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| author | Pierrick Bouvier <pierrick.bouvier@linaro.org> | 2024-03-05 12:09:51 +0000 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2024-03-06 12:35:23 +0000 |
| commit | 8042e2eadfd61dcdae321c3632f06d188521bdf5 (patch) | |
| tree | fc27f015b482beb6e8e18f0edca13bfd2c7b27b1 /include/qemu/qemu-plugin.h | |
| parent | a3c2cf0b891d00ef502e9902baa9fb7fe1f8e7a3 (diff) | |
| download | qemu-8042e2eadfd61dcdae321c3632f06d188521bdf5.zip qemu-8042e2eadfd61dcdae321c3632f06d188521bdf5.tar.gz qemu-8042e2eadfd61dcdae321c3632f06d188521bdf5.tar.bz2 | |
plugins: define qemu_plugin_u64
Additionally to the scoreboard, we define a qemu_plugin_u64, which is a
simple struct holding a pointer to a scoreboard, and a given offset.
This allows to have a scoreboard containing structs, without having to
bring offset to operate on a specific field.
Since most of the plugins are simply collecting a sum of per-cpu values,
qemu_plugin_u64 directly support this operation as well.
All inline operations defined later will use a qemu_plugin_u64 as input.
New functions:
- qemu_plugin_u64_add
- qemu_plugin_u64_get
- qemu_plugin_u64_set
- qemu_plugin_u64_sum
New macros:
- qemu_plugin_scoreboard_u64
- qemu_plugin_scoreboard_u64_in_struct
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20240304130036.124418-3-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-16-alex.bennee@linaro.org>
Diffstat (limited to 'include/qemu/qemu-plugin.h')
| -rw-r--r-- | include/qemu/qemu-plugin.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index 31c468d..ebf9a64 100644 --- a/include/qemu/qemu-plugin.h +++ b/include/qemu/qemu-plugin.h @@ -226,6 +226,17 @@ struct qemu_plugin_insn; struct qemu_plugin_scoreboard; /** + * typedef qemu_plugin_u64 - uint64_t member of an entry in a scoreboard + * + * This field allows to access a specific uint64_t member in one given entry, + * located at a specified offset. Inline operations expect this as entry. + */ +typedef struct { + struct qemu_plugin_scoreboard *score; + size_t offset; +} qemu_plugin_u64; + +/** * enum qemu_plugin_cb_flags - type of callback * * @QEMU_PLUGIN_CB_NO_REGS: callback does not access the CPU's regs @@ -784,4 +795,45 @@ QEMU_PLUGIN_API void *qemu_plugin_scoreboard_find(struct qemu_plugin_scoreboard *score, unsigned int vcpu_index); +/* Macros to define a qemu_plugin_u64 */ +#define qemu_plugin_scoreboard_u64(score) \ + (qemu_plugin_u64) {score, 0} +#define qemu_plugin_scoreboard_u64_in_struct(score, type, member) \ + (qemu_plugin_u64) {score, offsetof(type, member)} + +/** + * qemu_plugin_u64_add() - add a value to a qemu_plugin_u64 for a given vcpu + * @entry: entry to query + * @vcpu_index: entry index + * @added: value to add + */ +QEMU_PLUGIN_API +void qemu_plugin_u64_add(qemu_plugin_u64 entry, unsigned int vcpu_index, + uint64_t added); + +/** + * qemu_plugin_u64_get() - get value of a qemu_plugin_u64 for a given vcpu + * @entry: entry to query + * @vcpu_index: entry index + */ +QEMU_PLUGIN_API +uint64_t qemu_plugin_u64_get(qemu_plugin_u64 entry, unsigned int vcpu_index); + +/** + * qemu_plugin_u64_set() - set value of a qemu_plugin_u64 for a given vcpu + * @entry: entry to query + * @vcpu_index: entry index + * @val: new value + */ +QEMU_PLUGIN_API +void qemu_plugin_u64_set(qemu_plugin_u64 entry, unsigned int vcpu_index, + uint64_t val); + +/** + * qemu_plugin_u64_sum() - return sum of all vcpu entries in a scoreboard + * @entry: entry to sum + */ +QEMU_PLUGIN_API +uint64_t qemu_plugin_u64_sum(qemu_plugin_u64 entry); + #endif /* QEMU_QEMU_PLUGIN_H */ |