opensbi.git/include/sbi/sbi_pmu.h, branch master

lib: sbi_pmu: Add FW counter index validation when reading high bits on RV64

2026-02-21T04:50:41Z

Currently, when we attempt to read the upper 32 bits of a firmware counter on RV64 or higher, we just set `sbiret.value` to 0 without validating the counter index. The SBI specification requires us to set `sbiret.error` to `SBI_ERR_INVALID_PARAM` if the counter index points to a hardware counter or an invalid counter. Add a validation check to ensure compliance with the specification on RV64 or higher. Fixes: 51951d9e9af8 ("lib: sbi_pmu: Implement sbi_pmu_counter_fw_read_hi") Signed-off-by: James Raphael Tiovalen Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260125090643.190748-1-jamestiotio@gmail.com Signed-off-by: Anup Patel

lib: sbi: pmu: fix usage of sbi_pmu_irq_bit()

2025-01-30T05:00:45Z

While sbi_pmu_irq_bit() was used to delegate irq to S-mode, LCOFIP usage was still hardcoded in various places. This led to change the returned value of sbi_pmu_irq_bit() to be a bit number rather than a bit mask since it returns an 'int' and we need to obtain the bit number itself to handle it in the IRQs handlers. Add a similar function to return the irq mask which can also be used where the mask is required rather than the bit itself. Signed-off-by: Clément Léger Reviewed-by: Samuel Holland Reviewed-by: Atish Patra

lib: sbi_pmu: Implement SBI PMU event info function

2024-12-02T04:22:55Z

Allow the supervisor software to query about the event using the new function. This supports both firmware and hardware events. The hardware event presence is verified hw_event_map which is populated via PMU device tree node. The firmware event presence is checked through event validation function which should take care of both standard and platform firmware events. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: sbi: Add SSE support for PMU events

2024-04-05T11:39:39Z

Add SSE callbacks registration to PMU driver in order to disable interrupt delegation for PMU interrupts. When interrupts are undelegated send the PMU SSE event upon LCOFIP IRQ. Signed-off-by: Clément Léger Reviewed-by: Anup Patel

lib: sbi_pmu: Fix the counter info function

2023-12-08T17:20:23Z

The counter info should only return valid hardware counters for the ones set in the counter mask. Otherwise, it will report incorrect number of hardware counters to the supervisor if the platform has discontiguous counters. Fixes: c744ed77b18c ("lib: sbi_pmu: Enable noncontigous hpm event and counters") Signed-off-by: Atish Patra Reviewed-by: Xiang W Reviewed-by: Anup Patel

sbi: sbi_pmu: Add hw_counter_filter_mode() to pmu device

2023-12-06T12:00:01Z

Add support for custom PMU extensions to set inhibit bits on custom CSRs by introducing the PMU device callback hw_counter_filter_mode(). This allows the perf tool to restrict event counting under a specified privileged mode by appending a modifier, e.g. perf record -e event:k to count events only happening in kernel mode. Signed-off-by: Yu Chien Peter Lin Reviewed-by: Leo Yu-Chi Liang Reviewed-by: Atish Patra Reviewed-by: Anup Patel

lib: sbi_pmu: Add hartid parameter PMU device ops

2023-03-10T08:30:33Z

Platform specific firmware event handler may leverage the hartid to program per hart specific registers for a given counter. Signed-off-by: Mayuresh Chitale Reviewed-by: Atish Patra Reviewed-by: Anup Patel

lib: sbi_pmu: Introduce fw_counter_write_value API

2023-03-10T08:30:30Z

Add fw_counter_write_value API for platform specific firmware events which separates setting the counter's initial value from starting the counter. This is required so that the fw_event_data array can be reused to save the event data received. Signed-off-by: Mayuresh Chitale Reviewed-by: Anup Patel

lib: sbi_pmu: Update sbi_pmu dev ops

2023-03-10T08:30:26Z

Update fw_event_validate_code, fw_counter_match_code and fw_counter_start ops which used a 32 bit event code to use the 64 bit event data instead. Signed-off-by: Mayuresh Chitale Reviewed-by: Anup Patel

lib: sbi_pmu: add callback for counter width

2023-03-10T08:16:52Z

This patch adds a callback to fetch the number of bits implemented for a custom firmware counter. If the callback fails or is not implemented then width defaults to 63. Signed-off-by: Mayuresh Chitale Reviewed-by: Atish Patra Reviewed-by: Anup Patel