diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 484d04a92fa6..da4ab7e175ff 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -43,6 +43,17 @@ KVM_ARCH_REQ_FLAGS(5, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) #define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(6) +#define KVM_HEDELEG_DEFAULT (BIT(EXC_INST_MISALIGNED) | \ + BIT(EXC_BREAKPOINT) | \ + BIT(EXC_SYSCALL) | \ + BIT(EXC_INST_PAGE_FAULT) | \ + BIT(EXC_LOAD_PAGE_FAULT) | \ + BIT(EXC_STORE_PAGE_FAULT)) + +#define KVM_HIDELEG_DEFAULT (BIT(IRQ_VS_SOFT) | \ + BIT(IRQ_VS_TIMER) | \ + BIT(IRQ_VS_EXT)) + enum kvm_riscv_hfence_type { KVM_RISCV_HFENCE_UNKNOWN = 0, KVM_RISCV_HFENCE_GVMA_VMID_GPA, @@ -169,6 +180,7 @@ struct kvm_vcpu_csr { struct kvm_vcpu_config { u64 henvcfg; u64 hstateen0; + unsigned long hedeleg; }; struct kvm_vcpu_smstateen_csr { diff --git a/arch/riscv/kvm/main.c b/arch/riscv/kvm/main.c index 225a435d9c9a..bab2ec34cd87 100644 --- a/arch/riscv/kvm/main.c +++ b/arch/riscv/kvm/main.c @@ -22,22 +22,8 @@ long kvm_arch_dev_ioctl(struct file *filp, int kvm_arch_hardware_enable(void) { - unsigned long hideleg, hedeleg; - - hedeleg = 0; - hedeleg |= (1UL << EXC_INST_MISALIGNED); - hedeleg |= (1UL << EXC_BREAKPOINT); - hedeleg |= (1UL << EXC_SYSCALL); - hedeleg |= (1UL << EXC_INST_PAGE_FAULT); - hedeleg |= (1UL << EXC_LOAD_PAGE_FAULT); - hedeleg |= (1UL << EXC_STORE_PAGE_FAULT); - csr_write(CSR_HEDELEG, hedeleg); - - hideleg = 0; - hideleg |= (1UL << IRQ_VS_SOFT); - hideleg |= (1UL << IRQ_VS_TIMER); - hideleg |= (1UL << IRQ_VS_EXT); - csr_write(CSR_HIDELEG, hideleg); + csr_write(CSR_HEDELEG, KVM_HEDELEG_DEFAULT); + csr_write(CSR_HIDELEG, KVM_HIDELEG_DEFAULT); /* VS should access only the time counter directly. Everything else should trap */ csr_write(CSR_HCOUNTEREN, 0x02); diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index b5ca9f2e98ac..f3c87f0c93ba 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -475,8 +475,15 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) { - /* TODO; To be implemented later. */ - return -EINVAL; + if (dbg->control & KVM_GUESTDBG_ENABLE) { + vcpu->guest_debug = dbg->control; + vcpu->arch.cfg.hedeleg &= ~BIT(EXC_BREAKPOINT); + } else { + vcpu->guest_debug = 0; + vcpu->arch.cfg.hedeleg |= BIT(EXC_BREAKPOINT); + } + + return 0; } static void kvm_riscv_vcpu_setup_config(struct kvm_vcpu *vcpu) @@ -505,6 +512,10 @@ static void kvm_riscv_vcpu_setup_config(struct kvm_vcpu *vcpu) if (riscv_isa_extension_available(isa, SMSTATEEN)) cfg->hstateen0 |= SMSTATEEN0_SSTATEEN0; } + + cfg->hedeleg = KVM_HEDELEG_DEFAULT; + if (vcpu->guest_debug) + cfg->hedeleg &= ~BIT(EXC_BREAKPOINT); } void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) @@ -519,6 +530,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) csr_write(CSR_VSEPC, csr->vsepc); csr_write(CSR_VSCAUSE, csr->vscause); csr_write(CSR_VSTVAL, csr->vstval); + csr_write(CSR_HEDELEG, cfg->hedeleg); csr_write(CSR_HVIP, csr->hvip); csr_write(CSR_VSATP, csr->vsatp); csr_write(CSR_HENVCFG, cfg->henvcfg); diff --git a/arch/riscv/kvm/vm.c b/arch/riscv/kvm/vm.c index ce58bc48e5b8..7396b8654f45 100644 --- a/arch/riscv/kvm/vm.c +++ b/arch/riscv/kvm/vm.c @@ -186,6 +186,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_READONLY_MEM: case KVM_CAP_MP_STATE: case KVM_CAP_IMMEDIATE_EXIT: + case KVM_CAP_SET_GUEST_DEBUG: r = 1; break; case KVM_CAP_NR_VCPUS: