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[v4,0/9] TCG plugins new inline operations

Message ID 20240326123426.761473-1-pierrick.bouvier@linaro.org (mailing list archive)
Headers show
Series TCG plugins new inline operations | expand

Message

Pierrick Bouvier March 26, 2024, 12:34 p.m. UTC 
This series implement two new operations for plugins:
- Store inline allows to write a specific value to a scoreboard.
- Conditional callback executes a callback only when a given condition is true.
  The condition is evaluated inline.

It's possible to mix various inline operations (add, store) with conditional
callbacks, allowing efficient "trap" based counters.

It builds on top of new scoreboard API, introduced in the previous series.

NOTE: Two patches still need review

v2
--

- fixed issue with udata not being passed to conditional callback
- added specific test for this in tests/plugin/inline.c (udata was NULL before).

v3
--

- rebased on top of "plugins: Rewrite plugin code generation":
  20240316015720.3661236-1-richard.henderson@linaro.org
- single pass code generation
- small cleanups for code generation

v4
--

- remove op field from qemu_plugin_inline_cb
- use tcg_constant_i64 to load immediate value to store

Pierrick Bouvier (9):
  plugins: prepare introduction of new inline ops
  plugins: extract generate ptr for qemu_plugin_u64
  plugins: add new inline op STORE_U64
  tests/plugin/inline: add test for STORE_U64 inline op
  plugins: conditional callbacks
  tests/plugin/inline: add test for conditional callback
  plugins: distinct types for callbacks
  plugins: extract cpu_index generate
  plugins: remove op from qemu_plugin_inline_cb

 include/qemu/plugin.h        |  42 +++++++----
 include/qemu/qemu-plugin.h   |  80 ++++++++++++++++++++-
 plugins/plugin.h             |  12 +++-
 accel/tcg/plugin-gen.c       | 136 +++++++++++++++++++++++++++--------
 plugins/api.c                |  39 ++++++++++
 plugins/core.c               | 109 ++++++++++++++++++++--------
 tests/plugin/inline.c        | 130 +++++++++++++++++++++++++++++++--
 plugins/qemu-plugins.symbols |   2 +
 8 files changed, 466 insertions(+), 84 deletions(-)