diff options
Diffstat (limited to 'arch/arm64/kvm/guest.c')
| -rw-r--r-- | arch/arm64/kvm/guest.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 9535bd555d1d..d250160d32bc 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -32,6 +32,8 @@ #include <asm/kvm_emulate.h> #include <asm/kvm_coproc.h> +#include "trace.h" + struct kvm_stats_debugfs_item debugfs_entries[] = { { NULL } }; @@ -293,7 +295,8 @@ int __attribute_const__ kvm_target_cpu(void) break; }; - return -EINVAL; + /* Return a default generic target */ + return KVM_ARM_TARGET_GENERIC_V8; } int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init) @@ -331,3 +334,41 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, { return -EINVAL; } + +#define KVM_GUESTDBG_VALID_MASK (KVM_GUESTDBG_ENABLE | \ + KVM_GUESTDBG_USE_SW_BP | \ + KVM_GUESTDBG_USE_HW | \ + KVM_GUESTDBG_SINGLESTEP) + +/** + * kvm_arch_vcpu_ioctl_set_guest_debug - set up guest debugging + * @kvm: pointer to the KVM struct + * @kvm_guest_debug: the ioctl data buffer + * + * This sets up and enables the VM for guest debugging. Userspace + * passes in a control flag to enable different debug types and + * potentially other architecture specific information in the rest of + * the structure. + */ +int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, + struct kvm_guest_debug *dbg) +{ + trace_kvm_set_guest_debug(vcpu, dbg->control); + + if (dbg->control & ~KVM_GUESTDBG_VALID_MASK) + return -EINVAL; + + if (dbg->control & KVM_GUESTDBG_ENABLE) { + vcpu->guest_debug = dbg->control; + + /* Hardware assisted Break and Watch points */ + if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW) { + vcpu->arch.external_debug_state = dbg->arch; + } + + } else { + /* If not enabled clear all flags */ + vcpu->guest_debug = 0; + } + return 0; +} |