s390/runtime_instrumentation: fix storage key handling
[ Upstream commit5.4-rM2-2.2.x-imx-squashed9eaba29c79
] The key member of the runtime instrumentation control block contains only the access key, not the complete storage key. Therefore the value must be shifted by four bits. Note: this is only relevant for debugging purposes in case somebody compiles a kernel with a default storage access key set to a value not equal to zero. Fixes:e4b8b3f33f
("s390: add support for runtime instrumentation") Reported-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
parent
cc215d2068
commit
d35f24bc56
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@ -57,7 +57,7 @@ static void init_runtime_instr_cb(struct runtime_instr_cb *cb)
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cb->k = 1;
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cb->ps = 1;
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cb->pc = 1;
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cb->key = PAGE_DEFAULT_KEY;
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cb->key = PAGE_DEFAULT_KEY >> 4;
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cb->v = 1;
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}
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