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lib: sbi: Add PMU support

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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 <anup.patel@wdc.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Atish Patra
2021-07-10 09:18:11 -07:00
committed by Anup Patel
parent e7cc7a3ab2
commit 13d40f21d5
6 changed files with 844 additions and 1 deletions
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11
lib/sbi/sbi_init.c
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@@ -19,6 +19,7 @@
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_pmu.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_string.h>
#include <sbi/sbi_timer.h>
@@ -251,6 +252,10 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
if (rc)
sbi_hart_hang();
rc = sbi_pmu_init(scratch, TRUE);
if (rc)
sbi_hart_hang();
sbi_boot_print_banner(scratch);
rc = sbi_platform_irqchip_init(plat, TRUE);
@@ -352,6 +357,10 @@ static void init_warm_startup(struct sbi_scratch *scratch, u32 hartid)
if (rc)
sbi_hart_hang();
rc = sbi_pmu_init(scratch, FALSE);
if (rc)
sbi_hart_hang();
rc = sbi_platform_irqchip_init(plat, FALSE);
if (rc)
sbi_hart_hang();
@@ -515,6 +524,8 @@ void __noreturn sbi_exit(struct sbi_scratch *scratch)
sbi_platform_early_exit(plat);
sbi_pmu_exit(scratch);
sbi_timer_exit(scratch);
sbi_ipi_exit(scratch);