[kvm-unit-tests PATCH v3 0/3] s390x: Add misaligned instruction tests

[Nina Schoetterl-Glausch <nsg@linux.ibm.com>]

Instructions on s390 must be halfword aligned.
Add two tests for that.
These currently fail when using TCG.

v3 -> v2:
 * pick up R-b (thanks Janosch)
 * use br instead of bcr (thanks Claudio)
 * use text section instead of rodata for ex target (thanks Claudio)
 * fix label position (thanks Claudio)

v1 -> v2:
 * rebase
 * use PSW macros
 * simplify odd psw test (thanks Claudio)
 * rename some identifiers
 * pick up R-b (thanks Claudio)

Nina Schoetterl-Glausch (3):
  s390x/spec_ex: Use PSW macro
  s390x/spec_ex: Add test introducing odd address into PSW
  s390x/spec_ex: Add test of EXECUTE with odd target address

 s390x/spec_ex.c | 85 +++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 76 insertions(+), 9 deletions(-)

Range-diff against v2:
1:  d82f4fb6 ! 1:  6ae1eb7d s390x/spec_ex: Use PSW macro
    @@ Commit message
         Replace explicit psw definition by PSW macro.
         No functional change intended.
     
    +    Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
         Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
     
      ## s390x/spec_ex.c ##
2:  e537797f ! 2:  a0d02438 s390x/spec_ex: Add test introducing odd address into PSW
    @@ s390x/spec_ex.c: static int psw_bit_12_is_1(void)
     +"	. = . + 1\n"
     +"misaligned_code:\n"
     +"	larl	%r0,0\n"
    -+"	bcr	0xf,%r1\n"
    ++"	br	%r1\n"
     +);
     +
     +static int psw_odd_address(void)
3:  dc552880 ! 3:  e771deeb s390x/spec_ex: Add test of EXECUTE with odd target address
    @@ s390x/spec_ex.c: static int short_psw_bit_12_is_0(void)
     +	uint64_t pre_target_addr;
     +	int to = 0, from = 0x0dd;
     +
    -+	asm volatile ( ".pushsection .rodata\n"
    -+		"pre_odd_ex_target:\n"
    ++	asm volatile ( ".pushsection .text.ex_odd\n"
     +		"	.balign	2\n"
    ++		"pre_odd_ex_target:\n"
     +		"	. = . + 1\n"
     +		"	lr	%[to],%[from]\n"
     +		"	.popsection\n"

base-commit: e3c5c3ef2524c58023073c0fadde2e8ae3c04ec6
-- 
2.39.1