions(+)
diff --git a/tools
now only version 1 is supported.
Signed-off-by: Juergen Gross
---
tools/xenstored/control.c | 6 ++---
tools/xenstored/lu.c| 21 ++-
tools/xenstored/lu.h| 1 +
tools/xs-clients/xenstore_control.c | 41 ++---
4 files
specific
domain.
xs_set_features_domain(): set the features available for a specific
domain.
Signed-off-by: Juergen Gross
---
tools/include/xenstore.h | 13 +
tools/libs/store/Makefile| 2 +-
tools/libs/store/libxenstore.map | 6
tools/libs/store/xs.c
he current known
one.
Signed-off-by: Juergen Gross
---
tools/xenstored/control.c| 2 +-
tools/xenstored/lu.c | 2 +-
tools/xenstored/xenstore_state.h | 31 ++-
3 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/tools/xenstored/control
). Oxenstored is not covered.
Juergen Gross (7):
tools/libs/store: add get- and set-feature related functions
tools/xenstored: support specification of migration stream version
tools/xenstored: add missing migration record definitions
tools/xenstored: add server feature support
tools/xenstored
Anthony,
could you please have a look at patches 3, 4 and 7? They are lacking a
tools maintainer's comment.
Juergen
On 02.07.25 10:12, Juergen Gross wrote:
With this series applied I was able to perform Live Update of Xenstore
running in a PVH stubdom.
This series is based on a related
pulating of cpu_data[]")
Signed-off-by: Jan Beulich
Reviewed-by: Juergen Gross
Juergen
OpenPGP_0xB0DE9DD628BF132F.asc
Description: OpenPGP public key
OpenPGP_signature.asc
Description: OpenPGP digital signature
On 16.07.25 23:15, Jason Andryuk wrote:
Factor out the xenstore setup code into configure_xenstore(). This is
in preparation for handling already-introduced domains.
Signed-off-by: Jason Andryuk
---
tools/helpers/init-dom0less.c | 51 ---
1 file changed, 36 i
On 16.07.25 23:15, Jason Andryuk wrote:
Replace dom0_init() with init_domains() which uses libxenmanage to
iterate through all existing domains and introduce them.
dom0_domid is updated with the xenstore domain, since it really
indicates the local domain.
I agree with that explanation, but I w
On 16.07.25 23:15, Jason Andryuk wrote:
fire_special_watches() can only be called after setup_structure() has
been called. If it is called before setup_structure(), the hashtable
search will segfault as the nodes hashtable has not been allocated.
Normally, dom0 is setup up first and setup_struc
Use the newest Mini-OS.
Signed-off-by: Juergen Gross
---
Config.mk | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Config.mk b/Config.mk
index 55b1b83d49..6430a871cb 100644
--- a/Config.mk
+++ b/Config.mk
@@ -208,7 +208,7 @@ QEMU_UPSTREAM_URL ?=
https://xenbits.xen.org/git
cycle,
so no need for playing "stable interface" games. :-)
Signed-off-by: Jason Andryuk
Reviewed-by: Juergen Gross
Juergen
OpenPGP_0xB0DE9DD628BF132F.asc
Description: OpenPGP public key
OpenPGP_signature.asc
Description: OpenPGP digital signature
, returned as 0. */
+uint16_t caps; /* Must be 0 on input, returned as 0. */
I'd drop the "returned as 0" in the comment. :-)
With that fixed:
Reviewed-by: Juergen Gross
Juergen
OpenPGP_0xB0DE9DD628BF132F.asc
Description: OpenPGP public key
OpenPGP_signature.asc
Description: OpenPGP digital signature
On 16.07.25 23:14, Jason Andryuk wrote:
Make introduce_domain() use an event channel from the the xenstore page.
It is only used if non-zero. Otherwise the passed in event channel port
is used.
The is useful for a xenstored stubdom to configure domains autonomously.
Signed-off-by: Jason Andryu
On 16.07.25 23:14, Jason Andryuk wrote:
Write the associated event channel into the xenstore page so xenstored
can read it. xenstored can map the grant by the reserved grant table
entry, and then read out the event channel and bind it. This eliminates
the need for an additional mechanism to dis
index, so no further information is needed.
