On Mon, Feb 24, 2020 at 9:13 AM Julien Grall wrote:
>
> Hi Tamas,
>
> On 21/02/2020 18:49, Tamas K Lengyel wrote:
> > +int libxl_domain_fork_vm(libxl_ctx *ctx, uint32_t pdomid, uint32_t *domid)
> > +{
> > +int rc;
> > +struct xen_domctl_createdomain
On Mon, Feb 24, 2020 at 8:13 AM Roger Pau Monné wrote:
>
> On Fri, Feb 21, 2020 at 10:49:22AM -0800, Tamas K Lengyel wrote:
> > Implement hypercall that allows a fork to shed all memory that got allocated
> > for it during its execution and re-load its vCPU context
On Mon, Feb 24, 2020 at 5:39 AM Roger Pau Monné wrote:
>
> On Fri, Feb 21, 2020 at 10:49:21AM -0800, Tamas K Lengyel wrote:
> > VM forking is the process of creating a domain with an empty memory space
> > and a
> > parent domain specified from which to populate t
On Mon, Feb 24, 2020 at 8:42 AM Roger Pau Monné wrote:
>
> On Mon, Feb 24, 2020 at 08:35:09AM -0700, Tamas K Lengyel wrote:
> > On Mon, Feb 24, 2020 at 8:13 AM Roger Pau Monné
> > wrote:
> > >
> > > On Fri, Feb 21, 2020 at 10:49:22AM -0800, Tamas K Lengye
> >> In such a case, please put in a comment explaining why failure is
> >> impossible. In the general case e.g. a 2Mb page may need splitting,
> >> which may yield -ENOMEM. Such a comment will then also be useful in
> >> case a new failure mode gets added to ->set_entry(), where it then
> >> will
> > Note also that during a restore the guest is aware of such process,
> > and will know that it needs to re-register some stuff, but that's not
> > the case when forking, since the guest is not aware you need to make
> > sure everything is in place. There are also the grant table pages,
> >
> diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c
> index 3835bc928f..c14a724c6d 100644
> --- a/xen/arch/x86/mm/mem_sharing.c
> +++ b/xen/arch/x86/mm/mem_sharing.c
> @@ -842,7 +842,7 @@ static int nominate_page(struct domain *d, gfn_t gfn,
>
> /* Skip xen heap pages
Add necessary bits to implement "xl fork-vm" commands. The command allows the
user to specify how to launch the device model allowing for a late-launch model
in which the user can execute the fork without the device model and decide to
only later launch it.
Signed-off-by: Tamas
-by: Tamas K Lengyel
---
v11: Fully copy vcpu_info pages
Setup vcpu_runstate for forks
Added TODO note for PV timers
Copy shared_info page
Add copy_settings function, to be shared with fork_reset in the next patch
---
xen/arch/x86/domain.c | 11 +
xen/arch/x86/hvm
about a 2x
speedup during normal fuzzing operations. Performance may vary depending how
much memory got allocated for the forked VM. If it has been completely
deduplicated from the parent VM then creating a new fork would likely be more
performant.
