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>

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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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10

arch/riscv/include/asm/kvm_host.h

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78

arch/riscv/kernel/asm-offsets.c

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2

arch/riscv/kvm/Makefile

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30

arch/riscv/kvm/vcpu.c

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203

arch/riscv/kvm/vcpu_switch.S

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