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219c101fa7
Sleep on WFI until the VTIMER is due but allow ourselves to be woken up on IPI. In this implementation IPI is blocked on the CPU thread at startup and pselect() is used to atomically unblock the signal and begin sleeping. The signal is sent unconditionally so there's no need to worry about races between actually sleeping and the "we think we're sleeping" state. It may lead to an extra wakeup but that's better than missing it entirely. Signed-off-by: Peter Collingbourne <pcc@google.com> Signed-off-by: Alexander Graf <agraf@csgraf.de> Acked-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Sergio Lopez <slp@redhat.com> Message-id: 20210916155404.86958-6-agraf@csgraf.de [agraf: Remove unused 'set' variable, always advance PC on WFX trap, support vm stop / continue operations and cntv offsets] Signed-off-by: Alexander Graf <agraf@csgraf.de> Acked-by: Roman Bolshakov <r.bolshakov@yadro.com> Reviewed-by: Sergio Lopez <slp@redhat.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> |
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| nios2 | ||
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| Kconfig | ||
| meson.build | ||