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. 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(-) >
