diff options
| author | Anup Patel <anup.patel@wdc.com> | 2021-09-27 14:40:05 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-10-04 13:19:57 +0300 |
| commit | 34bde9d8b9e6e5249db3c07cf1ebfe75c23c671c (patch) | |
| tree | ff74abdabe5103aae8533e738446e2b0df2be4c8 /arch/riscv/include/asm/kvm_host.h | |
| parent | 92ad82002c39ede73b397d17ba7ab9842517dbe5 (diff) | |
| download | linux-34bde9d8b9e6e5249db3c07cf1ebfe75c23c671c.tar.xz | |
RISC-V: KVM: Implement VCPU world-switch
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>
Diffstat (limited to 'arch/riscv/include/asm/kvm_host.h')
| -rw-r--r-- | arch/riscv/include/asm/kvm_host.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index e307528bbdbf..8ef0ca100e75 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -115,6 +115,14 @@ struct kvm_vcpu_arch { /* ISA feature bits (similar to MISA) */ unsigned long isa; + /* SSCRATCH, STVEC, and SCOUNTEREN of Host */ + unsigned long host_sscratch; + unsigned long host_stvec; + unsigned long host_scounteren; + + /* CPU context of Host */ + struct kvm_cpu_context host_context; + /* CPU context of Guest VCPU */ struct kvm_cpu_context guest_context; @@ -163,7 +171,7 @@ int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run); int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, struct kvm_cpu_trap *trap); -static inline void __kvm_riscv_switch_to(struct kvm_vcpu_arch *vcpu_arch) {} +void __kvm_riscv_switch_to(struct kvm_vcpu_arch *vcpu_arch); int kvm_riscv_vcpu_set_interrupt(struct kvm_vcpu *vcpu, unsigned int irq); int kvm_riscv_vcpu_unset_interrupt(struct kvm_vcpu *vcpu, unsigned int irq); |