Signed-off-by: Tamas K Lengyel
---
v11: use
-2 implements the VM fork & reset operation hypervisor side bits
Patch 3 adds the toolstack-side code implementing VM forking and reset
Tamas K Lengyel (3):
xen/mem_sharing: VM forking
x86/mem_sharing: reset a fork
xen/tools: VM forking toolstack side
docs/man/xl.1.pod.in | 44 +
On Wed, Feb 26, 2020 at 9:10 AM Roger Pau Monné wrote:
>
> On Wed, Feb 26, 2020 at 08:58:05AM -0700, Tamas K Lengyel wrote:
> > On Wed, Feb 26, 2020 at 8:36 AM Roger Pau Monné
> > wrote:
> > >
> > > On Wed, Feb 26, 2020 at 08:20:30AM -0700, Tamas K Le
On Wed, Feb 26, 2020 at 8:36 AM Roger Pau Monné wrote:
>
> On Wed, Feb 26, 2020 at 08:20:30AM -0700, Tamas K Lengyel wrote:
> > > > +static int populate_special_pages(struct domain *cd)
> > > > +{
> > > > +struct p2m_domain *p2m = p2m_get_hostp2m(c
On Wed, Feb 26, 2020 at 9:17 AM Tamas K Lengyel wrote:
>
> On Wed, Feb 26, 2020 at 9:10 AM Roger Pau Monné wrote:
> >
> > On Wed, Feb 26, 2020 at 08:58:05AM -0700, Tamas K Lengyel wrote:
> > > On Wed, Feb 26, 2020 at 8:36 AM Roger Pau Monné
> > > wrote:
On Mon, Feb 24, 2020 at 9:30 AM Julien Grall wrote:
>
> Hi,
>
> On 24/02/2020 16:19, Tamas K Lengyel wrote:
> > On Mon, Feb 24, 2020 at 9:13 AM Julien Grall wrote:
> >>
> >> Hi Tamas,
> >>
> >> On 21/02/2020 18:49, Tamas K Lengyel wrote:
&g
These functions don't belong in the common mem_access header as there is no #VE
equivalent on ARM.
Signed-off-by: Tamas K Lengyel
---
xen/include/asm-x86/mem_access.h | 10 ++
xen/include/xen/mem_access.h | 10 --
2 files changed, 10 insertions(+), 10 deletions(-)
diff
On Fri, Jan 24, 2020 at 6:57 AM Andrew Cooper wrote:
>
> On 24/01/2020 13:56, Tamas K Lengyel wrote:
> > These functions don't belong in the common mem_access header as there is no
> > #VE
> > equivalent on ARM.
> >
> > Signed-off-by: Tamas K Lengyel
&
On Fri, Jan 24, 2020 at 5:50 AM Jan Beulich wrote:
>
> On 24.01.2020 11:05, George Dunlap wrote:
> > On 1/24/20 8:51 AM, Jan Beulich wrote:
> >> Each of these commits introduced a function prototype referencing a
> >> structure which hadn't at least been forward declared. Add such
> >>
On Wed, Jan 29, 2020 at 6:27 AM Jan Beulich wrote:
>
> On 28.01.2020 18:02, Tamas K Lengyel wrote:
> > On Tue, Jan 28, 2020 at 9:56 AM Jan Beulich wrote:
> >>
> >> On 27.01.2020 19:06, Tamas K Lengyel wrote:
> >>> When plugging a hole in the targ
On Wed, Jan 29, 2020 at 7:44 AM Jan Beulich wrote:
>
> On 29.01.2020 15:05, Tamas K Lengyel wrote:
> > On Wed, Jan 29, 2020 at 6:27 AM Jan Beulich wrote:
> >>
> >> On 28.01.2020 18:02, Tamas K Lengyel wrote:
> >>> On Tue, Jan 28, 2020 at 9:56 AM Jan Beul
> === x86 ===
VM forking series is at v6
Tamas
___
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
On Wed, Jan 29, 2020 at 6:10 AM Jan Beulich wrote:
>
> On 27.01.2020 19:06, Tamas K Lengyel wrote:
> > Use __get_gfn_type_access instead of p2m->get_entry to trigger page-forking
> > when the mem_access permission is being set on a page that has not yet been
> >
On Wed, Jan 29, 2020 at 7:05 AM Tamas K Lengyel
wrote:
>
> On Wed, Jan 29, 2020 at 6:27 AM Jan Beulich wrote:
> >
> > On 28.01.2020 18:02, Tamas K Lengyel wrote:
> > > On Tue, Jan 28, 2020 at 9:56 AM Jan Beulich wrote:
> > >>
> > >> On 27
Add necessary bits to implement "xl fork-vm" commands. The command allows the
user to specify how to launch the device model allowing for a late-launch model
in which the user can execute the fork without the device model and decide to
only later launch it.