Suggested-by: Juergen Gross
Signed-off-by: Jason Andryuk
---
xen/include/public/io/xs_wire.h | 7 +++
1 file changed, 7 insertions(+)
diff --git a/xen/include/public/io/xs_wire.h b/xen/include/public/io/xs_wire.h
index e92a87a07b..f2c0afd107
On 02.07.25 10:12, Juergen Gross wrote:
With this series applied I was able to perform Live Update of Xenstore
running in a PVH stubdom.
This series is based on a related Mini-OS patch series AND it needs
the Mini-OS commit id updated accordingly in Config.mk.
One relevant change in this
before having read the saved state).
Add an alternative init function for a 9pfs device supporting to take
the configuration from the kexec module instead of Xenstore. Add
support for creating the device using the kexec module, too.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
Move the Xenstore and backend interface related handling into a
sub-function in order to prepare supporting reconnecting to an active
9pfs device after kexec.
Don't use gnttab_alloc_and_grant(), as this will hard code to use dom0
as backend.
Signed-off-by: Juergen Gross
Reviewed-by:
Add a new function gnttab_get_addr() to obtain a memory pointer for a
given grant reference.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
gnttab.c | 10 ++
include/gnttab.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/gnttab.c b/gnttab.c
index 6bac0905
Export the bind_evtchn() function, as it will be needed for
reactivating events after kexec().
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
events.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/events.c b/events.c
index 9f3dbf05..a9c1ccac 100644
--- a/events.c
+++ b
users, there doesn't seem to be
a real demand for that function.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
gnttab.c | 13 -
include/gnttab.h | 1 -
2 files changed, 14 deletions(-)
diff --git a/gnttab.c b/gnttab.c
index 5b04ab01..6bac0905 100644
fying it as a module in
struct hvm_start_info.
The contents of the memory area are described via a generic table of
contents in the last page of the memory.
Signed-off-by: Juergen Gross
---
V2:
- set kexec_mod_start in kexec_check_module()
- remove fallback definition of CONFIG_KEXEC_MODULE_PAGES
Add support for a Mini-OS config file containing config items with
numerical values, e.g. CONFIG_FOO=7.
Signed-off-by: Juergen Gross
Reviewed-by: Jan Beulich
---
Config.mk | 4
1 file changed, 4 insertions(+)
diff --git a/Config.mk b/Config.mk
index e2afb1b4..b9675e61 100644
--- a
Add the needed functions for allocating and freeing memory pages of
the kexec module.
As the pages are always related to a kexec module record, add the
related utility functions, too. For now only support adding records
and retrieving them.
Signed-off-by: Juergen Gross
Reviewed-by: Jason
that new type can
easily be filtered out when building the memory map for the new
kernel.
Introduce the type E820_TYPE_SOFT_RESERVED with the same value as the
Linux kernel is using for the same purpose.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
arch/x86/kexec.c | 4 +++-
e
Use struct dev_9pfs for storing the backend path of the device state
in order to avoid code duplication in init_9pfront() and
shutdown_9pfront().
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
9pfront.c | 23 ++-
1 file changed, 10 insertions(+), 13 deletions
will make it easier to add new data items without having to
rewrite large portions of the function.
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
arch/x86/kexec.c | 18 +++---
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kexec.c b/arch/x86/kex
("mini-os: kexec: build parameters for new kernel")
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
V2:
- rename kexec_param_loc to kexec_param_pa (Jason Andryuk)
---
arch/x86/kexec.c | 12 ++--
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/x86
perform a Xenstore live update an associated
patch series for Xen is needed. The Xen series is depending on this
Mini-OS patch series.
Changes in V2:
- patches 1-5 of V1 have been applied already
- addressed the (minor) comments to V1
Juergen Gross (14):
mm: don't add module pages to free m
a lapic.
So when finding the lapic page to be marked as reserved, don't add
it to the number of reserved pages.
