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KVM: selftests: Add exception handling support for aarch64

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Add the infrastructure needed to enable exception handling in aarch64
selftests. The exception handling defaults to an unhandled-exception
handler which aborts the test, just like x86. These handlers can be
overridden by calling vm_install_exception_handler(vector) or
vm_install_sync_handler(vector, ec). The unhandled exception reporting
from the guest is done using the ucall type introduced in a previous
commit, UCALL_UNHANDLED.

The exception handling code is inspired on kvm-unit-tests.

Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210611011020.3420067-6-ricarkol@google.com
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Ricardo Koller 2021-06-10 18:10:19 -07:00 • committed by Marc Zyngier
commit e3db7579ef
4 changed files with 287 additions and 1 deletions
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