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lib: sbi_pmu: Add PMU snapshot definitions

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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 <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Atish Patra
2023-12-07 14:23:49 -08:00
committed by Anup Patel
parent 93da66b7d4
commit ee725174ba
4 changed files with 14 additions and 1 deletions
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6
include/sbi/sbi_ecall_interface.h
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@@ -103,6 +103,7 @@
#define SBI_EXT_PMU_COUNTER_STOP 0x4
#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
/** General pmu event codes specified in SBI PMU extension */
enum sbi_pmu_hw_generic_events_t {
@@ -241,9 +242,11 @@ enum sbi_pmu_ctr_type {
/* Flags defined for counter start function */
#define SBI_PMU_START_FLAG_SET_INIT_VALUE (1 << 0)
#define SBI_PMU_START_FLAG_INIT_FROM_SNAPSHOT (1 << 1)
/* Flags defined for counter stop function */
#define SBI_PMU_STOP_FLAG_RESET (1 << 0)
#define SBI_PMU_STOP_FLAG_TAKE_SNAPSHOT (1 << 1)
/* SBI function IDs for DBCN extension */
#define SBI_EXT_DBCN_CONSOLE_WRITE 0x0
@@ -309,8 +312,9 @@ enum sbi_cppc_reg_id {
#define SBI_ERR_ALREADY_AVAILABLE -6
#define SBI_ERR_ALREADY_STARTED -7
#define SBI_ERR_ALREADY_STOPPED -8
#define SBI_ERR_NO_SHMEM -9
#define SBI_LAST_ERR SBI_ERR_ALREADY_STOPPED
#define SBI_LAST_ERR SBI_ERR_NO_SHMEM
/* clang-format on */