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target/s390x: Implement Early Exception Recognition

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Generate a specification exception if a reserved bit is set in the PSW
mask or if the PSW address is out of bounds dictated by the addressing
mode.

Reported-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230315020408.384766-3-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2023-03-15 03:04:07 +01:00 • committed by Thomas Huth
parent 377dc84e2d
commit 199c42a6a1
4 changed files with 45 additions and 1 deletions
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26
target/s390x/cpu.c
View file

@ -41,6 +41,26 @@
#define CR0_RESET 0xE0UL
#define CR14_RESET 0xC2000000UL;
#ifndef CONFIG_USER_ONLY
static bool is_early_exception_psw(uint64_t mask, uint64_t addr)
{
if (mask & PSW_MASK_RESERVED) {
return true;
}
switch (mask & (PSW_MASK_32 | PSW_MASK_64)) {
case 0:
return addr & ~0xffffffULL;
case PSW_MASK_32:
return addr & ~0x7fffffffULL;
case PSW_MASK_32 | PSW_MASK_64:
return false;
default: /* PSW_MASK_64 */
return true;
}
}
#endif
void s390_cpu_set_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
{
#ifndef CONFIG_USER_ONLY
@ -57,6 +77,12 @@ void s390_cpu_set_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
env->cc_op = (mask >> 44) & 3;
#ifndef CONFIG_USER_ONLY
if (is_early_exception_psw(mask, addr)) {
env->int_pgm_ilen = 0;
trigger_pgm_exception(env, PGM_SPECIFICATION);
return;
}
if ((old_mask ^ mask) & PSW_MASK_PER) {
s390_cpu_recompute_watchpoints(env_cpu(env));
}