Fixes: 9b87429d2864 ("mini-os: fix number of pages for PVH")
Signed-off-by: Juergen Gross
Reviewed-by: Jason Andryuk
---
e820.c | 3 +++
1 file changed, 3 insertions(+
pages are below the page tables.
Signed-off-by: Juergen Gross
---
V2:
- call pvh_reserve_start_info() from arch_mm_preinit() (Jason Andryuk)
---
arch/x86/mm.c | 77 +++
include/mm.h | 1 +
mm.c | 21 +-
3 files changed, 98 inser
On 14.07.25 23:23, Jason Andryuk wrote:
On 2025-07-02 04:12, Juergen Gross wrote:
Add a new function gnttab_get_addr() to obtain a memory pointer for a
given grant reference.
Signed-off-by: Juergen Gross
Maybe you want to name it gnttab_get_vaddr() to be a little more explicit in its
On 14.07.25 23:22, Jason Andryuk wrote:
On 2025-07-11 03:49, Jürgen Groß wrote:
On 11.07.25 01:21, Jason Andryuk wrote:
On 2025-07-02 04:12, Juergen Gross wrote:
Especially for support of Xenstore-stubdom live update some memory must
be handed over to the new kernel without moving it around
On 10.07.25 18:11, Anthoine Bourgeois wrote:
We found at Vates that there are lot of spurious interrupts when
benchmarking the PV drivers of Xen. This issue appeared with a patch
that addresses security issue XSA-391 (see Fixes below). On an iperf
benchmark, spurious interrupts can represent up t
e820_get_reserved_pfns() needs to make sure to reserve only page
aligned memory areas.
Fixes: a7d27a7332ba ("mini-os: add memory map service functions")
Signed-off-by: Juergen Gross
---
e820.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/e820.c b/e820.c
inde
kends, handle this case gracefully.
Fixes: 19ab8356abe4 ("tools: remove support for running a guest with
qemu-traditional")
Signed-off-by: Juergen Gross
---
tools/libs/light/libxl_create.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/libs/light/libxl_c
On 26.06.25 17:13, Juergen Gross wrote:
With the related change having been added to Mini-OS, the single V1
patch can now be expanded to a 3 patch series, especially meant to
untangle the close dependencies between grub-pv and Mini-OS internals.
Changes in V2:
- add comment to patch 1
- added
On 02.07.25 10:12, Juergen Gross wrote:
Especially for support of Xenstore-stubdom live update some memory must
be handed over to the new kernel without moving it around: as the
9pfs device used for storing and retrieving the state of Xenstore
needs to be kept operational across kexec (it can&#
Add a small pool of statically allocated memory pages to be handed out
for very early page table allocations.
This will make it possible to do virtual allocations e.g. for mapping
the shared info page.
Signed-off-by: Juergen Gross
---
arch/x86/mm.c | 16 +++-
1 file changed, 15
There is no need to use a populated memory page for mapping the shared
info page at that location. Just use an allocated virtual address for
the shared info page. For PVH allocate an unused pfn.
Signed-off-by: Juergen Gross
---
arch/x86/mm.c | 7 ---
arch/x86/setup.c | 15
the RAM areas,
resulting in a net win of one memory page.
Juergen Gross (2):
mm: provide a way to do very early page table allocations
x86: don't use a memory page for mapping the shared info page
arch/x86/mm.c | 23 +++
arch/x86/setup.c | 15 ---
arc
: Juergen Gross
Juergen
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- cpupool_unassign_cpu_helper
- cpupool_unassign_cpu
Signed-off-by: Penny Zheng
Reviewed-by: Stefano Stabellini
Reviewed-by: Juergen Gross
Juergen
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On 07.07.25 05:13, Penny Zheng wrote:
The following function shall be wrapped:
- scheduler_id()
Signed-off-by: Penny Zheng
Reviewed-by: Stefano Stabellini
Reviewed-by: Juergen Gross
Juergen
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On 03.07.25 19:35, Christophe JAILLET wrote:
Le 03/07/2025 à 07:22, Jürgen Groß a écrit :
On 03.07.25 00:42, Tu Dinh wrote:
On 01/07/2025 23:53, Abinash wrote:
Hi ,
Thanks for pointing that out.
