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/kvm/vcpu.c | |
| 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/kvm/vcpu.c')
| -rw-r--r-- | arch/riscv/kvm/vcpu.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index 5acec47236c9..c44cabce7dd8 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -867,6 +867,15 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) } } + /* Process SBI value returned from user-space */ + if (run->exit_reason == KVM_EXIT_RISCV_SBI) { + ret = kvm_riscv_vcpu_sbi_return(vcpu, vcpu->run); + if (ret) { + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); + return ret; + } + } + if (run->immediate_exit) { srcu_read_unlock(&vcpu->kvm->srcu, vcpu->arch.srcu_idx); return -EINTR; |