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RISC-V: KVM: Implement VCPU world-switch

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This patch implements the VCPU world-switch for KVM RISC-V.

The KVM RISC-V world-switch (i.e. __kvm_riscv_switch_to()) mostly
switches general purpose registers, SSTATUS, STVEC, SSCRATCH and
HSTATUS CSRs. Other CSRs are switched via vcpu_load() and vcpu_put()
interface in kvm_arch_vcpu_load() and kvm_arch_vcpu_put() functions
respectively.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alexander Graf <graf@amazon.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Anup Patel
2021-09-27 17:10:05 +05:30
committed by Anup Patel
parent 92ad82002c
commit 34bde9d8b9
5 changed files with 319 additions and 4 deletions
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2
arch/riscv/kvm/Makefile
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@@ -10,4 +10,4 @@ KVM := ../../../virt/kvm
obj-$(CONFIG_KVM) += kvm.o
kvm-y += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/binary_stats.o \
main.o vm.o mmu.o vcpu.o vcpu_exit.o
main.o vm.o mmu.o vcpu.o vcpu_exit.o vcpu_switch.o