diff options
| author | Julien Grall <julien.grall@arm.com> | 2021-11-22 12:18:43 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-02-08 14:57:03 +0000 |
| commit | 3248136b3637e1671e4fa46e32e2122f9ec4bc3d (patch) | |
| tree | f73f39b63f7e6ecf9800b7a796cc5a0b0b186949 /arch/arm64/kvm/Makefile | |
| parent | f8051e960922a9de8e42159103d5d9c697ef17ec (diff) | |
KVM: arm64: Align the VMID allocation with the arm64 ASID
At the moment, the VMID algorithm will send an SGI to all the
CPUs to force an exit and then broadcast a full TLB flush and
I-Cache invalidation.
This patch uses the new VMID allocator. The benefits are:
- Aligns with arm64 ASID algorithm.
- CPUs are not forced to exit at roll-over. Instead,
the VMID will be marked reserved and context invalidation
is broadcasted. This will reduce the IPIs traffic.
- More flexible to add support for pinned KVM VMIDs in
the future.
With the new algo, the code is now adapted:
- The call to update_vmid() will be done with preemption
disabled as the new algo requires to store information
per-CPU.
Signed-off-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211122121844.867-4-shameerali.kolothum.thodi@huawei.com
Diffstat (limited to 'arch/arm64/kvm/Makefile')
| -rw-r--r-- | arch/arm64/kvm/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile index 91861fd8b897..261644b1a6bb 100644 --- a/arch/arm64/kvm/Makefile +++ b/arch/arm64/kvm/Makefile @@ -14,7 +14,7 @@ kvm-y += arm.o mmu.o mmio.o psci.o hypercalls.o pvtime.o \ inject_fault.o va_layout.o handle_exit.o \ guest.o debug.o reset.o sys_regs.o \ vgic-sys-reg-v3.o fpsimd.o pmu.o pkvm.o \ - arch_timer.o trng.o\ + arch_timer.o trng.o vmid.o \ vgic/vgic.o vgic/vgic-init.o \ vgic/vgic-irqfd.o vgic/vgic-v2.o \ vgic/vgic-v3.o vgic/vgic-v4.o \ |