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| author |   Mark Rutland <mark.rutland@arm.com> | 2016-09-08 13:55:34 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2016-09-09 11:40:39 +0100 |
| commit | 7aff4a2dd3db4e519c636f43aa863078e3b30d0f (patch) | |
| tree | 04647ea7e4ff76116cdfd25cd63d83436e388cb9 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | arm64/io: Allow I/O writes to use {W,X}ZR (diff) | |
| download | wireguard-linux-7aff4a2dd3db4e519c636f43aa863078e3b30d0f.tar.xz wireguard-linux-7aff4a2dd3db4e519c636f43aa863078e3b30d0f.zip | |
arm64: sysreg: allow write_sysreg to use XZR
Currently write_sysreg has to allocate a temporary register to write
zero to a system register, which is unfortunate given that the MSR
instruction accepts XZR as an operand.
Allow XZR to be used when appropriate by fiddling with the assembly
constraints.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions