3248136b36
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
42 lines
1.1 KiB
Makefile
42 lines
1.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for Kernel-based Virtual Machine module
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#
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ccflags-y += -I $(srctree)/$(src)
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include $(srctree)/virt/kvm/Makefile.kvm
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obj-$(CONFIG_KVM) += kvm.o
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obj-$(CONFIG_KVM) += hyp/
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kvm-y += arm.o mmu.o mmio.o psci.o hypercalls.o pvtime.o \
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inject_fault.o va_layout.o handle_exit.o \
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guest.o debug.o reset.o sys_regs.o \
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vgic-sys-reg-v3.o fpsimd.o pmu.o pkvm.o \
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arch_timer.o trng.o vmid.o \
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vgic/vgic.o vgic/vgic-init.o \
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vgic/vgic-irqfd.o vgic/vgic-v2.o \
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vgic/vgic-v3.o vgic/vgic-v4.o \
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vgic/vgic-mmio.o vgic/vgic-mmio-v2.o \
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vgic/vgic-mmio-v3.o vgic/vgic-kvm-device.o \
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vgic/vgic-its.o vgic/vgic-debug.o
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kvm-$(CONFIG_HW_PERF_EVENTS) += pmu-emul.o
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always-y := hyp_constants.h hyp-constants.s
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define rule_gen_hyp_constants
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$(call filechk,offsets,__HYP_CONSTANTS_H__)
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endef
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CFLAGS_hyp-constants.o = -I $(srctree)/$(src)/hyp/include
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$(obj)/hyp-constants.s: $(src)/hyp/hyp-constants.c FORCE
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$(call if_changed_dep,cc_s_c)
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$(obj)/hyp_constants.h: $(obj)/hyp-constants.s FORCE
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$(call if_changed_rule,gen_hyp_constants)
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obj-kvm := $(addprefix $(obj)/, $(kvm-y))
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$(obj-kvm): $(obj)/hyp_constants.h
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