As it happens, I posted some cleanups for this last week:
https://patchew.org/QEMU/20200302175829.2183-1-richard.hender...@linaro.org/
Some of them have been queued to Peter's target-arm.next branch,
but that hasn't made it to master yet.
** Changed in: qemu
Status: New => In Progress
** Changed in: qemu
Assignee: (unassigned) => Richard Henderson (rth)
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https://bugs.launchpad.net/bugs/1867072
Title:
ARM: tag bits cleared in FAR_EL1
Status in QEMU:
In Progress
Bug description:
The ARM Architecture Reference Manual provides the following for
FAR_EL1:
"For a Data Abort or Watchpoint exception, if address tagging is
enabled for the address accessed by the data access that caused the
exception, then this field includes the tag."
However, I have found that the tag bits in FAR_EL1 are always clear,
even if the tag bits were set in the original access.
I can reproduce the problem on both 4.1.1 and master
(6e8a73e911f066527e775e04b98f31ebd19db600).
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