the color
ranges.
Documentation is also added.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v9:
- turned warning into error in case of coloring not enabled
v8:
- warn the user in case of coloring not supported at hypervisor level
v7:
it
in Dom0 construction bring it back to domain_build.c and declare it in
domain_build.h.
Take the opportunity to adapt the implementation of allocate_memory() so
that it uses the host layout when called on the hwdom, via
find_unallocated_memory().
Signed-off-by: Carlo Nonato
---
v9:
- no changes
v
umber of colors that fit in a 4 KiB page when integers
are 4 bytes long.
LLC colors are a property of the domain, so struct domain has to be extended.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v9:
- dropped _MAX_
eap() debug-key function.
Based on original work from: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
---
v9:
- added ASSERT(order == 0) when freeing a colored page
- moved buddy_alloc_size initialization logic in Kconfig
v8:
- requests that uses MEMF_* flags that can'
rarily available for relocation.
This implies that Xen protection must happen after the copy.
Finally, since the alternative framework needs to remap the Xen text and
inittext sections, this operation must be done in a coloring-aware way.
The function xen_remap_colored() is introduced for that.
pport the static-mem feature.
The solution has been tested in several scenarios, including Xilinx Zynq
MPSoCs.
Carlo Nonato (12):
xen/common: add cache coloring common code
xen/arm: add initial support for LLC coloring on arm64
xen/arm: permit non direct-mapped Dom0 construction
xen/arm
mapping Dom0 isn't possible when coloring is enabled, so
CDF_directmap flag is removed when creating it.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
Reviewed-by: Jan Beulich
---
v9:
- moved domain_llc_coloring_free() in next patch cause
Add the "llc-colors" Device Tree attribute to express DomUs and Dom0less
color configurations.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v9:
- use best-effort allocation in domain_set_llc_colors_from_str()
v8:
- fixed memo
allocation and cache coloring are incompatible because static
memory can't be guaranteed to use only colors assigned to the domain.
Panic during DomUs creation when both are enabled.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v9:
also when NUMA will be supported on Arm.
Signed-off-by: Carlo Nonato
Acked-by: Julien Grall
---
v9:
- no changes
v8:
- no changes
v7:
- no changes
v6:
- Carlo Nonato as the only signed-off-by
v5:
- new patch
---
xen/arch/arm/mmu/p2m.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions
2. Move it to mmu/setup.c and make it
non-static so that it can be used outside.
Signed-off-by: Carlo Nonato
---
v9:
- no changes
v8:
- patch adapted to new changes to consider_modules()
v7:
- moved consider_modules() to arm/mmu/setup.c
v6:
- new patch
---
xen/arch/arm/arm32/mmu/mm.c
Add a new domctl hypercall to allow the user to set LLC coloring
configurations. Colors can be set only once, just after domain creation,
since recoloring isn't supported.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
Reviewed-by
essly partitions a cache memory that is already private, i.e.
underutilize it.
Signed-off-by: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
Reviewed-by: Jan Beulich
---
v9:
- no changes
v8:
- added bound check on xen_colors in llc_coloring_init()
v7:
- removed XEN_DEFAULT_
Hi Jan,
On Tue, Nov 5, 2024 at 4:59 PM Jan Beulich wrote:
>
> On 25.10.2024 11:50, Carlo Nonato wrote:
> > PGC_static and PGC_extra needs to be preserved when assigning a page.
> > Define a new macro that groups those flags and use it instead of or'ing
> > every ti
Hi Jan
On Tue, Nov 5, 2024 at 5:11 PM Jan Beulich wrote:
>
> On 25.10.2024 11:50, Carlo Nonato wrote:
> > --- a/docs/misc/xen-command-line.pandoc
> > +++ b/docs/misc/xen-command-line.pandoc
> > @@ -270,6 +270,20 @@ and not running softirqs. Reduce this if softirq
Hi Jan,
On Thu, Nov 7, 2024 at 10:05 AM Jan Beulich wrote:
>
> On 06.11.2024 17:09, Carlo Nonato wrote:
> > On Tue, Nov 5, 2024 at 4:46 PM Jan Beulich wrote:
> >> On 25.10.2024 11:50, Carlo Nonato wrote:
> >>> --- a/xen/common/Kconfig
> >>>
extra before freeing new pages as this is
considered an error and can cause ASSERT violations.
