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[PATCH 00/17] kvm: drop support for really old kernels
From: |
Paolo Bonzini |
Subject: |
[PATCH 00/17] kvm: drop support for really old kernels |
Date: |
Wed, 18 Oct 2023 18:37:11 +0200 |
This removes checks for KVM capabilities introduced in very old kernels.
I focused mostly (though not exclusively) on caps that are extremely
old or have a lot of supporting code around them. The new inferior
limit is Linux 4.4 (or RHEL/CentOS 7) for all architectures except ARM,
for which the limit is Linux 4.19 (or RHEL/CentOS 8).
Note that sometimes older capabilities have evolved and have to
be tested anyway, for example in the case of KVM_CAP_ADJUST_CLOCK
it is possible to remove kvm_has_adjust_clock() but not
kvm_has_adjust_clock_stable().
I intentionally didn't include capabilities that map to guest-visible
features, such as KVM_CAP_TSC_DEADLINE_TIMER, instead focusing more
on very old APIs.
Kernel code technically does not require KVM_CAP_IRQFD to be always
available on architectures that support an in-kernel interrupt controller;
however this is currently true for all supported architectures, and
I plan to submit a kernel patch to ensure this equivalence.
Paolo
Paolo Bonzini (17):
kvm: remove unnecessary stub
kvm: require KVM_CAP_INTERNAL_ERROR_DATA
kvm: require KVM_CAP_SIGNAL_MSI
kvm: require KVM_CAP_IRQFD for kernel irqchip
kvm: drop reference to KVM_CAP_PCI_2_3
kvm: assume that many ioeventfds can be created
kvm: require KVM_CAP_IOEVENTFD and KVM_CAP_IOEVENTFD_ANY_LENGTH
kvm: unify listeners for PIO address space
kvm: arm: require KVM_CAP_SET_VCPU_EVENTS
kvm: i386: move KVM_CAP_IRQ_ROUTING detection to
kvm_arch_required_capabilities
kvm: i386: require KVM_CAP_DEBUGREGS
kvm: i386: require KVM_CAP_XSAVE
kvm: i386: require KVM_CAP_SET_VCPU_EVENTS and KVM_CAP_X86_ROBUST_SINGLESTEP
kvm: i386: require KVM_CAP_MCE
kvm: i386: require KVM_CAP_ADJUST_CLOCK
kvm: i386: require KVM_CAP_SET_IDENTITY_MAP_ADDR
kvm: i8254: require KVM_CAP_PIT2 and KVM_CAP_PIT_STATE2
accel/kvm/kvm-all.c | 239 ++++-----------------------------
accel/stubs/kvm-stub.c | 14 --
hw/i386/kvm/clock.c | 4 -
hw/i386/kvm/i8254.c | 38 ++----
hw/i386/pc.c | 6 +-
hw/intc/arm_gicv3_its_common.c | 3 +-
hw/intc/arm_gicv3_its_kvm.c | 2 +-
hw/misc/pci-testdev.c | 3 +-
hw/s390x/virtio-ccw.c | 4 -
hw/virtio/vhost-user.c | 7 +-
hw/virtio/virtio-mmio.c | 4 -
hw/virtio/virtio-pci.c | 23 +---
include/sysemu/kvm.h | 39 +-----
include/sysemu/kvm_int.h | 6 -
system/memory.c | 16 +--
target/arm/kvm.c | 10 +-
target/i386/kvm/kvm.c | 225 +++----------------------------
target/i386/kvm/kvm_i386.h | 2 -
target/riscv/kvm/kvm-cpu.c | 2 +-
20 files changed, 77 insertions(+), 572 deletions(-)
--
2.41.0
- [PATCH 00/17] kvm: drop support for really old kernels,
Paolo Bonzini <=
- [PATCH 01/17] kvm: remove unnecessary stub, Paolo Bonzini, 2023/10/18
- [PATCH 02/17] kvm: require KVM_CAP_INTERNAL_ERROR_DATA, Paolo Bonzini, 2023/10/18
- [PATCH 06/17] kvm: assume that many ioeventfds can be created, Paolo Bonzini, 2023/10/18
- [PATCH 04/17] kvm: require KVM_CAP_IRQFD for kernel irqchip, Paolo Bonzini, 2023/10/18
- [PATCH 05/17] kvm: drop reference to KVM_CAP_PCI_2_3, Paolo Bonzini, 2023/10/18
- [PATCH 03/17] kvm: require KVM_CAP_SIGNAL_MSI, Paolo Bonzini, 2023/10/18
- [PATCH 07/17] kvm: require KVM_CAP_IOEVENTFD and KVM_CAP_IOEVENTFD_ANY_LENGTH, Paolo Bonzini, 2023/10/18