[PATCH v2 0/5] KVM: kvm_set_memory_region() cleanups

Sean Christopherson
2025-01-11T00:20:25Z

Cleanups related to kvm_set_memory_region(), salvaged from similar patches
that were flying around when we were sorting out KVM_SET_USER_MEMORY_REGION2.

And, hopefully, the KVM-internal memslots hardening will also be useful for
s390's ucontrol stuff (https://lore.kernel.org/all/Z4FJNJ3UND8LSJZz@google.com).

v2:
- Keep check_memory_region_flags() where it is. [Xiaoyao]
- Rework the changelog for the last patch to account for the change in
motiviation.
- Fix double spaces goofs. [Tao]
- Add a lockdep assertion in the x86 code, too. [Tao]

v1: https://lore.kernel.org/all/20240802205003.353672-1-seanjc@google.com

Sean Christopherson (5):
KVM: Open code kvm_set_memory_region() into its sole caller (ioctl()
API)
KVM: Assert slots_lock is held when setting memory regions
KVM: Add a dedicated API for setting KVM-internal memslots
KVM: x86: Drop double-underscores from __kvm_set_memory_region()
KVM: Disallow all flags for KVM-internal memslots

arch/x86/kvm/x86.c | 7 ++++---
include/linux/kvm_host.h | 8 +++-----
virt/kvm/kvm_main.c | 33 ++++++++++++++-------------------
3 files changed, 21 insertions(+), 27 deletions(-)

base-commit: 10b2c8a67c4b8ec15f9d07d177f63b563418e948
--
2.47.1.613.gc27f4b7a9f-goog