hypervisor call trace module

[PATCH 1/6] powerpc: tracing: Add powerpc tracepoints for interrupt entry and exit · Anton Blanchard <hidden> · 2009-10-27
[PATCH 2/6] powerpc: tracing: Add powerpc tracepoints for timer entry and exit · Anton Blanchard <hidden> · 2009-10-27
[PATCH 3/6] powerpc: tracing: Add hypervisor call tracepoints · Anton Blanchard <hidden> · 2009-10-27
[PATCH 4/6] powerpc: tracing: Give hypervisor call tracepoints access to arguments · Anton Blanchard <hidden> · 2009-10-27
[PATCH 5/6] powerpc: Disable HCALL_STATS by default · Anton Blanchard <hidden> · 2009-10-27
[PATCH 6/6] powerpc: Export powerpc_debugfs_root · Anton Blanchard <hidden> · 2009-10-27
hypervisor call trace module · Anton Blanchard <hidden> · 2009-10-27
Re: [PATCH 1/6] powerpc: tracing: Add powerpc tracepoints for interrupt entry and exit · Steven Rostedt <rostedt@goodmis.org> · 2009-10-27
Re: [PATCH 1/6] powerpc: tracing: Add powerpc tracepoints for interrupt entry and exit · Benjamin Herrenschmidt <benh@kernel.crashing.org> · 2009-10-27

From: Anton Blanchard <hidden>
Date: 2009-10-27 05:02:23

Here is an example of using the hcall tracepoints. This kernel
module provides strace like functionality for hypervisor hcalls:

-> 0x64(ff000002, 1, 2, d0000000034d7a71, f, c000000000a6f388, 1, c000000000989008, c000000000a3f480)
  <- 0x64()

Which was an EOI (opcode 0x64) of 0xff000002

There are a number of drivers that carry a lot of hcall related debug
code just in case we have to chase down a bug. I'm hoping hcall tracepoints
could replace it all and allow for much more powerful debugging.

Anton

Attachments

Makefile [text/plain] 238 bytes · preview
hcall_trace.c [text/x-csrc] 3597 bytes · preview

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