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| author | Scott Cheloha <cheloha@linux.ibm.com> | 2020-07-27 21:46:04 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-09-02 04:00:20 +0300 |
| commit | 59562b5c33d6ff3685509ed58b2ed3c5b5712704 (patch) | |
| tree | 56e0cadd547e30a4acd08a2c81a702ca9e9aa253 /arch/powerpc/include/asm/hvcall.h | |
| parent | 82eb1792426f8a171cdaa6cfccb63c39f55bc9bd (diff) | |
| download | linux-59562b5c33d6ff3685509ed58b2ed3c5b5712704.tar.xz | |
powerpc/perf: consolidate GPCI hcall structs into asm/hvcall.h
The H_GetPerformanceCounterInfo (GPCI) hypercall input/output structs are
useful to modules outside of perf/, so move them into asm/hvcall.h to live
alongside the other powerpc hypercall structs.
Leave the perf-specific GPCI stuff in perf/hv-gpci.h.
Signed-off-by: Scott Cheloha <cheloha@linux.ibm.com>
Acked-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200727184605.2945095-1-cheloha@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/hvcall.h')
| -rw-r--r-- | arch/powerpc/include/asm/hvcall.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index fbb377055471..e8f116a425f9 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -560,6 +560,42 @@ struct hv_guest_state { /* Latest version of hv_guest_state structure */ #define HV_GUEST_STATE_VERSION 1 +/* + * From the document "H_GetPerformanceCounterInfo Interface" v1.07 + * + * H_GET_PERF_COUNTER_INFO argument + */ +struct hv_get_perf_counter_info_params { + __be32 counter_request; /* I */ + __be32 starting_index; /* IO */ + __be16 secondary_index; /* IO */ + __be16 returned_values; /* O */ + __be32 detail_rc; /* O, only needed when called via *_norets() */ + + /* + * O, size each of counter_value element in bytes, only set for version + * >= 0x3 + */ + __be16 cv_element_size; + + /* I, 0 (zero) for versions < 0x3 */ + __u8 counter_info_version_in; + + /* O, 0 (zero) if version < 0x3. Must be set to 0 when making hcall */ + __u8 counter_info_version_out; + __u8 reserved[0xC]; + __u8 counter_value[]; +} __packed; + +#define HGPCI_REQ_BUFFER_SIZE 4096 +#define HGPCI_MAX_DATA_BYTES \ + (HGPCI_REQ_BUFFER_SIZE - sizeof(struct hv_get_perf_counter_info_params)) + +struct hv_gpci_request_buffer { + struct hv_get_perf_counter_info_params params; + uint8_t bytes[HGPCI_MAX_DATA_BYTES]; +} __packed; + #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_HVCALL_H */ |