motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 16:23:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

s390x/css: realize css_sch_build_schib

Browse source 
The S390 virtual css support already has a mechanism to build a
virtual subchannel information block (schib) and provide virtual
subchannels to the guest. However, to pass-through subchannels to
a guest, we need to introduce a new mechanism to build its schib
according to the real device information. Thus we realize a new css
sch_build_schib function to extract the path_masks, chpids, chpid
type from sysfs. To reuse the existing code, we refactor
css_add_virtual_chpid to css_add_chpid.

Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170517004813.58227-5-bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Xiao Feng Ren 2017-05-17 02:48:04 +02:00 • committed by Cornelia Huck
parent 274250c301
commit 8f3cf0128c
2 changed files with 168 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

36
include/hw/s390x/css.h
View file

@ -95,6 +95,24 @@ struct SubchDev {
void *driver_data;
};
/*
* Identify a device within the channel subsystem.
* Note that this can be used to identify either the subchannel or
* the attached I/O device, as there's always one I/O device per
* subchannel.
*/
typedef struct CssDevId {
uint8_t cssid;
uint8_t ssid;
uint16_t devid;
bool valid;
} CssDevId;
extern PropertyInfo css_devid_propinfo;
#define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId)
typedef struct IndAddr {
hwaddr addr;
uint64_t map;
@ -116,6 +134,7 @@ 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);
int css_sch_build_schib(SubchDev *sch, CssDevId *dev_id);
unsigned int css_find_free_chpid(uint8_t cssid);
uint16_t css_build_subchannel_id(SubchDev *sch);
void css_reset(void);
@ -164,23 +183,6 @@ int css_do_rsch(SubchDev *sch);
int css_do_rchp(uint8_t cssid, uint8_t chpid);
bool css_present(uint8_t cssid);
#endif
/*
* Identify a device within the channel subsystem.
* Note that this can be used to identify either the subchannel or
* the attached I/O device, as there's always one I/O device per
* subchannel.
*/
typedef struct CssDevId {
uint8_t cssid;
uint8_t ssid;
uint16_t devid;
bool valid;
} CssDevId;
extern PropertyInfo css_devid_propinfo;
#define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId)
extern PropertyInfo css_devid_ro_propinfo;