Commit b60d126c authored by Heiko Carstens's avatar Heiko Carstens
Browse files

s390/mm: Let dump_fault_info() print additional information 



Let dump_fault_info() print additional information to make debugging
easier:

Print "FSI" if the access-exception-fetch/store-indication facility is
installed. If it is installed the TEID may also indicate if an exception
happened because of a fetch or a store operation.

Print "SOP", "ESOP-1", or "ESOP-2" depending on the type of the installed
Suppression-on-Protection facility. This also gives additional information
about the validity and meaning of the TEID bits.

The output is changed from something like:

Failing address: 0000000000000000 TEID: 0000000000000803

to

Failing address: 0000000000000000 TEID: 0000000000000803 ESOP-2 FSI

Reviewed-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 76502abc

arch/s390/mm/fault.c

+10 −1
Original line number Diff line number Diff line
@@ -133,8 +133,17 @@ static void dump_fault_info(struct pt_regs *regs) 
	union teid teid = { .val = regs->int_parm_long };

	unsigned long asce;



	pr_alert("Failing address: %016lx TEID: %016lx\n",

	pr_alert("Failing address: %016lx TEID: %016lx",

		 get_fault_address(regs), teid.val);

	if (test_facility(131))

		pr_cont(" ESOP-2");

	else if (machine_has_esop())

		pr_cont(" ESOP-1");

	else

		pr_cont(" SOP");

	if (test_facility(75))

		pr_cont(" FSI");

	pr_cont("\n");

	pr_alert("Fault in ");

	switch (teid.as) {

	case PSW_BITS_AS_HOME: