Commit cd183459 authored by Heinz Graalfs's avatar Heinz Graalfs Committed by Marcelo Tosatti

KVM: s390: Perform early event mask processing during boot

For processing under KVM it is required to detect
the actual SCLP console type in order to set it as
preferred console.
Signed-off-by: default avatarHeinz Graalfs <graalfs@linux.vnet.ibm.com>
Acked-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: default avatarPeter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 61bde82c
......@@ -55,5 +55,7 @@ int sclp_chp_configure(struct chp_id chpid);
int sclp_chp_deconfigure(struct chp_id chpid);
int sclp_chp_read_info(struct sclp_chp_info *info);
void sclp_get_ipl_info(struct sclp_ipl_info *info);
bool sclp_has_linemode(void);
bool sclp_has_vt220(void);
#endif /* _ASM_S390_SCLP_H */
......@@ -63,6 +63,7 @@
#include <asm/kvm_virtio.h>
#include <asm/diag.h>
#include <asm/os_info.h>
#include <asm/sclp.h>
#include "entry.h"
long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY |
......@@ -138,9 +139,14 @@ __setup("condev=", condev_setup);
static void __init set_preferred_console(void)
{
if (MACHINE_IS_KVM)
add_preferred_console("hvc", 0, NULL);
else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP)
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)
add_preferred_console("ttyS", 0, NULL);
else if (CONSOLE_IS_3270)
add_preferred_console("tty3270", 0, NULL);
......
......@@ -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)
......
......@@ -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)
......
......@@ -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)
......
......@@ -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);
}
......
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