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s390/kvm: basic implementation of diagnose 308 subcode 6

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Linux uses a check for subcode 6 to decide if other subcodes are
available. Provide a minimal implementation for subcode 6, as well
as for subcode 5.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[Move code from kvm.c into misc_helper.c]
This commit is contained in:
Eugene (jno) Dvurechenski 2013-06-19 17:27:15 +02:00 • committed by Christian Borntraeger
parent 39fbc5c62c
commit 268846ba93
3 changed files with 57 additions and 0 deletions
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40
target-s390x/misc_helper.c
View file

@ -179,6 +179,46 @@ uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
return r;
}
#ifndef CONFIG_USER_ONLY
#define DIAG_308_RC_NO_CONF 0x0102
#define DIAG_308_RC_INVALID 0x0402
void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
{
uint64_t addr = env->regs[r1];
uint64_t subcode = env->regs[r3];
if (env->psw.mask & PSW_MASK_PSTATE) {
program_interrupt(env, PGM_PRIVILEGED, ILEN_LATER_INC);
return;
}
if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
return;
}
switch (subcode) {
case 5:
if ((r1 & 1) || (addr & 0x0fffULL)) {
program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
return;
}
env->regs[r1+1] = DIAG_308_RC_INVALID;
return;
case 6:
if ((r1 & 1) || (addr & 0x0fffULL)) {
program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);
return;
}
env->regs[r1+1] = DIAG_308_RC_NO_CONF;
return;
default:
hw_error("Unhandled diag308 subcode %" PRIx64, subcode);
break;
}
}
#endif
/* DIAG */
uint64_t HELPER(diag)(CPUS390XState *env, uint32_t num, uint64_t mem,
uint64_t code)