Signed-off-by: Tamas
Using XENLOG_ERR level since this is only used in debug paths (ie. it's
expected the user already has loglvl=all set). Also use %pd to print the domain
ids.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm/mem_sharing.c | 82 +--
1 file changed, 41 insertions
before (or
even completely without) the toolstack.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm/hap/hap.c | 3 +--
xen/include/asm-x86/hap.h | 1 +
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
index 3d93f3451c..c7c7ff6e99
-by: Tamas K Lengyel
---
v6: use get_domain/put_domain on parent to make sure it's not destroyed
---
xen/arch/x86/domain.c | 11 ++
xen/arch/x86/hvm/hvm.c| 2 +-
xen/arch/x86/mm/mem_sharing.c | 222 ++
xen/arch/x86/mm/p2m.c | 11
When plugging a hole in the target physmap don't use the access permission
returned by __get_gfn_type_access as it can be non-sensical, leading to
spurious vm_events being sent out for access violations at unexpected
locations. Make use of p2m->default_access instead.
Signed-off-by: Tama
about a 2x
speedup during normal fuzzing operations. Performance may vary depending how
much memory got allocated for the forked VM. If it has been completely
deduplicated from the parent VM then creating a new fork would likely be more
performant.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm
Currently the hvm parameters are only accessible via the HVMOP hypercalls. In
this patch we introduce a new function that can copy both the hvm context and
parameters directly into a target domain. No functional changes in existing
code.
Signed-off-by: Tamas K Lengyel
---
v6: finish addressing
Use __get_gfn_type_access instead of p2m->get_entry to trigger page-forking
when the mem_access permission is being set on a page that has not yet been
copied over from the parent.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm/mem_access.c | 5 ++---
1 file changed, 2 insertions(+)
The owner domain of shared pages is dom_cow, use that for get_page
otherwise the function fails to return the correct page. Fixing the
error now and simplifying the checks since we can't have any shared
entries with dom_cow being NULL.
Signed-off-by: Tamas K Lengyel
---
v6: use simplified check
the VM fork reset operation hypervisor side bits.
Patch 9 adds the toolstack-side code implementing VM forking and reset.
Tamas K Lengyel (9):
x86/hvm: introduce hvm_copy_context_and_params
xen/x86: Make hap_get_allocation accessible
x86/p2m: Allow p2m_get_page_from_gfn to return shared entr
On Wed, Jan 29, 2020 at 7:56 AM Tamas K Lengyel
wrote:
>
> On Wed, Jan 29, 2020 at 7:44 AM Jan Beulich wrote:
> >
> > On 29.01.2020 15:05, Tamas K Lengyel wrote:
> > > On Wed, Jan 29, 2020 at 6:27 AM Jan Beulich wrote:
> > >>
> > >> On 28.0
On Wed, Jan 29, 2020 at 9:09 AM Tamas K Lengyel
wrote:
>
> On Wed, Jan 29, 2020 at 7:56 AM Tamas K Lengyel
> wrote:
> >
> > On Wed, Jan 29, 2020 at 7:44 AM Jan Beulich wrote:
> > >
> > > On 29.01.2020 15:05, Tamas K Lengyel wrote:
> > > >
: Roger Pau Monné
> CC: Ian Jackson
> CC: Razvan Cojocaru
> CC: Tamas K Lengyel
>
> Tamas: You introduced xc_hvm_param_deprecated_check() in 0a246b41ca while
> introducing XEN_DOMCTL_monitor_op. Do you recall why?
Well, from the looks of it the intent was to tell any remainin
On Mon, Feb 3, 2020 at 9:24 AM Jan Beulich wrote:
>
> On 03.02.2020 17:12, Tamas K Lengyel wrote:
> > The owner domain of shared pages is dom_cow, use that for get_page
> > otherwise the function fails to return the correct page under some
> > situations. The check i
-by: Tamas K Lengyel
---
xen/arch/x86/domain.c | 11 ++
xen/arch/x86/hvm/hvm.c| 2 +-
xen/arch/x86/mm/mem_sharing.c | 221 ++
xen/arch/x86/mm/p2m.c | 11 +-
xen/include/asm-x86/mem_sharing.h | 17 +++
xen/include/public/memory.h
Add necessary bits to implement "xl fork-vm" commands. The command allows the
user to specify how to launch the device model allowing for a late-launch model
in which the user can execute the fork without the device model and decide to
only later launch it.