Signed-off-by: Carlo Nonato
---
v9:
- add PGC_broken to PGC_preserved
- clear PGC_extra in alloc_domheap_pages() only if MEMF_no_refcount is set
v8:
- fixed PGC_extra ASSERT fail in alloc_domheap_pages
On Tue, Nov 5, 2024 at 4:46 PM Jan Beulich wrote:
>
> On 25.10.2024 11:50, Carlo Nonato wrote:
> > Last Level Cache (LLC) coloring allows to partition the cache in smaller
> > chunks called cache colors.
> >
> > Since not all architectures can actually implement i
Hi Michal,
On Thu, Nov 28, 2024 at 11:34 AM Michal Orzel wrote:
> On 19/11/2024 15:13, Carlo Nonato wrote:
> >
> >
> > Cache coloring requires Dom0 not to be direct-mapped because of its non
> > contiguous mapping nature, so allocate_memory() is needed in this c
Hi Jan,
On Thu, Nov 28, 2024 at 12:05 PM Jan Beulich wrote:
>
> On 19.11.2024 15:13, Carlo Nonato wrote:
> > PGC_static, PGC_extra and PGC_broken need to be preserved when assigning a
> > page. Define a new macro that groups those flags and use it instead of
> &g
Hi Jan,
On Thu, Nov 28, 2024 at 12:43 PM Jan Beulich wrote:
>
> On 19.11.2024 15:13, Carlo Nonato wrote:
> > --- a/docs/misc/xen-command-line.pandoc
> > +++ b/docs/misc/xen-command-line.pandoc
> > @@ -270,6 +270,20 @@ and not running softirqs. Reduce this if softirq
rarily available for relocation.
This implies that Xen protection must happen after the copy.
Finally, since the alternative framework needs to remap the Xen text and
inittext sections, this operation must be done in a coloring-aware way.
The function xen_remap_colored() is introduced for that.
essly partitions a cache memory that is already private, i.e.
underutilize it.
Signed-off-by: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
Reviewed-by: Jan Beulich
---
v10:
- no changes
v9:
- no changes
v8:
- added bound check on xen_colors in llc_coloring_init()
v7:
- re
al of PGC_extra before freeing domain pages as this is
considered an error and can cause ASSERT violations.
Signed-off-by: Carlo Nonato
---
v10:
- fixed commit message
v9:
- add PGC_broken to PGC_preserved
- clear PGC_extra in alloc_domheap_pages() only if MEMF_no_refcount is set
v8:
- fixed PGC_
er of colors that fit in a 4 KiB page when integers
are 4 bytes long.
LLC colors are a property of the domain, so struct domain has to be extended.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v10:
- fixed commit message to use LLC_COLORS_
2. Move it to mmu/setup.c and make it
non-static so that it can be used outside.
Signed-off-by: Carlo Nonato
---
v10:
- no changes
v9:
- no changes
v8:
- patch adapted to new changes to consider_modules()
v7:
- moved consider_modules() to arm/mmu/setup.c
v6:
- new patch
---
xen/arch/arm/arm3
allocation and cache coloring are incompatible because static
memory can't be guaranteed to use only colors assigned to the domain.
Panic during DomUs creation when both are enabled.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v10:
-
Add a new domctl hypercall to allow the user to set LLC coloring
configurations. Colors can be set only once, just after domain creation,
since recoloring isn't supported.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
Reviewed-by
Add the "llc-colors" Device Tree attribute to express DomUs and Dom0less
color configurations.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
Reviewed-by: Jan Beulich # non-Arm
---
v10:
- no changes
v9:
- use best-effort all
pport the static-mem feature.
