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| author | Nico Boehr <nrb@linux.ibm.com> | 2022-01-11 11:00:03 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2022-01-17 14:13:09 +0100 |
| commit | 012a224e1fa31fc256aab921f691598e03db6018 (patch) | |
| tree | 0b07ab1cddfd25b28e0c9c4469a9362e798c798d /tools/kvm | |
| parent | 745f5d20e7936931f924410f32d8b0e599b5990e (diff) | |
| download | linux-012a224e1fa31fc256aab921f691598e03db6018.tar.bz2 | |
s390/uaccess: introduce bit field for OAC specifier
Previously, we've used magic values to specify the OAC
(operand-access control) for mvcos.
Instead we introduce a bit field for it.
When using a bit field, we cannot use an immediate value with K
constraint anymore, since GCC older than 10 doesn't recognize
the bit field union as a compile time constant.
To make things work with older compilers,
load the OAC value through a register.
Bloat-o-meter reports a slight increase in kernel size with this change:
Total: Before=15692135, After=15693015, chg +0.01%
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Co-developed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Link: https://lore.kernel.org/r/20220111100003.743116-1-scgl@linux.ibm.com
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'tools/kvm')
0 files changed, 0 insertions, 0 deletions