Commit a327c921 authored by Cornelia Huck's avatar Cornelia Huck Committed by Christian Borntraeger
Browse files

s390x/css: support format-0 ccws 



Add support for format-0 ccws in channel programs. As a format-1 ccw
contains the same information as format-0 ccws, only supporting larger
addresses, simply convert every ccw to format-1 as we walk the chain.

Reviewed-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarJens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 45074914

hw/s390x/css.c

+21 −9
Original line number Diff line number Diff line
@@ -243,17 +243,25 @@ static void copy_sense_id_to_guest(SenseId *dest, SenseId *src) 
    }

}



static CCW1 copy_ccw_from_guest(hwaddr addr)

static CCW1 copy_ccw_from_guest(hwaddr addr, bool fmt1)

{

    CCW1 tmp;

    CCW0 tmp0;

    CCW1 tmp1;

    CCW1 ret;



    cpu_physical_memory_read(addr, &tmp, sizeof(tmp));

    ret.cmd_code = tmp.cmd_code;

    ret.flags = tmp.flags;

    ret.count = be16_to_cpu(tmp.count);

    ret.cda = be32_to_cpu(tmp.cda);



    if (fmt1) {

        cpu_physical_memory_read(addr, &tmp1, sizeof(tmp1));

        ret.cmd_code = tmp1.cmd_code;

        ret.flags = tmp1.flags;

        ret.count = be16_to_cpu(tmp1.count);

        ret.cda = be32_to_cpu(tmp1.cda);

    } else {

        cpu_physical_memory_read(addr, &tmp0, sizeof(tmp0));

        ret.cmd_code = tmp0.cmd_code;

        ret.flags = tmp0.flags;

        ret.count = be16_to_cpu(tmp0.count);

        ret.cda = be16_to_cpu(tmp0.cda1) | (tmp0.cda0 << 16);

    }

    return ret;

}
@@ -268,7 +276,8 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr) 
        return -EIO;

    }



    ccw = copy_ccw_from_guest(ccw_addr);

    /* Translate everything to format-1 ccws - the information is the same. */

    ccw = copy_ccw_from_guest(ccw_addr, sch->ccw_fmt_1);



    /* Check for invalid command codes. */

    if ((ccw.cmd_code & 0x0f) == 0) {
@@ -386,6 +395,7 @@ static void sch_handle_start_func(SubchDev *sch, ORB *orb) 
            s->ctrl |= (SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND);

            return;

        }

        sch->ccw_fmt_1 = !!(orb->ctrl0 & ORB_CTRL0_MASK_FMT);

    } else {

        s->ctrl &= ~(SCSW_ACTL_SUSP | SCSW_ACTL_RESUME_PEND);

    }
@@ -1347,6 +1357,7 @@ void subch_device_save(SubchDev *s, QEMUFile *f) 
        qemu_put_byte(f, s->id.ciw[i].command);

        qemu_put_be16(f, s->id.ciw[i].count);

    }

    qemu_put_byte(f, s->ccw_fmt_1);

    return;

}
@@ -1402,6 +1413,7 @@ int subch_device_load(SubchDev *s, QEMUFile *f) 
        s->id.ciw[i].command = qemu_get_byte(f);

        s->id.ciw[i].count = qemu_get_be16(f);

    }

    s->ccw_fmt_1 = qemu_get_byte(f);

    return 0;

}

hw/s390x/css.h

+1 −0
Original line number Diff line number Diff line
@@ -76,6 +76,7 @@ struct SubchDev { 
    hwaddr channel_prog;

    CCW1 last_cmd;

    bool last_cmd_valid;

    bool ccw_fmt_1;

    bool thinint_active;

    /* transport-provided data: */

    int (*ccw_cb) (SubchDev *, CCW1);

target-s390x/ioinst.h

+10 −0
Original line number Diff line number Diff line
@@ -156,6 +156,16 @@ typedef struct ORB { 
#define ORB_CTRL1_MASK_ORBX 0x01

#define ORB_CTRL1_MASK_INVALID 0x3e



/* channel command word (type 0) */

typedef struct CCW0 {

        uint8_t cmd_code;

        uint8_t cda0;

        uint16_t cda1;

        uint8_t flags;

        uint8_t reserved;

        uint16_t count;

} QEMU_PACKED CCW0;



/* channel command word (type 1) */

typedef struct CCW1 {

    uint8_t cmd_code;