Signed-off-by: Tamas
about a 2x
speedup during normal fuzzing operations. Performance may vary depending how
much memory got allocated for the forked VM. If it has been completely
deduplicated from the parent VM then creating a new fork would likely be more
performant.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm
n be committed out-of-order
Patch 1 is a bugfix in existing code in p2m
Patch 2-3 implement changes to make forking possible
Patch 4 is a bugfix in mem_sharing
Patch 5-6 implements the VM fork and reset operation hypervisor side bits
Patch 7 adds the toolstack-side code implementing VM forking and r
before (or
even completely without) the toolstack.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm/hap/hap.c | 3 +--
xen/include/asm-x86/hap.h | 1 +
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
index 3d93f3451c..c7c7ff6e99
any shared entries with dom_cow being NULL.
Signed-off-by: Tamas K Lengyel
---
v7: update commit message
---
xen/arch/x86/mm/p2m.c | 14 --
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index def13f657b..007fef720d 100644
Currently the hvm parameters are only accessible via the HVMOP hypercalls. In
this patch we introduce a new function that can copy both the hvm context and
parameters directly into a target domain.
Signed-off-by: Tamas K Lengyel
---
v7: get rid of goto's during code-movement as requested by Jan
of
p2m->default_access instead and document the ambiguity surrounding "hole"
types and corner-cases with custom mem_access being set on holes.
Signed-off-by: Tamas K Lengyel
---
v7: add detailed comment explaining the issue and why this fix is correct
---
xen/arch/x86/mm/mem_s
On Fri, Feb 7, 2020 at 10:16 AM Tamas K Lengyel wrote:
>
> On Fri, Feb 7, 2020 at 9:54 AM Jan Beulich wrote:
> >
> > On 07.02.2020 10:52, Roger Pau Monné wrote:
> > > On Fri, Feb 07, 2020 at 09:08:15AM +0100, Jan Beulich wrote:
> > >> On 06.02.2020 16:2
On Fri, Feb 7, 2020 at 9:54 AM Jan Beulich wrote:
>
> On 07.02.2020 10:52, Roger Pau Monné wrote:
> > On Fri, Feb 07, 2020 at 09:08:15AM +0100, Jan Beulich wrote:
> >> On 06.02.2020 16:20, Jan Beulich wrote:
> >>> --- a/xen/arch/x86/hvm/vmx/vmx.c
> >>> +++ b/xen/arch/x86/hvm/vmx/vmx.c
> >>> @@
On Thu, Jan 23, 2020 at 9:44 AM George Dunlap wrote:
>
> On 1/22/20 5:08 PM, Tamas K Lengyel wrote:
> > On Wed, Jan 22, 2020 at 8:35 AM Jan Beulich wrote:
> >>
> >> On 21.01.2020 18:49, Tamas K Lengyel wrote:
> >>> When plugging a hole in the targ
Hi all,
I just wanted to bring it to the community's attention that I've upped
Valgrind's Xen support to include everything up to Xen 4.13. It's now
merged and will be part of the next Valgrind release:
https://sourceware.org/git/?p=valgrind.git;a=commit;h=c88133141a354d65568fb85037abc5e1f74ce46b
On Thu, Jan 23, 2020 at 8:32 AM George Dunlap wrote:
>
> On 1/22/20 4:55 PM, Jan Beulich wrote:
> > On 22.01.2020 17:51, Tamas K Lengyel wrote:
> >> On Wed, Jan 22, 2020 at 8:23 AM Jan Beulich wrote:
> >>>
> >>> On 21.01.2020 18:49, Tamas K Lengyel w
On Thu, Jan 23, 2020 at 9:14 AM George Dunlap wrote:
>
> On 1/21/20 5:49 PM, Tamas K Lengyel wrote:
> > MEM_SHARING_DESTROY_GFN is used on the 'flags' bitfield during unsharing.
