lwn.git/arch/s390/kvm/Kconfig, branch docs-fixes

KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER

2026-02-28T14:31:35+00:00

All architectures now use MMU notifier for KVM page table management. Remove the Kconfig symbol and the code that is used when it is disabled. Signed-off-by: Paolo Bonzini

KVM: s390: Enable KVM_GENERIC_MMU_NOTIFIER

2026-02-04T16:00:08+00:00

Enable KVM_GENERIC_MMU_NOTIFIER, for now with empty placeholder callbacks. Also enable KVM_MMU_LOCKLESS_AGING and define KVM_HAVE_MMU_RWLOCK. Acked-by: Christian Borntraeger Reviewed-by: Steffen Eiden Reviewed-by: Christoph Schlameuss Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda

Merge tag 'kvm-s390-next-6.19-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

2025-12-02T17:58:47+00:00

- SCA rework - VIRT_XFER_TO_GUEST_WORK support - Operation exception forwarding support - Cleanups

KVM: s390: Use generic VIRT_XFER_TO_GUEST_WORK functions

2025-11-28T09:11:14+00:00

Switch to using the generic infrastructure to check for and handle pending work before transitioning into guest mode. xfer_to_guest_mode_handle_work() does a few more things than the current code does when deciding whether or not to exit the __vcpu_run() loop. The exittime tests from kvm-unit-tests, in my tests, were within a few percent compared to before this series, which is within noise tolerance. Co-developed-by: Heiko Carstens Signed-off-by: Heiko Carstens Signed-off-by: Andrew Donnellan Acked-by: Janosch Frank [frankja@linux.ibm.com: Removed semicolon] Signed-off-by: Janosch Frank

KVM: Make support for kvm_arch_vcpu_async_ioctl() mandatory

2025-11-05T19:03:10+00:00

Implement kvm_arch_vcpu_async_ioctl() "natively" in x86 and arm64 instead of relying on an #ifdef'd stub, and drop HAVE_KVM_VCPU_ASYNC_IOCTL in anticipation of using the API on x86. Once x86 uses the API, providing a stub for one architecture and having all other architectures opt-in requires more code than simply implementing the API in the lone holdout. Eliminating the Kconfig will also reduce churn if the API is renamed in the future (spoiler alert). No functional change intended. Acked-by: Claudio Imbrenda Reviewed-by: Yan Zhao Tested-by: Yan Zhao Tested-by: Kai Huang Link: https://patch.msgid.link/20251030200951.3402865-2-seanjc@google.com Signed-off-by: Sean Christopherson

treewide: remove CONFIG_HAVE_KVM

2024-02-08T13:45:36+00:00

It has no users anymore. Signed-off-by: Paolo Bonzini

KVM: introduce CONFIG_KVM_COMMON

2024-01-08T13:09:38+00:00

CONFIG_HAVE_KVM is currently used by some architectures to either enabled the KVM config proper, or to enable host-side code that is not part of the KVM module. However, CONFIG_KVM's "select" statement in virt/kvm/Kconfig corresponds to a third meaning, namely to enable common Kconfigs required by all architectures that support KVM. These three meanings can be replaced respectively by an architecture-specific Kconfig, by IS_ENABLED(CONFIG_KVM), or by a new Kconfig symbol that is in turn selected by the architecture-specific "config KVM". Start by introducing such a new Kconfig symbol, CONFIG_KVM_COMMON. Unlike CONFIG_HAVE_KVM, it is selected by CONFIG_KVM, not by architecture code, and it brings in all dependencies of common KVM code. In particular, INTERVAL_TREE was missing in loongarch and riscv, so that is another thing that is fixed. Fixes: 8132d887a702 ("KVM: remove CONFIG_HAVE_KVM_EVENTFD", 2023-12-08) Reported-by: Randy Dunlap Closes: https://lore.kernel.org/all/44907c6b-c5bd-4e4a-a921-e4d3825539d8@infradead.org/ Reviewed-by: Andrew Jones Signed-off-by: Paolo Bonzini

KVM: remove CONFIG_HAVE_KVM_IRQFD

2023-12-08T20:43:33+00:00

All platforms with a kernel irqchip have support for irqfd. Unify the two configuration items so that userspace can expect to use irqfd to inject interrupts into the irqchip. Signed-off-by: Paolo Bonzini

KVM: remove CONFIG_HAVE_KVM_EVENTFD

2023-12-08T20:43:33+00:00

virt/kvm/eventfd.c is compiled unconditionally, meaning that the ioeventfds member of struct kvm is accessed unconditionally. CONFIG_HAVE_KVM_EVENTFD therefore must be defined for KVM common code to compile successfully, remove it. Signed-off-by: Paolo Bonzini

kvm: Remove "select SRCU"

2023-04-05T13:47:42+00:00

Now that the SRCU Kconfig option is unconditionally selected, there is no longer any point in selecting it. Therefore, remove the "select SRCU" Kconfig statements from the various KVM Kconfig files. Acked-by: Sean Christopherson (x86) Signed-off-by: Paul E. McKenney Cc: Huacai Chen Cc: Aleksandar Markovic Cc: Thomas Bogendoerfer Cc: Michael Ellerman Cc: Christophe Leroy Cc: Sean Christopherson Cc: Paolo Bonzini Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" Cc: Acked-by: Marc Zyngier (arm64) Acked-by: Michael Ellerman (powerpc) Acked-by: Anup Patel (riscv) Acked-by: Heiko Carstens (s390) Reviewed-by: John Ogness Signed-off-by: Joel Fernandes (Google)