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lib: sbi_pmu: Add SBI PMU event info function details.

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The SBI v3.0 introduced a new function to query about the events
without invoking CFG_MATCH. This allows supervisor software to
identify which events are supported on the platform with single
SBI call instead of a CFG_MATCH for each event.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Atish Patra
2024-11-19 11:34:37 -08:00
committed by Anup Patel
parent cf196d80aa
commit 05970d273c
1 changed files with 9 additions and 0 deletions
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9
include/sbi/sbi_ecall_interface.h
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@@ -12,6 +12,8 @@
/* clang-format off */
#include <sbi/sbi_types.h>
/* SBI Extension IDs */
#define SBI_EXT_0_1_SET_TIMER 0x0
#define SBI_EXT_0_1_CONSOLE_PUTCHAR 0x1
@@ -107,6 +109,7 @@
#define SBI_EXT_PMU_COUNTER_FW_READ 0x5
#define SBI_EXT_PMU_COUNTER_FW_READ_HI 0x6
#define SBI_EXT_PMU_SNAPSHOT_SET_SHMEM 0x7
#define SBI_EXT_PMU_EVENT_GET_INFO 0x8
/* SBI function IDs for DBTR extension */
#define SBI_EXT_DBTR_NUM_TRIGGERS 0x0
@@ -256,6 +259,12 @@ enum sbi_pmu_ctr_type {
SBI_PMU_CTR_TYPE_FW,
};
struct sbi_pmu_event_info {
uint32_t event_idx;
uint32_t output;
uint64_t event_data;
};
/* Helper macros to decode event idx */
#define SBI_PMU_EVENT_IDX_MASK 0xFFFFF
#define SBI_PMU_EVENT_IDX_TYPE_OFFSET 16