The solution has been tested in several scenarios, including Xilinx Zynq
MPSoCs.
Carlo Nonato (11):
xen/common: add cache coloring common code
xen/arm: add initial support for LLC coloring on arm64
xen/arm: permit non direct-mapped Dom0 construction
xen/arm
mapping Dom0 isn't possible when coloring is enabled, so
CDF_directmap flag is removed when creating it.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
Reviewed-by: Jan Beulich
---
v10:
- fixed array type for colors parameter in check_colors
the color
ranges.
Documentation is also added.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v10:
- no changes
v9:
- turned warning into error in case of coloring not enabled
v8:
- warn the user in case of coloring not supported at hyperviso
it
in Dom0 construction bring it back to domain_build.c and declare it in
domain_build.h.
Take the opportunity to adapt the implementation of allocate_memory() so
that it uses the host layout when called on the hwdom, via
find_unallocated_memory().
Signed-off-by: Carlo Nonato
---
v10:
- fixed a compi
Hi all,
I would like to see "Arm cache coloring" in 4.20. I just sent v10.
Best regards.
- Carlo Nonato
On Tue, Nov 12, 2024 at 5:16 PM Oleksii Kurochko
wrote:
>
> Hello everyone,
>
> This email only tracks big items for xen.git tree. Please reply for items you
> wou
eap() debug-key function.
Based on original work from: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
---
v10:
- stated explicit dependency on CONFIG_LLC_COLORING for buddy-alloc-size
- fix for MISRA rule 20.7 parenthesis
v9:
- added ASSERT(order == 0) when freeing a color
Hi Michal,
On Wed, Nov 27, 2024 at 11:48 AM Michal Orzel wrote:
> On 19/11/2024 15:13, Carlo Nonato wrote:
> >
> >
> > Last Level Cache (LLC) coloring allows to partition the cache in smaller
> > chunks called cache colors.
> >
> > Since not all archite
This commit adds cache colors to the information dumped with the domain info
debug-key.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
xen/arch/arm/coloring.c | 16
xen/arch/arm/domain.c | 3 +++
xen/arch/arm/include/asm/coloring.h | 1
This commit adds a debug-key to let the user inspect the colored heap
information. The number of pages stored for each available color is dumped.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
xen/common/page_alloc.c | 24
1 file changed, 24 insertions
colors from physical addresses.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
docs/misc/arm/cache-coloring.rst | 112 ++
docs/misc/xen-command-line.pandoc| 22 +++
xen/arch/arm/Kconfig | 16 ++
xen/arch/arm/Makefile| 1
This reverts commit 0c18fb76323bfb13615b6f13c98767face2d8097.
Cache coloring support for Xen needs to relocate Xen code and data in a new
colored physical space. The BOOT_RELOC_VIRT_START will be used as the virtual
base address for a temporary mapping to this new space.
---
xen/arch/arm/include/
an RFC to address a problem with the switch_ttbr function.
For the moment I haven't considered it since it's still a work in progress.
Acknowledgements
This work is sponsored by Xilinx Inc., and supported by University of
Modena and Reggio Emilia and Minerva Systems.
not be created with the
directmap flag.
The latter instead frees allocated memory.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
docs/misc/arm/cache-coloring.rst| 7 ++--
xen/arch/arm/coloring.c | 56 +
xen/arch/arm/domain.c
This commit adds the "colors" Device Tree attribute that can be used for
DomUs and Dom0less color configurations. The syntax is the same used
for every color config.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
docs/misc/arm/cache-coloring.rst
initialization. This commit moves the Xen boot module after the coloring
initialization to allow the order of operations previously described to
take place.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
xen/arch/arm/setup.c | 12 ++--
1 file changed, 6 insertions(+), 6
nges.
Also documentation is added.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
docs/man/xl.cfg.5.pod.in | 10 ++
tools/libs/light/libxl_create.c | 12
tools/libs/light/libxl_types.idl | 1 +
tools/xl/xl_parse.c | 52 +
mapping for it that could be configured using some command line options.
