Hi Jan,
On 29/05/2024 08:24, Jan Beulich wrote:
On 17.05.2024 15:33, Roger Pau Monne wrote:
Hello,
The following series attempts to solve a shortcoming of HVM/PVH guests
with the lack of support for foreign mappings. Such lack of support
prevents using PVH based guests as stubdomains for example.
Add support in a way similar to how it's done on Arm, by iterating over
the p2m based on the maximum gfn.
Patch 2 is not strictly needed. Moving the enablement of altp2m from an
HVM param to a create domctl flag avoids any possible race with the HVM
param changing after it's been evaluated. Note the param can only be
set by the control domain, and libxl currently sets it at domain
create. Also altp2m enablement is different from activation, as
activation does happen during runtime of the domain.
Thanks, Roger.
Roger Pau Monne (3):
xen/x86: account number of foreign mappings in the p2m
xen/x86: enable altp2m at create domain domctl
xen/x86: remove foreign mappings from the p2m on teardown
Here, too, I'd like to ask whether to keep this as a candidate for 4.19, or
whether to postpone. Afaict what's still missing are Arm and tool chain acks
on patch 2.
Stefano already provided an Ack [1], so the Arm part is now covered.
I am also guessing you meant "tools change" rather than "tool chain".
Anthony is away at the moment. But this was reviewed by Juergen.
Oleksii also release-ack the series, so I think it would be fine to
merge it.
Cheers,
[1]
https://lore.kernel.org/xen-devel/8e9a563f1e0f45883502bc47c4942081a5d66e1a.ca...@gmail.com/T/#mdcb3e89046f817bd1b98190baa2b6d6b04e1ec05
Jan
CHANGELOG.md | 1 +
tools/libs/light/libxl_create.c | 23 +++++++++-
tools/libs/light/libxl_x86.c | 26 +++++------
tools/ocaml/libs/xc/xenctrl_stubs.c | 2 +-
xen/arch/arm/domain.c | 6 +++
xen/arch/x86/domain.c | 28 ++++++++++++
xen/arch/x86/hvm/hvm.c | 23 +++++++++-
xen/arch/x86/include/asm/p2m.h | 32 +++++++++-----
xen/arch/x86/mm/p2m-basic.c | 18 ++++++++
xen/arch/x86/mm/p2m.c | 68 +++++++++++++++++++++++++++--
xen/include/public/domctl.h | 20 ++++++++-
xen/include/public/hvm/params.h | 9 +---
12 files changed, 215 insertions(+), 41 deletions(-)
--
Julien Grall
