The wfi exception trigger behavior should take into account user mode,
hstatus.vtw, and the fact the an wfi might raise different types of
exceptions depending on various factors:
If supervisor mode is not present:
- an illegal instruction exception should be generated if user mode
executes and wfi instruction and mstatus.tw = 1.
If supervisor mode is present:
- when a wfi instruction is executed, an illegal exception should be triggered
if either the current mode is user or the mode is supervisor and mstatus.tw is
set.
Plus, if the hypervisor extensions are enabled:
- a virtual instruction exception should be raised when a wfi is executed from
virtual-user or virtual-supervisor and hstatus.vtw is set.
Signed-off-by: Jose Martins <josemartins90@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210420213656.85148-1-josemartins90@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
* Add a quick test helper macro to test_x86.c
* Add regression tests for bswap and rex prefixes
* Properly ignore REX prefixes when appropriate
* Fix bswap ax emulator detection
* update zig bindings to Zig 0.12.0
* support zig package manager
* Fix zig macos ci build
* Make the macos build use 1 process instead of hitting the macos
process limit immediately, utilize the build.zig `-Dparallel
false` option for macos ci
* Split the macos ci into a new build stage (out of the ubuntu,
macos build maxtrix), to allow for multiple architecture builds
in the future after the zig bindings improve
While the bindings conditionally compile code based on the cfg
flags, we still include the architecture support in emitted rust
code. This patch removes the ability to refer to architectures
that cannot possibly be supported.
