On Sat, 17 Sep 2022 02:06:00 +0100, Reiji Watanabe <reijiw@xxxxxxxxxx> wrote: > > Add a test case for KVM_GUESTDBG_SINGLESTEP to the debug-exceptions test. > The test enables single-step execution from userspace, and check if the > exit to userspace occurs for each instruction that is stepped. > Set the default number of the test iterations to a number of iterations > sufficient to always reproduce the problem that the previous patch fixes > on an Ampere Altra machine. A possibly more aggressive version of this test would be to force a (short lived) timer to fire on the same CPU, forcing an exit. This should hopefully result in a more predictable way to trigger the issue. But that's a reasonable test as a start. Thanks, M. -- Without deviation from the norm, progress is not possible.
