diff options
| author | Atish Patra <atish.patra@wdc.com> | 2021-09-27 14:40:14 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-10-04 13:41:30 +0300 |
| commit | dea8ee31a039277576c215fffa13957970246366 (patch) | |
| tree | f2505e728be6bd47af59f10d4ab6296fdcbe9704 /arch/riscv/include/asm/kvm_host.h | |
| parent | 4d9c5c072f03770516cb343bb3ddd42b57cd21b8 (diff) | |
| download | linux-dea8ee31a039277576c215fffa13957970246366.tar.xz | |
RISC-V: KVM: Add SBI v0.1 support
The KVM host kernel is running in HS-mode needs so we need to handle
the SBI calls coming from guest kernel running in VS-mode.
This patch adds SBI v0.1 support in KVM RISC-V. Almost all SBI v0.1
calls are implemented in KVM kernel module except GETCHAR and PUTCHART
calls which are forwarded to user space because these calls cannot be
implemented in kernel space. In future, when we implement SBI v0.2 for
Guest, we will forward SBI v0.2 experimental and vendor extension calls
to user space.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.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, 10 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index be159686da46..d7e1696cd2ec 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -74,6 +74,10 @@ struct kvm_mmio_decode { int return_handled; }; +struct kvm_sbi_context { + int return_handled; +}; + #define KVM_MMU_PAGE_CACHE_NR_OBJS 32 struct kvm_mmu_page_cache { @@ -186,6 +190,9 @@ struct kvm_vcpu_arch { /* MMIO instruction details */ struct kvm_mmio_decode mmio_decode; + /* SBI context */ + struct kvm_sbi_context sbi_context; + /* Cache pages needed to program page tables with spinlock held */ struct kvm_mmu_page_cache mmu_page_cache; @@ -253,4 +260,7 @@ bool kvm_riscv_vcpu_has_interrupts(struct kvm_vcpu *vcpu, unsigned long mask); void kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu); void kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu); +int kvm_riscv_vcpu_sbi_return(struct kvm_vcpu *vcpu, struct kvm_run *run); +int kvm_riscv_vcpu_sbi_ecall(struct kvm_vcpu *vcpu, struct kvm_run *run); + #endif /* __RISCV_KVM_HOST_H__ */ |