> > However, the bitfield is not used for anything else, so just convert it to a
> > bool ins
On Thu, Jan 23, 2020 at 10:21 AM George Dunlap wrote:
>
> On 1/21/20 5:49 PM, Tamas K Lengyel wrote:
> > VM forking is the process of creating a domain with an empty memory space
> > and a
> > parent domain specified from which to populate the memory when necessary.
&g
> > Signed-off-by: Alexandru Isaila
> > Acked-by: Tamas K Lengyel
>
> Something in this series broke the ARM build. Sorry, but I don't have
> any further time to investigate.
>
> gcc -DBUILD_ID -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes
> -Wdeclaratio
> +if ( !(rc = hvm_copy_context_and_params(d, cd)) )
I just realized that I forgot to swap the order of the parameters here
after the requested change was made in the prereq patch introducing
the function.
Tamas
___
Xen-devel mailing list
On Tue, Jan 28, 2020 at 9:48 AM Jan Beulich wrote:
>
> On 27.01.2020 19:06, Tamas K Lengyel wrote:
> > @@ -4139,49 +4140,32 @@ static int hvm_allow_set_param(struct domain *d,
> > return rc;
> > }
> >
> > -static int hvmop_set_param(
> > -X
On Tue, Jan 28, 2020 at 9:59 AM Jan Beulich wrote:
>
> On 28.01.2020 17:54, Tamas K Lengyel wrote:
> > On Tue, Jan 28, 2020 at 9:48 AM Jan Beulich wrote:
> >>
> >> On 27.01.2020 19:06, Tamas K Lengyel wrote:
> >>> @@ -4139,49 +4140,32 @@ stati
On Tue, Jan 28, 2020 at 9:56 AM Jan Beulich wrote:
>
> On 27.01.2020 19:06, Tamas K Lengyel wrote:
> > When plugging a hole in the target physmap don't use the access permission
> > returned by __get_gfn_type_access as it can be non-sensical, leading to
> > spurious
On Tue, Jan 28, 2020 at 9:38 AM Jan Beulich wrote:
>
> On 27.01.2020 19:06, Tamas K Lengyel wrote:
> > --- a/xen/arch/x86/mm/p2m.c
> > +++ b/xen/arch/x86/mm/p2m.c
> > @@ -574,11 +574,12 @@ struct page_info *p2m_get_page_from_gfn(
> >
On Wed, Feb 5, 2020 at 4:40 AM Jan Beulich wrote:
>
> On 03.02.2020 17:12, Tamas K Lengyel wrote:
> > @@ -4414,6 +4424,40 @@ static int hvm_allow_get_param(struct domain *d,
> > return rc;
> > }
> >
> > +static int hvm_get_param(struct domain
On Wed, Feb 19, 2020 at 2:19 AM Alexandru Stefan ISAILA
wrote:
>
> At this moment a guest can call vmfunc to change the altp2m view. This
> should be limited in order to avoid any unwanted view switch.
>
> The new xc_altp2m_set_visibility() solves this by making views invisible
> to vmfunc.
>
On Mon, Feb 10, 2020 at 11:46 AM Andrew Cooper
wrote:
>
> ARM currently has no restrictions on toolstack and guest access to the entire
> HVM_PARAM block. As the paging/monitor/sharing features aren't under security
> support, this doesn't need an XSA.
There is no paging or sharing
On Tue, Feb 11, 2020 at 2:17 AM Jan Beulich wrote:
>
> On 10.02.2020 20:21, Tamas K Lengyel wrote:
> > The owner domain of shared pages is dom_cow, use that for get_page
> > otherwise the function fails to return the correct page under some
> > situations. The check i
On Tue, Feb 11, 2020 at 4:04 AM Jan Beulich wrote:
>
> On 11.02.2020 11:29, Tamas K Lengyel wrote:
> > On Tue, Feb 11, 2020 at 2:17 AM Jan Beulich wrote:
> >>
> >> On 10.02.2020 20:21, Tamas K Lengyel wrote:
> >>> The owner domain of shared pages is dom_
Add necessary bits to implement "xl fork-vm" commands. The command allows the
user to specify how to launch the device model allowing for a late-launch model
in which the user can execute the fork without the device model and decide to
only later launch it.
Signed-off-by: Tamas
before (or
even completely without) the toolstack.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm/hap/hap.c | 3 +--
xen/include/asm-x86/hap.h | 1 +
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
index 3d93f3451c..c7c7ff6e99
-by: Tamas K Lengyel
---
v9: remove stale header
fix tsc incarnation being bumped on set
---
xen/arch/x86/domain.c | 11 ++
xen/arch/x86/hvm/hvm.c| 2 +-
xen/arch/x86/mm/mem_sharing.c | 222 ++
xen/arch/x86/mm/p2m.c | 11
domctl
so that Xen can copy the setting without the extra toolstack queries.
Signed-off-by: Tamas K Lengyel
---
xen/common/domctl.c | 14 ++
xen/include/public/domctl.h | 3 ++-
2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/xen/common/domctl.c b/xen/common
about a 2x
speedup during normal fuzzing operations. Performance may vary depending how
much memory got allocated for the forked VM. If it has been completely
deduplicated from the parent VM then creating a new fork would likely be more
performant.
Signed-off-by: Tamas K Lengyel
---
xen/arch/x86/mm
out by Andrew
Patch 1 exposes a hap internal function that will be used during VM forking
Patch 2 extends the createdomain domctl with an extra used during VM forking
Patch 3-4 implements the VM fork & reset operation hypervisor side bits
Patch 5 adds the toolstack-side code implemen
On Fri, Feb 21, 2020 at 10:47 AM Andrew Cooper
wrote:
>
> On 21/02/2020 17:07, Tamas K Lengyel wrote:
> > On Fri, Feb 21, 2020 at 7:42 AM Andrew Cooper
> > wrote:
> >> On 10/02/2020 19:21, Tamas K Lengyel wrote:
> >>> +static int mem_sharing_f
On Fri, Feb 21, 2020 at 3:34 PM Julien Grall wrote:
>
> Hi Tamas,
>
> On 21/02/2020 21:35, Tamas K Lengyel wrote:
> > On Fri, Feb 21, 2020 at 2:03 PM Julien Grall wrote:
> >>
> >> Hi Tamas,
> >>
> >> On 21/02/2020 18:49, Tamas K Lengyel
On Fri, Feb 21, 2020 at 2:03 PM Julien Grall wrote:
>
> Hi Tamas,
>
> On 21/02/2020 18:49, Tamas K Lengyel wrote:
> > When creating a domain that will be used as a VM fork some information is
> > required to set things up properly, like the max_vcpus count. Instead of
> One question needing considering is whether such a hypercall could in
> theory be useful without the mem_sharing infrastructure, or not. (i.e.
> how tightly integrated we should aim for.)
It would be possible to create domain forks without mem_sharing. The
mem_sharing part just adds an extra
On Fri, Feb 21, 2020 at 7:42 AM Andrew Cooper wrote:
>
> On 10/02/2020 19:21, Tamas K Lengyel wrote:
> > +static int mem_sharing_fork(struct domain *d, struct domain *cd)
> > +{
> > +int rc = -EINVAL;
> > +
> > +if ( !cd->controll
On Fri, Feb 21, 2020 at 4:18 PM Julien Grall wrote:
>
> On Fri, 21 Feb 2020 at 22:53, Tamas K Lengyel
> wrote:
> >
> > On Fri, Feb 21, 2020 at 3:34 PM Julien Grall wrote:
> > >
> > > Hi Tamas,
> > >
> > > On 21/02/2020 21:35, Tamas
On Fri, Feb 21, 2020 at 6:49 AM Andrew Cooper wrote:
>
> On 10/02/2020 19:21, Tamas K Lengyel wrote:
> > The owner domain of shared pages is dom_cow, use that for get_page
> > otherwise the function fails to return the correct page under some
> > situations. The check i
On Fri, Feb 21, 2020 at 7:02 AM Andrew Cooper wrote:
>
> On 21/02/2020 13:43, Andrew Cooper wrote:
> > On 10/02/2020 19:21, Tamas K Lengyel wrote:
> >> diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c
> >> index 3835bc928f..ccf338918d 100
On Fri, Jan 10, 2020 at 10:59 AM Andrew Cooper
wrote:
>
> On 10/01/2020 02:30, Tamas K Lengyel wrote:
> > The library has been largely untouched for over a decade at this point, it
> > is
> > undocumented and it's unclear what it was originally used for. Remove it
>
On Thu, Jan 9, 2020 at 3:29 AM Julien Grall wrote:
>
> Hi Tamas,
>
> On 08/01/2020 17:14, Tamas K Lengyel wrote:
> > +static int mem_sharing_fork(struct domain *d, struct domain *cd)
> > +{
> > +int rc;
> > +
> > +if ( !d-&g
On Thu, Jan 9, 2020 at 8:34 AM Jan Beulich wrote:
>
> On 09.01.2020 16:10, Roger Pau Monné wrote:
> > On Thu, Jan 09, 2020 at 06:41:12AM -0700, Tamas K Lengyel wrote:
> >> On Thu, Jan 9, 2020 at 3:29 AM Julien Grall wrote:
> >>>
> >>> Hi Tamas,
>
On Thu, Jan 9, 2020 at 9:03 AM Jan Beulich wrote:
>
> On 09.01.2020 16:57, Tamas K Lengyel wrote:
> > On Thu, Jan 9, 2020 at 8:34 AM Jan Beulich wrote:
> >>
> >> On 09.01.2020 16:10, Roger Pau Monné wrote:
> >>> On Thu, Jan 09, 2020 at 06:41:12AM -0700,
On Thu, Jan 9, 2020 at 8:10 AM Roger Pau Monné wrote:
>
> On Thu, Jan 09, 2020 at 06:41:12AM -0700, Tamas K Lengyel wrote:
> > On Thu, Jan 9, 2020 at 3:29 AM Julien Grall wrote:
> > >
> > > Hi Tamas,
> > >
> > > On 08/01/2020 17:14, Tamas K Len
On Thu, Jan 9, 2020 at 2:48 AM Roger Pau Monné wrote:
>
> On Wed, Jan 08, 2020 at 12:51:35PM -0700, Tamas K Lengyel wrote:
> > On Wed, Jan 8, 2020 at 11:37 AM Roger Pau Monné
> > wrote:
> > >
> > > On Wed, Jan 08, 2020 at 11:14:46AM -0700, Tamas K Lengye
On Thu, Jan 16, 2020 at 8:23 AM Jan Beulich wrote:
>
> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> > Create struct mem_sharing_domain under hvm_domain and move mem sharing
> > variables into it from p2m_domain and hvm_domain.
