Commit df1fe5bb authored by Cornelia Huck's avatar Cornelia Huck Committed by Alexander Graf
Browse files

s390: Virtual channel subsystem support. 



Provide a mechanism for qemu to provide fully virtual subchannels to
the guest.

Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 7b18aad5

hw/s390x/Makefile.objs

+1 −0
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@@ -6,3 +6,4 @@ obj-y += sclp.o 
obj-y += event-facility.o

obj-y += sclpquiesce.o sclpconsole.o

obj-y += ipl.o

obj-y += css.o

hw/s390x/css.c

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+1277 −0

File added.

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hw/s390x/css.h

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/*

 * Channel subsystem structures and definitions.

 *

 * Copyright 2012 IBM Corp.

 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or (at

 * your option) any later version. See the COPYING file in the top-level

 * directory.

 */



#ifndef CSS_H

#define CSS_H



#include "ioinst.h"



/* Channel subsystem constants. */

#define MAX_SCHID 65535

#define MAX_SSID 3

#define MAX_CSSID 254 /* 255 is reserved */

#define MAX_CHPID 255



#define MAX_CIWS 62



typedef struct CIW {

    uint8_t type;

    uint8_t command;

    uint16_t count;

} QEMU_PACKED CIW;



typedef struct SenseId {

    /* common part */

    uint8_t reserved;        /* always 0x'FF' */

    uint16_t cu_type;        /* control unit type */

    uint8_t cu_model;        /* control unit model */

    uint16_t dev_type;       /* device type */

    uint8_t dev_model;       /* device model */

    uint8_t unused;          /* padding byte */

    /* extended part */

    CIW ciw[MAX_CIWS];       /* variable # of CIWs */

} QEMU_PACKED SenseId;



/* Channel measurements, from linux/drivers/s390/cio/cmf.c. */

typedef struct CMB {

    uint16_t ssch_rsch_count;

    uint16_t sample_count;

    uint32_t device_connect_time;

    uint32_t function_pending_time;

    uint32_t device_disconnect_time;

    uint32_t control_unit_queuing_time;

    uint32_t device_active_only_time;

    uint32_t reserved[2];

} QEMU_PACKED CMB;



typedef struct CMBE {

    uint32_t ssch_rsch_count;

    uint32_t sample_count;

    uint32_t device_connect_time;

    uint32_t function_pending_time;

    uint32_t device_disconnect_time;

    uint32_t control_unit_queuing_time;

    uint32_t device_active_only_time;

    uint32_t device_busy_time;

    uint32_t initial_command_response_time;

    uint32_t reserved[7];

} QEMU_PACKED CMBE;



struct SubchDev {

    /* channel-subsystem related things: */

    uint8_t cssid;

    uint8_t ssid;

    uint16_t schid;

    uint16_t devno;

    SCHIB curr_status;

    uint8_t sense_data[32];

    hwaddr channel_prog;

    CCW1 last_cmd;

    bool last_cmd_valid;

    ORB *orb;

    /* transport-provided data: */

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

    SenseId id;

    void *driver_data;

};



typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,

                                       uint16_t schid);

int css_create_css_image(uint8_t cssid, bool default_image);

bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);

void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,

                      uint16_t devno, SubchDev *sch);

void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);

void css_reset(void);

void css_reset_sch(SubchDev *sch);

void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);

void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,

                           int hotplugged, int add);

void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);

#endif

target-s390x/cpu.h

+62 −0
Original line number Diff line number Diff line
@@ -399,6 +399,30 @@ void cpu_unlock(void); 


typedef struct SubchDev SubchDev;



