opensbi.git/lib/sbi/sbi_sse.c, branch master

lib: sbi: sse: clear SPV for non-virtualized events

2026-09-01T07:27:33Z

SSE injection sets hstatus.SPV to the virtualization state of the interrupted context before entering the supervisor handler. This patch completes that existing requirement and does not change the SSE ABI. The existing code sets SPV when the interrupted context is virtualized, but leaves it unchanged otherwise. A stale SPV value can therefore make an event that interrupted host execution appear to have interrupted a guest. Event completion can then resume with virtualization enabled. Clear SPV when the interrupted context is not virtualized so the handler-visible state matches the interrupted context. This also lets supervisor software, such as the Linux PMU and perf code, reliably tell whether an SSE interrupted host or virtualized execution. Fixes: c8cdf01d8f3a ("lib: sbi: Add support for Supervisor Software Events extension") Signed-off-by: Zhanpeng Zhang Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260731071820.7318-1-zhangzhanpeng.jasper@bytedance.com Signed-off-by: Anup Patel

lib: sbi: fix sse_event_inject() status setting

2026-03-10T07:51:29Z

sse_event_inject() currently sets all status bits to 1 except for SBI_SSE_ATTR_STATUS_PENDING_OFFSET which it sets to zero. Instead of overwriting all the values of the status bits, sse_event_inject() is only expected to clear SBI_SSE_ATTR_STATUS_PENDING_OFFSET. Fix sse_event_inject() to only do the clearing. Signed-off-by: Charlie Jenkins Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260302-event_inject_fix-v1-1-e88952b03aa4@gmail.com Signed-off-by: Anup Patel

lib: sbi: Replace sbi_hart_pmp_xyz() and sbi_hart_map/unmap_addr()

2025-12-16T14:46:47Z

The sbi_hart_pmp_xyz() and sbi_hart_map/unmap_addr() functions can now be replaced by various sbi_hart_protection_xyz() functions. Signed-off-by: Anup Patel Link: https://lore.kernel.org/r/20251209135235.423391-5-apatel@ventanamicro.com Signed-off-by: Anup Patel

lib: sbi: sse: Add support for SSTATUS.SDT

2025-03-27T12:46:44Z

Similarly to what is done for SPELP, handle SSTATUS.SDT upon event injection. In order to mimick an interrupt, set SDT to 1 for injection and save its previous value in interrupted_flags[5:5]. Restore it upon completion. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones

lib: sbi: sse: Add support for SSTATUS.SPELP

2025-03-27T12:46:28Z

As raised during the ARC review, SPELP was not handled during the event injection process. Save it as part of the interrupted flags, clear it before injecting the event and restore it after completion. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones

lib: sbi: sse: Remove superfluous parenthesis around MSTATUS_* values

2025-03-27T12:46:19Z

For some reason, there was a pair of useless parenthesis around MSTATUS_* value usage. Remove them. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones

lib: sbi: sse: Rename STATUS* interrupted flags to SSTATUS*

2025-03-27T12:45:44Z

As raised by Andrew on the kvm-unit-test review, this flags are meant to hold SSTATUS bits in the specification. Rename them to match that. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones

lib: sbi: sse: Return SBI_EDENIED for read only parameters.

2025-03-27T12:45:25Z

The SSE specification did specified that read only parameters should return SBI_EBADRANGE but was modified recently to return SBI_EDENIED. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones

lib: sbi: sse: Remove printf from sbi_sse_exit()

2025-03-27T12:45:10Z

This printf is mainly useful for debugging, remove it. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones

lib: sbi: sse: Update SSE event ids

2025-03-27T12:33:41Z

The latest specification added new high priority RAS events and renamed the PMU to PMU_OVERFLOW. Signed-off-by: Clément Léger Reviewed-by: Andrew Jones