142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* RISC-V SBI specific definitions
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*
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* Copyright (C) 2024 Rivos Inc.
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*/
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#ifndef SELFTEST_KVM_SBI_H
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#define SELFTEST_KVM_SBI_H
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/* SBI spec version fields */
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#define SBI_SPEC_VERSION_DEFAULT 0x1
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#define SBI_SPEC_VERSION_MAJOR_SHIFT 24
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#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
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#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff
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/* SBI return error codes */
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#define SBI_SUCCESS 0
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#define SBI_ERR_FAILURE -1
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#define SBI_ERR_NOT_SUPPORTED -2
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#define SBI_ERR_INVALID_PARAM -3
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#define SBI_ERR_DENIED -4
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#define SBI_ERR_INVALID_ADDRESS -5
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#define SBI_ERR_ALREADY_AVAILABLE -6
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#define SBI_ERR_ALREADY_STARTED -7
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#define SBI_ERR_ALREADY_STOPPED -8
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#define SBI_EXT_EXPERIMENTAL_START 0x08000000
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#define SBI_EXT_EXPERIMENTAL_END 0x08FFFFFF
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#define KVM_RISCV_SELFTESTS_SBI_EXT SBI_EXT_EXPERIMENTAL_END
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#define KVM_RISCV_SELFTESTS_SBI_UCALL 0
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#define KVM_RISCV_SELFTESTS_SBI_UNEXP 1
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enum sbi_ext_id {
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SBI_EXT_BASE = 0x10,
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SBI_EXT_STA = 0x535441,
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SBI_EXT_PMU = 0x504D55,
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};
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enum sbi_ext_base_fid {
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SBI_EXT_BASE_GET_SPEC_VERSION = 0,
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SBI_EXT_BASE_GET_IMP_ID,
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SBI_EXT_BASE_GET_IMP_VERSION,
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SBI_EXT_BASE_PROBE_EXT = 3,
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};
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enum sbi_ext_pmu_fid {
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SBI_EXT_PMU_NUM_COUNTERS = 0,
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SBI_EXT_PMU_COUNTER_GET_INFO,
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SBI_EXT_PMU_COUNTER_CFG_MATCH,
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SBI_EXT_PMU_COUNTER_START,
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SBI_EXT_PMU_COUNTER_STOP,
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SBI_EXT_PMU_COUNTER_FW_READ,
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SBI_EXT_PMU_COUNTER_FW_READ_HI,
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SBI_EXT_PMU_SNAPSHOT_SET_SHMEM,
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};
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union sbi_pmu_ctr_info {
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unsigned long value;
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struct {
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unsigned long csr:12;
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unsigned long width:6;
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#if __riscv_xlen == 32
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unsigned long reserved:13;
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#else
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unsigned long reserved:45;
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#endif
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unsigned long type:1;
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};
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};
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struct riscv_pmu_snapshot_data {
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u64 ctr_overflow_mask;
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u64 ctr_values[64];
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u64 reserved[447];
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};
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struct sbiret {
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long error;
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long value;
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};
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/** General pmu event codes specified in SBI PMU extension */
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enum sbi_pmu_hw_generic_events_t {
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SBI_PMU_HW_NO_EVENT = 0,
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SBI_PMU_HW_CPU_CYCLES = 1,
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SBI_PMU_HW_INSTRUCTIONS = 2,
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SBI_PMU_HW_CACHE_REFERENCES = 3,
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SBI_PMU_HW_CACHE_MISSES = 4,
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SBI_PMU_HW_BRANCH_INSTRUCTIONS = 5,
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SBI_PMU_HW_BRANCH_MISSES = 6,
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SBI_PMU_HW_BUS_CYCLES = 7,
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SBI_PMU_HW_STALLED_CYCLES_FRONTEND = 8,
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SBI_PMU_HW_STALLED_CYCLES_BACKEND = 9,
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SBI_PMU_HW_REF_CPU_CYCLES = 10,
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SBI_PMU_HW_GENERAL_MAX,
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};
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/* SBI PMU counter types */
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enum sbi_pmu_ctr_type {
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SBI_PMU_CTR_TYPE_HW = 0x0,
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SBI_PMU_CTR_TYPE_FW,
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};
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/* Flags defined for config matching function */
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#define SBI_PMU_CFG_FLAG_SKIP_MATCH BIT(0)
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#define SBI_PMU_CFG_FLAG_CLEAR_VALUE BIT(1)
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#define SBI_PMU_CFG_FLAG_AUTO_START BIT(2)
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#define SBI_PMU_CFG_FLAG_SET_VUINH BIT(3)
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#define SBI_PMU_CFG_FLAG_SET_VSINH BIT(4)
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#define SBI_PMU_CFG_FLAG_SET_UINH BIT(5)
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#define SBI_PMU_CFG_FLAG_SET_SINH BIT(6)
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#define SBI_PMU_CFG_FLAG_SET_MINH BIT(7)
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/* Flags defined for counter start function */
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#define SBI_PMU_START_FLAG_SET_INIT_VALUE BIT(0)
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#define SBI_PMU_START_FLAG_INIT_SNAPSHOT BIT(1)
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/* Flags defined for counter stop function */
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#define SBI_PMU_STOP_FLAG_RESET BIT(0)
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#define SBI_PMU_STOP_FLAG_TAKE_SNAPSHOT BIT(1)
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struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
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unsigned long arg1, unsigned long arg2,
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unsigned long arg3, unsigned long arg4,
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unsigned long arg5);
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bool guest_sbi_probe_extension(int extid, long *out_val);
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/* Make SBI version */
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static inline unsigned long sbi_mk_version(unsigned long major,
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unsigned long minor)
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{
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return ((major & SBI_SPEC_VERSION_MAJOR_MASK) << SBI_SPEC_VERSION_MAJOR_SHIFT)
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| (minor & SBI_SPEC_VERSION_MINOR_MASK);
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}
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unsigned long get_host_sbi_spec_version(void);
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#endif /* SELFTEST_KVM_SBI_H */
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