I haven’t measured the performance impact yet — my main focus was on
getting rid of the stack usa
Abinash Singh
Signed-off-by: Juergen Gross
---
drivers/xen/gntdev-common.h | 4 +++
drivers/xen/gntdev.c| 71 ++---
2 files changed, 54 insertions(+), 21 deletions(-)
diff --git a/drivers/xen/gntdev-common.h b/drivers/xen/gntdev-common.h
index 9c286b2a
After performing a live update in stubdom environment some information
about inter-domain event channels is lost. In order to set this
information again, call xenevtchn_bind() from new_domain() in the
restore case.
Signed-off-by: Juergen Gross
---
tools/xenstored/core.c | 1 -
tools/xenstored
will make it easier to add new data items without having to
rewrite large portions of the function.
Signed-off-by: Juergen Gross
---
arch/x86/kexec.c | 18 +++---
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kexec.c b/arch/x86/kexec.c
index d84df42c..3e3b6
Move the Xenstore and backend interface related handling into a
sub-function in order to prepare supporting reconnecting to an active
9pfs device after kexec.
Signed-off-by: Juergen Gross
---
9pfront.c | 136 ++
1 file changed, 86 insertions
users, there doesn't seem to be
a real demand for that function.
Signed-off-by: Juergen Gross
---
gnttab.c | 13 -
include/gnttab.h | 1 -
2 files changed, 14 deletions(-)
diff --git a/gnttab.c b/gnttab.c
index 5b04ab01..6bac0905 100644
--- a/gnttab.c
+++ b/gnttab.c
@@ -1
When running in a stubdom environment xenevtchn_fdopen() won't work,
as any file descriptor state is lost across kexec().
Use a wrapper to replace the call of xenevtchn_fdopen() with the
really needed xenevtchn_open() when running on top of Mini-OS.
Signed-off-by: Juergen Gross
---
Add support for a Mini-OS config file containing config items with
numerical values, e.g. CONFIG_FOO=7.
Signed-off-by: Juergen Gross
---
Config.mk | 4
1 file changed, 4 insertions(+)
diff --git a/Config.mk b/Config.mk
index e2afb1b4..b9675e61 100644
--- a/Config.mk
+++ b/Config.mk
a lapic.
So when finding the lapic page to be marked as reserved, don't add
it to the number of reserved pages.
Fixes: 9b87429d2864 ("mini-os: fix number of pages for PVH")
Signed-off-by: Juergen Gross
---
e820.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/e820.c
Add a new function gnttab_get_addr() to obtain a memory pointer for a
given grant reference.
Signed-off-by: Juergen Gross
---
gnttab.c | 10 ++
include/gnttab.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/gnttab.c b/gnttab.c
index 6bac0905..52d6792a 100644
--- a
Deactivate the VIRQ_TIMER event when doing kexec() in order to be
able to set it up again in the new kernel.
Signed-off-by: Juergen Gross
---
arch/x86/time.c | 14 ++
1 file changed, 14 insertions(+)
diff --git a/arch/x86/time.c b/arch/x86/time.c
index 52916e15..3a2a1d29 100644
fying it as a module in
struct hvm_start_info.
The contents of the memory area are described via a generic table of
contents in the last page of the memory.
Signed-off-by: Juergen Gross
---
Config.mk | 2 ++
arch/x86/kexec.c | 77 +++
arc
Pass the live_update bool to stubdom_init() in order to be able to
handle it properly under Mini-OS.
As stubdom_init() will (re-)create the 9pfs device needed for
reading the saved state, call stubdom_init() before lu_read_state().
Signed-off-by: Juergen Gross
---
tools/xenstored/core.c | 4
With Mini-OS now supporting the O_CLOEXEC flag for the kexec case,
set the related cloexec flag in minios.c.
Signed-off-by: Juergen Gross
---
tools/libs/gnttab/minios.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/libs/gnttab/minios.c b/tools/libs/gnttab/minios.c
index cac89f0ba6
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