diff options
| author | Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> | 2021-11-22 12:18:41 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-02-08 14:46:28 +0000 |
| commit | 417838392f2e657ee25cc30e373ff4c35a0faa90 (patch) | |
| tree | 81e2df787cb9057107ff48d79601199eccf73742 /arch/arm64/include | |
| parent | dfd42facf1e4ada021b939b4e19c935dcdd55566 (diff) | |
KVM: arm64: Introduce a new VMID allocator for KVM
A new VMID allocator for arm64 KVM use. This is based on
arm64 ASID allocator algorithm.
One major deviation from the ASID allocator is the way we
flush the context. Unlike ASID allocator, we expect less
frequent rollover in the case of VMIDs. Hence, instead of
marking the CPU as flush_pending and issuing a local context
invalidation on the next context switch, we broadcast TLB
flush + I-cache invalidation over the inner shareable domain
on rollover.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211122121844.867-2-shameerali.kolothum.thodi@huawei.com
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 5bc01e62c08a..a79b7c1b353f 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -692,6 +692,10 @@ int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu, int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); +int kvm_arm_vmid_alloc_init(void); +void kvm_arm_vmid_alloc_free(void); +void kvm_arm_vmid_update(struct kvm_vmid *kvm_vmid); + static inline void kvm_arm_pvtime_vcpu_init(struct kvm_vcpu_arch *vcpu_arch) { vcpu_arch->steal.base = GPA_INVALID; |