#ifndef CONFIG_USER_ONLY

SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid,

                         uint16_t schid);

bool css_subch_visible(SubchDev *sch);

void css_conditional_io_interrupt(SubchDev *sch);

int css_do_stsch(SubchDev *sch, SCHIB *schib);

bool css_schid_final(uint8_t cssid, uint8_t ssid, uint16_t schid);

int css_do_msch(SubchDev *sch, SCHIB *schib);

int css_do_xsch(SubchDev *sch);

int css_do_csch(SubchDev *sch);

int css_do_hsch(SubchDev *sch);

int css_do_ssch(SubchDev *sch, ORB *orb);

int css_do_tsch(SubchDev *sch, IRB *irb);

int css_do_stcrw(CRW *crw);

int css_do_tpi(uint64_t addr, int lowcore);

int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid,

                         int rfmt, void *buf);

void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo);

int css_enable_mcsse(void);

int css_enable_mss(void);

int css_do_rsch(SubchDev *sch);

int css_do_rchp(uint8_t cssid, uint8_t chpid);

bool css_present(uint8_t cssid);

#else

static inline SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid,

                                       uint16_t schid)

{
@@ -479,6 +503,7 @@ static inline bool css_present(uint8_t cssid) 
{

    return false;

}

#endif



static inline void cpu_set_tls(CPUS390XState *env, target_ulong newtls)

{
@@ -1031,4 +1056,41 @@ void program_interrupt(CPUS390XState *env, uint32_t code, int ilen); 
void QEMU_NORETURN runtime_exception(CPUS390XState *env, int excp,

                                     uintptr_t retaddr);



#include <sysemu/kvm.h>



static inline void kvm_s390_io_interrupt(S390CPU *cpu,

                                        uint16_t subchannel_id,

                                        uint16_t subchannel_nr,

                                        uint32_t io_int_parm,

                                        uint32_t io_int_word)

{

}

static inline void kvm_s390_crw_mchk(S390CPU *cpu)

{

}



static inline void s390_io_interrupt(S390CPU *cpu,

                                     uint16_t subchannel_id,

                                     uint16_t subchannel_nr,

                                     uint32_t io_int_parm,

                                     uint32_t io_int_word)

{

    if (kvm_enabled()) {

        kvm_s390_io_interrupt(cpu, subchannel_id, subchannel_nr, io_int_parm,

                              io_int_word);

    } else {

        cpu_inject_io(&cpu->env, subchannel_id, subchannel_nr, io_int_parm,

                      io_int_word);

    }

}



static inline void s390_crw_mchk(S390CPU *cpu)

{

    if (kvm_enabled()) {

        kvm_s390_crw_mchk(cpu);

    } else {

        cpu_inject_crw_mchk(&cpu->env);

    }

}



#endif

trace-events

+8 −0
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@@ -1078,3 +1078,11 @@ ioinst(const char *insn) "IOINST: %s" 
ioinst_sch_id(const char *insn, int cssid, int ssid, int schid) "IOINST: %s (%x.%x.%04x)"

ioinst_chp_id(const char *insn, int cssid, int chpid) "IOINST: %s (%x.%02x)"

ioinst_chsc_cmd(uint16_t cmd, uint16_t len) "IOINST: chsc command %04x, len %04x"



# hw/s390x/css.c

css_enable_facility(const char *facility) "CSS: enable %s"

css_crw(uint8_t rsc, uint8_t erc, uint16_t rsid, const char *chained) "CSS: queueing crw: rsc=%x, erc=%x, rsid=%x %s"

css_chpid_add(uint8_t cssid, uint8_t chpid, uint8_t type) "CSS: add chpid %x.%02x (type %02x)"

css_new_image(uint8_t cssid, const char *default_cssid) "CSS: add css image %02x %s"

css_assign_subch(const char *do_assign, uint8_t cssid, uint8_t ssid, uint16_t schid, uint16_t devno) "CSS: %s %x.%x.%04x (devno %04x)"

css_io_interrupt(int cssid, int ssid, int schid, uint32_t intparm, uint8_t isc, const char *conditional) "CSS: I/O interrupt on sch %x.%x.%04x (intparm %08x, isc %x) %s"