diff options
| author | Peter Oberparleiter <oberpar@linux.vnet.ibm.com> | 2016-07-07 07:52:38 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-07-13 10:58:07 +0200 |
| commit | 8f50af49f564d4e57c03903ca374109bdc270ea9 (patch) | |
| tree | 14759aa507a258b30f9b04cdab090cf10c0b0cd5 | |
| parent | f045402984404ddc11016358411e445192919047 (diff) | |
s390/console: Make preferred console handling more consistent
Use the same code structure when determining preferred consoles for
Linux running as KVM guest as with Linux running in LPAR and z/VM
guest:
- Extend the console_mode variable to cover vt220 and hvc consoles
- Determine sensible console defaults in conmode_default()
- Remove KVM-special handling in set_preferred_console()
Ensure that the sclp line mode console is also registered when the
vt220 console was selected to not change existing behavior that
someone might be relying on.
As an externally visible change, KVM guest users can now select
the 3270 or 3215 console devices using the conmode= kernel parameter,
provided that support for the corresponding driver was compiled into
the kernel.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jing Liu <liujbjl@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/setup.h | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 22 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_con.c | 3 |
3 files changed, 20 insertions, 9 deletions
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index c0f0efbb6ab5..5e8d57e1cc5e 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -86,9 +86,13 @@ extern char vmpoff_cmd[]; #define CONSOLE_IS_SCLP (console_mode == 1) #define CONSOLE_IS_3215 (console_mode == 2) #define CONSOLE_IS_3270 (console_mode == 3) +#define CONSOLE_IS_VT220 (console_mode == 4) +#define CONSOLE_IS_HVC (console_mode == 5) #define SET_CONSOLE_SCLP do { console_mode = 1; } while (0) #define SET_CONSOLE_3215 do { console_mode = 2; } while (0) #define SET_CONSOLE_3270 do { console_mode = 3; } while (0) +#define SET_CONSOLE_VT220 do { console_mode = 4; } while (0) +#define SET_CONSOLE_HVC do { console_mode = 5; } while (0) #define NSS_NAME_SIZE 8 extern char kernel_nss_name[]; diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 00e38f0c75df..ba5f456edaa9 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -130,17 +130,14 @@ __setup("condev=", condev_setup); static void __init set_preferred_console(void) { - if (MACHINE_IS_KVM) { - if (sclp.has_vt220) - add_preferred_console("ttyS", 1, NULL); - else if (sclp.has_linemode) - add_preferred_console("ttyS", 0, NULL); - else - add_preferred_console("hvc", 0, NULL); - } else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) + if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP) add_preferred_console("ttyS", 0, NULL); else if (CONSOLE_IS_3270) add_preferred_console("tty3270", 0, NULL); + else if (CONSOLE_IS_VT220) + add_preferred_console("ttyS", 1, NULL); + else if (CONSOLE_IS_HVC) + add_preferred_console("hvc", 0, NULL); } static int __init conmode_setup(char *str) @@ -206,6 +203,15 @@ static void __init conmode_default(void) SET_CONSOLE_SCLP; #endif } + } else if (MACHINE_IS_KVM) { + if (sclp.has_vt220 && + config_enabled(CONFIG_SCLP_VT220_CONSOLE)) + SET_CONSOLE_VT220; + else if (sclp.has_linemode && + config_enabled(CONFIG_SCLP_CONSOLE)) + SET_CONSOLE_SCLP; + else + SET_CONSOLE_HVC; } else { #if defined(CONFIG_SCLP_CONSOLE) || defined(CONFIG_SCLP_VT220_CONSOLE) SET_CONSOLE_SCLP; diff --git a/drivers/s390/char/sclp_con.c b/drivers/s390/char/sclp_con.c index 5880def98fc1..6037bc87e767 100644 --- a/drivers/s390/char/sclp_con.c +++ b/drivers/s390/char/sclp_con.c @@ -319,7 +319,8 @@ sclp_console_init(void) int i; int rc; - if (!CONSOLE_IS_SCLP) + /* SCLP consoles are handled together */ + if (!(CONSOLE_IS_SCLP || CONSOLE_IS_VT220)) return 0; rc = sclp_rw_init(); if (rc) |