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s390/uv: Use a constant for more-data rc

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Add a define for the UVC rc 0x0100 that indicates that a UV-call was
successful but may serve more data if called with a larger buffer
again.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Link: https://lore.kernel.org/r/20241024062638.1465970-2-seiden@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Steffen Eiden
2024-10-24 08:26:33 +02:00
committed by Heiko Carstens
parent 28a51ee8eb
commit da59c71cc7
2 changed files with 3 additions and 2 deletions
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4
arch/s390/boot/uv.c
View File

@@ -22,8 +22,8 @@ void uv_query_info(void)
if (!test_facility(158))
return;
/* rc==0x100 means that there is additional data we do not process */
if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100)
/* Ignore that there might be more data we do not process */
if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != UVC_RC_MORE_DATA)
return;
if (IS_ENABLED(CONFIG_KVM)) {

1
arch/s390/include/asm/uv.h
View File

@@ -28,6 +28,7 @@
#define UVC_RC_INV_STATE 0x0003
#define UVC_RC_INV_LEN 0x0005
#define UVC_RC_NO_RESUME 0x0007
#define UVC_RC_MORE_DATA 0x0100
#define UVC_RC_NEED_DESTROY 0x8000
#define UVC_CMD_QUI 0x0001