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s390x/css: Introduce an ESW struct

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The Interrupt Response Block is comprised of several other
structures concatenated together, but only the 12-byte
Subchannel-Status Word (SCSW) is defined as a proper struct.
Everything else is a simple array of 32-bit words.

Let's define a proper struct for the 20-byte Extended-Status
Word (ESW) so that we can make good decisions about the sense
data that would go into the ECW area for virtual vs
passthrough devices.

[CH: adapted ESW definition to build with mingw, as discussed]
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20210617232537.1337506-2-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Eric Farman 2021-06-18 01:25:34 +02:00 • committed by Cornelia Huck
parent 10b81272b3
commit 3fdc622ad7
2 changed files with 24 additions and 7 deletions
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12
include/hw/s390x/ioinst.h
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@ -123,10 +123,20 @@ typedef struct SCHIB {
uint8_t mda[4];
} QEMU_PACKED SCHIB;
/* format-0 extended-status word */
typedef struct ESW {
uint32_t word0; /* subchannel logout for format 0 */
uint32_t erw;
uint64_t word2; /* failing-storage address for format 0 */
uint32_t word4; /* secondary-CCW address for format 0 */
} QEMU_PACKED ESW;
#define ESW_ERW_SENSE 0x01000000
/* interruption response block */
typedef struct IRB {
SCSW scsw;
uint32_t esw[5];
ESW esw;
uint32_t ecw[8];
uint32_t emw[8];
} IRB;