In order to parse all the needed information from the device tree, we
need to revert the above commit and restore the previous order for
page-tables initialization.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
ng is enabled, this memory isn't
managed by the colored allocator.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
docs/misc/arm/cache-coloring.rst| 43 +-
docs/misc/xen-command-line.pandoc | 14 ++
xen/arch/arm/Kconfig| 12 ++
xen/arch/arm/
ff-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
docs/misc/arm/cache-coloring.rst | 8
docs/misc/xen-command-line.pandoc | 9 +
xen/arch/arm/coloring.c | 30 ++
3 files changed, 43 insertions(+), 4 deletions(-)
diff --git a/docs/mis
vmap, with the exception that it doesn't take for
granted that the physical memory is contiguous.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
xen/arch/arm/alternative.c | 5 ++
xen/arch/arm/coloring.c | 16
xen/arch/arm/include/asm/coloring.h
On Fri, Aug 26, 2022 at 4:13 PM Jan Beulich wrote:
> On 26.08.2022 14:51, Carlo Nonato wrote:
> > --- a/xen/common/page_alloc.c
> > +++ b/xen/common/page_alloc.c
> > @@ -605,6 +605,27 @@ static struct page_info
> *alloc_col_domheap_page(struct domai
Hi Julien,
On Sat, Sep 10, 2022 at 5:12 PM Julien Grall wrote:
>
> Hi Carlo,
>
> On 26/08/2022 13:50, Carlo Nonato wrote:
> > Shared caches in multi-core CPU architectures represent a problem for
> > predictability of memory access latency. This jeopardizes applicability
Hi Julien,
On Sat, Sep 10, 2022 at 4:01 PM Julien Grall wrote:
>
> Hi,
>
> On 26/08/2022 13:51, Carlo Nonato wrote:
> > From: Luca Miccio
> >
> > This reverts commit 48fb2a9deba11ee48dde21c5c1aa93b4d4e1043b.
> >
> > The cache coloring support has
Hi Julien,
On Sat, Sep 10, 2022 at 4:29 PM Julien Grall wrote:
>
> Hi Carlo,
>
> On 26/08/2022 13:51, Carlo Nonato wrote:
> > From: Luca Miccio
> >
> > This reverts commit 3a5d341681af650825bbe3bee9be5d187da35080.
>
> Usually, this indicates that this w
Hi Jan,
On Thu, Sep 15, 2022 at 3:13 PM Jan Beulich wrote:
>
> On 26.08.2022 14:51, Carlo Nonato wrote:
> > This commit adds a new memory page allocator that implements the cache
> > coloring mechanism. The allocation algorithm follows the given color
> > configu
Hi Jan,
On Thu, Sep 15, 2022 at 3:25 PM Jan Beulich wrote:
>
> On 26.08.2022 14:51, Carlo Nonato wrote:
> > --- a/xen/common/vmap.c
> > +++ b/xen/common/vmap.c
> > @@ -8,6 +8,9 @@
> > #include
> > #include
> > #include
> > +#ifdef CONFIG_CA
o remove ambiguity with too generic "colors". "llc" is also
shorter than "cache"
- reordered again patches since code is now splitted in common + arch
Carlo Nonato (8):
xen/common: add cache coloring common code
xen/arm: add cache coloring initialization
xen: ex
ation syntax for cache colors.
Signed-off-by: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
---
v4:
- dom0 colors are dynamically allocated as for any other domain
(colors are duplicated in dom0_colors and in the new array, but logic
is simpler)
---
docs/misc/arm/
This commit adds the "llc-colors" Device Tree attribute that can be used
for DomUs and Dom0less color configurations. The syntax is the same used
for every color config.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
docs/misc
the color
ranges.
Documentation is also added.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v4:
- removed overlapping color ranges checks during parsing
- moved hypercall buffer initialization in libxenctrl
---
docs/man/xl.cfg.5.pod.in
this patch, there are no implemented methods for actually
configuring cache colors for domains and all the configurations fall back
to the default one.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v4:
- added "llc-coloring&quo
This commit updates the domctl interface to allow the user to set cache
coloring configurations from the toolstack.
