Hi All,
This is the 3rd version of I/O Hook, a patch set aimed at intercepting
h/w access by the OS. Some examples of how it can be used:
1) To emulate h/w events (e.g. hotplug)
2) To inject h/w errors to the kernel
3) To trace h/w access by the OS for performance tuning or debugging.
Details of the examples can be found in Documentation/PCI/iohook.txt.
A set of user space tools using I/O Hook for various use cases will be hosted
on https://github.com/iohook. It initially contains inject-aer which takes the
trace event output of /sys/kernel/debug/tracing/events/ras/aer_event/ and
regenerate the same PCIE AER event so that PCIE AER can be easily tested.
Changes since v2:
- Added the hook for MSRs (can specify a cpu number)
- Can trigger IPI by a vector (so that exceptions can be emulated)
- Defined iohook_event as the trace event to trace h/w access. A new
attribute 'tc' can be defined for any Register Override for tracing
purpose.
Rui Wang (5):
I/O Hook: core functions and Register Override
I/O Hook: Help functions to manage the hook
I/O Hook: sysfs interface to emulate h/w events
I/O Hook: Override MSRs while triggering MCEs
IO Hook: Tracing hw access
Documentation/PCI/iohook.txt | 353 ++++++++++
arch/Kconfig | 10 +
arch/x86/boot/compressed/Makefile | 1 +
arch/x86/include/asm/io.h | 57 ++-
arch/x86/include/asm/msr.h | 100 +++-
arch/x86/lib/msr-smp.c | 31 +
arch/x86/vdso/Makefile | 2 +
drivers/misc/Makefile | 1 +
drivers/misc/iohook/Makefile | 1 +
drivers/misc/iohook/iohook.c | 1367 +++++++++++++++++++++++++++++++++++++
drivers/misc/iohook/iohook.h | 6 +
drivers/pci/access.c | 66 ++
include/linux/reg_ovrd.h | 55 ++
include/trace/events/iohook.h | 58 ++
14 files changed, 2101 insertions(+), 7 deletions(-)
create mode 100644 Documentation/PCI/iohook.txt
create mode 100644 drivers/misc/iohook/Makefile
create mode 100644 drivers/misc/iohook/iohook.c
create mode 100644 drivers/misc/iohook/iohook.h
create mode 100644 include/linux/reg_ovrd.h
create mode 100644 include/trace/events/iohook.h
--
1.7.5.4
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