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[S390] virtualization aware cpu measurement

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Use the SPP instruction to set a tag on entry to / exit of the virtual
machine context. This allows the cpu measurement facility to distinguish
the samples from the host and the different guests.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
This commit is contained in:
Carsten Otte
2010-05-17 10:00:04 +02:00
committed by Martin Schwidefsky
parent 6377981faf
commit cd3b70f5d4
8 changed files with 105 additions and 26 deletions
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3
arch/s390/kernel/setup.c
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@@ -2,7 +2,7 @@
* arch/s390/kernel/setup.c
*
* S390 version
* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Copyright (C) IBM Corp. 1999,2010
* Author(s): Hartmut Penner (hp@de.ibm.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*
@@ -401,6 +401,7 @@ setup_lowcore(void)
lc->io_new_psw.mask = psw_kernel_bits;
lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
lc->clock_comparator = -1ULL;
lc->cmf_hpp = -1ULL;
lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
lc->async_stack = (unsigned long)
__alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;