It also implements the functionality for arm64.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v4:
- updated
Xen needs to relocate Xen code and data in a new
colored physical space. The BOOT_RELOC_VIRT_START will be used as the virtual
base address for a temporary mapping to this new space.
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
xen/arch/arm/include/asm/config.h | 4 +++-
xen/arch
Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v4:
- Kconfig options moved to xen/arch
- removed range for CONFIG_NR_LLC_COLORS
- added "llc_coloring_enabled" global to later implement the boot-time
switch
- added domain_create_llc_colored() to be able to p
: Carlo Nonato
Signed-off-by: Marco Solieri
---
v4:
- fixed p2m page allocation using MEMF_no_owner memflag
---
xen/arch/arm/p2m.c | 11 +--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 948f199d84..f9faeb61af 100644
--- a/xen/arch
s enabled, this memory
isn't managed by the colored allocator.
Colored heap information is dumped in the dump_heap() debug-key function.
Signed-off-by: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
---
v4:
- moved colored allocator code after buddy allocator becau
et to one.
Signed-off-by: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
---
docs/misc/xen-command-line.pandoc | 10 ++
xen/arch/arm/llc_coloring.c | 30 ++
2 files changed, 40 insertions(+)
diff --git a/docs/misc/xen-co
pagetables()).
Finally, since the alternative framework needs to remap the Xen text and
inittext sections, this operation must be done in a coloring-aware way.
The function xen_remap_colored() is introduced for that.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Mar
Hi Jan,
On Mon, Jan 23, 2023 at 4:52 PM Jan Beulich wrote:
>
> On 23.01.2023 16:47, Carlo Nonato wrote:
> > Shared caches in multi-core CPU architectures represent a problem for
> > predictability of memory access latency. This jeopardizes applicability
> > of many A
Hi Jan, Julien
On Tue, Jan 24, 2023 at 5:37 PM Jan Beulich wrote:
>
> On 23.01.2023 16:47, Carlo Nonato wrote:
> > @@ -769,6 +776,13 @@ struct domain *domain_create(domid_t domid,
> > return ERR_PTR(err);
> > }
> >
> > +struct
On Wed, Jan 25, 2023 at 2:10 PM Jan Beulich wrote:
>
> On 25.01.2023 12:18, Carlo Nonato wrote:
> > On Tue, Jan 24, 2023 at 5:37 PM Jan Beulich wrote:
> >> On 23.01.2023 16:47, Carlo Nonato wrote:
> >>> --- /dev/null
> >>> +++ b/xen/i
Hi Jan,
On Tue, Jan 24, 2023 at 5:29 PM Jan Beulich wrote:
>
> On 23.01.2023 16:47, Carlo Nonato wrote:
> > @@ -275,6 +276,19 @@ unsigned int *dom0_llc_colors(unsigned int *num_colors)
> > return colors;
> > }
> >
> > +unsigned int *llc_colors_from_
Hi Jan,
On Tue, Jan 24, 2023 at 5:50 PM Jan Beulich wrote:
>
> On 23.01.2023 16:47, Carlo Nonato wrote:
> > From: Luca Miccio
> >
> > This commit adds a new memory page allocator that implements the cache
> > coloring mechanism. The allocation algorithm
Hi Julien,
On Thu, Jan 26, 2023 at 11:25 AM Julien Grall wrote:
>
> Hi Carlo,
>
> On 23/01/2023 15:47, Carlo Nonato wrote:
> > Cache colored domains can benefit from having p2m page tables allocated
> > with the same coloring schema so that isolation can be achieved al
Hi Julien and Jan,
On Thu, Jan 26, 2023 at 11:16 AM Julien Grall wrote:
>
> Hi Jan,
>
> On 26/01/2023 08:06, Jan Beulich wrote:
> > On 25.01.2023 17:18, Carlo Nonato wrote:
> >> On Wed, Jan 25, 2023 at 2:10 PM Jan Beulich wrote:
> >>> On 25.01.2023 12:18,
Hi Jan,
On Thu, Jan 26, 2023 at 8:25 AM Jan Beulich wrote:
>
> On 24.01.2023 17:29, Jan Beulich wrote:
> > On 23.01.2023 16:47, Carlo Nonato wrote:
> >> @@ -92,6 +92,10 @@ struct xen_domctl_createdomain {
> >> /* CPU pool to use; specify 0 or a specific exist
Hi Julien and Jan,
On Thu, Jan 26, 2023 at 11:21 AM Julien Grall wrote:
>
> Hi,
>
> On 25/01/2023 16:27, Carlo Nonato wrote:
> > On Tue, Jan 24, 2023 at 5:29 PM Jan Beulich wrote:
> >>
> >> On 23.01.2023 16:47, Carlo Nonato wrote:
> >>> @@
Hi Anthony,
On Thu, Jan 26, 2023 at 3:22 PM Anthony PERARD
wrote:
>
> On Mon, Jan 23, 2023 at 04:47:29PM +0100, Carlo Nonato wrote:
> > diff --git a/tools/libs/ctrl/xc_domain.c b/tools/libs/ctrl/xc_domain.c
> > index e939d07157..064f54c349 100644
> > --- a/tools/libs/ct
Hi Jan,
On Thu, Jan 26, 2023 at 5:29 PM Jan Beulich wrote:
>
> On 23.01.2023 16:47, Carlo Nonato wrote:
> > --- a/docs/misc/xen-command-line.pandoc
> > +++ b/docs/misc/xen-command-line.pandoc
> > @@ -299,6 +299,20 @@ can be maintained with the pv-shim mechanism.
>
alue passing.
See below for more comments.
I know that these two questions are very specific so let me know if something
is unclear.
On Sat, Oct 22, 2022 at 5:51 PM Carlo Nonato
wrote:
>
> This commit adds array pointers to domains as well as to the hypercall
> and configuration structur
On Mon, Nov 21, 2022 at 4:14 PM Jan Beulich wrote:
>
> On 21.11.2022 15:50, Carlo Nonato wrote:
> > Hi x86 devs,
>
> Any reason you didn't include Roger?
Nope. Sorry, forgot to add him.
> > I want to ask you some questions about this patch because in the previous
&
Hi Anthony,
On Thu, Nov 24, 2022 at 4:21 PM Anthony PERARD
wrote:
>
> On Sat, Oct 22, 2022 at 05:51:15PM +0200, Carlo Nonato wrote:
> > diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
> > index b2901e04cf..5f53cec8bf 100644
> > --- a/docs/man/xl.cfg.5.p
Hi Jan
On Wed, Dec 7, 2022 at 12:52 PM Jan Beulich wrote:
>
> On 22.10.2022 18:08, Carlo Nonato wrote:
> > This commit replaces the colored allocator for domains with a simple buddy
> > allocator indexed also by colors, so that it can allocate pages based on
> > som
Add a new domctl hypercall to allow the user to set LLC coloring
configurations. Colors can be set only once, just after domain creation,
since recoloring isn't supported.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v8:
- fixed m
extra before freeing new pages as this is
considered an error and can cause ASSERT violations.
Signed-off-by: Carlo Nonato
---
v8:
- fixed PGC_extra ASSERT fail in alloc_domheap_pages() by removing PGC_extra
before freeing
v7:
- PGC_preserved used also in mark_page_free()
v6:
- preserved_flags renam
allocation and cache coloring are incompatible because static
memory can't be guaranteed to use only colors assigned to the domain.
Panic during DomUs creation when both are enabled.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v8:
it
in Dom0 construction bring it back to domain_build.c and declare it in
domain_build.h.
Take the opportunity to adapt the implementation of allocate_memory() so
that it uses the host layout when called on the hwdom, via
find_unallocated_memory().
