linux-kernel - [RFC 5/6] RISC-V: Add RISC-V SBI PMU extension definitions

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Message-Id: <20210319230106.2186694-6-atish.patra@wdc.com>
Date:   Fri, 19 Mar 2021 16:01:05 -0700
From:   Atish Patra <atish.patra@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Atish Patra <atish.patra@....com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Anup Patel <anup.patel@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Guo Ren <guoren@...ux.alibaba.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Will Deacon <will@...nel.org>
Subject: [RFC 5/6] RISC-V: Add RISC-V SBI PMU extension definitions

This patch adds all the definitions defined by the SBI PMU extension.

Signed-off-by: Atish Patra <atish.patra@....com>
---
 arch/riscv/include/asm/sbi.h | 80 ++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 99895d9c3bdd..01b261bc6b68 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_IPI = 0x735049,
 	SBI_EXT_RFENCE = 0x52464E43,
 	SBI_EXT_HSM = 0x48534D,
+	SBI_EXT_PMU = 0x504D55,
 };
 
 enum sbi_ext_base_fid {
@@ -70,6 +71,85 @@ enum sbi_hsm_hart_status {
 	SBI_HSM_HART_STATUS_STOP_PENDING,
 };
 
+
+enum sbi_ext_pmu_fid {
+	SBI_EXT_PMU_NUM_COUNTERS = 0,
+	SBI_EXT_PMU_COUNTER_GET_INFO,
+	SBI_EXT_PMU_COUNTER_CFG_MATCH,
+	SBI_EXT_PMU_COUNTER_FW_READ,
+	SBI_EXT_PMU_COUNTER_START,
+	SBI_EXT_PMU_COUNTER_STOP,
+};
+
+#define RISCV_PMU_RAW_EVENT_MASK 0x7FFFFFFF
+#define RISCV_PMU_RAW_EVENT_IDX 0x20000
+
+/* SBI PMU Hardware general events */
+enum sbi_pmu_hw_generic_events_t {
+	SBI_PMU_HW_NO_EVENT = 0,
+	SBI_PMU_HW_CPU_CYCLES,
+	SBI_PMU_HW_INSTRUCTIONS,
+	SBI_PMU_HW_CACHE_REFERENCES,
+	SBI_PMU_HW_CACHE_MISSES,
+	SBI_PMU_HW_BRANCH_INSTRUCTIONS,
+	SBI_PMU_HW_BRANCH_MISSES,
+	SBI_PMU_HW_BUS_CYCLES,
+	SBI_PMU_HW_STALLED_CYCLES_FRONTEND,
+	SBI_PMU_HW_STALLED_CYCLES_BACKEND,
+	SBI_PMU_HW_REF_CPU_CYCLES,
+	SBI_PMU_HW_MISALIGNED_LOAD,
+	SBI_PMU_HW_MISALIGNED_STORE,
+
+	SBI_PMU_HW_GENERIC_MAX,
+};
+
+/**
+ * Special "firmware" events provided by the firmware, even if the hardware
+ * does not support performance events. These events are encoded as a raw
+ * event type in Linux kernel perf framework.
+ */
+enum sbi_pmu_fw_generic_events_t {
+	SBI_PMU_FW_MISALIGNED_LOAD	= 0,
+	SBI_PMU_FW_MISALIGNED_STORE	= 1,
+	SBI_PMU_FW_ACCESS_LOAD		= 2,
+	SBI_PMU_FW_ACCESS_STORE		= 3,
+	SBI_PMU_FW_ILLEGAL_INSN		= 4,
+	SBI_PMU_FW_SET_TIMER		= 5,
+	SBI_PMU_FW_IPI_SENT		= 6,
+	SBI_PMU_FW_IPI_RECVD		= 7,
+	SBI_PMU_FW_FENCE_I_SENT		= 8,
+	SBI_PMU_FW_FENCE_I_RECVD	= 9,
+	SBI_PMU_FW_SFENCE_VMA_SENT	= 10,
+	SBI_PMU_FW_SFENCE_VMA_RCVD	= 11,
+	SBI_PMU_FW_SFENCE_VMA_ASID_SENT	= 12,
+	SBI_PMU_FW_SFENCE_VMA_ASID_RCVD	= 13,
+
+	SBI_PMU_FW_HFENCE_GVMA_SENT	= 14,
+	SBI_PMU_FW_HFENCE_GVMA_RCVD	= 15,
+	SBI_PMU_FW_HFENCE_GVMA_VMID_SENT = 16,
+	SBI_PMU_FW_HFENCE_GVMA_VMID_RCVD = 17,
+
+	SBI_PMU_FW_HFENCE_VVMA_SENT	= 18,
+	SBI_PMU_FW_HFENCE_VVMA_RCVD	= 19,
+	SBI_PMU_FW_HFENCE_VVMA_ASID_SENT = 20,
+	SBI_PMU_FW_HFENCE_VVMA_ASID_RCVD = 21,
+	SBI_PMU_FW_MAX,
+};
+
+/* SBI PMU event types */
+enum sbi_pmu_event_type {
+	SBI_PMU_EVENT_TYPE_HW = 0x0,
+	SBI_PMU_EVENT_TYPE_CACHE = 0x1,
+	SBI_PMU_EVENT_TYPE_RAW = 0x2,
+	SBI_PMU_EVENT_TYPE_FW = 0xf,
+};
+
+/* SBI PMU event types */
+enum sbi_pmu_ctr_type {
+	SBI_PMU_CTR_TYPE_HW = 0x0,
+	SBI_PMU_CTR_TYPE_FW,
+};
+
 #define SBI_SPEC_VERSION_DEFAULT	0x1
 #define SBI_SPEC_VERSION_MAJOR_SHIFT	24
 #define SBI_SPEC_VERSION_MAJOR_MASK	0x7f
-- 
2.25.1