diff options
Diffstat (limited to 'drivers/s390')
-rw-r--r-- | drivers/s390/char/sclp.c | 10 | ||||
-rw-r--r-- | drivers/s390/char/sclp.h | 10 | ||||
-rw-r--r-- | drivers/s390/char/sclp_cmd.c | 38 | ||||
-rw-r--r-- | drivers/s390/kvm/kvm_virtio.c | 3 |
4 files changed, 50 insertions, 11 deletions
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c index 30f29a0..3fcc000 100644 --- a/drivers/s390/char/sclp.c +++ b/drivers/s390/char/sclp.c @@ -654,16 +654,6 @@ sclp_remove_processed(struct sccb_header *sccb) EXPORT_SYMBOL(sclp_remove_processed); -struct init_sccb { - struct sccb_header header; - u16 _reserved; - u16 mask_length; - sccb_mask_t receive_mask; - sccb_mask_t send_mask; - sccb_mask_t sclp_receive_mask; - sccb_mask_t sclp_send_mask; -} __attribute__((packed)); - /* Prepare init mask request. Called while sclp_lock is locked. */ static inline void __sclp_make_init_req(u32 receive_mask, u32 send_mask) diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index 49a1bb5..d7e97ae 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -88,6 +88,16 @@ struct sccb_header { u16 response_code; } __attribute__((packed)); +struct init_sccb { + struct sccb_header header; + u16 _reserved; + u16 mask_length; + sccb_mask_t receive_mask; + sccb_mask_t send_mask; + sccb_mask_t sclp_receive_mask; + sccb_mask_t sclp_send_mask; +} __attribute__((packed)); + extern u64 sclp_facilities; #define SCLP_HAS_CHP_INFO (sclp_facilities & 0x8000000000000000ULL) #define SCLP_HAS_CHP_RECONFIG (sclp_facilities & 0x2000000000000000ULL) diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c index 766cb7b..71ea923c 100644 --- a/drivers/s390/char/sclp_cmd.c +++ b/drivers/s390/char/sclp_cmd.c @@ -48,6 +48,7 @@ struct read_info_sccb { u8 _reserved5[4096 - 112]; /* 112-4095 */ } __attribute__((packed, aligned(PAGE_SIZE))); +static struct init_sccb __initdata early_event_mask_sccb __aligned(PAGE_SIZE); static struct read_info_sccb __initdata early_read_info_sccb; static int __initdata early_read_info_sccb_valid; @@ -104,6 +105,19 @@ static void __init sclp_read_info_early(void) } } +static void __init sclp_event_mask_early(void) +{ + struct init_sccb *sccb = &early_event_mask_sccb; + int rc; + + do { + memset(sccb, 0, sizeof(*sccb)); + sccb->header.length = sizeof(*sccb); + sccb->mask_length = sizeof(sccb_mask_t); + rc = sclp_cmd_sync_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb); + } while (rc == -EBUSY); +} + void __init sclp_facilities_detect(void) { struct read_info_sccb *sccb; @@ -119,6 +133,30 @@ void __init sclp_facilities_detect(void) rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; rzm <<= 20; + + sclp_event_mask_early(); +} + +bool __init sclp_has_linemode(void) +{ + struct init_sccb *sccb = &early_event_mask_sccb; + + if (sccb->header.response_code != 0x20) + return 0; + if (sccb->sclp_send_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)) + return 1; + return 0; +} + +bool __init sclp_has_vt220(void) +{ + struct init_sccb *sccb = &early_event_mask_sccb; + + if (sccb->header.response_code != 0x20) + return 0; + if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK) + return 1; + return 0; } unsigned long long sclp_get_rnmax(void) diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index d74e9ae..d3bdae4 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -25,6 +25,7 @@ #include <asm/io.h> #include <asm/kvm_para.h> #include <asm/kvm_virtio.h> +#include <asm/sclp.h> #include <asm/setup.h> #include <asm/irq.h> @@ -468,7 +469,7 @@ static __init int early_put_chars(u32 vtermno, const char *buf, int count) static int __init s390_virtio_console_init(void) { - if (!MACHINE_IS_KVM) + if (sclp_has_vt220() || sclp_has_linemode()) return -ENODEV; return virtio_cons_early_init(early_put_chars); } |