[PATCH v4 0/4] Move alloc/free_vcpu_struct() to common code

[Oleksii Kurochko <oleksii.kurochko@gmail.com>]

As it was suggested in [1] it would be better to allocate one page for struct
vcpu for all arch-es. To do that it is needed to align Arm code to allocate
one page (as there is a case(when CONFIG_NEW_VGIC=y) when Arm64 will require
to allocate two pages). As a result, the following patches for Arm have been
introduced:
 - [PATCH v2 1/4] xen/arm: optimize the size of struct vcpu
 - [PATCH v2 2/4] xen/arm: drop MAX_PAGES_PER_VCPU

This patches are dependency for:
 - [PATCH v2 3/4] xen: move alloc/free_vcpu_struct() to common code

Also, as a part of this patch series another clean up is done which makes
{alloc,free}_domain_struct() static.

[1] https://lore.kernel.org/xen-devel/f8a9be3a-a0c6-496a-806f-40760dca5aee@suse.com/T/#m275dfcbdccef0461fa9a8acef072403f18091768

CI: https://gitlab.com/xen-project/people/olkur/xen/-/pipelines/2230207975

---
Changes in v4:
 - Address the comments recieved for v3.
---
Changes in v3:
 - Come up with a different way to optimize struct vcpu for Arm.
 - Merge patches "[PATCH v2 2/4] xen/arm: drop MAX_PAGES_PER_VCPU]" and
   "[PATCH v2 4/4] xen/common: make {alloc,free}_domain_struct() static"
   together.
 - Clean up vcpu_vgic_free() a little bit.
---
Changes in v2:
 - Introduce new patches for Arm:
     - [PATCH v2 1/4] xen/arm: optimize the size of struct vcpu
     - [PATCH v2 2/4] xen/arm: drop MAX_PAGES_PER_VCPU
    to allocate one page for struct vcpu in common code for all the arch-es.
 - Introduce patch to clean up xen/domain.h a little bit:
     - [PATCH v2 4/4] xen/common: make {alloc,free}_domain_struct() static
 - Address the comments from v1:
     - [PATCH v2 3/4] xen: move alloc/free_vcpu_struct() to common code
---

Oleksii Kurochko (4):
  xen/arm: vcpu_vgic_free() updates
  xen/arm: optimize the size of struct vcpu
  xen: move alloc/free_vcpu_struct() to common code
  xen/common: make {alloc,free}_domain_struct() static

 xen/arch/arm/domain.c               | 32 ---------------
 xen/arch/arm/include/asm/new_vgic.h |  2 +-
 xen/arch/arm/include/asm/vgic.h     |  2 +-
 xen/arch/arm/vgic.c                 |  5 +--
 xen/arch/arm/vgic/vgic-init.c       |  9 ++++-
 xen/arch/ppc/stubs.c                | 10 -----
 xen/arch/riscv/stubs.c              | 10 -----
 xen/arch/x86/domain.c               | 24 -----------
 xen/arch/x86/include/asm/domain.h   | 12 ++++++
 xen/common/domain.c                 | 62 +++++++++++++++++++----------
 xen/include/xen/domain.h            |  8 ----
 11 files changed, 64 insertions(+), 112 deletions(-)

-- 
2.52.0