diff options
Diffstat (limited to 'drivers/tty/hvc/hvc_vio.c')
| -rw-r--r-- | drivers/tty/hvc/hvc_vio.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c index b05dc5086627..a1d272ac82bb 100644 --- a/drivers/tty/hvc/hvc_vio.c +++ b/drivers/tty/hvc/hvc_vio.c @@ -53,7 +53,7 @@ static const char hvc_driver_name[] = "hvc_console"; -static struct vio_device_id hvc_driver_table[] = { +static const struct vio_device_id hvc_driver_table[] = { {"serial", "hvterm1"}, #ifndef HVC_OLD_HVSI {"serial", "hvterm-protocol"}, @@ -312,12 +312,12 @@ static int hvc_vio_probe(struct vio_dev *vdev, proto = HV_PROTOCOL_HVSI; ops = &hvterm_hvsi_ops; } else { - pr_err("hvc_vio: Unknown protocol for %s\n", vdev->dev.of_node->full_name); + pr_err("hvc_vio: Unknown protocol for %pOF\n", vdev->dev.of_node); return -ENXIO; } - pr_devel("hvc_vio_probe() device %s, using %s protocol\n", - vdev->dev.of_node->full_name, + pr_devel("hvc_vio_probe() device %pOF, using %s protocol\n", + vdev->dev.of_node, proto == HV_PROTOCOL_RAW ? "raw" : "hvsi"); /* Is it our boot one ? */ @@ -442,6 +442,14 @@ void __init hvc_vio_init_early(void) #ifdef CONFIG_PPC_EARLY_DEBUG_LPAR void __init udbg_init_debug_lpar(void) { + /* + * If we're running as a hypervisor then we definitely can't call the + * hypervisor to print debug output (we *are* the hypervisor), so don't + * register if we detect that MSR_HV=1. + */ + if (mfmsr() & MSR_HV) + return; + hvterm_privs[0] = &hvterm_priv0; hvterm_priv0.termno = 0; hvterm_priv0.proto = HV_PROTOCOL_RAW; @@ -455,6 +463,10 @@ void __init udbg_init_debug_lpar(void) #ifdef CONFIG_PPC_EARLY_DEBUG_LPAR_HVSI void __init udbg_init_debug_lpar_hvsi(void) { + /* See comment above in udbg_init_debug_lpar() */ + if (mfmsr() & MSR_HV) + return; + hvterm_privs[0] = &hvterm_priv0; hvterm_priv0.termno = CONFIG_PPC_EARLY_DEBUG_HVSI_VTERMNO; hvterm_priv0.proto = HV_PROTOCOL_HVSI; |