kernel_optimize_test/xor.h at 82fa39552fd858468a5647fa58d14955ecd50eb4 - kernel_optimize_test - AcoSail's gitea

AcoSail/kernel_optimize_test

forked from luck/tmp_suning_uos_patched

Vegard Nossum f85612967c x86: add hooks for kmemcheck

The hooks that we modify are:
- Page fault handler (to handle kmemcheck faults)
- Debug exception handler (to hide pages after single-stepping
  the instruction that caused the page fault)

Also redefine memset() to use the optimized version if kmemcheck is
enabled.

(Thanks to Pekka Enberg for minimizing the impact on the page fault
handler.)

As kmemcheck doesn't handle MMX/SSE instructions (yet), we also disable
the optimized xor code, and rely instead on the generic C implementation
in order to avoid false-positive warnings.

Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>

[whitespace fixlet]
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum <vegardno@ifi.uio.no>

2009-06-15 12:40:02 +02:00

11 lines

200 B

C

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 #ifdef CONFIG_KMEMCHECK
 /* kmemcheck doesn't handle MMX/SSE/SSE2 instructions */
 # include <asm-generic/xor.h>
 #else
 #ifdef CONFIG_X86_32
 # include "xor_32.h"
 #else
 # include "xor_64.h"
 #endif
 #endif