opensbi.git/include/sbi/sbi_ecall_interface.h, branch v1.4

lib: sbi_pmu: Add PMU snapshot definitions

2023-12-08T17:20:21Z

OpenSBI doesn't support SBI PMU snapshot yet as there is not much benefit unless the multiple counters overflow at the same time. Just add the definition and return not supported error at this moment. The default returned error is also not supported. Thus, no functional change intended. Reviewed-by: Anup Patel Signed-off-by: Atish Patra

lib: sbi_pmu: Align the event type offset as per SBI specification

2023-04-07T04:36:59Z

The bits encoded in event_idx[19:16] indicate the event type, with an offset of 16 instead of 20. Fixes: 13d40f21d588 ("lib: sbi: Add PMU support") Signed-off-by: Yu Chien Peter Lin Reviewed-by: Andrew Jones Reviewed-by: Xiang W

include: Add defines for SBI CPPC extension

2023-04-07T04:05:06Z

Add SBI CPPC extension related defines to the SBI ecall interface header. Signed-off-by: Sunil V L Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi_pmu: Reserve space for implementation specific firmware events

2023-03-10T08:30:22Z

We reserve space for SBI implementation specific custom firmware events which can be used by M-mode firmwares and HS-mode hypervisors for their own use. This reserved space is intentionally large to ensure that SBI implementation has enough space to accommodate platform specific firmware events as well. Signed-off-by: Mayuresh Chitale Reviewed-by: Atish Patra Reviewed-by: Anup Patel

lib: sbi_pmu: Implement sbi_pmu_counter_fw_read_hi

2023-03-10T08:30:07Z

To support 64 bit firmware counters on RV32 systems, we implement sbi_pmu_counter_fw_read_hi() which returns the upper 32 bits of the firmware counter value. On RV64 (or higher) systems, this function will always return zero. Signed-off-by: Mayuresh Chitale Reviewed-by: Atish Patra Reviewed-by: Anup Patel

lib: sbi: Add system suspend skeleton

2023-02-27T14:13:52Z

Add the SUSP extension probe and ecall support, but for now the system suspend function is just a stub. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel

include: Add defines for SBI debug console extension

2023-02-09T16:51:24Z

We add SBI debug console extension related defines to the SBI ecall interface header. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones Reviewed-by: Atish Patra Reviewed-by: Bin Meng Reviewed-by: Xiang W

lib: sbi: Add the bound check for events during config match

2022-07-30T05:52:50Z

Currently, there is no sanity check for firmware event code. We don't see any issue as Linux kernel driver does a bound check on firmware events already. However, OpenSBI can't assume sane supervisor mode software always. Thus, an invalid event idx can cause a buffer overflow error. For hardware events, the match will fail for invalid event code anyways. However, a search is unecessary if event code is invalid. Add a event ID validation function to solve the issue. Signed-off-by: Atish Patra Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi: Add PMU support

2021-07-11T04:53:18Z

RISC-V SBI v0.3 specification defined a PMU extension to configure/start/stop the hardware/firmware pmu events. Implement PMU support in OpenSBI library. The implementation is agnostic of event to counter mapping & mhpmevent value configuration. That means, it expects platform hooks will be used to set up the mapping and provide the mhpmevent value at runtime. Reviewed-by: Anup Patel Signed-off-by: Atish Patra

include: sbi: SBI function IDs for RFENCE extension

2021-03-12T04:02:53Z

The SBI function IDs for RFENCE extension must match the SBI specification. Signed-off-by: Heinrich Schuchardt Reviewed-by: Atish Patra