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lib: sbi: Implement firmware counters

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RISC-V SBI v0.3 specification defines a set of firmware events that can
provide additional information about the current firmware context. All
of the firmware event monitoring are enabled now. The firmware
events must be defined as raw perf event with MSB set as specified in the
specification.

Reviewed-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Atish Patra authored and Anup Patel committed 2021-07-11 10:38:23 +05:30
1 parent 37f9b0f2f2
commit 764a17d852
6 files changed
+60
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lib/sbi/sbi_trap.c
+7
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@@ -16,6 +16,7 @@
#include <sbi/sbi_illegal_insn.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_misaligned_ldst.h>
#include <sbi/sbi_pmu.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_trap.h>
@@ -257,6 +258,12 @@ struct sbi_trap_regs *sbi_trap_handler(struct sbi_trap_regs *regs)
rc = sbi_ecall_handler(regs);
msg = "ecall handler failed";
break;
case CAUSE_LOAD_ACCESS:
sbi_pmu_ctr_incr_fw(SBI_PMU_FW_ACCESS_LOAD);
break;
case CAUSE_STORE_ACCESS:
sbi_pmu_ctr_incr_fw(SBI_PMU_FW_ACCESS_STORE);
break;
default:
/* If the trap came from S or U mode, redirect it there */
trap.epc = regs->mepc;