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: Heinz Graalfs <graalfs@linux.vnet.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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@ -55,5 +55,7 @@ int sclp_chp_configure(struct chp_id chpid);
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int sclp_chp_deconfigure(struct chp_id chpid);
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int sclp_chp_read_info(struct sclp_chp_info *info);
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void sclp_get_ipl_info(struct sclp_ipl_info *info);
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bool sclp_has_linemode(void);
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bool sclp_has_vt220(void);
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#endif /* _ASM_S390_SCLP_H */
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@ -63,6 +63,7 @@
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#include <asm/kvm_virtio.h>
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#include <asm/diag.h>
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#include <asm/os_info.h>
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#include <asm/sclp.h>
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#include "entry.h"
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long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY |
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@ -138,9 +139,14 @@ __setup("condev=", condev_setup);
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static void __init set_preferred_console(void)
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{
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if (MACHINE_IS_KVM)
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add_preferred_console("hvc", 0, NULL);
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else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP)
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if (MACHINE_IS_KVM) {
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if (sclp_has_vt220())
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add_preferred_console("ttyS", 1, NULL);
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else if (sclp_has_linemode())
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add_preferred_console("ttyS", 0, NULL);
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else
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add_preferred_console("hvc", 0, NULL);
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} else if (CONSOLE_IS_3215 || CONSOLE_IS_SCLP)
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add_preferred_console("ttyS", 0, NULL);
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else if (CONSOLE_IS_3270)
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add_preferred_console("tty3270", 0, NULL);
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@ -654,16 +654,6 @@ sclp_remove_processed(struct sccb_header *sccb)
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EXPORT_SYMBOL(sclp_remove_processed);
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struct init_sccb {
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struct sccb_header header;
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u16 _reserved;
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u16 mask_length;
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sccb_mask_t receive_mask;
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sccb_mask_t send_mask;
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sccb_mask_t sclp_receive_mask;
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sccb_mask_t sclp_send_mask;
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} __attribute__((packed));
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/* Prepare init mask request. Called while sclp_lock is locked. */
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static inline void
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__sclp_make_init_req(u32 receive_mask, u32 send_mask)
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@ -88,6 +88,16 @@ struct sccb_header {
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u16 response_code;
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} __attribute__((packed));
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struct init_sccb {
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struct sccb_header header;
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u16 _reserved;
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u16 mask_length;
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sccb_mask_t receive_mask;
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sccb_mask_t send_mask;
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sccb_mask_t sclp_receive_mask;
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sccb_mask_t sclp_send_mask;
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} __attribute__((packed));
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extern u64 sclp_facilities;
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#define SCLP_HAS_CHP_INFO (sclp_facilities & 0x8000000000000000ULL)
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#define SCLP_HAS_CHP_RECONFIG (sclp_facilities & 0x2000000000000000ULL)
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@ -48,6 +48,7 @@ struct read_info_sccb {
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u8 _reserved5[4096 - 112]; /* 112-4095 */
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} __attribute__((packed, aligned(PAGE_SIZE)));
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static struct init_sccb __initdata early_event_mask_sccb __aligned(PAGE_SIZE);
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static struct read_info_sccb __initdata early_read_info_sccb;
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static int __initdata early_read_info_sccb_valid;
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@ -104,6 +105,19 @@ static void __init sclp_read_info_early(void)
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}
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}
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static void __init sclp_event_mask_early(void)
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{
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struct init_sccb *sccb = &early_event_mask_sccb;
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int rc;
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do {
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memset(sccb, 0, sizeof(*sccb));
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sccb->header.length = sizeof(*sccb);
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sccb->mask_length = sizeof(sccb_mask_t);
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rc = sclp_cmd_sync_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb);
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} while (rc == -EBUSY);
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}
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void __init sclp_facilities_detect(void)
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{
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struct read_info_sccb *sccb;
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@ -119,6 +133,30 @@ void __init sclp_facilities_detect(void)
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rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
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rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
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rzm <<= 20;
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sclp_event_mask_early();
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}
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bool __init sclp_has_linemode(void)
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{
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struct init_sccb *sccb = &early_event_mask_sccb;
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if (sccb->header.response_code != 0x20)
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return 0;
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if (sccb->sclp_send_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK))
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return 1;
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return 0;
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}
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bool __init sclp_has_vt220(void)
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{
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struct init_sccb *sccb = &early_event_mask_sccb;
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if (sccb->header.response_code != 0x20)
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return 0;
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if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK)
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return 1;
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return 0;
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}
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unsigned long long sclp_get_rnmax(void)
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@ -25,6 +25,7 @@
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#include <asm/io.h>
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#include <asm/kvm_para.h>
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#include <asm/kvm_virtio.h>
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#include <asm/sclp.h>
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#include <asm/setup.h>
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#include <asm/irq.h>
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@ -468,7 +469,7 @@ static __init int early_put_chars(u32 vtermno, const char *buf, int count)
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static int __init s390_virtio_console_init(void)
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{
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if (!MACHINE_IS_KVM)
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if (sclp_has_vt220() || sclp_has_linemode())
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return -ENODEV;
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return virtio_cons_early_init(early_put_chars);
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}
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