Version 1.0-rc3 of the RISC-V Supervisor Binary Interface Specification has added the Performance Monitoring Unit Extension.

The sbi command should be able to detect it.

Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com --- At this point it is not necessary to add the full interface descritption of the PMU extension in sbi.h. We can add it later if we ever have to make use of the extension. --- arch/riscv/include/asm/sbi.h | 1 + cmd/riscv/sbi.c | 1 + 2 files changed, 2 insertions(+)

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index bfcd204953..76453121ea 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -27,6 +27,7 @@ enum sbi_ext_id { SBI_EXT_RFENCE = 0x52464E43, SBI_EXT_HSM = 0x48534D, SBI_EXT_SRST = 0x53525354, + SBI_EXT_PMU = 0x504D55, };

enum sbi_ext_base_fid { diff --git a/cmd/riscv/sbi.c b/cmd/riscv/sbi.c index c4a9c840f3..8349123925 100644 --- a/cmd/riscv/sbi.c +++ b/cmd/riscv/sbi.c @@ -44,6 +44,7 @@ static struct sbi_ext extensions[] = { { SBI_EXT_RFENCE, "RFENCE Extension" }, { SBI_EXT_HSM, "Hart State Management Extension" }, { SBI_EXT_SRST, "System Reset Extension" }, + { SBI_EXT_PMU, "Performance Monitoring Unit Extension" }, };

static int do_sbi(struct cmd_tbl *cmdtp, int flag, int argc,