> >
> > Expose the mem_sharing_enabled
On Thu, Jan 16, 2020 at 9:18 AM Jan Beulich wrote:
>
> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> > It is wasteful to require separate hypercalls to enable sharing on both the
> > parent and the client domain during VM forking. To speed things up we enable
> > sh
On Thu, Jan 16, 2020 at 5:28 AM Jan Beulich wrote:
>
> On 08.01.2020 18:13, Tamas K Lengyel wrote:
> > @@ -4129,49 +4130,32 @@ static int hvm_allow_set_param(struct domain *d,
> > return rc;
> > }
> >
> > -static int hvmop_set_param(
> > -X
On Thu, Jan 16, 2020 at 7:55 AM Jan Beulich wrote:
>
> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> > @@ -1702,11 +1703,14 @@ int hvm_hap_nested_page_fault(paddr_t gpa, unsigned
> > long gla,
> > struct domain *currd = curr->domain;
> > struct p2m_do
On Thu, Jan 16, 2020 at 8:47 AM Jan Beulich wrote:
>
> On 08.01.2020 18:13, Tamas K Lengyel wrote:
> > Tamas K Lengyel (18):
> > x86/hvm: introduce hvm_copy_context_and_params
> > xen/x86: Make hap_get_allocation accessible
> > x86/mem_sharing: make get_two
On Thu, Jan 16, 2020 at 9:07 AM Jan Beulich wrote:
>
> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> > Signed-off-by: Tamas K Lengyel
> > ---
> > xen/arch/x86/mm/mem_sharing.c | 42 +--
> > 1 file changed, 21 insertions(+), 21 d
On Wed, Jan 22, 2020 at 8:35 AM Jan Beulich wrote:
>
> On 21.01.2020 18:49, Tamas K Lengyel wrote:
> > When plugging a hole in the target physmap don't use the access permission
> > returned by __get_gfn_type_access as it can be non-sensical,
>
> "can be" is to
On Wed, Jan 22, 2020 at 8:23 AM Jan Beulich wrote:
>
> On 21.01.2020 18:49, Tamas K Lengyel wrote:
> > The owner domain of shared pages is dom_cow, use that for get_page
> > otherwise the function fails to return the correct page.
>
> I think this description needs improv
On Wed, Jan 22, 2020 at 8:30 AM Jan Beulich wrote:
>
> On 21.01.2020 18:49, Tamas K Lengyel wrote:
> > @@ -538,24 +535,26 @@ static int audit(void)
> > d = get_domain_by_id(g->domain);
> > if ( d == NULL )
> > {
>
On Wed, Jan 22, 2020 at 8:01 AM Jan Beulich wrote:
>
> On 21.01.2020 18:49, Tamas K Lengyel wrote:
> > Currently the hvm parameters are only accessible via the HVMOP hypercalls.
> > In
> > this patch we introduce a new function that can copy both the hvm context
> &g
On Fri, Jan 17, 2020 at 4:15 AM Anthony PERARD
wrote:
>
> On Fri, Jan 17, 2020 at 10:12:14AM +0100, Jan Beulich wrote:
> > Please note that my previous mail was _to_ George, with you only
> > _cc_-ed. Hence the question was to George, not you. (It is a
> > common issue which I keep mentioning on
> > Provided this is v4 now of the series and no issues
> > were raised so far for these particular patches they can be merged
> > with your Reviewed-by.
>
> I don't think so, under the current (sufficiently) common
> understanding of the rules. See George's proposal to change to a
> model like
On Fri, Jan 17, 2020 at 2:23 AM Jan Beulich wrote:
>
> On 16.01.2020 17:12, Tamas K Lengyel wrote:
> > On Thu, Jan 16, 2020 at 9:07 AM Jan Beulich wrote:
> >>
> >> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> >>> Signed-off-by: Tamas K Lengyel
>
ed-off-by: Alexandru Isaila
> Acked-by: Jan Beulich
For the mem_access bits:
Acked-by: Tamas K Lengyel
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On Mon, Jan 20, 2020 at 9:34 AM Jan Beulich wrote:
>
> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> > --- a/xen/arch/x86/mm/mem_sharing.c
> > +++ b/xen/arch/x86/mm/mem_sharing.c
> > @@ -652,19 +652,18 @@ static int page_make_sharable(struct domain *d,
&g
On Mon, Jan 20, 2020 at 9:23 AM Jan Beulich wrote:
>
> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> > Trying to share these would fail anyway, better to skip them early.
> >
> > Signed-off-by: Tamas K Lengyel
>
> Reviewed-by: Jan Beulich
> albeit I w
On Wed, Jan 8, 2020 at 7:58 AM George Dunlap wrote:
>
> On 12/30/19 4:11 PM, Tamas K Lengyel wrote:
> > The following series implements VM forking for Intel HVM guests to allow for
> > the fast creation of identical VMs without the assosciated high startup
> > costs
>
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