[PATCH v2 0/5] KVM: Export KVM-internal symbols for sub-modules only

Sean Christopherson
2025-09-19T00:33:14Z

Use the newfangled EXPORT_SYMBOL_FOR_MODULES() along with some macro
shenanigans to export KVM-internal symbols if and only if KVM has one or
more sub-modules, and only for those sub-modules, e.g. x86's kvm-amd.ko
and/or kvm-intel.ko.

Patch 5 gives KVM x86 the full treatment. If anyone wants to tackle PPC,
it should be doable to restrict KVM PPC's exports as well.

Based on kvm-x86. My plan is to take this through the KVM x86 tree as there's
an annoying conflict with an in-flight patch, and except for the vfio-ap
change that's been acked, PPC is the only other architecture that's at all
affected, and KVM PPC is maintained separately.

v2:
- Omit the x86 patch, for now.
- Drop "GPL" from KVM's macro to match EXPORT_SYMBOL_FOR_MODULES. [Vlastimil]

v1: https://lkml.kernel.org/r/20250729174238.593070-1-seanjc%40google.com

Sean Christopherson (5):
KVM: s390/vfio-ap: Use kvm_is_gpa_in_memslot() instead of open coded
equivalent
KVM: Export KVM-internal symbols for sub-modules only
KVM: x86: Move kvm_intr_is_single_vcpu() to lapic.c
KVM: x86: Drop pointless exports of kvm_arch_xxx() hooks
KVM: x86: Export KVM-internal symbols for sub-modules only

arch/powerpc/include/asm/kvm_types.h | 15 ++
arch/s390/include/asm/kvm_host.h | 2 +
arch/s390/kvm/priv.c | 8 +
arch/x86/include/asm/kvm_host.h | 3 -
arch/x86/include/asm/kvm_types.h | 10 ++
arch/x86/kvm/cpuid.c | 10 +-
arch/x86/kvm/hyperv.c | 4 +-
arch/x86/kvm/irq.c | 34 +----
arch/x86/kvm/kvm_onhyperv.c | 6 +-
arch/x86/kvm/lapic.c | 71 ++++++---
arch/x86/kvm/lapic.h | 4 +-
arch/x86/kvm/mmu/mmu.c | 36 ++---
arch/x86/kvm/mmu/spte.c | 10 +-
arch/x86/kvm/mmu/tdp_mmu.c | 2 +-
arch/x86/kvm/pmu.c | 10 +-
arch/x86/kvm/smm.c | 2 +-
arch/x86/kvm/x86.c | 219 +++++++++++++--------------
drivers/s390/crypto/vfio_ap_ops.c | 2 +-
include/linux/kvm_types.h | 25 ++-
virt/kvm/eventfd.c | 2 +-
virt/kvm/guest_memfd.c | 4 +-
virt/kvm/kvm_main.c | 128 ++++++++--------
22 files changed, 324 insertions(+), 283 deletions(-)
create mode 100644 arch/powerpc/include/asm/kvm_types.h

base-commit: c8fbf7ceb2ae3f64b0c377c8c21f6df577a13eb4
--
2.51.0.470.ga7dc726c21-goog