Signed-off-by: Carlo Nonato
---
v8:
- patch adap
essly partitions a cache memory that is already private, i.e.
underutilize it.
Signed-off-by: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
---
v8:
- added bound check on xen_colors in llc_coloring_init()
v7:
- removed XEN_DEFAULT_COLOR
- XEN_DEFAULT_NUM_COLORS is now used in
rarily available for relocation.
This implies that Xen protection must happen after the copy.
Finally, since the alternative framework needs to remap the Xen text and
inittext sections, this operation must be done in a coloring-aware way.
The function xen_remap_colored() is introduced for that.
eap() debug-key function.
Based on original work from: Luca Miccio
Signed-off-by: Marco Solieri
Signed-off-by: Carlo Nonato
---
v8:
- requests that uses MEMF_* flags that can't be served are now going to fail
- free_color_heap_page() is called directly from free_heap_pages
pport the static-mem feature.
The solution has been tested in several scenarios, including Xilinx Zynq
MPSoCs.
Carlo Nonato (12):
xen/common: add cache coloring common code
xen/arm: add initial support for LLC coloring on arm64
xen/arm: permit non direct-mapped Dom0 construction
xen/arm
umber of colors that fit in a 4 KiB page when integers
are 4 bytes long.
LLC colors are a property of the domain, so struct domain has to be extended.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v8:
- minor documentation fixes
- "ll
Add the "llc-colors" Device Tree attribute to express DomUs and Dom0less
color configurations.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v8:
- fixed memory leak on error path of domain_set_llc_colors_from_str()
- realloc co
2. Move it to mmu/setup.c and make it
non-static so that it can be used outside.
Signed-off-by: Carlo Nonato
---
v8:
- patch adapted to new changes to consider_modules()
v7:
- moved consider_modules() to arm/mmu/setup.c
v6:
- new patch
---
xen/arch/arm/arm32/mmu/mm.c
also when NUMA will be supported on Arm.
Signed-off-by: Carlo Nonato
Acked-by: Julien Grall
---
v8:
- no changes
v7:
- no changes
v6:
- Carlo Nonato as the only signed-off-by
v5:
- new patch
---
xen/arch/arm/mmu/p2m.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen
the color
ranges.
Documentation is also added.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v8:
- warn the user in case of coloring not supported at hypervisor level
v7:
- removed unneeded NULL check before xc_hypercall_buffer
mapping Dom0 isn't possible when coloring is enabled, so
CDF_directmap flag is removed when creating it.
Based on original work from: Luca Miccio
Signed-off-by: Carlo Nonato
Signed-off-by: Marco Solieri
---
v8:
- added bound check on dom0_num_colors
- default colors array set just on
Hi Jan,
On Mon, May 6, 2024 at 1:54 PM Jan Beulich wrote:
>
> On 02.05.2024 18:55, Carlo Nonato wrote:
> > --- a/xen/common/Kconfig
> > +++ b/xen/common/Kconfig
> > @@ -71,6 +71,9 @@ config HAS_IOPORTS
> > config HAS_KEXEC
> > bool
> >
&
Hi Jan,
On Mon, May 6, 2024 at 2:01 PM Jan Beulich wrote:
>
> On 02.05.2024 18:55, Carlo Nonato wrote:
> > Add a command line parameter to allow the user to set the coloring
> > configuration for Dom0.
> > A common configuration syntax for cache colors is introduced and
Hi Jan,
On Mon, May 6, 2024 at 2:22 PM Jan Beulich wrote:
>
> On 02.05.2024 18:55, Carlo Nonato wrote:
> > --- a/xen/common/page_alloc.c
> > +++ b/xen/common/page_alloc.c
> > @@ -159,6 +159,7 @@
> > #endif
> >
> > #define PGC_no_buddy_merge PGC_st
ere to have coloring
since there are locking primitives that provides sufficient isolation and so
the problem is not common.
On x86 instead, the functions that map memory into caches are not so
easy to
exploit to achieve isolation.
Thanks.
- Carlo Nonato
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