Commit graph

4 commits

Author SHA1 Message Date
Peter Maydell
8840d8370d
target-arm: Split DISAS_YIELD from DISAS_WFE
Currently we use DISAS_WFE for both WFE and YIELD instructions.
This is functionally correct because at the moment both of them
are implemented as "yield this CPU back to the top level loop so
another CPU has a chance to run". However it's rather confusing
that YIELD ends up calling HELPER(wfe), and if we ever want to
implement real behaviour for WFE and SEV it's likely to trip us up.

Split out the yield codepath to use DISAS_YIELD and a new
HELPER(yield) function, and have HELPER(wfe) call HELPER(yield).

Backports commit 049e24a191c212d9468db84169197887f2c91586 from qemu
2018-02-17 15:23:14 -05:00
Greg Bellows
edd8066082
target-arm: Add exception target el infrastructure
Add a CPU state exception target EL field that will be used for communicating
the EL to which an exception should be routed.

Add a disassembly context field for tracking the EL3 architecture needed for
determining the target exception EL.

Add a target EL argument to the generic exception helper for callers to specify
the EL to which the exception should be routed. Extended the helper to set
the newly added CPU state exception target el.

Added a function for setting the target exception EL and updated calls to helpers
to call it.

Backports commit 737103619869600668cc7e8700e4f6eab3943896 from qemu
2018-02-12 22:17:02 -05:00
Ryan Hileman
0886ae8ede rework code/block tracing 2016-01-22 18:42:27 -08:00
Nguyen Anh Quynh
344d016104 import 2015-08-21 15:04:50 +08:00