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authorEugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>2013-06-19 17:27:15 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2013-08-30 12:48:25 +0200
commit268846ba93de2529630d623b6ded72cee1221106 (patch)
treee1315fefaa27f40dbc08af86577d72308d85bb50 /target-s390x/misc_helper.c
parent39fbc5c62ce83f34e7f5b62238305d83ce8b4489 (diff)
s390/kvm: basic implementation of diagnose 308 subcode 6
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]
Diffstat (limited to 'target-s390x/misc_helper.c')
-rw-r--r--target-s390x/misc_helper.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
index 454960aa01..9b4423a031 100644
--- a/target-s390x/misc_helper.c
+++ b/target-s390x/misc_helper.c
@@ -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)